Rohde & Schwarz SMBV100A - Page 827

Remote Control Commands
R&S
®
SMBV100A
812Operating Manual 1176.8016.02 ─ 17
This parameter is related to the number of steps ([:SOURce<hw>]:SWEep[:
FREQuency]:POINts) within the sweep range as follows:
f
STARt
< f
STOP
freq_points = (f
SPAN
/ step_lin) + 1
If you change the step size, the number of steps changes accordingly. The sweep
range remains the same.
The keywords [:FREQuency] and [:LINear] can be omitted. The command is then
SCPI-compliant.
Parameters:
<Linear> float
Range: full frequency range
Increment: see the data sheet: RF characteristics > Resolution
of setting
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 281
[: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.
SOURce Subsystem