This has never been clear to me!
What about the phase ambiguity due to the fractional-N VCO's, as Marcus has
mentioned?
This has to be calibrated out, yes/no?, but how?, unless after a retune you
then
TX a calibration sequence that you can correlate against and correct. But after
this, then,
This has never been clear to me!
What about the phase ambiguity due to the fractional-N VCO's, as Marcus has
mentioned?
This has to be calibrated out, yes/no?, but how?, unless after a retune you
then
TX a calibration sequence that you can correlate against and correct. But after
this, then
How about USRP2 and UHD?
Cheers,
Dave
- Original Message
From: Don Ward
To: Matt Dunstan ; discuss gnuradio
Sent: Mon, 1 November, 2010 1:28:26
Subject: Re: [Discuss-gnuradio] Does anybody have sucessfully installed
GNURadio
on Windows
Matt Dunstan wrote:
> OK, I really don't
What's the push button for?
Dave
- Original Message
From: Matt Ettus
To: Steve Mcmahon
Cc: GNR
Sent: Tue, 12 October, 2010 23:16:23
Subject: Re: [Discuss-gnuradio] differences between USRP2 rev 3 and rev 4 boards
On 10/12/2010 02:22 PM, Steve Mcmahon wrote:
> I am wondering what
This may also be helpful.
-Zotac ION Dual Core 1.6GHz Atom N330 Mini-ITX Board
-2x USRP2 Rev 3, 10MHz bandwidth each
-Netgear GigE Switch, the MB has only one port
-Seagate 1TB baracuda (5900 rpm I think)
-ext2 filesystem, Ubuntu 9.04
Using VRT branch code to just dump raw 16bit I&Q I was able
You may have done this already, but check that the network port is eth0, which
find_usrp's uses by default.
I had similar problem after inserting another network card, check
/etc/udev/rules.d/70-persistent-net.rules...
D.
- Original Message
From: Marcus D. Leech
To: discuss-gnuradi
Thanks John,
This is how I understood it, but I suppose my real question is (not being a dsp
expert), why would you want to do this?
I assumed that being a 26MHz clock, this would be ideal for GSM rate signals?
Cheers,
Dave
- Original Message
From: John Orlando
To: David Evans
Hi,
Probably a stupid question...
By connecting the BURX's 26MHz clock to the USRP2's 100MHz ref. input, as
described in the source, does this pull the mainboard clock to 26MHz, or does
it
just phase lock to it? i.e. if I collect samples with usrp2_rx_cfile, these
will
all be samples at 26MHz
: discuss-gnuradio@gnu.org
Sent: Wed, 18 August, 2010 20:26:38
Subject: Re: [Discuss-gnuradio] GRC+USRPx file sink problem
On 08/18/2010 01:41 PM, David Evans wrote:
> Hi,
>
> GRC Setup (used with RFX and WBX cards)...
>
> USRP1 ---to---> FFT Graphical sink (shows signal sp
Hi,
GRC Setup (used with RFX and WBX cards)...
USRP1 ---to---> FFT Graphical sink (shows signal spectrum as expected)
and ---to---> Complex to IShort -to> File Sink (signals are
dumped
to disk as expected)
USRP2 ---to---> FFT Graphical sink (shows signal spectrum as expected)
Hello,
Will BitShark be supported in UHD? Would it be easy to merge from GIT 3.3?
Dave
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Hi,
Just a few general querys...
How long does it take for an RFX card to tune and lock to a frequency, once a
set_freq command is issued?
Does it matter if the steps are small or large, ie a greater swing on the VCO?
Is there a way to tell if/when the VCO is locked, ie its tuned (could I monit
if I have two (or more) usrp2s, and I do a set_time_next_pps(), there is (or is
there?) a chance
that the pps could occur after the first call, so the second call will
set the second usrp a second later. I would need to know when there is a pps or
seconds transition prior to setup, then have on
edge
while (get_pps_level() == 1);
u1->set_time_next_pps(...); // We are guaranteed at least one second to issue
this to both usrp at once
u2->set_time_next_pps(...);
Cheers,
David
- Original Message
From: Josh Blum
To: David Evans
Sent: Sat, 22 May, 2010 17:37:32
Subject: R
Is it, or could it be possible to add a query method to get the PPS state
(something like u2->get_pps())?
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of code I've done already.
Cheers
- Original Message ----
From: Per Zetterberg
To: David Evans
Sent: Mon, 17 May, 2010 20:30:12
Subject: Re: [Discuss-gnuradio] USRP2 dropping data
David Evans wrote:
> Hi,
>
> setup...
> -2x USRP2s + GPS 10MHz reference + 1PPS
> -Single
Hi,
setup...
-2x USRP2s + GPS 10MHz reference + 1PPS
-Single GigE port, with USRPs on GigE switch
-Zotac H55-itx MB + i3 processor, so quite high end.
-VRT branch code. I also use PPS via DCD line to trigger when to load time on
next PPS, enable real time scheduling, ref to SMA, pps to SMA,
conf
Hi,
I want to sync two USRP2s, and currently trying to modify the VRT
rx_timed_samples...
usrp2::clock_config_t cc;
cc.ref_source = usrp2::clock_config_t::REF_INT;
cc.pps_polarity = usrp2::clock_config_t::PPS_NEG;
cc.pps_source = usrp2::clock_config_t::PPS_SMA;
cc.provide_ref_to_mimo = false;
Not sure about cheap-ish, but have a look at the Toradex Robin NanoCOM
SBC & Daisy daughterboard.
I have one, very compact, cheapish at under 300 Euros?, and a quick test
today with my USRP2, running the usrp rx samples program (the one in
host/apps!), I was able to capture complex samples w
I'll have to replace the chip anyway
Thanks again guys,
David
Matt Ettus wrote:
On 02/24/2010 09:42 AM, David Evans wrote:
Hi all,
Power output has significantly dropped, initially by 8dB, now much more.
My first thoughts are that the PA has failed, so is it possible to break
the t
Hi all,
Power output has significantly dropped, initially by 8dB, now much more.
My first thoughts are that the PA has failed, so is it possible to break
the transmitter...
- by prolonged transmitting at high power (i.e. setting it to/near maximum)?
- using a mismatched antenna?
- mismatching
Hi,
I am using 2 x (USRP1 + RFX900) for simple transceiver test (USRP1 to
USRP2 back to USRP1), and can successfully transmit OOK packet (preamble
+ payload) and receive response.
However, if I enable ATR on the sender, the received response by the
sender is corrupted (I successfully correla
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