ecb-3500 tx power

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mdcoll25
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Joined: 13 Feb 2010
Posts: 8

PostPosted: Sun Mar 21, 2010 0:29    Post subject: Reply with quote
I see the new beta to fix this problem has been removed from download , I guess you guys are working on it some more.
make another post when you have up up again for a test.
Cheers, Mike
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jbolivar
DD-WRT Novice


Joined: 07 Apr 2009
Posts: 2

PostPosted: Mon Apr 12, 2010 14:46    Post subject: Brand new and have tx power limit Reply with quote
Dear Srs, I read the post and I have the same problem, I bought a brand new ECB-3500 but I can't get more TX power that 18 dBm, I can get less but no more that this.

I try to change the WiFi configuration parameters but I had the same result.

I think that is a bug in the firmware for this specific model.

Regards,

Julian Bolivar.
www.julianbolivar.com
Sash
DD-WRT Guru


Joined: 20 Sep 2006
Posts: 17619
Location: Hesse/Germany

PostPosted: Mon Apr 12, 2010 15:08    Post subject: Reply with quote
have u read this topic?! i guess not.
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mdcoll25
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Joined: 13 Feb 2010
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PostPosted: Mon Apr 12, 2010 20:02    Post subject: Reply with quote
Sash , I reccommend you read your clients !

I see a lot of people reporting this power problem and you seem completely uninterested in helping them

I'm a paying client - please support my desire to keep BUYING you product.
Your documentation is often out of date and hard to find things on.

I've purchased 6 licenses now for devices that have the same power problem.
I ask again : Please explain HOW to get the maximum power out of these Engenius devices , please dont waste your CUSTOMERS time with meaningless one-liner replies like 'PowerOffset'
jbolivar
DD-WRT Novice


Joined: 07 Apr 2009
Posts: 2

PostPosted: Wed Apr 14, 2010 18:39    Post subject: Reply with quote
Sash wrote:
have u read this topic?! i guess not.


Really I wait a more professional answer because I thought that dd-wrt are...

But why I think that you have a problem with your firmware and some ECB-3500 hardware?

Because at the AP output I put a 55 dB attenuator and connect it to a Spectrum Analyzer (SA).

If I configure the Tx output power to 15 dBm and get 15 dBm - 55 dB = -40 dBm and this is Ok in the SA.

When I change the Tx power to 18 dBm I get -37 dBm at the SA and this is correct.

After I change the Tx power to 20 dBm and I get -35 dBm at the SA and this is correct, but at the status page it show an 18 dBm Tx power.

Then I change the Tx Power to 22 dBm and I get changes between -35 dBm and -33 dBm in the SA, it is strange because I don't know why these fluctuations in the Tx power, but the Status page show 18 dBm.

I change the Tx power one more time to 25 dBm and I get changes between -34 dBm and -30 dBm in the SA, and the Status page show 18 dBm.

And to finish I put the full power to 27 dBm and at the SA I get variations from -34 and -29 dBm, the peak is 1 dB below the expected output power of -28 dBm and the status page show 18 dBm Tx output.

At this moment really I don't know if the 806.11g have some output power control in the standard to explain the output power changes, but the point is that after 18 dBm at the output the firmware always show 18 dBm and the hardware is generating more that it.

One final recommendation, really take care what your costumer say, because we are who support your work.
Sash
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Joined: 20 Sep 2006
Posts: 17619
Location: Hesse/Germany

PostPosted: Wed Apr 14, 2010 18:41    Post subject: Reply with quote
there already WAS a professional aw before! i hate to repeat myself

Sash wrote:
the magic word is "power offset"...
read the hw specs

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mdcoll25
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Joined: 13 Feb 2010
Posts: 8

PostPosted: Wed Apr 14, 2010 20:54    Post subject: Reply with quote
So there you go again.
In your whole website 'poweroffset' does not get mentioned one time except this one word you mentioned before.

Not in the documentation , not in the wiki , or the forums.

You standard of support is extremely low and you are wasting our time.

I want a refund of my 6 licenses. The software is not suitable for release on high power Engenius hardware.
I will be talking to the Engenius distrubutors in this country about the problem and they have been promoting this incompatible software.

The Gargoyle guy has offered to fix this problem where you have failed to.
wim
DD-WRT Novice


Joined: 05 Jul 2009
Posts: 3

PostPosted: Tue Jun 01, 2010 15:00    Post subject: Wrong data tx power in Wireless Status. Reply with quote
ECB3500 met DD-WRT v24 preSP2 [Beta] Build: 12188

Vermogen:

Mijn bevindingen:

In WRT in Wireless Basic Settings is een mogelijkheid om het vermogen aan te passen. Deze staat standaard op 20dBm (100mW) en antenna gain op 0dBm.
Als we met deze instellingen naar Status Wireless gaan zien we dat daar een waarde staat van 18dBm (63mW). Is dat niet vreemd?
Wanneer we het vermogen in Wireless Basic Settings omhoog zetten op bijvoorbeeld 23dBm (200mW) dan zien we dat de waarde in Status Wireless onveranderd blijft staan op 18dBm. Nou vraag ik je…..

Volgens WRT komt er dus niet meer uit dan 18dBm terwijl de ECB3500 27dBm zou moeten kunnen leveren.

Metingen HP Spectrum Analyzer:

In WRT in Wireless Basic Settings staat de TX Power optie op 20dBm. In Status Wireless wordt dus nu een waarde van 18dBm aangegeven.
Met deze instelling meet ik nu een vermogen van 26dBm (398mW) op de analyzer. Wanneer ik de optie Regulatory Domain van NETHERLANDS op UNITED_STATES zet in Wireless Basic Settings dan zie ik dat het vermogen nog zelfs iets wat oploopt. In Status Wireless is nu de waarde van 18dBm naar 19dBm gegaan terwijl we nu in werkelijkheid ruim 26dBm meten aan de uitgang van de ECB3500 met de analyzer.

Als we nu uitgaan van de meest ideale meetopstelling, dus zonder tussenkomst van pluggen kabels etc… denk ik dat het uiteindelijke vermogen van de ECB3500 zeer dicht in de buurt komt van de beloofde 600mW.

Met vriendelijke groet,

Wim de Jong


The data is wrong.... 18dBm is in real 26dBm.
Sash
DD-WRT Guru


Joined: 20 Sep 2006
Posts: 17619
Location: Hesse/Germany

PostPosted: Tue Jun 01, 2010 20:32    Post subject: Reply with quote
plz install the latest beta first
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