Reference Oscillator
R&S
®
SMA100B
274User Manual 1178.3834.02 ─ 05
"10 MHz, 100 MHz, 1GHz"
Selects the external reference frequency.
Remote command:
[:SOURce]:ROSCillator:EXTernal:FREQuency on page 640
Variable Reference Frequency
Option: R&S SMAB-K704
Sets the variably settable external reference frequency.
Remote command:
[:SOURce]:ROSCillator:EXTernal:FREQuency:VARiable on page 640
Synchronization Bandwidth
("External Reference Frequency = 10 MHz, 100 MHz or 1 GHz")
Selects the synchronization bandwidth for an external reference signal.
The resulting bandwidth is indicated with the parameter Nominal Synchronization
Bandwidth.
"Narrow"
The internal reference oscillator is synchronized to the external signal
with narrow bandwidth (< 1 Hz). This setting is recommended if the
phase noise of the external signal is worse than the phase noise of
the internal OCXO.
"Wide"
This mode is the recommended standard mode and for precise refer-
ence sources of high spectral purity.
Note: If the frequency of the external reference signal is outside the
locking range of the internal reference oscillator, spurs due to the dif-
ference of the internal and external reference frequency are gener-
ated in the reference PLL.
An error message is displayed.
For more information, see data sheet.
Remote command:
[:SOURce]:ROSCillator:EXTernal:SBANdwidth on page 640
Nominal Synchronization Bandwidth
Indicates the nominal synchronization bandwidth for the selected external reference
frequency and synchronization bandwidth.
Remote command:
[:SOURce]:ROSCillator:EXTernal:NSBandwidth? on page 641
Minimum Locking Range
Indicates the minimum locking range for the selected external reference frequency.
Remote command:
[:SOURce]:ROSCillator:EXTernal:MLRange? on page 641
External Tuning Active
For "Source > Internal", activates the EFC (external frequency control).
Reference Frequency Settings
To Next Page
Loading...
