IQH3A IQ 3U Modular Enclosure
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Installation
Issue 2 Rev 2
Page 21
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2014 Snell Limited
3.6.4 RollNet
The BNC connector enables the unit to be
connected to the RollCall network
communications system.
The RollCall system should be connected
using a 75 Ohm “T” or “Y” piece, in a similar
manner to an “Ethernet” system. Both
extremities of the system must be terminated
in 75 Ohms.
Note:
The coaxial link is bi-directional and therefore must not be passed through signal switching
networks. Also, to allow hum and noise cancellation, the screen of the coaxial connection
must not be earthed.