User`s guide

72 Chapter 3
Operation
Using 8563A, 8561B, 8560A, or 8560 E/EC-Series Spectrum Analyzers
Operation
Frequency Tracking Calibration
Use this procedure to align the frequency of the 11974 tracking filter to the tuned
frequency of the spectrum analyzer Follow this procedure anytime the 11974 is connected
to a different spectrum analyzer. Periodically check the calibration.
1. Set the 11974 rear-panel switches “8563/61/60” and “LEDS” to the ON position, and the
other two switches to the OFF position, in order for the 11974 to properly scale the tune
ramp of the spectrum analyzer.
2. Configure the analyzer for a preselected external mixer by pressing
CONFIG and setting
EXT MXR PRE UNPR to PRE.
3. Set the LO tuning sensitivity as follows:
For the 8564E or 8565E, press
AUX CTRL, REAR PANEL, and setting V/GHz .25 .50
to
.50
For all other analyzers, press AUX CTRL, REAR PANEL, and .5 V/GHz (FAV)
4. Enter the full-band selection mode by using the following key sequence:
AUX CTRL
EXTERNAL MIXER
FULL BAND
Use the ⇑ or ⇓ key until the desired band is reached.
5. Set the spectrum analyzer to zero span by pressing
SPAN, ZERO SPAN.
6. Set the spectrum analyzer center frequency by pressing
FREQUENCY, CENTER FREQ and
entering the corresponding value for the mixer listed below:
for an 11974A: 26.5 GHz
for an 11974Q: 33.0 GHz
for an 11974U: 40.0 GHz
for an 11974V: 50.0 GHz
7. Initialize the preselector-peak DAC at the start of the band by using the following key
sequence:
AUX CTRL
EXTERNAL MIXER
PRESEL PEAK
PRESEL MAN ADJ
128 Hz