344 Chapter7
General Troubleshooting
Error Messages
573 LOG AMPL Unable to adjust amplitude of log scale. Check video
offset circuitry.
574 LOG AMPL Unable to adjust amplitude of log scale. Check video
offset circuitry.
575 LOG AMPL Unable to adjust amplitude of log scale. Check video
offset circuitry.
576 LOG AMPL Unable to adjust amplitude of log scale. Check video
offset circuitry.
577 LOG AMPL Unable to adjust amplitude of log scale. Check video
offset circuitry.
578 LOG AMPL Limiter calibration error from DC logger calibration.
579 LOG AMPL Attenuator CAL level error from DC logger calibration.
580 LOG AMPL Calibration level error from DC logger fidelity
calibration.
581 AMPL Unable to adjust 100 kHz resolution bandwidth and
resolution bandwidths less than or equal to 10 kHz.
ADC/CALOSC handshake calibration problem in
crystal sweep. Refer to Error 582.
582 AMPL Unable to adjust 100 kHz resolution bandwidth and
resolution bandwidths less than or equal to 10 kHz.
Bad CALOSC calibration in sweep rate. Test the
100 kHz resolution bandwidth filter 3 dB bandwidth as
follows:
1. Connect the CAL OUTPUT signal (A4J8) to the
INPUT 50Ω.
2. Press
PRESET and set the controls as follows:
Center frequency ........................ 300 MHz
Span .............................................. 500 kHz
Resolution bandwidth .................. 100 kHz
Log dB/div .......................................... 1 dB
Reference level ......... adjust to place signal peak
at top of the screen
3. Press
PEAK SEARCH and MARKER DELTA and turn
the knob clockwise to position the marker until the
delta MKR reads −3 dB ±0.1 dB.
4. Press
MARKER DELTA and move the marker to the
other side of the peak until the delta MKR reads
0dB±0.1 dB.
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