SGC SG-2020 TEST DOCUMENT, Installation And Operation Manual

Page: 31 / 95

27
© 1998 SGC Inc
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: 425-746-6384 or 746-7173 Tel: 425- 746-6310 or 1-800-259 7331
E-mail: sgc@sgcworld.com Web site: http://www.sgcworld.com
13.0 REAR PANEL CONNECTORS
(see figure 3 below)
13.1 ANTENNA (rear panel)
The antenna is connected to the ANTENNA connector. An SO-
239 connector is on the transceiver and is intended to be mated
with a standard PL-259 coaxial plug connector. The transmitter
expects a 50 ohm matched load at the operating frequency. If the
load is mismatched, the SWR protection will reduce the output
power with minor mismatches or shut the transmitter down with
more severe mismatches.
13.2 13.6 VDC - + (DC power connection, rear panel)
The power connector uses two contacts. The left contact (facing
the rear of the radio) provides the negative connection to the power
s u p p l y, and the center contact is the POSITIVE connection. The
unit requires 9 to 18 VDC at a key down current of 4 amperes with
a nominal voltage of 13.6 VDC.
13.3 EXTERNAL SPEAKER (rear panel)
The earphone connector is a 3.5 mm stereo jack. Walkman type
stereo headphones can be connected directly to the radio, or an
external speaker may be connected via this jack. When this con-
nection is used, the internal speaker is automatically disconnected.
FIGURE 3.