Viavi OneExpert DSL ONX-580 User Manual page 278

Chapter 16 Appendix
WiFi Advisor
The following table provides some typical problems and resolutions.
Problem
Signal strength and coverage
problems
– Attenuation with distance and
materials in the home
– 5GHz has shorter reach than
2.4GHz
802.11 interference sources
– Co-channel interference (forces
your AP to share the channel)
– Adjacent channel interference
(looks like noise to your AP)
Non 802.11 Interference sources
– Microwaves, AV transmitters,
cordless phones, baby monitors,
etc.
High channel utilization
– The more APs in the channel, the
higher potential utilization
– High utilization, low noise = high
– 802.11 traffic on the channel
– High utilization, high noise =
potential non-802.11 interferer
802.11 a/b/g devices on your network
– Slow a/b/g PHY rates occupy the
channel longer than modern PHY
rates for the same amount of
information transfer.
– Old security types (WEP/WEPA1)
limit connection to lower 802.11
rates
278
Resolution
Look for -35 to -70 dBm RSSI and >20 dB SNR.
Look for < 4 co-channel interferers and < 3
adjacent channel.
Observe spectrum for interferers in the channel
of interest.
Look for <35% utilization + low noise.
Detect and advise replacement of old gear.
OneExpert DSL User's Guide
22052280, Rev. 015 April 2019