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EtherHub 1500 System User’s Guide
A-2 Product Specifications
Specifications for FlexBus 1500 Cable
The FlexBus 1500 is a category 5 STP cable used to connect
stacked EH1500+ or compatible hubs. It supports segment
configuration setup and management functions for EH1500+
or compatible hubs. Its specifications are listed below:
Cable performance level high-performance data grade
conductor 8-wire, 4-pair,
24 AWG stranded bare copper
insulation polyolefin
shield overall aluminum foil
jacket PVC
operating frequency 100 MHz Max
impedance 102 ± 15% Ohms
attenuation 5.5 dB/1,000 ft
Plug 8-wire shielded modular plug for stranded twisted-pair cable
No special tools are required to install the FlexBus 1500 cable.
These cables are terminated on the plugs in advance.
Tables A-1 and A-2 list the attenuation and near-end crosstalk
(NEXT) loss v.s. reference frequency. Attenuation is derived
from swept frequency signal level measurements at the output
of 305m (1000 ft) of cable. The maximum attenuation for any
pair shall be less than the values given in Table A-1 for the
frequency range of 0.772 MHz to the highest referenced
frequency.
Near-end crosstalk (NEXT) is derived from swept frequency
measurements using a network analyzer or an s-parameter test
set. A balanced signal is applied to a pair that causes disturbance
while the crosstalk signal is measured at the output port of the
pair being disturbed at the near end of the cable.