GE Security Legend IP, Руководство пользователя

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Chapter 5
Advanced programming
53
Table 6. Exposure control settings
Operation
Exposure control setting
Auto Shutter Iris Manual
Function
controlled by the
iris keys Backlight
compensation
(iris + for on and iris -
for off) Shutter speed (sec) Iris setting (F-stop) First, iris setting (F-stop),
until limit reached.
Second, shutter speed
(sec), until limit reached.
Third, gain (dB).
Automatic
adjustments • Iris setting (F-stop)
• Shutter speed (sec)
• Gain (dB)
Except when the
shutter speed is
below 1/60 sec. NTSC
or 1/50 sec. PAL. • Iris setting (F-stop)
• Gain (dB) • Shutter speed (sec)
• Gain (dB) N/A
Available controls Autoslow shutter • Lowest shutter speed
• Return to auto Return to auto • Lowest shutter speed
• Return to auto
Table 7. Exposure options
Operation
Exposure option
Autoslow shutter Lowest shutter speed Return to auto
Available for
which control
setting Auto • Shutter
• Manual • Shutter
• Iris
• Manual
How it works Automatically slows the
shutter speed below the
normal setting as needed
to compensate for low-light
conditions. Sets the lowest allowable
shutter speed. Returns the dome to Auto exposure mode
with any manual pan or tilt movement,
thereby returning the iris toggle key to
function as a control for the shutter speed,
iris setting, or gain, depending on the
exposure mode selected.