Ritron, Inc.
505 West Carmel Drive • Carmel, IN 46032
P.O. Box 1998 • Carmel, IN 46082
Ph: 317-846-1201 • Fax: 317-846-4978
ritron@ritron.com • web: www.ritron.com
Email:
Publication No. 14500061
LM-DTMF Programming Instructions
Ritron model LM-DTMF is a factory installed DTMF decoder for the Loudmouth™ Wireless PA System receiver. With an
LM-DTMF installed, the Loudmouth
speaker. After the DTMF code has been successfully decoded, the PC programmable Two-Tone Reset Time sets the
length of time the Loudmouth™ receiver can go without receiving a signal before the DTMF code is once again required for
access. Factory default Two-Tone Reset Time is 5 seconds.
NOTE: The Loudmouth™ receiver should NOT be programmed for 2-Tone or Selcall decode when the LM-DTMF
decoder is installed.
The LM-DTMF can be programmed for up to 15 DTMF characters (0-9, * and # signs) to create a unique Loudmouth
access code. The decoder has been programmed for code 1-2-3 from the factory. The LM-DTMF decoder can be
programmed by two methods, using a DTMF Touch-Tone telephone or over–the-air programming using a DTMF equipped
radio that operates on the Loudmouth
Programming the LM-DTMF with a DTMF Touch-Tone Telephone
1. Remove the Loudmouth™ receiver front cover and apply power using the RPS-1A power supply.
2. Put the Loudmouth™ receiver into Field Programming mode per the instructions in the Loudmouth™ User Manual.
3. Plug a Touch-Tone telephone into the RJ-11 jack on the LM-DTMF decoder board.
4. Place the LM-DTMF program jumper into position 2 (refer to the illustration below).
5. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn off.
6. Enter the DTMF code (up to 15 characters) using the keypad of the Touch-Tone telephone. The red LED will flash
each time a DTMF character is entered.
7. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn on.
8. Press the Program Enter button on the Loudmouth
9. Place the LM-DTMF program jumper back into position 1 (refer to the illustration below).
Programming the LM-DTMF over –the-air with a DTMF equipped radio
1. Remove the Loudmouth™ receiver front cover and apply power using the RPS-1A power supply. The AFB-1545
antenna should be connected to the Loudmouth
2. Be sure the LM-DTMF program jumper is in position 1 (refer to the illustration below).
3. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn off.
4. Using your DTMF equipped radio, transmit a signal to the Loudmouth
characters). The red LED will flash each time a DTMF character is received.
5. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn on.
Program Jumper in Position 2
™
receiver must first receive the programmed DTMF code before it can active the
™
frequency and tone.
™
receiver to leave field programming mode.
™
receiver.
™
receiver and send the DTMF code (up to 15
™
RJ-11 Programming Jack
Red LED Indicator Program Button * N/O Relay Contacts
* N/O Relay Contacts The normally-open relay contacts included on the LM-DTMF decoder board provide a momentary
1-second switch closure whenever the DTMF code is decoded.
Pin 1 +V BATT
Pin 2 Ground
Pin 3 Audio Input
Pin 4 Decode Output
Pin 5 Unused
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