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Spirent KB Article
Doc ID: FAQ18461
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Spirent TestCenter: Does the DX3/PX3 card support QSFP28
Yes, but only in the latest releases:
Seems that around 5.16 release (November 2020 release) PX3/DX3 cards which support NRZ card were released
Need to set the card to STC-NRZ Mode performance mode under port level - General Tab and then
Prior to 5.13 the cards only supported PAM 4 encoding while QSFP28 requires 25 GB per lane NRZ encoding
Please refer to the following KB that may be of your interest:
- Spirent TestCenter: Can a QSFP28 interconnect be used in a PX3-400G port in 100G NRZ mode?
- Spirent TestCenter: What is the difference between QSFP28, QSFP-DD, and QSFP56 transceivers?
Product : DX3,PX3