44
nector shown in above figure 6.1. A series resistor is not required with the LED
when the coupler is operated on 12 VDC, providing LED is rated at 25 milli-amp
minimum.
If you are planning to use the SG-230 with another manufacturer's equipment
and you are not clear on the function of the Remote Tuned Indicator line,
think of it this way: The remote tuned line goes to ground when the SG-230 is
tuned. If you provide this information to the manufacturer of the radio equip-
ment, they should be able to instruct you on how to connect the remote tuned
line to achieve a front panel display. (Naturally, SGC would like you to use our
SG-2000 series radio!)
7
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Weatherdeck mounting can be used. Years of experience have shown that
inside mounting or even splash-proof mounting is preferred, particularly in
cold, damp environments. In tropical use, shielding from direct sunlight is
desirable.
The base of the antenna should be connected to the high voltage feed-through
insulator on the housing. (Note: this insulator is not designed to support
heavy mechanical loads. If such loading is encountered, the use of a strain
insulator is desirable.)
The ground system should be connected to the 1/4 inch stainless steel stud pro-
truding from the bottom of the housing. Connection to the ground system is of
extreme importance for a successful installation. Ground runs of over a few
inches should be made from 4 inch wide copper strap or larger. The actual
ground system should be as good as possible, as the ground is an integral part
of the antenna system. See section 5.2.2 on grounding. However, couplers in
general require the antenna parameters to be within the range of the tuning
parameters or the coupler will not find a satisfactory match. It should always
be remembered that the computer in the SG-230 is unable to second-guess the
installer.
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USA
P.O. Box 3526, 98009 Fax: 425-746-6384 Tel: 425- 746-6310 or 1-800-259 7331
E-mail: [email protected] Web site: http://www.sgcworld.com
© 1998 SGC Inc
SG-230 Manual
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