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[Discuss-gnuradio] USRP1 signal conditioning
From: |
Kutik |
Subject: |
[Discuss-gnuradio] USRP1 signal conditioning |
Date: |
Tue, 2 Jun 2009 01:33:31 -0700 (PDT) |
My goal is to implement signal conditioning algorithm. Input is the tuned
frequency, output is the optimal gain settings to utilize the full range of
ADCs with saturation below acceptable threshold.
I would like to ask for clarification regarding the over-count value. From a
thread "usrp: rssi/clipping indicator, data glitches"
http://www.mail-archive.com/address@hidden/msg06810.html
http://www.mail-archive.com/address@hidden/msg06810.html
I see the over-count value can be obtained like urx->_read_fpga_reg(5 +
which_adc)
The returned value 32bit: The lower 16 bits has the RSSI value, and the
upper 16 bits has the over-count value.
1) How to reset the over-count value? urx->_write_fpga_reg (5 + which_adc,
0)
2) The over-count value counts the clipped samples. What is the period under
test? Is it number of clipped samples since reset?
3) What happens when the over-count value reaches its max (2^16)? Does it
stays at max?
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