EasyManuals Logo

Symmetricom 5071A Assembly And Service Manual

Symmetricom 5071A
202 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #114 background imageLoading...
Page #114 background image
2. Service
Assembly/Module Diagnostic Trees (Diagnostic Section 3)
98
3.3.4. A8 Front/Rear-Panel Sync Input Test
1 Connect the pulse generator output to the front panel Sync input.
2 Set the pulse generator to apply 0 to 3.0 volt pulses of 1 microsecond length
at a rate of 10 pps.
3 Use the CLOCK/Sync menu to arm the front input.
4 Observe the LCD display and record the displayed message.
5 Repeat steps 1 through 4 using the rear-panel Sync input.
QUESTION: What message was displayed on the LCD?
If the LCD display shows: Caught
a sync pulse for both
Sync inputs, A8 is operational,
continue testing
If the LCD display shows: Sync
timed out for one or both Sync
inputs, Go to, 3.3.4.1.
3.3.4.1 A8 Sync Fault
1 Remove instrument power and replace A8.
2 Repeat procedure 3.3.4.
QUESTION: Does the LCD display Caught a sync pulse
for both inputs?
If Yes: Retain new A8 and retest.
If No: Go to, 3.3.5.
3.3.5. A8-to-Chassis Interconnect Test
1 Remove instrument power.
2 Remove A8 from slot XA8.
3 Carefully remove the five SMB cable connectors (Note their locations first.)
from J14, J15, J16, J17, and J18 on A1.
4 Verify continuity and rule-out short-to-ground for all five cables and their
corresponding front- and rear-panel 1 pps output and Sync input connectors.
Record results.
5 Reconnect the verified cables and BNC connectors.
QUESTION: Are any of the five SMB-to-BNC cable assemblies
open or shorted?
If Yes: Replace the cable assembly as required, reinstall A8 and retest.
If No: A1 may be defective, contact Symmetricom for further assistance.

Table of Contents

Other manuals for Symmetricom 5071A

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Symmetricom 5071A and is the answer not in the manual?

Symmetricom 5071A Specifications

General IconGeneral
BrandSymmetricom
Model5071A
CategoryMeasuring Instruments
LanguageEnglish

Related product manuals