R820T retuning speed

[Sdr Guru]

Hi

Small test, old code vs. Keenerd/Tejeez's retuning patches
http://igg.kmkeen.com/ T#140

rtl_fm -d 2 -f 100M:101M:25k -l 3000 -M nil -E speedtest -S 0.25M
...
rtl_fm -d 2 -f 100M:101M:25k -l 3000 -M nil -E speedtest -S 3.1M

old code new code
Sampling at 264000 S/s. 2.01 steps/s error
Sampling at 1008000 S/s. 7.69 steps/s 7.69 steps/s
Sampling at 1104000 S/s. 8.42 steps/s 8.42 steps/s
Sampling at 1224000 S/s. 9.34 steps/s 9.34 steps/s
Sampling at 1320000 S/s. 10.07 steps/s 10.07 steps/s
Sampling at 1416000 S/s. 10.80 steps/s 10.80 steps/s
Sampling at 1512000 S/s. 11.54 steps/s 11.54 steps/s
Sampling at 1608000 S/s. 12.28 steps/s 12.25 steps/s
Sampling at 1704000 S/s. 13.00 steps/s 13.01 steps/s
Sampling at 1824000 S/s. 13.90 steps/s 13.92 steps/s
Sampling at 1920000 S/s. 14.63 steps/s 14.64 steps/s
Sampling at 2016000 S/s. 15.39 steps/s 15.38 steps/s
Sampling at 2112000 S/s. 16.09 steps/s 16.12 steps/s
Sampling at 2208000 S/s. 16.45 steps/s 16.85 steps/s
Sampling at 2304000 S/s. 12.65 steps/s 17.56 steps/s
Sampling at 2424000 S/s. 10.39 steps/s 18.49 steps/s
Sampling at 2520000 S/s. 9.61 steps/s 19.22 steps/s
Sampling at 2616000 S/s. 9.97 steps/s 19.95 steps/s
Sampling at 2712000 S/s. 10.33 steps/s 20.66 steps/s
Sampling at 2808000 S/s. 10.69 steps/s 21.34 steps/s
Sampling at 2904000 S/s. 10.59 steps/s 21.18 steps/s
Sampling at 3024000 S/s. 11.62 steps/s 17.57 steps/s
Sampling at 3120000 S/s. 15.71 steps/s 16.47 steps/s


SG