Rohde & Schwarz SMU200A - Page 766

Remote Control Commands
R&S
®
SMU200A
746Operating Manual 1007.9845.32 ─ 15
[:SOURce]:LFOutput:SWEep[:FREQuency]:STEP:LOGarithmic <Logarithmic>
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.
Parameters:
float
0.01 to 100
0.01
1
PCT
<Logarithmic>
Range:
Increment:
*RST:
Default unit:
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.
Example:
[:SOURce]:LFOutput:VOLTage <Voltage>
The command sets the output voltage of the LF output.
Parameters:
float
0 to 4
0.001
1
V
<Voltage>
Range:
Increment:
*RST:
Default unit:
LFO:VOLT 3 V
sets the voltage of the LF output to 3 V.
Example:
SOURce Subsystem