HP 8924C - Page 340

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S:\HP8924C\USRGUIDE\BOOK\CHAPTERS\errorms.fb
Chapter , Error Messages
One or more self tests failed. Error code: XXXX
An instrument failure was detected when the Test Set was turned on. (For example, having
a stuck front-panel key during turn on.) The numbered error message corresponds to a
binary-weighted group of errors listed in the *TST Common Command description in HP-
IB Common Commands chapter of the HP 8924C Condensed Programming Reference
Guide.
Option not installed.
You selected a function that requires optional hardware that is not present.
Squelch interrupt overflow. Press MEAS RESET.
The Test Set temporarily interrupts audio measurements when squelch is first broken to
prevent internal switching transients from influencing measurements (except when using
the OSCILLOSCOPE, SPECTRUM ANALYZER, DECODER, or SERVICE screens). If
squelch is repetitively broken in a period of a few seconds, the duration of measurement
interruption becomes too great, and the Test Set stops interrupting the signal. Following
measurements may be influenced by transient signals.
Pressing [MEAS RESET] clears the data buffer used to generate interrupts, resetting the
normal squelch operation to eliminate transients.
This condition may occur when monitoring low-level off-the-air signals.
Turn off either AM or FM settings.
You tried to create simultaneous AM and FM (using any combination of AFGen1,
AFGen2, and the Mod In To field). The Test Set does not provide simultaneous AM
and FM.