Agilent Technologies 8590 Series Service Manual page 629

Analyzer Messages
Interpreting Analyzer Messages
Cannot engage phase lock with current
CAL FREQ data (U)
Indicates that the routine needs to be performed before
CAL FREQ
phase locking can be turned on.
Related Assemblies
A9 third converter assembly.
Troubleshooting Hints
, −37,
If this message appears, press , , ,
FREQUENCY Hz CAL More 1 of 4
, , and perform the CAL FREQ routine
More 2 of 4 DEFAULT CAL DATA
again.
Cannot reach N dB points (U)
Indicates that the number of dB specified for the N dB PTS function is
greater than the distance of the signal peak from the analyzer noise
floor or peak threshold.
Related Assemblies
A9 third converter, A16 processor/video assembly.
Troubleshooting Hints
Access the detector by pressing , , .
TRACE More 1 of 3 DETECTOR SMP PK
Toggle between SAMPLE and PEAK detector while looking for a
difference in trace amplitude. If there appears to be a drastic difference
in amplitude, the problem lies in the PEAK detector section of the A16
processor/video assembly.
Check trigger input (U)
Indicates that the analyzer needs an external trigger signal to use the
time-gating functions.
Related Assemblies
A16 processor/video assembly, A105 gated video board assembly.
Troubleshooting Hints
Ensure there is a trigger pulse connected to the GATE TRIGGER
INPUT connector on the rear panel of analyzer and that the GATE
OUTPUT is connected the EXT TRIG INPUT connector.
Chapter 14 629