GRASS VALLEY LDK 4000 MKII, Руководство пользователя

Страница: 14 / 108

v1.0
LDK 4000 MKII User’s Guide | Introduction 1-2
1.1.3 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.
1.1.4 Focus assist
With HDTV, focusing is even more critical than before. The LDK 4000 MKII has special
patented focusing aids. A unique viewfinder zoom function enlarges the viewfinder image
instantly with a simple press-button action, thus providing improved means for focusing. A
patented crawler circuitry adds motion in the viewfinder to objects in sharp focus.
1.1.5 Different versions
The LDK 4000 MKII camera head is available in two versions - 1080i or 720p. These versions
support either 1080i or 720p HD formats in 50 Hz and 59.94 Hz. You decide when ordering
which version you require. These standards cannot be changed later.
1.1.6 Advanced TriaxHD features
TriaxHD, which is a further development of the Emmy Award winning triax transmission
system, makes the camera compatible with industry standard triax cables. This allows the
reuse of existing, reliable and valuable cable inventories.
TriaxHD allows video transmission and remote control of cameras up to a distance of 3300 ft
(1000 meters) and beyond, using industry standard 14mm triax cables. It is based on 30MHz
full-bandwidth 4:2:2 transmission (Y/Cr/Cb components).
The double side band modulation technique used in combination with Y/Cr/Cb transmission
ensures linearity, resolution and an optimal signal-to-noise ratio over the maximum cable
length. Bandwidth efficient channel combining and equalization techniques minimize cross-
talk and interference. Teleprompter and viewfinder signals maintain high performance with
relatively long cable lengths.
The communication facilities provide for two-wire or four-wire high quality intercom signals.
Full camera control is provided via a C2IP Ethernet-based control network.
The TriaxHD adapter is equipped with a rotary triax connector which provides freedom of
movement during portable use of the camera and protects the connector from being
damaged in near-floor conditions.
TriaxHD Base Station
The TriaxHD Base Station, as well as providing high definition outputs, optionally offers
simultaneous high-end SDTV outputs. This facilitates a gradual and managed transition from
SDTV to HDTV.