User's Manual Part 2

Tech-X Flex
®
(NG2) Tech-X Flex User Guide - Firmware v06.50
7-3
Intro
Overview
Wi-Fi
Ethernet
System
IP/Video
MoCA
RF
Specs
Issue Troubleshooting suggestions
One TV (using
IPTV) in the home
has a poor and/or
intermittent
picture, or no
picture at all
The primary use of the unit is to confirm or rule out the STB as the cause.
Troubleshooting might proceed as follows:
1. Disconnect the cable from the STB, connect the unit directly to the STB, and
attempt a single-ended MoCA synchronization on the LAN channel. This action
effectively creates a small, independent MoCA network between the unit and
the STB. The STB can be considered suspect if:
• If the unit cannot synchronize at all
• MoCA stats show poor bandwidth between the unit and STB, indicating
partially functional but defective MoCA hardware within the STB
2. If the previous step reveals no problems, connect the unit to the cable that
originally fed the STB, then attempt a single-ended synchronization towards the
home network (see Figure 7-4 on page 7-7). If synchronization is not possible
or bandwidth between the unit and router is poor, consider a physical cause on
the cable feeding the STB (see Common coaxial cable problems that affect
MoCA on page 7-37).
3. If the previous step reveals no problems, place the unit in-line with the STB and
perform a passive video quality measurement while watching the poor video on
the TV (see Figure 7-12 on page 7-19). If video quality measures poor, the
problem is likely with the IPTV stream source upstream. If video quality
measures OK, the STB may be suspect.
All IP devices
exhibit poor
performance
If the entire network is slow, the router, provider network terminal (NT), and/or
associated coaxial cable may be suspect. A troubleshooting strategy may start
with disconnecting the router and joining the LAN network at that point to check
the bandwidth between nodes (see Figure 7-6 on page 7-9). If the WAN is also on
the cable, it may be useful to join that network as well to check the bandwidth
between the router and the NT. In all of these cases, the bandwidth reporting may
help isolate problems with certain legs of the cable and perhaps splitter
configurations that are causing degradation.
Preliminary issue - Limited distribution only!