HP 8562E, Service Manual

Page: 247 / 482

360
SPAC CAL
361 SPAC CAL
The start bucket correction is out of range. This error indicates
a possible failure of the sweep generator on the Al4 frequency
control assembly. Refer to “Sweep Generator Circuit” in Chapter
11,
“Synthesizer Section.”
The percent of span correction is out of range. This error indicates
a possible failure of the sweep generator on the Al4 frequency
control assembly. Refer to “Sweep Generator Circuit” in Chapter
11,
“Synthesizer Section.”
These error codes are generated when the automatic IF adjustment
routine detects a fault. This routine first adjusts amplitude
parameters, then resolution bandwidths in this sequence: 300
1 MHz, 100 30 10 3 1 300 Hz, 100 Hz,
30 Hz, 10 Hz, 3 Hz, 1 Hz, and 2 MHz. The routine restarts from
the beginning if a fault is detected. Parameters adjusted after the
routine begins but before the fault is detected are correct; parameters
adjusted later in the sequence are suspect. Refer to “Automatic IF
Adjustment” in Chapter 9, “IF Section.”
400 AMPL
401 AMPL 300
402 AMPL
403 AMPL 3K
The IF Section relies on the ADC and video circuitry to perform its
continuous IF adjustments. IF-related errors occur if the ADC, video
circuitry, or A4 assembly linear path is faulty.
Unable to adjust amplitude of resolution bandwidths less than 300 Hz.
Unable to adjust amplitude of 300 Hz resolution bandwidth.
Unable to adjust amplitude of 1 resolution bandwidth.
Unable to adjust amplitude of 3 resolution bandwidth.
7-26 General Troubleshooting