Instrument Function
R&S
®
SMBV100A
156Operating Manual 1407.6062.32 ─ 08
5.4.2 RF Frequency
The value of the RF frequency is displayed in the header of the instrument's display
("Freq"). This field provides the direct input of the RF frequency. Alternatively, you can
enter the RF frequency in the "Frequency/Phase" dialog.
Be aware 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.
5.4.2.1 RF Frequency vs. RF Output Frequency
The signal generator offers the possibility, to take additional frequency modifications of
a downstream instrument into consideration, such as an offset set by a mixer, or a multiple
of the frequency by a frequency multiplier. The R&S SMBV indicates the resulting fre-
quency, including offset and multiplication factor in the header of the screen. I.e. the
indicated frequency corresponds to the frequency at the output of the downstream instru-
ment. However, the frequency at the RF output of your signal generator always corre-
sponds to the frequency set in the "Frequency/Phase" dialog.
In this dialog, you can also enter the values of the downstream instrument.
A set frequency offset is indicated by the "FREQ OFFSET" status message.
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)
5.4.2.2 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.
RF Signal and Analog Modulations - RF Block
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