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Equation 10 · Part 1 · How AI Datacenter Interconnects Actually Work

Symbol R_line

RlineR_{\mathrm{line}}
RlineR_{\mathrm{line}}

What this part means

RlR_line is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

RlR_line is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

Modern high-rate Ethernet lanes use PAM4 modulation: instead of encoding one bit per symbol as ordinary NRZ signaling does, PAM4 uses four distinct voltage levels to encode two bits per symbol, so a lane’s bit rate runs at twice its baud (symbol) rate rather than matching it one for one. Writing RbaudR_{\mathrm{baud}} for the symbol rate and RlineR_{\mathrm{line}} for the resulting line rate,

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the article section

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