Agilent E1445A - Manuals

DECLARATION OF CONFORMITY According to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Revision: B.01 Issue Date: 1 June 2001 Document E1445A.DOC Manufacturer’s Name: Agilent Technologies, Incorporated Manufacturer’s Address: 815 – 14 th St. SW Loveland, Colorado 80537USA Declares, that the product Produc...

Chapter 1 General Information Introduction This manual contains information required to test, troubleshoot, and repairthe Agilent E1445A C-Size VXI Arbitrary Function Generator (AFG). Seethe Agilent E1445A User’s Manual for additional information. Figure 1-1shows the Agilent E1445A. This chapter inc...

SafetyConsiderations This product is a Safety Class I instrument that is provided with a protectiveearth terminal when installed in the mainframe. The mainframe, AFG, andall related documentation should be reviewed for familiarization with safetymarkings and instructions before operation or service....

Inspection/Shipping This section describes initial (incoming) inspection and shipping guidelinesfor the AFG. Initial Inspection Use the steps in Figure 1-2 as guidelines to perform initial inspection of the AFG. WARNING To avoid possible hazardous electrical shock, do not performelectrical tests if ...

Environment The recommended operating environment for the Agilent E1445A AFG is: Environment Temperature Humidity Operating 0 o C to +55 o C <65% relative (0 o C to +40 o C) Storage andShipment -40 o C to +75 o C <65% relative (0 o C to +40 o C) AFG Description The Agilent E1445A Arbitrary Fun...

Chapter 2 Verification Tests Introduction The three levels of test procedures described in this chapter are used toverify that the Agilent E1445A: • is fully functional (Functional Verification) • meets selected testable specifications (Operation Verification) • meets all testable specifications (Pe...

Command Coupling Many of the AFG SCPI commands are value-coupled. In order to prevent"Settings Conflict" errors, coupled commands must be sent contiguously byplacing them in the same program line, or by suppressing the end-of-lineterminator. (For more information on command coupling and synt...

Functional Verification: Ref In/Marker Out Test Description The purpose of this test is to check the Ref/Sample In and Marker Out ports.An external reference is connected to the Ref/Sample In port and sent to theMarker Out port. Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus re...

Functional Verification: Start Arm In Test Description The purpose of this test is to check the Start Arm In port. The "TRIG OUT"port of the Command Module is used to send a Start Arm signal to the AFG. Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Set up ...

Functional Verification: Start Arm In Test (cont’d) Test Procedure(cont’d) 4. Set up the AFG to output a 1 MHz sinewave, with an external StartArm source: FREQ 1E6; Set freq to 1 MHz :VOLT 4VPP Set AFG amplitude ARM:LAY2:SOUR EXT External Start Armsource INIT:IMM Initiate 5. Verify that no signal ap...

Functional Verification: Gate In Test Description The purpose of this test is to check the gating function. The "TRIG OUT"port of the Command Module is used to gate the output. Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Set up the equipment as shown in ...

Functional Verification: Gate In Test (cont’d) Test Procedure(cont’d) 4. Set up the AFG to output a 1 MHz sinewave with an external gatesource: TRIG:GATE:SOUR EXT; External gate source :TRIG:GATE:STAT ON; Enable gate :FREQ 1E6; Set freq to 1 MHz :VOLT 4VPP Set AFG amplitude INIT:IMM Initiate 5. Send...

Functional Verification: Output Relay Test Description The purpose of this test is to check the output relay. Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Set up equipment as shown in Figure 2-4: 3. Set up the AFG to output a 1 MHz sinewave: FREQ 1E6; Set freq to...

Functional Verification Example Program This program performs the Functional Verification Tests for the AFG. An Agilent E1405/E1406 CommandModule is required for this test. 10! RE-STORE "FUNC_TEST"20 COM @Afg,@Cmd_mod,INTEGER Done30 !40 !---------- Set up I/O paths ----------50 ASSIGN @Afg T...

Functional Verification Example Program (cont’d) 890 Reset_afg900 !910 CLEAR SCREEN920 PRINT "REF IN/MARKER OUT TEST"930 PRINT 940 !950 !Test connections960 PRINT "Connect Scope to ’Marker Out’ on the E1445A."970 PRINT "Connect Command Module ’Clk Out’ to ’Ref/Sample In’ on the E...

Functional Verification Example Program (cont’d) 1760 REPEAT1770 OUTPUT @Cmd_mod;"OUTP:EXT:LEV 1"1780 WAIT 11790 OUTPUT @Cmd_mod;"OUTP:EXT:LEV 0"1800 WAIT 11810 UNTIL Done1820 OFF KBD1830 SUBEND1840 !1850 SUB Output_relay1860 COM @Afg,@Cmd_mod,INTEGER Done1870 !1880 Reset_afg1890 !19...

OperationVerification Operation Verification is a subset of the Performance Verification tests thatfollow. For the AFG, Operation Verification consists of the following tests: • DC Accuracy • AC Accuracy • Total Harmonic Distortion PerformanceVerification The procedures in this section are used to t...

Test 2-1: DC Zeros Description The purpose of this test is to verify that the AFG meets its specifications forDCV accuracy for an output of zero volts. An arbitrary waveformconsisting of zeros is used. The amplitude is varied in order to test eachattenuator. Equipment Setup • Connect equipment as sh...

Test 2-1: DC Zeros (cont’d) Test Procedure(cont’d) 3. Create a user-defined waveform made up of zeros: LIST:SEGM:SEL ZEROS Select segment name LIST:SEGM:DEF 8 # of segment points LIST:SEGM:VOLT 0,0,0,0,0,0,0,0 Segment list LIST:SSEQ:SEL DC_ZEROS Select sequence name LIST:SSEQ:DEF 1 # of segments LIS...

Test 2-1: DC Zeros (cont’d) Example Program This program performs the DC Zeros test. An arbitrary waveform, consisting of zeros, is used with variousamplitudes to test a variety of attenuator and filter combinations. 10! RE-STORE "DC_ZEROS"20 COM @Afg30 DIM Attn(1:9),Vout(1:9)40 !50 !-------...

Test 2-2: DC Accuracy Description The purpose of this test is to verify that the AFG meets its specifications forDC accuracy. Equipment Setup • Connect equipment as shown in Figure 2-5 • Set DMM to DCV, autorange Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Set u...

Test 2-2: DC Accuracy (cont’d) Test Procedure(cont’d) Table 2-2. DC Accuracy Test Points Amplitude (volts) Filter Test Limits (volts) 10.2375 5.00.0 -5.0 -10.24 10.2375 -10.24 10.2375 -10.24 NoneNoneNoneNoneNone 250 kHz250 kHz 10 MHz10 MHz 10.2375 ± 0.0512 5.0 ± 0.0355 0.0 ± 0.0205 -5.0 ± 0.0355 -10...

Test 2-3: DC Offset (cont’d) Test Procedure(cont’d) Perform steps 5 - 7 for each offset listed in Table 2-3: 5. If necessary, change the AFG output amplitude: VOLT:OFFS 0; Set offset to 0 :VOLT <amplitude> Set amplitude where <amplitude> is the value specified in Table 2-3. 6. Set AFG of...

Test 2-3: DC Offset (cont’d) Example Program This program performs the DC Offset Test. 10! RE-STORE "DC_OFFSET"20 COM @Afg30 DIM Offset(1:6)40 !50 !---------- Set up I/O path and reset AFG ----------60 ASSIGN @Afg TO 70910 !AFG I/O path 70 OUTPUT @Afg;"*RST;*CLS" !Reset AFG 80 !90 !-...

Test 2-4: AC Accuracy Description The purpose of this test is to verify that the AFG meets its specifications forAC accuracy at 1 kHz. Equipment Setup • Connect equipment as shown in Figure 2-5 • Set DMM to ACV, autorange Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers...

Test 2-4: AC Accuracy (cont’d) Test Procedure(cont’d) 4. Set the AFG output amplitude: VOLT <amplitude>VRMS Set amplitude where <amplitude> is the value specified in Table 2-4. 5. Trigger the DMM and record the reading. Table 2-4. AC Accuracy Test Points Amplitude (volts rms) Filter Test...

Test 2-4: AC Accuracy (cont’d) Example Program This program performs the AC Accuracy Test. 10! RE-STORE "AC_LEVELS"20 DIM Vout(1:9),Filter(1:9)30 !40 !---------- Set up I/O path and reset AFG ----------50 ASSIGN @Afg TO 7091060 OUTPUT @Afg;"*RST;*CLS" !Reset AFG 70 !80 !---------- In...

Test 2-5: AC Flatness - 250 kHz Filter Description The purpose of this test is to verify that the AFG meets its specifications forAC flatness with the 250 kHz filter enabled. Equipment Setup • Connect equipment as shown in Figure 2-6 • Set DMM to ACV, autorange Test Procedure 1. Reset the AFG: *RST;...

Test 2-5: AC Flatness - 250 kHz Filter (cont’d) Test Procedure(cont’d) 3. Set the AFG output to the reference frequency (1 kHz): FREQ 1000 Set frequency 4. Measure the amplitude with the DMM and convert the reading todBm. Note the result for use in step 6: Reference Level ( dBm ) = 20 × log ï Readin...

Test 2-5: AC Flatness - 250 kHz Filter (cont’d) Test Procedure(cont’d) Table 2-5. AC Flatness Test Points - 250 kHz Filter Frequency (Hz) Test Limits* ± (dB error) Frequency (Hz) Test Limits* ± (dB error) 10E320E330E340E350E360E370E380E390E3 100E3110E3120E3130E3 0.05 dB0.05 dB0.05 dB0.05 dB0.05 dB0....

Test 2-6: AC Flatness - 10 MHz Filter Description The purpose of this test is to verify that the AFG meets its specifications forAC flatness with the 10 MHz filter enabled. Equipment Setup • Connect equipment as shown in Figure 2-6 • Set DMM to ACV, autorange Test Procedure 1. Reset the AFG: *RST;*C...

Test 2-6: AC Flatness - 10 MHz Filter (cont’d) Test Procedure(cont’d) 7. Set up the Power Meter: Units - WattsPower Range - autoReference Oscillator - ON NOTE Follow the Power Meter manufacturer’s instructions for performing anautocalibration and correcting for the power sensor. 8. Connect the equip...

Test 2-7: Frequency Accuracy Description The purpose of this test is to verify that the AFG meets its specifications forfrequency accuracy. Equipment Setup • Connect equipment as shown in Figure 2-8 • Set Counter to: Frequency, 50 Ω input impedance Test Procedure 1. Reset the AFG: *RST;*CLS Reset AF...

Test 2-7: Frequency Accuracy (cont’d) Test Procedure(cont’d) 3. Set reference oscillator to INT1 or INT2, as specified in Table 2-7: ROSC:SOUR INT1 Set ref osc to INT1 or ROSC:SOUR INT2 Set ref osc to INT2 4. Set marker source to "ROSC" or "TRIG", as specified in Table 2-7: MARK:FEED...

Test 2-7: Frequency Accuracy (cont’d) Test Procedure(cont’d) Table 2-7. Frequency Accuracy Test Points Ref Oscillator Source Marker Source Squarewave Frequency (Hz) Test Limits (Hz)* INT1INT2INT2INT2INT2 "ROSC""ROSC""TRIG""TRIG""TRIG" --------------------5.0 E...

Test 2-8: Duty Cycle Description The purpose of this test is to verify that the AFG meets its specifications forsquare wave duty cycle. Duty cycle is determined by measuring positivepulse width. Equipment Setup • Connect equipment as shown in Figure 2-9 • Set Counter to: Pulse Width, DC coupling, 50...

Test 2-8: Duty Cycle (cont’d) Test Procedure(cont’d) 4. Set the AFG frequency range as specified in Table 2-8: FREQ:RANG MAX Enable doubling or FREQ:RANG MIN Disable doubling 5. Set AFG output frequency: FREQ <frequency> Set frequency where <frequency> is the value specified in Table 2-8...

Test 2-8: Duty Cycle (cont’d) Example Program This program performs the Duty Cycle Test. 10! RE-STORE "DUTY_CYCLE"20 DIM Freq(1:4),Range$(1:4)[10]30 !40 !---------- Set up I/O path and reset AFG ----------50 ASSIGN @Afg TO 7091060 OUTPUT @Afg;"*RST;*CLS" !Reset AFG 70 !80 !----------...

Test 2-9: Total Harmonic Distortion Description The purpose of this test is to verify that the AFG meets its specifications forsine wave total harmonic distortion (THD). Equipment Setup • Connect equipment as shown in Figure 2-10 • Set Spectrum Analyzer to: Ref Level = 25 dBmFreq Span = 1 kHzResolut...

Test 2-9: Total Harmonic Distortion (cont’d) Test Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Set the AFG to output a sinewave with the 10 MHz filter enabled: VOLT 24DBM Set AFG amplitude OUTP:FILT:FREQ 10 MHZ Set filter to 10 MHz OUTP:FILT ON Enable filter INIT:IMM ...

Test 2-9: Total Harmonic Distortion (cont’d) Test Procedure(cont’d) Table 2-9. THD Test Points Frequency (Hz) Test Limits* (dBc) 100 E3250 E31 E64 E610 E6 -60-60-48-36-36 * Through 9th harmonic Example Program This program performs the Total Harmonic Distortion Test. 10 ! RE-STORE "SINE_THD"...

Test 2-9: Total Harmonic Distortion (cont’d) Example Program (cont’d) 600 !Measure harmonics 2-9610 Sum_amp_sqr=0620 FOR Harmonic=2 TO 9630 GOSUB Meas_amp640 Sum_amp_sqr=Sum_amp_sqr+10^(Result/10) !Sum of squared voltages 650 NEXT Harmonic660 !670 Thd=20*LGT(SQRT(Sum_amp_sqr)) !Calculate THD In dBc ...

Test 2-10: Spurious/Non-Harmonic Distortion Description The purpose of this test is to verify that the AFG meets its specifications fornon-harmonic and spurious distortion. Equipment Setup • Connect equipment as shown in Figure 2-9 • Set Spectrum Analyzer to : Ref Level = -5 dBmResolution BW = 3 kHz...

Test 2-10: Spurious/Non-Harmonic Distortion (cont’d) Test Procedure(cont’d) Perform steps 3 and 4 for each frequency range listed in Table 2-10: 3. Set the Spectrum Analyzer start frequency and stop frequency to thevalues listed in Table 2-10. 4. Measure the amplitude (in dBm) of the highest peak. S...

Performance Test Record Table 2-11, Performance Test Record for the Agilent E1445A AFG, is aform you can copy and use to record performance verification test resultsfor the AFG. Table 2-11 shows AFG accuracy, measurement uncertainty,and test accuracy ratio (TAR) values. AFG Test Limits Test limits a...

Test Accuracy Ratio (TAR) Test Accuracy Ratio (TAR) for the E1445A is defined as: AFGAccuracy/Measurement Uncertainty, i.e., TAR = Maximum − Expected Reading Measurement Uncertainty For single-sided measurements, Test Accuracy Ratio is not defined, so ’NA’(Not Applicable) will appear in the TAR colu...

Table 2-11. Performance Test Record for the Agilent E1445A (Page 2 of 7) Model _____________________________ Report No. ____________________________ Date _______________ Test Equipment Used: Description Model No. Trace No. Cal Due Date 1. _______________________________ 2. __________________________...

Chapter 3 Adjustments Introduction The procedures in this chapter show how to perform the followingelectronic adjustments for the AFG: • DC Accuracy • AC Flatness (250 kHz and 10MHz filters) • Skew NOTE The DC adjustment procedure should be performed before the AC flatnessadjustment procedures. Requ...

Defeating Calibration Security If the calibration security code is unknown, the security feature can bedefeated by disassembling the AFG and moving the jumper on connectorJ104 (see Figure 3-1) to the unsecured position (left-most pins). To preventaccidental or unauthorized calibration, move the jump...

DC Adjustment Procedure Description A DC adjustment is performed on the AFG by reading a series of voltages andresistances output by the AFG, then entering those values back into the AFG.After all measurements have been completed, new calibration constants arecalculated and stored in non-volatile me...

DC Adjustment Procedure (cont’d) Adjustment Procedure 1. Reset the AFG: *RST;*CLS Reset AFG and clearstatus registers 2. Enable calibration on the AFG: CAL:SEC:STAT OFF, <security code> Cal security off where <code> is the AFG’s security code (factory-set to "E1445A"). 3. Send th...

DC Adjustment Procedure (cont’d) Test Procedure(cont’d) 5. Trigger the DMM and note the reading. 6. Send the reading to the AFG: CAL:DC:POINT? <reading> where <reading> is the DMM reading from step 5. The AFG willreturn, in order, the number of the current cal point and an error code.Any...

DC Adjustment Procedure (cont’d) Example Program 10 ! RE-STORE "DC_ADJUST"30 !This program performs the firmware-guided DC adjustment procedure40 !for the E1445A Arbitrary Function Generator. An 3458A DMM50 !is required.60 !70 DIM Results(1:44)80 INTEGER Cal_point,Max_cal_point,Problem,Err_n...

DC Adjustment Procedure (cont’d) Example Program (cont’d) 900 CASE =31 !Cal point 31 910 OUTPUT @Dmm;"RANGE 10"920 CASE =33 !Cal point 33 930 OUTPUT @Dmm;"RANGE .1"940 CASE =41,=43 !Cal point 41,43 950 OUTPUT @Dmm;"FUNC DCV;RANGE .1"960 GOSUB Read_dmm !Read voltage - this wil...

AC Flatness Adjustment Procedure - 250 kHz Filter Description This procedure adjusts the AC calibration constants for the 250 kHz filter.The AC Flatness Test for the 250 kHz filter (see Chapter 2) is performedwith AC corrections disabled. The results are used to calculate newcalibration constants, w...

AC Flatness Adjustment Procedure - 10 MHz Filter Description This procedure adjusts the AC calibration constants for the 10 MHz filter.The AC Flatness Test for the 10 MHz filter (see Chapter 2) is performedwith AC corrections disabled. The results are used to calculate newcalibration constants, whic...

AC Flatness Adjustment Procedure - 10 MHz Filter (cont’d) Adjustment Procedure(cont’d) NOTE Rev A.02.00 (use the *IDN? command to determine the firmware revision)allows the 10 MHz filter to be replaced with a filter that has a lower cutofffrequency (the 10 MHz filter must be replaced at the factory)...

AC Flatness Adjustment Procedure (cont’d) Example Program 10! RE-STORE "AC_FLAT"30 !This program performs the AC flatness adjustment procedure for40 !the E1445A Arbitrary Function Generator. An 3458A DMM50 !and an Agilent 8902A Measuring Receiver are required.60 !70 !To perform the flatness ...

AC Flatness Adjustment Procedure (cont’d) Example Program (cont’d) 830 OUTPUT @Afg;"FUNC SIN;"; !Sine 840 OUTPUT @Afg;":VOLT "&VAL$(Ampl_dbm)&"DBM;"; !Set amplitude850 OUTPUT @Afg;":OUTP:LOAD 50 !50 ohm load 860 OUTPUT @Afg;"CAL:STATE:AC "&VAL$(Mode$=&...

Skew DAC Adjustment Procedure Description This procedure compensates for time delays between the AFG’s two DACs.The skew setting which produces the lowest second harmonic amplitude isfound and loaded into non-volatile memory. Equipment Setup • Connect the equipment as shown in Figure 3-3 • Set up th...

Skew DAC Adjustment Procedure (cont’d) Adjustment Procedure (cont’d) 2. Set up the AFG to output an 11 dBm, 4 MHz sinewave: FUNC SIN;:VOLT 11 DBM;:FREQ 4E6INIT:IMM 3. Load an initial value of 128 into the delay DAC: DIAG:POKE #HE0000B,8,2DIAG:POKE #HE0000D,8,128DIAG:POKE #HE0000B,8,7DIAG:POKE #HE000...

Chapter 4 Replaceable Parts Introduction This chapter contains information for ordering replaceable parts for theAgilent E1445A AFG. Exchange Assemblies Table 4-1 lists assemblies that may be replaced on an exchange basis(NEW/EXCHANGE ASSEMBLIES). Exchange assemblies are availableonly on a trade-in ...

Table 4-1. Agilent E1445A Replaceable Parts Reference Designator Part Number Qty Part Description Mfr. Code Mfr. Part Number NEW/EXCHANGE ASSEMBLIES ME1445A 1 E1445A (NEW) 28480 ME1445A E1445-66201 1 E1445A (EXCHANGE) 28480 E1445-66201 MECHANICAL PARTS HDL1 E1400-45102* 1 HANDLE-BOTTOM METAL INJECTI...

Chapter 5 Service Introduction This chapter contains service information for the Agilent E1445A AFG,including troubleshooting guidelines and repair/maintenance guidelines. WARNING Do not perform any of the service procedures shown unlessyou are a qualified, service-trained technician, and have readt...

TroubleshootingTechniques To troubleshoot an Agilent E1445A problem, you should first identify theproblem, and then isolate the cause to a user-replaceable part. Identifying the Problem AFG problems can be divided into three general categories: • Operator errors • Catastrophic failures • Performance...

Checking for Heat Damage Inspect the AFG for signs of abnormal internally generated heat such asdiscolored printed circuit boards or components, damaged insulation, orevidence of arcing. If there is damage, do not operate the AFG until youhave corrected the problem. Checking Switches/Jumpers Verify ...

Removing BNC Connectors Use the following steps to remove the AFG front panel BNC connectors(refer to Figure 5-2): 1. Unsolder wires 2. Remove the two T8 torx screws 3. Remove the BNC connector 4. Reverse the order to reinstall the connector Figure 5-2. Removal of BNC Connectors 124 Service Agilent ...

Repair/MaintenanceGuidelines This section provides guidelines for repairing and maintaining the AgilentE1445A AFG, including: • ESD precautions • Soldering printed circuit boards • Post-repair safety checks ESD Precautions Electrostatic discharge (ESD) may damage static sensitive devices in theAgile...