So I backed the LimeSDR crowdfunding.
Now I'm eagerly waiting for my unit
This page documents stuff I do relating to LimeSDR, be it software, electrical or mechanical.
I forked the official MyriadRF LimeSDR repository on github for doing my own experiments with it.
My fork can be found here: https://github.com/2ftg/LimeSDR-USB
Mechanical .STEP model of the LimeSDR pcb with reduced component count so that you don't see separate details for all the +280 capacitors and +100 resistors. Some resistors on board edges, all connectors and all large components have been kept.
This was done to make cad design of cases for LimeSDR easier.
The .step file can be found here:
I wrote a tiny bit about the LimeSDR frequency response based on my limited knowledge here:
But because I like content here's a reproduction of it.
Do note that this was/is for ver 1.2 of the pcb, current revision is 1.4 with slight changes.
The RF matching components are size 0402.
Some stuff based on reading the schematics and googling:
TCM1-63AX+ balun transformer is used in the 2-2.6 GHz branches for both TX and RX.
The coupling caps in the 30 MHz-1.9 GHz branch are 100nF, which should be usable on HF, but might be too little at LF.
Other random info and links relating to my LimeSDR adventures:
Official MyriadRF LimeSDR wiki page. This should have tutorial and stuff.
To suggested "first test" with the internal loopback and WCDMA sample did not work for me on Win7 Ultimate as my LimeSDR some how only shows up on USB2 instead of USB3.0.
I had more success with GNU Radio companion .grc flowgraphs from Tatu OH2EAT and the WFM transmit flowgraph I made with his guidance. Those actually worked. I used AOR AR8200 as test receiver.
So far I have worked OH2EAT on 70cm PSK31 and Feld Hell and 13cm Feld Hell with LimeSDR.
The official LimeSDR board is 60mm x 100mm in size, has 12layers and is 1.6mm thick.
Elecrow has cheap 10pcs 10cm x 10cm 4 layer boards:
Right First Time - a Practical Handbook on High Speed PCB and System Design, by Lee Ritchley
yxSDR The Case compatible but retarded cousin of LimeSDR.
OH2FTG Labs >