46
first. Allow the SG-230 to "learn" your antenna's requirements by proceeding
from frequency to frequency and allowing the normal tune-up to occur. As
the SG-230 computer memorizes more and more frequencies, you should then
be able to return to a previously tuned frequency and find that the coupler
immediately responds 'ALL TUNED', even before the first word is completed.
T h e m e m o r y s y s t e m i s c a p a b l e o f s t o r i n g h u n d r e d s o f i n d i v i d u a l
frequency/relay combinations, mostly in the lower operating frequencies.
This provides better memory resolution at the lower frequencies where anten-
na systems are inherently narrow band. Usually, only one or two memory
positions are needed to provide satisfactory coverage at higher frequency bands.
7
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If you suspect that there is a problem with your transmitting equipment, here
is a simple test that you can perform to find out if your station equipment is
operating properly. All that is required is some hook up wire, a PL-259 con-
nector, 2 alligator clips, a lamp socket, 100 watt lamp or a minimum 200 watts
for 500 watt system (two may be paralleled if necessary), and adapters as
shown in the diagram. In a real emergency, you can simplify this arrange-
ment to suit the materials that you have on hand.
1 - The light bulb test is used to verify basic operation of the transmitter, and
antenna coupler. The lamp will present a load to the transmitter, and antenna
coupler that is similar to an antenna. This test will provide a visual indication
of the power output from the transmitter, and verify operation of the
antenna coupler.
2 - The transmitter should be tested first. Note that the lamp may be dim on
some frequencies. This is because the lamp is not an ideal load for the trans-
mitter, and the SWR protection circuitry in the transmitter will automatically
reduce transmitter power. If the lamp does not light on any frequency, there
is high probability that the transmitter is in need of service, and there is no
need to proceed to the coupler test.
3 - If the transmitter passes the test, proceed to the 'coupler test procedure'.
Make sure that the antenna and ground are first disconnected from the cou-
pler. Note that you should be able to hear the relays clicking in the coupler as
the tuning cycle begins. This should stop within a few seconds, and the lamp
should light brightly. If you are using the tuned indicator option, it should
illuminate when the coupler is tuned.
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