[Hackrf-dev] Finding the Interference with directional antenna?

[Tamer Çelik]

Hello everyone,
Thanks for all the tips.
I was thinking getting this antenna:
https://www.amazon.com/Super-Power-Supply-Directional-Wireless/dp/B016APUGB6/ref=sr_1_8?s=pc&ie=UTF8&qid=1481113798&sr=1-8&keywords=wifi+directional
It's compact and perfect for 2.4 GHz band. Just need to get an RP-SMA to
SMA converter adapter to use it with HackRF.

But i am still not sure where to look for interference.
Which software i should use and what should i look for?
I was thinking running SDRsharp with RX gain settings adjusted (low gain
settings to pick any signal from 2.4GHz device when i physically close to
it)
I have decided to use HackRF after i came across a wifi analyzer device
called Chanalyzer http://www.metageek.com/products/wi-spy/ They provide a
fancy software to determine possible intereference source and they are
quite expensive, around $2000.
But i think i won't need any fancy software or look out for any specific
waveform determine this interference, right?
Again, i have no idea what should i look for. (Noise? Waveform?)

Any ideas would be great.
Thanks!


On Wed, Dec 7, 2016 at 8:21 AM, Scott Davis <scottk5ta at gmail.com> wrote:

> There are many, many commercial directional antennas available for the 2.4
> GHz band.  Dish Network operates in the Ku-band, around 12 GHz, so their
> dishes are a bit small for 2.4, but it sounds like fun to play with
> one…it’s a lot easier to use a smaller, lightweight yagi.  They come in all
> sizes.  Here’s one example:
>
> https://www.amazon.com/gp/product/B008Z4I7WQ/ref=oh_aui_
> detailpage_o01_s00?ie=UTF8&psc=1
>
> -Scott
>
>
> On Dec 6, 2016, at 8:41 PM, Chuck McManis <chuck.mcmanis at gmail.com> wrote:
>
> In the US there is a company called Dish Network (satellite TV) they
> use a small dish antenna to talk to the satellites, it also makes a
> great starting point for a directional WiFi antenna. Remove the LNB
> that is normally in the antenna and tape a WiFi chip antenna at the
> focal point. You can then point quite accurately at various WiFi
> sources.
>
> <http://tse1.mm.bing.net/th?&id=OIP.M2844c9d84173dc5d1b923fed7c9ed
> f64o0&w=300&h=300&c=0&pid=1.9&rs=0&p=0&r=0>
> is a picture of one of these antennas.
>
> --Chuck
>
> On Tue, Dec 6, 2016 at 5:20 PM, Tamer Çelik <tamercelik at gmail.com> wrote:
>
> Hello,
> I am having a strange interference issue on my 2.4GHz WiFi network while
> 5GHz band works perfect.
> This might be coming from one of my neighbours.
> Just wanted to ask if its possible to use a "directional" antenna with
> HackRF and explore the area for possible source of interference?
> I am pretty sure on that something jamming 2.4GHz for random intervals.
> Any suggestions?
> Thanks!
>
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