A difference in tx power like that is usually caused by the presence of an external power amplifier on the board between the SoC and the antenna that isn't getting turned on, or otherwise misconfigured.
Cheers, Owen On Sunday, April 20, 2014, Matthias Schiffer <[email protected]> wrote: > Hi, > I recently contributed the patches to support the TL-WR841 v9, and I'm > getting reports that the TX quality of these devices is terrible on > OpenWrt (RX looks fine). > > iwinfo reports Tx-Power: 19 dBm, and in the next room I get about -80 > dBm when the device is running OpenWrt, while I get about -60 dBm with > the stock firmware. > > On a TL-WR841 v7 I have Tx-Power: 21 dBm and see -55 ~ -60 dBm in the > exact same constellation (using OpenWrt). > > Does anyone have an idea what could cause this or where I could start to > debug this? Unfortunately there don't seem to exist many devices using > QCA953x SoCs yet... > > You can also contact me on IRC, I'm hanging around in > #openwrt/#openwrt-devel as neoraider. > > Thanks in advance, > Matthias > >
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