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R3131 Spectrum Analyzer Operation Manual

2.2.4 Measuring Frequency Using Counter

The counter function measures the signal frequency at the marker with high accuracy.

You do not have to precisely position the marker on the peak you wish to measure however you should

note that the displayed amplitude value corresponds to the marker position.

The maximum resolution possible for the counter function display is 1 Hz. As you increase the resolution,

you will have to increase the sweep time to compensate.

NOTE:

I. The counter function may not work normally if the span is greater than 200 MHz or the difference between the

marker and the noise level is 25 dB or less.

2. The signal track mode cannot be used with this function.

The following example shows how to measure the frequency.

Power on

1. Turn the spectrum analyzer power on.

Initialization

This resets the current settings to the factory defaults.

2. Press SHIFT and CONFIG (PRESET).

The default settings have now been reset.

REF 0.0 dBm

10dBI

Wed 10 Dec 1997

ATT 10dB A_wrt B_blnk

Norm Norm

CENTER 1.5000 GHz SPAN 3000 MHz

RBW 1 MHz VBW 1 MHz SWP SO ms

Figure 2-19 Factory Defaults Screen

Calibration signal output

This activates the calibration signal used for the measurement.

3. Press SHIFT, 7 (CAL) and Cal Sig Level ON/OFF.

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ADVANTEST R3131 Series User Manual

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