Tait TB9100, Installation And Operation Manual

Page: 15 / 144

TB9100 Installation and Operation Manual Description 15
© Tait Electronics Limited May 2006
The signal processing and the overall base station control is carried out by
the reciter, which 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 is responsible for the digital conversion of analog
information and for controlling the maintainer’s access via the control panel.
It performs the air interface signal processing for both analog FM and digital
P25 modes.
Figure 1.2 Base station high-level diagram
Reciter PMU PA
RF To
Antenna
RF From
Antenna External Reference
Frequency (if used)
AC I/P
DC I/P
28VDC
(high current)
System Control Bus
Microphone
I/P
TaitNet Digital
Network
Speaker
O/P
RF +
PA Key
28VDC (low current)
Analog Line
(4-wire E&M)
Digital
Line
RS-232 +
Digital I/O
Control
Panel
Figure 1.3 Reciter boards
RF I/P
RF O/P
Digital Line
RS-232 +
Digital I/O
Analog Line
RF
Board
Digital
Board
Network
Board
Control
Panel
Maintainer Access