LimeSDR Levels Diagnostic

Diagnosing problems when LimeSDR TX/RX levels are reduced and/or different across A & B channels.

Check list

 * 1) Are RF matching networks identical?
 * 2) Are all A and B channel settings identical?
 * 3) Has any  RF matching changes been carried out?
 * 4) Was proper ESD protection used?

Possible causes

 * 6dB+/-1dB suggests damage to one LNA or TX pin
 * >25dB suggests mechanical failure or catastrophic ESD event
 * General numbers 3-15dB suggest mismatch in GUI settings or RF matching

Note that at higher frequencies, component tolerance on RF matching can cause a small gain mismatch, usually <3dB.

Reporting problems

 * 1) Clearly state the exact difference in gain  in dB and the frequency it was measured at
 * 2) Provide details, including versions of:
 * 3) FPGA gateware and FX3 firmware
 * 4) Lime Suite
 * 5) Application software
 * 6) Wherever possible supply a Lime Suite .ini file