Specifications

13-10
Troubleshooting
Sync Loss and Errors Troubleshooting
Sync Loss and Errors Troubleshooting
If either of these indicators is lit, check that the Error Performance Analyzer verification
procedure has been performed correctly. If good, suspect clock or data cabling between
elements or a fault in the Pattern Generator or Error Detector.
Communication Troubleshooting
If you are unable to access elements in your system through the Display - no
communication between the Display and the elements - and there are no error indicators
lit, use the following procedure to isolate the fault:
1. Check all elements have been set to valid HP-MSIB addresses.
2. Isolate all elements in your system as follows:
i. Power down your system.
ii. Disconnect all HP-MSIB cables.
iii.Remove the Clock Source from the Display.
3. Check that the Display can access all 31 addresses on row 0 as follows:
i. Power on the Display.
ii. Press and .
iii.Use the front panel control knob to scroll the green rectangle (on the display) along
the 31 addresses on row 0.
If a red rectangle appears, the Display is faulty.
If you can access the addresses, the Display is good. Power down the Display then
go to step 4.
4. Check the Clock Source as follows:
i. Plug a Clock Source into the Display.
ii. Power on the Display.
iii.Check that the Display can access all 31 addresses on row 0,usetheprocedurein
step 2.
If a red rectangle appears, the Clock Source is faulty.
If you can access the addresses, the product number will be visible.
5. Check the Agilent 70843 as follows:
i. Connect known good HP-MSIB cables between the HP-MSIB IN and OUT ports on
the rear panel of the Display and Agilent 70843.
ii. Power on the Display and Agilent 70843.
iii.Check the Display can access all 31 addresses on row 0, use the procedure in step 2.
If a red rectangle appears, the Agilent 70843 is faulty.
If you can access the addresses, the Agilent 70843 is good.
DISPLAY
Address Map