Description of Individual Diagram Blocks R&S SMB
1407.0812.62 2.2 E-2
Description of Individual Diagram Blocks
Available Blocks
Block Function of block Status display in the block
Effect of TOGGLE ON/OFF key
Mod Gen
The internal modulation
signals are configured and
activated.
LF-sweep is configured and
activated.
Status of modulation
generator.
Active sweep
Switches the selected internal LF
generator on or off.
Modulation
The modulations are
configured and activated
Active modulations Switches the active modulation on or
off. The modulations are activated in
the respective menus.
RF
RF signal is configured and
activated.
State of RF output.
Activated sweeps.
Switches the RF output on or off.
Mod Gen block
The internal modulation sources are configured in this block. Also, the LF sweep can be activated here.
An internal LF generator is available as the internal source for the analog modulations AM, FM and PM.
Different modulation shapes - sine and rectangle - are offered.
The internal modulation signals are provided at the LF output at the front of the instrument. The LF
output signal and the modulations sources for the analog modulations AM, FM and PhiM can be
selected independently from each other.
A pulse generator (optional) provides single and double pulse modulation with selectable pulse widths
and periods.
The R&S SMB Signal Generator offers three different sweep types (frequency sweep, level sweep and
LF sweep) to be activated alternatively. Each type has 6 modes which differ with respect to the sweep
cycle mode (continuous, individual and step-by-step) and triggering mode (automatic, internal and
external). In the Mod Gen block, the LF sweep is configured. Frequency and Level sweep settings are
accessed via the RF block.
The status display in the block shows whether LF generator and/or a sweep are active.
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.
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