Bosch ndn-921 用户手册

FlexiDomeHD 720p IP Camera

Advanced Mode | en

Bosch Security Systems

Installation and Operation Manual

AR18-10-B013 | v1.52 | 2011.06

Adjust the video output level (-15 to 0 to +15).

Select the range within which the ALC will operate. A positive 

value is more useful for low-light conditions; a negative value is 

more useful for very bright conditions.

Some ALC adjustment may improve scene content when Smart/

BLC is enabled.

Adjust the balance between peak and average video control 

(-15 to 0 to +15). At -15 the camera controls the average video 

level, at +15 the camera controls the peak video level.

A negative value gives more priority to average light levels; a 

positive value gives more priority to peak light levels. Video iris 

lens: choose an average level for best results (peak settings 

may cause oscillations).

Adjust the speed of the video level control loop (Slow, Medium, 

or Fast). For most scenes it should remain at the default value.

–

Fixed — allows a user-defined shutter speed.

–

AES (auto-shutter) — the camera automatically sets the 

optimum shutter speed. The camera tries to maintain the 

selected default shutter speed as long as the light level of 

the scene permits.

Select the shutter speed (1/25, 1/50, 1/100, [1/30, 1/60, 1/

120] 1/250, 1/500, 1/1000, 1/2000, 1/5000, 1/10K) for the 

default (AES) or fixed value. 

In AES mode, the camera tries to maintain the selected shutter 

speed as long as the light level of the scene is high enough.

In Fixed mode, select the shutter speed.