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R3131 Spectrum Analyzer Operation Manual

3.3.9 FREQ Key (Frequency)

This key displays the FREQ menu and allows you to set a center frequency. In addition, it displays the

current center frequency and frequency span in the area below the bottom scale line.

Center

Start

Allows you to set the center frequency, and displays the center

frequency and frequency span in the annotation area below the

bottom scale line.

Allows you to set the start frequency (the frequency furthest to the

left on the frequency axis), and displays the start and stop frequen-

cies in the annotation area below the bottom scale line.

Stop Allows you to set the stop frequency (the frequency furthest to the

right on the frequency axis), and displays the start and stop fre-

quencies in the annotation area below the bottom scale line.

CF Step AUTO/MNL

Peak ---> CF

3-24

Togg les the step size function between AUTO and MNL. This

function is used to change a center frequency using the step keys.

AUTO: Automatically sets the step size to 1/10 of the frequency

span.

MNL: Allows you to set the step size manually.

Sets the marker at the peak point within the search range, and the

marker frequency (at the peak point) is then set to the center fre-

quency.

ADVANTEST R3131 Series User Manual

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