[aprssig] HackRF as SDR for ham use?
wb4gcs at wb4gcs.org
Sun Aug 3 11:32:03 CDT 2014
I have used wireshark on a wireless connection. There are things that
it can do on a wired connection that it can't on wireless (at least the
wb4gcs at amsat.org
On 8/3/2014 11:32 AM, Chuck Gooden wrote:
> To capture and decode Wi-Fi traffic, down load a copy of wireshark at
> http://www.wireshark.org. There is a link for a 802.11 packet capture
> but it is expensive. wireshark is a very good tool that I use at work
> and is very full featured. I have never tried it on a wifi connection
> but it will probably work, and if it doesn't its free so it wont cost
> you anything.
> On 8/2/2014 11:00 PM, Greg D wrote:
>> Hi John,
>> Non-Ham related question... Professionally, I work in the Wi-Fi
>> area, and was also interested in being able to use the HackRF for
>> capturing and decoding Wi-Fi traffic, as well as getting a better
>> look at the RF environment (spectrum analysis). Can this be done
>> with the available (free) software?
>> Sounds like a really interesting and fun conference!
>> Greg KO6TH
>> John Gorkos wrote:
>>> I'm at BlackHat right now, and just finished the first day of classes,
>>> hands on, with Michael Ossmann and the HackRF. I've barely had any
>>> with it at all. It has extremely low transmit power, and is classified
>>> as "test equipment" to avoid all of the FCC legalities for type
>>> certification. I can tell you I've gotten 20MHz of bandwidth samples
>>> out of it, into a Linux VM on my MacBook pro, and it seems to be pretty
>>> slick. Tomorrow will be more hands on with the device, and a LOT of
>>> time in GnuRadio. Obviously, based on the fact that we're at BlackHat,
>>> most of the concentration is on security and penetration. Things like
>>> finding unknown signal types in a very large chunk of spectrum, then
>>> locating and identifying those signals.
>>> BTW, Michael is a real genius at explaining SDR techniques and the math
>>> behind them. At the beginning of the class, he passed out little green
>>> plastic slinkys with his company logo on them. Today, about halfway
>>> through the afternoon session, he used the slinkys to explain how a
>>> wave and cosine wave look the same, depending on whether you're looking
>>> at them from the imaginary or real number point of view, and that the
>>> slinky represents the longitudinal axis of time extending out of the
>>> paper, as you plot complex numbers on a two axis system. Freaking
>>> brilliant. If you ever get the opportunity to go to one of his
>>> classes, you'd be a fool to decline.
>>> I'll try to provide more info about the device tomorrow. I'm mentally
>>> and physically drained after a day of complex math.
>>> John Gorkos
>>> On 8/2/14, 6:13 PM, Greg D wrote:
>>>> Hi folks,
>>>> I see there's a new SDR receiver being built for the "hacker"
>>>> community: http://hakshop.myshopify.com/products/hackrf
>>>> They claim it's compatible with SDR#, so I wonder how well it will
>>>> for the variety of digital ham radio purposes? It's a little
>>>> pricy, but
>>>> claims to cover 10mhz to 6 ghz, so that would cover through our
>>>> 5.65-5.925ghz allocation. I don't know what the bandwidth is.
>>>> Greg KO6TH
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>>>> aprssig at tapr.org
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