User Manual

Installation and Operator Handbook Operating Instructions
AMX-MA-00654 Issue 0.02 (USA)
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4.6.2 Making Calls
Calls may be sent from the DRB-25 using a microphone connected to the transceiver module front panel RJ45
audio connector. Calls will be broadcast with the transmit NAC and Talkgroup ID (digital mode) or transmit
CTCSS/CDCSS (analog mode) of the transceiver’s current channel, as defined by the channel table entry in
the Transceiver Module Programmer.
4.6.3 Changing Audio Volume
If a loudspeaker panel is fitted, audio volume is controlled by the volume knob on the panel. If an external
speaker is connected, audio volume may be controlled using a DTMF microphone connected to the
transceiver module front panel RJ45 audio connector. The DTMF key sequence *2*nn* will set audio
volume to level ‘n’ between 00 (off) and 09 (full volume).
Note : the DTMF key # will erase any preceding (incomplete) DTMF key sequence.
4.6.4 Changing Selected Channel:
The transceiver’s current channel may be changed using a DTMF microphone connected to the transceiver
module front panel RJ45 audio connector. The DTMF key sequence *1*nnn* will change the transceiver to
channel ‘nnn’. The selected channel will be displayed on the front panel of the transceiver module.
Note : the DTMF key # will erase any preceding (incomplete) DTMF key sequence.
4.6.5 Squelch Adjustment
The receiver squelch level may be set in analog mode using a DTMF microphone connected to the transceiver
module front panel RJ45 audio connector. The DTMF key sequence *3*nn* will change the squelch level as
follows:
• *3*00* sets carrier squelch.
• *3*nn* sets squelch level to ‘nn’ dB SINAD where ‘nn’ is between 06 and 20.
• Squelch hysteresis is 2dB.
4.7 REMOTE OPERATION
The DRB-25 may be controlled remotely using any industry standard tone remote control console over two or
four wire telephone lines using leased lines or dial up, provided the DRB-25 is fitted with the corresponding
two or four wire line interface option. One line is used for each transceiver. To configure the DRB-25 for
remote operation:
1. Connect the two or four wire line(s) to the RJ45 line socket on the interface module at the rear of the
DRB-25.
2. Configure the allocation of function tones (F1 up to F12) if required (this functionality is part of the
Transceiver Module Programmer software described in chapter 5).
Connect the tone remote console to the line and operate according to the console manufacturer’s instructions.