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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