Instrument Function > RF Block > Reference Oscillator > Reference Oscillator Settings
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 frequency to be used as the reference frequency, and determine a user-defined adjustment value.

The remote commands required to define the reference oscillator settings are described in "SOURce:ROSCillator Subsystem".

Source

Selects the source of the reference frequency.

See "Reference Oscillator", 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".

Remote command: 
 
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 reference 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.

Remote command: 
 
External Reference Frequency

Indicates the frequency of the external reference signal.

Remote command: 
 
Adjustment Active

Selects the adjustment mode.

"OFF"

Uses the calibrated internal reference frequency.

"ON"

Allows you to apply a deviation to the internal reference frequency, according to your requirements. To enter the value, use "Adjustment DAC Value".

Remote command: 
 
Adjustment DAC Value

Sets a user-defined deviation for the internal reference frequency. This value takes effect when it is activated with "Adjustment Active". "0" represents the calibrated state. The setting range depends on the reference oscillator type and its factory calibration value.

Note: A factory preset resets this setting to the calibration value of the instrument.

Remote command: 
 

 


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