Command Description R&S SMB
1407.0806.32 6.48 E-2
[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.
Example:
LFO:FREQ:STAR
'sets the start frequency to 1 kHz.
LFO:FREQ:STOP
'sets the stop frequency to 100 kHz.
LFO:SWE:SPAC LOG
'sets logarithmic sweep spacing.
LFO:SWE:STEP:LOG 10PCT
'sets the step width for logarithmic sweep spacing to 10% of the previous
frequency in each instance.
*RST value Resolution Options Correlation SCPI
1 PCT 0.01 PCT -
The value of :LFO:SWE:POIN is adjusted
automatically.
Device-specific
[SOURce:]LFOutput:VOLTage 0 V...4 V
The command sets the output voltage of the LF output.
Example:
LFO:VOLT 3 V
'sets the voltage of the LF output to 3 V.
*RST value Resolution Options SCPI
1 V 0.001 V - Device-specific
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