Instrument Function
R&S
®
SMC100A
122Operating Manual 1411.4060.32 ─ 09
Note that the displayed RF frequency in the header, and the RF output frequency,
entered in the "Frequency/Phase" dialog can be different, as explained in the following
section.
5.3.2.1 RF Frequency vs. RF Output Frequency
If you are working with a downstream instrument, e.g. a mixer or a frequency multiplier,
you can enter the related parameter value in the frequency settings dialog ("Offset",
"Multiplier").
The generator includes these parameters and displays the result in the "Freq" field in
the status bar, as if the downstream instrument and the generator were one unit. This
displayed frequency corresponds to the value at the RF output of the downstream
instrument. However, the frequency provided at the RF output of the signal generator
corresponds to the frequency value set in the "Frequency/Phase" dialog.
The instrument activates the "Freq Offset" icon in the status bar, when a frequency off-
set or multiplication factor is set.
The correlation between the RF frequency, the RF output frequency and the frequency
offset is as follows:
"Freq" (in header) = "RF output frequency" (Frequency in dialog) * "Multiplier" factor
(Multiplier in dialog) + "Freq offset" (Offset in dialog)
5.3.2.2 Setting the RF Frequency
To change the RF frequency, press the FREQ key and enter the desired frequency.
Changes to the RF frequency have an immediate effect (without confirmation with the
ENTER key) on the output signal.
RF Freq
Enters the RF frequency, considering the frequency offset.
Note: The SCPI command sets the level of the "Freq" display, that means an entered
frequency offset and multiplier factor are considered in the frequency value.
Remote command:
[:SOURce<hw>]:FREQuency[:CW|FIXed] on page 292
RF Block
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