Wideband Triax Transmission; Advantages Of Sony Wideband Triax Transmission - Sony BVP-900 Series Product Information Manual

7

WIDEBAND TRIAX TRANSMISSION

7-1. Advantages of Sony Wideband Triax Transmission

To avoid the differential time delays and differential gain that may
arise with RGB systems, the Sony Wideband Triax Transmission
system uses video component signals (Y, R-Y, B-Y). The luminance Y
signal bandwidth is 10 MHz, and that of the color difference signals
is 6 MHz. The color difference signals are transmitted by quadrature
modulation of a signal carrier, providing high efficiency in spectrum
utilization. All components employ full double-sideband amplitude
modulation with synchronous detection. This affords maximum
signal-to-noise ratio and optimum high frequency response.
This component (Y, R-Y, B-Y) transmission method is perfectly suited
to CCD cameras that incorporate Spatial Offset technology for higher
resolution and minimum aliasing. In a component (Y, R-Y, B-Y)
AUDIO
AND
DATA
Figure 7-1 Frequency Allocation for CCU-700A/700AP
Frequency Allocation for CCU-700A/P
(Wideband)
CHU
CCU
22.5 MHz 45M Hz
±10 MHz ±6M Hz
Y R-Y/B-Y
(QUAD-DSB) (QUAD-DSB)
Skin Gate
(±2 MHz)
10 20 40
2.5 3.0 3.6 3.9 4.3
CCU
transmission system, the R, B and G signals are linearly summed to
form a luminance (Y) signal before triax transmission. Precise phase
offset is maintained between the R, B and G signals by this spatial
offset process. Thus, the inevitable differential time delays between
channels of an RGB system are avoided.
The Sony Wideband Triax Transmission System provides the
following advantages, when used with the CCU-700A/700AP Camera
Control Unit.
* Long triax cable operation, up to 2000 m with ø14.5 mm cable
with return video (up to 1000 m with ø8.5 mm cable)
* Teleprompter video channel up to 1000 m with ø14.5 mm cable
(500 m with ø8.5 mm cable)
* Skin tone gate transmission for picture monitor
* Outstanding horizontal resolution of 850 TV lines at CCU output
CCU CHU CHU
70M Hz 97.25 MHz
±7M Hz ±5.5 MHz
RET VIDEO PROMPTER
(FM) (AM)
60 70 90
5.6 6.2 6.7 7.1 7.4
CHU CHU CCU
AUDIO and DATA
CCU
100
MHz
6
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