Measurement Computing WaveBook rev.3.0 - Manual (Page 207)

WaveBook User’s Manual, 6-24-99 daqX API - Command Reference D-11
daqAdcSetFreq
DLL Function DaqAdcSetFreq(DaqHandleT handle, FLOAT freq);
C DaqAdcSetFreq(DaqHandleT handle, FLOAT freq);
Visual BASIC VbdaqAdcSetFreq&(ByVal handle&, ByVal freq!)
Delphi DaqAdcSetFreq(handle:DaqHandleT; freq:single)
Handle Handle to the device for which the ADC acquisition frequency is to be set. Parameters
Freq The sampling frequency in Hz
Valid values: 1000000.0 - 0.0002
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also DaqAdcGetFreq, daqAdcSetClockSource
Program References ADCEX1.C, DACEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ADCEX.PAS (Delphi)
Used With All devices
Description
daqAdcSetFreq
calculates and sets the frequency of the pacer clock using the frequency specified in Hz. The frequency is converted to
two counter values that control the frequency of the pacer clock (in this conversion, some resolution of the frequency may be lost).
daqAdcRdFreq
can be used to read the exact frequency setting of the pacer clock. daqAdcSetClock can be used to explicitly set the
two counter values of the pacer clock. The pacer clock can be used to control the sampling rate of the A/D converter.
daqAdcSetMux
DLL Function daqAdcSetMux(DaqHandleT handle, DWORD startChan, DWORD endChan, DaqAdcGain gain,
DWORD flags);
C daqAdcSetMux(DaqHandleT handle, DWORD startChan, DWORD endChan, DaqAdcGain gain,
DWORD flags);
Visual BASIC VBdaqAdcSetMux&(ByVal handle&, ByVal startChan&, ByVal endChan&, ByVal gain&, ByVal
flags&)
Delphi daqAdcSetMux(handle:DaqHandleT; startChan:DWORD; endChan:DWORD; const
gain:DaqAdcGain; flags:DWORD)
handle Handle to the device for which to configure the ADC channel scan group
startChan The starting channel of the scan group
endChan The ending channel of the scan group
gain The gain value for all channels
Parameters
flags Channel configuration flags in the form of a bit mask
DerrInvGain Invalid gain
DerrIncChan Invalid channel
Returns
DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqAdcSetScan, daqAdcGetScan
Program References DACEX1.C, DAQEX.FRM (VB)
Used With All devices
Description
daqAdcSetMux
sets a simple scan sequence of local A/D channels from startChan to endChan with the specified gain value. This
command provides a simple alternative to daqAdcSetScan if only consecutive channels need to be acquired. The flags parameter is
used to set channel dependent options. See ADC Flags Definition table for channel flags definitions.