Remote Control Commands > SOURce Subsystem > SOURce:LFOutput Subsystem > [:SOURce<hw>]:LFOutput:SWEep[:FREQuency]:STEP:LOGarithmic
[:SOURce<hw>]:LFOutput:SWEep[:FREQuency]:STEP:LOGarithmic <Logarithmic>

Sets the logarithmically determined sweep step size for the LF frequency sweep. It is expressed in percent and you must enter the value and the unit PCT with the command.

The frequency is increased by a logarithmically calculated fraction of the current frequency according to:

step_logstep+1 = fstep + step_logstep x fstep

fstep+1 = fstep + step_logstep+1

with fSTARt < fSTOP and step = the current number of the sweep steps

This parameter correlates with the number of steps LFO:SWE[:FREQ]:POIN within the sweep range as follows:

freq_points = ((log fSTOP - log fSTARt) / log step_log) + 1

If you change the step size, the number of steps changes accordingly. The sweep range remains the same.

Parameters:
<Logarithmic>
float
Range: 0.01  to  100
Increment: 0.01
*RST:1
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.

Manual operation: See "Step Lin/Log - LF Sweep"

 


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