Ultrak KC5300, Руководство пользователя

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C. Electronic Iris (On/Off) – Automatically varies the camera’s
shutter to mimic auto iris control, allowing fixed or manual iris
lenses to be used in a wider range of area.
D. Gamma Correction (On/Off) – Ensures a linear correlation of light
gain on the entire system.
E. AGC (Automatic Gain Control) (On/Off) – This electrical circuit
attempts to keep signals at a constant level. This control is very
useful while using the camera at low light levels. The higher the
number, the better the signals. Typical values include 12-20dB
(i.e., a gain of approximately 4X-10X).
2.3 MANUAL IRIS LENS ADJUSTMENT
When using the manual iris lens, turn the iris ring on the lens to
the OPEN position and adjust the manual iris for the appropriate
range. Adjust during the brightest conditions, opening the lens
without saturating the picture. Set the EI switch to ON. Adjust the
lens opening for the minimum F-number yielding a good picture
under the brightest scene conditions.
The manual iris is used in indoor applications where lighting from
windows can considerably affect the light level of the room.
2.4 VIDEO-TYPE AUTO-IRIS LENS INSTALLATION &
ADJUSTMENT
The KC5300 camera supports video-type auto iris lenses to
adjust for changing light levels. Perform the following steps to
install and adjust a video-type auto-iris lens.
A. Thread the video-type auto iris lens on to the lens mount.
B. Connect the lens control wiring to the three position terminal
block on the back of the camera. The following diagram
illustrates the Pin connections. Red, white and black are the
most common colors used for wiring on video-type auto iris
lens.