Anritsu 682XXB - Manual (Page 217)

682XXB/683XXB MM 5-51
Error 144 RF was Off when Selftest started. Some tests where
not performed
Description: Indicates that some self-tests where not performed be-
cause the RF Output was selected
OFF on the front panel.
Step 1. Press the OUTPUT key on the front panel to turn the RF
Output ON .
Step 2. Run self-test again.
Table 5-24. Error Message 144
TROUBLESHOOTING
TROUBLESHOOTING TABLES
Error 145 AM Meter or associated circuitry failed
Description: Indicates a failure of the internal amplitude modulation
function. The 682XXB/683XXB may or may not provide amplitude
modulation of the RF output signal using modulating signals from an
external source.
Step 1. Set up the 682XXB/683XXB as follows:
a. Press SYSTEM , then Reset .
b. Press MODULATION , then AM to go to the Internal AM
Status display.
c. Press On/Off to turn internal amplitude modulation on.
Step 2. Using an oscilloscope, verify the presence of a 10 volt peak to
peak sine wave signal with a period of 100
ms at the rear
panel AM OUT connector.
G If present, replace the A10 PCB.
G If not present, replace the A8 PCB.
Table 5-25. Error Message 145