Rohde & Schwarz SMU200A - Page 803

Remote Control Commands
R&S
®
SMU200A
783Operating Manual 1007.9845.32 ─ 15
Parameters:
SAWTooth|TRIangle
SAWTooth
One sweep runs from the start level to the stop level. The
subsequent 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.
SAWTooth
<Shape>
*RST:
SOUR:SWE:POW:SHAP TRI
selects the sweep cycle with alternating ascending and descend-
ing sweep directions.
Example:
[:SOURce<hw>]:SWEep:POWer:SPACing:MODE?
The command queries the sweep spacing. The sweep spacing for level sweeps is always
linear.
SWE:POW:SPAC:MODE
queries the sweep spacing for a level sweep at RF output.
Result: LIN
linear spacing
Example:
Query onlyUsage:
[:SOURce<hw>]:SWEep:POWer:STEP[:LOGarithmic] <Logarithmic>
The command sets the step width factor for logarithmic sweeps. The next level value of
a sweep is calculated (for STARt < STOP) using the following formula:
New level = Old level + STEP:LOG x Old level
STEP:LOG therefore gives the fraction of the old level. The level is increased by this
fraction for the next sweep step. Usually STEP:LOG is given in decibels, whereby the
suffix dB must always be used.
The command is linked to the command :SWEep:POWer:POINts for STARt < STOP as
follows:
POINts = ((STOP - STARt) / STEP:LOG) + 1
If STEP:LOG changes, the value of POINTs is adjusted. The STARt and STOP value is
retained.
SOURce Subsystem