10
Operation with the MS Series
The MT Series transcoders are fully compatible with the MS Series
encoders and decoders. Tying the ENC_SEL line high makes the
transcoder operate just like an MS Series encoder. Tying this line low
enables it to become an MS decoder or a transcoder, depending on how it
is set-up. This is described in detail in the Transcoder Operation section.
There are two important issues of note when using the transcoders with
the MS Series. First, only two of the MS baud rates are supported by the
MT; 9,600bps and 28,800bps. Second, the MS Series will not respond to
the advanced features of the MT, like the custom data and Targeted Device
Addressing. The main advantage offered by the MT over the MS is the
serial interface. This allows a number of advanced options to be realized.
Some other advantages are:
More users (60 vs. 40)
Automatic confirmation
The lower duty cycles (25% vs. 50%) of the MT Series allows for greater
range in countries like the United States that average transmitter output
power over time
The serial output on every packet instead of just once per receive
session
Allows existing receive stations using the MS Series decoder to be
upgraded to take advantage of the advanced features without having to
upgrade existing transmitter stations based on the MS Series encoder
Mixed MS / MT-based systems that allow cost savings for units that only
require unidirectional operation while other units require bidirectional
operation
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