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陰特兒（Intel）1000Base-T 設計指導書（Design Guide）：+ F: n( I- f: ^8 \, j+ A1 ^3 D( `0 v4 J
& U" |* ], h+ e( \8 W6 l: X' Z" GMagnetics modules for 1000 BASE-T Ethernet are similar to those designed solely for 10/100 Mbps, except that there are four differential signal pairs instead of two. Use the following guidelines to verify specific electrical parameters:2 B' R0 X2 i$ ?% T/ a6 D- j
- Verify that the rated return loss is 19 dB or greater from 2 MHz through 30 MHz for 100BASE-TX.
- Verify that the rated return loss is 12 dB or greater at 80 MHz for 100 BASE-TX (the
- specification requires greater than or equal to 10 dB). Verify that the rated return loss is 10 dB or greater at 100 MHz for 1000 BASE-TX (the specification requires greater than or equal to 8 dB).
- Verify that the insertion loss is less than 1.0 dB at 100 kHz through 80 MHz for 100 BASETX.
- Verify that the insertion loss is less than 1.4 dB at 100 kHz through 100 MHz for 1000 BASET.
- Verify at least 30 dB of crosstalk isolation between adjacent channels (through 150 MHz).
- Verify high voltage isolation to 15000 Vrms
- Transmitter OCL should be greater than or equal to 350 μH with 8 mA DC bias.7 V/ I: p: g$ x+ Y
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发表于 2017-8-7 13:48
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支持！
反对！
发表于 2017-8-18 17:29
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