Hi Everyone,
There has been a flurry of activity on the USRP side of the house.
The new style "Auto T/R Switching" code is in the verilog and host
side code. I finally figured out how to get the daughterboard
destructors called. Now we can be sure that the transmitter is off
when programs exit ;
Matt Ettus wrote:
The close in noise is from the COMMON reference, so there is nothing to
cancel, it is perfect. It is the further out phase noise components
which are not the same between the 2 PLLs, since those components are
from the individual VCOs. These integrate out fairly quickly, and
>
> This raises a question I've always had about phase-coherence of PLL
> oscillators that use a common
> clock source. Will they be coherent "enough" for things like
> astronomical interferometry?
Yes.
> The individual PLLs will still have "close in" phase noise components
> that are unrelat
Robert McGwier wrote:
This is not quite right. The DIFFERENT oscillators on the USRP boards
have different frequencies and thus constantly changing phase angle
with respect to each other and with probability 1, the frequencies of
both oscillators will change with changing temp, air flow, etc.
On Tue, 6 Dec 2005 16:04:07 -0800, Eric Blossom [EMAIL PROTECTED] wrote
To: [EMAIL PROTECTED], discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] gmsk error / log files and octave
On Tue, Dec 06, 2005 at 06:16:32PM -0500, [EMAIL PROTECTED] wrote:
> Probably the easiest thing is to modify gm
On Wed, Dec 07, 2005 at 08:39:01PM +, sudhindra aithal kota wrote:
> Hi,
> In my mail I have mentioned that I did try with
> frequencies greater than 100Khz. But the behaviour was
> the same as I had originally reported.
>
> Regards
> Sudhindra
Will your source drive 50 ohms?
___
This is not quite right. The DIFFERENT oscillators on the USRP boards
have different frequencies and thus constantly changing phase angle with
respect to each other and with probability 1, the frequencies of both
oscillators will change with changing temp, air flow, etc.. The only
way to avoi
Hi,
In my mail I have mentioned that I did try with
frequencies greater than 100Khz. But the behaviour was
the same as I had originally reported.
Regards
Sudhindra
--- Lamar Owen <[EMAIL PROTECTED]> wrote:
> On Wednesday 07 December 2005 13:16, sudhindra
> aithal kota wrote:
> > Hi,
> > I am
On Wednesday 07 December 2005 13:16, sudhindra aithal kota wrote:
> Hi,
> I am still stuck with this problem.Can anyone please
> tell me how to solve this?
Eric Blossom answered the question originally on 11/15; did you receive his
reply?
In a nutshell, the USRP Basic RX input transformer is on
Hi,
I am still stuck with this problem.Can anyone please
tell me how to solve this?
Regards
Sudhindra
Hi,
Sorry for the previous mail. Totally out of context.
I gave a square wave input direct from a signal
generator and the behaviour of usrp_oscope was the
same as I had explained before. I
On Wed, Dec 07, 2005 at 02:51:58AM -0500, Blue Sky wrote:
> I am trying to build a AM receiver by using USRP. I did setup the IF
> frequency to 1.43 MHz by using set_rx_freq. I was sending a 1 Khz signal 90%
> modulated at 1.43 MHz carrier. I should get something from the USRP output
> just the 1 K
COMINT wrote:
> Hi Martin
>
> Caught your post.
>
> Are you using the mutiple 4 channel rx system with phase sync for RDFing?
At the moment I am not using it for anything else as testing ;-)
You could however use this for RDFing or passive-radar or things like that.
Greetings,
Martin
__
Elaine Garbarine wrote:
> Martin,
>
> I appreciate your response. My application will indeed need full phase
> coherency. Could you tell me a bit more about how you achieved this? I'm
> curious to know to what level you've been able to achieve phase
> synchronization? More importantly, are an
David I. Emery wrote:
This is something called DiSEqC control and is documented in
various ETSI specs available on the web (you have to register an account
with ETSI to get copies) There are several generations of this
protocol in use, all of which use superimposed 22 khz tones on the
Martin,
I appreciate your response. My application will indeed need full phase
coherency. Could you tell me a bit more about how you achieved this? I'm
curious to know to what level you've been able to achieve phase
synchronization? More importantly, are any phase
differences that do exist be
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