Text only | Text with Images

LowPowerLab Forum

Hardware support => Moteino => Topic started by: john k2ox on September 26, 2013, 11:24:48 PM

Title: Real-Time Spectrum of a Moteino Transmission
Post by: john k2ox on September 26, 2013, 11:24:48 PM
I've attached a RTSA snapshot a Moteino sending 1000 bps at 10 KHz deviation.  I think it looks pretty neat.  Enjoy.
Title: Re: Real-Time Spectrum of a Moteino Transmission
Post by: Felix on September 27, 2013, 07:41:18 AM
You bet it does. I dare not ask how much such an analyzer cost...  :'(
Title: Re: Real-Time Spectrum of a Moteino Transmission
Post by: john k2ox on September 27, 2013, 08:42:53 AM
They start at $35K.  This one is fully loaded abt $100K.  I can fix you up.  :)
Title: Re: Real-Time Spectrum of a Moteino Transmission
Post by: Felix on September 27, 2013, 08:50:57 AM
WHOA!  ;D
Title: Re: Real-Time Spectrum of a Moteino Transmission
Post by: jbeale on October 02, 2013, 01:34:06 PM
It is less pretty, less accurate, and less sensitive, but you can do something similar for under $100 with a cheap 'ezcap' USB dongle and HDSDR / Spectravue software.  I presume as a new user I cannot post a direct link to it, but search for
"915 MHz band spectrum of JeeNode" site:picasaweb.google.com and you'll see my result using those tools.

Or maybe a direct link does work:
(https://lh4.googleusercontent.com/-h6zJk8JXWm8/T7PbrLEUI6I/AAAAAAAACog/eanXz0uh7wM/s1280/JeeNode-915MHz-output.jpg)
Title: Re: Real-Time Spectrum of a Moteino Transmission
Post by: Felix on October 02, 2013, 02:06:52 PM
Thanks, good to know!
Text only | Text with Images