Roshan Baliga wrote:
Matt Ettus wrote:
> The rev 4 and newer USRPs have a clock generator chip that is
spec'ed to
take a signal as low as 150 mV p-p. However in my testing I found I
needed a voltage as high as 8 or 9dBm. 8dBm is about .8V, so that
should still work.
Sorry if this isn't re
Matt Ettus wrote:
> The rev 4 and newer USRPs have a clock generator chip that is
spec'ed to
take a signal as low as 150 mV p-p. However in my testing I found I
needed a voltage as high as 8 or 9dBm. 8dBm is about .8V, so that
should still work.
Sorry if this isn't relevant to everybody on
Roshan Baliga wrote:
Hans Glitsch wrote:
I just found this one on Digikey:
http://www.abracon.com/Oscillators/ASVTX11.pdf
I'm not an experienced hardware guy, but it looks like it would work
in the usrp. Please tell me if I'm wrong.
I believe the USRP needs a 3 Vpp clock in, and this TCXO
Hans Glitsch wrote:
I just found this one on Digikey:
http://www.abracon.com/Oscillators/ASVTX11.pdf
I'm not an experienced hardware guy, but it looks like it would work in
the usrp. Please tell me if I'm wrong.
I believe the USRP needs a 3 Vpp clock in, and this TCXO only outputs
0.8 Vpp.
On Thu, Mar 08, 2007 at 04:39:09PM -0800, Hans Glitsch wrote:
>
> >Eric wrote:
> >
> >Have you tried using oprofile to determine where the hot-spots are in
> >the code? http://oprofile.sf.net
> >
> >In some of our other code we've noticed that substantial time is being
> >consumed computing sin a
Eric wrote:
Have you tried using oprofile to determine where the hot-spots are in
the code? http://oprofile.sf.net
In some of our other code we've noticed that substantial time is being
consumed computing sin and cos in some NCOs. That's one of the next
places we're looking at addressing wit
On Thu, Mar 08, 2007 at 03:54:15PM -0800, Hans Glitsch wrote:
> Hi,
> Thanks for the replies.
>
> Yes, I have had it working with the rational resampler, but I'm trying to
> eliminate that block. I'm eventually going to use a very low power,
> fanless pc to run the software, so we're trying to
From: "Eric Blossom" <[EMAIL PROTECTED]>
To: "Hans Glitsch" <[EMAIL PROTECTED]>
Cc: "gnuradio mailing list"
Sent: Thursday, March 08, 2007 3:25 PM
Subject: Re: [Discuss-gnuradio] changing the vctcxo
On Thu, Mar 08, 2007 at 02:44:12PM -0800, Hans Glitsch w
On Thu, Mar 08, 2007 at 02:44:12PM -0800, Hans Glitsch wrote:
> Hello,
>
> I want to change the clock on the usrp. Anyone know of a mail order
> place that would have the right kind of vctcxo at 38.4MHz ? I tried
> Digikey and Mouser. no luck.
>
> Thanks,
> Hans
Not sure about where to get them
Hans Glitsch wrote:
I want to change the clock on the usrp. Anyone know of a mail order
place that would have the right kind of vctcxo at 38.4MHz ? I tried
Digikey and Mouser. no luck.
Based on the common frequency table here:
http://www.cardinalxtal.com/common-frequencies.htm
it doesn't l
Hello,
I want to change the clock on the usrp. Anyone know of a mail order place that
would have the right kind of vctcxo at 38.4MHz ? I tried Digikey and Mouser.
no luck.
Thanks,
Hans___
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