Problem with spectral scan in VHT80 mode

[Gaurang Ramesh Naik]

Hi Shafi,

I am using QCA9882 (I'm using RB911G-5HPacD). This is what I observed
http://postimg.org/image/vha3pmvhz/

I have one AP-Client running iperf over HT40 and I'm using another AP
for the scan.

Thanks,
Gaurang.

On Tue, Jun 14, 2016 at 1:30 AM, Mohammed Shafi Shajakhan
<mohammed at codeaurora.org> wrote:
> Hi Gaurang,
>
> On Tue, Jun 14, 2016 at 01:08:29AM -0400, Gaurang Ramesh Naik wrote:
>> Apologies for my previous e-mail. I had read the whole page once, but
>> somehow I missed the point about 64 bins for VHT80. It's working now.
>
> [shafi] may i know the chipset you are testing, also if its feasible
> you can share the graph plots of the spectral scan .
>
>>
>> On Tue, Jun 14, 2016 at 12:37 AM, Gaurang Ramesh Naik <gaurang at vt.edu> wrote:
>> > Hello,
>> >
>> > I was trying the ath10k's spectral scan. I used the following commands
>> > given on the link
>> > https://wireless.wiki.kernel.org/en/users/drivers/ath10k/spectral
>> >
>> > echo 8 > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_count
>> > echo manual > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
>> > echo trigger > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
>> > cat /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan0 >> /tmp/fft.dump
>> >
>> > I am using OpenWrt Bleeding edge. In the HT20 and HT40 mode, I
>> > correctly get 8 samples. However, in the VHT80 mode, the /tmp/fft.dump
>> > file generated is empty.
>> >
>> > In the open issues on the above link, it said that the HT40 and HT20
>> > modes ignore the count parameter. That isn't the case for me. I seem
>> > to get correct # of samples (I view the dump file using
>> > https://github.com/simonwunderlich/FFT_eval). However, in the VHT80
>> > mode, there seems to be no output. Am I doing something wrong here?
>> >
>
> regards,
> shafi