Netgear EN516 EN516 Installation Guide - Page 37
Coaxial, Cable, AUI Cable
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Installation Guide for the Model EN516 Ethernet Hub 50 Ω Coaxial Cable The 50 Ω coaxial cable, the BNC T-connector, and the 50 Ω terminator, allow a user to construct a 10BASE-2 network. Table B-2 lists the specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable. Table B-2. Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U coaxial cable Characteristic impedance 50 +/-2 Ω Attenuation (185 m cable)
Installation Guide for the Model EN516 Ethernet Hub
Cabling Specifications
B-3
50
Ω
Coaxial
Cable
The 50
Ω
coaxial cable, the BNC T-connector, and the 50
Ω
terminator, allow a user to construct a
10BASE-2 network. Table B-2 lists the specifications of 10BASE2 (ThinNet) RG 58 A/U or RG
58 C/U coaxial cable.
The Ethernet specifications limit segments to 30 stations, specify a minimum of 0.5 m between
any two stations, and limit segments to 600 feet (185 m) in length.
AUI Cable
The AUI cable connects the AUI port on the Model EN516 hub to a transceiver. The Ethernet
specifications limit the cable length to 164 ft (50 m). Table B-3 lists the specifications of AUI
cable.
Table B-2.
Specifications of 10BASE2 (ThinNet) RG 58 A/U or RG 58 C/U
coaxial cable
Characteristic
impedance
Attenuation
(185 m cable)
Transfer
impedance
DC loop
resistance
50 +/-2
Ω
<8.5 db @ 10 MHz
<6.0 db @ 5 MHz
20 m
Ω
@ 1 MHz
100 m
Ω
@ 10 MHz
500 m
Ω
@ 100 MHz
50 m
Ω
/meter
Table B-3.
Specifications of AUI cable
Electrical characteristic
AUI cable specifications
Nominal dc resistance
<1.75
Ω
per conductor
Pair-to-pair balanced crosstalk
Minimum 40 dB attenuation from 5 MHz to 10 MHz
Differential characteristic impedance
78 +/- 5
Ω
at 10 MHz
<3
Ω
difference between pairs
Transfer impedance
<10 m
Ω
@ 500 KHz
<3 m
Ω
@ 2 MHz
<3 m
Ω
@ 10 MHz
<30 m
Ω
@ 100 MHz
Attenuation
<3 dB from 5 MHz to 10 MHz
Timing jitter
<1.0 ns introduced by the cable system
Total signal delay
<257 ns