Bug #5890
closedNoise at receive
0%
Description
Hello, I tried to make a board from sfp_experimenter. I put the DNP resitor, because the signal at OUTPUT of LVDS convertor was zero. Now, I have another problem, I transmit a square signal from the generator and all is good, but when I don't transmit a signal, at the receive, I found some signal noise, with frequency between 20MHz and 300MHz.
Updated by laforge about 2 months ago
you'd have to check what happens at the spf rx differential output. If that already contains the "noise", then there's nothing the differential receiver on the sfp-experimenter board can do. it will simply convert anything (including "noise") from differential to single-ended.
you could also try with some other type/brand SFP modules, if you have several available.
Updated by tnt about 2 months ago
SFP modules don't work at DC.
You always need to modulate your signal somehow.
