Appendix B: Functional Description Of Block Diagram; Wireless 6000 Base Station Block Diagram - HME Wireless 6000 Installation Instructions Manual

APPENDIX B: FUNCTIONAL DESCRIPTION OF BLOCK DIAGRAM
The base station is the main control and interface of the Wireless 6000. All audio to and from the
®
speaker post and COMMUNICATOR routes through the base station. The base station contains the
following circuit boards: audio board, transceiver board, optional switcher board and optional vehicle
detector board.
Audio Board
The audio board contains all of the microphone and speaker amplifiers, as well as the power
supplies and A and B channel decoders. The A and B decode signals are used by the audio board
to route the audio signals. The ceiling speaker is connected directly to the board.
Transceiver Board
The transceiver board contains the RF transmitter and receiver, which allow communication with the
Communicators.
Vehicle Detector Board (optional)
The vehicle detector board is used to generate a vehicle-presence output from an inductive loop.
The output of this board is connected to the switcher board, which activates the base station for
drive-thru operation.
Switcher Board (optional)
The outside speaker/microphone lines are routed to a switch matrix on this board. The microphone
input and speaker output (half-duplex mode) from the audio board are also routed to this matrix.
The board also contains the necessary connections and a switch for an emergency backup system.
It also provides the necessary connections for an external vehicle detector.
Figure B-1.
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