Rohde & Schwarz SMB100A - [: S Ource<Hw>]: S Weep: P Ower: D Well; [: S Ource<Hw>]: S Weep[: F Requency]: S TEP: L Ogarithmic

Remote Control Commands
R&S
®
SMB100A
384Operating Manual 1407.0806.32 ─ 13
Manual operation: See "Step Lin/Log - Frequency Sweep" on page 153
[:SOURce<hw>]:SWEep[:FREQuency]:STEP:LOGarithmic <Logarithmic>
The comman 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 :SWEep[:FREQuency]:POINts for STARt <
STOP as follows:
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:
<Logarithmic> float
Range: 0.01 to 9999
Increment: 0.01 PCT
*RST: 1 PCT
Example:
FREQ:STAR 1GHz
sets the start frequency to 1 GHz.
FREQ:STOP 5GHz
sets the stop frequency to 5 GHz.
SWE:SPAC LOG
sets logarithmic sweep spacing.
SWE:STEP:LOG 10PCT
sets the step width for logarithmic sweep spacing to 10% of the
previous frequency in each instance (for a frequency sweep).
Manual operation: See "Step Lin/Log - Frequency Sweep" on page 153
[:SOURce<hw>]:SWEep:POWer:DWELl <Dwell>
The command sets the time taken for each level step of the sweep.
Tip: It is recommended to switch off the "GUI Update" for optimum sweep performance
especially with short dwell times (SYSTem:DISPlay:UPDate OFF).
Parameters:
<Dwell> float
Range: 1E-3 to 100
Increment: 100E-6
*RST: 15E-3
Default unit: s
SOURce Subsystem