i can demodulate tetra good but minimum samplerate i can do is 1msps at 3ghz double core cpu is 100% in use.so i want to demodulate it with lower value. when i try lower value

example 192ksps it doesent work.so im asking any workarounds?im using noxon dab/dab+"fc00013"

is it rtl chip that cannot do under 1msps?and on gnuradio under 1msps fft is very slow but 1+ its normal.