Specifications

SMARTUNER MANUAL 4
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
The coupler will cease to operate normally if input voltage drops below 10.5v DC. This
situation may occur if a marginal battery is used or if you are transmitting at high
power with an inadequate power supply or battery. Batteries must be fully charged for
proper operation. Large gauge wiring to the transmitter and coupler must be used to
avoid retuning.
If broadband operation is required during scanning operations, jumper JP-1 on the
printed circuit board inside the coupler may be set to the “YES” mode. This will bypass
tuning elements on receive. Jumper JP-1 is located near U1.
In some cases, it may be desirable to re-tune the coupler and bypass the memory
information. If you wish to bypass the recalled tuning solutions, place jumper JP-2, also
located near U1, to the “NO” position.
1.4 Coupler Network Configuration
The coupler network configuration is designed with 64 different input capacitor values,
32 output capacitor values, and 256 inductor values, thus providing about a half million
different pi or L configurations. The coupler requires an input of 3 to 200 watts to
operate. The unit operates on +12 VDC and can be optionally supplied to operate at +24
VDC. The +24 VDC option may be installed in the field. Please contact your dealer or
SGC and order Part Number 54-52.
1.5 OPERATION INDICATORS
Operational status of the coupler and the onboard computer’s tuning decisions is
displayed by five LEDs, which are located on the main printed circuit board (PCB).
These indicators are only visible when the cover of the coupler is removed. These five
LEDs are not designed to be interpreted by other than factory and trained service
personnel.
CAUTION: Dangerous high voltages exist inside the Smartuner
when it is operated with an HF transmitter. High RF voltages in excess
of 10kv may be expected in normal operation of this unit. In addition
to shock hazard, these RF voltages may produce burns that are very
painful if you come in contact with exposed components. Therefore,
DO NOT operate without the cover secured in place unless you are a
well experienced radio technician or engineer.
As a matter of good installation and engineering practice, exposed
metal antenna elements should be located in such a manner as to
prevent accidental contact with people (especially young children),
pets, and small animals.