Improves SERDES Testing – Test Pre-Silicon – EDA Kit Friendly
ISI-224 Advanced Loss Modeling Platform Set
224 Gbaud Advanced SERDES Inter-Symbol Interference (ISI) Loss Platform
The ISI-224 platform is purpose-built for advanced PAM4 SERDES development and pre-silicon validation, supporting up to 112 Gbaud (224G PAM4). It generates true ISI loss through physical dielectric, skin-effect, and conductor losses only—no artificial stubs or resonances. Its low-weave laminate and controlled connector transitions eliminate group delay variation and block resonance, ensuring clean, consistent signal degradation.
Each platform features 21 stripline differential pairs of varying trace lengths.
Connector Types Available: 1.35mm | 1.00mm | Download Datasheet >
Features:
- Supports 224G PAM4 compliance and DOE-style characterization
- Selectable insertion losses: –8 dB to –28 dB at 56 GHz (1 dB increments)
- Very low return loss out to 112 GHz
- Spread-weave laminate for minimal group delay noise
- Passive, causal S-parameter files included
- Measured COM metrics provided
- Optional matched low-skew cable pairs: ≤350 fs, 70 GHz rated
- Web-based training with WRT Applications Engineer
What’s Included:
- (3) fully assembled ISI platforms with 1.35mm compression mount connectors
- NIST-traceable TDR reports for all traces and connectors
- Ruggedized case for transport and storage
- Measured S-parameters and COM metrics (USB drive)
- Optional: Matched cable bundle with 375 fs skew (to 70 GHz)
- Personalized training via web meeting with WRT engineer
Product Details – Model ISI-224
Part Number: 917-0002-00
Model Name: ISI-224 Advanced SERDES Loss Platform Set
Supported Data Rates: 10–56 Gbpsec
Connector Type: 1.35mm (assembled, replaceable)
Electrical Specifications – ISI-224 Platform
| Parameter | Value |
|---|---|
| Maximum Insertion Loss | 1.6 dB (0.5 m), 2.8 dB (1.0 m) |
| Minimum Return Loss | 14.5 dB |
| Intra-pair Skew | 5 degrees (0.35 ps) |
| Input Impedance | 50 Ohms |
| Max Input Voltage Levels | Not Applicable |
| Connectors | 1.35mm compression mount, replaceable |
| Screw Torque | 0.5 – 1.0 in·lb |
| Compliance | RoHS Directive 2011/65/EU |
Insertion Loss vs Trace Length (at 56 Gb/s)
| IL (dB) | Length (in) | Length (mm) | IL (dB) | Length (in) | Length (mm) |
|---|---|---|---|---|---|
| -1.8 | 1.1 | 28.4 | -21.3 | 15.6 | 396.7 |
| -3.4 | 2.2 | 56.6 | -24.3 | 17.9 | 453.6 |
| -4.8 | 3.3 | 85.1 | -27.4 | 20.1 | 510.9 |
| -6.3 | 4.5 | 113.3 | -30.6 | 22.3 | 566.9 |
| -9.2 | 6.7 | 170.2 | -33.4 | 24.5 | 623.6 |
| -12.3 | 8.9 | 226.8 | -36.5 | 26.8 | 680.5 |
| -15.2 | 11.2 | 283.5 | -43.3 | 32.4 | 822.2 |
| -18.1 | 13.3 | 340.1 | -39.1 | 39.1 | 922.1 |
Optional Ultra-Low Skew Matched Cable Pair
| Parameter | Specification |
|---|---|
| Connector Type | 1.35mm male on both ends |
| Cable Type | Black 1206 coaxial, 1 meter |
| Skew | 0.35 ps (5 degrees), 375 fs option |
| Return Loss | 16 dB or better through 50 GHz |
| Bandwidth | Up to 70 GHz |
| Identification | Red/Green heat shrink + center label |
| Accessories | Insertion & Return Loss graphs + S-params (USB) |
| Warranty | 3-year replacement guarantee |
| Compliance | RoHS 2011/65/EU (with amendments) |
