Dac Control - Agilent Technologies 8564EC Service Manual

To Use the Diagnostics
When performing DAC/LATCH Control or Cal Osc Control, freeze the
NOTE
spectrum analyzer by pressing
IF ADJ OFF. (Do not provide a trigger.) When it is necessary to observe
the effects of changes on the display, set the spectrum analyzer for a
long sweep time (> 10 seconds) and make changes during a sweep.
The program calls out an 8566, but an 8562A, 8563A, or 8563E can be
used to make measurements that require using another spectrum
analyzer. The 8566B or an 8560 E-Series spectrum analyzer is
recommended for speed of measurement.
Cycle the DUT spectrum analyzer power when you are done doing
diagnostics.

DAC Control

The DAC control program supplies the current DAC value and allows
you to set some of the DACs in the spectrum analyzer. The
recommended instrument state for the spectrum analyzer under test
may differ, depending on which DAC is selected. See
page 80
1. To preset state 1, set the spectrum analyzer as follows:
2. Press
3. To preset state 2, set the spectrum analyzer as follows:
4. Press
5. See
Chapter 2
for the recommended instrument state.
Center frequency ............................................................. any
Span ............................................................................... any
Trigger ......................... External (with no trigger applied)
IF ADJ ........................................................................... OFF
Sweep ......................................................................... Single
, SAVE STATE, STATE 1.
SAVE
Center frequency ........................................................... any
Span ............................................................................... any
Reference level ............................................................... any
Resolution bandwidth ................................................... any
Sweep time ....................................................... >10 seconds
Sweep ................................................................. CONTinue
Trigger .............................................................. FREE RUN
, SAVE STATE, STATE 2.
SAVE
Table 2-3 on page 80
( , RECALL STATE, STATE 1 or STATE 2) for each DAC
RECALL
selection.
Adjustment/Diagnostic Software
, EXTERNAL,
TRIG
to set the recommended instrument state
To Use the Diagnostics
, , then
SGL SWP CAL
Table 2-3 on
79