An industry-first crosstalk testing platform consisting of a family of loss and insertion-crosstalk ratio (ICR) designed to challenge 6-32 Gbpsec systems and PAM-4, 56 Gbpsec. This is an industry-first crosstalk testing platform consisting of a family of loss and insertion-crosstalk ratio (ICR) designed to challenge 6-32 Gbpsec systems and PAM-4, 56 Gbpsec. ICR is a basic measure of signal versus crosstalk energy (similar to signal/noise) and provides 50 (very low crosstalk) to 15 (very high crosstalk) for both 10 Gbpsec and 28 Gbpsec systems. Crosstalk energy and victim loss can further be tuned with optional pad kit. Structures can be combined with other platforms or on-board structures using optional low-skew <1 psec matched cable kit.