R&S SMB100A, Operating Manual

Page: 439 / 528

Remote Control Commands
R&S
®
SMB100A
424 Operating Manual 1407.0806.32 ─ 21
Example: FREQ:STAR 1GHz
sets the start frequency to 1 GHz.
FREQ:STOP 5GHz
sets the stop frequency to 5 GHz.
SWE:SPAC LIN
sets linear sweep spacing.
SWE:STEP 2 MHz
sets the step width for linear sweep spacing to 2 MHz (RF
sweep) at the RF output. The number of sweep steps for linear
sweep spacing (
POINts
) is automatically set to 2001.
Manual operation: See "Step Lin/Log - Frequency Sweep" on page 180
[:SOURce<hw>]:SWEep[:FREQuency]:STEP:LOGarithmic <Logarithmic>
Sets a logarithmically determined sweep step size for the RF 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
n+1
= f
n
+ step_log
n
x f
n
f
n+1
= f
n
+ step_log
n+1
with f
STARt
< f
STOP
and n = number of sweep steps
This parameter correlates with the number of steps 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: 1E-3
*RST:
1
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 180
SOURce Subsystem