Download WINWCP User Guide - Spider

Values
4 byte floating point
x (Int(Nchans- 1)/8) + 1)
x 28
Waveform measurement and curve fitting
data storage array.
Data block
The data block contains the digitised signals, stored in the form of 16 bit binary integers. Each A/D sample takes up 2
bytes of space. Its size depends upon the number of data channels in the file
RDBsize = 2 x Nchans x Nsamples per chan
where Nchans is the number of data channels and Nsamples per chan is the number of A/D samples per channel. If there is more
than one A/D input channel, samples are interleaved within the data block. For example, for 2 channels,
Y01 Y11 Y02 Y12 ..... Y0nsamples Y1nsamples
Different laboratory interfaces supported by WinWCP return multichannel A/D samples in different orders. The channel
interleaving order for a data file is specified by the YOn= channel keyword in the file header block.
The calibrated signal level in the appropriate channel units can be reconstructed using information stored in the file header
and the record analysis blocks, using,
y cal =
Vmax
y adc
ADC max ⋅ YGn
where Vmax the maximum positive limit of the A/D converter voltage range (from record analysis block) ,ADCmax is
maximum A/D sample value at Vmax. (header block) and YGn is the calibration factor (Volts/channel units) for channel n
(header block).
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