User's Manual

ii Appendix 1: 12V PA TB8100 Installation and Operation Manual

Overview of Inputs and Outputs

This section identifies the main input and output connections for the

TB8100 BSS with 12V PA. Figure 1.2 below identifies the connections at

the front of the base station, and Figure 1.3 on page iii identifies those at the

rear. Refer to the “Connection” chapter for more details.

Important The system control bus terminating circuitry board must be

connected to the system control bus at all times. If the

board is disconnected, the state of much of the bus will be

undefined. This may cause corrupted data to be present on

the bus when the reciter reads the states of the switches on

the control panel. This in turn may result in random actu-

ations of microphone PTT, carrier, or speaker key, causing

the BSS to transmit or the speaker to be actuated incor-

rectly.

Figure 1.2 5W or 50W base station inputs and outputs - front view

RF input from reciter

terminating circuitry for system control bus

12VDC low current output for reciter

system control bus

RF output to PA

DC output (for optional reciter fan only)

12VDC low current input from PA

bdec

gfgh

reciter