Remote Control Commands > SOURce Subsystem > SOURce:ROSCillator Subsystem > [:SOURce]:ROSCillator:EXTernal:SBANdwidth
[:SOURce]:ROSCillator:EXTernal:SBANdwidth <SBandwidth>

Sets the synchronization bandwidth for an external reference signal.

Parameters:
<SBandwidth>
WIDE| NARRow
NARRow

The synchronization bandwidth depends on the configuration of the instrument:

If the R&S SMA is equipped with the option R&S SMA-B22, the synchronization bandwidth is a few Hz. The internal 10-MHz OCXO is synchronized to the external signal. This setting is recommended if the phase noise of the external signal is worse than the phase noise of the internal OCXO.

Without option SMA-B22, the synchronization bandwidth is approx. 20 Hz.

WIDE

The synchronization bandwidth depends on the configuration of the instrument:

If the R&S SMA is equipped with the option R&S SMA-B22, the synchronization bandwidth is approximately 100 Hz. This mode is recommended for precise reference sources of high spectral purity. The internal 10-MHz OCXO is bypassed and the external signal synchronizes a 100-MHz reference oscillator directly.

Without R&S SMA-B22: Synchronization the bandwidth is approx. 750 Hz.

Without option R&S SMA-B22, the synchronization bandwidth is approx. 750 Hz. This mode is the standard mode. It is provided for using precise reference sources of high spectral purity.

Example: ROSC:SOUR EXT

Selects the external source.

ROSC:EXT:FREQ 10 MHz

Informs the instrument that the external reference has a frequency of 10 MHz.

ROSC:EXT:SBAN WID

Selects wideband setting for synchronization bandwidth.

Manual operation: See "Synchronization Bandwidth"

 


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