HP 8560E Service Manual page 323

General Troubleshooting
System Analyzer Programming Errors (100 to 150)
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 calibration.
Unable to adjust 100 kHz resolution bandwidth and
581 AMPL
resolution bandwidths less than or equal to 10 kHz.
ADC/CALOSC handshake calibration problem in
crystal sweep. Refer to Error 582.
Unable to adjust 100 kHz resolution bandwidth and
582 AMPL
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 50 Ω.
2. Press
3. Press
the knob clockwise to position the marker until the
delta MKR reads −3 dB ±0.1 dB.
4. Press
other side of the peak until the delta MKR reads 0
dB ±0.1 dB.
5. If the delta MKR frequency is between 90 kHz and
110 kHz, the 100 kHz resolution bandwidth is
working properly. If the frequency is outside these
limits, read the following information on the A4 cal
oscillator sweep generator.
If the 100 kHz resolution bandwidth works properly,
the cal oscillator sweep generator is failing to sweep its
oscillator frequency at the correct rate. The error is
detected in sweeping on the skirts of the 100 kHz
322
and set the controls as follows:
PRESET
CENTER FREQ ........................... 300 MHz
SPAN ..............................................500 kHz
Resolution Bandwidth ...................100 kHz
LOG dB/DIV.........................................1 dB
REF LEVEL.......adjust to place signal peak at
top of the screen
and
PEAK SEARCH
and move the marker to the
MARKER DELTA
and turn
MARKER DELTA
Chapter 6