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Technical Expertise
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This technical note explains in detail how Z800 Freya tests the link training process to help you optimize the performance of 112G SerDes devices.
It covers: presets, coefficient values and step sizes, link training, Xena’s LT algorithm, how to test the performance of a DUT’s LT, algorithm, FIR filter, the relation between emphasis and tap coefficients, & coefficient settings in Z800 Freya.
Z800q Freya (shown above) | Z800o Freya | |
Interfaces Port x Speed | QSFP-DD800 112G SerDes PAM4: 2 or 1*** x 400GE 4 or 2*** x 200GE 8 or 4*** x 100GE 56G SerDes PAM4: 1 x 400GE 2 or 1*** x 200GE 4 or 2*** x 100GE 8 or 4*** x 50GE 10/25G Serdes NRZ: 2 x 100GE 4 x 50GE 8 x 25GE 8 x 10GE & QSFP112 | OSFP 1x800GE 2x400GE 4x200GE 8x100GE 8x50GE |
XenaCompact | ✓ | ✓ |
XenaBay | ✓ (can only be installed in the B2400 chassis) | ✓ (can only be installed in the B2400 chassis) |
… for this technology