Specifications

If broadband operation is required during scanning operations, jumper JP-2
on the printed circuit board inside the coupler may be set to the ÒYESÓ mode.
This will bypass tuning elements on Receive. Jumper JP-2 is located adjacent to
the shield along the edge of the printed circuit board.
In some cases, it may be desirable to re-tune the coupler and bypass the memo-
ry information. If you wish to bypass the recalled tuning solutions, place
jumper JP-1, also located near U2, to the ÒNOÓ position.
Note: The SG-235 can be forced to retune in every new frequency, even if JP-1
is set to ÒYes,Ó by the following operations of the Smartlock:
1. Engage ÒTune lock.Ó
2. Press Reset once.
3. Disengage ÒTune lock.Ó
(See Section 9.2.)
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The coupler network configuration is designed with 64 different input capaci-
tor values, 32 output capacitor values, and 256 inductor values, thus providing
about a half million different ¹ or L configurations. The coupler requires an
input of 5 to 500 watts to operate.
11..55 OOppeerraattiioonn IInnddiiccaattoorrss
Operational status of the coupler and the onboard computerÕs tuning decisions
is displayed by five LEDs, which are located on the microcontroller unit (MCU)
printed circuit board (PCB). These indicators are visible only 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.
11
© 1998 SGC Inc
SG-235 Manual
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA 98005 USA
P.O. Box 3526, 98009 Fax: [phone] Tel: [phone] or 1-800-259 7331
E-mail: [e-mail] Web site: http://www.sgcworld.com