Yes I would really like to know not to guess, in that case I could probably
be able to solve it. It is pretty like this: by disconnecting 10.7 MHz
cable the spike disappeared so I said ok it doesn't come from inside USRP,
but rather through coax cable. Since cable is shielded I assume it even
goes
First of all you need to _know_ (not _guess_), where it comes from, where it
goes to…
Ralph.
From: Nemanja Savic [mailto:vlasi...@gmail.com]
Sent: Monday, 16 December, 2013 16:48
To: Ralph A. Schmid, dk5ras
Cc: Patrik Tast; usrp-us...@lists.ettus.com; GNURadio Discussion List
Subject: Re:
Hi,
Try a 1/4 shorted stub at 434 MHz (at the antenna).
Patrik (who said many times *not my fault* but usually is...)
On Mon, 2013-12-16 at 16:26 +0100, Nemanja Savic wrote:
> Hi,
>
>
> i don't understand what can I do in this way with balun. Antenna is
> matched very well I think, since I cop
Well, maybe I can use spectrum analyser with proper antenna, but what can I
achieve with that. If I see peak, I still have a problem to attenuate it.
On Mon, Dec 16, 2013 at 4:36 PM, Ralph A. Schmid, dk5ras
wrote:
> Take a handheld scanner or a UHF walkie talkie, tune it to the LO
> frequency, u
Take a handheld scanner or a UHF walkie talkie, tune it to the LO frequency,
use a paperclip or some similar 2cm piece of wire as antenna, and start
sniffing with this improvised probe for the leakage.
Ralph.
From: USRP-users [mailto:usrp-users-boun...@lists.ettus.com] On Behalf Of
Nem
Hi,
i don't understand what can I do in this way with balun. Antenna is matched
very well I think, since I copied reference design from TI.
I am sure that spike comes from WBX LO because when I change center
frequency the spike also shifts. I'll remind about the configuration again:
USRP1 with WBX
Hi,
Try finding ferrites for your frequency (11 MHz) and google on BalUn
(balanced to unbalanced), http://en.wikipedia.org/wiki/Balun
You could also do it with COAX, impedance match using the Smith Chart,
if your antenna impedance is known eg
http://en.wikipedia.org/wiki/Smith_chart
Very usual i
