Agilent 2 - Manual

1-2 Installation Installation Installation Agilent 83491/2/3A modules require that firmware revision A.06.25 or later be installed in the Agilent 83480A. If you wish to install the module in an Agilent 54750A digitizing oscilloscope, you must first install the Agilent 83480K communications firmware ...

1-3 Installation Installation To install the module 1 Verify that all system components ordered have arrived by comparing the shipping forms to the original purchase order. Inspect all shipping containers. The shipment includes: ❒ An Agilent 83491/2/3A Clock Recovery Module ❒ Fiber-optic adapter cab...

1-4 Installation Installation Figure 1-2. Position of modules in the mainframe 3 Clean all optical interfaces as described in “Cleaning Connections for Accurate Measurements” on page 4-10 , before making measurements . 4 Perform the following steps if you’re installing an Agilent 83492/3A module: a ...

1-5 Installation Installation Figure 1-3. The adapter cable C A U T I O N Agilent 83491A Modules: Maximum safe signal input level is ±5V. The input circuits can also be damaged by electrostatic discharge (ESD). Before connecting any coaxial cable to the connectors, momentarily short the center and o...

1-7 Installation Installation To connect cables to an Agilent 83492A On Agilent 83492A modules, the front-panel fiber-optic connectors reverse input and output roles depending on the wavelength of the signal. Signals in the 750 nm to 860 nm wavelength range are input to the left connector and output...

2 Agilent 83491/2/3A Modules—At a Glance 2-2 Front-Panel Features 2-4 Block Diagrams 2-7 To Display a Signal 2-8 To Compensate for Module Insertion Loss 2-9 Using Probes with an Agilent 83491A 2-10 To compensate for a passive probe 2-11 To compensate an Agilent 54701A active probe 2-11 To compensate...

2-2 Operation Agilent 83491/2/3A Modules—At a Glance Agilent 83491/2/3A Modules—At a Glance The Agilent 83491/2/3A are designed to operate in an Agilent 83480A digital communications analyzer. These modules recover clock and data information at standard telecom and datacom rates. The resulting trigg...

2-4 Operation Front-Panel Features Front-Panel Features Figure 2-2. Agilent 83491/2/3A front panels SELECT key Pressing this key changes the modulation rate of the input signal. The recov-ered and retimed clock trigger is sent to the mainframe. The Trigger On Data selection is a bypass mode where th...

2-5 Operation Front-Panel Features UNLOCKED indicator This light shows when clock recovery cannot be established on the signal. If a clock rate is selected, the trigger output to the mainframe is disabled to pre- vent free-run triggering. However in bypass mode ( Trigger On Data selected), triggerin...

2-6 Operation Front-Panel Features Recovered Clock The recovered clock signal is routed directly to the Agilent 83480A mainframe through the module’s rear panel. This output has a lower jitter modulation bandwidth than the front-panel CLOCK Auxiliary Output . Because of the reduced jitter modulation...

2-7 Operation Block Diagrams Block Diagrams Figure 2-3. Agilent 83491A Block Diagram Figure 2-4. Agilent 83492A and 83493A Block Diagram

2-8 Operation To Display a Signal To Display a Signal 1 Install the module as described in “To install the module” on page 1-3. Be sure to connect all of the cables as described in the procedure. 2 Repeatedly press the SELECT key on the clock recovery module until the front- panel light indicates th...

2-9 Operation To Compensate for Module Insertion Loss To Compensate for Module Insertion Loss The following steps allow you to enter an offset to compensate for the inser-tion loss of the clock recovery module. This provides accurate amplitude mea-surements at the input to the clock recovery module....

2-10 Operation Using Probes with an Agilent 83491A Using Probes with an Agilent 83491A You can use external passive and active probes with the Agilent 83491A elec-trical clock recovery module. The procedures in this section generate vertical scale factors. These factors are applied to the calibratio...

2-11 Operation Using Probes with an Agilent 83491A To compensate for a passive probe 1 Connect the probe to the Input connector on the Agilent 83491A clock recovery module. 2 Attach the probe tip to the CAL hook that is located near the floppy disk drive. 3 Press the reference receiver module’s fron...

2-12 Operation Using Probes with an Agilent 83491A To compensate for other devices The information in this section applies to both optical and electrical measure-ments. Since the mainframe’s CAL signal is a voltage source, it cannot be used to calibrate to the probe tip when the units are set to Amp...

3 Agilent 83491A Specifications 3-3 Agilent 83492A Specifications 3-4 Agilent 83493A Specifications 3-6 Agilent 83491/2/3A Operating Specifications 3-7 Declaration of Conformity 3-8 Specifications and Regulatory Information

3-2 Specifications and Regulatory Information Specifications and Regulatory Information Specifications and Regulatory Information This chapter lists specifications and characteristics of the Agilent 83491/2/3A. Specifications apply over the temperature range +15 ° C to +35 ° C (unless oth- erwise no...

4 Front-Panel Optical Adapters 4-2 In Case of Difficulty 4-3 Error Messages 4-5 Electrostatic Discharge Information 4-8 Cleaning Connections for Accurate Measurements 4-10 Returning the Instrument for Service 4-20 Agilent Technologies Service Offices 4-23 Reference

4-2 Reference Front-Panel Optical Adapters Front-Panel Optical Adapters Front PanelFiber-Optic Adapter Description Agilent Part Number Diamond HMS-10 81000AI FC/PC a a. The FC/PC adapter is the standard adapter supplied with the instrument. 81000FI D4 81000GI SC 81000KI DIN 81000SI ST 81000VI Biconi...

4-3 Reference In Case of Difficulty In Case of Difficulty This section provides a list of suggestions for you to follow if the plug-in mod-ule fails to operate. A list of messages that may be displayed is also included in this chapter. Before calling Agilent Technologies or returning the unit for se...

4-5 Reference Error Messages Error Messages The following error messages are for the plug-in module. Typically, the error messages indicate there is a problem with either the plug-in or the mainframe. This section explains what the messages mean and offers a few suggestions that might help resolve t...

4-6 Reference Busy timeout occurred with plug-in_:Try reinstalling plug-in Busy timeout occurred with plug-in_:Try reinstalling plug-in The mainframe is having trouble communicating with the plug-in module. Make sure there is a good connection between the mainframe and the plug-in module. ❒ Remove a...

4-7 Reference Plug-in is not supported:System firmware upgrade is needed der the Agilent 83480K communications firmware kit and install according to the instructions. ❒ The Agilent 83480A, Agilent 54750A mainframes do not accept plug-in mod-ules designed for use with the Agilent 54710A, 54720A. Plug...

4-8 Reference Electrostatic Discharge Information Electrostatic Discharge Information Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. The following figure shows an example of a static-safe...

4-9 Reference Electrostatic Discharge Information Both types, when used together, provide a significant level of ESD protection. Of the two, only the table-mat and wrist-strap combination provides adequate ESD protection when used alone. To ensure user safety, the static-safe accessories must provid...

4-10 Reference Cleaning Connections for Accurate Measurements Cleaning Connections for Accurate Measurements Today, advances in measurement capabilities make connectors and connec-tion techniques more important than ever. Damage to the connectors on cali-bration and verification devices, test ports,...

4-13 Reference Cleaning Connections for Accurate Measurements The soft core, while allowing precise centering, is also the chief liability of the connector. The soft material is easily damaged. Care must be taken to mini-mize excessive scratching and wear. While minor wear is not a problem if the gl...

4-17 Reference Cleaning Connections for Accurate Measurements Visual inspection of fiber ends Visual inspection of fiber ends can be helpful. Contamination or imperfections on the cable end face can be detected as well as cracks or chips in the fiber itself. Use a microscope (100X to 200X magnificat...

4-18 Reference Cleaning Connections for Accurate Measurements To clean a non-lensed connector C A U T I O N Do not use any type of foam swab to clean optical fiber ends. Foam swabs can leave filmy deposits on fiber ends that can degrade performance. 1 Apply pure isopropyl alcohol to a clean lint-fre...

4-19 Reference Cleaning Connections for Accurate Measurements C A U T I O N Do not shake, tip, or invert compressed air canisters, because this releases particles in the can into the air. Refer to instructions provided on the compressed air canister. 7 As soon as the connector is dry, connect or cov...

4-20 Reference Returning the Instrument for Service Returning the Instrument for Service The instructions in this section show you how to properly return the instru-ment for repair or calibration. Always call the Agilent Technologies Instrument Support Center first to initiate service before returni...

4-21 Reference Returning the Instrument for Service information should be returned with the instrument. • Type of service required. • Date instrument was returned for repair. • Description of the problem: • Whether problem is constant or intermittent. • Whether instrument is temperature-sensitive. •...

4-23 Reference Agilent Technologies Service Offices Agilent Technologies Service Offices Before returning an instrument for service, call the Agilent Technologies Instrument Support Center at (800) 403-0801, visit the Test and Measurement Web Sites by Country page at http://www.tm.agilent.com/tmo/co...

Index Index-1 A adapter cable, 1-3 , 1-4 Agilent 54701A active probe, 2-11 Agilent 83492A connections, 1-7 maximum input level, 1-5 Agilent offices, 4-23 B Bellcore GR-253-CORE, 2-5 block diagram, 2-7 bypass mode, 2-4 , 2-5 C cabinet, cleaning, iii calibration cycle, 3-2 care of cabinet, iii care of...