Wavecom W61PC V7.5.0 - Manual (Page 321)

WAVECOM Decoder W61PC/LAN Manual V7.5 WAVECOM Data Formats  311
A data package in the .WDA file contains the data of all data points of one line in the graphic. The data
points are stored in long values(4-bit type), that is 4 Bytes in the .WDA file contains the value of one data
point in the graphic.