I use GNURadion (3.7) to generate signal and pass it to LimeSDR using regular block “LimeSuit Sink (TX)”.
So, everything is straight forward.
I observed next behavior:
- Transmission is fine up to 50MHz bandwidth (approximately).
- After 50MHz of bandwidth, transmission becomes unstable: board transmit approximately one minute then it stops for one minute. So, it is up and down. Absolutely NO diagnostics is coming from GNURadio.
- I try transmission with different transmission gain, different frequencies (200MHz, 900MHz), different calibration bandwidth (see GNURadio “LimeSuit Sink (TX)” block) – results are the same: Up and Down
- I used external power supply (12V 2A) – result is the same: transmission is Up and Down
After having this fun for couple of week I decided to ask for help:
What is REAL max transmission bandwidth on LimeSDR-USB?
How can I check whether or not external power supply is REALLY used by LimeSDR. Yes, I see light on board coming up when I connect external power supply. But I have an impression that board does not use it. I did not find any info how can I check what power source is used by board.
Thanks in advance.