8 SYSTEM SETTINGS
234
8.9 Stimulus Frequency Adjustment
This function provides fine adjustment of the stimulus frequency by means of an
external frequency meter. By setting the stimulus frequency adjustment coefficient from
-128 to +127, you can perform relative adjustment of the frequency within ±0.001%
(typical value). This setting will be saved in the nonvolatile memory of the Analyzer.
The function adjusts the frequency of the internal reference frequency oscillator, so to
adjust the frequency over all the operating frequency range, it is sufficient to perform
the adjustment in one frequency point.
To adjust the stimulus frequency, proceed as follows:
Switch the Analyzer on and warm it up to the operating temperature for 40 minutes;
Connect the frequency meter to the output connector of the internal reference frequency
(10 MHz) oscillator or to one of the Analyzer test ports;
If you connect the frequency meter to a test port of the Analyzer, set this test port to the
CW-frequency output operation.
To access the stimulus frequency adjustment function,
use the following softkeys:
System > Misc Setup > Frequency Adjustment…
In the pop-up dialog, set the stimulus frequency adjustment coefficient, which ensures
the value measured by the frequency meter being closest to the output frequency of the
Analyzer. Save this coefficient to the nonvolatile memory by clicking Save softkey.
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