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Calibration
Calibration Adjustments
5
5-55
17.
Set the spectrum analyzer reference level, span, resolution and/or video bandwidth as
necessary to make a high-quality level measurement at each applied frequency and
level.
Note
Depending on the actual configuration of the spectrum analyzer/measuring
receiver used, the settings required to make the highest accuracy level
measurements may vary. Consult the spectrum analyzer manufacturer’s
manual for further information.
Note
For each frequency it is important to maintain consistent analyzer/receiver
settings as the target amplitude changes. For any given frequency the
analyzer setting can be to suit, but that setting must be maintained for all
amplitudes at that frequency after the transfer point. In particular, analyzer
attenuator, reference level and resolution bandwidth settings must not
change. Typically there are 3 or 4 amplitudes per frequency point during
which the analyzer settings must be static.
18.
Using the blue arrow keys and rotary knob, edit the UUT
Actual
output until the
spectrum analyzer indicates the
Target
value stated. Press
Accept Target
.
19.
Press
Next Target
.
20.
Repeat steps 17 through 19 for all necessary points requiring the use of the spectrum
analyzer to make level adjustments. When complete the UUT adjustment point title
will indicate
AM Depth
.
21.
Disconnect the spectrum analyzer/measuring receiver from the UUT Base Unit SMA
connector and fit the UUT 50
Ω
Leveling Head. Connect the Leveling Head output to
the spectrum analyzer/measuring receiver RF input.
22.
Reconfigure the spectrum analyzer/measuring receiver to make AM depth
measurements.
23.
Using the blue arrow keys and rotary knob, edit the UUT
Actual
output until the
spectrum analyzer indicates the
Target
value stated. Press
Accept Target
.
24.
Press
Next Target
.
25.
Repeat steps 23 through 24 until all Base adjustments are completed.
26.
Press
Previous Menu
. If it is desired to proceed with head adjustment, press
Adjust
Head
. If not, press
Exit
.
27.
Remove all connections to the base unit.
Summary of Contents for 9640A Series
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