Sony SS-HQ1 Application Notes page 119

AE Mode
AE mode can be activated by setting AEME (CAT CAT14_Byte1_bit0) to 0[h]. This mode offers AE operation
through AGC and electronic iris control. AE here essentially controls exposure by means of the electronic iris
with AGC at the minimum required gain. If there is insufficient exposure even at the maximum exposure time,
AGC controls AE with the shutter speed still set for longest exposure time. If exposure is excessive, first the
AGC gain is lowered. If there is too much exposure even at minimum gain, the electronic iris is operated.
AE mode has the following related parameters.
Parameter
BLCOFF(CAT14_Byte1_bit2)
AEREF(CAT14_Byte1_bit3)
AGCMAX(CAT14_Byte1_bit4)
AESPEED(CAT14_Byte12_bit0-7)
AGCMIN(CAT19_Byte1_bit0-7)
* For information on AEUSR, see "Detailed Description (Relationship of Modes and Parameters)."
Table 10.6-2 AE Mode Parameters
Description
Deactivates backlight compensation.
Enables switching
convergence level. At 1[h], the setting value of
AEUSR (CAT14_Byte13_bit0 to 7) is applied.
Enables switching two types of AGC maximum
gain.
Enables adjustment of the AE response speed.
The smaller the value, the faster the response;
the larger the value, the slower the response.
Enables the AGC minimum gain to be set. This
refers to the AGC gain when electronic iris control
and AGC gain control are in transition.
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- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
and setting the AE
Settings range
1[h]: No backlight
compensation.
0[h]:100[IRE]
1[h]: AEUSR setting
0[h]:AGCMAXL
1[h]:AGCMAXH
0[h] to FF[h]
0[h] to FF[h]