75 / 80Copyright © 2014 TOSHIBA TELI CORPORATION, All rights reserved. http://www.toshiba-teli.co.jp/index.htmD4235067DALCControlThis section describes ALCControl category for the BG series.This camera series provides some registers to adjust the various parameter of ALC operation. When thecamera operates at ALC, AE operation is prior to AGC operation.outputluminanceExposureTimeMinExposureTimeMaxGainMinGainMaxReferenceLuminanceToleranceThrottleAEAE + AGCALCLatestInformation EventALCConverged EventtFig.5-18 ALC operation● RegistersRegister Visibility Access DescriptionALCPhotometricAreaSize Expert R/W Selects a photometric area size which is used to measure luminance.ALCReferenceLuminance Expert R/W Sets a value of the reference luminance when any ALC feature is running.ALCExposureValue Expert R/W Sets an EV level when any ALC feature is running.ALCTolerance Expert R/W Sets a tolerance range for the reference luminance when any ALC feature is running.ALCThrottle Expert R/W Sets a value of feedback fraction when any ALC feature runs.ALCLock Expert R/W Sets the lock of ALC operation.ALCExposureTimeMin Expert R/W Sets a minimum value of the exposure time when ALC(AE) feature is running.ALCExposureTimeMax Expert R/W Sets a maximum value of the exposure time when ALC(AE) feature is running.ALCGainMin Expert R/W Sets a minimum value of the gain when ALC(AGC) feature is running.ALCGainMax Expert R/W Sets a maximum value of the gain when ALC(AGC) feature is running.