User's Manual

HDC1200 SIGNALING
Publication 14222-1150-2000, Rev. A 53
GENERAL INFORMATION
The radio supports HDC1200 signaling. This signaling is compatible with MDC1200 signaling. It supports
functions such as PTT ID signaling, emergency signaling, and signaling via selective call. These functions are
supported in both encode and decode modes.
TRANSMISSION (ENCODE)
PTT ID Transmission
Along with voice audio, the radio can transmit an HDC1200-encoded identification (ID) number on the selected
channel with each press of the radio’s PTT key. This is commonly referred to a “PTT ID.” Per radio
programming, the ID number can be sent when the PTT key is pressed (before voice audio is transmitted),
when the PTT key is released (after voice audio is transmitted), or both at press and release of the PTT key.
The radio can be programmed to either sound a tone when it is transmitting the encoded signal or sound beeps
after it has transmitted the encoded signal.
Private/Group/All Call Transmission (Selective Call via Contact List)
An HDC1200-
encoded signal can also be transmitted to a contact on
the radio’s Contact List as follows:
1. Use the Contact menu to access the Contact List and select the desired contact. The contact selection can be
a private call, a group call, or an all call. Alternately, if pre-programmed, press the Contact List shortcut
key to get to this list, and then make the desired selection.
2. After selecting the contact, depress the radio’s PTT key to transmit the pre-programmed PTT ID number
and voice audio to the selected contact, and speak into the microphone at a normal voice level. During the
transmission, the LED indicator glows red and the appropriate private call icon is displayed. The
icon is displayed for a private call. The icon is displayed for a group call. The icon is
displayed for an all call.