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Chengdu Newstar Tele-Communicational Technology Co., Ltd
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| CATV Collective Scrambling and Descrambling Charging management system |
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Product Features |
| Quality certification: |
ISO9001:2000 |
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| Payment terms: |
N/A,L/C,T/T |
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| Description: |
This CATV Scrambling and Descrambling management and control system is applied to the digital TV / simulative TV mixed transmission CATV network on the 550MHZ (or 750MHZ) bandwidth.
It can be individually used to simulative TV web and digital TV network, and it can be used together in the scrambler and descrambler or addressable charge manage system, this is the unmatchable specialty not any other system can be comparable.
The Main functions:
1: Inductive control to avoid several televisions views the same TV programs.
2: With no effect to digital TV signal, the descramble quality is like DVD image; with small effect to simulated TV image, good reductive effect.
3: Using digital portfolio scrambling technology on RF, hard to uncover, high security.
4: The RF signal of circuitry is scrambled entirely and cant be stolen, there is no need to change the network, less invest, quick effect, easy installation, the main components is imported materials, stable performance and reliable operation
Other functions:
1: Wide channel, scramble and descramble the whole 45-750MHZ channels.
2: Inductive control to avoid several televisions views the same TV programs.
3: Using digital portfolio scrambling technology on RF, hard to uncover, high security.
4: Good image revivification, as it is scrambled on RF, not touch video frame.
5: The RF of circuitry is scrambled completely to avoid lawless connection
6: Little front-end equipment, there is no need to change the network, less invest, quick effect
7: Completely scramble, partial scramble to main stem, flexible usage
8: Scientific system management, intelligent management, simple operation, scientific managements.
9: Each descramble box has a fixed address code, if the user dont pay for the audience charge, we can scramble it by computer to avoid teleview, if they paid, we can open it.
Technical specification
System Technique:
Max Scrambler bandwidth: 45-750MHZ
Serial interface: RS232
Suitable system: PAL-D/K
Numerical control scrambler technique:
Working frequency range: 45-750MHz
Output MER of RF: =75±2db µV
Input MER of RF: =78±2db µV
Restraining Noise ratio: =51db
Input / Output impedance: 75O
Descrambler technique:
Working frequency range: 45-750MHz
Output MER of RF: 40-75db µV
Input MER of RF: 40-75db µV
Restraining Noise ratio: =51db
Input / Output impedance: 75O
Working principle:
After mixed the TV programs for each channel, scramble in the scrambler machine, then output the amplificatory TV programs then into the HFC network. The TV signal is scrambled, so the TV signal on the main and branch line cant be viewed, we can view the TV program after connect the descrambler box.
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