Improves SERDES Testing – Test Pre-Silicon – EDA Kit Friendly – Combine Loss with Crosstalk with XTALK-56

ISI-USB4 – ISI Loss Modeling Platform Set for USB4 RX and DisplayPort 2.0 Sink

The ISI-USB4 Loss Modeling Kit is a next-generation intersymbol interference (ISI) platform designed for USB4 receiver calibration and DisplayPort 2.0 Sink compliance testing. It enables controlled jitter creation at speeds up to 56 Gbps NRZ and 112 Gbps PAM-3 and PAM-4, making it ideal for early-stage design validation and EDA simulation.

Unlike lossy structures that include impedance or resonance artifacts, true ISI is introduced only through dielectric and skin effect losses. Group delay variation—an important performance factor above 25 Gbps—is minimized using optimized PCB layout techniques, controlled-weave laminate, and pristine connector transitions.

Connector Types Available: 2.92mm compression-mount, replaceable | Download Datasheet >

ISI-USB4 Platform from Wild River Technologies

ISI-USB4 - ISI Loss Modeling Platform Set for USB4 RX and DisplayPort 2.0 Sink - Image 2

ISI-USB4 - ISI Loss Modeling Platform Set for USB4 RX and DisplayPort 2.0 Sink - Image 3

Features:

Designed for USB4 Rx and DisplayPort 2.0 Sink channel calibration
Supports SERDES testing from 10 to 56 Gbps
Return loss of –30 dB at 10 GHz
Insertion loss ranges from 2–10 dB (measured at both 5 GHz and 10 GHz)
Grounded via fences eliminate resonances and preserve jitter spectral purity
IEEE P370 Tier 1 signal integrity rated

Applications:

SERDES Receiver Tolerance Testing
Communication Channel Optimization using DFE, FFE, CTLE, and Gain Stage Elements
Jitter Analysis and Benchmarking
Related Products — XTALK-56

What's Included:

6 fully assembled and tested ISI platforms with custom stands
24 differential stripline traces of varying lengths
User Guide
- Matched cable set:
- Two 1-meter pairs
- Two 0.5-meter pairs
- Phase matching < ±5° at 40 GHz (347 femtoseconds)
- Max insertion loss to 10 GHz < 1.5 dB

Insertion Loss (IL) and Return Loss (RL) at 5 GHz and 10 GHz

Trace #	Board #	Trace Label	10 Gb/s @ 5GHz		20 Gb/s @ 10GHz
Trace #	Board #	Trace Label	IL (SD2D1)	RL (SD1D1)	IL (SD2D1)	RL (SD1D1)
1	1	1.131″	-0.40	-26.4	-0.83	-46.3
2	1	1.834″	-0.68	-30.8	-1.32	-39.9
3	2	2.538″	-0.89	-35.3	-1.79	-34.7
4	2	3.242″	-1.14	-42.7	-2.16	-35.1
5	3	3.945″	-1.45	-37.1	-2.73	-39.4
6	3	4.649″	-2.16	-32.7	-3.66	-36.4
7	4	5.352″	-1.88	-33.6	-3.62	-30.6
8	4	6.056″	-2.12	-31.5	-4.02	-43.1
9	5	6.759″	-2.36	-33.5	-4.49	-35.6
10	5	7.463″	-2.56	-37.5	-4.84	-34.7
11	6	8.166″	-2.94	-29.8	-5.51	-43.5
12	6	8.870″	-3.16	-34.0	-5.89	-33.0
13	6	9.573″	-3.31	-28.8	-6.23	-33.6
14	6	10.277″	-3.63	-27.3	-6.78	-33.9
15	5	10.908″	-3.73	-28.9	-7.04	-30.9
16	5	11.684″	-4.07	-27.4	-7.66	-31.9
17	4	12.387″	-4.26	-36.4	-8.04	-33.9
18	4	13.091″	-4.53	-35.8	-8.51	-37.8
19	3	13.374″	-4.51	-27.0	-8.50	-33.8
20	3	14.498″	-4.95	-32.1	-9.33	-33.0
21	2	15.202″	-5.22	-31.0	-9.75	-32.6
22	2	15.905″	-5.52	-31.6	-10.36	-43.6
23	1	16.609″	-5.72	-34.4	-10.75	-32.6
24	1	17.312″	-6.04	-30.9	-11.40	-30.6