Rohde & Schwarz SMU200A - Page 599

Remote Control Commands
R&S
®
SMU200A
579Operating Manual 1007.9845.32 ─ 15
[:SOURce<hw>]:BB:POFFset..........................................................................................580
[:SOURce<hw>]:BB:ROUTe............................................................................................580
[:SOURce]:BB:PATH:COUNt?
The command queries the number of installed baseband paths.
Return values:
integer<Count>
PATH:COUN?
queries the number of baseband paths.
Response:1
The instrument is equipped with one baseband path.
Example:
Query onlyUsage:
[:SOURce<hw>]:BB:FOFFset <Foffset>
The command sets the frequency offset for the baseband signal. The offset affects the
signal on the baseband block output. It shifts the useful baseband signal in the center
frequency.
Note: It is not possible to enter a frequency offset if a waveform with a sample rate of
exactly 100 MHz is introduced. A signal of this nature is not routed via the resampler in
which the frequency shift takes place. This type of entry is also prohibited if the noise
generator ("AWGN" block) is on.
The complex I/Q bandwidth of the useful signal must not exceed 80 MHz in total.
The following applies:
f
offset
- f
use
/2 => -40MHz and f
offset
+ f
use
/2 =< +40MHz
where:
f
use
= the complex useful bandwidth of the I/Q signal before the offset.
f
offset
= frequency offset.
Parameters:
float
0.01 Hz
0 Hz
<Foffset>
Increment:
*RST:
BB:FOFF 2MHZ
sets a frequency offset of 2 MHz.
Example:
[:SOURce<hw>]:BB:PGAin <Pgain>
The command sets the relative path gain for the selected baseband signal compared to
the baseband signals of the other baseband sources (second path or external baseband).
The gain affects the signal on the "baseband block" output.
SOURce Subsystem