[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

From: Drew Read
Subject: [Discuss-gnuradio] High pass frequency response with LFRX boards
Date: Fri, 5 Nov 2010 12:24:00 +1300

Hi All,

We're seeing pretty much the same thing on the USRP1 as this:

It seems that there is a very significant roll-off at lower
frequencies on the receive side which pretty much makes it unusable
for our baseband signals.
The aformentioned forum post suggests that it is not caused by the
LFRX board and so is likely to be something in the fpga...

Just to reiterate the questions from this forum post.
1) What on the FPGA is causing this frequency response? (and what can
we do about it?)

2) Why does this happen only in the RX path?

And the original poster also wanted to know:
3) According to
     http://gnuradio.org/redmine/wiki/1/USRP2GenFAQ   reference:
     "How can I use both A/D converters on the USRP2?"
   feeding the signal to RX_B does not give ANY output on the ADC

If anyone can offer any help at all with this it'd be much appreciated.


Andrew Read +64 (03) 357 0787
Test Analyst
Design Verification and Validation Team
Tait Electronics Ltd
This email, including any attachments, is only for the intended
addressee.  It is subject to copyright, is confidential and may be
the subject of legal or other privilege, none of which is waived or
lost by reason of this transmission.
If the receiver is not the intended addressee, please accept our
apologies, notify us by return, delete all copies and perform no
other act on the email.
Unfortunately, we cannot warrant that the email has not been
altered or corrupted during transmission.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]