SGC SG-2020 TEST DOCUMENT, Инструкция по установке и эксплуатации

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© 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
2.0 INTRODUCTION
Thank you for choosing the SGC Model SG-2020 transceiver. We
know that you have many options when choosing your communica-
tions equipment, and we are glad that your choice was SGC - an
American designed and manufactured product. SGC has been man-
ufacturing HF transceivers and equipment form 1971. Our philoso-
phy is to bring unique design innovations to the industry; products
that give superior performance and at very affordable prices.
The SG-2020 is by no means just another radio amateur product. It
is a professional, commercial grade transceiver, designed for a
whole panorama of HF users - amateurs, professionals and others.
The SG-2020 is the first in a series of new generation SGC products
based on the single I.F. frequency.
SGC introduced the first HF SSB which was mass produced for the
marine industry. This product included new features, such as wide-
band technology, all solid state and single conversion. This concept
led to the cutting edge technology behind the SG-2020 transceiver
with its intercept point at +18 dbm. Strong front end, single conver-
sion, structured around an I.F. frequency of 60 MHz, provides for a
superior and outstanding receiver with an IF rejection of 90db.
Spurious frequencies typically generated by conventional multiple
conversion designs are virtually eliminated.
With a custom high performance SGC mixer, we keep the design
simple and of superior performance. We have eliminated interfering
circuitry found in other transceivers. An additional design goal was
to have a low stand-by current, below 400 mA, which would allow
this unique product to be used in many applications when others
could not.
The SG-2020 incorporates a very basic noise blanker circuit which
operates without compromising receiver performance and without