Editing Talk:N900 Hardware Power Consumption
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Moved the whole thing to discussion since that's where it belongs when it turns into a talk | Moved the whole thing to discussion since that's where it belongs when it turns into a talk | ||
- | those values are moot - for the first 2 it's irrelevant which process is *idle* since the CPU should zeroclock anyway, alas here it's at fixed clock-freq which is NOT recommended. For the rest the only useful audio source to run those tests is a pink noise at 0dB. See `man sox` for how to create such file. Or to set volume to 1 step above zero, see above - so the whole music content becomes irrelevant. For arbitrary music the amplifier will introduce random "noise" up to 2000mW to the figures. The | + | those values are moot - for the first 2 it's irrelevant which process is *idle* since the CPU should zeroclock anyway, alas here it's at fixed clock-freq which is NOT recommended. For the rest the only useful audio source to run those tests is a pink noise at 0dB. See `man sox` for how to create such file. Or to set volume to 1 step above zero, see above - so the whole music content becomes irrelevant. For arbitrary music the amplifier will introduce random "noise" up to 2000mW to the figures. The BQ24150 can't average out that noise. Further there's "GUI on" which means "backlight" and that's very random and even depending on ambient light, see 3 bullets above --[[User:joerg_rw|joerg_rw]] 12:52, 13 May 2015 (UTC) |
Not fixed, it's ondemand w/ bottom freqs allowed as specified. | Not fixed, it's ondemand w/ bottom freqs allowed as specified. | ||
I restarted the same track every time, so the comparison should be quite adequate, tho a noise would be better, yep. Also, where did you get the information regarding the bq24150 performance? Such spikes (if there are any) would be smoothed by the capacitors on the power lanes and then detected by bq24150, no? I didn't get any numbers on it from the datasheets tho. | I restarted the same track every time, so the comparison should be quite adequate, tho a noise would be better, yep. Also, where did you get the information regarding the bq24150 performance? Such spikes (if there are any) would be smoothed by the capacitors on the power lanes and then detected by bq24150, no? I didn't get any numbers on it from the datasheets tho. | ||
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- | + | When there's GUI ON then what's the meaning of that when there's no backlight? | |
- | + | Generally those values over at main page are meant to be reproducable by others, otherwise they are useless. Neither a "GUI ON, BackLight Off" nor "always same (unknown) random music file" is reproducable by others. | |
- | + | --[[User:joerg_rw|joerg_rw]] 03:33, 15 May 2015 (UTC) | |
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** idle @125MHz: 45mW T | ** idle @125MHz: 45mW T | ||
** idle @250MHz: 76mW T | ** idle @250MHz: 76mW T |
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