VTI Instruments EX1000A - Vtex10 Xxa_Set_Filt_Freq

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EX10xxA Function Calls 241
vtex10xxA_set_filt_freq
FUNCTION PROTOTYPE
ViStatus_VI_FUNC vtex10xxA_set_filt_freq(ViSession vi, ViInt32 channels[],ViInt32 numChannels, ViReal64
filt_freq);
FUNCTION PARAMETERS
vi = contains a session handle to the instrument. This handle is obtained by the function and remains valid until the
session is closed.
channels[] = the list of channels to which to apply the filter frequency selection. The list of channels can include
channels not currently in the scan list and can be a subset of the channels in the scan list. Valid input values:
0 through 47.
numChannels = the length of the channels array. Valid input values: 1 through 48.
filt_freq = a real output value representing the frequency setting in hertz (Hz). Valid input values: 4, 15, 40, 100,
500, and 1000.
DATA ITEM RESET VALUE
filt_freq = 4.0 (for all channels)
DESCRIPTION
This function sets low-pass filter cutoff frequency of specified channels. Supported frequencies are 4 Hz, 15 Hz,
40 Hz, 100 Hz, 500 Hz, and 1 kHz. If a value other than the valid frequencies are used, this function round up to the
next highest valid frequency. If a number greater than 1000 is used, the filter is set to 1 kHz.
NOTE For the EX1048, the only available frequencies are 4 Hz and 1 kHz.
EXAMPLE
// set channels 0-4 for 4 Hz
ViInt32 low_channels[5] = { 0, 1, 2, 3, 4 };
vtex10xxA_set_filt_freq(vi, low_channels, 5, 4.0);
// set channels 5-8 for 1 kHz
ViInt32 high_channels[4] = { 5, 6, 7, 8 };
vtex10xxA_set_filt_freq(vi, high_channels, 4, 1000.0);