Instrument Function
R&S
®
SMU200A
205Operating Manual 1007.9845.32 ─ 15
The reference oscillator is set in the lower area of the group menu "Frequency/Phase".
The upper areas are for setting the frequency and phase of the RF output signal. For
more information, see chapter 5.5.2.3, "Frequency Menu", on page 197 and chap-
ter 5.5.3, "Phase Settings", on page 199 respectively.
The menu is used to select the source, to enter the frequency of an external reference
signal and to adjust the reference frequency.
Source - Reference Oscillator
Selects the source of the reference frequency.
"Internal"
The internal reference signal of 10 MHz is used, comprising either the
calibrated or a user-defined adjustment value.
"External"
An external reference signal is used. The frequency of the external ref-
erence signal must be selected under "External Reference Frequency".
SCPI command:
[:SOURce]:ROSCillator:SOURce on page 775
Deactivate RF Output - Reference Oscillator
Determines if the RF output is switched off in case of a missing external reference signal
for selection external source.
If enabled, this setting ensures that no improper RF signal due to the missing external
reference signal is output and used for measurements.
In addition to the error message "Ext Ref missing", info "RF output deactivated" is indi-
cated.
This setting is not influenced by a reset.
SCPI command:
[:SOURce]:ROSCillator:EXTernal:RFOFf:STATe on page 774
External Reference Frequency
Selects the frequency of the external reference signal. An external reference signal with
a frequency of 5 MHz, 10 MHz or 13 MHz can be used.
SCPI command:
[:SOURce]:ROSCillator:EXTernal:FREQuency on page 773
Synchronization Bandwidth - RF Signal
(Source External only)
RF Signal and Analog Modulations - RF Block
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