Remote Control Commands
R&S
®
SMB100A
357Operating Manual 1407.0806.32 ─ 21
[: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 com-
mand.
The frequency is increased by a logarithmically calculated fraction of the current fre-
quency according to:
step_log
step+1
= f
step
+ step_log
step
x f
step
f
step+1
= f
step
+ step_log
step+1
with f
STARt
< f
STOP
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 f
STOP
- log f
STARt
) / 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" on page 225
[:SOURce]:LFOutput:SHAPe <Shape>
Selects the shape of the LF signal.
Note: The installed hardware determines the available settings. Use the Hardware
Config dialog to check the hardware the instrument is equipped with.
For information on the required hardware revision, refer to the release notes.
Parameters:
<Shape> SINE | SQUare | TRIangle | SAWTooth | ISAWtooth
*RST: SINE
SOURce Subsystem
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