I believe you have to login to this forum in order to see the previous post, so create an account and that should do it. I think originally it was just a private message and when I didn’t find it in the general forum I created this topic so anyone could benefit from it.
But this topic has everything you need to validate/reproduce the tx output power vs frequency graphs. The only thing missing here is the ini file Karolis shared with me that has the configuration, I wasn’t able to attach it here as I don’t have permissions to upload that type of file. I am sure Karolis could re-enable the link if you guys need it.
But basically, in that previous posts this really helped me to reproduce that graph:
State file is configured for A channel operation only;
You have to change the active output band selection in TRF tab (enable either Band 1 or Band 2);
When you load the .ini file, please calibrate all PLLs (press calculate in CLKGEN, SXR and SXT tabs);
When you load the .ini file, please go to TxTSP tab (when A channel is selected), write “7fff” to the field called “DC_REG:” and press “Load to DC I” and “Load to DC Q”.
NOTE: the manual for the lime sdr has explanations for ever field in the GUI, that should help understand some of the configurations, it helped me a lot.
the setup of equipment:
Use the .ini file and instruction provided in the earlier post;
Connect LimeSDR to a spectrum analyzer via cable (in the tested case and U.FL > SMA converter was used)
Do simple power measurement.
On the analyzer:
a span of 10MHz for the test, where RBW and VBW ratio was 100 kHz.
I hope this helps but if you guys have a specific question maybe Karolis or I could help you with that, I think it would be best to just post here so that there is one main post for this topic.