Instrument Function
R&S
®
SMB100A
143Operating Manual 1407.0806.32 ─ 21
Input and output connectors of the reference frequency
The appropriate connectors are located at the rear panel, see "REF IN" on page 24
and "REF OUT" on page 24.
5.3.4.1 Reference Oscillator Settings
To access the settings dialog for configuring the reference signal, perform one of the
following:
●
In the block diagram, select "RF > config... > RF Frequency > Reference Oscillator"
●
Press the MENU key and select "RF > RF Frequency > Reference Oscillator"
●
Press the SETUP key and select "Setup > System > Reference Oscillator"
In the "Reference Oscillator Settings" dialog, you can select the signal source and fre-
quency to be used as the reference frequency, and determine a user-defined adjust-
ment value.
The remote commands required to define the reference oscillator settings are descri-
bed in Chapter 7.13.14, "SOURce:ROSCillator Subsystem", on page 405.
Source
Selects the source of the reference frequency.
See Chapter 5.3.4, "Reference Oscillator", on page 141, which provides an overview of
the different test scenarios for configuring the reference frequency.
"Internal"
Uses the internal 10 MHz reference signal, either with the calibrated
or a user-defined adjustment value.
"External"
Uses an external reference signal.
The frequency of the external reference signal must be selected
under "External Reference Frequency" on page 144.
Remote command:
[:SOURce]:ROSCillator:SOURce on page 407
Deactivate RF Output (if external reference is missing)
Turns the RF output off when the external reference signal is selected, but no signal is
supplied.
This function prevents that no improper RF signal due to the missing external refer-
ence signal is used for measurements. A message indicates that the external signal is
missing and the RF output is deactivated.
This setting is not affected by a reset.
RF Block
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