Tait TB9100, Инструкция по установке и эксплуатации

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68 Base Station Operation TB9100 Installation and Operation Manual
© Tait Electronics Limited May 2006
3. Press the speaker button a third time to turn the speaker off.
Gating and squelch mechanisms are carried out as normal on the voter
output.
When the receiver input is monitored, the speaker audio is ungated but the
base station still carries out gating and squelch mechanisms on the signal
input to the voter. The speaker produces audible speech on P25 signals
when the base station successfully detects frame synchronization.
Note
If the RF receiver is configured to receive analog signals only, the
speaker will only play P25 speech if the voter output is selected. If
the RF receiver is configured to receive
digital signals only, the
speaker will only play analog speech if the voter output is selected.
To maintain security, the speaker never decrypts encrypted calls. If a call is
encrypted, the speaker produces squalks and squeaks. However, if the base
station has an encryption license, the speaker remains silent.
Microphone Operation
The control panel microphone allows the maintainer to talk to the
dispatcher and to the other radio terminals in the network. This can be done
in digital mode or analog mode. This section describes how to set the speech
mode for the call. For detailed information about making a control panel
call, refer to
“Making Test Transmissions” on page 43 .
To set the mode for the control panel:
1. Press the left microphone channel button once to set the mode to
analog FM. The green microphone LED is lit.
2. Press the microphone channel button a second time to set the mode
to digital FM. The green microphone LED flashes.
When the control panel is set to digital mode, the microphone identity is
configured by the NAC (network access code) in the signaling profile. The
call destination is to all units in the channel group.
When the microphone is set to analog mode, the call properties are
configured by sub-audible signaling in the signaling profile. Control panel
calls can be made when the base station is in either Standby or Run mode.
Note
Making transmissions from the microphone overrides any other
calls on the channel. Before using the microphone to make a call,
make sure that the channel is clear, otherwise, any calls in progress
on the channel, including emergency calls, will be terminated.