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[Discuss-gnuradio] USRP FLEX900 Daughter Boards Calibration
From: |
Shabbir Ahmed |
Subject: |
[Discuss-gnuradio] USRP FLEX900 Daughter Boards Calibration |
Date: |
Wed, 29 Jul 2009 04:29:35 -0700 (PDT) |
Dear All:
I need to calibrate my USRP with Flex900 daughter boards to take real world
measurements in dBm. But I am confused with the gain parameter that is used
in usrp_fft.py.
1. Not sure whether the RFX900 board has a PGA of its own
2. Or is it just the AD9862 PGA before the ADCs
3. The gain bar/parameter varies over 0-90, what does this represent?
4. When you increase the gain from 0 till 30 or abouts there is no change in
the noise floor? why is that?
If you have any docs that I can go through to understand the gain
characteristic, please.
Kind regards,
Shabbir
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- [Discuss-gnuradio] USRP FLEX900 Daughter Boards Calibration,
Shabbir Ahmed <=