ADM1491E

Question

Hello, 
 I try to use ADM1491E, but my signal is not correct. I connect this circuit in full duplex. I have tried to read the datasheet but I am not figureing it out. I thought this was easy, but.. 
 I just connected my TTL signal in and connected the twos chip together and thought this was going to be good. But its not it seems. I connect Z to B and Y to A, is this not correct? 
 I have about 10Mbs, is this a problem? 
 If hope anyone understand my questions. 
 Zpike

ConalW · Accepted Answer

Hello Zpike, 
 It looks like your connector pin-out/circuit outputs may be inverting the signal. Your bmp file schematic shows a crossover on Y/Z outputs from the ADM1491E to the connector. Unless your cable swaps these wires, this will invert the signal between the nodes. 
 I've attached a PDF to illustrate how your connector might connect Y to B and Z to A and vice-versa. The bottom drawing shows without the crossover, how Y will be connected to A and Z to B, and vice-versa. 
 Regards, 
 Conal)

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ADM1491E