User's Manual

FUNCTIONS
CTCSS/CDCSS
The MT-900 series in the conventional mode will be capable of all 38 TIA/EIA CTCSS tones, plus up to
11 non-standard CTCSS tones. The MT-900 series will be capable of all TIA/EIA CDCSS codes, normal
and inverted.
Channels
The radio will be programmable for up to 32 channels. How the channels are distributed is dependent on
Dealer PC Programming.
Talk Around
Talk around is accomplished via the “T/A” button. This feature is dealer programmable on a per channel
basis if T/A is to be used or recalled during radio power up.
External Option Port/Connector
The MT-900 series will be capable of sending and receiving data information via a high density 15
connector located at the back of the radio. The high density 15 is to be wired to the option interface
internal to the radio and have the following ports:
1. Audio Output
2. TX Tone
3. Busy/SQ
4. Call
5. Monitor
6. PTT
7. RX_Audio_In
8. Alert Tone
9. Call LED
10. MIC Control
11. Audio Mute
12. TX Enable
13. Ground
14. SWB+_Out
15. Horn
P/C Programming
The MT-900 series will be capable of PC programming through the microphone jack for radio operational
parameters.
2-Tone Decode
The 2-tone decode capability shall be done in software and will not require an external option board. The
Motorola and GE format shall be used. This option shall be available on the dealer PC programming.