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How to reduce tx-power NL-2511MP (prism) Card

Posted: Sun Apr 20, 2008 7:46 am
by marcelocbf
Hello,

I just bought a Senao NL-2511MP miniPCI (200mW) that works with the Prism Chipset ...
I have an 15dbi antenna attached to this card and I cannot have this card's output power because of my regulatory domain ... So I have to reduce the card's output power to 100mW.

I have another card that uses the Atheros Chipset, and I see the option to set it manually (on the Winbox) to all-rates-fixed, but there is no such option for this Prism chipset, but besides this I see another option that says prism-cardtype ...

My question is ... setting prism-cardtype=100mw will do the trick ? Can I set it the same way as Atheros' ?

Thanks

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Sun Apr 20, 2008 6:53 pm
by jwcn
You cannot adjust the power output on a prism card. Use a long jumper...

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Mon Apr 21, 2008 7:13 am
by marcelocbf
You cannot adjust the power output on a prism card. Use a long jumper...
is that true ?

While waiting ... I tried to set the manual-tx-power-table to the values I'd like to ... and I'll try to monitor the interface tomorrow but after what you said ... this is bad ...

What you mean with "long jumper ...." ?

Thanks

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Thu May 08, 2008 4:16 am
by parrini
You cannot adjust the power output on a prism card. Use a long jumper...
What you mean with "long jumper ...." ?
I think he means to use an extra long cable (jumper) to connect the antenna to obtain signal attenuation trough cable loss which is usually known and well documented.

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Thu May 08, 2008 4:22 am
by jwcn
Correct.

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Sun May 11, 2008 9:06 pm
by nickb
Yes, you can reduce prism TX power; it just has to be done from the terminal window.

See my last reply in this threat.

I have used this method in production since then several times, successfully reducing power levels for short links.

Re: How to reduce tx-power NL-2511MP (prism) Card

Posted: Mon May 12, 2008 1:45 am
by jwcn
Have you confirmed the signal strengths change when you adjust it?