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• Using MINimum or MAXimum to specify this frequency is not recommended
unless the external reference frequency is 20 kHz (MINimum) or 20 MHz
(MAXimum). In order for the digitizer processor to produce the intended sample
rates, the exact frequency value must be specified.
• Related Commands: SENSe:ROSCillator:SOURce, TRIGger:STARt:TIMer,
ARM:STARt:DELay
• *RST Condition: SENSe:ROSCillator:EXTernal:FREQuency 20 MHZ
Example Specifying the external reference oscillator frequency
SENS:ROSC:EXT:FREQ 5 MHZ External oscillator is 5 MHz
:SOURce
[SENSe[<chan>]]:ROSCillator:SOURce <source> selects the reference oscillator
source. The available sources are:
• CLK10: The VXIbus CLK10 (10 MHz) line.
• ECLTrg0: The VXIbus ECLTRG0 line.
• ECLTrg1: The VXIbus ECLTRG1 line.
• EXTernal2: The HP E1429’s front panel "Ext 2" BNC.
• INTernal: The internal 20 MHz oscillator.
Parameters
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
chan
numeric 1|2 none
source
discrete CLK10|EXTernal2|
ECLTrg0|ECLTrg1
INTernal
none
Comments • Executable when initiated: No
• Coupled command: Yes. This command is coupled to the TRIGger subsystem,
the OUTPut subsystem, and ARM:STARt:DELay.
• The reference oscillator is used to generate the sample rate and trigger delay.
[SENSe[<
chan
>]]:ROSCillator:SOURce
[SENSe[<
chan
>]]:ROSCillator Subsystem Command Reference 255