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Analyzing Wifi Noise: Changing the Wireless Channel on an Asus Router

Analyzing Wifi Noise: Changing the Wireless Channel on an Asus Router


Guide for analyzing wifi radio frequency noise,
and changing the wifi channel on an Asus router. You’ll need to download and install a copy
of insider for this. That’s I N SSID E R, There’s a link available below in the description
We already have insider installed here, so let’s open it up…
Your computer will have to have a wireless adapter to use this program; it uses your
wireless adapter to do continual spectrum analysis.
Click on NETWORKS at the top, and in here we can see the different networks that my
computer can see. My wifi network is the one called ‘My Network’ here, and you can
see some not very original names in the other networks, with three called MCSNet.
The little chart at the bottom left is the best view of the spectrum. There are three
non-overlapping channel options in the wifi spectrum, which is channel 1, channel 6, and
channel 11, so we only want to pick from one of these. In this spectrum, we can see a couple
of evil jerks, one is sitting on channel 9 and another is spanning all the way from channel
4 up, which is like double parking, but we don’t need to give them a ticket because
doing this is its own punishment with a noisy spectrum.
The left hand side of the chart shows the signal strength, where the -45 signals are
much stronger than the -70 signals. Clicking on the ‘My Network’ at the top
highlights our network on the bottom chart, and we can see it’s on channel 1 right now,
which is also being used by the very strong MCSNet network. From the chart at the bottom,
the noise on channel 11 at the top end of the spectrum is a bit less, so that’s where
we want to move our wifi network to. We’ll need to login to our router to adjust
the channel, so we open our web browser, which is firefox, and in the address bar at the
top, input the default address for the Asus router, 192.168.1.1 and hit enter. It will
ask for the username and password to login, which by default on an Asus router is admin
and admin. We are now logged into the router. We want
to change the wifi channel, so let’s go into the wireless settings by clicking on
‘Wireless’ toward the bottom left. The default setting is to auto select the
channel, so we’ll need to adjust this. On this page, you can see where the double
parkers come from, the 40 MHz channel takes up twice the amount of frequencies, the larger
channel is a marketing trick by the router manufacturers to promise faster rates, but
with this, your wifi will be more sensitive to interference issues, and may also have
higher latency—it’s just generally a bad idea, and we are going to make sure we are
on 20 MHz here. The frequency channel setting is in the ‘control
channel’ option. Let’s pick our channel 11 from this list. Now we hit apply to activate
and save the setting, and the router will give us a progress percentage while making
the change. Now that that is done, we’ll go back to
insider to see how it looks now. ‘My network’ is listed twice, there’s
the old one from before the channel change, and the new one where the green signal line
is just starting to draw. Our network is a few decibels above other noise now, so we
should expect the best performance here, but this is wifi, where performance is expected
to be slower, so if we really want good performance, we’ll make sure we get our computer connected
with a cable to our router for the best throughput and reliability.
That’s it; watch out for those double parkers.

13 comments on “Analyzing Wifi Noise: Changing the Wireless Channel on an Asus Router

  1. This really helped me fix some interference problems I was having with my neighbors on 2.4G.

    After I switched to a different channel and changed my mhz I haven't had any problems at all. My phone was bugging out during that period too switching from 4G to the house's wifi every 20 minutes or so and interrupting youtube videos while they were already playing, so it was getting to be really noticeable. I think we had a new family move in and there were just so many signals on the same channel bouncing around locally.

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