Btn55xxx_FetchTimeArray Function


Boonton55xxx IVI Driver Reference

Btn55xxx_FetchTimeArray Function
AutoMeasurements See Also

Returns an array of the current automatic timing measurements performed on a periodic pulse waveform. Measurements performed are: the frequency, period, width, offtime and duty cycle of the pulse waveform, and the risetime and falltime of the edge transitions. For each of the measurements to be performed, the appropriate items to be measured must within the trace window. Pulse frequency, period, offtime and duty cycle measurements require that an entire cycle of the pulse waveform (minimum of three edge transitions) be present. Pulse width measurement requires that at least one full pulse is visible, and is most accurate if the pulse width is at least 0.4 divisions. Risetime and falltime measurements require that the edge being measured is visible, and will be most accurate if the transition takes at least 0.1 divisions. It is always best to have the power meter set on the fastest timebase possible that meets the edge visibility restrictions. Set the trace averaging as high as practical to reduce fluctuations and noise in the pulse timing measurements. Note that the timing of the edge transitions is defined by the settings of the SENSe:PULSe:DISTal, :MESIal and :PROXimal settings; see the descriptions for those commands. Units are the same as the channel's units.

Function Tree Node: \Boonton55xxx\Instrument Specific\Measurements\AutoMeasurements\Fetch Time Array

Visual C++

ViStatus Btn55xxx_FetchTimeArray(
ViSession Vi,
ViConstString Channel,
ViReal32* Frequency,
ViInt32* FrequencyValid,
ViReal32* Period,
ViInt32* PeriodValid,
ViReal32* Width,
ViInt32* WidthValid,
ViReal32* Offtime,
ViInt32* OfftimeValid,
ViReal32* DutyCycle,
ViInt32* DutyCycleValid,
ViReal32* Risetime,
ViInt32* RisetimeValid,
ViReal32* Falltime,
ViInt32* FalltimeValid,
ViReal32* EdgeDelay,
ViInt32* EdgeDelayValid,
ViReal32* Skew,
ViInt32* SkewValid
);

Parameters

The ViSession handle that you obtain from the IviDriver_init or IviDriver_InitWithOptions function. The handle identifies a particular instrument session.

The physical or virtual repeated capability identifier. Pass VI_NULL or empty string if operation does not apply to a repeated capability.For valid values, see the Channel repeated capability.

The number of cycles of a repetitive signal that take place in one second (Pulse Repetition Frequency).

The time a repetitive pulse is off. (Equal to the pulse period minus the pulsewidth).

The interval between the first signal crossing of the proximal line to the first signal crossing of the distal line.

The interval between the last signal crossing of the distal line to the last signal crossing of the proximal line.

Time offset from the trigger reference to the first mesial transition level of either slope on the waveform.

Return Value

Requirements

Supported Models

Defined Values For Parameter FrequencyValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter PeriodValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter WidthValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter OfftimeValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter DutyCycleValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter RisetimeValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter FalltimeValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter EdgeDelayValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Defined Values For Parameter SkewValid

Name	Description
BTN55XXX_VAL_COND_CODE_MEASUREMENT_STOPPED	-1 Measurement is STOPPED. Value returned is not updated.
BTN55XXX_VAL_COND_CODE_ERROR	Error return. Measurement is not valid.
BTN55XXX_VAL_COND_CODE_UNDERRANGE	An Under-range condition exists.
BTN55XXX_VAL_COND_CODE_OVERRANGE	An Over-range condition exists.
BTN55XXX_VAL_COND_CODE_NORMAL	1 Normal return. No error.

Syntax