Measurement Computing Personal Daq rev.6.0 - Manual (Page 143)

Personal Daq User’s Manual Appendix B, 887095 API Commands B-11
daqAdcSetFilter
DLL Function daqAdcSetFilter(DaqHandleT handle, DaqAdcFilterType filterType, DWORD
filterWindow);
C daqAdcSetFilter(DaqHandleT handle, DaqAdcFilterType filterType, DWORD
filterWindow);
Visual BASIC VbdaqAdcSetFilter&(ByVal handle&, ByVal filterType&, ByVal filterWindow&)
Delphi DaqAdcGetScan( handle:DaqHandleT; filterType:DaqAdcFilterType;filterWindow:DWORD
)
Parameters handle Handle to the device for which to get the current scan configuration.
filterType Specifies the type of analog filtering to be performed (currently DaftSWAvg)
filterWindow Specifies the number of scans over which to filter
Returns DerrNoError - No error (also, refer to API Error Codes on page page B-33)
See Also
Program References None
Used With PersonalDaq
Description
daqAdcSetFilter
sets the driver to perform filtering for analog channels. The filterType parameter specifies the filter method to
be used. Once this function is set, filtering will be performed on all analog channels in the scan group. Note that the filterWindow
parameter specifies the number of scans over which the filtering method is to be applied.
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: 100000.0 - 0.0002
Returns DerrNoError No error
See Also daqAdcGetFreq, daqAdcSetRate
Program References None
Used With All devices
Description
daqAdcSetFreq calculates and sets the frequency of the acquisition clock using the frequency specified in Hz. The frequency specified is
the rate at which channel scans are collected. This rate represents the interval at which each channel scan group is collected. The rate
specified must be less than or equal to the maximum frequency for which the currently defined channel scan configuration can run. The
maximum rate can be retrieved via the daqAdcGetFreq or daqAdcSetRate commands. If a rate is specified which is greater than the
maximum frequency at which the current channel configuration will allow the driver will automatically set the rate to the maximum allowable.