Kessler AT-AUTO Operating Manual page 116

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1. Configuration/Data EEPROM write - Bug forced configuration and data settings to be
continuously written to EEPROM at a 1 Hz rate. Data should only have been written
to EEPROM if the data had changed. This was a hidden bug (now fixed) and was not
apparent to user.
2. Non-Initialized Fine Tuning - Bug manifested whenever "fine tune" commanded with-
out prior automatic tuning in the band of operation. Under these conditions, the
AT-AUTO
would motor the inductor to the maximum inductance and stop.
(tm)
3. Runaway Inductor - Occasionally during automatic tuning, the Inductor would motor
to maximum L and stop.
4. Runaway Capacitor - Occasionally during automatic tuning the Capacitor would re-
peatedly turn to position 397, then continue to approximately 004, and repeat sequence
indefinitely.
5. LCD Blanking - LCD would momentarily blank during auto-tune initiation.
6. Uncommanded/Unintentional retuning while in SSB mode - During SWR/Power sam-
pling AT-AUTO
(tm)
causing AT-AUTO
7. Failure to recognize excessive SWR - Under some circumstances with very excessive
SWR, AT-AUTO
(tm)
despite the very obvious (via the analog meter) antenna mismatch.
8. Frequency Error - Under conditions of very high SWR, AT-AUTO
sionally be unable to discern the operating frequency from the RF sample. Firmware
and hardware changes have considerably improved this problem. Problems might still
occur albeit rarely.
9. Autotuning Past Low SWR Points - During automatic tuning, the positioning of L or C
was too coarse causing the AT-AUTO
the AT-AUTO
(tm)
matching attempts (manual or automatic) would find suitable matches. Addressed in
revised tuning algorithms.
www.KesslerEngineeringLLC.com
would detect reflected power prior to detection of forward power,
to interpret this as excessive SWR and initiate retuning.
(tm)
would report "Good Match" and fail to initiate automatic tuning
(tm)
would then be unable to find a successful match although subsequent
to step past good match points. Occasionally
108
would occa-
(tm)

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