Specifications

SMARTUNER MANUAL 3
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
© Nov2000 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
E-Mail: [e-mail] Web Site: www.sgcworld.com
1.3 Overall Description
The SMARTUNER is a general-purpose coupler that can operate with any type of radio
and almost any type of antenna configuration. The coupler network con-figuration is of
a pi or L type; sensors continually monitor the state of the tuning and relay this
information to the processor.
The initial (first time) tuning may take several milliseconds to a few seconds de-pending
on the complexity of the tuning process for a specific antenna configuration. After
tuning the first time for a specific frequency and antenna, this information is entered in
the non-volatile computer memory that will store up to 170 tuning solutions.
When the same conditions are encountered again, re-tuning is accomplished within 20
milliseconds by recalling the information from the non-volatile memory. Special
software has been designed by SGC to allow accurate and fine-tuning of the coupler.
For software description, refer to the MicroTune
™
section of the manual.
Red +12 VDC
Blk - Grou nd
Blk/ Wht - Remote
Tuned Indicator
Red/ Wht - SmartLock
control line
Wire antenna
SG-230 SMARTUNE
R
Lar
g
e Ground or counter
p
oise s
y
stem
9 feet
(
2.8 mtr
)
DIAGRAM OF SMARTUNER INSTALLATION
To Transmitter
PL-259
(
side view
)
If antenna or transmitter conditions have changed since the information was stored in
memory, the coupler retunes and a new tuning solution is achieved. This new
information is stored to memory for future reference. The Smartuner will always look
for the best possible tuning solution and will improve existing tuning solutions whenever
possible.
The SMARTUNER may be bypassed and your antenna used as a broadband receiving
antenna. To do this, turn off the power to the coupler for two seconds and then turn it
back on, or simply press the reset button on the SmartLock. In this situation, the coupler
is reset to stand-by waiting for the first RF power to be transmitted before providing a
tuning solution. In the stand-by mode, the antenna bypasses tuning elements and
connects the antenna directly to the receiver with no tuning elements engaged. This
allows for receiving signals throughout the HF range.