30 Description TP9100 Service Manual© Tait Electronics Limited May 20052.4 Hardware and Software ArchitectureOverview This section describes the hardware and software modules of the radio andtheir interaction in the functioning of the radio.2.4.1 Hardware ArchitectureThe electrical hardware of the radio is implemented on the main board andthe front-panel interface board.For a detailed description and block diagrams of individual circuits, refer to“Circuit Descriptions” on page 49.Main Board The main board inside the radio body includes the following circuitry:■ transmitter■ receiver■ frequency synthesizer■ digital board with a RISC processor and custom logic (implemented onan FPGA), memory, and a DSP■ CODEC and audio■ interface■ power supplyFor a basic block diagram of the hardware architecture, refer to Figure 2.4on page 31.For a more detailed block diagram of the transceiver, refer to Figure 2.6 onpage 35 (analog mode) and Figure 2.7 on page 36 (digital mode).Front-PanelInterface Board The front-panel interface board includes the circuitry needed for thecontrols and indicators on the front panel and the man-down function.For a block diagram of the front-panel interface board, refer to Figure 3.9on page 73.