Table of Contents
Advertisement
Frequency Tracking Calibration This procedure is used to align the frequency of the
preselector filter of the Agilent 11974 to the tuned frequency of the analyzer. This
procedure should be followed any time that the Agilent 11974 is connected to a different
analyzer. The calibration should be periodically checked.
1. Set the Agilent 11974 rear-panel switches "ESA/PSA/70907B" and "LEDS" to the ON
position, and the other two switches to the OFF position, in order for the Agilent 11974
to properly scale to the tune signal of the analyzer.
2. Configure the analyzer for a preselected external mixer by pressing the following keys:
,
Preset
Factory Preset
(Presel)
3. Set the desired band of operation. Press
only A,Q,U, and V bands are available.)
4. Set the Presel Adjust to 0 MHz by pressing
5. Set the analyzer to zero span by pressing
6. Set the analyzer center frequency by pressing
corresponding value for the appropriate mixer. (Refer to
the Agilent 11974, adjust the corresponding potentiometer until one or both of the green
LEDs are lit.
Table 3-4.
Mixer
Agilent P/N
11974A
11974Q
11974U
11974V
7. Change the analyzer center frequency to the value indicated in
adjust the corresponding potentiometer on the rear panel of the 11974 until one or both
of the green LEDs are lit.
Table 3-5.
Mixer
Agilent P/N
11974A
11974Q
11974U
11974V
8. Repeat steps 6 and 7 until the green LEDs are lit at both frequencies without additional
adjustments.
Chapter 3
Using an E4407B Spectrum Analyzer or 7405A EMC Analyzer
(if present),
Input/Output
Return
SPAN
Analyzer Center
Frequency
26.5 GHz
33.0 GHz
40.0 GHz
50.0 GHz
Analyzer Center
Frequency
40.0 GHz
50.0 GHz
60.0 GHz
75.0 GHz
,
(Ext),
Input Mixer
Mixer Config
,
,
,
Ext Mix Band
A
Q
,
AMPLITUDE
Presel Adjust
,
.
Zero Span
,
FREQUENCY
Center Freq
Table
3-4.) On the rear panel of
Potentiometer
"26.5 GHz Adjust"
"33.0 GHz Adjust"
"40.0 GHz Adjust"
"50.0 GHz Adjust"
Table 3-5.
Potentiometer
"40.0 GHz Adjust"
"50.0 GHz Adjust"
"60.0 GHz Adjust"
"75.0 GHz Adjust"
Operation
,
Mixer Type
,
, or
. (Note that
U
V
, 0,
.
MHz
, and enter the
and again
81
Advertisement
Table of Contents
