If you just need to program some of the Radius series of radios like the GP300, GM300, GP350, Maxtrac, Radius Mobile, etc. The modified schematic can be found here. Some research has been done with the original RIB, and some modifications have been make to some of the values to make the circuit more compatible with RS232. You might want to try and change the value of R14 to 1.5k and R11 to 1K. It looks like one of the problems might be a lack of negative voltage swing on the Busy out and RX (data out) lines back to the computer. There have been reports of problems using the RIB on different computers. Make the board 75 x 103mm and you should be fine.Ī modification you may be interested in for the RIB. If you want to make your own PC Board, you can use this layout along with this placement diagram. This is done to prevent confusion between toner dots and decimals. You will find that 2k2 ohms refers to 2.2 kohms. See Sandy at for details (check out the Motorola link).īe aware that on the RIB schematic, you may not be familiar with some of the notation used for the resistors. We now have a source for some hybrid PC Boards.You can use the schematic and parts list below until your service manual The schematics and parts list for the RIB as well as some cable pinouts. This is the service manual for the RLN4008B and contains I strongly recommend that you order part number 6880309C92 from Motorola The RLN4008B Radio Interface Box (RIB) IF YOU NEED TO PROGRAMĪ MOTOROLA RADIO, YOU PROBABLY NEED THE RLN4008B RADIO INTERFACE BOX (RIB).
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