Pulse Modulation (Option R&S SML-B3) R&S®SML / R&S®SMV03
1090.3123.12 E-6 4.14
Pulse Modulation (Option R&S SML-B3)
The pulse modulator can be controlled from an external source or by an internal pulse generator. With
external control, the external source feeds the pulse modulator directly. The envelope of the RF is
identical to the control signal. With control by the internal pulse generator, the pulse shape of the pulse
generator determines the envelope of the RF. The pulse delay, pulse width and pulse period can be set.
The polarity of pulse modulation is selectable. With Pulse Polarity = Normal, the RF level is switched on
if HIGH level is present at the PULSE modulation input.
Settings for the pulse modulation and the pulse generator can be made in the Modulation - Pulse menu.
Menu selection: Modulation – Pulse
Fig. 4-12 Modulation - Pulse menu (preset setting), equipped with option R&S SML-B3
Pulse Mod Source
Selection of modulation source. Off, Ext and Pulse Gen are available.
IEC/IEEE-bus commands :SOUR:PULM:SOUR EXT; STAT ON
Pulse Mod Polarity
Selection of polarity of modulation signal.
Normal The RF signal is on with HIGH level present.
Inverse The RF signal is suppressed with HIGH level present.
IEC/IEEE-bus command :SOUR:PULM:POL NORM
Pulse Period
Input value of pulse period.
IEC/IEEE-bus command :SOUR:PULS:PER 10us
Pulse Width
Input value of pulse width.
IEC/IEEE-bus command :SOUR:PULS:WIDT 1us
Pulse Delay
Input value of single pulse delay. This value is indicated only if Double Pulse
State is set to Off.
IEC/IEEE-bus command :SOUR:PULS:DEL 1us
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