R&S SMB100A Operating Manual page 73

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R&S SMB100A
The status display in the block shows whether LF generator and/or a sweep are active.
The selected internal LF generator and/or noise source are switched on or off with the
TOGGLE ON/OFF key.
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
amplitude, 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 com-
bined 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 sig-
nal 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.
Operating Manual 1407.0806.32 ─ 21
Description of Individual Diagram Blocks
Getting Started
58