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Setting the automatic
exposure control
A-61096 June 1999
Automatic Exposure Control (AEC) provides optimal film quality by
helping to ensure that filmed documents are exposed at the proper
level.
Before filming documents, determine whether the AEC should be
turned on or off.
When AEC is turned on, it automatically adjusts for variations in
contrast, color, etc. Typically, AEC is turned on for average or normal
documents.
When AEC is turned off, it is fixed at a particular level for documents
which have large areas of dense shading, etc.). Typically AEC is
turned off for filming special documents such as transparencies, onion
skin documents or highly reflective documents.
NOTE: It is assumed that an Exposure Step Test has been
performed to determine the proper illumination level. Refer to
Chapter 2 , Getting Started for more information.
To verify the mode selected specifies that AEC is on:
•
Enter function code F24 (AEC On/Off).
The display shows: Automatic Exposure Control OFF (or ON)
−
If the AEC is OFF, enter 1 to turn it on.
−
If the AEC is ON, press the C key.
•
Enter function code F25 (AEC Auto Adjust) to adjust the base
illumination level.
−
Use the arrow keys to lighten or darken the base illumination
level (where 0 is the lightest and 9 is the darkest).
−
Press Enter when the level has been adjusted correctly.
To verify the mode selected specifies that AEC is off:
•
Enter function code F24 (AEC On/Off).
The display shows: Automatic Exposure Control OFF (or ON)
−
If the AEC is ON, enter 0 to turn it off.
−
If the AEC is OFF, press the C key.
•
Enter function code F26 (AEC Fixed Adjust) to adjust the fixed
illumination level.
−
Use the arrow keys to lighten or darken the fixed illumination
level (where 0 is the lightest and 9 is the darkest).
−
Press Enter when the level has been adjusted correctly.
3-3
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