R3131 Spectrum Analyzer Operation Manual
3.3 Menu Function Descriptions
3-28
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
Allows you to set the center frequency, and displays the center
frequency and frequency span in the annotation area below the
bottom scale line.
Start
Allows you to set the start frequency (the frequency furthest to the
left on the frequency axis), and displays the start and stop
frequencies 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
frequencies in the annotation area below the bottom scale line.
CF Step AUTO/MNL
Toggles 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.
Peak
→
CF
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
frequency.
Apr 10/98
