SGC Smartuner SG-211, Operating Manual

Page: 37 / 50

SG-211 User’s Manual
© 2004 SGC Inc. Page 35
4 Theory of Operation
The SG-211 tuner is built around the L network. An L
network as viewed from the transceiver may be
configured with the shunt reactance on the input or the
output as shown below:
4.1 No External Power Required
The SG-211 automatic antenna tuner is unique. It requires
no external source of power. This means that the unit can
be located remotely without the inconvenience of
additional wiring to provide power. For portable use, the
antenna tuner draws no power from station batteries.
Transmitter
Antenna
Transmitter Antenna