Instrument Function
R&S
®
SMU200A
203Operating Manual 1007.9845.32 ─ 15
Note: If "Phase Continuous" is "Active" a setting of the "RF Frequency" outside the indi-
cated "Frequency Range" is only possible for mode Wide. A settings conflict is displayed.
SCPI command:
[:SOURce<hw>]:FREQuency:PHASe:CONTinuous:STATe on page 717
Frequency Range - RF Signal
(instruments with R&S SMU-B22 option only)
Selects the mode for determining the frequency range for the phase continuous signal.
The frequency range depends on the selected mode.
RF frequency
[MHZ]
Typ . range without
R&S SMU-B22
Range with R&S SMU-
B22 Narrow mode
Range with R&S SMU-
B22 Wide mode
f <= 6.6 125 kHz 625 kHz 2.5 MHz
6.6 < f <= 11.71875 7.813 kHz 39.625 kHz 156.25 kHz
11.71875 < f <= 23.4375 15.625 kHz 78.125 kHz 312.5 kHz
23.4375 < f <= 46.875 31.25 kHz 156.25 kHz 625 kHz
46.875 < f <= 93.75 62.5 kHz 312.5 kHz 1250 kHz
93.75 < f <= 187.5 125 kHz 625 kHz 2.5 MHz
187.5 < f <= 375 250 kHz 1250 kHz 5 MHz
375 < f <= 750 500 kHz 2.5 MHz 10 MHz
750 < f <= 1500 1 MHz 5 MHz 20 MHz
1500 < f <= 3000 2 MHz 10 MHz 40 MHz
3000< f <= 6000 4 MHz 20 MHz 80 MHz
"Narrow"
The available frequency range is smaller than with setting wide. It is
asymmetrical around the RF frequency set at the point of activating the
phase continuous settings (see table above).
In the narrow mode, a DDS frequency of 15 MHz to 20 MHz is used as
reference signal to the phase detector. This provides a tuning range of
5 MHz in the main synthesizer octave from 750 MHz to 1.5 GHz. When
activating the phase continuous settings, the current setting of the DDS
is anywhere between 15 and 20 MHz, e.g. 17 MHz. Thus, the distribution
around the center frequency most likely is asymmetrical, e.g. - 2 MHz
and + 3 MHz for the 17 MHz. Signal quality is high because the larger
mixing products are filtered by the low-pass filter (IF max. 20 MHz).
The narrow mode is recommended whenever possible due to the better
signal quality (spectral purity).
It is not possible to set frequencies outside the available frequency range.
RF Signal and Analog Modulations - RF Block
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