[Hackrf-dev] I Q signal on Oscilloscope

[ERNEST MATEY]

Hi Dominic, 

Thank you very much for ‎responds. 

I had connected to P9 on my hackrf board before. 
But as expected a I see only a single signal. I cannot justify if that is the I component or the Q component. ‎However I am wanting to see both components ( two signals) for my analysis.   How can I do this tapping the base band from P9 as I did? 


What are your suggestions for the levels on my oscilloscope?

Thank you very much
Ernest.  



Sent from my BlackBerry 10 smartphone.
  Original Message  
From: Dominic Spill
Sent: Sunday, March 13, 2016 9:27 AM
To: ERNEST MATEY
Cc: hackrf-dev
Subject: Re: [Hackrf-dev] I Q signal on Oscilloscope

On 13 March 2016 at 07:01, ERNEST MATEY <ernestmatey310 at gmail.com> wrote:
>
> I purchased HackRf one about a month ago. It is a great receiver.
> However for my application, I need to analysis I Q signals on oscilloscope.
> How can I get these two signals from the hackRF board
>
> The Q signal on one channel, and I signal on another channel.
> How can I achieve this from the board?

The P9 header on the board allows you to access the baseband [1].
You'll need to make sure that the levels are appropriate for your
scope, but I would imagine that they should be fine. You can see the
hardware design files in the HackRF repository[2], and you should
consult those for the pin connections.

Thanks,
Dominic

[1] https://github.com/mossmann/hackrf/wiki/HackRF-One#expansion-interface
[2] https://github.com/mossmann/hackrf/