clintbrad4d at earthlink.net
Tue Aug 13 11:03:23 PDT 2013
MDC-1200 (Motorola Data Communications) - aka "Stat-Alert,"
and/or "MDC-600" - is a Motorola two-way radio low-speed
data system using audio frequency shift keying, (AFSK).
MDC-600 uses a 600 baud data rate. MDC-1200 uses - you
guessed it - a 1200 baud data rate.
Mark and space tones are 1,200 Hz and 1,800 Hz. The data
are sent in bursts over the radio system's voice channel.
MDC signaling includes a number of features: unit ID,
status buttons, emergency button, selective inhibit, radio
check, and selective calling. These features are programmable
and could be used in any combination desired by the user.
In addition to Motorola, at least two other companies make
compatible base station decoders for MDC-1200. Motorola radios
with MDC options have an option allowing the radio to filter
out data bursts from the receive audio. Instead of hearing the
AFSK data, the user hears a short chirp from the radio speaker
each time a data burst occurs. (The user must turn on this
feature in the radio's option programming settings).
But you will not be using CHIRP to program your Motorola radios.
Clint Bradford K6LCS
Clint Bradford, K6LCS
More information about the chirp_users