Tait TB9100 - Page 22

22 Description TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
The reciter receives RF signals from its RF input and sends RF from its RF
output to the PA, along with a PA key signal. The reciter also receives signals
from and sends signals to the analog line, the Ethernet interface, and the
control panel (see Figure 1.2).
A system control bus interconnects the modules and carries alarm and
control signaling between the reciter and the other modules.
The control panel speaker and microphone enable the base station
maintainer to communicate with the dispatcher or with subscriber unit
radios. The Ethernet interface carries voice over IP as well as
communications with the CSS.
The reciter carries out signal processing and has overall control of the base
station. It comprises an RF, a digital, and a network board, as shown in
Figure 1.3.
The RF board contains the receiver and exciter circuitry.
The digital board converts information between analog and digital and
controls the maintainer’s access via the control panel. It also performs the air
interface signal processing for both analog FM and digital P25 modes.
The network board acts as the link between the digital circuitry and the Tait
P25 Network, and gives the base station an identity as a network element.
It also provides the physical connections for the Ethernet, analog and
RS-232 serial interfaces.
For more detailed information, see “Technical Description” on page 117.
Figure 1.3 Reciter boards
RF I/P
RF O/P
Ethernet
Interface
RS-232 +
Digital I/O
Analog Line
RF
Board
Digital
Board
Network
Board
Control
Panel
Maintainer Access