(Headend) Scrambling System: 1-Unique and advanced 2-High image revivification 3-High security and reliability 4-Low cost
(Digital headend)Scrambling System
The Scrambling technology is unique and advanced: the system adopts more group of numbers combination technology basing on radio:
1.1 The scrambling technology is unique and advanced: the system adopts more group of numbers combination technology basing on radio frequency in the front, and can scramble 45 to 750MHz at the same time. The terminal adopts group de-scrambling technology, and communication adopts computer addressable authorization way. Integrated with digital technology, analog technology, radio frequency and communication technology, the scrambling system makes it be the most advanced one among similar products at present. Moreover, scrambling and coding apply digital/ analog combination technology, and greatly improve reliability and security of system.
1.2 The image revivification is high: Because this kind of scrambling is done only on the radio frequency, and de-scrambling is done directly on radio frequency, not including modulation and demodulation (don't touch the video structure), the quality for de-scrambled image is high. Any scrambling modes set about from video without exception on the market at present: the synchronous head compressing, row cutting, polarity reversing etc., will certainly cause influence on image video quality and S/N.
1.3 High secrecy, security and reliability: Because of adopting more groups of numbers scrambling mode and scrambling time after time, possibility that the translator obtain the de-scrambled data will be stopped fundamentally in this way. Even if parts of them are decoded, the front only needs to change scrambling program, and the translator will be unable to de-scramble. Therefore, secrecy and security for the system is extremely high.
1.4 The management for System is scientific: The system uses the computer in elligent administrative software, as well as WINDOWS interface. It has authorized charge, inquiry, systematic maintenance and so on for front users; and it is easy to operate and use.
1.5 Low costs: with Radio frequency scrambling, the front devices are less (there needs a computer, a addressing machine, a scrambling machine and a charge administrative software respectively). Cost for user de-scrambling device is low, which not only reduce user's cost of investment, but also carry on scientific management to the network.
TLRF-2 system parameter
The max scrambling channel number
45~750MHz any channels
Serial interfaceRS-232
Adaptive TV modePAL D/K
TLRF-2S scrambling device
Working frequcney45~750MHz
RF input level75 - 85dBuV
RF output level78 ±2 dBuV S/N≥60dB
Input/output impedance75
TLRF-2DS de-scrambling device
Working frequcney45~750MHz
RF input level65 ± 10dBuV
Radio frequency output level65 ± 10 dBuV S/N≥51dB
Input/output impedance75.
Telecast Scrambling System(Digital Headend)
