root@trb-dev:/home/mod6/fg5# dd iflag=fullblock if=/dev/ttyUSB0 of=fg5.fg2.bin
^C2396573+0 records in
2396573+0 records out
1227045376 bytes (1.2 GB) copied, 156981 s, 7.8 kB/s

root@trb-dev:/home/mod6/fg5# ent fg5.fg2.bin 
Entropy = 8.000000 bits per byte.

Optimum compression would reduce the size
of this 1227045376 byte file by 0 percent.

Chi square distribution for 1227045376 samples is 272.71, and randomly
would exceed this value 25.00 percent of the times.

Arithmetic mean value of data bytes is 127.4971 (127.5 = random).
Monte Carlo value for Pi is 3.141573474 (error 0.00 percent).
Serial correlation coefficient is 0.000009 (totally uncorrelated = 0.0).
root@trb-dev:/home/mod6/fg5#