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Confused about router settings on TP-Link TL-WDR4300 N750 on DD-WRT - Page 2

post #11 of 18
Thread Starter 
OK - so I'm playing with the channels and the wireless settgins - I maanged to get mum's PC connected to 5GHZ with 450mbps using the higher-iter channels. Thoughts? I read up on it - and seems like the higher channels can output more (which it seems signal wise they do by 1 bar) however can be prone to interference with certain "mega phones"?

Also on the 2.4ghz front - definitely agree that 20mhz is better to use.
I noted a lot more problems connecting via 40mhz and the band...was HUGE - if I was living in a remote place, I would choose 40mhz, but as it is populated, 20mhz works better

Source:
http://tidbits.com/article/10849




EDIT:
Got a question about TX power - the default on mine is set at 20.
I set it to 28 - seems like a I get a better speed at range. - my PC now also has 5/5 bars.
Any ideas on this?
I read some routers that are on TX 70 - I don't know what to set it at

EDIT2:
Furthermore, channel wise - if I go to a higher channel on the 5GHZ range - is that OK?
I've done quite a bit of reading on it, but still unsure
Edited by Totally Dubbed - 7/27/13 at 7:02am
post #12 of 18
Thread Starter 
Why wasn't this ever mentioned or realised by anyone...
Been playing a lot with the router settings

Channel width:
40mhz

When on 40mhz the speed for 2.4ghz goes to 300mbps
When on 20mhz the speed for 2.4 ghz goes to 144.44mbps

When on 40mhz the speed for 5.2ghz goes to 450mbps
When on 20mhz the speed for 5.2ghz goes to 216mbps

On 40mhz @2.4ghz I think I get a bit of interference with what is around me.
That said, I need to do more tests.

Seeing as no one is on 5ghz in my area I'll leave 5ghz @ 40mhz.
2.4ghz is the one I have to play around with.

Here are the variables:
Channel selection:
Now for 2.4ghz I would just leave it on 11 with 20mhz, but with 40mhz is where the question starts getting asked. I need to figure out the best one.

The TX POWER:
The higher the TX power - the higher the transmitting power (as suggested in the name) - which means greater range.
It seems as if I can go till 28db, rather than on the stock 20db. I have, however realised some problems on 5ghz whilst on higher tx power
I need to experiment and figure out what I can get to.

Antenna gain:
Mine is set to 0 - so I'm not sure if this is right or wrong - again I need to experiment.


Finally the wireless cards in our PCs - I know the edimax was able to "change TX POWER" - now I understand what that is - maybe I can do the same for the tp link via the utility.


Would love clarifications on each point though
Edited by Totally Dubbed - 7/27/13 at 8:05am
post #13 of 18
Quote:
Originally Posted by Totally Dubbed View Post

Why wasn't this ever mentioned or realised by anyone...
Been playing a lot with the router settings

Channel width:
40mhz

When on 40mhz the speed for 2.4ghz goes to 300mbps
When on 20mhz the speed for 2.4 ghz goes to 144.44mbps

When on 40mhz the speed for 5.2ghz goes to 450mbps
When on 20mhz the speed for 5.2ghz goes to 216mbps

On 40mhz @2.4ghz I think I get a bit of interference with what is around me.
That said, I need to do more tests.

Seeing as no one is on 5ghz in my area I'll leave 5ghz @ 40mhz.
2.4ghz is the one I have to play around with.

That all sounds about right. Generally, the 5.2GHz band is pretty uncrowded. Certain channels will work better, and that's largely a function of the material in your house (i.e. what material interferes at what frequency) and the distances you are trying to transmit.
Quote:
Here are the variables:
Channel selection:
Now for 2.4ghz I would just leave it on 11 with 20mhz, but with 40mhz is where the question starts getting asked. I need to figure out the best one.

As you noted above, 40MHz gives you more streams (i.e. faster speeds), but is prone to more interference (which means actual throughput might be lower).
Quote:
The TX POWER:
The higher the TX power - the higher the transmitting power (as suggested in the name) - which means greater range.
It seems as if I can go till 28db, rather than on the stock 20db. I have, however realised some problems on 5ghz whilst on higher tx power
I need to experiment and figure out what I can get to.

Transmit power is tricky. Usually increasing transmit power helps, but it will only help up to a point. If you set it too high, you may not get reliable connections when you are close to the access point. Also, higher transmit power can make your router overheat, which can shorten its life. My Linksys E4200 is set to 71mW: I found that to be the sweat spot. However, because we are talking about two completely different routers, you can't necessarily compare them. I just wanted to share that data point with you.
Quote:
Antenna gain:
Mine is set to 0 - so I'm not sure if this is right or wrong - again I need to experiment.

You really only should adjust this if you install higher gain antennas. I don't know exactly what it does, but that's what I understand that setting to be for.
Quote:
Finally the wireless cards in our PCs - I know the edimax was able to "change TX POWER" - now I understand what that is - maybe I can do the same for the tp link via the utility.

I don't have that much experience with different computer devices. Most of my experience is using DDWRT to setup bridged setups, and I've found that once I optimize the bridge configs, then most of my wireless clients don't have problems.
post #14 of 18
Thread Starter 
Excellent reply thanks!
I actually just posted a new thread regarding wi-fi networks.
I think I might have found a sweetspot.
5GHZ is for me, and my PC only - but 2.4ghz is for the rest of the apartment, and especially mum - and I want her connection to be steady - which it doesn't seem to be.
I've gone to channel 13 + 40mhz (13+9) - and it SEEMS like I'm getting the best connection via that via my PC on 2.4ghz.
I'll do some tests on her PC tomorrow, as she was complaining about Skype users saying people couldn't hear her, or the fact that her voice was cutting up - looking at the wi-fi analyser, it makes complete sense of what she said.
post #15 of 18
Thread Starter 
OK PLayed aroudn with it a lot tonight.
Funny thing:
When at my mum's PC - as it is scanning via her card, the best channel was channel 11 - and @ 40mhz.
When I went for 20mhz, the link score dropped drastically, and so did the signal (for some reason).

Anyway, after a long periods of testing on her PC on 2.4ghz:
Channel 11
Channel width: 40mhz
TX power & Antenna gain on default - 20 and 0 respectively (I left these settings the same for 5ghz)

Link speed 300mbps - signal quality 3-4bars - no interference (at least not much) - I'll get her high gain 2.4ghz 9db antennas (I got 7db ones lying around, so I'll test there first)

For my PC 5ghz:
Channel 36
Width: 40mhz
Upper - thus 36 +40

If I went beyond a 100 - it was cutting off every now and then and sometimes unable to connect.


Internet speeds seem to be fluctuating, but in all honest, with these speed tests, I think it has to do with the provider.


As for wireless security - changed them both to WPA2 Personal (NOT WPA2 Personal mixed, as it used to be)
And I changed it to AES ONLY (from TKIP+AES)

Note2, S3 and laptop all connect fine - and there are no other devices in here apart from the two PCs, so no need for any other type of encryption.

Note:
The Link score of 2.4ghz on my mum's PC is BETTER than mine, even though it is 10m further away than my PC is to the router. I guess that's channels for you.
post #16 of 18
If her speeds are better than yours, you might want to try even lowering the TX power for the 5.2GHz signal.

I'm curious where you are getting the metric "link score". Generally, stuff like that is far too arbitrary of a metric to actually be useful in comparing one device to another. Sure, it's useful on one device to compare one setting to the next, but not necessarily between your and your mom's computers.
post #17 of 18
Thread Starter 
Quote:
Originally Posted by Nick2253 View Post

If her speeds are better than yours, you might want to try even lowering the TX power for the 5.2GHz signal.

I'm curious where you are getting the metric "link score". Generally, stuff like that is far too arbitrary of a metric to actually be useful in comparing one device to another. Sure, it's useful on one device to compare one setting to the next, but not necessarily between your and your mom's computers.

very good point.
As for lowering the TX power - I did that, and nothing really changed.
I'll try lower tomorrow as she's now fast asleep smile.gif
post #18 of 18
Thread Starter 
Added my old antenna's and extender:
http://www.amazon.co.uk/gp/product/B001B4RDXQ/ref=wms_ohs_product?ie=UTF8&psc=1
http://www.amazon.co.uk/gp/product/B001H0GGZ0/ref=wms_ohs_product?ie=UTF8&psc=1

Bang: full bars - 20 mbps speeds via speedtest.net reached (from 5mbps).

I'm going to buy my mum 3 of these:
http://www.amazon.co.uk/TP-Link-TL-ANT2408CL-2-4GHz-Omni-Directional-Antenna/dp/B002VYP5QW/ref=sr_1_1?ie=UTF8&qid=1375221740&sr=8-1&keywords=tp+link+antenna

The problem with all of the above is that they are ONLY 2.4GHZ capable and NOT 5GHZ - wish I could find 5GHZ indoor antenna's in the UK frown.gif


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