Pulse Modulation R&S SMB
1407.0806.32 4.72 E-2
Pulse Modulation
External and internal Pulse modulation requires options R&S SMB-K22, Pulse Modulator and
R&S SMB-K23, Pulse Generator.
An internal or external source can be selected for pulse modulation. In case of external source, the
external signal is input via the PULSE EXT connector at the rear of the instrument. In case of internal
source, this connector can be used as external trigger or gate signal input for internal pulse modulation.
The polarity and input impedance of the connector can be selected.
The pulse signal is output at the PULSE VIDEO connector at the rear of the instrument.
NOTE
The level is decreased by 30 dB during Sample&Hold measurement!
When pulse modulation is activated, the ALC state of the R&S SMB is automatically
changed to ALC OFF (Sample & Hold). In this state the ALC loop is opened and the
output level is not regulated but the level modulator is set directly. In order to set the
correct output level, a sample & hold measurement is executed after each frequency
or level setting. The level is decreased by 30 dB during Sample&Hold measurement
Pulse Modulation Menu
The Pulse Modulation menu is opened in the Mod function block or using the MENU key under Mod.
In the upper section of the menu, the modulation source is selected and the modulation switched on.
The configuration of the selected external and/or internal modulation source is performed in the lower
section of the menu.
State - Pulse Modulation
Activates/deactivates 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 menu of the
Mod Gen block.
Remote-control command:
SOUR:PULM:STAT ON
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