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Summary of Contents for RDT RM96xx
- Page 1 RM96xx Radio Modem Series User Manual...
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Page 2: Table Of Contents
Softward Release Information ............18 RDT does not assume any responsibility for the use of the products described. No product patents are implied... -
Page 3: Modes Of Operation
Automatic Repeat Request (ARQ) Brief Description The RM96xx Series of Radio Modems are a range of UHF multi-channel transceivers, incorporating a GMSK baseband modem and RS232/RS485 serial data interfaces. As with all RDT Radio Modem products, the RM96xx provides fully transparent operation regardless of the serial data protocol. - Page 4 Additional Information Power Supply The RM96xx board requires a 12V d.c. power supply Yellow LEDs indicate minimum acceptable signal, which should be well filtered and regulated. On- green LEDs indicate excellent signal strengh. board voltage regulator circuits will maintain a...
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Page 5: Primary Modes
When the synthesiser has locked and the transmitter reached operating power the modem will set RTS output high. This signals the user that the RM96xx is now available to accept serial data. Once RTS is raised, the RM96xx will operate in accordance with Asynchronous mode with the exception that the transceiver will stay in transmit until the user lowers CTS. -
Page 6: Repeater Modes
Standard Repeater In the Standard Repeater mode all RM96xx units within the system must be set to the same address. The base unit is configured as a standard unit, the repeater is set to 'Standard Repeater' and the remote units must be set to 'Repeater Remote' (see page 14 for switch settings). - Page 7 Address 3 Serial Notes An RM96xx in Automatic Repeater Mode will Transmit on its own address and receive on an address 1 higher or 1 lower. i.e. Unit B (above) will transmit with address of ‘1’. Messages from other Automatic Serial Repeaters will be accepted if their address is ‘0’...
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Page 8: Serial Control Mode
DIL switches. In some applications the user equipment takes care of addressing in which case an RM96xx operating in one of the standard modes can be utilised to provide a straight forward transparent serial data link. - Page 9 Synchronous Mode with or without ARQ Set or Interrogate commands will only be accepted if the RM96xx has no data to transmit and no data to output on the serial port, otherwise they will be ignored and no response returned on the serial port. If there is no response to a command, programming has not been successful.
- Page 10 ... serial control mode continued Command Format Serial Control mode allows the user to set or enquire about the value of an Address or RF Channel number. The command format for each of the functions is as follows: Set Address Send Text String RM9600 Reply String Function...
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Page 11: User Controls
User Controls Factory Settings User Configuration The RM96xx is shipped from the factory pre-pro- Settings are altered by following 3 simple steps:- grammed to operate with the following settings:- Adjust Rotary switch (SW2) for desired Serial Port function (see table 1) - Page 12 RM96xx User Configurable Settings ROTARY SWITCH = 0 SWITCH SW1 3 RUN MODE RF POWER RF CHANNEL 50mW LOWEST FREQ 100mW 250mW etc. etc. etc. etc. etc. etc. HIGHEST FREQ 500mW ROTARY SWITCH = 1 SWITCH SW1 3 TEST TEST MODE...
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Page 13: Timing Diagrams
Timing Diagrams Transmitter Receiver Fig. 3 Asynchronous Mode Transmit/Receive Timing Diagram Transmitter Receiver Fig. 4 Asynchronous ARQ Mode Transmit/Receive Timing Diagram Transmitter Receiver Fig. 5 Synchronous Mode Transmit/Receive Timing Diagram Transmitter Receiver Fig. 6 Synchronous ARQ Mode Transmit/Receive Timing Diagram... -
Page 14: Specifications
..timing diagrams continued Transmitter Data Radio Header 1 = Transceiver lock time & Data Block Trans mitter pow er up = 10 mS max . 2 = Time var ies with quantity of data still to Tr ansmit. 3 = Transceiv er lock time TX to RX = 10 mS max . -
Page 15: Serial Port Connections
RS232/RS485 Serial Port Connections RS232 9-Way 'D' Description RS232/485 Pin 1 DCD Data Carrier Detect The RM96xx has two serial ports, a 9-Way 'D' Type Pin 2 RxD Receive Data connector (RS232) and a two part Phoenix Pin 3 TxD Transmit Data connector (RS485).