maemo.org - Talk - View Single Post - Adjusting the power from 100 to 10mW on the wireless, saves battery???

	fnordianslip	2010-01-12 , 20:39
	Posts: 670 \| Thanked: 359 times \| Joined on May 2007	#21

Originally Posted by fraaaaanka

I did a run round the main places i use my N900 in the house to test the quality (using Conky) once using 10mW and once using 100mW.
Here are the results

..........................100mW..........10mW
next to pc............100%..........100%
kitchen................63%..............60%
bedroom.............55%..............58%
toilet ............41%.............43%

so from that there is no difference to the quality on 10mW or 100mW it just depends on the question .... what extra battery time do you get.
Maybe i should fully charge the battery, stream in video on 100mW and see how long it takes till the battery dies then recharge and retry on 10mW

You are measuring the received signal strength on the N900. That's pretty irrelevant. You need to look at the 'Rate' in conky, to see if that drops. With the lower power output, the wifi link will drop to a lower rate in some places as the signal received by the access point will drop below the signal to noise ratio required to sustain the higher rate.

Also, IIRC, with a lower tx power from the N900, the access point may well increase its power, if it assumes that the connection is symmetric, so that could also affect the Connection Quality reported by Conky.

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