SGC MAC-200 Operating Manual page 7

developed over the years with SGC's Smartuner line of antenna
couplers. However, the MAC-200 is an antenna TUNER intended
for installation near the transceiver rather than at the antenna feed
point..
The MAC-200, located as it is in the radio room at the point where
all antenna feed lines come together, provides tuning at the end of
the antenna feed line rather than at the optimum point, the antenna
feed point. SGC Smartuners provide for matching of an antenna to
the feed line, thereby minimizing SWR and losses on the line. The
MAC-200 allows control of multiple antennas from a single box
and tuning the antenna system in order to connect to the
transceiver, but it must match the impedance as reflected by the
transmission line to the device.
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