[Discuss-gnuradio] A/D Output

[Sharif Shaher]

 Hello,

I am using gnuradio and a usrp2 to capture samples (shorts) to a file, 
that is 16 bit I and 16 bit Q.
I looked at this data in matlab and noticed that in many instances the 
samples exceed 13 and 14 bits
for both positive and negative numbers (ie -12567 or +12989).

I was under the impression that a 14 bit a/d meant 13 bits plus a sign 
bit so max 8191, min -8191.

Should I expect this behavior, am I interpreting something incorrectly.  
If this is expected
can someone please explain.  I though the rx_gain was applied before the 
a/d so the max
output would be be 13 bits plus a sign bit.

Thank you,
Sharif