A historical perspective on QSFP implementation

[fibermart]

For EMI control and EMC compliance, QSFP Cable copper cables are often built employing eight independently protected twin-axial transmission components within an outer shielding layer. The differential pair shields, system shields, and copper wire conductors are meticulously prepared, processed, and either laser welded or reflow soldered to the PCB pads. In the past, longer length reaches required the temporary usage of abnormally big 22 AWG wire-size cables due to increases in higher speed data rates. The requirements for copper reach lengths have significantly decreased over time, and some short applications now employ extremely small twin-axial components made of 33 AWG wire, which makes the outside diameter cable size more acceptable. For 1, 2.5, and 5 Gbps camera network applications, QSFP is still widely used.

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