Meeting Ethernet Return Loss Requirements with the KTA1550 Application Note
■The KTA1550 provides low-capacitance Ethernet line loading to minimize the impact on twisted pair return loss performance.
■Return Loss is a useful measure of the reflected power at the junction of a transmission line and terminating impedance. A low (negative dB) value of return loss represents lower reflected (lost) power and higher forward transmission in a communication system.
■Return Loss, as specified in the IEEE 802.3 Ethernet standard, is a system level specification at the RJ45 interface. The Ethernet interface is specified to match the 100Ω characteristics impedance of the UTP cable. The standard requires designs to meet the return loss specification with reference impedance in the range of 85Ω - 115Ω to ensure operation over wide range of installed UTP cables. Measurement is specified to be between 1MHz-80MHz for Fast Ethernet (FE) interfaces and 1MHz-100MHz for Gigabit Ethernet (GbE) interfaces.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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October 2017 |
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Revision 04a |
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AN094 |
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1.1 MB |
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