PXH820 User’s Guide –
Dolphin Interconnect Solutions
Page 7
Cable Ports and Connections
The PXH820 is designed to support both long and short cables and comes with two types of PCIe link tuning
parameters. The default configuration supports cables between 0.5 and 3 meters or fiber cables (AOC). To use
cables longer than 3 meters, please use DIP-Switch DIP4 to enable the long cable tuning.
Cable ports
The PXH820 has a quad SFF-8644 connector. Each port implements 4 PCIe lanes. The ports are
numbered as shown in Figure 1 Front panel below. The black thick line indicates the position of the
PCB.
The PXH820 cable connector is compliant to the SFF-8644 industry specification and supports x4/x8 Mini-SAS
HD cables or x4/x8 PCI Express 3.0 cables (PCIe 3.0 cable) compliant to the PCIe External Cabling Specification
3.0. Four x4 or two x8 cables are needed for full PCIe x16 connectivity. Currently, the PXH820 card does not
benefit from the new PCIe 3.0 cable, a future firmware release may add support for optional, advanced PCIe
networking management if PCIe 3.0 cabes are installed.
Active Optical Cables (AOC)
The PXH820 card is compliant with active fiber optic cables available from Dolphin (Part no: MSFCxxx). No
special configuration is required. Up to 100-meter fiber cable is supported.
REAR-IO
The PXH820 card is designed to support REAR-IO. Please contact Dolphin for more information.
Figure 1 Front
panel face plate
