R&S SMB100A Operating Manual page 372

®
R&S SMB100A
[:SOURce<hw>]:LFOutput:SWEep[:FREQuency]:STEP: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
f
step+1
with f
This parameter correlates with the number of steps
sweep range as follows:
freq_points = ((log f
If you change the step size, the number of steps changes accordingly. The sweep
range remains the same.
Parameters:
<Logarithmic>
Example:
Manual operation:
[:SOURce]:LFOutput:SHAPe <Shape>
Selects the shape of the LF signal.
Note: The installed hardware determines the available settings. Use the
Config
For information on the required hardware revision, refer to the release notes.
Parameters:
<Shape>
Operating Manual 1407.0806.32 ─ 21
<Logarithmic>
= f + step_log
step+1 step
= f + step_log
step step+1
< f and step = the current number of the sweep steps
STARt STOP
- log f
STOP
float
Range:
Increment: 0.01
*RST:
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.
See "Step Lin/Log - LF Sweep"
dialog to check the hardware the instrument is equipped with.
SINE | SQUare | TRIangle | SAWTooth | ISAWtooth
*RST:
x f
step step
LFO:SWE[:FREQ]:POIN
) / log step_log) + 1
STARt
0.01 to 100
1
SINE
Remote Control Commands
SOURce Subsystem
on page 225
Hardware
within the
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