Instrument Function
R&S
®
SMBV100A
261Operating Manual 1176.8016.02 ─ 17
The output of the video/sync signal at the PULSE VIDEO output is automatically
switched on when activating pulse modulation. It can be switched off in the "Pulse
Generator" dialog.
State
Activates pulse modulation.
Activation of pulse modulation deactivates ALC and power ramping.
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 5.5.13.4, "Pulse Generator", on page 269).
Remote command:
[:SOURce<hw>]:PULM:STATe on page 801
Source
Selects the modulation signal source for pulse modulation.
"Pulse Generator"
Uses the pulse generator as modulation signal source.
The settings for the pulse characteristics and the trigger are offered in
the "Pulse Generator" section of the "Pulse Modulation" menu.
"External"
Uses an externally applied modulation signal.
The external modulation signal is input via the EXT MOD connector.
Remote command:
[:SOURce<hw>]:PULM:SOURce on page 801
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.
"Inverted"
The RF level is ON while the level is LOW at the modulation input.
Remote command:
[:SOURce<hw>]:PULM:POLarity on page 800
5.5.13 Modulation Generator and LF Output
5.5.13.1 Overview of LF Generator
The internal modulation generator of the instrument provides a sinusodial or rectangu-
lar LF modulation signal without additional equipment options. The corresponding key
data, as for example the frequency range, is specified under "Modulation sources" in
the data sheet.
You can use the internal LF signal as modulation signal source for the analog modula-
tions, as for example the amplitude modulation. The signal applies to all modulations
RF Block
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