Command Description R&S SMC100A
1411.4060.32 6.56 E-1
[SOURce:]LFOutput:SWEep[:FREQuency]:SPACing LINear | LOGarithmic
The command selects linear or logarithmic sweep spacing.
Example:
LFO:SWE:SPAC LIN
'selects linear sweep spacing.
*RST value Resolution Options SCPI
LINear - - Device-specific
[SOURce:]LFOutput:SWEep[:FREQuency]:STEP[:LINear] 0 ... (STOP - STARt)
The command sets the step width for the linear sweep.
This command is linked to the command :LFOutput:SWEep[:FREQuency]:POINts as follows:
The following applies for STARt < STOP: POINts = (((STOP-STARt) / STEP:LIN) + 1
If STEP:LIN changes, the value of POINTs is adjusted. The STARt and STOP value is retained.
Example:
LFO:FREQ:STAR
'sets the start frequency to 2 kHz.
LFO:FREQ:STOP
'sets the stop frequency to 20 kHz.
LFO:SWE:SPAC LIN
'sets linear sweep spacing.
LFO:SWE:STEP 2 kHz
'sets the sweep step width to 2 kHz. The number of sweep steps for linear
sweep spacing (POINts) is automatically set to 11.
*RST value Resolution Options Correlation SCPI
1kHz 0.1 Hz -
The value of :LFO:SWE:POIN is
adjusted automatically.
Device-specific
[SOURce:]LFOutput:SWEep[:FREQuency]:STEP:LOGarithmic 0.01 ... 100 PCT
The command specifies the step width factor for logarithmic sweeps. The next frequency value of a
sweep is calculated (for STARt < STOP) using the following formula:
New frequency = Old frequency + STEP:LOG x Old frequency
STEP:LOG therefore gives the fraction of the old frequency. The frequency is increased by this
fraction for the next sweep step. Usually STEP:LOG is given in percent, whereby the suffix PCT must
always be used.
The command is linked to the command :LFOutput:SWEep[:FREQuency]:POINts as follows:
The following applies for logarithmic sweeps and STARt < STOP:
POINts = ((log STOP - log STARt) / log STEP:LOG) + 1
If STEP:LOG changes, the value of POINTs is adjusted. The STARt and STOP value is retained.
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