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1-2 Operator's Manual LDK 23HS mkII - HS Camera System Introduction
Technology
The LDK 23HS mkII is a lightweight EFP/Studio high
speed camera system which uses 2/3" frame transfer
sensors with Dynamic Pixel Management (DPM).
Super Slow Motion
Unique live slow motion capability. The LDK 23 HS
mkII scans at three time the normal rate. Instead of
scanning at 50 Hz for PAL and 60 Hz for NTSC the LDK
23HS mkII scans at 150 Hz for PAL and 180 Hz for
NTSC.
Various preset settings for artificial light conditions
ensure a slow motion picture without pulsing light
effects.
Sensor technique
Frame Transfer Dynamic Pixel Management allows
the format of the sensors to be switched between 4:3
and 16:9 aspect ratio at the touch of a switch without
loss of horizontal resolution. The 1000 pixels per line
in both formats ensures that there is no loss in
horizontal viewing angle.
Another aspect of the 2/3" DPM sensors is that there
is no loss of vertical resolution between formats. They
have a highlight compression/dynamic range of 400%
and a high linear sensitivity over all camera lens
apertures. The frame transfer technology ensures that
there is no lag nor smear.
The Intelligent Continuous Automatics facility provides
automatic control of black levels and black shading.
Each DPM sensor has two lines of sensor elements
that are protected from incoming light and therefore
give a true indication of black. The black reference
signal that they provide is used in the camera
preprocessor circuits to monitor temperature changes
which, if not corrected, would alter the black level. In
this way continuous automatic correction is applied
without operator intervention.
Film-like characteristics
To achieve film-like quality it is necessary to emulate
the softly limiting S-shaped transfer characteristics of
film. This is done by compressing the TV camera's
near linear characteristics above a certain point, the
knee. The pivoting knee circuit of the LDK 23HS mkII
camera system adapts both the knee point and the
compression ratio according to the highlight content of
the picture. Significant highlights lower the knee point
to give more room for compression, while minor
highlights only affect the upper part of the transfer
characteristic. Signals below the knee point remain
unaffected. As a result, compression is only applied
where necessary and in proportion to the highlight, and
the pictures obtained have true film-like quality.
Advanced Triax Features
The Triax system allows remote control of camera up
to a distance of 800 meters (1000 meter with minor
performance degration). The Triax system uses YUV
transmission.
The communication facilities provide for two-wire or
four-wire high quality intercom signals.
The LDK 23 HS mkII is compatible with the existing
Thomson Multimedia Broadcast Solutions Series 9000
Universal Camera Control system. Base station outputs
include triple and normal scan serial digital video
signals.
SuperXPander
The optional LDK 4482 SuperXpander enables the
camera to be used with large lenses so extending the
camera's use in studio and EFP situations.