I testing my new LimeSDR-mini. I testing with CubicSDR and Console v3. With Console v3 and CubicSDR v0.2.3 working stable but not with newer versions. I tried to receive signals from 10 MHz, but any signal on screen. If I tested with signal generator, then I could see that the receiver started to work just above 30 MHz. I think LO does not work. Can it be changed on settlements or my equipment is bad?
I do not known. I bought a month ago. In LimeSuite after GET INFO I get:
Device: LimeSDR-Mini
Expansion: UNSUPPORTED
Firmware: 5
Hardware: 0
Protocol: 1
Gateware: 1.26
Gateware rev: 1.26
Gateware target: LimeSDR-Mini
Joe
The specifications for the Lime Mini clearly state that the operational bandwidth is from 30 MHz to 3.7 GHz. So there is no direct solution to seeing signals below 30 MHz.
If you absolutely have to have a look at signals below 30 MHz I would suggest using an upconverter with the LO sourced from the TX channel.
You will also find that reading and understanding the ARRL Radio Handbook to be VERY helpful. You will find many solutions illustrating your delima. It’s a very easy problem and solution. However, your going to need to solder up a few components.
There is a lot to know, so be kind to yourself.
Most importantly, don’t be fooled by the relatively low price of the Lime Mini. 10 years ago you would have paid 10’s of thousands of dollars to have the same functionality. It is a very sophisticated device.
LimeSDR Mini works just fine below 30MHz. Mini can work even below 10Mhz but with reduced sensitivity and reduced output power because of inadequate matching network. At the moment there is no min frequency limitaion in Limesuite library. Both LimeSDR devices uses same LMS7002M chip and biggest RF differnce is antenna matching network. Because huge frequency spectrum coverage some compromise are made. Unfortunatelly HAM radio bands below 30MHz are not commercially attractive like 3G,4G,WiFi or other hot bands for professionals or academic researchers.
This few pictures are only for demonstration how LimeSDR-mini receive below 30 MHz with simple wire dipole, 4 meter high under attic:
(SDR# 20m band screen)
@yt7pwr
I am interested to know more about your setup.
Do you have your LimeSDR-mini setup to communicate directly with WSPR-X? Do you have SDR# as a middleman program between LimeSDR-mini and WSPR-X?