If the server modules do not contain Ethernet PCIe cards, the S11 or S31 Node uses the onboard SFP+ ports for the access network. In any case, the access network ports can be configured as active-active (802.3ad) or active-backup.

Each server module in an S11 or S31 Node has these Ethernet ports: Four onboard 10Gb SFP+ ports that are used for the access network if neither the optional two-port 25Gb Ethernet SFP28 PCIe card nor the optional four-port 10GBase-T Ethernet PCIe card is present:

Each I/O module contains two SAS expanders and has four 4-lane 12Gb SAS ports. Each I/O module also has one serial port, which can be used for diagnostic functions, and two Ethernet ports, which are not used with an S11 or S31 Node.

Below is the S-matrix created from two port data to fill in three ports. Note that because the circuit is reciprocal, you can substitute S21 for S12 in any of the fields. But don't mix up S11 and S22! Using this simplification and preferring S21 over S12, the matrix becomes:

Connect Port 1 and Port 3 as directly as possible using a through-connection or short cable. Use MODE: 4-PORT, CH 1, and MEAS: S11 for measuring S31. Press TRACE: DATA TO MEMORY: SHOW MATH with MATH=DATA/MEM.

Plot the magnitude of S11 (port 1 to port 1), S21 (port 1 to port 2), S31 (port 1 to port 3), and S41 (port 1 to port 4) in dB of the real Btanchline coupler model in Rectangular graph. Add marker on S11 and S31 curves at 0.95GHz.

The Adnacom S31 is a multi-lane PCI Express Gen 3 extension system. The system consists of the Adnacom-H18 host adapter and Adnacom-R34 backplane connected by one or two cables. The system can operate with one or two QSFP transceivers, active optical cables (AOCs), or direct attach cables (DACs).

Nov 16, 2012 · Multi-Port 6. Two Single-Ended Lines 7. Cross Talk Information 8. Differential Line 9. Outrange 10. Reference. KEI Systems 2 S-Parameter Definition ... S31 S32 S33 S34 Port 3 S41 S42 S43 S44 Port 4 Port 1 [ ] Port 2 Two Single Ended Lines b1 S11 S12 S13 S14 a1 b2 S21 S22 S23 S23 a2 ...

Jan 11, 2019 · The directional coupler explained in the Pozar's book is a three port: input, output and coupled, while the reflected is not accessible. In this case you cannot measure S41. Your figure, instead, refers to a bi-directional coupler where all 4 ports are accessible.

Jun 2, 2015 · Set simulation frequency range from 0 to 4GHz with steps of 0.01GHz. Plot the magnitude of S11 (port 1 to port 1), S21 (port 1 to port 2), S31 (port 1 to port 3), and S41 (port 1 to port 4) in dB of the real Btanchline coupler model in Rectangular graph. Add marker on S11 and S31 curves at 0.95GHz. (1 pts)