THOMSON LDK 200 Triax, Руководство оператора

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1-2 Operator's Manual LDK 200 Triax Introduction
Technology
The LDK 200 Triax camera combines a multi-role
digital camera head using 2/3-inch CCD sensors with
a triax adapter. The result is a flexible camera that is
equally at home in the studio or out on location in an
OB environment.
Camera Head
The Frame Transfer CCD DPM sensor offers superior
performance and can handle highlights of up to 600%.
The 2/3-inch sensors have a high dynamic range and
high linear sensitivity over all camera lens apertures.
Frame Transfer technology ensures that there is no
lag nor smear. The Frame Transfer DPM sensor uses
Dynamic Pixel Management which allows the format
of the sensors to be switched between 4:3 and 16:9
aspect ratios at the touch of a switch without loss of
horizontal or vertical resolution. The 1000 pixels per
line in both formats ensures that there is no loss in the
horizontal viewing angle but also ensures high resolution
in the red, green and blue channels.
Digital Processing
The advanced digital processing of the camera is
based on 12-bit A/D converters and more than 20-bit
internal processing. Two DSPs combine all major
camera functions in the digital domain, including
knee, gamma, contour, matrix and colour correction.
The intelligent continuous automatics facility provides
automatic control of black levels and black shading.
Each sensor provides black reference signals that are
used to monitor temperature changes. This means
that continuous automatic correction is applied without
operator intervention.
The digital contour processing uses full amplitude
video RGB signals via an extended dynamic range
contour circuit.
Colorimetry is selected by means of a variable 6-point
digital matrix or via preset matrices. Digital gamma
circuits provide a wide range of standardised gamma
curves and enable soft contrast in black scenes to be
enhanced, together with hard contrast and saturated
colour in bright scenes. The matrix and gamma
sequence is software programmable for precise colour
matching.
Film-like characteristics
The pivoting knee circuit adapts both the knee point
and the compression ratio according to the highlight
content of the picture to emulate the softly limiting S-
shaped transfer characteristics of film. Digital True
Colour Knee circuitry maintains the correct hue for
compressed highlights, reproducing colours faithfully,
even overexposed skin tones.
Digital contrast circuitry provides a black stretch
function for more detail in black areas and a black
press function for improving the contrast impression
by simulating the S-curve of film.
Advanced Triax Features
The full bandwidth of the Triax system allows remote
control of camera up to a distance of 2,400 meters
(7,875 feet). The Triax system uses full bandwidth R,
G and B signals. The double sideband modulation
provides automatic compensation of the amplitude
characteristics of each video channel. This results in
the best possible linearity, lower crosstalk and higher
signal to noise over the maximum cable length. The
chroma key quality is excellent as the primary colours
do not have to be derived. Teleprompt and viewfinder
signals maintain high performance even with long
cable lengths.
The communication facilities provide for two-wire or
four-wire high quality intercom signals.
The LDK 200 Triax is plug compatible with existing
Philips base stations and full camera control is
provided via Series 9000 Universal Camera Control
system. Base station outputs can include an optional
serial digital video signal.
SuperXPander
An optional SuperXpander enables the camera to be
used with large lenses so extending the camera's use
in studio and EFP situations.