And these packages we have no clue what they are apart from that the ghost bit is counting them with a 3bit-counter so there was 6 or 7 of them if I remember correct. As you might have noticed if you try and get data from a transponder it sends more packages apart from the id number.
1111100100010110 in front and you have the id number to send.īUT this only work on old decoders. so we get a 1, and data of n-1 is 0 so for a 0 in data we get the same as the first bit so the second pair is 11 and then the data of n-1 is 0 so we get 00. the second bit is opposite of the first bit from bit n-1.įirst bit is 0+0+0+0.+0 because we count non existing bits as 0. This gets the first bit in the 2 bit pair signal that we send. The encoding algorithm is a checksum in sort, it works in a way that if you get a error in the signal it can tell what the next bit should be and fix it. Now run the numbers through the encoding algorithm. The ghost bits (x) are placed on every 4th position so you take one ghost bit then 3 of your number bits and fill out 0 in the end Then you need to add the "ghost bits" (called that because we had no idea what they do, they are NOT checksum, but rather counters for the unknown status packeges) To create a number convert it from decimal to binary 3456789 for example is 1101001011111100010101 in binary. I have made a java program, mentioned in this thread before, that can generate what ever number you want. I need help at this point, to explain to me how is the binary number that I put in the output, Thanks I can now copy the plot of cualqueir transponder type TX160 (equivalent to RC3) but I can not create my own number. In total the transitida frame is formed by 22 3.579MHz RF packages.
Is the first issue of the carrier does not matter at length, luggage the next 3 are all the same transponders, then comes the number, is what I assume and ulimas 3 are the same in all transponders and the latter has no importance length. And try many combinations but do not function. My transponder only copy the signal generated by an original, but not as generating its own number, can someone explain how.
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