On 06/02/2014 04:13 AM, Ron Economos wrote:
If the rolloff parameter is zero, the block does not
do any pulse shaping. The rolloff parameter is in
symbols, and must be at least 2 and less than or
equal to CP length.
Thanks Ron, that's correct -- just a technicality: The rolloff is in
*
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Original Message
From: Marcus Müller marcus.muel...@ettus.com
Sent: June 2, 2014 12:31:49 PM CEST
To: Riana Risnawati riana.risnawati180...@gmail.com,
discuss-gnura...@lists.gnu.org
Subject: Re: [USRP-users] problem with my rx daughterboard
Hi Riana,
It looks like you were
Dear All,
I am using N210s with XCVR2450s. I have successfully performed 2x1
transmission, but not I am not transmitting the same stream over both
transmitters. One stream is constantly available, and is no problem. The second
stream only starts later on, and thus it is blocking the flow
On 06/02/2014 12:34 PM, David Halls wrote:
I am using N210s with XCVR2450s. I have successfully performed 2x1
transmission, but not I am not transmitting the same stream over both
transmitters. One stream is constantly available, and is no problem. The
second stream only starts later on, and
Hi Martin,
How's it going?
I am using a single UHD sink, with 2 motherboards specified, in order that the
transmission is sync'd.
D
From: discuss-gnuradio-bounces+david.halls=toshiba-trel@gnu.org
Hi David,
Generally, this sounds like in principle, your application looks like
(nb: not an actual GR flowgraph)
+-+ +--+
| sample source a || USRP |--- [USRP1]
+-+ | |
| sink |
Hi Marcus,
Yes, your diagram represents what I am trying to achieve.
Using two sinks would be really nice! But I have had some problems with
achieving sync using time stamps (where as using one UHD sink is very
straightforward). For example, how do I obtain the current time from the
transmit
Hi David,
easiest way to achieve coherence on both USRP would be a MIMO cable,
or GPSDO's.
That being said, depending on your definition of sync, just setting
the time at both USRPs would little to some little, yet existent error.
This error should also occur when using the two USRPs with the
Hi Marcus,
Thanks - I require sample level timing sync. Using the external sync to get
accurate LO frequencies is great, but not sufficient. Using a single UHD block
with 2 motherboards gives me sample-level sync.
Thanks for the code but how are the uhd, and usrp_sink0, usrp_sink0 objects
Hi All, Marcus
I have created a simple block (not yet finished) to create zeros. How do I get
this to be scheduled if there are no items at the input? If I connect a source
to it, then it works, if I connect my 'sample source b' to it which has no
items at time zero, then the block is not
Hi David,
On 02.06.2014 18:24, David Halls wrote:
Hi Marcus,
Thanks - I require sample level timing sync. Using the external sync to get
accurate LO frequencies is great, but not sufficient. Using a single UHD
block with 2 motherboards gives me sample-level sync.
That will only be true if
Hi Activecat,
Thanks for providing the flowgraph_01.grc example. Now I understand that
how to set sample rate of a customized block. For others, sample rate of a
customized block can be initialized in the make() function of the block.
Details of setting the sample rate can be found in Activecat's
Hi David,
you're right, the scheduler will only call your block when out- or input
buffer situation have changed, and there's no elegant way to coerce that.
However, given a sink that consumes with a constant continous rate, that
will never be a problem for a longer time.
Greetings,
Marcus
On
Hello everyone,
Apologies for the delay in brining the update. There was a confusion with
the hardware from TI and I was traveling the week GSoC started. Here are
some brief points, for more detailed info please consult the wiki page:
http://gnuradio.org/redmine/projects/gnuradio/wiki/Keystone2
Hi Marcus,
I'm not sure if understand correctly then, how would you suggest it is possible
to implement your suggestion
'a block that (rate limitedly) produces zero-samples, unless data comes in on a
message port?'
...My new block is connected to the UHD sink - so this should consume the
Dear Sirs,
To grasp a better understanding of how the scheduler works, I try to look
into its source code.
The files like scheduler.cc and scheduler.h don't contain much code.
The single_threaded_scheduler.cc contains part of the codes, I am looking
for files like this.
Could you suggest to me
On Mon, Jun 2, 2014 at 10:29 PM, Activecat active...@gmail.com wrote:
Could you suggest to me which files I shall go through in sequence?
Activecat,
You can start with Tom's presentation about the scheduler located on his
blog
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