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Frequency Span
The SP command changes the total display frequency range symmetrically about the center frequency. The
frequency span readout displays the total display frequency range. Divide the readout by ten to determine the
frequency span per division.
Specifying 111 Hz enables zero span mode, which configures the analyzer as a fix-tuned receiver. Otherwise, the
minimum span width is 100 Hz. Maximum span width is 2.5 GHz in the low band, and 22 GHz (2 to 24 GHz) in
the microwave band.
The functions of the SP command and the front panel I key are identical. Thus, if span width is coupled
to the resolution and video bandwidths, the bandwidths change with the span width to provide a predetermined
level of resolution and noise averaging. Likewise, sweep time changes to maintain a calibrated display, if coupled.
All of these functions are normally coupled, unless RB, VB, or ST have been executed. (See CR, CV or CT)
316 Programming
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