[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
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:1.9.1.12) 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
wrong.
--
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org