HP 8924E, Assembly

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Chapter 14, Diagnostics Descriptions
Description of RF Diagnostics (RFDIAGS3)
N:\mkt\MANUALS\HP8924C\ALR\diagnos.fb
Signal Generator Synthesizer A24
Table 123 A24 Signal Generator Synthesizer Tests
Measurement Explanation and Suggestions Measurement Point
Reference
Detector
(Ref present) The reference present detector is read with the 200
kHz reference signal enabled. If this measurement
fails, trace the 200 kHz signal from P3-1 of the A27
Reference to P3-3 of the A24 Signal Generator Syn-
thesizer. Latch:gsyn_ref_not_present_sense
Out-of-Lock
Detector
(Locked) The Out-of-Lock Detector is read with the loop set
to be locked. Latch:gsyn_out_of_lock_int_sense
Reference
Detector
(Reference
NOT present) The reference-present detector is read with the 200
kHz the Reference signal disabled at the Reference
assembly. Latch:gsyn_ref_not_present_sense
Out-of-Lock
Detector
(NOT locked) The out-of-lock detector at the Reference assembly.
This should cause the loop to be out of lock. Latch:gsyn_out_of_lock_int_sense
Frequency
Range The 200 kHz Reference is enabled at the Reference
assembly. Then the frequency of this loop is incrim-
inated from 500 to 1000 MHz in 50 MHz steps. The
out-of-lock detector is read at each step. Latch:gsyn_out_of_lock_int_sense