Thanks Jason,
Sorry, I told you wrong reference clock. I have used 10MHz reference clocks
for the test again, and I still got the same results as the previous post.
Could you please give me some suggestions about the problem?
Cheers,
Hongliang
Jason Abele wrote:
>
>> I used a signal generator
> I used a signal generator and a spliter to provide two identical 100MHz ref.
> clocks for the boards.
The ref clock needs to be 10MHz rather than 100MHz
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Dear Jason and Josh,
Thanks very much for your reply. I followed your instructions and use the
UHD MIMO Sink and Source again. They should be synchronised now.
First, I transmitted a constant and observe the received signal. The
following figure is my flow graph of GRC:
http://old.nabble.com/
I know that is a strange interface, we will put an option to use
external ref clock in an update coming soon to git repositories near
you.
OK, i pushed that change. Update your uhd and gr-uhd.
Also, front panel led E is an indicator of external ref lock:
http://www.ettus.com/uhd_docs/manual/
> Why do I receive a sine wave when I transmit a constant?
Probably because the 100MHz reference clocks of your two USRP2s are
slightly different
Here are a few suggestions for being sure that you are locking to your
10MHz reference clock:
If you have not modified the generated python code from
Dear Marcus Leech,
Thanks very much for your response.
I use RFX2400 daughterboards and their TX/RX ports.
A attenuator is added between the transmitter and receiver boards now. And
to simplify the test, I use a constant source at the transmitter side.
Here is my GRC flow graph:
http://old.na
On 10/27/2010 02:11 PM, Hongliang Zhang wrote:
> Hi everyone,
>
> I made a test for UHD blocks today, and I found a problem as follows:
>
> I take two USRP2 boards for my test. One is used as transmiter and the other
> board is set to be receiver.And I use UHD Simple Sink and UHD Simple Source
> bl
Hi everyone,
I made a test for UHD blocks today, and I found a problem as follows:
I take two USRP2 boards for my test. One is used as transmiter and the other
board is set to be receiver.And I use UHD Simple Sink and UHD Simple Source
blocks for transmiting and receiving respectively.
samplin
