Tait TB8100 Installation And Operation Manual

18 Circuit Description TB8100 Installation and Operation Manual
© Tait Electronics Limited June 2005
Control Circuitry
The RISC controls the operating functions of the reciter and provides the
interface to the outside world. Some of the functions it controls are:
■ Tx key and Rx gate
■ communications to the system interface board
■ digital input from the system interface board
■ communication with the other modules in the TB8100 BSS via the I
2
C
bus
■ communications with the Service Kit software.
Figure 2.2 Reciter high level block diagram
DSP
CODEC
CODEC
CODEC
40MHz
Clock
Receiver
Exciter
Synthesizer
Subsystem
Reference
Frequency
Subsystem
Digital
Receiver
Power
Supply
Power
Supply
RISC
DSP/RISC
CODECs
IF
12.8MHz
Ref.
RF I/P
28VDC I/P
28V
28V 5V
3.3V
8.5V
RF O/P +
PA Key
Audio
System
Control Bus
System I/O
Digital
Receiver
Audio &
RSSI
Control &
Communications
Control &
Communications
Modulation
& Frequency
Control
Control &
Communications
External
Reference
Frequency
(if used)
RF Board Digital Board
System
Interface
Board

Tait TB8100 Specifications

General

Brand	Tait
Model	TB8100
Category	Accessories
Language	English