ID-O-Matic II Manual
02/27/2010
Page 9 of 14
Three separate messages can be entered at setup time. They are used as follows:
•
ID Message: This is the “normal” ID message, sent when the timer expires.
•
Beacon message: This message is optional. If you wish to have your repeater or link transmit a
different ID message after a period of inactivity, you can use this message. The beacon message
will be sent only after the repeater has been idle for the length of time indicated by the Beacon
Time setting. If this message is not set, the regular ID message will be used for the beacon
message.
•
Alternate (ALT) Message: This message is used in place of the ID message if the ALT/TEST
input is held low when the timer expires. This can be useful to indicate some external condition.
For example, a simple circuit consisting of a series resistor and a 4.7V Zener diode can be used to
indicate if the main power source has failed and the repeater is running on backup power. The
input pin has an internal weak pull-up of approximately 47K Ohms, so a pull-down resistor is also
needed. Below is an example circuit; you may need to alter it to fit your particular setup.
