Contents
- Index
COM API - Read Data Functions
Functions used to read data and status from the analyzer:
General Status
Peak Search Operations
Distortion Readings
Total Power Readings
Marker Readings
Conversion Operations
Time Series Data
Spectral Data
Phase Data
Leq Data
Misc
General Status
IsRunning ( int *runStatus )
Description: Determine if the analyzer is currently running, or recording
Parameters: runStatus = pointer to receive the analyzer run status (0 = stopped, 1 = running or recording)
Return: S_OK = success, E_FAIL
GetCurrentFileTime( long channel, float *seconds )
Description: Get the current time in the file for the specified channel
Parameters: channel = 0 - 15; seconds = pointer to variable to receive the time value in seconds
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTotalFileTime( long channel, float *seconds )
Description: Get the total time in the file for the specified channel
Parameters: channel = 0 - 15; seconds = pointer to variable to receive the time value in seconds
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetCurrentFileSample( long channel, unsigned long *sample )
Description: Get the current sample position in the file for the specified channel
Parameters: channel = 0 - 15; sample =pointer to variable to receive the sample position
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTotalFileSamples( long channel, unsigned long *samples )
Description: Get the total number of samples in the file for the specified channel
Parameters: channel = 0 - 15; samples = pointer to variable to receive the total samples value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetFFTCount( long channel, long *fftcount )
Description: Get the number of FFTs that have been performed since run or record were last pressed
Parameters: channel = 0 - 15; fftcount - pointer to variable to receive the the fft count
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetOverloadCount( long channel, long *overloadcount )
Description: Get the number of Overload conditions (clipping) that have been detected since run or record were last pressed
Parameters: channel = 0 - 15; overloadcount - pointer to variable to receive the the overload count
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTriggerCount( long *trigger_count )
Description: Get the number of triggers that have occurred since run or record were last pressed
Parameters: trigger_count - pointer to variable to receive the the trigger count
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Peak Search Operations
GetPeakFrequency( long channel_ext, float *freq )
Description: Get the peak frequency in the total span for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
freq = pointer to variable to receive the peak frequency
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakFrequencyNth( long channel_ext, long peak_number, float *freq )
Description: Get the Nth peak frequency in the total span for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
peak_number = 0 - 10; freq = pointer to variable to receive the peak frequency
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakFrequencyNthSpan( long channel_ext, long peak_number, float startHz, float stopHz, float *freq )
Description: Get the Nth peak frequency in the specified span for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
peak_number = 0 - 10; startHz = span start frequency; stopHz = span stop frequency;
freq = pointer to variable to receive the peak frequency
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakAmplitude( long channel_ext, float *amplitude )
Description: Get the peak amplitude in the total span for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
amplitude = pointer to variable to receive the peak amplitude
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakAmplitudeNth( long channel_ext, long peak_number, float *amplitude )
Description: Get the amplitude of the Nth peak in the total span for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
peak_number = 0 - 10; amplitude = pointer to variable to receive the peak amplitude
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakAmplitudeNthSpan( long channel_ext, long peak_number, float startHz, float stopHz, float *amplitude )
Description: Get the amplitude of the Nth peak in the specified span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
peak_number = 0 - 10; startHz = span start frequency; stopHz = span stop frequency;
amplitude = pointer to variable to receive the peak amplitude
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldFrequency( long channel_ext, float *freq )
Description: Get the maximum frequency in the peak hold spectrum for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
freq = pointer to variable to receive the peak hold frequency
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldAmplitude( long channel_ext, float *amplitude )
Description: Get the maximum amplitude in the peak hold spectrum for the specified channel
Parameters: channel_ext = 0 - 15 for main channels, 17 - 32 for composite channels;
amplitude = pointer to variable to receive the peak hold amplitude
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Total Power Readings
GetTotalPower( long channel_ext, long weighting, float *power )
Description: Get the total power in the total span for the specified channel and weighting
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
weighting: 0 = Flat, 1 = A, 2 = B, 3 = C
power = pointer to variable to receive the total power value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTotalPowerSpan( long channel_ext, long weighting, float startHz, float stopHz, float *power )
Description: Get the total power for the specified frequency span for the specified channel and weighting
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
weighting: 0 = Flat, 1 = A, 2 = B, 3 = C
startHz = span start frequency; stopHz = span stop frequency;
power = pointer to variable to receive the total power
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldTotalPower( long channel_ext, long weighting, float *power )
Description: Get the total power in the peak hold spectrum for the specified channel and weighting
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
weighting: 0 = Flat, 1 = A, 2 = B, 3 = C
power = pointer to variable to receive the peak hold total power value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Distortion Readings
GetTHD( long channel_ext, float *thd )
Description: Get the THD over the total span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
thd = pointer to variable to receive the THD value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTHDSpan( long channel_ext, float startHz, float stopHz, float *thd )
Description: Get the THD over the specified frequency span and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = span start frequency; stopHz = span stop frequency;
thd = pointer to variable to receive the THD value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTHD_N( long channel_ext, float *thd_n )
Description: Get the THD+N over the total span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
thd_n = pointer to variable to receive the THD+N value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTHD_NSpan( long channel_ext, float startHz, float stopHz, float *thd_n )
Description: Get the THD+N over the specified frequency span and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = span start frequency; stopHz = span stop frequency;
thd_n = pointer to variable to receive the THD+N value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetIMD( long channel_ext, float *imd )
Description: Get the IMD over the total span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
imd = pointer to variable to receive the IMD value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSNR( long channel_ext, float *snr )
Description: Get the SNR over the total span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
snr = pointer to variable to receive the SNR value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSNRSpan( long channel_ext, float startHz, float stopHz, float *snr )
Description: Get the SNR over the specified frequency span and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = span start frequency; stopHz = span stop frequency;
snr = pointer to variable to receive the SNR value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSINAD( long channel_ext, float *sinad )
Description: Get the SINAD over the total span for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
sinad = pointer to variable to receive the SINAD value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSINADSpan( long channel_ext, float startHz, float stopHz, float *sinad )
Description: Get the SINAD over the specified frequency span and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = span start frequency; stopHz = span stop frequency;
sinad = pointer to variable to receive the SINAD value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Marker Readings
GetMarkerFrequency( long channel_ext, long marker, float *freq )
Description: Get the frequency at the specified marker
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
marker = 1 - 8;
freq = pointer to variable to receive the frequency value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetMarkerAmplitude( long channel_ext, long marker, float *amplitude )
Description: Get the amplitude at the specified marker
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
marker = 1 - 8;
amplitude = pointer to variable to receive the amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Conversion Operations
ConvertTimeToSample( long channel, float time_seconds, unsigned long *sample )
Description: Convert from seconds to sample position for the specified channel
Parameters: channel = 0 - 16; time_seconds = time value to convert
sample = pointer to variable to receive the sample position
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
ConvertSampleToTime( long channel, unsigned long sample, float *time_seconds )
Description: Convert from sample position to time for the specified channel
Parameters: channel = 0 - 16; sample = sample position to convert
time_seconds = pointer to variable to receive the time in seconds
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Time Series Data
GetTimeSeriesValueFromTime( long channel, float time_seconds, float *value )
Description: Get the time series amplitude value a the specified time
Parameters: channel = 0 - 16; time_seconds = file position time in seconds
value = pointer to variable to receive the time series amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTimeSeriesValueFromSample( long channel, unsigned long sample, float *value )
Description: Get the time series value a the specified sample position
Parameters: channel = 0 - 16; sample = file position in samples
value = pointer to variable to receive the time series amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetMaxTimeSeriesValueInSegment( long channel, unsigned long startSample, unsigned long stopSample, float *value )
Description: Get the maximum time series value in the specified time segment
Parameters: channel = 0 - 16;
startSample = time segment start position in samples;
stopSample = time segment stop position in samples;
value = pointer to variable to receive the maximum time series amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetMinTimeSeriesValueInSegment( long channel, unsigned long startSample, unsigned long stopSample, float *value )
Description: Get the minimum time series value in the specified time segment
Parameters: channel = 0 - 16;
startSample = time segment start position in samples;
stopSample = time segment stop position in samples;
value = pointer to variable to receive the minimum time series amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTimeSeriesFromFile( long channel, SAFEARRAY __RPC_FAR * __RPC_FAR *psaTimes, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of time series data for the specified channel
Parameters: channel = 0 - 16;
psaTimes = pointer to array of time values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTimeSeriesFromFileSegmentSample( long channel, unsigned long startSample, unsigned long stopSample, SAFEARRAY __RPC_FAR * __RPC_FAR *psaTimes, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of time series data for the specified time segement and channel
Parameters: channel = 0 - 16;
startSample = start sample of time series segment;
stopSample = stop sample of time series segment;
psTimes = pointer to array of time values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTimeSeriesFromFileSegmentTime( long channel, float startSecs, float stopSecs, SAFEARRAY __RPC_FAR * __RPC_FAR *psaTimes, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of time series data for the specified time segement and channel
Parameters: channel = 0 - 16;
startSecs = start time of time series segment;
stopSecs = stop time of time series segment;
psaTimes = pointer to array of time values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetMaxValueInTriggerSeries( long channel, float *value )
Description: Get the maximum time series value in the block of trigger samples. The trigger block length is equal to the FFT size for the specified channel.
Parameters: channel = 0 - 16;
value = pointer to variable to receive the maximum amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetMinValueInTriggerSeries( long channel, float *value )
Description: Get the minimum time series value in the block of trigger samples. The trigger block length is equal to the FFT size for the specified channel.
Parameters: channel = 0 - 16;
value = pointer to variable to receive the minimum amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetTriggerTimeSeries( long channel, SAFEARRAY __RPC_FAR * __RPC_FAR *psaTimes, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of time series data containing the block of trigger samples. The trigger block length is equal to the current FFT size.
Parameters: channel = 0 - 16;
psaTimes = pointer to array of time values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetRPM( long channel, float *rpm )
Description: Get the current RPM from the tachometer channel
Parameters: channel = 0 - 16 for main channels
rpm = pointer to variable to receive the RPM value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Spectral Data
GetSpectrumMinFrequency( long channel_ext, float *freq )
Description: Get the minimum available frequency in the spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
freq = pointer to variable to receive the frequency value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSpectrumMaxFrequency( long channel_ext, float *freq )
Description: Get the maximum available frequency in the spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
freq = pointer to variable to receive the frequency value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSpectrumValue( long channel_ext, float freqHz, float *value )
Description: Get the amplitude value of the spectral data at the specified frequency and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
freqHz = frequency to read the amplitude
value = pointer to variable to receive the amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSpectrum( long channel_ext,SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetSpectrumInSpan( long channel_ext, float startHz, float stopHz, SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = start frequency of selected span;
stopHz = stop frequency of selected span;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldSpectrumValue( long channel_ext, float freqHz, float *value )
Description: Get the peak hold amplitude value of the spectral data at the specified frequency and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
freqHz = frequency to read the amplitude
value = pointer to variable to receive the amplitude value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldSpectrum( long channel_ext,SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of peak hold spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPeakHoldSpectrumInSpan( long channel_ext, float startHz, float stopHz, SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of peak hold spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = start frequency of selected span;
stopHz = stop frequency of selected span;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of amplitude values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetComplexSpectrum( long channel_ext,SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaDataR, SAFEARRAY __RPC_FAR * __RPC_FAR *psaDataI )
Description: Get an array of complex spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
psaFrequencies = pointer to array of frequency values
psaDataR = pointer to array of real component of complex values
psaDataI = pointer to array of imaginary component of complex values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetComplexSpectrumInSpan( long channel_ext, float startHz, float stopHz, SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaDataR, SAFEARRAY __RPC_FAR * __RPC_FAR *psaDataI)
Description: Get an array of complex spectral data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = start frequency of selected span;
stopHz = stop frequency of selected span;
psaFrequencies = pointer to array of frequency values
psaDataR = pointer to array of real component of complex values
psaDataI = pointer to array of imaginary component of complex values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Phase Data
GetPhaseValue( long channel_ext, float freqHz, float *value )
Description: Get the phase value at the specified frequency and channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
freqHz = frequency to read the phase
value = pointer to variable to receive the phase value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPhase( long channel_ext,SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of phase data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of phase values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetPhaseInSpan( long channel_ext, float startHz, float stopHz, SAFEARRAY __RPC_FAR * __RPC_FAR *psaFrequencies, SAFEARRAY __RPC_FAR * __RPC_FAR *psaData )
Description: Get an array of phase data for the specified channel
Parameters: channel_ext = 0 - 16 for main channels, 17 - 32 for composite channels;
startHz = start frequency of selected span;
stopHz = stop frequency of selected span;
psaFrequencies = pointer to array of frequency values
psaData = pointer to array of phase values
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Leq Data
GetLeqValues( long channel, float *LeqT, float *Leq, float *Lsel, float *Lpk, float *Lmax, float *Lmin, float *L10, float* L50, float *L90 )
Description: Get the Leq (Equivalent Noise Level) values for the specified channel
Parameters: channel_ext = 0 - 16
LeqT = pointer to the equivalent noise level converted to the user specified "reference time period".
Leq = pointer to the equivalent noise level for the selected time segment.
Lsel = pointer to the equivalent noise level converted to a 1 second period.
Lpk = pointer to the peak level for the selected time segment. No averaging is used for this parameter.
Lmax = pointer to the maximum level for the selected data.
Lmin = pointer to the minimum level for the selected data.
L10 = pointer to the level exceeded 10% of the time.
L50 = pointer to the level exceeded 50% of the time.
L90 = pointer to the level exceeded 90% of the time.
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
Misc
GetMetadata( long channel, BSTR* metadata )
Description: Get the metadata text from the current wafe file. Wave file must be open for this function to suceed.
Parameters: channel = 0 -16; metadata - up to 2000 characters max of ascii text
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter
GetCSEL( long channel, float *value )
Description: Get the current value of the cSEL utility (utility must be open)
Parameters: channel = 0 - 16
value = pointer to variable to receive the value
Return: S_OK = success, E_FAIL = unsuccessful, E_INVALIDARG = invalid parameter