Hi guys,
I am trying to analyze the functionality of each of the blocks in the dbpsk
mod/demod when I noticed the following behavior.
The high level modulator flow control is as | Symbols |-> | RRC filter |
-> |amplifier | -> channel
and that for the demodulator is channel -> | Pr
On Mon, Aug 13, 2007 at 10:52:54AM -0400, Vijay Ramasami wrote:
> Hi,
>
> I have a couple of questions:
>
> 1. Does the US digital cable system follow the DVB-C standard (or one
> of its annexes) ? Is there any information (website) on the typical
> symbol rates, bandwidths (I am guessing approx
On Mon, Aug 13, 2007 at 03:22:23PM -0400, Zhuocheng Yang wrote:
> What about writing to normal registers? We are not interested in
> writing to I2C or SPI right now. We just want to write to FPGA
> registers.
Understood. The registers are defined in verilog using either
setting_reg or setting_re
Does anyone have an example application that grabs data from the USRP
(say Basic RX) and is entirely in c++? I don't need GR blocks, just the
bits please.
Thanks,
Chris
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Hi,
I have downloaded rfx400 pcb from
http://gnuradio.org/svn/usrp-hw/trunk/rfx/pcb/
,but gEda pcb gives "illegal fileformat" error. I'm aware that usrp pcb is
not available yet.
but ettus says that "all of daughterboard schematics and layout can be found
in the usrp-hw repository" in their web
Hi Matt,
the filter described for the RFX900
is just present on the rx side right?
"The RFX900 comes with a 902-928 MHz ISM-band filter installed for
filtering strong out-of-band signals"
the board just allows us to transmit over the full 750 - 1050 MHz range
right?
is a transmitted signal band
On Mon, Aug 13, 2007 at 02:01:05PM -0400, George Nychis wrote:
> Okay, so we're trying to get read/write registers to work correctly, and
> we're trying to understand how a register read/write currently works
> using the following methods:
> _write_fpga_reg()
> _write_oe()
If you trace throu
Okay, so we're trying to get read/write registers to work correctly, and
we're trying to understand how a register read/write currently works
using the following methods:
_write_fpga_reg()
_write_oe()
We are monitoring the serial I/O enable signal using a logic analyzer
and writing to regi
Hi,
Thanks for your response. I would still like an answer to this question:
Q1: If I use a usrp_rx_cfile.py to record data, and my app never reports
> "Ou" on the console, have all the bits been written to disk?
usrp_rx_cfile.py is known to work ;)
No doubt about it, but if the hard dri
Hi, Eric and Johnathan
Thank you guys for the quick answer. I have done some tests with my code and
got the following observation: I used a low-pass filter in the processing
chain, if the decimation rate is set to 1, then fg.run() can return; if the
decimation rate is set to any other integers, fg
I reinstalled the trunk version of GNU Radio, and I was able to successfully
burn the RFX 2400 to MIMO A. The problem I have now is that I cannot seem to
get the daughterboard to tune on receive in either a Rev 3 USRP or a Rev 4
USRP. I've verified that it is reporting MIMO A in the USRP Diagn
Hi,
I have a couple of questions:
1. Does the US digital cable system follow the DVB-C standard (or one
of its annexes) ? Is there any information (website) on the typical
symbol rates, bandwidths (I am guessing approx 6 MHz), used ?
2. Has anyone successfully captured (preferably unencrypted) d
On Fri, Aug 10, 2007 at 07:41:04PM +0200, Christian Sokolowski wrote:
class _queue_watcher_thread(_threading.Thread):
def __init__(self, rcvd_pktq, callback):
_threading.Thread.__init__(self)
self.setDaemon(1)
self.rcvd_pktq = rcvd_pktq
Hello,
while testing my own stuff this error occurs:
usrp_open_interface:usb_claim_interface: failed interface 1
could not claim interface 1: Device or resource busy
usrp_basic_tx: can't open tx interface
Traceback (most recent call last):
File "atsctransmitter.py", line 145, in
main()
F
On Wed, Aug 08, 2007 at 05:10:12PM -0400, Don Ward wrote:
> - Original Message -
> From: "Reid N Kleckner" <[EMAIL PROTECTED]>
> To: "Don Ward" <[EMAIL PROTECTED]>
> Cc:
> Sent: Wednesday, August 08, 2007 4:33 PM
> Subject: SVN Compile Error Under Cygwin: Omnithread Stuff
>
>
> >So, tha
On Thu, Aug 09, 2007 at 09:32:56PM -0400, Dawei Shen wrote:
> Hey Guys
>
> I used gr.head() as my source, so I assumed fg.run() should be able to
> return, but it doesn't. Anybody has any idea which could be the reason? Here
> is the error message if I press ctrl+C to stop the program.
It should
On Thu, Aug 09, 2007 at 04:07:28PM -0700, Jeffrey Ung wrote:
> Hi everyone,
>
> I'm still quite new to SDR and GNU Radio and I'm not sure if something
> like this already exists. I want to send a jpeg image through a USRP,
> this signal modulated into dbpsk, and transmitted via a FLEX400
> daught
On Fri, Aug 10, 2007 at 07:41:04PM +0200, Christian Sokolowski wrote:
> Hi all,
>
> the receiver of a point-to-point communication system is causing some memory
> trouble.
>
> rx_graph() architecture:
> usrp.board - some signal processing blocks - packet sink
>
> Arriving packets are fed t
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