RXC-3080
Hardware Installation and User Guide
9000-0000-042 Revision 06
32 of 45
Genave Electronics
DTMF Decoder
The DTMF decoder circuit listens to the audio signal from the radio for “Touch-Tone” telephone digits.
When the digits are discovered, the circuit decodes them and sends to the microprocessor. Mark is the
amount of time that a tone is being transmitted and Space is the amount of time that the tone is not
being transmitted.
DTMF Decoder Characteristics
The DTMF decoder circuit can accept signals as fast as
18
milliseconds for both Mark and Space
timing.
A DTMF string can be anywhere between
2
characters long and
32
characters long.
The decoder circuit requires a gap between character strings of
600
milliseconds to decode the previous
string before it can accept another string of characters to decode.
Triggering RXC-3080 Off Of A DTMF String
Please refer to the Programming Guide 9000-0000-041 for more information
How To Enter/Adjust DTMF Strings
Please refer to the Programming Guide 9000-0000-041 for more information
DTMF Learn Mode
Please refer to the Programming Guide 9000-0000-041 for more information
“Live Look” (DTMF Digit Grabber)
Please refer to the Programming Guide 9000-0000-041 for more information
