For PCIE Gen3 Connector, it have to pass the following specification.
(1).Insertion Loss:
>= -0.5dB; f <=0.5 GHz. br>
>= -[0.8*(f-0.25)+0.5]; 2.5GHz
>= -[3*(f-5)+2.5]; 5GHz
(2).Return Loss:
<= -15dB; f<=3GHz. br>
<=5*f-30dB; 3GHz
<=-1; 5GHz
(3).Near-End Crosstalk:
<=-32dB; f<=2.5GHz. br>
<=-26dB; 2.5GHz
<=-20dB; 5GHz
<=-10dB; 10GHz
We apply both SMT and DIP Type connector test fixtures. With that, we also use TRL calibration method in order to get more accuracy data results.