Using LimeSDR-USB a 3.7 GNURadio flowchart is created for displaying MER and exact frequency.
QPSK and 1500,1000,500,333,250,125 kS are supported.
Frequency step is fixed at 250 KHz, according to band plan.
External clock for Lime is not yet supported in flowchart.
Python code is attached (you have to remove the .txt).