Check The Home Coaxial Network Topology; Figure 7 - Set-Top Box Mac Address - Arris VMS1100 Installation And Operation Manual

Installation

Check the Home Coaxial Network Topology

This procedure assumes you are networking at least one VMS1100 and one or more IP Client STBs. Before
you install the VMS1100, do the following:
1. Create a table listing for each of the following:
2. Every room where you plan to install a set top.
3. The signal levels you measured at the RF cable outlets.
4. HFC MAC Address located on the label on the bottom of the set-top used in that room.
5. Optionally, you can include information such as the set top type, serial numbers, and anything else you or
the service provider considers useful.
6. Use your TV signal tester at the coaxial outlet where you will connect any MoCA set-top box and router.
Verify that the signal level of the highest downstream digital channel frequency is between -10 and 10
dBmV. Record your readings in a table similar to Table 4-1. A signal level of +0 dBmV is ideal.
Note: If the signal level is less than -10 dBmV, you must correct the problem before installing the set-top
box.
7. If possible, determine whether there are one or more in-line coaxial RF amplifiers. If possible, move the
existing amplifier to a position near the point of entry. See
8. If possible, determine how many splitters, and what kind, are in use. An older splitter, such as an old
eight-way splitter, may have unacceptably high throughput loss. Replace any splitter cascades having a
loss of 18 dB or more.
9. If the signal level at one or more coaxial outputs remains unacceptably low, the power loss may be caused
by long coaxial cable runs using cable of insufficient quality. For example, a 330 ft (100 m) cable can
reduce the power by 20 to 27 dB, depending on the cable quality. This results in a very low power level at
the outlet of about -5 to -10 dBmV or lower. This loss, combined with loss from a splitter, causes marginal
MoCA network performance.
10. If you make any changes to the network, repeat steps 1 and 2.
Be sure all connections are properly secured. Poor F-connector fittings or poor
grounding can cause ingress.
VMS1100 Hybrid QAM/IP Video Media Server • Installation and Operation Manual
365-095-25654 x.1
Figure 7 – Set-Top Box MAC Address
This document is uncontrolled pending incorporation in an ARRIS CMS
Troubleshooting for more information.
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