Instrument Function
R&S
®
SMB100A
211
Operating Manual 1407.0806.32 ─ 21
and the corresponding parameters under in
Chapter 5.5.4.1, "Pulse Generator Set-
Option R&S
SMB-K27 enables the generation of pulse trains. For description of the
Chapter 5.5.4.2, "Pulse Train Generation"
State
Activates pulse modulation.
When the internal modulation source (pulse generator) is selected, the pulse generator
is switched on automatically and the video/sync signal is output at the PULSE VIDEO
output at the rear of the instrument. Signal output can be switched off in the "Pulse
Generator" dialog (see
Chapter 5.5.4, "Pulse Generator"
Remote command:
Source
Selects the modulation signal source for pulse modulation.
"Pulse Generator"
Uses the pulse generator as modulation signal source.
Uses the internally generated rectangular signal pulse modulation.
"External"
Uses an externally applied modulation signal.
The external modulation signal is input via the PULSE EXT connec-
tor.
Remote command:
Polarity
(External Source only)
Selects the polarity of the modulation signal.
"Normal"
The RF signal is
On
while the level is high at the modulation input.
"Inverse"
The RF level is
Off
if the level is high at the modulation input.
Remote command:
5.4.6 Stereo Modulation
Options R&S
SMB-B5, Stereo/RDS Coder enables generation of stereo-modulated RF
signals according to standard. Beside the MPX (FM stereo multiplex) signal, also the
radio traffic service ARI (Automotive Radio Information) and Radio Data System (RDS)
are supported by the option.
An internal or external source can be selected for the audio signal of the stereo modu-
lation. In case of external source, the external signal is input via the analog L and R
inputs or via the digital S/P DIF interface at the rear of the instrument. In case of inter-
nal source, the LF generator is used. Measurements can be performed in the operating
modes L and R, and L = R, L = –R and R!=L (ext. signals only).
Modulation
