[USRP-users] How to use a Ham It Up with the USRP B210

Alex Humberstone alex.m.humberstone at gmail.com
Sun Jul 5 08:30:56 EDT 2020


Thank you very much Marcus!
Really appreciate the help!


On Fri, 3 Jul 2020 at 11:18, Marcus D. Leech via USRP-users <
usrp-users at lists.ettus.com> wrote:

> On 07/03/2020 12:03 PM, Alex Humberstone via USRP-users wrote:
>
> Just a quick and basic question. I want to receive down at like between
> 1MHz and 10MHz. I have a USRP B210. I knwo that the USRP B210 only goes
> down to 70MHz. So I bought a Ham It Up (
> https://www.nooelec.com/store/ham-it-up.html) upconverter to get down to
> like 1MHz and 3 MHz. So how does this all work? Does the Ham It Up
> upconvert the frequency range from 100KHz to 65MHz up to a center frequency
> of 125MHz? So then isn't it true that if I tune the USRP B210 to 125MHz, I
> would see my two 1MHz and 3MHz input tones appearing up at 33.5MHz and
> 35.5MHz? Just want to clarify this in my mind. Thanks a LOT for your help
> everyone!
>
>
>
> --
> Sincerely,
> Alex-M-Humberstone
> PhD Student
> Klipsch School of Electrical Engineering
> New Mexico State University
> Las Cruces, New Mexico
>
>
> Not quite.
>
> An upconverter conceptually *ADDS* the incoming frequency to the LO
> frequency.  In the case of the HamItUp, the LO frequency is 125Mhz.
>   So, to "see" 1MHz signals, you'd tune the B210 to 125MHz + 1Mhz ==
> 126MHz.  For a 20Mhz input signal, 125MHz + 20MHz = 145MHz, etc.
>
>
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>


-- 
Sincerely,
Alex-M-Humberstone
PhD Student
Klipsch School of Electrical Engineering
New Mexico State University
Las Cruces, New Mexico
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