Unable to enable_test_clock(true)


I’m trying to enable test clk pins at J503. I’m using latest uhd-driver
and latest gnuradio-uhd.

I make change to clock_ctrl.cpp file under uhd-driver/host. Inside
usrp2_clock_ctrl_impl class’s constructor, I put
enable_test_clock(true). I recompile UHD and run GRC. But I don’t get
any signal at J503. Can anyone please advice?