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- Page 1 USB Radio Interface Model MFJ-1204 INSTRUCTION MANUAL CAUTION: Read All Instructions Before Operating Equipment MFJ ENTERPRISES, INC. 300 Industrial Park Road Starkville, MS 39759 USA Tel: 662-323-5869 Fax: 662-323-6551 COPYRIGHT 2016 MF J ENT ERPRISES, INC. VERSION 1A...
- Page 2 Overview: You'll begin setup by looking up the jumper settings for your radio (in the manual, on line, or with radio cable instructions). Then, you'll remove the MFJ-1204 cover and install the jumpers as illustrated (it only takes a minute). Note that you MUST install the jumpers first, before connecting the interface to your computer and radio.
- Page 3 Setting Jumpers: Setting jumpers is a "one-time" procedure that interconnects your particular radio to the MFJ-1204. If possible, use the jumper wires provided (#24 solid or solder- tinned wire works best). Avoid larger wires that could damage the pin cups.
- Page 4 Connecting to Your Computer Important Note: Do not connect the MFJ-1204 to your computer until the prescribed set of jumper wires have been installed, the computer is turned on, and its operating system has fully booted up. Also, close any applications that are open and running before plugging in the interface.
- Page 5 Transmit Audio Level: Make sure your transceiver is operating into a low-SWR antenna or dummy load before proceeding. Most communication programs offer a "tune" function to provide a reference tone for setting transmit levels (check the program's documentation for tune-up specifics). When setting up, start with the Transmit control at minimum and bring it up slowly to avoid overdriving.
- Page 6 ICOM: 8-Pin RD Mic RJ-45 Mic 6-Pin Din Port SPKR SPKR SPKR Icom 728, 728, 735,738 Icom 706*, 746*, 7000* Icom 706 7100, 7400 746PRO, 751, 756Pro *(set menu 29 for 1200 baud) 761, 765, 775, 781 ICOM, KENWOOD, TENTEC: 13 Pin DIN 5-Pin DIN 13-Pin DIN...
- Page 7 [ ] Communication Program won't Load up or run properly: Confirm that the download program is compatible with your current operating system. If you are unable to resolve the problem, check the MFJ and SignaLink sites for special settings or conditions that may apply to your particular radio. Also, contact MFJ Technical Support at 662-323-0549 for assistance.
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