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

RouterOS Wireless Networking
1

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

2

You cannot adjust the power output on a prism card. Use a long jumper…

3

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

4

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.

5

Correct.

6

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.

7

Have you confirmed the signal strengths change when you adjust it?