Keysight Technologies N9340B, Руководство пользователя

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Making Measurements
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Improving Frequency Resolution and Accuracy
48
Improving Frequency Resolution and
Accuracy
Using the frequency counter to improve frequency
resolution and accuracy.
1 Press [PRESET] (Factory Preset)
2 Input a signal (1 GHz, –30 dBm) to the analyzer’s RF
IN connector.
3 Set the center frequency to 1 GHz and the span to
5 MHz.
4 Press [MARKER] > {More} > {Mode} > {Freq Count} to
turn the frequency counter on.
5 Move the marker by rotating the knob, to a point
half-way down the skirt of the signal response.
6 Press [MARKER] > {More} > {Mode} > {Normal} to turn
off the marker counter.
Figure 4-11 Using the frequency counter
NOTE
Marker count properly functions only on CW signals or dis-
crete spectral components. The marker must be > 40 dB
above the displayed noise level.