HP 83522A Service Notes page 232

Service Model 83522A
Maximum Unleveled RF Output Power.
Check leveling in External and
Meter leveling modes. If power is leveled for these modes, the problem is with
the internal detector. Otherwise, refer to the troubleshooting information for the
A4 ALC assembly.
Excessive Power Variations. Refer to the troubleshooting information for
the A4 ALC assembly.
Marker Generation
Marker generation problems are generally associated with the A7 Marker or A8
Sampler assemblies. Performance of the Marker and Sampler adjustments is a
good troubleshooting aid for unstable or no marker operation. If the marker
problem is related to external markers only, perform the External Marker
adjustment. If the marker problem is dependent on whether amplitude or
intensity markers are selected, the problem is most likely with the A4 ALC for
amplitude, and the 8350A or interface, for intensity markers.
If external markers are operational and internal markers are not available,
check the Sampled RF output from DCl and the 50 MHz oscillator operation
on the A8 Sampler.
RF Section
RF Section problems are usually indicated by no R F Power, full unleveled RF
power, excessive harmonics, or spurious responses. For an RF power problem
refer to the Power Control section of this troubleshooting inform'ation. For
excessive harmonics or spurious responses, refer to the R F Section service sheet
for further troubleshooting.
Table 8-5. 83522A Error Codes
Error
Code
EOOl
E050
E05 1
E052
E053
Operator
Initiated Test
SHIFT 04
SHIFT 55
SHIFT 55
Function
Tested
8350Al83522A
Plug-in keyboard
Invalid key code
Interval Timer
PIA
Troubleshooting Hints
Check the RF plug-in connections and cable
connections to A3. Do Hex Data Write to
front panel and Hex Data Read of A3S1
Configuration switch. See EOOl Trouble-
shooting in this procedure for specifics.
Check PIFLG
See A1/A2 service sheets for further trouble-
shooting.
See A3 service sheet for further trouble-
shooting.
See A3 service sheet for further trouble-
shooting.
I