Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 66)

daqAdcGetFreq
Also See: daqAdcSetFreq, daqAdcSetClockSource,
daqAdcSetRate
Format
daqAdcGetFreq(handle, freq)
Purpose
daqAdcGetFreq reads the sampling frequency of the pacer clock.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device from which to get the current frequency setting
freq PFLOAT A variable to hold the currently defined sampling frequency in Hz
Parameter Values
handle: obtained from the daqOpen function
freq: must be a valid pointer to a variable defined as a single precision (4-byte) floating point value
Returns
DaqError See Daq Error Table
Function Usage
This function can be used after calling the daqAdcSetScan and daqAdcSetRate functions to retrieve the
pacer clock’s sampling frequency. Valid values for the freq parameter can range from 0.2 mHz to 1.0 MHz,
but they are dependent on the device being used--see the discussion of actual scan rates in the entry for
daqAdcSetRate
. If using a DaqBook or DaqBoard(ISA) device, daqAdcGetFreq assumes that the
1 MHz/10 MHz jumper is set to the default position of 1 MHz.
This function is here for reference only, since it closely resembles the daqAdcSetRate
function with its mode parameter set to DarmFrequency. It is recommended that the
daqAdcSetRate
function be used to retrieve the current acquisition frequency setting.
Prototypes
C/C++
daqAdcGetFreq(DaqHandleT handle, PFLOAT freq);
Visual BASIC
VBdaqAdcGetFreq&(ByVal handle&, freq!)
Program References
None
4.2-10 Daq API Command Reference 988594 Programmer’s Manual