Anritsu 682XXB - Manual (Page 204)

5-38 682XXB/683XXB MM
G If present, replace the A10 PCB.
G If not present, replace the cable W122.
Error 143 Slope DAC Failed
Description: Error 143 indicates a problem with the level slope DAC
circuitry on the A10 PCB.
NOTE
When troubleshooting this error in a 682XXB model, begin
at step 3 of the procedure.
Step 1. Recalibrate the ALC slope. (Refer to chapter 4 for the cali-
bration procedure.)
Step 2. Run self-test.
G If error 143 is not displayed, the problem is cleared.
G If error 143 is still displayed, go to step 3.
Step 3. Replace the A10 PCB and run self-test again.
G If error 143 is not displayed, the problem is cleared.
G If error 143 is still displayed, go to step 4.
Step 4. Replace the A12 PCB and run self-test again.
G If error 143 is not displayed, the problem is cleared.
G If error 143 is still displayed, contact your local ANRITSU
service center for assistance.
Table 5-17. Error Messages 121, 122, 123, 127, 142, and 143 (2 of 2)
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