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RE: [Discuss-gnuradio] Run USRP at alternate clock frequency?

From: Whitaker, Brian
Subject: RE: [Discuss-gnuradio] Run USRP at alternate clock frequency?
Date: Fri, 31 Mar 2006 15:58:48 -0800

Clark -- I use a heat gun for this kind of rework. If you haven't seen one, it's essentially a 500degree hair dryer. If the board allows, you can reflow the whole thing on a hot plate (don't flinch when you pull the board off!)


Brian Whitaker, Maxim Wireless FAE

-----Original Message-----
From: address@hidden [mailto:address@hidden] On Behalf Of Clark Pope

Sent: Friday, March 31, 2006 3:52 PM
To: address@hidden; address@hidden
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Run USRP at alternate clock frequency?

I finally got my 44MHz oscillator in. Tried to remove the existing
oscillator but I got nowhere with my iron and copper braid. Can anyone
suggest a cheap tool that will allow me to get this surface mount oscillator


>From: Eric Blossom <address@hidden>
>To: Matt Ettus <address@hidden>
>CC: Clark Pope <address@hidden>, address@hidden
>Subject: Re: [Discuss-gnuradio] Run USRP at alternate clock frequency?
>Date: Fri, 10 Mar 2006 15:03:10 -0800
>On Fri, Mar 10, 2006 at 02:42:56PM -0800, Matt Ettus wrote:
> > Clark Pope wrote:
> > >
> >
> > You need a new crystal or an external oscillator.
> >
> > > 2. If I change over to 44 MHz will everything else still work?
> > > Especially the dbs and flex2400 boards?
> >
> > You will need to change the 64e6 in line 108 of the db_dbs_rx.py file in
> > gr-usrp to give the correct reference frequency.  Everything else will
> > work fine.
>I changed it to use fpga_master_clock_freq()

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