Agilent Technologies 11974 Series, User Manual

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64 Chapter 3
Operation
Using an 71000 Series Spectrum Analyzer with an 70907B, 70909A, or 70910A
O
p
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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 whenever the 11974 is
connected to a different spectrum analyzer. Periodically check the calibration.
1. Set the 11974 rear-panel switches
70907B
(this switch also applies to the 70909 and
70910A) and
LEDS
to the ON position, and the other two switches to the OFF position,
to properly scale the tune ramp of the spectrum analyzer.
2. When the 71000 is set up with multiple active input ports available, configure the
analyzer for a preselected external mixer by using the following key sequence:
MENU
State
select input
IN “n” EM “Model Number”
1
NOTE If the State key is not available when you press MENU, skip configuration
step 2 .
3. Select the frequency band of operation by using the following key sequence:
State
ext mixer
fulband KAQUVE
Press the softkey for the appropriate frequency band. (
INSTR PRESET
will reset this
to the default active input, see INSTR PRESET on page 68.)
4. Initialize the preselector-peak DAC to the center of its range by pressing
State,
pre-select
,
PRESEL DAC
, and 128, then terminate the entry with the
ENTER
softkey.
5. Set the analyzer to zero span by pressing
Freq
and
SPAN
and entering 0 Hz.
NOTE Due to the repetitive nature of this procedure, it may be helpful to save the
center-frequency settings in unused state registers after performing
step a
and step c .
1. “Model Number” will be either 70907A, 70909A, or 70910A; “n” is a number indicating the order in
which the input devices were found by the input device search.