Getting Started
R&S
®
SMB100A
48Operating Manual 1407.0806.32 ─ 13
Modulation block
The internal and external analog modulations are configured and activated in this block.
The MOD ON/OFF key switches the active modulation(s) on/off.
The internal modulation sources are configured in the "Mod Gen" block. External ampli-
tude, frequency or phase modulation signals can be fed in at the input connector MOD
EXT at the front of the instrument. An external pulse signal is fed in via the BNC connector
PULSE EXT at the rear of the instrument. AC or DC coupling for external feed is possible.
Modulation signals of up to two sources (internal and external source) can be combined
for AM/FM and PhiM modulation.
Available internal and external analog modulation modes are:
●
Amplitude modulation (AM)
●
Frequency modulation (FM)
●
Phase modulation (PhiM)
●
Pulse modulation (Pulse)
●
Stereo modulation (Stereo)
Note: For modulation modes that can be simultaneously used, refer to the R&S SMB
data sheet.
The status display in the block shows the active modulation(s). Use the TOGGLE ON/
OFF key to switch the active modulation of the block on or off.
RF block
In this block, the RF parameters and frequency/level sweep settings are set.
The active sweep is displayed in the block. The RF ON/OFF key switches the RF signal
on and off. When the signal is switched off, the switch before the RF output symbol is
open.
RF settings include:
●
Frequency and reference frequency
●
Level settings; if required.
●
NRP-Z Power Viewer using power sensors
●
Frequency and level sweep
●
List Mode settings. In this mode, extremely fast frequency and level settings can be
made.
The RF 50 OHM output connector at the front of the instrument provides the RF signal.
An external trigger/gate signal for sweeps is input via the INST TRIG connector at the
rear of the instrument
Note: Frequency and level are set fast with the aid of the FREQ and LEVEL keys.
Use the TOGGLE ON/OFF key to switch the RF output on or off.
3.4 Example of Setup
This section provides an example on how to configure the instrument for generating of
an amplitude modulated signal.
Example of Setup
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