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CM 4000 / AccuSwitch
G−3CM 4000 Installation and Operating Manual
Installing 10Base2 LAN Cables
In AccuSwitch applications, the CM 4000 can be on the same Jupiter LAN as VM/SI 3000 units and Saturn processors. The
10Base2 LAN used to connect VM/SI 3000 and Saturn units is the Ethernet thin cable type, also referred to as “thin net.” LAN
cabling guidelines are shown on pages G−4 and G−5. Please note the following additional restrictions:
• 50−ohm, RG−58 type coaxial cable and BNC connectors must be used for the LAN cabling. 75−ohm RG−59
cable cannot be used. Furthermore, cable crimpers designed for RG−59 cable may not do a good job with the
smaller RG−58 cable. Factory−made cable is available (see below).
• A thin cable LAN cannot be used outdoors between unconnected buildings. An Ethernet thick−cable segment,
connected to thin cable segments with repeaters, would be required for this purpose.
• Local building codes must be checked before LAN installation, especially with regard to grounding require-
ments and installation of cable in air return plenums. It is recommended that the LAN not be grounded; but if
grounding is required by local code it should be grounded on one end only. Generally, the national electrical
codes restrict the use of LAN cabling in air ducts and plenums. If PVC−jacketed cable is permitted in such
spaces it typically must be run in metal conduit; FEP−jacketed cable is typically permitted without conduit.
• Due to possible speed loss, use of non−Jupiter equipment on the Jupiter LAN is not recommended and will not
be supported.
The following RG−58 thin net cables, with installed BNC connectors, are available from Grass Valley:
1 meter (3.3 ft)
2 meters (6.6 ft)
4 meters (13.1 ft)
8 meters (26.2 ft)
16 meters (52.5 ft)
32 meters (105 ft)
For ordering information, see page 1−22.
The jacket material for these cables is fluoropolymer (FEP).
A termination kit, consisting of a pair of 50−ohm terminators (without ground wire connections) is also available. The part
number is 44−039807−001.