System Overview
R&S
®
SMB100A
61
Quick Start Guide 1407.0812.62 ─ 20
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 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 sig-
nal. 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.
Description of Individual Diagram Blocks
