Monacor TVCCD-624 Mode D'emploi page 15

7.1 Adjustment of camera functions
Picture synchronization
With the DIP switch (9a) set to "INT", the camera is
synchronized via an internal clock generator (stand-
ard adjustment when using a single camera).
With the switch set to "LL" ("Line Lock"), the
mains frequency will synchronize the change of pic-
tures; this adjustment is required when several
cameras are used (e. g. in systems with camera
switchers, multiplexers). In case of vertical rolling of
the picture at the moment of camera change-over,
adjust a steady picture by turning the phase adjust-
ing control (11) with a small screwdriver.
Note: Mains synchronization is possible only if the
camera is operated with a 24 V AC voltage. In
case of DC supply, the camera must be set to
internal synchronization.
AGC (automatic gain control)
Use the DIP switch (9b) to adjust the gain factor for
the automatic gain control – to increase the video
signal level in case of poor illumination. The standard
adjustment is "AGC". In case of great variations in
the luminous intensity, it may be possible to obtain
an optimum control by the camera in the position
"AGCMAX".
Gamma correction factor
DIP switch (9c) offers an alternative between the
gamma values 0.45 (" γ 1") and 1.0 (" γ 2"). The stand-
ard adjustment is 0.45. If an optimum adjustment of
the contrast on the monitor is impossible, set the
switch to " γ 2".
Automatic electronic shutter
When using a lens with manual iris control, set the
DIP switch (9d) to "MRIS". In this position, the auto-
matic electronic shutter is switched on: The ex-
posure time is automatically adjusted to the current
brightness. The camera operates with shutter times
of / – / s.
1 1
50 100 000
When using an AI lens, set the switch to "OFF".
BLC (backlight compensation)
In case of backlight, i. e. light which hits the object
directly or at an angle from the front, the object of
which the picture is to be taken will be underex-
posed. This is also the case if the picture of the
object is taken against a very bright background. The
backlight compensation (BLC) will prevent this
effect. For activating this function, set the DIP switch
(9e) to position "BLC". Without any disturbing back-
light, set the switch to "OFF".
Flicker compensation [for TVCCD-624(E)COL only]
DIP switch (9f) allows activation and deactivation of
the flicker compensation. The standard adjustment is
"OFF". If the pictures flickers on the monitor, set the
switch to "FLON".
Auto Exposure (AE)/Manual Exposure (ME)
[for TVCCD-624(E)COL only]
With the DIP switch (9g) set to "AE", the exposure is
automatically controlled: in case of an AI lens by
GB
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