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[Discuss-gnuradio] USRP1 DBSRX read ADC values

From: Kutik
Subject: [Discuss-gnuradio] USRP1 DBSRX read ADC values
Date: Wed, 14 Oct 2009 03:24:13 -0700 (PDT)

I am using USRP1 with DBSRX. 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. As the RSSI is not available for DBSRX, the idea is to acquire a short signal and analyze the ADC values. The gain value will be set iteratively according the clipping rate and number of utilized ADC bits. I need to analyze the ADC values, as the further processing (e.g. CIC) "corrupts" the signal and the strategy mention above could not be used. My question is how can I read the ADC values? Can I use: adc_val = u->read_aux_adc(which_side, which_adc) In the post aux_adc inputs stands the AUX_ADC is not wired for DVBRX. Can anyone give me a hint how to read the ADC values?

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