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2)
Use the up and down arrows to find the item that shows either "EXTENDED AUTO ON" or
"EXTENDED AUTO OFF".
3)
Use the left or right arrows to select "EXTENDED AUTO ON".
With extended auto turned on, the 5500 can recover the optimal setting over a wider range of intensities.
When the keykode is no longer recognizable the 5500 may use one of two 'hunt' routines to search for
an illumination level which will produce readable bar-code.
The best 'hunt' routine is based on the biphase from the telecine to measure when a reasonable amount
of film has gone by with no keykode reads (typically 2 bar-codes worth). Provided that "TACH HUNT ON"
is selected in the Engineering SETUP menus, the 5500 will then adjust the intensity down to the next
major zone in search of readable bar-code. The 5500 will cycle through the entire intensity range within
approximately 6 to 8 feet of film and will continue to do so until bar-code is read.
When biphase is not available the next 'hunt' routine (edge hunt) will take over - provided the "EDGE
HUNT ON" item is selected in the Engineering Setup menus. This routine counts the changes in the
detectable image to 'guesstimate' when a reasonable amount of film has gone by with no keykode reads.
The 5500 will then adjust the intensity down to the next major zone in search of readable bar-code. The
biphase based 'tach hunt' is much more reliable than the 'edge hunt' routine.
Sometimes the 'hunt' routines can be activated inappropriately. The most obvious example is when the
film spools off the reels. The tach wheel on the telecine may keep spinning and fool the 5500 into hunting
for the correct intensity setting for the missing keykode.
Each 'hunt' routine can be disabled from the Engineering Setup menus while still leaving the main auto
routine enabled. When "KK MAN INTENS" is selected all auto and hunt systems are disabled. When
"KK AUTO INTENS" is selected the LED intensity can still be manually adjusted from the KK INTENS
menu, however the auto or hunt routines may change this value whenever they are triggered. This
feature can be used to manually adjust the intensity until a bar-code is read, whereupon the auto
routines (if "KK AUTO INTENS" is selected) will take over and find the optimal setting.
B_INTENS.DOC
5288 John Lucas Drive, Burlington, Ontario, Canada, L7L 5Z9
The 5500 measures the combination of the density of air and the
performance of each LED and sensor and sets the lower limit accordingly.
This occurs once after a factory reset and appears as a "AIR READY N<>Y ?"
prompt. If the right arrow is pressed, the 5500 will evaluate and remember
each lower limit. This will normally have been done at the factory and this
prompt will not be seen by the user.
------------------ NOTES ------------------
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Evertz Microsystems Ltd.
Tech Support: Phone 905-335-3700
Fax 905-335-3573
Internet: eng@evertz.com
94/8/25
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