
S
SE
ET
TU
UP
P F
FO
OR
R E
EL
LE
EC
CT
TR
RIIC
CA
AL
L C
CH
HE
EC
CK
K O
OU
UT
T::
7
7..5
5
E
EL
LE
EC
CT
TR
RIIC
CA
AL
L C
CH
HE
EC
CK
KO
OU
UT
T
After the SG-230 antenna coupler has been installed, the SSB transmitter
should be adjusted to the highest frequency desired, and a directional watt
meter (i.e. Bird Model 43) should be inserted into the transmission line. The
transmitter should then be powered. The SG-230 will begin to tune when RF
power is applied, and you will hear a "clattering" of PC mounted relays. If the
antenna length and ground parameters are within range, the relay noises will
stop when just a few words are spoken, and the reflected power on the watt
meter would indicate a value of better than 2:1 VSWR. The "TUNED" LED, which
is mounted on the PC board will light, and if there is a remote "TUNED" indica-
tor, it will also light.
Next the SSB transmitter should be adjusted to the lowest desired frequency,
and the test as outlined above should be repeated. The SG-230 should immedi-
ately sense the mismatch, and switch to the tune mode to retune the antenna
system. Since the algorithm must search through more possible values of L
and C to find an appropriate combination at the lower frequencies, the tune
cycle may take longer. A few spoken words should achieve an "all tuned" indi-
cation. The SG-230 installation and tune-up is considered complete if the above
tests have been successfully performed.
The SG-230 will probably not be supplied from SGC with memory data appropri-
ate to your installation, and the memory feature may not seem impressive at
45
© 1998 SGC Inc
SG-230 Manual
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
12 volt power source
SGÐ2000 HF radio
(View: Back panel of unit)
Watt meter
SGÐ231
Antenna
Counterpoise
Terminal block
for DC power
cable
Smartlock
SG-2000 -->SG-231
Black (of coupler cable) = ground
Red (of coupler cable) = +12 VDC
Green = tuned indication
(Optional)
SG-230
SG-2000 --> SG-230
White with Black
- Pin 1
- Pin 2
- Pin 3