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FS#1799 - ath79: ath9k AR9223 tx power can't be set to 19dBm #6751

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openwrt-bot opened this issue Aug 20, 2018 · 3 comments
Open

FS#1799 - ath79: ath9k AR9223 tx power can't be set to 19dBm #6751

openwrt-bot opened this issue Aug 20, 2018 · 3 comments
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flyspray

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Pilot6:

On ath79 build for DIR-825B1 tx-power on 2.4 GHz doesn't set to maximum 19 dBm.
It is allowed in degdb and is listed in iw list.
But setting it to 19dBm results in 18dBm.
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blackbox:

I seem to have the same issue on a BT Home Hub 5 Type A.

The transmit power for radio 1 (AR9287 - 2.4GHz) defaults to 18dBm and although it offers 19dBm and 20dBm they won't apply. It'll only use 20dBm if I change the country code to the US, despite 100mW being the maximum across Europe.

I'm currently using OpenWrt 19.07.0-rc2.

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adrianschmutzler:

The maximum configurable txpower is based on the maximum allowed value minus the antenna gain. I assume the antenna gain for your device is 2 dB, so you can't set anything above 18dB for the txpower?

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Pilot6:

That's correct. I don't have the device right now, but I will have it next week.

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