[Discuss-gnuradio] SDR Books
Hi Community, Bellow are some SDR books and articles. Hope They are useful. http://rapidshare.com/files/70781770/Telecommunication_Breakdown_-_Concepts_of_Communication_Transmitted_via_Software-Defined_Radio.pdf http://rapidshare.com/files/70773907/Software_Radio_Architecture.pdf http://rapidshare.com/files/70767394/Simulation_and_Software_Radio_for_Mobile_Communications.pdf http://rapidshare.com/files/70763178/Software_Defined_Radio_for_3G.pdf http://rapidshare.com/files/70761692/P.B.Kenington_-_RF_And_Baseband_Techniques_for_Software_Defined_Radio.pdf http://rapidshare.com/files/70759139/Software_Defined_Radio.pdf http://rapidshare.com/files/70757976/Software_Defined_Radio_-_Enabling_Technologies.pdf http://rapidshare.com/files/70756891/Software_Defined_Radio_-_Origins__Drivers___Int_l_Perspectives.pdf http://rapidshare.com/files/70756212/SDR_in_Direction_Finding_RFDesign_0105.pdf http://rapidshare.com/files/70754651/FPGA_in_software_defined_radio.pdf http://rapidshare.com/files/70754388/Error_Control_Coding_In_Software_Radios_-_An_Fpga_Ieee-Usaf.pdf http://rapidshare.com/files/70754224/Digital_Receiver_Handbook_Basics_of_Software_Radio.pdf http://rapidshare.com/files/70754058/Channelization_Paper_SDR_forum.pdf Regards, Firas -- View this message in context: http://www.nabble.com/SDR-Books-tf4842282.html#a13853723 Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] A simple question for installing Utilities and Third-Party Libraries
Hi: A simple question, but I don't know. Where is the Utilities and Third-Party Libraries packages I can select in the Cygwin? Thanks very mach. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] SDR Books
Hi, I have received some complains about copyrights, links removed. Sorry. Firas Firas A. wrote: > > Hi Community, > > Bellow are some SDR books and articles. Hope They are useful. > > http://rapidshare.com/files/70781770/Telecommunication_Breakdown_-_Concepts_of_Communication_Transmitted_via_Software-Defined_Radio.pdf > > http://rapidshare.com/files/70773907/Software_Radio_Architecture.pdf > > http://rapidshare.com/files/70767394/Simulation_and_Software_Radio_for_Mobile_Communications.pdf > > http://rapidshare.com/files/70763178/Software_Defined_Radio_for_3G.pdf > > http://rapidshare.com/files/70761692/P.B.Kenington_-_RF_And_Baseband_Techniques_for_Software_Defined_Radio.pdf > > http://rapidshare.com/files/70759139/Software_Defined_Radio.pdf > > http://rapidshare.com/files/70757976/Software_Defined_Radio_-_Enabling_Technologies.pdf > > http://rapidshare.com/files/70756891/Software_Defined_Radio_-_Origins__Drivers___Int_l_Perspectives.pdf > > http://rapidshare.com/files/70756212/SDR_in_Direction_Finding_RFDesign_0105.pdf > > http://rapidshare.com/files/70754651/FPGA_in_software_defined_radio.pdf > > http://rapidshare.com/files/70754388/Error_Control_Coding_In_Software_Radios_-_An_Fpga_Ieee-Usaf.pdf > > http://rapidshare.com/files/70754224/Digital_Receiver_Handbook_Basics_of_Software_Radio.pdf > > http://rapidshare.com/files/70754058/Channelization_Paper_SDR_forum.pdf > > > Regards, > > Firas > -- View this message in context: http://www.nabble.com/SDR-Books-tf4842282.html#a13855275 Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] A simple question for installing Utilities andThird-Party Libraries
From: "JackyYang" <[EMAIL PROTECTED]> Sent: Tuesday, November 20, 2007 4:39 AM A simple question, but I don't know. Where is the Utilities and Third-Party Libraries packages I can select in the Cygwin? http://www.gnuradio.org/trac/wiki/CygwinGettingStarted attempts to explain this; look at the section "Using setup.exe". ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] SDR Books
Hi, I did some internet search, and found : 1) The following two books/articles are publicly available at pentek web site : http://www.pentek.com/products/Literature.cfm#Handbook a) FPGA_in_software_defined_radio.pdf b) Digital_Receiver_Handbook_Basics_of_Software_Radio.pdf 2) The following book/article are publicly available at: http://www.spectrumsignal.com/channel_techniques/Channelization_Paper_SDR_forum.pdf a) Channelization_Paper_SDR_forum.pdf 3) The following book/article are available at: http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/98/17080/00788213.pdf&arnumber=788213 a) Error control coding in software radios: an FPGA approach 4) The following book/article are publicly available at: http://www.spectrumsignal.com/publications/SDR_in_Direction_Finding_RFDesign_0105.pdf a) SDR_in_Direction_Finding_RFDesign_0105.pdf Regards, Firas Firas A. wrote: > > Hi, > > I have received some complains about copyrights, links removed. Sorry. > > Firas > > > Firas A. wrote: >> >> Hi Community, >> >> Bellow are some SDR books and articles. Hope They are useful. >> >> http://rapidshare.com/files/70781770/Telecommunication_Breakdown_-_Concepts_of_Communication_Transmitted_via_Software-Defined_Radio.pdf >> >> http://rapidshare.com/files/70773907/Software_Radio_Architecture.pdf >> >> http://rapidshare.com/files/70767394/Simulation_and_Software_Radio_for_Mobile_Communications.pdf >> >> http://rapidshare.com/files/70763178/Software_Defined_Radio_for_3G.pdf >> >> http://rapidshare.com/files/70761692/P.B.Kenington_-_RF_And_Baseband_Techniques_for_Software_Defined_Radio.pdf >> >> http://rapidshare.com/files/70759139/Software_Defined_Radio.pdf >> >> http://rapidshare.com/files/70757976/Software_Defined_Radio_-_Enabling_Technologies.pdf >> >> http://rapidshare.com/files/70756891/Software_Defined_Radio_-_Origins__Drivers___Int_l_Perspectives.pdf >> >> http://rapidshare.com/files/70756212/SDR_in_Direction_Finding_RFDesign_0105.pdf >> >> http://rapidshare.com/files/70754651/FPGA_in_software_defined_radio.pdf >> >> http://rapidshare.com/files/70754388/Error_Control_Coding_In_Software_Radios_-_An_Fpga_Ieee-Usaf.pdf >> >> http://rapidshare.com/files/70754224/Digital_Receiver_Handbook_Basics_of_Software_Radio.pdf >> >> http://rapidshare.com/files/70754058/Channelization_Paper_SDR_forum.pdf >> >> >> Regards, >> >> Firas >> > > -- View this message in context: http://www.nabble.com/SDR-Books-tf4842282.html#a13856264 Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Repeat samples
Hi, I was wondering if there's a GNURadio block which simply repeats incoming samples n times, or if any of the currently available blocks somehow do this without to much of an overkill? Thanks for any help, Martin -- Martin Braun Institut fuer Nachrichtentechnik Universitaet Karlsruhe http://www.int.uni-karlsruhe.de ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Python blocks in a new package
I've been creating a new package, called tdrss, based on the examples in gr-howto-write-a-block-3.1.1. The C++ blocks in src/lib and the QA tests in src/python all work fine, but I've been having a problem intalling the one Python block I wrote. It's in a subdir called tdrss_utils that is under src/python. I added a line "SUBDIR = tdrss_utils" to the Makefile.am in src/python, put a copy of __init__.py in src/python/tdrss_utils, and created a Makefile.am in src/python/tdrs_utils containing: - include $(top_srcdir)/Makefile.common # Install this stuff so that it ends up as the gnuradio.tdrss_utils # module # This usually ends up at: #${prefix}/lib/python${python_version}/site-packages/gnuradio/tdrss_utils tdrss_utilspythondir = $(grpythondir)/tdrss_utils tdrss_utilslibdir= $(grpyexecdir)/tdrss_utils tdrss_utilspython_PYTHON = \ __init__.py \ gold_code_pn_source_b.py CLEANFILES = *.pyc - If I run bootstrap, no Makefile.in or Makefile get created, and when I run make, I get: Making all in python Making all in tdrss_utils make[4]: *** No rule to make target `all'. Stop. What automake magic am I missing? @(^.^)@ Ed ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Repeat samples
Martin Braun wrote: Hi, I was wondering if there's a GNURadio block which simply repeats incoming samples n times, or if any of the currently available blocks somehow do this without to much of an overkill? Thanks for any help, Martin Check ou gr_regenerate_bb. It's only designed to work on bits, but you should be able to convert it easily. Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Python blocks in a new package
Ed Criscuolo wrote: > What automake magic am I missing? You need to add one line to configure.ac specifying the new makefile. It's near the bottom. -- Johnathan Corgan Corgan Enterprises LLC http://corganenterprises.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] failed assertion in gr_buffer.h
Eric Blossom wrote: Are you consuming more input than is available (as indicated by the ninput_items argument to general_work)? I suspect a problem either in forecast or in your loop control in general_work. I finally found a subtle bug that was clobbering the return value fron general_work right before the return. Works fine now. Thanks for the help! @(^.^)@ Ed ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Python blocks in a new package
Johnathan Corgan wrote: You need to add one line to configure.ac specifying the new makefile. It's near the bottom. Thanks Jonathan. That got the Makefile.in and the Makefile constructed. The make install succeeded, but I only ended up with a file called gold_code_pn_source_b.py in .../site-packages/gnuradio/tdrss_utils . The .pyc and .pyo files were missing, and any attempt to reference tdrss_utils.gold_code_pn_source_b() from a python program fails with the message AttributeError: 'module' object has no attribute 'gold_code_code_pn_source_b' @(^.^)@ Ed ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Another basic question please
Hi, Have UBUNTU 7.10 installed. Trying to install gnuradio for USRP. Following instructions at http://gnuradio.utah. edu/trac/wiki/UbuntuInstall Firas & Shivvaan have been a great help but I am now stuck at the following: * C++ interface to the USRP; provides a good estimate of the maximum throughput (non-quantized) between the host computer and the USRP. cd usrp/host/apps ./test_usrp_standard_tx ./test_usrp_standard_rx I receive the following (have added sudo) I get the same without sudo: [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- examples/python/usrp$ sudo ./test_usrp_standard_tx sudo: ./test_usrp_standard_tx: command not found [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- examples/python/usrp$ sudo ./test_usrp_standard_rx sudo: ./test_usrp_standard_rx: command not found [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- examples/python/usrp$ Your help would be appreciated. Frank Hampshire England ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] failed assertion in gr_buffer.h
On Tue, Nov 20, 2007 at 02:07:56PM -0500, Ed Criscuolo wrote: > > Eric Blossom wrote: > > > > >Are you consuming more input than is available (as indicated by the > >ninput_items argument to general_work)? > > > >I suspect a problem either in forecast or in your loop control > >in general_work. > > I finally found a subtle bug that was clobbering the return value > fron general_work right before the return. Works fine now. > > Thanks for the help! You're welcome. Glad to hear you got it sorted out. Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Python blocks in a new package
On Tue, Nov 20, 2007 at 04:04:49PM -0500, Ed Criscuolo wrote: > Johnathan Corgan wrote: > > > >You need to add one line to configure.ac specifying the new makefile. > >It's near the bottom. > > > > > Thanks Jonathan. That got the Makefile.in and the Makefile constructed. > > The make install succeeded, but I only ended up with a file called > gold_code_pn_source_b.py in .../site-packages/gnuradio/tdrss_utils . > > The .pyc and .pyo files were missing, and any attempt to reference > tdrss_utils.gold_code_pn_source_b() from a python program fails > with the message > > AttributeError: 'module' object has no attribute > 'gold_code_code_pn_source_b' > You need to install an empty __init__.py in to your tdrss_utils directory. See http://docs.python.org/tut/node8.html#SECTION00840 for info on Python packages. Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Another basic question please
On Tue, Nov 20, 2007 at 09:26:37PM +, [EMAIL PROTECTED] wrote: >Hi, > > Have UBUNTU 7.10 installed. Trying to install gnuradio for USRP. > Following instructions at http://gnuradio.utah. > edu/trac/wiki/UbuntuInstall > > Firas & Shivvaan have been a great help but I am now stuck at the > following: > > * C++ interface to the USRP; provides a good estimate of the maximum > throughput (non-quantized) between the host computer and the USRP. > > cd usrp/host/apps > ./test_usrp_standard_tx > ./test_usrp_standard_rx > > I receive the following (have added sudo) I get the same without sudo: > > [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- > examples/python/usrp$ sudo ./test_usrp_standard_tx > sudo: ./test_usrp_standard_tx: command not found > [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- > examples/python/usrp$ sudo ./test_usrp_standard_rx > sudo: ./test_usrp_standard_rx: command not found > [EMAIL PROTECTED]:~/qwt-5.0.2/gnuradio/gnuradio- > examples/python/usrp$ > > Your help would be appreciated. > > Frank > Hampshire > England > Please note the directory: "usrp/host/apps" If you're new to Unix/Linux, there are tons of great books and articles on command line usage, the shell, system administration, etc. E.g., http://www.vectorsite.net/tsshell.html If you like your information dense, you can also type $ man bash and if you're printer is configured, $ man -t bash | lpr will get you a nice typeset document. Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Soft-DVB working flawlessly @ correct bitrate.. (=11.612Mbps)
Hi all thanks again for precious help, I'll soon start working on code cleaning and optimization for real time performance of my Gnuradio DVB Tx. here is a video showing latest improvements in transmitted signal.. http://wwvince.interfree.it/Soft-DVB h264 video as usual Best Regards vincenzo ps Matt ..is the VHF/UHF frontend release date confirmed somewhere around January? Thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Problem with std.ihx
Hi Firas, All those files are there, including std.ihx. Should I try copying std.ihxinto the directory where I'm trying to run these programs? Thanks, ~Martin On Nov 19, 2007 9:13 PM, Firas abbas <[EMAIL PROTECTED]> wrote: > Hi, > > This file should be found in the following folder (in File System): > > /usr/share/usrp/rev4 > > check its existence in this folder. Beside std.ihx file, this folder > should contain also multi_2rxhb_2tx.rbf, std_2rxhb_2tx.rbf, and > std_4rx_0tx.rbf files. > > Firas > > > *Martin Gawecki <[EMAIL PROTECTED]>* wrote: > > Firas, > > Thanks for the info about 7.10. Do you have any idea why I'm getting that > error involving a missing std.ihx file? I've installed the gnuradio > software on two separate machines using the same exact procedure listed on > the installation page for Ubuntu, and I get the same problem on both when i > try to run test_usrp_standard_tx or test_usrp_standard_rx. Any ideas? > > Thanks, > ~ Martin > > On Nov 17, 2007 2:04 AM, Eng. Firas <[EMAIL PROTECTED]> wrote: > > > > > > > Martin Gawecki wrote: > > > > > > > > >>>Finally, one last question - does the installation process described > > on > > the > > >>>Ubuntu page ( http://gnuradio.org/trac/wiki/UbuntuInstall) work for > > 7.10? > > I > > >>>wasn't quite sure, so I went with 7.04, but I'm curious for future > > >>>reference. > > > > > > Yes, the installation steps described for Ubuntu 7.04 are working fine > > for > > > Ubuntu 7.10. > > > The page was updated today. > > > > > > Firas > > > ___ > > > Discuss-gnuradio mailing list > > > Discuss-gnuradio@gnu.org > > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > > > > -- > > View this message in context: > > http://www.nabble.com/Problem-with-std.ihx-tf4825574.html#a13807550 > > Sent from the GnuRadio mailing list archive at Nabble.com. > > > > > > > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Is there a GNU Radio Companion manual?
Hi, I am new to GNU Radio and I have installed GnuRadio3.1.0 on Ubuntu7.10. I have downloaded and installed the GNU Radio Companion and trying to understand how it works The examples are for the basic boards. I have 2 RFX2400 boards that I have pluged into my motherboard. So I was wondering if anyone can advise me if there is any sort of help on how to use the GNU Radio Companion... Thanks, Shivvaan -- View this message in context: http://www.nabble.com/Is-there-a-GNU-Radio-Companion-manual--tf4847760.html#a13870241 Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Soft-DVB working flawlessly @ correct bitrate.. (=11.612Mbps)
Vincenzo, I took a look at the video. Very cool work! If I understand correctly, you are showing gnuradio + your code generating DVB in real time, and transmitting it with a USRP over coax to a set top box for receiving DVB. Is that right? The 50 MHz to 1 GHz transceiver daughterboard should be available in late February. For those who are having trouble viewing it on linux, the video plays for me with mplayer and xine. Matt Vincenzo Pellegrini wrote: Hi all thanks again for precious help, I'll soon start working on code cleaning and optimization for real time performance of my Gnuradio DVB Tx. here is a video showing latest improvements in transmitted signal.. http://wwvince.interfree.it/Soft-DVB h264 video as usual Best Regards vincenzo ps Matt ..is the VHF/UHF frontend release date confirmed somewhere around January? Thanks ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Problem with std.ihx
Hi, No need to copy. leave test_usrp_standard_xx, can you run usrp_fft.py ? It can be found in the foldergr_utils/src/python Firas Martin Gawecki <[EMAIL PROTECTED]> wrote: Hi Firas, All those files are there, including std.ihx. Should I try copying std.ihx into the directory where I'm trying to run these programs? Thanks, ~Martin On Nov 19, 2007 9:13 PM, Firas abbas < [EMAIL PROTECTED]> wrote: Hi, This file should be found in the following folder (in File System): /usr/share/usrp/rev4 check its existence in this folder. Beside std.ihx file, this folder should contain also multi_2rxhb_2tx.rbf, std_2rxhb_2tx.rbf, and std_4rx_0tx.rbf files. Firas Martin Gawecki <[EMAIL PROTECTED]> wrote: Firas, Thanks for the info about 7.10. Do you have any idea why I'm getting that error involving a missing std.ihx file? I've installed the gnuradio software on two separate machines using the same exact procedure listed on the installation page for Ubuntu, and I get the same problem on both when i try to run test_usrp_standard_tx or test_usrp_standard_rx. Any ideas? Thanks, ~ Martin On Nov 17, 2007 2:04 AM, Eng. Firas <[EMAIL PROTECTED]> wrote: Martin Gawecki wrote: > > >>>Finally, one last question - does the installation process described on the >>>Ubuntu page ( http://gnuradio.org/trac/wiki/UbuntuInstall) work for 7.10? I >>>wasn't quite sure, so I went with 7.04, but I'm curious for future >>>reference. > > Yes, the installation steps described for Ubuntu 7.04 are working fine for > Ubuntu 7.10. > The page was updated today. > > Firas > ___ > Discuss-gnuradio mailing list >Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/Problem-with-std.ihx-tf4825574.html#a13807550 Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Soft-DVB working flawlessly
> Soft-DVB working flawlessly ... > thanks again for precious help, Thank *you* for building a great tool on top of all the signal processing work that's been poured into GNU Radio over the years. We hoped someone like you would do things like this! I'll love to see it GUI'd and packaged so that anybody can make a local DVB transmission station by just plugging the hardware together, installing the right software package, and feeding it realtime video streams. Has anyone glued GRC into MythTV? I can already think of one use that others can make of your transmitter. EFF and I are interested in measuring the DRM responses of various digital television consumer products. DRM is the unnecessary restrictions that are built in to control what consumers can do. (Like no fast forwarding; won't play in some countries; or only works with one manufacturer's products.) DVB is really thick with complicated, ugly restrictions like "can only record one copy -- only on Tuesdays and only within 1000 meters or with members of your immediate family except for kids of divorced parents". I bet there is a lot of variation in the products that try to enforce it -- and maybe some don't even try. Manufacturers tend to avoid documenting these 'features', for some reason. We consumers can benefit by collectively reverse-engineering what they are up to. In particular, nobody should be buying DRM-laced products without knowing it, when similar non-DRM products would serve the consumer as well or better. But how can we tell them apart? A broadcast-quality software transmitter for DVB (and for ATSC and other dtv waveforms) would let us do these tests. (We'll also need a simple editor for MPEG transport streams, for inserting and removing "Broadcast Flags" and other data items.) John Gilmore ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio