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Re: [Discuss-gnuradio] High pass frequency response with LFRX boards

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] High pass frequency response with LFRX boards
Date: Thu, 04 Nov 2010 20:08:08 -0400
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100907 Fedora/3.0.7-1.fc12 Thunderbird/3.0.7

On 11/04/2010 07:47 PM, Eric Brombaugh wrote:
> You're probably seeing the high-pass behavior of the RX DC offset
> removal. There's a logical block inside the FPGA which integrates the
> ADC DC offset and subtracts it from the incoming signal.
> This function isn't needed on the TX side.
Would it have such a high corner-frequency, though? Seems like the DC
estimate integrator function
  could easily be arranged to have a corner frequency much lower than
1KHz.  But maybe I'm

Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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