Rohde & Schwarz SGS100A - Page 87

Signal Generator Settings
R&S
®
SGS100A
85User Manual 1173.9105.02 ─ 12
Ref. Oscillator Source/Ext Ref On/Off
Determines whether the internal built-in oscillator (TXCO or OXCO) is used as a refer-
ence source or if an external reference is used. The internal reference oscillator OCXO
requires the additional option R&S SGS-B1.
To feed in an external instrument reference, use the input connector [REF/LO IN]. To
output the reference frequency at the output [REF/LO OUT], select "SGMA-GUI >
Instrument Name > Ref. Oscillator > REF/LO Output > REF".
See also Chapter 9.4, "How to Configure the Reference Oscillator Source",
on page 152.
"Int"
The internal reference signal of 10 MHz is used.
"Ext"
An external reference signal is used. The frequency of the external
reference signal must be selected with the parameter "SGMA-GUI >
Instrument Name > Ref. Oscillator > Ex. Ref. Input Frequency".
Remote command:
[:SOURce]:ROSCillator:SOURce on page 260
Ext. Ref. Input Frequency
Available only for "Source > Ext".
Selects the frequency of the external reference signal.
Remote command:
[:SOURce]:ROSCillator:EXTernal:FREQuency on page 259
Synchronization Bandwidth
Available only for "Source > Ext".
Selects the synchronization bandwidth for an external reference signal. The wideband
setting is provided for using good reference sources of high spectral purity.
"Wide"
Synchronization bandwidth is app. 250 Hz.
"Narrow"
Synchronization bandwidth is app. 40 Hz.
Reference Oscillator