M850-00
Talk Through Repeater
G3.1
Copyright TEL 31/09/98
3 Talk Through Repeater
In this configuration the receiver directly keys the transmitter when the signal is
received. The demodulated audio is fed via 600 ohm lines to the transmitter to modu-
late the carrier. The receiver and transmitter operate simultaneously and must therefore
be on different frequencies. The minimum frequency separation depends on the
duplexer used.
Figure 3.1 Talk Through Repeater
Duplexer
Receiver Transmitter
Monitor
Speaker
Local
Microphone
13.8V
Supply
+
-
Tx Key Out
Line Out Line In
Tx Key In
Antenna
Typical line level -15dBm
Monitor
Out
Mic.
In
Transmit PortReceive Port
RF In
'N' Socket
RF Out
'N' Socket