TX50E broken on 5GHz channel 100 and above

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TX50E broken on 5GHz channel 100 and above

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
TX50E broken on 5GHz channel 100 and above
TX50E broken on 5GHz channel 100 and above
2021-08-16 12:55:17 - last edited 2021-08-16 16:01:50
Model: Archer TX50E  
Hardware Version: V1
Firmware Version:

The Archer TX50E(UN) seems to have a serious issue with 5GHz channel 100 and above using ac and also n (I only have an ac capable router so cannot test ax). It can connect but either has poor speeds or completely loses all internet access. I am not sure if this is some bug to do with DFS channels (my region is New Zealand where only channels 68-96 are not allowed), my previous tp-link TL-WDN4800 adapter had no problem with channels 100 and above on 5Ghz. Channels below 100 (36-64) seem to work mostly fine although I have noticed some occasional odd slowdowns. I have tried installing the latest intel AX200 windows 10 64-bit driver version 22.70.0 (https://www.intel.com/content/www/us/en/download/19351/windows-10-wi-fi-drivers-for-intel-wireless-adapters.html) but it has not helped. Anyone else experiencing this?

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#1
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8 Reply
Re:TX50E broken on 5GHz channel 100 and above
2021-08-17 01:27:08 - last edited 2021-08-17 01:34:08

@r1ch4rdNZ  Hello, 

It is recommended to scan for 5Ghz WiFi channel using WiFi analyzer app or software and select a better 5Ghz channel. T 

Band 4 channels on the main router (Channel 149- 165) are more recommended as DFS channels are also used for radar and could be unstable 

Here is a brief introduction on DFS channel : 

https://www.tp-link.com/support/faq/763/

 

  • Turn off Wireless Advanced settings on router like Band Steering, Roaming Smart Connect Whole home Wi-Fi etc. 
  • For stability, you could try lower 5Ghz channel width 40Mhz
  • At the same location of TX50E, please connect to the same 5Ghz WiFi and test performance, does other device perform better at the same location?  

 

If the above does not work, may I know the model of router, and a photo of the 5Ghz wifi settings on router, and also the motherboard information of your computer? 

 https://www.tp-link.com/support/faq/2722/

From your description Channel 36.40.44.48 works okay but have random slow down, is this the reason that you prefer a higher channel ?

 

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Re:TX50E broken on 5GHz channel 100 and above
2021-08-18 20:02:07 - last edited 2021-08-18 23:25:57

@Solla-topee 

I got the following reply from Tp-Link Technical Support: "T5E does not support 5G channels over 100 when the chip is manufactured, so it will lead to the situation you mentioned. I suggest you change the channel to a channel that you can use if you don't have special needs."

 

If they mean the Intel AX200 chipset on the TX50E cannot use channels like 100 and above due to DFS this https://deviwiki.com/wiki/Intel_Wi-Fi_6_AX200_(AX200NGW) seems to suggest otherwise under Flags "DFS (slave)". Even my ancient TL-WDN4800 seems to have DFS support (http://en.techinfodepot.shoutwiki.com/wiki/TP-LINK_TL-WDN4800) and ran perfectly fine on channel 100. It is my understanding that all Wifi 6 products that support 160Mhz channel width require DFS support in order to work.

 

I prefer the higher channels like 100 because they seem to provide better signal penetration through walls.

 

I think a proper explanation of why the TX50E cannot use channel 100 and above is needed as it seems unlikely that the onboard Intel AX200 chipset which is designed for ax 160Mhz channel widths that require as many available channel blocks as possible would have such a limitation.

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#3
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Re:TX50E broken on 5GHz channel 100 and above
2021-08-19 05:58:09

@r1ch4rdNZ  Hello, 

TX50E(UN) should support DFS channels or you could not see the WiFi signal when router is on the DFS channels.

Did you try to use WiFi analyzer WiFi to scan for 5Ghz Wifi and also try Band4 channel 149-165. As far as I could tell changing a different channel may help aviold the some wifi interferences but does not help with a better Wi-Fi range. 

You may try a higher transmit power on the router for the better signal penetration or locate computer or router closer to each other. 

If the above does not help, please help confirm the details  in my last reply so we could look in to the issue further, and also let us know what channels you've tried, thank you. 

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Re:TX50E broken on 5GHz channel 100 and above
2021-08-20 03:41:00 - last edited 2021-08-20 03:50:59

@Solla-topee 

Unfortunately I am unable to try any channels above 128 as for some reason my router doesn't list them. I am using an ISP (Spark) branded Huawei HG695b ac router with 20/40/80MHz channel widths (https://www.spark.co.nz/help/internet/broadband-help/huawei-hg659b-support).

 

You can see the router channel list below for an 80MHz channel width:

 

 

As you can see transmit power is already at 100%. I do not believe this is an issue with interference as my previous TP-Link wireless N adapter (TL-WDN4800) had no trouble with channel 100 to 128 in the same computer although it uses an Atheros AR9380 chipset and not an Intel AX200. It seems very likely that it is related to DFS as in this region (New Zealand) the DFS band starts from channel 100 as you can see below (taken from the official site https://www.rsm.govt.nz/business-individuals/guidance-for-wisps/).

 

 

Although like you say if DFS was unsupported on the TX50E I should not be even able to see my 5GHz wifi on channel 100 which I am able to do and even connect to it although it quickly loses internet and local network access. This makes me instead think it is some issue between the router and adapter relating to the DFS implementation. This could also explain why people have reported issues with the TX50E and 160MHz channel widths (@Kaptain-K https://community.tp-link.com/en/home/forum/topic/261324) as I think in certain countries like the US it is not possible to have a single 160MHz block without hitting DFS channels (unless the router supports the split 80+80 system).

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#6
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Re:TX50E broken on 5GHz channel 100 and above
2021-08-20 09:22:24

@r1ch4rdNZ  Hello,

Thanks so much for sharing all the detailed info, this issue you are experiencing sounds unusual. To address the issue and try to fix it, we would like to escalate your case to seniors to look into this further via email. Please check your mailbox later, and let us know if the issue is resolved. Thank you!

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#7
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Re:TX50E broken on 5GHz channel 100 and above
2021-08-20 10:08:53

@r1ch4rdNZ 

 

Hello Everyone,

I currently have a Netgear r6400, which has served me well but seems to have tremendous issues with both of the windows 10 laptops in my household with the 5ghz band. When I'm using either windows 10 laptop(One is an Asus Zenbook, the other is a Dell XPS 13), my 5ghz wifi network seems to have a huge amount of problems.

When I turn the laptop on, it just wont find the 5 ghz network, but will always see my 2.4 ghz network right away. When I check the network list, I see all the other 5 ghz networks that are located in my building but it can take sometimes 3 minutes before my routers 5ghz network will show up. Now when I do finally connect to it, It will periodically disconnect and cant find the network again. This happens on both of the laptops from completely different OEMS. The kicker is that every other device in my house (Apple Tv 4k, Amazon Echo, 2 Iphones, Chromecast, and an Ipad) never have a single issue holding the connection to my 5ghz wifi and it works flawlessly.

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#8
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Re:TX50E broken on 5GHz channel 100 and above
2021-08-20 10:48:36

@Haucks 

I guess you could try setting the 5Ghz channel manually on the router to 36 in case it was something to do with DFS channels. I know a router that is on certain DFS channels can delay bringing up the 5Ghz wifi for minutes after reboot as it has to scan for active radar etc but I don't think a wifi adapter would need to do so. If the laptops have completely different wifi adapters it seems like the router configuration might be upsetting windows somehow. I have had some wifi issues with windows 10 over the years, not so much with being slow to connect but rather randomly forgetting to connect automatically. Other things you could try are a full network reset (https://www.howtogeek.com/265870/how-to-reset-your-entire-network-in-windows-10-and-start-from-scratch/) or you could set the preferred band to 5Ghz (https://www.tenforums.com/tutorials/151786-how-change-preferred-band-wireless-network-adapter-windows.html).

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#9
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Re:TX50E broken on 5GHz channel 100 and above
2021-08-20 11:07:13

@Solla-topee Thanks. It isn't a huge issue as I can use the lower channels it just seems very strange.

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#10
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