Various issues with alt2gxb and altlvds_tx

Hi Darkwave,

thanks a lot for your answer. It was clear to me that if I AC couple it does not make sense to transmit long sequences of 1's and 0's. So no, I do not want to AC couple anything. I also don't care about receiving the data.

Actually to make my point a little bit clearer, there is no data to transmit. I just need to be able to accurately time transitions in my signals. An example: I use 1 Gbps speed (1 bit, 1 ns); for 100 ns I want to keep my output high (so I send all 1's) but at exactly t=100 ns I pull it low (send a 0), which lasts for the minimum amount of time possible (that is, around 1 ns) and then the signal goes high again.

I want to use the transmitter because it allows me to obtain such resolution, but there is no receiver. I am wondering if I can do that with the FPGA and its transmitter / receiver circuitry or not. Or if I can just use the LVDS serdes.

And I had already gone through the course, it was actually pretty useful but it deals more with "conventional" use of the system.