Specifications

SMARTUNER MANUAL 46
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© Nov2000 SGC, Inc. P.O. Box 3526, 98009 Fax: [phone] Tel: [phone]
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5. At this point the tune indicators are engaged. The current relay data is saved if
JP2 is set to tune from memory; if JP1 is set to the tune elements out during
receive position, the program waits until forward power is no longer present,
then removes all tuning elements. The frequency is saved for future frequency
comparison, and the computer reverts to the Stop mode.
8.2.2 Antenna Too Long
C
L1
Antenna
out
50 ohms
Once the coupler has verified RF power, the tuning sequence proceeds as follows:
1. Output capacitance is added until the phases switches to capacitive.
2. At this point, series inductance is added until the antenna is no longer
capacitive.
3. Fine tuning is performed by trying a small amount of input capacitance (this
may or may not be required).
4. At this point, the program executes the same as step 5 (above).
The preceding gives a simplified program flow on only two possible antenna
conditions. Much more complex tuning is normally the case. Further detailed
description, however, is beyond the scope of this manual.
8.2.3 JP1—Tuning Elements Out During Receive
(Factory Default Setting: No)
YES In this position the software will retain data required in transmit to match
the coupler while removing all tuning elements when no forward power
is detected.