USRP1 signal conditioning


#1

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/removed_email_address@domain.invalid/msg06810.html
http://www.mail-archive.com/removed_email_address@domain.invalid/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,

  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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