WNDR3800 5ghz TX power confusion

Report wireless and/or network connectivity problems in this forum.

Moderator: Moderators

Post Reply
robnitro
Posts: 84
Joined: Sat Feb 26, 2011 4:50 pm

WNDR3800 5ghz TX power confusion

Post by robnitro »

This issue occured with the last firmware too 1.10, but now with 1.11.

US regdomain
5ghz channels 36-48 say 20 max, but only do 17?!?!
channels 149-165 say 24 max and can do 24.
Interface showing these values. I also manually specified 18 19 20 and the lower 5g channels stay at 17 dbm.

What's odd is if I set iw reg set DE, 5ghz ch 44 will do 20 db (limit 20), but 2.4 ghz can only do 17 despite that limit being 20. Buggy?!

iw reg get for the 5ghz interface:
What is AUTO-BW???
phy#1
country US: DFS-FCC
(2402 - 2472 @ 40), (N/A, 30), (N/A)
(5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
(5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW
(5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
(5735 - 5835 @ 80), (N/A, 30), (N/A)
(57240 - 63720 @ 2160), (N/A, 40), (N/A)



iw reg get:
* 5180 MHz [36] (20.0 dBm)
* 5200 MHz [40] (20.0 dBm)
* 5220 MHz [44] (20.0 dBm)
* 5240 MHz [48] (20.0 dBm)

* 5745 MHz [149] (24.0 dBm)
* 5765 MHz [153] (24.0 dBm)
* 5785 MHz [157] (24.0 dBm)
* 5805 MHz [161] (24.0 dBm)
* 5825 MHz [165] (24.0 dBm)
iwinfo with channel 149:
Mode: Master Channel: 149 (5.745 GHz)
Tx-Power: 24 dBm Link Quality: 37/70

iwinfo with channel 44 set:
Mode: Master Channel: 44 (5.220 GHz)
Tx-Power: 17 dBm Link Quality: unknown/70

Lantis
Moderator
Posts: 5382
Joined: Mon Jan 05, 2015 5:33 am
Location: Australia

Re: WNDR3800 5ghz TX power confusion

Post by Lantis »

The limit includes the gain of the antenna so you need to factor that in.
2.4ghz looks right, not sure about 5.

We follow the same rules as OpenWrt (no modification) so you might check there instead if you think there is a true issue.
http://lantisproject.com/downloads/gargoyle_ispyisail.php for the latest releases
Please be respectful when posting. I do this in my free time on a volunteer basis.

robnitro
Posts: 84
Joined: Sat Feb 26, 2011 4:50 pm

Re: WNDR3800 5ghz TX power confusion

Post by robnitro »

Thanks,
2.4 is working great.

Including gain of antenna makes sense but the DE and US regdomain have the same 20db limit. Very odd...

Post Reply