Tait TB9100, Installation And Operation Manual

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TB9100 Installation and Operation Manual Description 23
© Tait Electronics Limited May 2006
stream is sent to all RF interfaces. Like the simplex voter, there are duplex
voters at each channel group member.
Both simplex and duplex channel groups can repeat the RF, or not.
For full details about the audio paths and signal processing, refer to “Signal
Paths” on page 97 .
1.5 Base Station Options
The modular design of the TB9100 base station means that it is available in
many variations. A range of features that can be enabled in software adds
another level of configurability. Here are some of the different kinds of
TB9100 base station that result from different module combinations.
Base Station/Repeater
The standard TB9100 combination of modules is suitable for use as a line-
connected base station and as a repeater. This is the typical base station
configuration described in
“Theory of Operation” on page 14 .
Base Station/Repeater for External Power Supply
The TB9100 base station can be provided without a PMU for those who
prefer to use an external third party power supply. This option must use a
variant of the PA that works off a 12 V power supply and includes a boost
regulator board that takes the 12 V input and outputs a regulated 24V supply
to the rest of the PA. Customers must provide their own power supply.
Without a PMU, the base station cannot carry out its power management
functions.
Receive-only Base Station
The TB9100 base station can be provided as a receive-only variant in
systems that need sites to enhance the receive coverage. This consists of a
single reciter in a subrack, with or without power management. The exciter
is present but not licensed to transmit.
Analog Gateway
A reciter in a subrack can provide a gateway between an analog dispatch
system and a TaitNet P25 network of TB9100 base stations. Its analog line
connects to the dispatch system and its digital line connects to the TaitNet
P25 network. This is particularly valuable in networks that use encryption;
it brings the encryption and decryption point close to the dispatch