Rohde & Schwarz SMBV100A - Source:bb Subsystem General Commands

Remote Control Commands
R&S
®
SMBV100A
504Operating Manual 1407.6062.32 ─ 08
EXTernal<ch>
The numeric suffix to EXTernal distinguishes between the available external trigger
inputs.
● SOURce:BB Subsystem General Commands......................................................504
● SOURce:BB:ARB Subsystem...............................................................................505
● SOURce:BB:DM Subsystem.................................................................................549
● SOURce:BB:GRAPhics Subsystem......................................................................584
● SOURce:BB:IMPairment Subsystem....................................................................586
● SOURce:BB:MCCW Subsystem...........................................................................589
7.14.3.1 SOURce:BB Subsystem General Commands
The following section describes the commands for setting the frequency shift and the
phase offset for the signal at the "Baseband" block output.
[:SOURce<hw>]:BB:FOFFset..........................................................................................504
[:SOURce<hw>]:BB:POFFset..........................................................................................505
[: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 150 or 90 MHz depending on the installed option 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 120 or 60 MHz depend-
ing on the installed option in total.
The following applies:
f
offset
- f
use
/2 => -60MHz and f
offset
+ f
use
/2 =< +60MHz
where:
f
use
= the complex useful bandwidth of the I/Q signal before the offset.
f
offset
= frequency offset.
Parameters:
<FOffset> float
Increment: 0.01 Hz
*RST: 0 Hz
Example:
BB:FOFF 2MHZ
sets a frequency offset of 2 MHz.
SOURce Subsystem