AD-131GE
19
7.3. Input and output circuits
In the following schematic diagrams, the input and output circuits for video and timing signals
are shown.
7.3.1 Iris Video output
This signal can be used for lens iris control in Continuous
mode. The signal is taken from the CCD sensor output
through the process circuit but as the reverse
compensation is applied, the signal is not influenced by
the gain settings. The video output is without sync. The
signal is 0.7 V p-p from 75
without termination.
This signal is taken from sensor 1 but it can be changed
by the register. In order to get this signal, DIP switch
DSW700 should be changed. Refer to 5.4.3.
Fig.14 Iris video output
7.3.1.1 Iris Video input and output
The lens-iris video output level at pin 4 of the 12-pin Hirose
connector is 700 mV for 100% video output level. The iris
video signal is taken after the gain circuit. However,
negative compensation is applied to the iris circuit, thus the
gain setting has no influence for controlling auto iris lenses.
It is without sync.
Fig.15 Iris Video output
7.3.1.2 Iris video output select
As the factory default setting, the signal from AD-131GE #0 is used for iris control. The setting
can be changed in the following screen. This screen is effective if AD-131GE #0 is selected.
CCD out
Analog Out
150mV
700mV
173mV
↑
800mV
DA
1μ
1K
2K2
0.1μ
+5V
IRIS Video Out
0
100% Level
700
200
An
al
og
Ou
t
[m
V
]
CCD Out [mV]
800
230
Содержание AD-131GE
Страница 80: ...AD 131GE 79 ...
Страница 81: ...AD 131GE 80 ...
Страница 82: ...AD 131GE 81 ...
Страница 84: ...AD 131GE 83 ...
Страница 91: ...AD 131GE 90 Change History Month Year Revision Changes July 2012 1 0 New issue ...