Agilent 35670-90066 - Manual

FUSES Only fuses with the required rated current, voltage, and specified type (normalblow, time delay, etc.) should be used. Do not use repaired fuses orshort-circuited fuse holders. To do so could cause a shock or fire hazard. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument ...

Safety Symbols Warning, risk of electric shock Caution, refer to accompanying documents Alternating current Both direct and alternating current Earth (ground) terminal Protective earth (ground) terminal Frame or chassis terminal Terminal is at earth potential. Standby (supply). Units with this symbo...

Accessories The accessories listed in the following table are supplied with the Agilent 35670A. Supplied Accessories Part Number Line Power Cable See page 2-4 Standard Data Format Utilities HP 5061-8042 Agilent 35670A Operator’s Guide Agilent 35670-90053 Agilent 35670A Quick Start Agilent 35670-9005...

In This Book This guide provides instructions for installing, verifying performance, and repairing the Agilent 35670A Dynamic Signal Analyzer. Chapter 1, ‘’Specifications,’’ lists the specifications for the Agilent 35670A and the specifications for the required test equipment. Chapter 2, ‘’Preparing...

Table of Contents 1 Specifications Frequency 1-3Single Channel Amplitude 1-4FFT Dynamic Range 1-5Input Noise 1-6Window Parameters 1-6Single Channel Phase 1-6Cross Channel Amplitude 1-7Cross Channel Phase 1-7Input 1-8Time Domain 1-9Trigger 1-9Tachometer 1-10Source Output 1-11Digital Interfaces 1-12Ge...

2 Preparing the Analyzer for Use To do the incoming inspection 2-5To install the analyzer 2-7To connect the analyzer to a dc power source 2-8To change the fuses 2-10To connect the analyzer to a serial device 2-11To connect the analyzer to a parallel device 2-11To connect the analyzer to an GPIB devi...

4 Troubleshooting the Analyzer How to troubleshoot the analyzer 4-4To perform initial verification 4-5To troubleshoot the power supply 4-11To troubleshoot power-up failures 4-15To troubleshoot CPU, memory, and buses failures 4-18To troubleshoot display failures 4-22To troubleshoot IIC bus failures 4...

7 Replaceable Parts Ordering Information 7-2Assemblies 7-4Cables 7-6Instrument Covers and Handles 7-7Assembly Covers and Brackets 7-8Front Panel Parts 7-9Rear Panel Parts 7-10Chassis Parts 7-11Screws, Washers, and Nuts 7-12Miscellaneous Parts 7-12Option UK4 Parts 7-13

8 Circuit Descriptions Overall Instrument Description 8-2A1 Input 8-6A2 Input 8-12A5 Analog 8-18A6 Digital 8-22A7 CPU 8-25A8 Memory 8-30A9 NVRAM 8-32A10 Rear Panel 8-33A11 Keyboard Controller 8-35A12 BNC 8-36A13 Primary Keypad 8-37A14 Secondary Keypad 8-37A15 Primary Keypad 8-37A22 BNC 8-37A90 Fan 8...

Specifications This chapter contains the specifications for the Agilent 35670A Dynamic Signal Analyzer and the critical specifications for the equipment required to test the Agilent 35670A.Instrument specifications apply after 15 minutes warm-up and within 2 hours of the last self-calibration. When ...

Frequency Maximum range 1 channel mode 2 channel mode 4 channel mode (option AY6 only) 102.4 kHz, 51.2 kHz (option AY6†) 51.2 kHz 25.6 kHz Spans 1 channel mode 2 channel mode 4 channel mode (option AY6 only) 195.3 mHz to 102.4 kHz 97.7 mHz to 51.2 kHz 48.8 mHz to 25.6 kHz Minimum resolution 1 channe...

Single Channel Amplitude Absolute amplitude accuracy (FFT) (A combination of full scale accuracy, full scale flatness, and amplitude linearity.) ± 2.92% (0.25 dB) of reading ± 0.025% of full scale FFT full scale accuracy at 1 kHz (0 dBfs) ± 0.15 dB (1.74%) FFT full scale flatness (0 dBfs) relative t...

FFT Dynamic Range Spurious free dynamic range (Includes spurs, harmonic distortion, intermodulation distortion, alias products) Excludes alias responses at extremes of span.Source impedance = 50 Ω < − 80 dBfs (90 dB typical) FFT noise floor (typical) Flat top window, 64 RMS averages Harmonic dist...

Input Noise Input noise levelFlat top window, − 51 dBVrms range, source impedance = 50 Ω , 32 rms averages Above 1280 Hz 160 Hz to 1.28 kHz (6.4 kHz span) <–140 dBVrms/ √ — Hz <–130 dBVrms/ √ — Hz< % 0 > Note: To calculate noise as dB below full scale: Noise [dBfs] = Noise [dBVrms/ Hz ] ...

Cross Channel Amplitude FFT cross channel gain accuracy Frequency response mode, same amplitude range(AC coupled, Peroidic Chirp, Uniform Window, > =4Hz) At full scale: Tested with 10 rms averageson the − 11 to +27 dBvrms ranges, and 100 rms averages on the − 51 dBVrms range ± 0.04 dB (0.46%) At ...

Input Input ranges (full scale) (auto-range capability) +27 dBVrms (31.7 Vpk) to − 51 dBVrms (3.99 mVpk) in 2 dB steps Maximum input levels 42 Vpk Input impedance 1 M Ω ±10%, 90 pF nominal Low side to chassis impedance Floating mode Grounded mode 1 M Ω ±30%, <0.010 µ F (typical) ≤ 100 Ω AC coupli...

Tachometer Pulses per revolution 0.5 to 2048 RPM accuracy ± 100 ppm (0.01%) (typical) Tachometer level range Low range High range –4 V to +4 V –20 V to +20 V Tachometer level resolution Low range High range 100 mV 500 mV Tachometer level accuracy (as a % of tachometer range setting) ± 10% of range M...

Source Output Source types Sine, random noise, chirp, pink noise, burst random, burst chirp Amplitude range ac: ± 5 V peak † dc: ± 10 V † † Vac pk + |Vdc| ≤ 10 V AC amplitude resolution Voltage ≥ 0.2 Vrms Voltage < 0.2 Vrms 2.5 mVpk 0.25 mVpk DC offset accuracy ± 15 mV±3% of ( |Vdc| +Vac pk ) set...

Digital Interfaces External keyboard Compatible with PC-style 101-key keyboard model number HP C1405A (#ABA) (DIN connector) and HP keyboard cable part number 5081-2249. GPIB Conforms to the following standards: IEEE 488.1 (SH1, AH1, T6, TEO, L4, LE0, RS1, RL1, PP0, DC1, DT1, C1, C2, C3, C12, E2) IE...

General Specifications Safety Standards CSA Certified for Electronic Test and Measurement Equipment per CSA C22.2, No. 231 This product is designed for compliance to: UL1244, Fourth Edition IEC 348, Second Edition, 1978 EMI/RFI Standards CISPR 11 Acoustics LpA <55 dB (cooling fan at high speed se...

Order Tracking — Option 1D0 Max Order Max RPM 60 × ≤ Real time (online) 1 channel mode 2 channel mode 4 channel mode 25,600 Hz 12,800 Hz 6,400 Hz Capture playback † 1 channel mode 2 channel mode 4 channel mode 102,400 Hz 51,200 Hz 25,600 Hz Specified for5 ≤ RPM ≤ 60,000 (online), 5 ≤ RPM ≤ 491,519 (...

Real Time Octave Analysis — Option 1D1 Standards Conforms to ANSI Standard S1.11 - 1986, Order 3, Type 1-D, Extended and Optional Frequency Ranges Conforms to IEC 651-1979 Type 0 Impulse, and ANSI S1.4 Frequency ranges (at centers) Online (real time) 1/1 octave 1/3 octave 1/12 octave 1 channel 0.063...

Recommended Test Equipment The following table lists the recommended equipment needed to test the performance of the Agilent 35670A Dynamic Signal Analyzer. The table on page 1-20 lists additional equipment needed to adjust and troubleshoot the analyzer. Other equipment may be substituted for the re...

Recommended Test Equipment (continued) Instrument Critical Specifications Recommended Model Cables BNC-to-Dual Banana (6) BNC-to-BNC 30 cm BNC-to-BNC 122 cm HP 11001-60001 HP 8120-1838 HP 8120-1840 Adapters BNC(m)-to-Dual Banana Plug BNC(f)-to-Dual Banana Plug BNC(f)-to-BNC (f) (4) BNC Tee (m)(f)(f)...

Schematic and Parts List for Notch Filter The Harmonic Distortion performance test requires either an HP 339A or an HP 3326A or HP 3325A/B with notch filter. The following shows the schematic and parts list for the notch filter. Reference Description Agilent Part Number C1 - C4 0.025 µ F ±2.5%, 100 ...

Preparing the Analyzer for Use This chapter contains instructions for inspecting and installing the Agilent 35670A Dynamic Signal Analyzer. This chapter also includes instructions for cleaning the screen, transporting and storing the analyzer. DC Power Requirements The analyzer can operate from a dc...

DC Power Cable and Grounding Requirements The negative side of the dc input connector is not connected to chassis ground. In dc mode operation, the chassis will float. The chassis ground lug on the rear panel and the negative side of the dc input connector should both be connected to a known referen...

To do the incoming inspection The Agilent 35670A Dynamic Signal Analyzer was carefully inspected both mechanically and electrically before shipment. It should be free of marks or scratches, and it should meet its published specifications upon receipt. • Inspect the analyzer for physical damage incur...

• Check that the correct fuses are installed in the fuse holders. An 8 amp, 250 volt, normal blow fuse is required for ac operation. A 30 amp, 32 volt, normal blow fuse is required for dc operation. Both fuses are installed at the factory. For instructions on removing the fuses or fuse part numbers,...

To install the analyzer The analyzer is shipped with rubber feet and bail handle in place, ready for use as a portable or bench analyzer. • Install the analyzer to allow free circulation of cooling air. Cooling air enters the analyzer through the right side and exhausts through the left side and rea...

To connect the analyzer to a dc power source In applications requiring a portable dc power source, use a properly protected dc power system. The dc system should contain a deep cycle battery rather than a standard automobile battery. A standard automobile battery will fail prematurely if repeatedly ...

• Turn on the dc power source. If the dc power source is supplied by an automobile, start the automobile. The automobile must be running to provide adequate dc power. Warning The tip of the cigarette lighter adapter may get hot during use. After unpluging the adapter, be careful of the heat from the...

To change the fuses Both fuses are installed at the factory. • Unplug the power cord from the analyzer. • Press in and turn the appropriate fuse holder cap counter-clockwise (use a small screw driver for the ac fuse). Remove when the fuse cap is free from the housing. • Pull the fuse from the fuse h...

To connect the analyzer to a serial device The Serial Port is a 9-pin, EIA-574 port that is only available using option 1C2, Instrument Basic. The total allowable transmission path length is 50 feet. • Connect the analyzer’s rear panel SERIAL PORT to a serial device using a 9-pin female to 25-pin RS...

To connect the analyzer to an GPIB device The analyzer is compatible with the Agilent Technologies Interface Bus (GPIB). The GPIB is Agilent Technologies’s implementation of IEEE Standard 488.1. Total allowable transmission path length is 2 meters times the number of devices or 20 meters, whichever ...

To connect the analyzer to an external monitor The External Monitor connector is a 9-pin D female miniature connector that can interface with an external, multisync monitor. The monitor must be compatible with the 24.8 kHz line rate, 55 Hz frame rate, and TTL signals provided by the Agilent 35670A. ...

To connect the optional keyboard The analyzer may be connected to an optional external keyboard. The keyboard remains active even when the analyzer is not in alpha entry mode. This means that you can operate the analyzer using the external keyboard rather than the front panel. Pressing the appropria...

• Connect the other end of the keyboard cable to the keyboard. Caution In addition to the U.S. English keyboard, the Agilent 35670A Dynamic Signal Analyzer supports U.K. English, German, French, Italian, Spanish, and Swedish. Use only the Agilent Technologies approved keyboard for this product. Agil...

To connect the microphone adapter The Microphone Adapter and Power Supply (option UK4) simplifies microphone connections. The mic connector on the analyzer’s front panel provides 8 Vdc to power the adapter. The adapter’s internal power supply uses a step-up converter to provide 28 V and 200 V on the...

To clean the screen The analyzer’s display is covered with a plastic diffuser screen (this is not removable by the operator). Under normal operating conditions, the only cleaning required will be an occasional dusting. However, if a foreign material adheres itself to the screen, do the following: • ...

To transport the analyzer • Package the analyzer using the original factory packaging or packaging identical to the factory packaging. Containers and materials identical to those used in factory packaging are available through Agilent Technologies offices. • If returning the analyzer to Agilent Tech...

If the analyzer will not power up q Check that the power cord is connected to the Agilent 35670A and to a live power source. q Check that the front-panel switch is on ( l ). q Check that the rear-panel AC/DC power select switch is properly set. q Check that the fuse is good. See ‘’To change the fuse...

If the analyzer operates intermittently on dc power The analyzer powers down when operating on dc power if no measurement has been made within 30 minutes. q Check that the dc power source can supply the required power. The dc power source must have a true range of 10.8 to 30.8 Vdc. At the minimum vo...

Verifying Specifications This chapter tells you how to use the Agilent 35670A Semiautomated Performance Test Disk . The performance test disk contains a program that semiautomates the operation verification tests and performance tests. After you review this chapter, follow the directions in ‘’To loa...

Features of the Program • The program can automatically create a printout similar to the test records at the back of this chapter. • The program can beep when equipment connections need to be changed. • The program can start the test sequence at any test in the operation verification or performance ...

Program Controlled Test Equipment This program automatically controls the instruments listed in the following table using GPIB commands. If you use a test instrument other than those shown in the table, the program prompts you to set the instrument state during testing. Test Equipment Program Contro...

Specifications and Performance Tests The following table lists specifications and the performance test or tests that verify each specification. Specification Performance Test Frequency Accuracy Frequency Accuracy Single Channel Amplitude Residual dc response FFT full scale accuracy at 1 kHz FFT full...

To load the program For information about the program’s softkeys, see the menu descriptions starting on page 3-51. • Set the Agilent 35670A Dynamic Signal Analyzer’s power switch to off ( O ), then connect the analyzer, test instruments, and printer using GPIB cables. • If you have the PC Style Keyb...

To run the program in semiautomated mode You must have an GPIB printer connected to your system to run the program in semiautomated mode. If you do not have a printer, see ‘’To run the program without a printer’’ later in this chapter. • Press the following keys and when the program prompts you, typ...

• Press the following keys and type in the printer address when the program prompts you: [ TEST CONFIG ] [ PRINTER ADDRESS ] [ PROCEDURE ] [ OP_VERIFY ] or [ PERFORMAN ] [ STOP AFTER ] [ LIMIT FAILURE ] or [ NONE ] [ RETURN ] • Press the following keys to start the test: [ START TESTING ] [ START BE...

To run the program without a printer Use this procedure if you do not have an GPIB printer connected to yout system. • Write in the information needed on the title page of the selected test record. The test records are located near the back of this chapter and may be copied without written permissio...

To run the program in manual mode Use this procedure if you want to run the program in manual mode. You will be prompted to set up all test equipment and you can check the analyzer’s setup state after each measurement. • Write in the information needed on the title page of the selected test record. ...

To set up the self test Performance Test and Operation Verification This test checks the measurement hardware in the Agilent 35670A. No performance tests should be attempted until the analyzer passes this test. This test takes approximately one minute to complete, and requires no external equipment....

To set up the dc offset test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its single channel amplitude specification for residual dc responses. In this test, the Agilent 35670A measures its internal residual dc offset at two amplitudes. 1 2 ch 1 4 ch V...

To set up the noise test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its input noise specification. In this test, the Agilent 35670A measures its internal noise level. 1 2 ch 1 4 ch Agilent 35670A Verifying Specifications To set up the noise test 3-15

To set up the spurious signals test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its FFT dynamic range specification for spurious and residual responses. In this test, the Agilent 35670A measures its internal spurious signals. The test records at the e...

To set up the amplitude accuracy test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its single channel amplitude specification for FFT full scale accuracy at 1 kHz. In this test, an ac calibrator outputs a 1 kHz signal with an exact amplitude to all cha...

To set up the flatness test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its single channel amplitude specification for FFT full scale flatness relative to 1 kHz. In this test, the ac calibrator outputs a signal with an exact amplitude to all channels....

To set up the amplitude linearity test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its single channel amplitude specification for FFT amplitude linearity at 1 kHz. In this test, the ac calibrator outputs a 1 kHz signal with an an exact amplitude to al...

To set up the A-weight filter test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its input specification for A-weight filter. In this test, an ac calibrator outputs a 1 dBVrms signal with an exact amplitude to all channels. The test records at the end o...

To set up the channel match test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its cross channel amplitude and cross channel phase specification. In this test, the Agilent 35670A’s source outputs an identical signal to all channels. The Agilent 35670A m...

To set up the frequency accuracy test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its frequency accuracy specification. In this test, the analyzer measures the frequency of an accurate 50 kHz signal. 1 2 ch 1 4 ch Verifying Specifications Agilent 3567...

To set up the anti-alias filter test Performance Test only This test verifies that the Agilent 35670A meets its FFT dynamic range specification for frequency alias responses. In this test, a frequency synthesizer outputs a − 9 dBVrms signal known to cause an alias frequency to all channels. The Agil...

To set up the input coupling test Performance Test only This test verifies that the Agilent 35670A meets its input specification for ac coupling rolloff. In this test, a frequency synthesizer outputs a 1 Hz signal to all channels. The signal is measured in both ac and dc coupled modes. The value mea...

To set up the harmonic distortion test Performance Test only This test verifies that the Agilent 35670A meets its FFT dynamic range specification for harmonic distortion. In this test, a low distortion oscillator or a frequency synthesizer and 24.5 kHz notch filter outputs a signal to all channels. ...

2 A 4 ch Using a synthesizer and notch filter Agilent 35670A Verifying Specifications To set up the harmonic distortion test 3-27

To set up the intermodulation distortion test Performance Test only This test verifies that the Agilent 35670A meets its FFT dynamic range specification for intermodulation distortion. In this test, two signals are combined to provide a composite signal to all channels. The intermodulation products ...

To set up the cross talk test Performance Test only This test verifies that the Agilent 35670A meets its input specification for channel-to-channel and channel-to-source cross talk. In this test, the Agilent 35670A measures the amount of energy induced from the source or input channel to another inp...

To set up the single channel phase accuracy test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its single channel phase accuracy specification. In this test, a frequency synthesizer outputs an identical square wave to all channels and a synchronized TTL...

To set up the external trigger test Performance Test only This test verifies that the Agilent 35670A meets its trigger specification for external trigger level accuracy. In this test, a frequency synthesizer outputs a 1 kHz signal to the external trigger input and a 12.8 kHz signal to channel 1. The...

To set up the tach function test Performance Test and Operation Verification This test is only for Agilent 35670A’s with option 1D0, computed order tracking. This test verifies that the Agilent 35670A meets its tachometer specification for trigger level accuracy. In this test, a frequency synthesize...

To set up the input resistance test Performance Test only This test verifies that the Agilent 35670A meets its input resistance specification. In this test, a digital multimeter directly measures the input resistance of each channel. The digital multimeter is set to the 1 M Ω range. 1 2 ch 2 2 ch 1 ...

To set up the ICP supply test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its input specification for ICP signal conditioning. In this test, a digital multimeter directly measures the open circuit voltage of each channel. The digital multimeter measur...

To set up the source amplitude accuracy test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its source output specification for sine amplitude accuracy at 1 kHz. In this test, a digital multimeter measures the amplitude accuracy of the source. Source amp...

To set up the source output resistance test Performance Test only This test verifies that the Agilent 35670A meets its source output specification for resistance. In this test, a digital multimeter measures the 50 Ω feedthrough termination. The channel 1 input then measures the source output across ...

To set up the source dc offset test Performance Test only This test verifies that the Agilent 35670A meets its source output specification for dc offset accuracy. In this test, a digital multimeter measures the dc offset voltage of the source with and without an ac component. The frequency of the ac...

To set up the source flatness test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its source output specification for sine flatness. In this test, the analyzer’s channel 1 input measures the flatness of its source. 1 2 ch 1 4 ch Agilent 35670A Verifying ...

To set up the source distortion test Performance Test and Operation Verification This test verifies that the Agilent 35670A meets its source output specification for harmonic and sub-harmonic distortion and spurious signals. In this test, the analyzer’s source is connected to its channel 1 input. Th...

Agilent 35670A Verifying Specifications 3-51 ITM_35670A Main Menu Descriptions If you do not have a keyboard connected to the analyzer, use the numeric key pad and the alpha keys to enter names or numbers. See the analyzer’s help text for a description of the alpha keys.Load and run the ITM_35670A p...

Verifying Specifications Agilent 35670A 3-52 Start Testing Menu Descriptions Press [ START TESTING ] to display the following softkeys: [ START BEGINNING ] Prints the test record title page information and starts the selected test procedure at the beginning. When you select [ START BEGINNING ], the ...

Agilent 35670A Verifying Specifications 3-53 Test Configuration Menu Descriptions Press [ TEST CONFIG ] to display the test configuration and the following softkeys: [ Agilent 35670A ADDRESS ] Prompts you to enter the GPIB address for the Agilent 35670A Dynamic Signal Analyzer. The GPIB addresses eq...

Verifying Specifications Agilent 35670A 3-54 Equipment Configuration Menu Descriptions Press [ EQUIP CONFIG ] to display the test equipment configuration and the following softkeys: [ AC CALIBRATO ] Prompts you to enter the model, serial number, GPIB address, and calibration due date for the ac cali...

Agilent 35670A Verifying Specifications 3-55 Title Page Menu Descriptions Press [ TITLE PAGE ] to display the title page information and the following softkeys: [ TEST FACILITY ] Prompts you to enter the name or number of the testing entity. [ FACILITY ADDRESS ] Prompts you to enter the address of t...

Performance Test Record - Two Channel Test Facility ___________________________________________________________ Facility Address ________________________________________________________ Tested By _____________________________________________________________ Report Number_____________________________...

Self Test Measurement Lower Limit Upper Limit Measured Value Pass/Fail Long Confidence DC Offset Measurement Lower Limit Upper Limit (dBfs) Measured Value (dBfs) Pass/Fail − 51 dBVrms, Ch 1 − 15 − 51 dBVrms, Ch 2 − 15 − 35 dBVrms, Ch 1 − 30 − 35 dBVrms, Ch 2 − 30 Noise Measurement Lower Limit Upper ...

Spurious Signals Two Ch, 0 Hz Start, Ch 1 − 80 Two Ch, 0 Hz Start, Ch 2 − 80 Two Ch, 200 Hz Start, Ch 1 − 80 Two Ch, 200 Hz Start, Ch 2 − 80 Two Ch, 400 Hz Start, Ch 1 − 80 Two Ch, 400 Hz Start, Ch 2 − 80 Two Ch, 600 Hz Start, Ch 1 − 80 Two Ch, 600 Hz Start, Ch 2 − 80 Two Ch, 800 Hz Start, Ch 1 − 80...

Measurement Lower Limit (dB) Upper Limit (dB) Measured Value (dB) Pass/Fail − 11 dBVrms, 99.84 kHz, One Ch, Ch 1 − 0.2 0.2 27 dBVrms, 51.2 kHz, Two Ch, Ch 1 − 0.2 0.2 27 dBVrms, 51.2 kHz, Two Ch, Ch 2 − 0.2 0.2 9 dBVrms, 51.2 kHz, Two Ch, Ch 1 − 0.2 0.2 9 dBVrms, 51.2 kHz, Two Ch, Ch 2 − 0.2 0.2 − 1...

A-Weight Filter Measurement Lower Limit (dB) Upper Limit (dB) Measured Value (dB) Pass/Fail Ch 1, 10 Hz − 5 2 Ch 2, 10 Hz − 5 2 Ch 1, 31.62 Hz − 1 1 Ch 2, 31.62 Hz − 1 1 Ch 1, 100 Hz − 0.7 0.7 Ch 2, 100 Hz − 0.7 0.7 Ch 1, 1000 Hz − 0.7 0.7 Ch 2, 1000 Hz − 0.7 0.7 Ch 1, 10000 Hz − 3 2 Ch 2, 10000 Hz ...

Harmonic Distortion Measurement Lower Limit Upper Limit (dBfs) Measured Value (dBfs) Pass/Fail Single, 12.25 kHz 2nd, Ch 1 − 80 Two Ch, 12.25 kHz 2nd, Ch 1 − 80 Two Ch, 12.25 kHz 2nd, Ch 2 − 80 Single, 8.167 kHz 3rd, Ch 1 − 80 Two Ch, 8.167 kHz 3rd, Ch 1 − 80 Two Ch, 8.167 kHz 3rd, Ch 2 − 80 Single,...

Performance Test Record - Four Channel Test Facility ___________________________________________________________ Facility Address ________________________________________________________ Tested By _____________________________________________________________ Report Number____________________________...

Two Ch, 44800 Hz Start, Ch 1 − 80 Two Ch, 44800 Hz Start, Ch 2 − 80 Two Ch, 46400 Hz Start, Ch 1 − 80 Two Ch, 46400 Hz Start, Ch 2 − 80 Two Ch, 48000 Hz Start, Ch 1 − 80 Two Ch, 48000 Hz Start, Ch 2 − 80 Two Ch, 49600 Hz Start, Ch 1 − 80 Two Ch, 49600 Hz Start, Ch 2 − 80 Amplitude Accuracy Measureme...

Flatness Measurement Lower Limit (dB) Upper Limit (dB) Measured Value (dB) Pass/Fail 27 dBVrms, 51.2 kHz, One Ch, Ch 1 − 0.2 0.2 9 dBVrms, 51.2 kHz, One Ch, Ch 1 − 0.2 0.2 − 11 dBVrms, 51.2 kHz, One Ch, Ch 1 − 0.2 0.2 27 dBVrms, 51.2 kHz, Two Ch, Ch 1 − 0.2 0.2 27 dBVrms, 51.2 kHz, Two Ch, Ch 2 − 0....

Intermodulation Distortion Measurement Lower Limit Upper Limit (dBfs) Measured Value (dBfs) Pass/Fail Two Ch, F1+F2, 1952 Hz, Ch 1 − 80 Two Ch, F1+F2, 1952 Hz, Ch 2 − 80 Two Ch, F1 − 2F2, 1048 Hz, Ch 1 − 80 Two Ch, F1 − 2F2, 1048 Hz, Ch 2 − 80 Two Ch, F1+F2, 48.048 kHz, Ch 1 − 80 Two Ch, F1+F2, 48.0...

Operation Verification Test Record - Two Channel Test Facility ___________________________________________________________ Facility Address ________________________________________________________ Tested By _____________________________________________________________ Report Number__________________...

ICP Supply Measurement Lower Limit Upper Limit Measured Value Pass/Fail Ch 1 Open Circuit Voltage 26 Vdc 32 Vdc Vdc Ch 2 Open Circuit Voltage 26 Vdc 32 Vdc Vdc Ch 1 Current 2.75 mA 5.75 mA mA Ch 2 Current 2.75 mA 5.75 mA mA Source Amplitude Accuracy Measurement Lower Limit (%) Upper Limit (%) Measur...

Operation Verification Test Record - Four Channel Test Facility ___________________________________________________________ Facility Address ________________________________________________________ Tested By _____________________________________________________________ Report Number_________________...

A Weight Filter Measurement Lower Limit (dB) Upper Limit (dB) Measured Value (dB) Pass/Fail Ch 1, 10 Hz − 5 2 Ch 2, 10 Hz − 5 2 Ch 3, 10 Hz − 5 2 Ch 4, 10 Hz − 5 2 Ch 1, 31.62 Hz − 1 1 Ch 2, 31.62 Hz − 1 1 Ch 3, 31.62 Hz − 1 1 Ch 4, 31.62 Hz − 1 1 Ch 1, 100 Hz − 0.7 0.7 Ch 2, 100 Hz − 0.7 0.7 Ch 3, ...

Four Ch, 4/3, 7 dBV FS Phs − 0.5 0.5 Four Ch, 4/3, − 13 dBV FS Mag − 0.04 0.04 Four Ch, 4/3, − 13 dBV FS Phs − 0.5 0.5 Four Ch, 4/3, − 33 dBV FS Mag − 0.04 0.04 Four Ch, 4/3, − 33 dBV FS Phs − 0.5 0.5 Four Ch, 4/3, 7 dBV − 20 dBfs Mag − 0.08 0.08 Four Ch, 4/3, 7 dBV − 20 dBfs Phs − 0.5 0.5 Frequency...

Single Ch Phase Accuracy Measurement Lower Limit (deg) Upper Limit (deg) Measured Value (deg) Pass/Fail Positive slope, Ch 1 − 4 4 Positive slope, Ch 2 − 4 4 Positive slope, Ch 3 − 4 4 Positive slope, Ch 4 − 4 4 Negative slope, Ch 1 − 4 4 Negative slope, Ch 2 − 4 4 Negative slope, Ch 3 − 4 4 Negativ...

Troubleshooting the Analyzer This chapter contains troubleshooting tests that can isolate most failures to the faulty assembly. The section ‘’How to troubleshoot the analyzer’’ tells you which test to start with based on the failure. The test you start with will either isolate the faulty assembly or...

Equipment Required See ‘’Recommended Test Equipment’’ starting on page 1-17 for tables listing recommended equipment. Any equipment which meets the critical specifications given in the tables may be substituted for the recommended model. Troubleshooting Hints • Incorrect bias supply voltages can cau...

How to troubleshoot the analyzer • Review ‘’Safety Considerations’’ and ‘’Troubleshooting Hints.’’ Warning Service must be performed by trained service personnel who are aware of the hazards involved (such as fire and electrical shock). • See chapter 6, ‘’Replacing Assemblies,’’ to determine how to ...

To perform initial verification Use this test to check signals that are vital to the operation of the analyzer. q Step 1. Check the power select switch and fuse. • Check that the POWER SELECT switch on the rear of the analyzer is set to the AC position. • Check that the correct line fuse is installe...

q Step 5. Check the power supply LED and fan. • Set the power switch to off ( O ) and disconnect the power cord from the rear panel. • Remove the cover. See ‘’To remove cover’’ on page 6-6. • Connect the power cord and set the power switch to on ( l ). • If the green power supply LED is not lit, go ...

q Step 7. Check signals required for power up. • Using a logic probe, check the following signals. Signal Name Test Location TTL State Probable Faulty Assembly PVALID A7 P8 pin 3 High A98 Power Supply RSTn A7 P8 pin 5 High A7 CPU CASn A7 P7 pin 3 Toggling A7 CPU RASn A7 P7 pin 4 Toggling A7 CPU VDAT...

To troubleshoot the power supply Use this test to check the Power Supply and Fan assemblies. This test can also isolate the assembly causing the Power Supply to shut down. q Step 1. Check the power supply LED. • Set the power switch to off ( O ). • Disconnect the ribbon cable from the A98 Power Supp...

• Remove the A7 CPU assembly. See ‘’To remove CPU’’ on page 6-11. • Set the power switch to on ( l ). • If the power supply LED is still off, set the power switch to off ( O ), reconnect the CPU assembly, and go to Step 6. q Step 5. Repeat the following steps until the assembly causing the Power Sup...

To troubleshoot power-up failures Use this test when the screen is defective, when the analyzer does not respond correctly to the keyboard, or when it takes more than 3 minutes for the keyboard to become active. Any of the following conditions may cause a power-up failure: • A defective CPU or Memor...

q Step 2. Determine if the power-on test passed or failed. • Set the power switch to off ( O ). • Set the power switch to on ( l ) while watching the power-on LEDs. The power-on LEDs are on the A7 CPU assembly and are visible through the rear panel. To see the LEDs easier, remove the seven screws ho...

Binary (DS5) (DS9) Hexa-decimal ~Time LEDsVisible Description 1111 1111 0000 0000 FF 00 200 ms on 200 ms off A7 flashes LEDs 0000 1000 08 † starting A7 test 0000 0010 02 † A8 RAM DSACK test 0001 0100 14 † starting A8 RAM test 0001 0110 16 † starting A8 refresh test 0001 1100 1C 4s starting A8 progra...

To troubleshoot CPU, memory, and buses failures Use this test to isolate the failure when the power-on LEDs show a fail code or the analyzer locks up during the power-up tests. q Step 1. Compare the LED fail code to the following table. • Set the power switch to off ( O ). • Set the power switch to ...

Binary (DS5) (DS9) Hexadecimal Probable Faulty Assembly 0000 0100 1111 1111 0001 0011 0000 0001 0001 0111 0001 1000 0000 1001 0000 1011 0001 1010 0001 1001 0000 1000 0001 0010 1010 0000 04 FF 13 01 17 18 09 0B 1A 19 08 12 A0 A7 CPU 0000 0010 0001 1011 0001 0100 0001 0110 0001 1100 02 1B 14 16 1C A8 ...

q Step 3. Determine if the Memory or Display assembly is causing the failure. • Set the power switch to off ( O ). • Reconnect the Memory assembly to the CPU assembly. • Set the power switch to on ( l ) while watching the power-on LEDs. The LEDs should sequence through 00 (clear LEDs) with 00 remain...

To troubleshoot display failures Use this test to isolate display failures to the A101 Display assembly, A102 DC-DC Converter assembly, or A7 CPU assembly. q Step 1. Check the DC-DC Converter assembly. • Set the power switch to off ( O ). • Connect the voltmeter to A102 TP1. • Set the power switch t...

q Step 2. Check the CPU signals to the Display assembly. • Set the power switch to on ( l ). • Using a logic probe, check that the following TTL signals are toggling. Test Location Signal Name In/Out A7 P2(9) VSYNCEL A7 Out A7 P2(11) HSYNCELn A7 Out A7 P2(13) VCLK A7 Out A7 P2(15) VID A7 Out • If th...

q Step 3. Determine the probable faulty assembly by comparing the analyzer’s symptoms to the following table. Symptom Probable Faulty Assembly Vertical and horizontal scanning is occurring Part of information is missing, for example only half letters Blocks of information are missing Information on ...

To troubleshoot IIC bus failures Use this test to isolate IIC (Inter-IC) bus failures to one of the following assemblies: • A7 CPU • A1/A2 Input • A5 Analog • A10 Rear Panel • A11 Keyboard Controller q Step 1. Disconnect all assemblies connected to the CPU assembly’s IIC bus. • Set the power switch ...

q Step 2. Check the serial clock (SCL). • Attach a logic probe to A7 P7 pin 2 (SCL). • Set the power switch to on ( l ). • Press SW2 (reset switch) while monitoring A7 P7 pin 2 (SCL), the power-on LEDs, and the display. The TTL logic level should toggle when 00 is displayed and toggle continuously w...

• If the signal does not toggle after SW2 is pressed, the A7 CPU assembly is probably faulty. • If no error messages are displayed after Booting System or A7 DS101 (green run LED) is off, go to page 4-29, ‘’To troubleshoot fast bus failures.’’ q Step 3. Check the serial data line (SDA). • Attach the...

To troubleshoot fast bus failures Use this test to isolate Fast Bus failures to the A7 CPU assembly or A6 Digital assembly. • Set the power switch to off ( O ). • Set the power switch to on ( l ) while holding in the [ System Utility ] key. The screen displays Fast Bus Diagnostic Test ... and the po...

To perform self tests Use this test when one of the following occurs: • Performance test fails • Calibration fails • Trigger fails • GPIB fails • Microphone power fails • Serial port fails • Parallel port fails • Failure is intermittent q Step 1. Run all the functional self tests. • Connect the rear...

q Step 2. Compare the analyzer’s self-test results to the following table. • When the tests have finished, press the following keys: [ Rtn ] [ TEST LOG ] • Press the [ PREVIOUS PAGE ] softkey until the first page of test log is displayed. To print the test log to a GPIB printer, press the following ...

q Step 3. Determine the probable faulty assembly and next test by comparing the analyzer’s symptoms to the following table. Failure Probable Faulty Assembly Next Test Disk drive A100 Disk Drive Flexible disk Disk drive cable A7 CPU Disk drive, page 4-57 GPIB A10 Rear Panel † Serial port A10 Rear Pan...

To troubleshoot self-test lockup failures Use this test to continue troubleshooting if the analyzer locked up while running the functional test ALL. q Step 1. Check the clock signal. • Set the power switch to on ( l ). • Using an oscilloscope and a 1 M 10:1 probe, check the following signal. Oscillo...

q Step 2. Run the IIC and fast bus self tests. • Press the following keys: [ System Utility ] [ CALIBRATN ] [ AUTO CAL OFF ] [ Input ] [ ALL CHANNELS ] [ CH* FIXED RANGE ] 1 [ Vpk ] [ System Utility ] [ MORE ] [ SELF TEST ] [ TEST LOG ] [ Rtn ] [ FUNCTIONL TESTS ] [ I/O ] [ IIC BUS ] • If the keyboa...

q Step 4. Run the remaining self tests. • Connect the rear panel SOURCE output to the rear panel TACH input using a BNC cable. • Remove all cables from the front panel input connectors. Caution The ICP self test outputs approximately 30 Vdc on the input connectors. Before starting the self tests, di...

To troubleshoot intermittent failures Use this test to isolate intermittent failures to the assembly. • Determine if your intermittent failure is caused by one of the following common causes. Common Reasons Troubleshooting Procedure Loose screws and cables Check that the screws in the analyzer are t...

To troubleshoot performance test failures With the exception of the Quick Confidence test, all functional self tests must pass before the following table is valid. q Step 1. If the analyzer failed a performance test, compare the failing performance test to the following table. If more than one perfo...

To troubleshoot source and calibrator failures Use this test to isolate source and calibrator failures to the A6 Digital assembly, the A5 Analog assembly, the A1/A2 Input assembly, the A12 BNC assembly, or the A10 Rear Panel assembly. q Step 1. Check the sine wave output. • Set the power switch to o...

q Step 2. Check the dc offset. • Connect the voltmeter to A5 TP3. • Press the following keys: [ LEVEL ] 0 [ Vpk ] [ DC OFFSET ] • Rotate the RPG knob while monitoring the voltmeter. • If the voltmeter’s voltage does not change from +2.3 to 2.3 as the dc offset value is varied between 10 and +10 Vdc,...

• Press the following keys: [ System Utility ] [ CALIBRATN ] [ AUTO CAL OFF ] [ Input ] [ ALL CHANNELS ] [ CH* FIXED RANGE ] 1 [ Vpk ] [ Source ] [ SOURCE ON ] [ LEVEL ] 1 [ Vpk ] [ System Utility ] [ MORE ] [ SERVICE TESTS ] [ SPCL TEST MODES ] [ HIGH LEVEL CAL ] • If the signal does not look like ...

❑ Step 5. Check the Input assembly. • Using an oscilloscope and a 10:1 probe, check the following signal. Oscilloscope Setup Parameters Waveform Connect CH1 to A1/A2 TP 300 Amplitude Time Distortion Channel 1 Output CH1 V/div Input Impedance CH1 Coupling Probe Atten Display Mode Averaging Time/div T...

To troubleshoot input and ADC failures Use this test to isolate input failures in two channel analyzers to the A1 Input assembly, A5 Analog assembly, or A12 BNC assembly. q Step 1. Check the input path. • Set the frequency synthesizer as follows: Frequency Amplitude Function 10 kHz 2 Vp-p Sine Wave ...

q Step 2. Check the dc offset DAC. • Using the BNC-to-SMB cable, connect the oscilloscope to A1 P200 to check channel 1 or to A1 P700 to check channel 2. If you changed the input signal or range, set the input signal to 2 Vp-p and the range to 1 Vpk. • Set the oscilloscope to 700 mV/div. • Press the...

To troubleshoot input failures on four channel analyzers Use this test to isolate the failure when one channel fails in a four channel analyzer. q Step 1. Run the input and quick confidence self tests. • Set the power switch to on ( l ). • When the power-up tests are completed, press the following k...

q Step 2. Exchange the Input assemblies. • Set the power switch to off ( O ). • Exchange the Input assembly in the lower slot with the Input assembly in the upper slot. • Reconnect the cables to the A5 Analog assembly. • Set the power switch to on ( l ). • Press the following keys: [ System Utility ...

To troubleshoot distortion failures Use this test to isolate distortion failures to the A1/A2 Input assembly, the A5 Analog assembly, or to mechanical failures. q Step 1. Check mechanical ground connections. • Check that the Digital assembly, Input assembly, and Analog assembly are completely in the...

To troubleshoot disk drive failures This test isolates disk drive failures to the A7 CPU, the A100 Disk Drive assembly, or the flexible disk. q Step 1. Check the disk controller on the A7 CPU assembly. • Press the following keys: [ System Utility ] [ MORE ] [ SELF TEST ] [ TEST LOG ] [ Rtn ] [ FUNCT...

q Step 3. Check that the Disk Drive assembly can read and write to all sectors of a flexible disk. The read/write self test can take up to 40 minutes to complete if there are no failures. • Press the [ READ/WRITE ALL ] softkey. • If the self test aborts and displays the message Bad or unformatted me...

To troubleshoot auto-range failures Use this test to check the auto-range and overload detector circuits on the A1/A2 Input assembly. This test assumes that calibration and all self tests passed. • Set the power switch to on ( l ). • Press the following keys: [ System Utility ] [ CALIBRATN ] [ AUTO ...

• Press the following keys: [ CHANNEL 1 ] [ CHANNEL 1 RANGE ] The range should be set to 5 dBVrms. • Press [ Rtn ]. • Repeat steps 5 and 6 for each channel. • If only one channel, or channel 1 and 3, or channel 2 and 4 are failing, the A1/A2 Input assembly is probably faulty. In the two channel anal...

To troubleshoot DIN connector failures Use this test to determine if the fuse for the DIN connector is failing before replacing the A10 Rear Panel assembly. • Set the power switch to on ( l ). • Check the voltage on pin 2 of the DIN connector for +5V. • If the voltage is correct, the A10 Rear Panel ...

To troubleshoot trigger failures Use this test when the trigger mode is suspected of failing or the Input Trigger self test fails on all channels. q Step 1. Check trigger modes. • Set the power switch to on ( l ). • Press the following keys: [ System Utility ] [ CALIBRATN ] [ AUTO CAL OFF ] [ Input ...

• Connect the frequency synthesizer to the analyzer’s rear panel EXT TRIG connector using a BNC cable. • Press the following keys allowing enough time for the analyzer to trigger before pressing the next key. Note which trigger modes are failing: [ CHANNEL 1 ] [ CHANNEL 2 ] [ CHANNEL 3 ] (option AY6...

q Step 2. Determine the probable faulty assembly or next step by comparing the trigger failure to the following table. If the trigger failure matches more than one entry in the table, use the entry closest to the beginning of the table. Trigger Mode Failing Probable FaultyAssembly or Next Step All c...

• If the signal at A5 TP 204 is toggling, the A6 Digital assembly is probably faulty. • If the signal at A5 TP 204 is not toggling, the A5 Analog assembly is probably faulty. Agilent 35670A Troubleshooting the Analyzer To troubleshoot trigger failures 4-65

q Step 4. Check external trigger signal to the Analog assembly. • Set the power switch to off ( O ). • Remove the seven screws holding the rear panel to the analyzer and lean the rear panel back until the A10 Rear Panel assembly is visible. Keep the cables connected. • Set the power switch to on ( l...

To troubleshoot memory battery failures Use this test when battery-backed-up memory is suspected of failing. This test separates Memory assembly failures from memory battery failures. • Press the following keys: [ Preset ] [ DO PRESET ] [ System Utility ] [ CLOCK SETUP ] [ DATE MMDDYY ] 010101 [ ENT...

To troubleshoot microphone power and adapter failures Use this test to isolate Microphone failures to the A5 Analog assembly or option UK4, Microphone Adapter and Power Supply. q Step 1. Check mic pwr on the analyzer’s front panel. • Set the power switch to on ( l ). • Check the voltage on pin 2 of ...

To troubleshoot tachometer failures Use this test to isolate tachometer failures to the A10 Rear Panel assembly or A6 Digital assembly. q Step 1. Check the rear panel tachometer input. • Set the power switch to off ( O ). • Remove the seven screws holding the rear panel to the analyzer and lean the ...

q Step 2. Check the tachometer range function. • Set the oscilloscope for 20 s/div. • Press the following keys: [ Rtn ] [ LOOP MODE OFF ] [ Rtn ] [ SERVICE TESTS ] [ SPCL TEST MODES ] [ SOURCE LEVEL ] [ Source ] [ SOURCE ON ] [ LEVEL ] 500 [ mVpk ] [ Trigger ] [ TACHOMETR SETUP ] [ TRG RANGE +/ − 20...

Adjusting the Analyzer This chapter contains the adjustment procedures for the Agilent 35670A Dynamic Signal Analyzer. Use these adjustments if the analyzer does not meet its specifications or if instructed in chapter 4, ‘’Troubleshooting the Analyzer,’’ or chapter 6, ‘’Replacing Assemblies,’’ to pe...

Safety Considerations Although the Agilent 35670A analyzer is designed in accordance with international safety standards, this guide contains information, cautions, and warnings that must be followed to ensure safe operation and to keep the unit in safe condition. Adjustments in this chapter are per...

Remote Operation Adjustments can be set up using the remote operation capability of the Agilent 35670A analyzer. The following table lists the adjustments and corresponding GPIB codes. See the Agilent 35670A GPIB Programmer’s Guide for general information on remote operation. Adjustment GPIB Code So...

To adjust the frequency reference This procedure adjusts the 19.923 MHz (or, to be exact, 19.922944 MHz) frequency reference circuit on the A7 CPU assembly. This circuit is the source of the timing reference for the A1/A2 Input and A5 Analog assemblies. Equipment Required: Frequency Counter 10:1 Osc...

To adjust the source This procedure adjusts the source dc offset on the A5 Analog assembly. Equipment Required: Multimeter BNC-to-Dual Banana Cable • Connect the multimeter to the analyzer’s rear-panel SOURCE connector. • Press the following keys: [ System Utility ] [ MORE ] [ SERVICE TESTS ] [ ADJU...

To adjust the ADC gain, offset and reference This procedure adjusts the second-pass gain, the first-pass offset, and the reference voltage for the ADC on the A5 Analog assembly. This prevents nonlinear Analog-to-Digital Converter (ADC) operation near the Digital-to-Analog Converter (DAC) transition ...

• Set the oscilloscope as follows: Channel 1 Volts/Div Offset Coupling 20 mV/div 0V 1 M Ω ac Channel 2 Volts/Div Offset Coupling 500 mV/div 0V1 M Ω ac Time Base Time/Div Sweep 1.0 ms/div Triggered Trigger Source Level Slope Mode Channel 2 500 mV Positive Edge Display Mode Averaging No. of Avg. Scree...

• Press the following keys: [ System Utility ] [ MORE ] [ SERVICE TESTS ] [ ADJUSTMTS ] [ ADC ADJUSTMNT ] [ OFFSET ] Wait for the analyzer to set up the adjustment. The analyzer is ready when the adjustment message appears on the screen. • If the oscilloscope display looks like the following figure,...

To adjust the input dc offset This procedure minimizes the residual dc response of the A1/A2 Input assemblies. The standard two channel analyzer has one A1 Input assembly. The optional four channel analyzer has two A2 Input assemblies: channel 1 and 3 are routed to the A2 Input assembly in the lower...

To adjust common mode rejection This procedure optimizes the common mode rejection of the A1/A2 Input assemblies. The standard two channel analyzer has one A1 Input assembly. The optional four channel analyzer has two A2 Input assemblies: channel 1 and 3 are routed to the A2 Input assembly in the lo...

To adjust filter flatness This procedure adjusts the anti-alias filter on the A1/A2 Input assemblies. The standard two channel analyzer has one A1 Input assembly. The optional four channel analyzer has two A2 Input assemblies: channel 1 and 3 are routed to the A2 Input assembly in the lower slot and...

To adjust the display voltage This procedure adjusts the A102 DC-DC Converter assembly’s display voltage to match the voltage required by the A101 Display assembly. This adjustment is only required when the DC-DC Converter assembly or the Display assembly is replaced. Equipment Required: Multimeter ...

Replacing Assemblies This chapter tells you what to do before and after you replace an assembly and shows you how to disassemble the analyzer. Warning Disconnect the power cord from the rear panel before disassembly or assembly of the Agilent 35670A.Even with power removed, there can be sufficient s...

What to do before replacing the CPU assembly The analyzer’s serial number and firmware options are stored in EEPROM (U27) on the A7 CPU assembly. Before replacing the CPU assembly, remove A7 U27 from the faulty assembly and insert into the new assembly. Caution All firmware options will be lost if A...

What to do after replacing an assembly • Reinstall all assemblies and cables that were removed during troubleshooting. • Do the required adjustments listed in the following table. • Do the self test, page 4-31. • Do the required performance tests listed in the following table. Assembly Replaced Requ...

To remove cover 1 Place the analyzer on its front panel. Using a 4 mm hex driver, loosen the four corner screws. 2 Slide the cover straight up. Replacing Assemblies Agilent 35670A To remove cover 6-6

To remove rear panel 1 Remove cover (see ‘’To remove cover’’). 2 Using a T-15 torx driver, remove the seven screws from the rear panel. Pull the rear panel straight off. 3 Disconnect the ribbon cable and the coaxial cable from the A10 Rear Panel assembly. Agilent 35670A Replacing Assemblies To remov...

To remove front panel 1 Remove cover (see ‘’To remove cover’’). 2 Remove assembly retainer bracket. 3 Slide A5 Analog assembly part way out and disconnect gray mic cable. 4 Using a T-15 torx driver, remove the two screws on each side of the front panel. Replacing Assemblies Agilent 35670A To remove ...

To remove disk drive 1 Remove cover (see ‘’To remove cover’’). 2 Disconnect the disk drive cable. 3 Using a T-10 torx driver, loosen the three screws at the back of the disk drive bracket. 4 Slide the disk drive back and lift up. Replacing Assemblies Agilent 35670A To remove disk drive 6-10

To remove CPU 1 Remove cover (see ‘’To remove cover’’). 2 Using a T-10 torx driver, remove the nine screws from the A7 CPU assembly. Lift the assembly up, unpluging the A7 CPU assembly from the A8 Memory assembly and A99 Motherboard. 3 Disconnect the ribbon cables from the A7 CPU assembly. 4 The ana...

To remove NVRAM 1 Remove A7 CPU assembly (see ‘’To remove CPU’’). 2 Using a T-10 torx driver, remove the four screws from the A9 NVRAM assembly. Replacing Assemblies Agilent 35670A To remove NVRAM 6-12

To remove memory 1 Remove A7 CPU assembly (see ‘’To remove CPU’’). Remove optional A9 NVRAM assembly (see ‘’To remove NVRAM’’). 2 Using a T-10 torx driver, remove the eight screws from the A8 Memory assembly. Agilent 35670A Replacing Assemblies To remove memory 6-13

To remove power supply 1 Remove rear panel (see ‘’To remove rear panel’’). 2 Disconnect the ribbon cable from the A98 Power Supply assembly. 3 Using a T-15 torx driver, remove the six screws from the A98 Power Supply assembly. 4 Set the front panel power switch in the off ( O ) position (switch in t...

To remove motherboard 1 Remove A98 Power Supply assembly (see ‘’To remove power supply’’). Remove A7 CPU assembly (see ‘’To remove CPU’’). 2 Disconnect the fan cable from the A99 Motherboard. 3 Remove assembly retainer bracket. 4 Unplug all assemblies from the A99 Motherboard. ) Replacing Assemblies...

To remove dc-dc converter 1 Remove front panel (see ‘’To remove front panel’’). Remove A7 CPU assembly (see ‘’To remove CPU’’). 2 Using a T-10 torx driver, remove the five screws from the front wall. 3 Using a T-10 torx driver, remove the four screws from the shield. Unplug ribbon cables. 4 Using a ...

Replaceable Parts This chapter contains information for ordering replacement parts for the Agilent 35670A Dynamic Signal Analyzer. Ordering Information Replacement parts are listed in the following ten tables: • Assemblies • Cables • Instrument Covers and Handles • Assembly Covers and Brackets • Fro...

Direct Mail Order System Within the U.S.A., Agilent Technologies can supply parts through a direct mail order system. Advantages of the Direct Mail Order System are: • Direct ordering and shipment from the Agilent Parts Center. • No maximum or minimum on any mail order. There is a minimum order for ...

Assemblies After replacing an assembly, see ‘’What to do after replacing an assembly’’ in chapter 6 for required adjustments and performance tests. The reference designator for the screws that fasten the A90 Fan assembly is MP600. The reference designator for the screws that fasten the A98 Power Sup...

Instrument Covers and Handles Ref Des Agilent Part Number CD Qty Description Mfr Code Mfr Part Number MP1 35670-64101 5 1 SHTF ASSY-COVER ALV 28480 35670-64101 MP2 5021-5483 4 2 COVER LATCHES 28480 5021-5483 MP4 5062-4806 9 1 MOLD BUMPER SET 4PC FF CORNRS 28480 5062-4806 MP10 35670-64102 6 1 IMPACT ...

Assembly Covers and Brackets Ref Des Agilent Part Number CD Qty Description Mfr Code Mfr Part Number MP100 35670-00605 0 1 SHTF SHIELD DISP PWR SUPPLY 28480 35670-00605 MP101 35670-01203 6 1 SHTF BRKT,PCB RETAINER 28480 35670-01203 MP102 35670-01204 7 1 SHTF BRACKET-FAN AL 28480 35670-01204 MP103 35...

Front Panel Parts The reference designator for the screws that fasten the bezel (MP208) to the front frame (MP201) is MP604. The reference designator for the nuts that fasten the A101 Display assembly to the front frame is MP611. The reference designator for the screws that fasten the front frame to...

Rear Panel Parts The reference designator for the screws that fasten the KEYBOARD connector and A10 Rear Panel assembly to the rear panel is MP601. The reference designator for the screws that fasten the rear panel to the chassis is MP603. Caution The POWER SELECT switch must be in the DC position (...

Chassis Parts Ref Des Agilent Part Number CD Qty Description Mfr Code Mfr Part Number MP400 35670-00101 1 1 SHTF-CHASSIS ASSY 28480 35670-00101 MP401 35670-00102 2 1 SHTF WALL ASSY FRONT 28480 35670-00102 MP402 35670-04103 1 2 INPUT BD INSULATOR 28480 35670-04103 MP403 35650-00601 2 1 SHTF CVR-SHLD ...

Screws, Washers, and Nuts Ref Des Agilent Part Number CD Qty Description Mfr Code Mfr Part Number MP600 0515-0374 4 16 SCREW-MACHINE ASSEMPLY M3 X 0.5 10MM-LG 28480 0515-0374 MP601 0515-0430 3 66 SCREW-MACHINE ASSEMPLY M3 X 0.5 6MM-LG 28480 0515-0430 MP602 0515-1940 2 4 SCR-MCH M2.5 6MMLG PHTX SST *...

Option UK4 Parts Agilent 35670A Replaceable Parts Option UK4 Parts 7-13

Circuit Descriptions This chapter contains the overall instrument description and individual assembly descriptions for the Agilent 35670A Dynamic Signal Analyzer. The overall instrument description lists the assemblies in the analyzer and describes the analyzer’s overall block diagrams. The assembly...

Overall Block Diagram The following figures show the overall block diagrams for both the two channel and the four channel analyzer. Each block in the diagrams represents a functional block in the analyzer. The assembly that performs the function is listed in the block. BNC Contains the BNC connector...

Secondary Keypad Consists of hardkeys and softkeys. Power Supply Supplies the dc voltages shown in the block diagram. See “Power Supply Voltage Distribution” in chapter 9 for additional information. Rear Panel Provides the interface for devices connected to its GPIB connector, parallel connector, se...

Four Channel Overall Block Diagram Agilent 35670A Circuit Descriptions Overall Instrument Description 8-5

A1 Input The A1 Input assembly is the input assembly for the two channel analyzer. The A1 Input assembly conditions the channel 1 and channel 2 input signals before they are sent to the analog-to-digital converter on the A5 Analog assembly. The A1 Input assembly sets the voltage ranges, conditions t...

A1 Input Block Diagram: Channel 1 Circuit Descriptions Agilent 35670A A1 Input 8-8

A1 Input Block Diagram: Channel 2 Circuit Descriptions Agilent 35670A A1 Input 8-10

A2 Input The A2 Input assembly is the input assembly for the four channel analyzer. The four channel analyzer contains two A2 Input assemblies. The A2 Input assembly connected to J1 on the Motherboard conditions the channel 1 and channel 3 input signals before they are sent to the analog-to-digital ...

A2 Input Block Diagram: Channel 1 or Channel 2 Circuit Descriptions Agilent 35670A A2 Input 8-14

A2 Input Block Diagram: Channel 3 or Channel 4 Circuit Descriptions Agilent 35670A A2 Input 8-16

A5 Analog Block Diagram: ADC and Trigger Agilent 35670A Circuit Descriptions A5 Analog 8-19

A5 Analog Block Diagram: Analog Source and Calibrator Agilent 35670A Circuit Descriptions A5 Analog 8-21

A6 Digital The A6 Digital assembly prepares the digital input data for the A7 CPU assembly. The Digital assembly also generates the digital source data for the A5 Analog assembly. The Digital assembly receives the input signals as 16-bit serial, digital data from the Analog assembly. The Digital ass...

A6 Digital Block Diagram Agilent 35670A Circuit Descriptions A6 Digital 8-23

A7 CPU Block Diagram Circuit Descriptions Agilent 35670A A7 CPU 8-26

A7 CPU Block Diagram: Interface Reset Logic Puts the analyzer into a known state. A reset occurs at power-up and power-down (PVALID from the A98 Power Supply assembly goes high), when the reset switch S2 (located on the CPU assembly) is pressed, or when a RESET instruction is executed. Agilent 35670...

PVALID from the power supply goes high when +5 volts reaches a valid level. The Reset Generator produces a 128 ms reset pulse when PVALID goes high and S2 is open, or when S2 is closed then opened and PVALID is high. At the end of the reset pulse, RSTn goes high, which terminates the reset and allow...

A8 Memory The A8 Memory assembly provides the A7 CPU assembly with ROM, dynamic RAM (DRAM), static RAM (SRAM), and a real-time clock. Memory Controller Provides the interface between the A7 CPU assembly and the Memory assembly for data transfer. FLASH ROM, DRAM, and SRAM Stores data in 32-bit words....

A9 NVRAM The optional A9 NVRAM assembly provides the A7 CPU assembly with additional nonvolatile RAM. Address Latch Holds the address from the processor address bus. This circuit latches the address when an address strobe occurs (BBASn goes low). Data Buffer Buffers the processor data bus. Address D...

A10 Rear Panel The A10 Rear Panel assembly contains the BNC connectors for the external trigger input, tachometer input, and source output. The Rear Panel assembly also contains DIN, GPIB, serial, and parallel interface connectors. In addition, the Rear Panel assembly provides the fan control for th...

A10 Rear Panel Block Diagram Circuit Descriptions Agilent 35670A A10 Rear Panel 8-34

A11 Keyboard Controller The A11 Keyboard Controller assembly together with the A13 Primary and A14 Secondary Keypad assemblies make up the front panel keyboard. This assembly provides the interface between the A7 CPU assembly and the keypads. Beeper Generates a tone when instructed by the A7 CPU ass...

A12 BNC The A12 BNC assembly connects the BNC connectors on the two channel analyzer’s front panel to their respective assembly. The Source BNC is connected to the A5 Analog assembly and the Channel 1 and Channel 2 BNCs are connected to the A1 Input assembly. In addition, this assembly provides RFI ...

A13 Primary Keypad The A13 Primary Keypad assembly contains the marker, display, numeric, and measurement keys for the two channel analyzer. The Primary Keypad assembly also contains the RPG and the LEDs that indicate a half range or overload condition on a channel. See ‘’A11 Keyboard Controller’’ f...

A90 Fan The A90 Fan assembly cools the analyzer. The A10 Rear Panel assembly controls the speed of the Fan assembly. As the temperature increases, the Rear Panel assembly increases the fan speed. As the temperature decreases, the Rear Panel assembly decreases the fan speed. The fan can also be turne...

A99 Motherboard The A99 Motherboard assembly provides a common point of contact for voltage and signal distribution. The Motherboard also buffers the external monitor signals and routes the buffered signals to the EXT MONITOR connector. See ‘’A99 Motherboard’’ in chapter 9 for a list of all signals ...

Option UK4 Microphone Adapter and Power Supply The optional Microphone Adapter and Power Supply provides four LEMO connectors with power for microphones. The input signal from each LEMO connector is routed to a BNC connector. BNC cables then connect the input signals to the analyzer’s input channels...

Option UK4 Microphone Adapter and Power Supply Block Diagram Agilent 35670A Circuit Descriptions Option UK4 Microphone Adapter and Power Supply 8-41

Voltages and Signals This chapter shows where the signals and voltages are used in the analyzer and describes each signal. The signals are described in groups as shown in the following table. Section Title Describes signals routed ... A1 Input through SMB cables from A1 Input to A5 Analog A2 Input t...

Assembly Locations and Connections Assembly Locations Agilent 35670A Voltages and Signals Assembly Locations and Connections 9-3

Assembly Connections for Two Channel Analyzer Voltages and Signals Agilent 35670A Assembly Locations and Connections 9-4

Assembly Connections for Four Channel Analyzer Agilent 35670A Voltages and Signals Assembly Locations and Connections 9-5

Power Supply Voltage Distribution The following table shows the power supply voltages used by each assembly in the analyzer. In addition, the table also shows the path taken by these voltages. Some assemblies use the power supply voltages as supplied by the Power Supply assembly. However, most assem...

A1 Input Analyzers with only two channels contain one A1 Input assembly. The A1 Input assembly conditions both input signals. After the signals are conditioned by the Input assembly they are routed through SMB cables to the A5 Analog assembly. The signal from A1 P200 to A5 P4 is C1AAFO (Channel 1 An...

A9 NVRAM The following table lists signals routed between the optional A9 NVRAM assembly and the A8 Memory assembly. This table shows several things — if the assembly generates or uses the signal or voltage, and if a signal is bidirectional. A description of each signal follows the table. Signal Nam...

A10 Rear Panel This section describes the signals at the A10 Rear Panel assembly’s interface connectors and input connectors. The signals are described in the following order: GPIB Serial Port Parallel Port DIN Keyboard Source Output Tachometer Input External Trigger Input GPIB The following table l...

DIO1 — DIO8 Data Input/Output — These are inverted data lines that conform to IEEE specification IEEE-488. When ATN is low, these lines contain interface commands. When ATN is high, these lines contain data. EOIn End or Identify — If ATN is high, a low on this line marks the end of a message block. ...

Parallel Port The Parallel Port is a 25-pin, Centronics port. The Parallel Port can interface with printers or plotters. The following table lists signals at the Parallel Port connector (A10 J100). A description of each signal follows the table. Signal Name Pin ACKn 10 BUSY 11 FAULTn 15 IPn 16 PA0 2...

DIN Keyboard The following table lists signals at the DIN keyboard connector (A10 P200). A description of each signal follows the table. Signal Name Pin KEYCLK 1 KEYDAT 3 +5 V 4 Logic Gnd 2 Not Used 5 KEYCLK Key Board Clock — This clock synchronizes the transfer of keyboard data from the external ke...

A12 BNC The A12 BNC assembly is only used in two channel analyzers. The A12 BNC assembly routes the signals connected to the Channel 1 BNC connector and Channel 2 BNC connector to the A1 Input assembly. The A12 BNC assembly also routes the source signal from the A5 Analog assembly to the Source BNC ...

A22 BNC The A22 BNC assembly is only used in four-channel analyzers. The A22 BNC assembly routes the signals connected to the Channel 1 BNC connector and Channel 3 BNC connector to the A2 Input assembly connected to J1 on the Motherboard. The A22 BNC assembly also routes the signals connected to the...

A99 Motherboard The following table lists all signals routed through the Motherboard. The table uses bold face type to show which assembly can generate the signal. A description of each signal follows the ‘’Motherboard Voltages’’ table. Signal Name Assembly Using Signal A1/A2 A2 A5 A6 A7 A10 A90 A98...

Internal Test Descriptions This chapter describes the power-on test, calibration routine, fault log messages, and self tests. This chapter also contains a list of the GPIB commands for each self test. Power-on Test Description The power-on test is run when the analyzer is powered up. The calibration...

Power-on Test Messages The ‘’Power-on Test Messages’’ table provides additional information for interpreting the power-on test LEDs. Using the ‘’Binary to Hexadecimal’’ table, translate the power-on test LEDs to their equivalent hexadecimal code (see ‘’To troubleshoot power-up failures’’ on page 4-1...

Calibration Routine Description The calibration routine consists of a dc-offset calibration and a frequency calibration. The calibration routine occurs immediately following the power-on tests and periodically afterwards to compensate for any drift. The calibration routine sets the input relays to d...

DC-Offset Tables and Frequency Correction Curves The dc-offset calibration builds 5 dc-offset tables — one for each anti-alias filter and one for each channel when the anti-alias filters are bypassed. The values in the dc-offset tables are sent to the channel dc-offset DACs to compensate for dc offs...

Calibration Error Messages The dc-offset tables and frequency correction curves produced by the calibration routine are compared with a set of maximum allowable error curves. The Quick Confidence self test runs the calibration routine and places error messages in the Test Log if any measurement exce...

Fault Log Messages 0 Unknown Fault This error message occurs when the fault could not be determined. 1 I2C: Timeout This error message occurs if the A7 CPU assembly’s IIC controller takes too long to tell the MPU that it is ready for a new command. 2 I2C: No Device Acknowledge This error message occ...

Self-Test Descriptions Thirty-seven self tests are available that can be run in groups or individually. The following table lists the group of self tests that are run when you select [ FUNCTIONL TESTS ], [ ALL ]. This group does not include any of the self tests that require a formatted flexible dis...

Functional Tests All Self-Test Group Softkey Self Test Name Assembly A7 A8 A6 A12/ A22 A1 A2 A5 A10 A11 A100 [ INTERRUPT ] Interrupt X 0 [ MULTI FCTN PERIPHERL ] † Multi Fctn Peripheral X 0 [ FRONT PANEL ] † Front Panel X 0 X [ GPIB FUNC TEST ] GPIB X 0 [ DISK CONTROLLR ] Disk Controller X 0 [ DISK ...

Self Tests that Perform a Measurement The following self tests perform measurements: Self Test Front Panel Softkey Baseband [ BASEBAND ] Zoom [ ZOOM ] Source thru DSP [ DGTL SRCE THRU DSP ] ADC gate array [ ADC GATE ARRAY ] Source to CPU [ SOURCE TO CPU ] Source with LO [ WITH LO ] Source Without LO...

Individual Self-Test Descriptions [ AAF BYPASS ] This test verifies that the anti-alias filters and the bypass circuits on the A1 Input assembly or A2 Input assemblies are operating correctly. In this test, the A5 Analog assembly’s source outputs a signal that is connected to the input channels via ...

Self-Test Menu Map and GPIB Commands The analyzer’s self tests can be run from the front panel or by a controller via GPIB. To run a test from the front panel, press [ System Utility ] followed by the appropriate softkey in the table. To run a test via GPIB, send the equivalent GPIB command (to abor...

A2 Input Block Diagram: Channel 1 or Channel 3 Quick Reference Agilent 35670A 12-12

A2 Input Block Diagram: Channel 2 or Channel 4 Quick Reference Agilent 35670A 12-14

A8 Memory Block Diagram Quick Reference Agilent 35670A 12-22

Index A A-weight filter test 3-20 ac power cables 2-4 consumption 2-2 select switch 2-5 accessories vi ADC adjustments 5-7 circuit description 8-18 gate array self-test 10-13 adjustments GPIB commands for 5-4 required after replacing assembly 6-4 warm up time 5-2 amplitude accuracy test 3-17 lineari...

part number 7-5 fast bus interface 8-28 self-test description 10-14 troubleshooting 4-29 fault log messages 10-9 FIFO gate array self test 10-14 flatness adjustment 5-17 test 3-18 frequency accuracy test 3-22 frequency reference adjustment 5-5 circuit description 8-24 clock 8-25 front panel ii part ...

Q quick confidence self test 10-16 R random seek self test 10-16 read self test 10-16 read/write self test 10-16 rear panel iv connectors 8-33 part numbers 7-10 removing 6-7 rear panel assembly circuit description 8-4, 8-33 part number 7-5 procedures required after replacing 6-5 signal descriptions ...

Guide to Agilent 35670A Documentation If you are thinking about... And you want to... Then read... ♦ Unpacking and installing the Agilent 35670A Install the Agilent 35670A Dynamic Signal Analyzer Agilent 35670A Installation and Verification Guide Do operation verification or performance verification...

About this edition October 2000: Rebranded for Agilent Technologies February 1995: In Replaceable Parts , page 7-5, three corrections were made to the replaceable parts list. July 1994: Previous edition.