Agilent Technologies 5071A manual Assembly/Module Diagnostic Trees Diagnostic Section

Assembly-Level Service

Service

Assembly/Module Diagnostic Trees

(Diagnostic Section 3)

A8 Diagnostic Tree (A/M Subsection 3)

3.3.31 PPS Outputs Test

Any TCO Option: Step 2 text is changed to:

Use the oscilloscope with 50 Ω input termination to check for 20 microsecond pulses at a rate of one pulse per second at the external front-panel 1 PPS output connector.

Step 3 text first sentence is changed to:

Verify that the 1 PPS output level is: pulse low level less than 0.5 volts, and pulse high level more than 3.0 volts.

The QUESTION: is changed to:

Is the 1 PPS output as specified in step 2?

3.3.4A8 Front/Rear-Panel Sync Input Test

Any TCO Option: The procedure title is changed to:

3.3.4 A8 Front-Panel Sync Input Test

Step 5 is deleted.

3.3.5A8-to-Chassis Interconnect Test

Any TCO Option: Step 3 text is changed to:

Carefully remove the two SMB cable connectors (Note their locations first.) from J17 and J18 on A1.

Step 4 text is changed to.

Verify continuity and rule out short-to-ground for both cables an their corresponding front-panel 1 pps output and Sync input connectors. Record results.

The QUESTION, text is changed to:

Are any of the two SMB-to-BNC cable assemblies open or shorted?

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