Sweep

Hello All
I want to generate 10mhz signal . with center frequency 825 Mhz .actually i saw deviceCalSweep function in limeutil.cpp file (limesuite source code) which sets start, stop, step arguments then i modified the code and then i connected LimeSDR with spectrum analyzer to monitor the generated wave form it only shows locked frequency not complete sweep . but there i observed only center frequency ( a peak at 825 Mhz ) .sweep1