Chapter 14 655
Analyzer Messages
Interpreting Analyzer Messages
If one of the 10 dB step gains appears to be faulty, check the step-gain
control lines from the A7 analog interface assembly.
Refer to “Troubleshooting the A15 Motherboard Assembly” in
Chapter 5 for the location of the step gain control lines.
If the control lines function correctly, suspect a A12 amplitude control
assembly failure.
Refer to the IF section gain control information in Chapter 5 for further
information about the operation of the 10 dB step gains.
Refer to the
CONF TEST description in Chapter 13 for more information
about the confidence test routine.
Stop at marker not available with negative
detection (U)
Indicates that the marker counter cannot be used when negative peak
detection is selected. To use the marker counter, turn off negative peak
detection with
DETECTOR PK SP NG.
SYMTAB EMPTY (U)
Indicates that the user-defined items (user-defined functions,
user-defined variables, user-defined traces, user-defined softkeys) and
any personalities (for example, the 85716A CATV System Monitor
Personality) in the analyzer memory have been deleted.
Related Assemblies
A16 processor/video assembly.
Troubleshooting Hints
Use DISPOSE USER MEM to clear analyzer memory. Perform instrument
calibrations. If the message is still displayed, it may indicate a
hardware failure.
TABLE FULL (U)
Indicates the upper or lower table of limit lines contains the maximum
number of entries allowed. Additional entries to the table are ignored.
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