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Appendix A: Advanced Installation
This appendix gives you additional information on installation and configuration beyond
that given in the chapter on “Installing your MT1200”. We assume you have already
read that chapter.
Precautions
The MT1200 is grounded through its connections to your transceiver, computer, and
power supply. Make sure your transceiver is properly grounded and your computer has
equal ground potential. Follow the grounding instructions in your transceiver manual.
The multi-conductor cable provided with your MT1200 is shielded. If you use other
cabling, be certain it is shielded. We do not recommend the use of unshielded RS232
ribbon cable in an amateur radio environment.
Cable Wiring
Caution: Make sure the power to the transceiver, computer, and MT1200 is OFF before
connecting any cables.
The MT1200 uses a standard RS232 serial port with a DSUB-25 connector configured
as DCE equipment.
Diagram of Pin Numbers on DSUB-9 Connector
The following diagram shows the pin numbering on the DSUB-9 connector looking at
the front of the MT1200:
Connecting to the Computer (Front panel DSUB-9)
The MT1200 communicates with the computer using RS232 signaling. This is
compatible with PC compatible computers, Macintosh, dumb terminal, and most other
terminal devices. If your computer or terminal uses TTL levels (such as the Commodore
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