Page 8 FTDX1200 Operating Manual

INSTALLATION AND INTERCONNECTIONS
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ANTENNA CONSIDERATIONS
The FTDX1200 is designed to work with any antenna system providing a 50 Ohm resistive impedence at the desired operating frequency. While minor excursions from the 50-Ohm specification are of no consequences, is the Standing Wave Ratio (SWR) present at the Antenna jack is greater than 3:1, the transceiver's Automatic Antenna Tuner may not be able to reduce the impedance mismatch to an acceptablevalue.

Every effort should be made to ensure that the impedance of the antenna system be as close as possible to the specified 50-Ohm value. Note that the "G5RV" type antenna does not provide a 50-Ohm impedance on all HF Amateur bands. An external wide-range antenna coupler must be used with this antenna type.

Any attenna to be used with the FTDX1200 must be fed from the transceiver with 50 Ohm coaxial cable. Therefor, when using a "balanced" such as a dipole, remember that a balun or other matching/balancing device must be used to ensure proper antenna performance.

The same precautions apply to any additional (receive-only) antennas connected to the antanna jacks. If your receive-only antannas do not have impedance near 50 Ohms at the operating frequency, you may need to install an external antenna tuner to obtain optimim performance.

End of "Antenna Considerations"

ABOUT COAXIAL CABLE
Use high-quality 50-Ohm coaxial cable for the lead-in to your FTDX1200 transceiver. All efforts at providing efficient antenna system will be wasted if poor quality, lossy coaxial cable is used. This transceiver utilizes standard "M" ("PL-259") type connectors.

End of "About Coacial Cable"

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Page 8 FTDX1200 Operating Manual