RF Frequency R&S®SML / R&S®SMV03
1090.3123.12 E-6 4.2
Knob Step
Dec
imal The variation step size corresponds to the position of the digit cursor.
User User-defined, the variation step size is as entered under Knob Step
User.
Exclude from Recall
Off Normal setting. The stored frequency is loaded too when instrument
s
et
tings are loaded with the [RCL] key.
IEC/IEEE-bus command :SOUR:FREQ:RCL INCL
On The stored frequency is not loaded when instrument settings are
loaded, ie the current frequency setting is maintained.
IEC/IEEE-bus command :SOUR:FREQ:RCL EXCL
Frequency Offset
On the R&S SML / R&S SMV03 it is possible to enter an offset for subsequent units, if any, in the
Frequency menu. Such entries are taken into account in the frequency displayed in the header line,
which indicates the frequency of the RF signal at the output of the units in question (see Fig. 4-2).
The frequency of the RF output signal in the Frequency menu is calculated from the frequency displayed
in the header line and offset values as follows:
RF output frequency = frequency displayed in header line – offset
The entry of an offset causes a change of the frequency value displayed in the header line (the value
taking into account the offset is displayed). The value of the RF output frequency is displayed under
Frequency in the Frequency menu.
The entered offset remains active also for frequency sweeps.
Input value
Offset, L.O.
RF output frequency
(Frequency – Frequency menu)
Mixer
Input value Frequency
(Header line, display)
Fig. 4-2 Typical setups with frequency offset
Extended Divider Range
For frequencies of equal or greater than 77 MHz, the R&S SML / R&S SMV03 generates the RF signals
by means of frequency division or frequency multiplication. Below 77 MHZ the RF signals are normally
generated by frequency mixing. This results in good modulation capabilities but reduced single-side
phase noise. (see fig. "Typical SSB phase noise versus carrier frequency" in the datasheet). When the
extended divider range is activated excellent single-sideband phase noise values will be obtained in the
frequency range from approximately 9.5 MHz to 77 MHz but all other specifications of the R&S SML /
R&S SMV03 cannot be guaranteed for this operation mode.
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