TB8100 Installation and Operation Manual Functional Description 41
© Tait Electronics Limited June 2005
4.1.3 Single and Dual 12V PA Base Station Systems
The TB8100 platform also supports the operation of one or two 12V PA
base stations in one subrack. Figure 4.3 below shows the main
communication paths in a dual 12V PA base station system. The 12V PA
base station system does not require a PMU, as the DC input is connected
directly to the 12V PA. An internal boost regulator board converts the 12V
nominal DC input to a 28VDC output to power the PA circuit boards. The
boost regulator board also provides a 12VDC output to power the reciter.
A single or dual base station control panel is fitted, according to the type of
system. However, both single and dual 12V PA base stations use the dual
base station subrack interconnect board. This board is mandatory for dual
Figure 4.3 Dual 12V PA base station system communication paths
Microphone
Power Saving Control
Power Saving Control
SIF = system interface board
Fan
Fan
I C
2
I C
2
I C
2
I C
2
I C
2
RS-232
RS-232
Mic
Mic
Speaker
Speaker
RS-232
12V PA 1
µP
Subrack
Interconnect
Board
12V PA 2
µP
Reciter 1
µP
SIF
Control Panel
PA
Fan
SIF
Reciter 2
µP
I C Current
Source
2
I C Current
Source
2
User
Controls
Speaker
Base Station
Selection