Agilent Technologies 35670A Manual page 479

Dynamic signal analyzer gpib programming

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FREQ:SPAN UP increases the frequency span to the next largest allowable value. FREQ:SPAN

DOWN decreases the frequency span to the next smallest allowable value.

The frequency resolution is determined by the [SENSe:]FREQuency:RESolution command. The

frequency span is proportional to the sampling rate. To increase the sampling rate, you must

increase the frequency span.

In octave analysis instrument mode (INST:SEL OCT; Option 1D1):

This command is not valid. The frequency resolution is determined by the

[SENSe:]FREQuency:RESolution:OCTave command.

In order analysis instrument mode (INST:SEL ORD;Option 1D0):

This command is not valid. The frequency resolution is determined by the frequency span.

In swept sine instrument mode (INST:SEL SINE; Option 1D2):

The value specified by this command is rounded to the next higher 15.625 mHz step. The

frequency span limits the range of the start frequency (FREQ:STAR) values according to the

following formulas:

for two channel measurements:

(FREQ:STAR)  51.2 kHz - (FREQ:SPAN)

for four channel measurements:

(FREQ:STAR)  25.6 kHz - (FREQ:SPAN)

If logarithmic spacing is used (SWE:SPAC LOG), the value may be expressed in terms of hertz,

decades or octaves.

In correlation analysis instrument mode (INST:SEL CORR):

This command is not valid.