ADDENDUM TO DR-1200TH2 OWNERS MANUAL The DR-1200TH2 is a dedicated High-Speed Data Radio. It is designed exclusively for packet use at 9600 baud. This is accomplished with the use of “True FM” (Frequency Modulation) circuitry. (Most “FM” radios today are actually Phase Modulated, and cannot be modified for High-Speed data transmission.) When installing and using your DR-1200TH2, please be aware of the following points: * Volume and Squelch controls do not affect packet output. * Voice transmission is not possible with the High-Speed Data Radio. Do not short the audio outputs together. Since the audio outputs are tied in directly to the I-F IC chip, a short would likely result in damage to this chip. = Interface connections will vary with different TNC’s. If you are in doubt about your TNC’s wiring diagram, please consult the manufacturer for details.