root@trb-dev:/home/mod6/fg1# stty -F /dev/ttyUSB0 115200 raw -echo -echoe -echok
root@trb-dev:/home/mod6/fg1# dd iflag=fullblock if=/dev/ttyUSB0 of=fg1.fg1.bin
^C2139561+0 records in
2139561+0 records out
1095455232 bytes (1.1 GB) copied, 145669 s, 7.5 kB/s

root@trb-dev:/home/mod6/fg1# ent fg1.fg1.bin
Entropy = 8.000000 bits per byte.

Optimum compression would reduce the size
of this 1095455232 byte file by 0 percent.

Chi square distribution for 1095455232 samples is 272.94, and randomly
would exceed this value 25.00 percent of the times.

Arithmetic mean value of data bytes is 127.4978 (127.5 = random).
Monte Carlo value for Pi is 3.141490306 (error 0.00 percent).
Serial correlation coefficient is -0.000031 (totally uncorrelated = 0.0).
root@trb-dev:/home/mod6/fg1#