R&S SMB100A User Manual

Instrument Function
R&S
®
SMB100A
211Operating Manual 1407.0806.32 ─ 21
and the corresponding parameters under in Chapter 5.5.4.1, "Pulse Generator Set-
tings", on page 226.
Option R&S SMB-K27 enables the generation of pulse trains. For description of the
pulse train dialog, see Chapter 5.5.4.2, "Pulse Train Generation", on page 230.
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", on page 226).
Remote command:
[:SOURce<hw>]:PULM:STATe on page 394
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:
[:SOURce<hw>]:PULM:SOURce on page 393
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:
[:SOURce<hw>]:PULM:POLarity on page 393
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

R&S SMB100A Specifications

General

Brand	R&S
Model	SMB100A
Category	Inverter
Language	English