Motorola P200 free download

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CpE/EE 181 Fall 2001 Service Manual Format Repeater Controller Team Number: 13 Anthony Rossetti Faculty Advisor: Dr. Roy S. Nutter Monitor: Robert McConnell Sponsor: CSEE Department December 12,2001 Table Of Contents Description Overview Simple Overview Controller Connection Specifications 3 4,5,6 6 PAGE # Detail Descriptions Carrier Operated Switch Push-to-Talk Switch Audio Input Receiver Audio Telephone Audio Morse Code Generation Circuit DTMF Generator Audio Board Layout Audio Output Transmitter Audio Telephone Audio DTMF Decoder Ring Detection Circuit DC-DC Power WatchDog Timer Cinch Plugs Circuit Diagram Front View Of Controller Case Front View Of Audio Amplifier Circuit Diagram 7 8 9 9 9 10 11 12 12 12 13 15 16 17 18 19 20 21 2 Simple Overview The repeater controller constructed by Group #13 is a complete control system for any two-way radio. Acting as a controller between a transmitter and receiver, it also carries on an additional role of being a controller between a radio system and a telephone line. The controller also brings the user specific features that are available in some commercial controllers. This Repeater Controller does not require any unnecessary connections. Once this controller installed, no user servicing should be required. Two cables found in the rear of the controller, plug into a receiver and a transmitter. The plugs are each of different styles to prevent accidental connections. Each plug contains two grounds, a status line, and an audio line. The connectors currently on the controller are Cinch type, and may be easily changed to interface with other devices. Additional connections required are the power connections. Banana Plugs are currently employed to interface the unit to a DC power supply. The power lines along with the two cinch connectors are all the connections required for the controller to control the basic function of the repeater according to FCC Rules Part 97. For a basic hookup, see Figure 1. If the user wishes to use the telephone capability of the controller, the must only connect a U.S. telephone line to the system. The use of a specially modified telephone is used for the autopatch feature to function. Several types of telephones may be modified to function with this system. The modified telephone is one such that a 12-volt signal will simulate the lifting of the handset from the base. Modifications of a telephone is discussed later in the manual. A telephone line should be plugged into the controller as seen in Figure 2. The Handset from the telephone should be plugged into the other outlet on the controller box to establish an audio link between the telephone and controller. Another device for correct operation should be the RCA plug, which plugs into a modified telephone. 3 Figure 1. Diagram of Controller Connection DUPLEXER SIGNAL SIGNAL Receiver AUDIO CONTROLLER Receiver Control Power Supply Transmitter AUDIO Transmitter Control Telephone Line Figure 2. Telephone Connection Tel