TB8100 Service Manual Control Panel Circuit Description 271© Tait Electronics Limited September 200617 Control Panel Circuit DescriptionThe control panel is designed to be the link between the user and theTB8100 base station. The circuitry for the operation of the control panel islocated on a board mounted behind its front face. All communicationbetween the base station and the control panel is via the system control bus.Figure 17.1 on page 274 and Figure 17.2 on page 275 show theconfiguration of the main circuit blocks, and the main inputs and outputsfor power, audio and control signals.This chapter provides an overview of all the control panel circuitry1 .However, not all the circuitry described here will be fitted to any particularcontrol panel board. The different types of board and their main features arelisted in the following table.1. For a description of the controls located on the control panel, refer to“Operating Controls” in the Installation and Operation Manual.Control Panel BoardFeature StandardDual BaseStation Power Save Multi-reciterprogramming port ✓ ✓ ✓ ✓microphone socket ✓ ✓ ✓volume control knob ✓ ✓ ✓0.5W speaker ✓ ✓ ✓PTT key from microphone ✓ ✓ ✓LED indicators ✓ ✓ ✓ ✓speaker button ✓ ✓ ✓carrier button ✓ ✓ ✓microphone channel button ✓microphone button ✓base station select button ✓channel button ✓
