274 Chapter 4
Utility and Control/Sweep Functions
Utility Functions
Utility and Control/Sweep Functions
Mode All
Remote Command [:SENSe]:ROSCillator:SOURce INTernal|EXTernal
[:SENSe]:ROSCillator:SOURce?
Example ROSC:SOUR EXT selects the external reference.
Notes The only Frequency value available for the Internal
Reference is 10 MHz. For the External Reference, the
possible Frequency values are 0.5 Hz | 1 MHz | 2.1048 MHz
| 4.95 MHz | 10 MHz | 13 MHz | 15 MHz | 19.6608 MHz.
See details in next table.
Preset INTernal
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.
Key Path
System, Freq/Time Ref
Mode All
Remote Command [:SENSe]:ROSCillator:EXTernal:FREQuency 0.5HZ |
1MHZ | 2.1048MHZ | 4.95MHZ | 10MHZ | 13MHZ | 15MHZ
| 19.6608MHZ
[:SENSe]:ROSCillator:EXTernal:FREQuency?
Example ROSC:EXT:FREQ 13 MHz
sets the external reference frequency to 13 MHz, but does not
select the external reference.
ROSC:SOUR EXT selects the external reference.
Notes Only the values shown are valid External Frequencies. You
may specify these in numeric form, but they are interpreted
as an enumeration and an error will result if the value does
not match one of the choices in the list.
Remote Command Notes Before switching to the external reference source, specify the
frequency of the external reference that you plan to use.
Preset Not affected by Preset.
State Saved Not Saved in Instrument State. Neither the external
reference frequency nor the state of this function (Int or Ext)
are affected by Preset or power cycle.
Min 1 MHz
The external even second reference is set remotely by
selecting 0.5 Hz.
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