Specifications

SG-231 MANUAL
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
© 11/00 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
E-Mail: [e-mail] Website: www.sgcworld.com
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million different pi or L configurations. The coupler requires an input of 5 to 100 watts
to operate. The unit operates on +12 VDC.
1.5 Operation Indicators
Operational status of the coupler and the onboard computer’s tuning decisions is
displayed by five LED's, which are located on the main printed circuit board (PCB).
These indicators are only visible when the cover of the coupler is removed. These five
LED's are not designed to be interpreted by other than factory and trained service
personnel.
CAUTION:
Dangerous high voltages exist inside the Smartuner when it is operated
with an HF transmitter. High RF voltages in excess of 10 kv may be
expected in normal operation of this unit. In addition to shock hazard,
these RF voltages may produce burns that are very painful if you come
in contact with exposed components. Therefore, DO NOT operate
without the cover secured in place unless you are a well experienced
radio technician or engineer.
As a matter of good installation and engineering practice, exposed metal
antenna elements should be located in such a manner as to prevent
accidental contact with people (especially young children), pets, and
small animals.
1.6 Mechanical Design
The SG-231 is supplied in a weatherproof case with mounting holes. RF and DC power
is supplied to the unit through the separate cables. One cable is a 10 foot 50 ohm coax
for RF. The other is a 10 foot 8 conductor cable with wires for ground, power, optional
SmartLock controls, and optional LED indicator.
The SG-231 antenna coupler’s weatherproof case is designed to withstand the
environmental conditions encountered aboard ship when mounted on the
weatherdecks. The internal construction is designed to withstand the shock and
vibration of marine service. Corrosion-resistant hardware and passive alloys are
employed throughout. We do not recommend opening the Smartuner case unless it is
necessary. For 99% of installations, the factory settings for jumpers will be correct. The
coupler must be installed in an area not directly exposed to the sunshine or rain.
Should you have occasion to open the case, it must be re-sealed under low humidity
(below 35%) and care used to ensure the gasket that seals the unit is placed properly
to maintain watertight integrity of the unit.
Although the Smartuner is built very solidly, it is good installation practice to provide
additional protection from the elements. SGC makes the following recommendations: