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Version 1.73 Copyright © 1997 Link Communications Inc. 1/18/97
computer or serial terminal has a DB-9 connector, you can use a straight through DB-9 cable
(not a null modem cable). If you are using a modem or TNC, note that pins 2 and 3 will have to
be swapped (a null modem adapter will do this). If you are using a modem or TNC, you will
probably have to set them up to make them work transparently - contact Link Communications
if you need more information about how to do this.
If everything you type shows up double on your serial screen like this "tteesstt", turn the local
echo off on your communications program.
The DVR is unavailable to the controller while it is executing a command entered from the
serial port. Because of this, most of the serial commands will time out if you do not respond
within about 10 seconds. Pressing the escape key will also get you out of most commands.
The default baud rate of 9600 baud works well for both uploading and downloading. Faster
baud rates are supported, but may not work reliably. Downloading may work at a higher baud
rate than uploading. When uploading, you may have to set the character pacing time (check the
ASCII transfer settings on your communications program) to avoid overruns. The line pacing
can be set relatively small, often to 0. When uploading at high baud rates, if the data that
appears on your screen has missing or incorrect characters but you are not getting error
messages, the data is probably being uploaded correctly and you can ignore the incorrect
characters that you see on the screen. Most errors in uploading are caused by trying to upload
to a track that is not empty. If the DVR is reset either by powering it down or by the serial reset
commands, the baud rate is automatically reset to 9600 baud.
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