Rohde & Schwarz SMU200A - Reference Oscillator

Instrument Function
R&S
®
SMU200A
204Operating Manual 1007.9845.32 ─ 15
"Wide"
The wide mode provides a larger frequency range. The frequency range
is symmetrical around the RF frequency set at the point of activating the
phase continuous settings (see table above).
Due to an additional divider by 8 in the PLL the signal quality is reduced
in this mode. At some frequencies non -harmonics will be present.
Setting frequencies outside the available frequency range is possible,
however, a settings conflict is indicated. The usable overrange depends
on the currently set RF frequency, e.g. at 1 GHz it reaches from 850 MHz
to 1030 MHZ.
SCPI command:
[:SOURce<hw>]:FREQuency:PHASe:CONTinuous:MODE on page 716
Frequency Range in [Hz] - RF Signal
(instruments with R&S SMU-B22 option only)
Displays the frequency range for phase continuous settings. The available frequency
range depends on the mode selection ("Narrow" or "Wide").
The range indication is active even if phase continuous frequency settings are not yet
activated. Thus, the desired range can be determined before activating the function.
SCPI command:
[:SOURce<hw>]:FREQuency:PHASe:CONTinuous:HIGH on page 716
[:SOURce<hw>]:FREQuency:PHASe:CONTinuous:LOW on page 716
5.5.4 Reference Oscillator
In the internal reference mode the internal reference signal is available at the REF
OUT connector. The frequency of the internal reference signal is permanently set to 10
MHz.
The frequency of the internal reference oscillator can be impaired by means of the EXT
TUNE input (AUX I/Q connector at rear of instrument) (Frequency Adjustment; see data
sheet for technical information).
External impairment is possible in both "Adjustment State" states (On or Off).
In the external reference mode, an external signal with selectable frequency and defined
level must be input at the REF IN connector. This signal is output at the REF OUT con-
nector. The "EXT REF" status message appears in the display header.
The reference frequency setting is effective for both paths.
The settings of the reference oscillator are not influenced by an instrument preset
("PRESET" key).
5.5.4.1 Reference Oscillator Dialog
To open the "Reference Oscillator" dialog, select "RF/A Mod > Configure > Reference
Oscillator" or use the MENU key under "RF/A Mod".
RF Signal and Analog Modulations - RF Block