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[Discuss-gnuradio] A/D Output
From: |
Sharif Shaher |
Subject: |
[Discuss-gnuradio] A/D Output |
Date: |
Thu, 30 Sep 2010 17:38:10 -0400 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.9) Gecko/20100915 Thunderbird/3.1.4 |
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
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