User manual

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3.3 Antennas and the MAC-200
The MAC-200 can accommodate a wide variety of antennas
providing a convenient way to switch between them and to tune
them, all in the same box.
3.3.1 Optimum Coupling
The MAC-200 incorporates a coupler internally to provide for
tuning on a variety of antennas under direct control of the user.
Mailing: PO Box 3526, Bellevue, WA. 98009
Shipping: 13737 SE 26
th
St. Bellevue, WA. 98005
Toll Free: 800-259-7331 * Phone: [phone] * Fax: [phone]
www.sgcworld.com * Email: [e-mail]
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This is a compromise location. The optimum location is the
antenna feed point where the impedance match keeps SWR on the
feed line to an absolute minimum.
3.3.2 Connecting Multiple Antennas
The MAC-200 is provided with 3 SO-239 connectors, one RF-
Hot/RF-GND pair, and one balanced feed connection. The SO-239
connectors are intended to connect to a normal Coaxial feedline.
Any antenna that is properly setup for Coax feed can be connected
to one of these connectors..
One common benefit of having a
switch able antenna controller is
the ability to leave a dummy load
connected so that you can switch to
it conveniently at need.
The RF Hot/RF GND connections
feed a long or random wire
antenna. They can feed any unbalanced antenna with RF Hot
connected to the radiator and RF GND to the RF Grounding
system.