Lexicon 570 - Manual (Page 25)

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Dancer Communications, Inc.
X-modem Downloads
The most reliable way to transfer large amounts of data from the Messenger 570 system to a personal computer
is with the XMODEM file transfer protocol. Many communications programs (such as ProComm) support the
XMODEM protocol.
If a data error occurs during a file transfer (due to line noise, for example), XMODEM will detect the error and
correct it.
Once you initiate an XMODEM data transfer, you have 30 seconds to tell your communications program to
start the XMODEM transfer.
Compressed logs
Downloading a compressed log file is also possible. The data compression scheme used in the Messenger 570
system strips out all commas and other punctuation, and converts the data from ASCII decimal to binary. The
result is a data file, which is at least one-fourth its original size and transfers in one-fourth the time of the
original data file. To decompress the data to its original comma-delimited form, use the DOS decompression
utility “D-COMP,” which is included on the companion disk. The program will request the name of the input
file and output file. When the conversion is complete, you will be able to view the data with any text editor or
load the data into a spreadsheet program such as Lotus 1-2-3 or Excel.