[mailto:m...@ettus.com]
Skickat: den 14 maj 2009 19:07
Till: Ulrika Uppman
Kopia: discuss-gnuradio@gnu.org
Ämne: Re: [Discuss-gnuradio] Syncrinization of two USRP2s
Ulrika Uppman wrote:
Hi,
We've set up a test comparing a recieved white noise signal recieved
by two usrp2 recievers. The two
How are you starting the streaming samples from the two USRP2's? The
default start_rx_streaming call (and thus, the standard usrp2_source block)
just starts streaming when it receives the command from the host PC. So any
delay between when each USRP2 receives the command over the gig-E interface
Från: discuss-gnuradio-bounces+patrik.eliardsson=foi...@gnu.org
[mailto:discuss-gnuradio-bounces+patrik.eliardsson=foi...@gnu.org] För Douglas
Geiger
Skickat: den 8 juni 2009 15:08
Till: Ulrika Uppman
Kopia: discuss-gnuradio@gnu.org
Ämne: Re: [Discuss-gnuradio] Syncrinization
Hi,
We've set up a test comparing a recieved white noise signal recieved by two
usrp2 recievers. The two receivers were clocked (1PPS and refclk) by a GPS
diciplined OCXO which outpus a 1PPS signal which is phase locked to the 10 MHz
reference. The daughterboard was the RFX400 configured with
I was just recently fighting with this, and Matt told me that I have
to modify the firmware to get the USRP2 to lock (or at least this is
the easiest way to get the lock). Have you modified the firmware yet?
You need to add
clocks_mimo_config(MC_WE_LOCK_TO_SMA);
in the main() function of txrx.c
guess. The
firmware used is the built version of 10766.
/Ulrika
-Ursprungligt meddelande-
Från: Juha Vierinen [mailto:jvier...@gmail.com]
Skickat: den 14 maj 2009 12:39
Till: Ulrika Uppman
Kopia: discuss-gnuradio@gnu.org
Ämne: Re: [Discuss-gnuradio] Syncrinization of two USRP2s
I
On Thu, May 14, 2009 at 4:44 AM, Ulrika Uppman ulrika.upp...@foi.se wrote:
We do call config_mimo(MC_WE_LOCK_TO_SMA) when we set up the usrp2 (before
the start of receiving). Is clocks_mimo_config() different from config_mimo()?
This is correct. The host driver has the function call to
We do call config_mimo(MC_WE_LOCK_TO_SMA) when we set up the usrp2 (before
the start of receiving). Is clocks_mimo_config() different from
config_mimo()?
This is correct. The host driver has the function call to cause the
USRP2 clock to synchronize with an external reference on the SMA,
On Thu, May 14, 2009 at 7:32 AM, Juha Vierinen jvier...@gmail.com wrote:
Ok. I managed to get a lock only after modifying the firmware. Is
there some example for doing this on the host, I'm just wondering what
I did wrong.
Calling:
-config_mimo(MC_WE_LOCK_TO_SMA)
...from your host code
Ulrika Uppman wrote:
Hi,
We've set up a test comparing a recieved white noise signal recieved
by two usrp2 recievers. The two receivers were clocked (1PPS and
refclk) by a GPS diciplined OCXO which outpus a 1PPS signal which is
phase locked to the 10 MHz reference. The daughterboard was the
10 matches
Mail list logo
