multiple TV set-top box way to share a family which is now not a few ,
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TV?
tips to solve a one machine set-top box to watch and change a set-top box for TV viewing more than one method of thinking,
cheap nike air force, the principle is to set-top box digital television signal into a traditional All analog TV signal,
air force one, the front-end set-top box to set the smart charge card, you can set the switch in the future,
nike air force ones, free to open or close each customer's TV set-top box digital signal, the role of set-top box is wired cable in the entire digital signal into analog TV signals, the second half is a set-top box remote control panel, instead of the original TV remote control circuit, remote control select units, if the internal tuner in the set-top boxes out the input of all analog TV signals, external leads to a television outlet, connect a TV splitter, can use two-thirds, quarters ,
nike air force one, sixths, and so, with two TVs, three TVs, five television.... Complete a one machine set-top boxes crack the monopoly, we can find people who understand electronic circuit knowledge to help modification, to spend less than ten yuan , the National Cable TV monopoly mad! Originally set-top box manufacturers can produce the second area, along the three, along the four set-top boxes, but they just do not do to help Zhou as a sin, it is uneven ah.
in the input of the internal tuner out all television signals. Input in the set-top box is a compressed digital signal, after demodulation is output through the Composite Video signal. The output is the input of the internal tuner.
the internal tuner in the input of analog television signals out all external leads to a television outlet, connect a TV splitter, you can use the three branches, four branches, six branches, etc., it is entirely possible (in order to match the impedance divider is recommended to reduce interference between the TV). Before the best level in the distribution of ultra-high frequency amplification (about compensation 10db) signal loss caused by the branch distribution.
set-top box works: the input compressed digital signal, decoded by all television signals, and then through the internal tuner IF amplifier, frequency output video and after the separation audio. Through the external connection to the TV video and audio input terminals. Do not need to cut the original set- top box to change the process circuit, just use the 75 ohm feed line around Ceramic capacitor plus 1000P (to prevent external short-circuit when the impact of the original machine) TV signal output point in the whole welding look to the skin 75 ohm feeder ground (so-called ground,
air force one low, common ground is connected set-top box, which is the power of the negative) on it.
I wish you all a successful transformation, after the stop to go back a big pot of trouble!
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