Kantronics KPC–3 Plus User Manual
Also see for KPC-3 Plus: User guideUser guideManual
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Contents
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15Consult the dealer or an experienced Radio/TV technician for help.The user is cautioned that any changes or modifications not expressly approved by the partyresponsible for compliance could void the user‘s authority to operate the equipment. The useris also cautioned that any peripheral device installed with this equipment must be connectedwith a high-quality shielded cable to insure compliance with FCC limits.Note 2: The shield of the cable, whether foil, braid, braid over foil, or double braid, must beproperly terminated (connected) 360 to the connector. This is usually accomplished by theuse of a metal or metalized plastic back shell, but may be implemented by direct contact,including soldering, with metal portion of connector. Experience has indicated that cableassemblies (with connectors) advertised as ―shielded‖ are not necessarily terminated properly,if terminated at all. Check cable construction to be sure.RFI SuppressionIn moving to the world of digital communications via computers, a new dimension of RFI may beencountered. In spite of the equipment manufacturers‘ diligence, each new piece of electronicequipment will react differently in each separate environment. Every amateur station will have itsown unique layout, equipment variation, and antenna installations. Experience has shown thatthese differences are related to the total RF environment, and may be causative factors in RFIinduced problems. The suggestions given here may assist in resolving RFI problems you mayencounter in your ―unique‖ station.Use shielded cable for all connections between equipment.Make all interconnecting cables as short as practical. A balance should be maintainedbetween cable length and equipment proximity. At times simply moving the video monitorone foot further from an interface or other device will solve a ―screen hash‖ problem.Antenna runs should be kept away from equipment control lines and/or interconnectingcables. If it is necessary for such lines to cross each other they should do so at 90-degreeangles.Ground leads should be as short as possible and go to a GOOD EARTH GROUND.Interconnecting cables appearing to act as radiators or antennas should be looped througha toroid. Be certain toroids, if used, are designed for the frequency in use. |
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