Parameters

 

 

 

 

 

 

 

Parameter

Parameter

Range of

Default

 

 

Name

Type

Values

Units

 

 

 

 

 

 

 

 

channel

string

100 - 163

none

 

 

 

 

 

 

 

 

 

 

 

 

 

Comments

Channel must specify a single channel

Returned Value: returns one of NORM or INV. The type is string.

Send with VXIplug&play Function: hpe14XX_cmdString_Q(...)

[SENSe:]FREQuency:APERture

[SENSe:]FREQuency:APERture <aperture>,<ch_list> sets the time allowed to determine signal frequency and return a reading to the algorithm. When APERture is large enough to contain more than one signal period, the SCP measures and averages the number of signal periods that will fit within this APERture time. If the specified APERture is less than the input signal period, the SCP stretches the aperture in order to measure at least one signal period. This is known a Adaptive Aperture.

Parameters

 

 

 

 

 

 

 

Parameter

Parameter

Range of

Default

 

 

Name

Type

Values

Units

 

 

 

 

 

 

 

 

aperture

numeric (float32)

.001 to 1 (.001 resolution)

seconds

 

 

 

 

 

 

 

 

ch_list

string

100 - 163

none

 

 

 

 

 

 

 

 

 

 

 

 

 

Comments For APERture to effect the measurement, SENS:FREQ:MODE must be set to APERture.

If the channels specified are on an SCP that doesn’t support this function, an error will be generated. See your SCP’s User’s Manual for its capabilities.

Related Commands: SENS:FREQ:MODE, SENS:FREQ:NPERiods, SENS:FREQ:LIM:LOWer, SENS:FUNC:FREQ

*RST Condition: .001 sec

Send with VXIplug&play Function: hpe14XX_cmd(...)

Usage SENS:FREQ:APER .01,(@144)

set channel 44 aperture to

 

10msec

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 47

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Image 51
VXI VT1538A user manual SENSeFREQuencyAPERture, Send with VXIplug&play Function hpe14XXcmdStringQ