Suprin, Charles E. wrote:
> Matt,
>
> I had not seen your other post before I responded to the first one.
>
> How do you do a "receive at"? Looking at
> usrp2/host/apps/include/usrp2/usrp2.h, the only function I see is
> start_rx_streaming which does not have a timestamp in it.
>
> As for t
ter.
If I am missing something that could solve this more easily, let me know.
Charles
-Original Message-
From: Matt Ettus [mailto:m...@ettus.com]
Sent: Friday, February 13, 2009 2:52 PM
To: Suprin, Charles E.
Cc: Douglas Geiger; discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio
Suprin, Charles E. wrote:
Doug,
Working only on my single channel setup, what appears to happen is
that there is the time stamp for the first sample in the frame. The
frame alignment seems to remain a function of when the device was
turned on.
NO. Frame alignment is under explicit control fr
: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] USRP2 PPS and REF
Ok - so I have packets coming in from both USRP2's now, getting dumped
to their separate files.
My app prints out the timestamp of each frame that gets sent to the
copy handler: if my 1PPS source is working pro
Newman, Timothy wrote:
Couldn't you just tell the USRP's to start at a specific time to get
them to start in sync? Rather than in real-time telling them to start
immediately and having that lag.
Yes, you need to use the "receive at" functionality. The call to
receive on the host side takes
dio@gnu.org
> Subject: Re: [Discuss-gnuradio] USRP2 PPS and REF
>
>
> Ok - so I have packets coming in from both USRP2's now, getting
dumped
> to their separate files.
> My app prints out the timestamp of each frame that gets sent to the
> copy handler: if my 1PPS source
Ok - so I have packets coming in from both USRP2's now, getting dumped
to their separate files.
My app prints out the timestamp of each frame that gets sent to the
copy handler: if my 1PPS source is working properly, should the
timestamps coming out of the two USRP2's be identical?
Another quest
Johnathan Corgan wrote:
> On Tue, Feb 10, 2009 at 1:26 PM, Douglas Geiger
> wrote:
>
>> Ok, looking at the frames in wireshark, looking for the timestamps that
>> were sent to the copy handler, it looks like only the frames from 30:80
>> are being used, and they're being used twice (i.e. u2b->rx_
On Tue, Feb 10, 2009 at 1:26 PM, Douglas Geiger
wrote:
> Ok, looking at the frames in wireshark, looking for the timestamps that
> were sent to the copy handler, it looks like only the frames from 30:80
> are being used, and they're being used twice (i.e. u2b->rx_samples(0,
> handlerb.get()) got
Douglas Geiger wrote:
>
> This is with no 1PPS, no 10Mhz reference signal, and the antenna on
> 30:80 was removed (installed on 30:81). I'm going to pull up wireshark
> to compare the frames I'm getting from each USRP2.
> Doug
>
Ok, looking at the frames in wireshark, looking for the timestamps
Eric Blossom wrote:
>> Since I've now tried this a few times
>> doing things like: removing the antenna from one (and not the other),
>> moving them far apart, etc. - I'm fairly certain this is a software
>> problem, and not the correct results.
>
> OK. Just to be sure, are you explicitly specif
On Tue, Feb 10, 2009 at 10:48:18AM -0600, Douglas Geiger wrote:
> Eric Blossom wrote:
> >
> > You have to tell it to use them.
> >
> > Take a look in :
> >
> > config_mimo(MC_WE_LOCK_TO_SMA)
> > sync_to_pps()
> >
> > There are python bindings for these.
> > (Oops, looks like we're missing t
] On Behalf Of
Douglas Geiger
Sent: Tuesday, February 10, 2009 11:48 AM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] USRP2 PPS and REF
Eric Blossom wrote:
>
> Hi Charles,
>
> You have to tell it to use them.
>
> Take a look in :
>
> confi
Eric Blossom wrote:
>
> Hi Charles,
>
> You have to tell it to use them.
>
> Take a look in :
>
> config_mimo(MC_WE_LOCK_TO_SMA)
> sync_to_pps()
>
> There are python bindings for these.
> (Oops, looks like we're missing the python binding for config_mimo...)
> Are you using this from Pytho
On Mon, Feb 09, 2009 at 10:50:44AM -0500, Suprin, Charles E. wrote:
> Hello,
>
> I have hooked up the USRP2 to a PPS and a GPSDO 10MHz reference.
>
> Is there a way I can tell if the FPGA is seeing these signals and locking
> onto them?
>
> Charles
Hi Charles,
You have to tell it to use them.
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