Dear gurus,
I am learning gnuradio Message Passing feature, but couldn't get desirable
result.
The Message seems published successfully, but not subscribed by the Message
receiver.
How to correct the error ..?
The message sender block:
// constructor
We must not forget that each device has its own USB connection.
One reason that getting all in sync on a ' per sample' base must be
impossible.
Still a multi user system like the websdr can achieved by overlapping the
channels and let the software decide what channel the user's choice fits.
What about the passive radar - didn't the author daisy chain the clocks of
several RTLSDR?
Regards,
Vanush
On Wed, May 14, 2014 at 4:31 PM, Imre techn...@livep2000.nl wrote:
We must not forget that each device has its own USB connection.
One reason that getting all in sync on a ' per sample'
On 14.05.2014 08:11, Activecat wrote:
Dear gurus,
I am learning gnuradio Message Passing feature, but couldn't get
desirable result.
The Message seems published successfully, but not subscribed by the
Message receiver.
How to correct the error ..?
Just to make sure: You did connect the ports
On 14.05.2014 04:36, Ron Economos wrote:
If you're sending packets, then Length Tag Key should be
set to the packet length you're using. If you're sending
a stream (like DVB-T), then this field is not used (and
left blank).
It needs an empty string, in this case.
The OFDM cyclic prefixer is
On 13.05.2014 19:27, Mostafa Alizadeh wrote:
Hi,
I recently encountered a problem with the large number of items. I wanna
pass about 75000 items from one block to the another. I thought that I
could do this with setting the min of output items in the constructor of
the block but I got the
I am confused about the terms full duplex and half duplex in context of
USRP...If i am using two antennas attached on the same channel on B210(one
on TX/RX and other on RX2).I am Rxing through one antenna and
retransmitting the signal with the other antenna..Am i operating on full
duplex or half
Full duplex implies simultaneous transmission and reception, almost always
on different frequencies. In the cellular world this is called frequency
division duplexing, or FDD. Full duplex on a USRP implies transmitting on
one connector (TX/RX) and receiving on the other (RX2).
Half duplex means
Thank you Matt!
On Wed, May 14, 2014 at 2:13 PM, Matt Ettus m...@ettus.com wrote:
Full duplex implies simultaneous transmission and reception, almost always
on different frequencies. In the cellular world this is called frequency
division duplexing, or FDD. Full duplex on a USRP implies
On Wed, May 14, 2014 at 4:26 PM, Martin Braun martin.br...@ettus.comwrote:
On 14.05.2014 08:11, Activecat wrote:
Dear gurus,
I am learning gnuradio Message Passing feature, but couldn't get
desirable result.
The Message seems published successfully, but not subscribed by the
Message
On 14.05.2014 11:14, Activecat wrote:
Both blocks (message sender block, message receiver block) are source
blocks, both are directly connected to the inputs of a divider blocks,
i.e. the message receiver block is not at the downstream of the message
sender block. I guess this is ok because
Hi Martin,
Yes you're right, 75000 items isn't so large! But after passing these items
through an encoder, the number of items becomes about 227000!! That's a big
number!
However, I skewed over the problem and till now I've reached to this point
that I may use 3 or 4 inputs-ouputs ports per block
It's better to say in this way: *how could I use stop(), start(), lock(),
unlock() of the topblock methods? Is there any example of them?*
Thanks,
On Wed, May 14, 2014 at 1:20 PM, Martin Braun martin.br...@ettus.comwrote:
On 13.05.2014 15:56, Mostafa Alizadeh wrote:
Thank you martin,
I
On Wed, May 14, 2014 at 5:26 PM, Martin Braun martin.br...@ettus.comwrote:
There's no msg_connect() call here -- that would be your problem.
M
I build the flowgraph using GRC. How to make correction?
The complete top_block.py is as follows.
#!/usr/bin/env python
Hi,
There's no msg_connect() call here -- that would be your problem.
M
I build the flowgraph using GRC. How to make correction?
The complete top_block.py is as follows.
Did you define the message port in the .grc XML file for your blocks ?
Something like :
sink
nameportname/name
I try to get B200 to work with OpenBTS and I see some frequency offset in the
internal reference clock.
Does anyone know if the numbers I get from kalibrate, could cause phones not to
be able to register to OpenBTS?
What is the quickest and the cheapest way fix a problem with a clock? I
think
On 14.05.2014 11:35, Activecat wrote:
On Wed, May 14, 2014 at 5:26 PM, Martin Braun martin.br...@ettus.com
mailto:martin.br...@ettus.com wrote:
There's no msg_connect() call here -- that would be your problem.
M
I build the flowgraph using GRC. How to make correction?
To correct
On 14.05.2014 12:12, Robert Light wrote:
I try to get B200 to work with OpenBTS and I see some frequency offset in the
internal reference clock.
Does anyone know if the numbers I get from kalibrate, could cause phones not to
be able to register to OpenBTS?
What is the quickest and the
On Wed, May 14, 2014 at 5:50 PM, Sylvain Munaut 246...@gmail.com wrote:
Did you define the message port in the .grc XML file for your blocks ?
Something like :
sink
nameportname/name
typemessage/type
optional1/optional
/sink
Then they should show as message port in the
On Wed, May 14, 2014 at 6:18 PM, Activecat active...@gmail.com wrote:
On Wed, May 14, 2014 at 5:50 PM, Sylvain Munaut 246...@gmail.com wrote:
Did you define the message port in the .grc XML file for your blocks ?
Something like :
sink
nameportname/name
typemessage/type
On 05/14/2014 12:29 PM, Activecat wrote:
I have then tested few combinations, it seems that a source block cannot
have a message sink port.
Is there such a restriction ..?
Not that I know of...
?xml version='1.0' encoding='ASCII'?
block
nameTest/name
On Wed, May 14, 2014 at 6:49 PM, Koslowski, Sebastian (CEL)
sebastian.koslow...@kit.edu wrote:
On 05/14/2014 12:29 PM, Activecat wrote:
I have then tested few combinations, it seems that a source block cannot
have a message sink port.
Is there such a restriction ..?
Not that I know
Hi,
I
think B200 has TCVCXO, so is there a way to write some tuning voltage offset
to
correct the frequency?
There is no way to trim the TCVCXO manually. It's included in the loop
of a PLL for external locking but you can't control it directly.
It seems that manual control was considered
On Mon, May 12, 2014 at 2:45 AM, Mostafa Alizadeh m.alizade...@gmail.comwrote:
Hi Nemanja,
I think the best possible way is to connect the trigger to the block as a
message. To to that, you need to write a file_sink block for yourself
again, for instance named my_file_sink.
The main
On Wed, May 14, 2014 at 7:06 AM, Activecat active...@gmail.com wrote:
On Wed, May 14, 2014 at 6:49 PM, Koslowski, Sebastian (CEL)
sebastian.koslow...@kit.edu wrote:
On 05/14/2014 12:29 PM, Activecat wrote:
I have then tested few combinations, it seems that a source block cannot
have a
On Tue, May 13, 2014 at 11:11 AM, Irfan Ullah irfanlums...@gmail.comwrote:
Hi all,
I have a problem here with polyphase clock synchronization block when i
set the output samples per symbol to one the constellation have much more
ISI and noise and when output sps value is 2 the constellation
On Wed, May 14, 2014 at 6:16 AM, Martin Braun martin.br...@ettus.com wrote:
On 14.05.2014 12:12, Robert Light wrote:
UHD Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 0.270833 MSps
Actual sample rate: 0.271186 MSps
Robert,
as long as you
On 05/14/2014 11:44 AM, Tom Tsou wrote:
On Wed, May 14, 2014 at 6:16 AM, Martin Braunmartin.br...@ettus.com wrote:
On 14.05.2014 12:12, Robert Light wrote:
UHD Warning:
The hardware does not support the requested RX sample rate:
Target sample rate: 0.270833 MSps
Actual sample
2 kHz offset is within tolerance for 1900 MHz. Locking to a stable 10
MHz reference, generally an OCXO or GPSDO, is the recommended
approach.
I applied external 10MHz reference, the best I had at hand.
Now kalibrate says I have about 200Hz offset at 900MHz and 420Hz at 1800MHz,
but phones
Hi,
Thanks Mr. Economos and Mr. Braun,
I left this parameter in blank (I guess this is the same as an empty
string), it seems that it is working now.
Actually I am trying to modulate ISDB-T data stream. I am working with
vectors, instead of data stream.
Thanks again.
2014-05-14 5:28
On 05/14/2014 01:12 PM, Robert Light wrote:
2 kHz offset is within tolerance for 1900 MHz. Locking to a stable 10
MHz reference, generally an OCXO or GPSDO, is the recommended
approach.
I applied external 10MHz reference, the best I had at hand.
Now kalibrate says I have about 200Hz offset at
Hi all,
It's been a while since we've had a VOLK working group call, and I
think there's some things worth discussing that have built up. If
you're interested in attending put in available hours here:
http://whenisgood.net/gnuradio/volk/june14
In the next day or two when I see results from the
If you haven't already, you may want to take a look
at this GnuRadio DVB-T implementation.
https://github.com/BogdanDIA/gr-dvbt
Ron
On 5/14/2014 1:50 PM, Yuri P.M wrote:
Hi,
Thanks Mr. Economos and Mr. Braun,
I left this parameter in blank (I guess this is the same as an empty
string), it
33 matches
Mail list logo
