Joined: 03 Jan 2010 Posts: 7568 Location: YWG, Canada
Posted: Wed Aug 04, 2010 23:05 Post subject:
Kozaki666 wrote:
Build 14684.
Working as AP
Selected: 20dbi, 0 dbi antenna gain, rd USA, outdoor band, autochannel.
Gui reports 19 dbi
iwlist reports 19 dbi
:
Pd: When I eat octopus usually do not ask about football
To find absolute max do the following:
1. Reg domain Canada or USA, I recommend Canada. Do NOT use channel 11 when in 40 MHz mode!
2. Set TX power to 36dBm.
3. Set network mode to NG-Mixed
4. Channel width to 40 MHz.
5. Note TX power through GUI and telnet.
6. Repeat steps 3-5 replacing 40 MHz with 20 MHz.
7. Repeat steps 3-5 again this time replacing NG-Mixed with G-Only along with changing 40 MHz to 20 MHz.
Make sure antenna chains are set correctly or this will have a huge impact on TX power and performance, going by FCC ID documents it seems like 1+2+3 is the correct setting but do test them. The documents also say max TX power should be 24dBm with the correct settings. _________________ LATEST FIRMWARE(S)
BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
Make sure antenna chains are set correctly or this will have a huge impact on TX power and performance, going by FCC ID documents it seems like 1+2+3 is the correct setting but do test them. The documents also say max TX power should be 24dBm with the correct settings.
Using TX antenna chains setting as 1+2+3, actual tx power increases to 21dbm (gui/iwlist) with any of the settings you suggested.
Joined: 03 Jan 2010 Posts: 7568 Location: YWG, Canada
Posted: Thu Aug 05, 2010 1:55 Post subject:
Kozaki666 wrote:
tatsuya46 wrote:
Make sure antenna chains are set correctly or this will have a huge impact on TX power and performance, going by FCC ID documents it seems like 1+2+3 is the correct setting but do test them. The documents also say max TX power should be 24dBm with the correct settings.
Using TX antenna chains setting as 1+2+3, actual tx power increases to 21dbm (gui/iwlist) with any of the settings you suggested.
I´ll check whether this increase in tx power is real or "just numbers".
99.9% of the time when iwlist and GUI agree its actually working. If you have a iPhone running sbsettings or any smartphone capable of displaying dBm strength of wifi they make excellent dBm measurers. _________________ LATEST FIRMWARE(S)
BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
ok there seem to be some problems with the driver. i only use chain 1 cause the unit is in client mode but the gui reports me 14dbm and the cli 20dbm (which i dont belive in).
and your cli showing with a max of 1200mw is surely wrong _________________ Forum Guidelines...How to get help
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Joined: 03 Jan 2010 Posts: 7568 Location: YWG, Canada
Posted: Thu Aug 05, 2010 9:27 Post subject:
Sash wrote:
ok there seem to be some problems with the driver. i only use chain 1 cause the unit is in client mode but the gui reports me 14dbm and the cli 20dbm (which i dont belive in).
and your cli showing with a max of 1200mw is surely wrong
Majority of routers have that problem, DIR-615 C1 being the worst I seen.
DIR-615 C1 @ HT40
1/1 = 12dBm
1+2/1+2 = 15dBm, chain 2 isn't connected, TX/RX speeds are lower and incorrect
1+3/1+3 = 15dBm, proper connected chains, TX/RX speeds are proper.
1+2+3/1+2+3 = 20dBm, but no clients can connect
Huge conflict right there if you ask me. As well as the DIR-825, max is 18dBm, FCC ID documents say it should be going up to 26dBm like the WNDR3700 does. Both routers have the same radios too. _________________ LATEST FIRMWARE(S)
BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
Posted: Wed Aug 25, 2010 10:01 Post subject: TP-Link TL-WR941ND v4.1
Hi Sash,
IMHO posting values w/o Channel and Regulatory Domain makes "lesser" sense. If I change Channel to 6 and Regulatory Domain to CANADA I get 21dBm 125mW.
But if your just hunting the diff in GUI and CLI the values might suffice
and i see following max set txpwr's in the iwconfig
chains: 1
tx-power: 14dbm
chains: 1+2
tx-power: no wifi access possible
chains: 1+3
tx-power: 17dbm
chains: 1+2+3
tx-power: 19dbm
It's not very much of error and the increase of 3dBm when going from 1 to 2 chains is as expected, you have doubled your output power.
Adding the 3rd chain should give 2dBm more so that is also as expected.
FCC measurements are between 20-24 dBm _________________ Kernel panic: Aiee, killing interrupt handler!
is this pic for the 941? im asking cause its a "MIMO infrastructure ... 2 transmitting and 3 receiving chains" unit which doesnt apply to the attachment u give on first sight. so it should give us about 20 dbm (~17,5dbm + 3db) at tx setting 1+2 or 1+3 (or 1+2+3 cause this should be fallback to 1+X) for a 54mbit link which my units have at least.
as u see even on 1 chain in the B-mode the unit cant do 14dbm. the hw spec shows at least >15dbm as min tx power.
atm my slowest tx connection is at 54mbit and the unit shows 17dbm tx power which should be 20 according to your list. _________________ Forum Guidelines...How to get help
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Forum Rules
&
RTFM/STFW
&
Throw some buzzwords into the WIKI search
_________________
I'm NOT rude, just offer pure facts!
_________________
Atheros (TP-Link & Clones, etc ) debrick service in EU
_________________
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