Technical data

492 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
24 System
Reference
Displays functions that control the external frequency reference.
Key Path: System
Remote Command:
There is no remote command for the system key. Refer to the remote commands in the
“Freq Ref" on page 492. These commands enables you to select an external frequency
reference source and specify a value.
Freq Ref
Specifies the frequency reference as being internal or external. If the frequency reference is
specified as internal, the frequency of the reference is automatically identified as being
10 MHz. If the frequency reference is specified as external, you must enter the frequency of
the external reference being used. If External Reference is selected, Ext Ref will appear on
the right side of the display.
The frequency of an external frequency reference is not automatically detected. If an
external frequency source is selected, the frequency of the source must be entered.
If Ext is selected, and you press Freq Ref, Ext will remain selected and the Ext reference
frequency will become the active function. If Freq Ref is pressed again, Int will become
selected (at 10 MHz). The Ext reference frequency is remembered and will be used again if
Ext is selected.
If the external reference is missing or out of range, or the frequency reference is unlocked,
the message “External reference missing or out of range”, will
appear on the display.
Key Path: System, Reference
State Saved: Not saved in Instrument State. Neither the external reference frequency
nor the state of this function (Int or Ext) are affected by factory preset or power cycle. Reset
to the factory default (Int, 10 MHz) by pressing System, Restore Sys Defaults.
Default: Internal, 10 MHz
Range: 1 MHz to 30 MHz
Remote Command:
[:SENSe]:ROSCillator:SOURce INTernal|EXTernal
[:SENSe]:ROSCillator:SOURce?
[:SENSe]:ROSCillator:EXTernal:FREQuency <value>