[SENSe[<chan>]]:ROSCillator

Subsystem Syntax

The SENSe:ROSCillator subsystem controls the reference oscillator source and frequency used to generate sample rates for taking measurements.

[SENSe[<chan>]] :ROSCillator :EXTernal

:FREQuency <frequency> :SOURce <source>

Since the triggering and timebase circuits of the HP E1429 are shared between both sensing channels, the settings for [SENSe[<chan>]]:ROSCillator are the same for both values of chan (1 and 2). Setting SENSe1:ROSCillator values will also set SENSe2:ROSCillator values and vice versa.

:EXTernal:FREQuency

[SENSe[<chan>]]:ROSCillator:EXTernal:FREQuency <frequency> indicates to

the HP E1429 the frequency of an external reference oscillator signal. The SENSe:FREQuency subsystem uses this value to generate the sample rate when SENSe:ROSCillator:SOURce is set to EXTernal, ECLTrg0, or ECLTrg1.

Parameters

 

Parameter

Parameter

Range of

 

Default

 

Name

Type

Values

 

Units

 

 

 

 

 

 

 

chan

numeric

12

 

none

 

 

 

 

 

 

 

frequency

numeric

10 KHz through 20 MHz

 

Hz

 

 

 

MINimumMAXimum

 

 

 

 

 

 

 

 

 

MINimum selects 10 KHz; MAXimum selects 20 MHz.

 

 

 

 

 

 

Comments Executable when initiated: No

 

 

 

Coupled command: Yes. This command is coupled to the commands in the TRIGger subsystem.

Indicating an incorrect frequency for an external reference oscillator will cause the sample rate and trigger delay to be incorrect.

The amplitude of the external reference signal should be a TTL level: low = 0.0V to 0.8V, high = 2.5V to 5.0V.

254 Command Reference

[SENSe[<chan>]]:ROSCillator Subsystem

Page 254
Image 254
HP E1429A manual SENSechanROSCillator, EXTernalFREQuency