This CATV Scrambling and Descrambling charge management system (Full channel) is applied to the digital TV / analog TV mixed transmission CATV network on the 550MHZ (or 750MHZ) bandwidth.

It can be individually used to analog TV 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; small effect to analog 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 can't be stolen, there is no need to change the original 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, won't influence the video effect.

5: The RF of circuitry is scrambled completely to avoid lawless connection

6: Little front-end equipment (1 scrambler and 1 authorizor), 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 don't pay for the charge, we can scramble it by computer to avoid teleview, only after they paid, they can view the TV.

Technical specification

System Technique:

Max Scrambler bandwidth: 45-750MHZ

Serial interface: RS232

Suitable system: PAL-D/K / NTSC

Numerical control scrambler technique:

Working frequency range: 45-750MHz

Output MER of RF: 75-85db μV     

Input MER of RF: 75-85db μV     

Restraining Noise ratio: ≥60db

Input / Output impedance: 75Ω

Descrambler technique:

Working frequency range: 45-750MHz

Output MER of RF: 65±10db μV     

Input MER of RF: 65±10db μV     

Restraining Noise ratio: ≥51db

Input / Output impedance: 75Ω

Working principle:

After mixed the TV programs for all channels, scramble in the scrambler, then output the amplificatory TV programs then into the HFC network. The TV signal is scrambled signal, so the TV signal on the main and branch line can't be viewed. We can view the TV program only after connect our specified descrambler box.