54 Reciter Circuit Description TB8100 Service Manual© Tait Electronics Limited September 20062.6 System Interface BoardsThe reciter can be fitted with an optional system interface board whichprovides the links between the reciter’s internal circuitry and externalequipment. This board is securely mounted to the reciter’s chassis and isconnected to the digital board with a flexible connector. The systeminterface board is fitted with industry-standard connectors and severalstandard types are available for different applications.The circuitry on the system interface board provides additional signalprocessing so that the outputs meet standard system requirements. It alsoenables the board to identify itself to the reciter control circuitry.The system interface board is removable, which makes it possible to changethe application of a reciter by removing one type of board and fittinganother. Only one system interface board can be fitted to a reciter at anyone time.The following section provides an overview of all the system interfacecircuitry. However, not all the circuitry described here will be fitted to anyparticular system interface board. The different types of board and theirmain features are listed in Table 2.1 on page 55. Refer also to Figure 2.12on page 56.
