Digilent WaveForms Manual do Utilizador descarregar pdf (Página 41)

WaveForms™ SDK Reference Manual

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FDwfAnalogOutNodeAmplitudeInfo(

HDWF hdwf, int idxChannel, AnalogOutNode node, double *pvMin, double *pvMax)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- pvMin – Minimum amplitude level or modulation index.

- pvMax – Maximal amplitude level or modulation index.

The function above is used to retrieve the amplitude range for the specified channel-node on the instrument. The

amplitude is expressed in Volt units for carrier and in percentage units (modulation index) for AM/FM.

FDwfAnalogOutNodeAmplitudeSet(

HDWF hdwf, int idxChannel, AnalogOutNode node, double vAmplitude)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- vAmplitude – Amplitude of channel in Volts or modulation index in percentage.

The function above is used to set the amplitude or modulation index for the specified channel-node on the

instrument. With channel index -1, each enabled Analog Out channel amplitude (or modulation index) will be

configured to use the same, new option.

FDwfAnalogOutNodeAmplitudeGet(

HDWF hdwf, int idxChannel, AnalogOutNode node, double *pvAmplitude)

Parameters:

- hdwf – Open interface handle on a device.

- idxChannel – Channel index.

- node – Node index.

- pvAmplitude – Pointer to variable to receive amplitude value in Volts or modulation index in percentage.

The function above is used to get the currently set amplitude or modulation index for the specified channel-node

on the instrument.

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Digilent WaveForms Manual do Utilizador Página 41