[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] LFRX problems
From: |
Martin Dvh |
Subject: |
Re: [Discuss-gnuradio] LFRX problems |
Date: |
Fri, 05 May 2006 01:03:06 +0200 |
User-agent: |
Debian Thunderbird 1.0.2 (X11/20051002) |
Brett L Trotter wrote:
> I've been attempting to get my LFRX daughterboard working on a USRP
> board. Most of the gnuradio-examples I've tried don't work on the LFRX
> (they worked on basic rx). For instance, some of them come up and the
> graph displays are not moving until I drop the gain to 0-3. Some lock up
> and are not adjustable.
>
> Is there something obvious I'm missing?
The LFRX is a true DC - 30 Mhz board.
DC means you either have to apply the corrent DC-bias to your input
OR
AC-couple your inputs by using capacitors.
For my experiments with capturing analog baseband video with LFRX I used
ac-coupling for both ground and signal line.
(using several uFarad capacitors, to create a frequency response from 10 Hz to
30 MHz)
If you DC-connect the ground from LFRX to real ground without adding a dc-bias
directly you will probably get nothing out of it.
Greetings,
Martin
>
> Is there a good frequency I should be able to pick up with am_rcv.py and
> a 20ft piece of wire?
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>