Configuring the RF signal
R&S
®
SMM100A
305
User Manual 1179.1341.02 ─ 05
Readjust
Recalculates and adjusts the internal switch positions of the RF chain according to the
current level.
In "Sample & Hold" or "Sample & On" mode, the function also triggers a new sample
process. During the recalculation, the output level is blanked briefly.
Remote command:
User Variation
Defines and activates a user-defined step width for varying the RF frequency or RF
level with the rotary knob.
If disabled, the step width varies in steps of one unit at the cursor position.
Variation Active ← User Variation
Activates the set user-defined step width.
Remote command:
[:SOURce<hw>]:FREQuency:STEP:MODE
Variation Step ← User Variation
Sets the user-defined step width.
Remote command:
[:SOURce<hw>]:FREQuency:STEP[:INCRement]
[:SOURce<hw>]:POWer:STEP[:INCRement]
7.8
Local oscillator coupling
The "LO Coupling" function allows a distribution of the local oscillator signal in a way
that multiple RF signals can be derived from the same LO signal. Derivation from the
same LO signal is mandatory for minimizing the phase fluctuations between these RF
signals.
The R&S
SMM100A uses either the internal oscillator frequency for the LO signal, that
is the output signal of the internal synthesizer, or an external frequency source.
Connectors
●
The internal LO signal is output at the LO Out connector.
●
An external signal is fed in at the LO In connector.
The instrument cannot verify the frequency of the oscillator signal that is fed in. We
recommend that you fed in signal with exactly the same frequency as shown in the set-
tings dialog, see
See also
"To find the physical Location of the LO In/Out connectors"
Local oscillator coupling
