Rohde & Schwarz SMF-B1, Operating Manual

Page: 584 / 653

Remote Control Commands
R&S
®
SMF100A
569 Operating Manual 1167.2319.02 ─ 12
Parameters:
<Shape> SAWTooth | TRIangle
SAWTooth
One sweep runs from the start level to the stop level. The subse-
quent sweep starts at the start level again, i.e. the shape of
sweep sequence resembles a sawtooth.
TRIangle
One sweep runs from start to stop level and back, i.e. the shape
of the sweep resembles a triangle.Each subsequent sweep
starts at the start level again.
*RST:
SAWTooth
Example: SOUR:SWE:POW:SHAP TRI
selects the sweep cycle with alternating ascending and
descending sweep directions.
Manual operation: See "Shape - RF Level Sweep" on page 188
[:SOURce<hw>]:SWEep:POWer:SPACing:MODE?
Queries the sweep spacing mode. The sweep spacing for level sweeps is always lin-
ear.
Return values:
<Mode> LINear
*RST:
LINear
Example: SWE:POW:SPAC:MODE?
queries the sweep spacing for a level sweep at RF output.
Result: LIN
linear spacing
Usage: Query only
[:SOURce<hw>]:SWEep:POWer:STEP[:LOGarithmic] <Logarithmic>
Sets a logarithmically determined sweep step size for the RF level sweep. It is
expressed in decibels and you must enter the
value and the unit dB with the command.
The level is increased by a logarithmically calculated fraction of the current level
according to:
step_size
n+1
= Level
n
+ step_size
n
x Level
n
Level
n+1
= Level
n
+ step_size
n+1
with Level
STARt
< level
STOP
, step_size =
SWE:POW:STEP[:LOG]
and n = number of
sweep steps
This parameter correlates with the number of steps SWE:POW:POIN within the sweep
range as follows:
level_points = ((Level
STOP
- Level
STARt
) / step_size) + 1)
SOURce Subsystem