Hi All,
Been using my Lime board for a few days - mostly powered by the USB3. RF signals through either of the 3 RF paths are quite weak.
I looked at the Quick Test procedures:
https://wiki.myriadrf.org/LimeSDR-USB_Quick_Test
Loopback test with WCDMA has the right profile, but also a few spurs (i have LimeSDR in luftek’s enclosure+ front/rear plates). Having read in a few threads that USB power is not the cleanest one, i switched to 6V EXT power supply.
With EXT power supply i do not get any LED lights on. the board seems dead. I also used benchtop power supply (adjusting the voltage between 6V and 12V) and verified the voltage/polarity at the 6-12V socket pads - the right voltage gets there, but no current is being drawn.
I cannot see 3.3V on the FAN header and pads, neither when USB3 powers the board nor with EXT power supply.
Is my board defective ? Am i missing something here ? Any other tests i need to do (i might start looking at schematics and probing different points through power distribution)
If my Lime is defective, what is the return/replacement procedure?
Thank you.