Dangerous, how many people have used the cable TV digital set top box crack upgrade tool .

Hello sad 123on,You don't give points.,I'll pass you my space**,Which family doesn't have a few TVs now?

Tips to solve the set-top box one machine to watch,Change a set-top box to let multiple TVs watch the method idea,The principle of the set-top box is to turn the digital TV signal into a traditional analog all-TV signal,The front end of the set-top box is set up with a smart charging card,You can set up a switch in the future,Open or close the TV digital signal of each set-top box customer at will,The role of the set-top box is to turn the digital signal in the wired optical cable into an analog all-TV signal,The second half of the set-top box is a remote control board,Replace the remote control circuit of the original TVIf you take out the analog signal of the whole TV at the input end of the internal tuner of the set-top box, a TV socket is drawn out, and then a TV branch device is connected, you can use one-third, four-quarter, six-part and so on, with two TVs, three TVs, five TVs. 。Completely crack the monopoly of the set-top box one by one, you can find someone who understands the knowledge of electronic circuits to help modify, spend less than ten yuan, and anger the national monopoly of cable TV!

Originally, set-top box manufacturers can produce a belt.

Second, the belt. Three, a belt and four set-top boxes, but they just don't do it, helping to do evil, it's really unfair.

Take out the full TV signal at the input of the internal tuner. At the input end of the set-top box is a compressed digital signal, which is demodulated to output a full TV signal. This output is also the input of the internal tuner.

Take out the whole TV analog signal at the input end of the internal tuner, lead out a TV socket, and then connect a TV branch, which can use three branches, four branches, six branches, etc., which is completely feasible (in order to match the impedance, it is recommended to use a splitter, in order to reduce the interference between TV sets). It is best to add one level of UHF amplification (about 10dB to compensate) the signal loss caused by branch distribution before allocation.

The working principle of the set-top box: input the compressed digital signal, decode to get the full TV signal, after internal tuning, and then intermediate frequency amplification, after frequency discrimination, separate the output** and audio. Externally connected to the ** audio input terminal of the TV.

The process of modification does not need to cut off the original set-top box circuit, only need to use a 75 ohm feeder and a 1000p or so porcelain dielectric capacitor (to prevent the impact of short circuit on the original machine) to weld it at the output point of the whole TV signal, and ground the outer sheath of the 75 ohm feeder (the so-called grounding is the common wire of the set-top box, that is, the negative pole of the power supply).

I wish you all success in the transformation, don't bother to carry the big pot in the future!

With the continuous popularization of digital TV across the country, "a TV must be connected to a digital set-top box" has become an ironclad concept. Because of this, there are many citizens who hope that there is a product on the market that can realize that a set-top box can share several TVs and watch TV programs of different channels independently. From this phenomenon, it can be seen that this product is in great demand in the market, especially for customers with more TVs.

The current stage of digital TV signal transmission process:

Radio and power station *** set-top box [digital signal].

Set-top box*** TV [analogue signal].

Through the understanding of the above digital TV signal transmission process, let's take a look at the real sharing principle of the 12-channel digital TV sharer of Gator. One of the core technologies is: to make their own signal sources of different contents, that is to say, to collect their own signal sources, and then mix the collected signal sources of different contents, and then transmit them to each TV set through the TV network, so that each TV set can watch TV programs with different contents.

The specific sharing principle is as follows:

Step 1: Make your own input sources for different contents.

1. Use 12 set-top boxes as input signal sources.

2. Use 12 *** machines as input signal sources (*** output is used as movie channels).

4. Use 12 satellite antennas as input signal sources.

5. Cross-use the products of the above four schemes as input signal sources.

Step 2: Output a signal source with different contents.

Output your own 12 different content sources to the main external line (before the amplifier) of all your TVs, and you can watch all 12 channels on all TVs.

With the above two steps, all TV sets can share TV content.

Because all the signals that you can watch programs on TV before have to be transmitted from the radio station through the main external line to each TV, now we don't need the radio station to give the signal, the signal we use is the signal output from the digital TV sharer (12 signal sources), so that the signal from the digital TV sharer is sent to each TV through the main external line, and all TVs can watch the TV content of these 12 channels.

In fact, with such sharing technology, you can even make your own.

Fifty, sixty sources (equivalent to.

5 to 60 channels), and then output to each TV set, so that each TV set can watch different channels of TV content independently.

Compared with the electric appliance of the TV, the built-in software program of the cable TV set-top box, if the consumer can successfully crack it, will allow themselves to enjoy more complete functions and benefits. However, for many consumers, especially the elderly, cracking is a technically demanding thing that may not be able to be completed by themselves. In response to this situation, experts will introduce you to the cable TV set-top box cracking method based on specific examples, hoping to help you.

The principle of cable TV encryption is as follows: the TV station first inputs the TV signal into the digital encryption equipment, and then the TV signal is encrypted by the Fansen algorithm and then outputs the ordinary radio frequency signal after the decryption equipment (set-top box) of the terminal is decrypted, and then sent to our terminal receiving equipment, and the TV plays the picture. Because the TV can only receive ordinary radio frequency signals (analog signals), it can only be decrypted and then input to the TV, and the TV will play the picture.

The encrypted signal is input through the input terminal, and the interference signal is removed by the relevant circuit inside it (scrambling encryption), and then the normal signal is output through the output terminal. There is an external condition for whether the decryption circuit works, that is, the signal fed back by the high-frequency head of the TV. If this signal is not fed back to the set-top box, the descrambling circuit will not work, and the undecrypted signal will still be output, so it cannot be viewed normally.

The frequency band of its decryption is divided into several segments of decryption,If the TV is receiving3channels,The high-frequency head of the TV will feedback the resonant frequency of the 3 channels to the set-top box,The set-top box can output 1-5 channels of normal signal,And so on。

Place the set-top box near the high-frequency head of one of the TVs so that it can watch normally, and then use the splitter to distribute the signal from the output to the other TV. One disadvantage of this approach is that the other TV can only receive 5 channels around the channel received by TV 1.

An open multivibrator is made with a non-and gate circuit or a 555 circuit, and its resonant frequency can cover the entire frequency band of cable TV. (The production cost is about 6 yuan) put the harmonic vibrator of the sedan field next to the set-top box. Let the set-top box receive the signal from the vibrator, and then use the branch to distribute multiple TVs from the output of the set-top box, so that all TVs can receive signals from all channels.

Use a high-frequency transistor such as 9018 to make a high-frequency transmission circuit, and use the RF output to transmit again, as long as the transmission power is small, so that the set-top box can receive it. Or use the coaxial ** line branch to access the input or output terminal, remove the outer shielded wire, leave only the middle wire about 1 meter long, and wrap this wire around the set-top box. Let the leaked signal be induced to the set-top box to receive.

Through the above-mentioned cable TV set-top box, you can realize the crack, so that you and your family can receive more channel signals and enjoy a more relaxed and happy home life. The author also hopes that the above content can help you give full play to the role of set-top boxes and make the best use of things.