Specifications

SMARTUNER MANUAL 47
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]
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NO In this position the coupler will retain the required tuning data and will
change nothing whether in receive or transmit.
If typical operation is out of band duplex, Yes would be most likely to give better
performance. If in band operation is typical and duplex or simplex is the predominant
mode of operation, then No is usually the better choice.
8.2.4 Jp2—Tune From Memory
(Factory Default Setting: Yes)
YES In this position the coupler will recall data previously saved and try this
data before attempting to re-tune. If the data is valid and the VSWR is less
than 2:1 the tune is completed. In this position the coupler will save any
new data in its memory for any frequency. A new frequency must first be
learned, while in this mode, before it can be recalled.
NO In this position, the coupler will not use previously saved tuning data.
Each time a different frequency is selected, the coupler will proceed
through a complete tuning sequence.
Clearly, the advantage of Yes is speed. The coupler will seem to be matched instantly
when in this position, if the frequency being used has previously been saved in
EEPROM. Disadvantages include a difference in frequency too small for the computer
to detect. This would result in recall of valid data that may not necessarily present the
best match.
We suggest starting with JP2 in the Yes position. If operation is as expected, don't
change it.
9.0 SMARTLOCK OPERATION
The SmartLock allows the operator to have additional control over the SMARTUNER. It
is not required for normal operation.
9.1 Tune, Tune Lock, and Reset
Tuned (green LED) Turns on when the coupler has successfully tuned.
Normal / Tune Lock Toggle switch that allows user to prevent coupler re-tuning
by switching to the Tune Lock position. When in the Tune
Lock position, the red LED blinks to notify the user that the
coupler is locked on the current setting.