Re: [Discuss-gnuradio] Warning! Warning!
Great, thanks for the clarification, Marcus (and Tom)… Looking forward to the new developments! Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 20, 2011, at 12:01 PM, Marcus D. Leech wrote: > > On 20/10/2011 11:58 AM, Mark Cetilia wrote: >> What does this mean in terms of using older non-UHD-native daughterboards >> such as the DBSRX& BasicRX? >> To be honest, I haven't checked into the UHD driver, since the >> daughterboards I have been working fine without it… >> >> Best, >> Mark >> >> > UHD supports ALL of the previous daughtercards, even ones that are no longer > in production and pre-date UHD. > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] fan replacement for usrp1?
Thanks Robert, I hadn't ever noticed it getting hot to the touch, but I haven't tried running it w/ no fan & top on either… Best, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 19, 2011, at 10:40 AM, Robert McGwier wrote: > Top on. Fire up the fastest card you have (widest band signal you can > process) and put your finger on the FPGA. It is cool. > > If the oscillator in the USRP1 were most stable and accurate, it might make > some sense but it just doesn't in my opinion make sense so I disconnected > them all in my USRP 1's. > > Bob > > > On Tue, Oct 18, 2011 at 11:39 PM, Mark Cetilia wrote: > Ah good, glad to hear it's not just me… > Do you run it with the top on or leave it open? > > Cheers, > Mark > > -- > mark.cetilia.org | mem1.com | reduxproject.com > > On Oct 18, 2011, at 11:02 PM, Robert McGwier wrote: > >> Yes I have. I disconnected it. In my opinion, it is overkill for anything >> going on in a USRP1. >> >> YMMV, >> Bob >> >> >> On Sun, Oct 9, 2011 at 1:43 AM, Mark Cetilia wrote: >> wondering if anybody out there has replaced their usrp1 fan with something a >> bit quieter? >> i find myself listening to its incessant whine many hours a day, and it's >> starting to make me a little crazy— >> especially when i am trying to listen to subtle details… anybody have a >> suggestion for a decent replacement? >> >> cheers, >> mark >> >> -- >> mark.cetilia.org | mem1.com | reduxproject.com >> >> >> ___ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >> >> -- >> Bob McGwier >> Facebook: N4HYBob >> ARS: N4HY >> >> > > > > > -- > Bob McGwier > Facebook: N4HYBob > ARS: N4HY > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Warning! Warning!
What does this mean in terms of using older non-UHD-native daughterboards such as the DBSRX & BasicRX? To be honest, I haven't checked into the UHD driver, since the daughterboards I have been working fine without it… Best, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 19, 2011, at 5:58 PM, Tom Rondeau wrote: > We are REMOVING the USRP and USRP2 components from GNU Radio! > > It's been mentioned in the past, but the change on the next branch is > imminent. As of GNU Radio 3.5, we will no longer support libusrp, libusrp2 or > the GNU Radio interfaces, gr-usrp and gr-usrp2. Everything is moving to using > UHD. > > If you have not started to port your code over to using the UHD driver, start > thinking about it now. Follow the changes that were made in 'next' to convert > the old examples that used to use the gr-usrp/usrp2 interfaces to gr-uhd. > > This also reduces the number of dependencies required. Updates on this will > be posted on the wiki when it becomes the stable release. > > Tom > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] fan replacement for usrp1?
Ah good, glad to hear it's not just me… Do you run it with the top on or leave it open? Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 18, 2011, at 11:02 PM, Robert McGwier wrote: > Yes I have. I disconnected it. In my opinion, it is overkill for anything > going on in a USRP1. > > YMMV, > Bob > > > On Sun, Oct 9, 2011 at 1:43 AM, Mark Cetilia wrote: > wondering if anybody out there has replaced their usrp1 fan with something a > bit quieter? > i find myself listening to its incessant whine many hours a day, and it's > starting to make me a little crazy— > especially when i am trying to listen to subtle details… anybody have a > suggestion for a decent replacement? > > cheers, > mark > > -- > mark.cetilia.org | mem1.com | reduxproject.com > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > -- > Bob McGwier > Facebook: N4HYBob > ARS: N4HY > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] fan replacement for usrp1?
ok so this has been working just fine at home, but i am actually beginning to use the usrp in performances fairly regularly, and you never know what might happen in such situations… so just to be on the safe side, i'd really rather replace the fan. unfortunately i'm not having much luck finding the exact fan that came with it in stock anywhere, but i've found a possible replacement that seems to basically meet the specs: http://search.digikey.com/us/en/products/F410T-05LC/563-1130-ND/1165524 the only thing that doesn't match up is the air flow— it's rated at 3.9CFM rather than the cooltron's 4.6CFM. anyone have a clue as to whether or not this would be enough of a difference to cause concern? otherwise the specs look fine, and it's supposed to have a noise floor of 12 dBA instead of ~21, so we're talking roughly half the volume… could really make a difference. thanks in advance, mark p.s. does anyone else have this same issue or is it just me? i'm wondering if maybe it's just that my fan is defective… 20 dBA should be "a whisper" and mine seems to be much louder than that. -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 9, 2011, at 2:04 PM, Mark Cetilia wrote: > ah yes, i feel it coming back, slowly. > thank you :) > > m > > -- > mark.cetilia.org | mem1.com | reduxproject.com > > On Oct 9, 2011, at 3:39 AM, Mike Jameson wrote: > >> Hi Mark, >> >> If you take off the top of the enclosure on the USRP1 then you don't even >> need a fan! >> >> Your sanity should then return :) >> >> Mike >> M0MIK >> >> >> On 9 October 2011 06:43, Mark Cetilia wrote: >> wondering if anybody out there has replaced their usrp1 fan with something a >> bit quieter? >> i find myself listening to its incessant whine many hours a day, and it's >> starting to make me a little crazy— >> especially when i am trying to listen to subtle details… anybody have a >> suggestion for a decent replacement? >> >> cheers, >> mark >> >> -- >> mark.cetilia.org | mem1.com | reduxproject.com >> >> >> ___ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] fan replacement for usrp1?
ah yes, i feel it coming back, slowly. thank you :) m -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 9, 2011, at 3:39 AM, Mike Jameson wrote: > Hi Mark, > > If you take off the top of the enclosure on the USRP1 then you don't even > need a fan! > > Your sanity should then return :) > > Mike > M0MIK > > > On 9 October 2011 06:43, Mark Cetilia wrote: > wondering if anybody out there has replaced their usrp1 fan with something a > bit quieter? > i find myself listening to its incessant whine many hours a day, and it's > starting to make me a little crazy— > especially when i am trying to listen to subtle details… anybody have a > suggestion for a decent replacement? > > cheers, > mark > > -- > mark.cetilia.org | mem1.com | reduxproject.com > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] fan replacement for usrp1?
wondering if anybody out there has replaced their usrp1 fan with something a bit quieter? i find myself listening to its incessant whine many hours a day, and it's starting to make me a little crazy— especially when i am trying to listen to subtle details… anybody have a suggestion for a decent replacement? cheers, mark -- mark.cetilia.org | mem1.com | reduxproject.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Cheap portable antenna for SSB + CW w/ USRP1?
Hi Louis, Thanks for the leads—the mini-loop tuner looks like a great possibility, though it seems like I'd need to swap out for a different size loop each time I want to change bands—1/4 wavelength, they say— but is there maybe some flex room in there? Also confused as to whether it would help to have an active loop for receiving, or if that's just for sending? Apart from having built a square loop antenna for receiving VLFs (from the Calvin R. Graf book), I'm a total newbie when it comes to antennas, so it all seems a bit daunting, as I'm sure you can imagine :) Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 7, 2011, at 10:20 PM, Louis Brown wrote: > > On Oct 7, 2011, at 11:01 AM, discuss-gnuradio-requ...@gnu.org wrote: > >> [Discuss-gnuradio] Cheap portable antenna for SSB + CW w/ >> USRP1? > > Since you are only interested in RX, a loop would probably work well. You > could probably rig up compact, muti-turn wire loop that could be broken down > and folded. A simple passive loop requires a high-Q, variable plate > capacitor you must tune for resonance, so it is inherently narrow band, but > that also gives you rejection. They are lossy too, but HF is dominated by > atmospheric noise so noise figure is not a prime concern. MFJ-952 is a > mini-loop tuner; just add your own wire. There are active loops too. This is > a list: > > http://homepages.tig.com.au/~vk5vka/antnews.htm > > Active loop design: > > http://sivantoledotech.wordpress.com/2010/09/18/a-tuned-active-receiving-loop/ > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Cheap portable antenna for SSB + CW w/ USRP1?
Thanks Marcus, I realize I'm asking for the impossible at a certain level—"adequate but not stellar" should be fine :) Glad to know that the roll-off is not so steep as to make >30MHz / <50MHz unusable as well… Btw, I finally managed to get UDP between my external app and GnuRadio up & running—thanks again for all the help! Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Oct 7, 2011, at 12:03 AM, Marcus D. Leech wrote: > On 06/10/11 11:51 PM, Mark Cetilia wrote: >> Hi all, >> Just curious if anyone might have some suggestions for a cheap (ideally < >> $100) portable antenna for receiving (not transmitting) SSB + CW? >> Something that can easily fit into a carryon bag, can be used indoors and >> set up / broken down quickly would be great. >> >> It would be nice to cover as much of the LFRX's range as possible—160 to 6 >> meters I guess? >> The Ettus site mentions DC to 30 MHz, but the board has DC to 50 MHz >> silkscreened onto it—not sure which is correct? >> >> > The LFRX has a not-very-steep roll-off above 30MHz, so it's usable above > 30MHz. > >> I've got my eye on an MFJ-1622 right now, which supposedly covers 40 to 2 >> meters. >> Not completely optimal, but it's looking decent for the price + form factor… >> >> Anybody out there have experience with that antenna? >> Other possible leads would be greatly appreciated as well. >> >> Thanks so much! >> >> >> > The MFJ-1622 is probably adequate, but not stellar. Its hard to make an > antenna that is both a good > match, *and* a good radiator over wide frequency radiators, *and* is > physically compact. > > > > > -- > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Cheap portable antenna for SSB + CW w/ USRP1?
Hi all, Just curious if anyone might have some suggestions for a cheap (ideally < $100) portable antenna for receiving (not transmitting) SSB + CW? Something that can easily fit into a carryon bag, can be used indoors and set up / broken down quickly would be great. It would be nice to cover as much of the LFRX's range as possible—160 to 6 meters I guess? The Ettus site mentions DC to 30 MHz, but the board has DC to 50 MHz silkscreened onto it—not sure which is correct? I've got my eye on an MFJ-1622 right now, which supposedly covers 40 to 2 meters. Not completely optimal, but it's looking decent for the price + form factor… Anybody out there have experience with that antenna? Other possible leads would be greatly appreciated as well. Thanks so much! Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] floats over UDP into GRC?
Ok so I have made some headway & am now sending floats over UDP as binary data (4 bytes), followed by a null packet (1 byte of "\0") but am not sure how to unpack the data into a float in GRC… It's all happening within the same machine on an Intel Mac so there shouldn't be any issues with endianness. Any ideas / suggestions? Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Sep 13, 2011, at 8:24 PM, Mark Cetilia wrote: > Thanks so much Marcus, this makes perfect sense… > > Cheers, > Mark > > -- > mark.cetilia.org | mem1.com | reduxproject.com > > On Sep 13, 2011, at 7:45 PM, Marcus D. Leech wrote: > >>> I'm producing the stream in C++ (using openFrameworks) and sending the data >>> as char arrays, >>> and have confirmed that this is indeed all that is being sent (e.g. "1.25")… >> So, you're sending them in ASCII? As ASCII strings? >> >> GRC/gnuradio has no method for dealing with that. The UDP block assumes >> native machine-binary format for data coming in >> over UDP. Doing it in ASCII (Or Unicode, or whatever) strings will be >> hugely inefficient, both in terms of bandwidth required-- >> it takes many more bytes to represent a floating-point number in ASCII, than >> in the native binary format, and converting from >> strings back into the native binary format is also quite expensive. Since >> UDP is entirely binary transparent, there's no reason >> to send them as ascii strings. The only thing you have to watch out for is >> if the raw floating-point format between your two >> machines is different. But between x86-family machines, it's all the same. >> >> >> >> -- >> Marcus Leech >> Principal Investigator >> Shirleys Bay Radio Astronomy Consortium >> http://www.sbrac.org >> >> > > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] floats over UDP into GRC?
Thanks so much Marcus, this makes perfect sense… Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com On Sep 13, 2011, at 7:45 PM, Marcus D. Leech wrote: >> I'm producing the stream in C++ (using openFrameworks) and sending the data >> as char arrays, >> and have confirmed that this is indeed all that is being sent (e.g. "1.25")… > So, you're sending them in ASCII? As ASCII strings? > > GRC/gnuradio has no method for dealing with that. The UDP block assumes > native machine-binary format for data coming in > over UDP. Doing it in ASCII (Or Unicode, or whatever) strings will be > hugely inefficient, both in terms of bandwidth required-- > it takes many more bytes to represent a floating-point number in ASCII, than > in the native binary format, and converting from > strings back into the native binary format is also quite expensive. Since > UDP is entirely binary transparent, there's no reason > to send them as ascii strings. The only thing you have to watch out for is > if the raw floating-point format between your two > machines is different. But between x86-family machines, it's all the same. > > > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] floats over UDP into GRC?
I'm producing the stream in C++ (using openFrameworks) and sending the data as
char arrays,
and have confirmed that this is indeed all that is being sent (e.g. "1.25")…
I think what I'm missing is how to unpack them from the char arrays in GRC,
tried various conversions, ("Packed to Unpacked," "Char to Float," etc.)
but am just not getting my head around how GRC would handle this…
Cheers,
Mark
--
mark.cetilia.org | mem1.com | reduxproject.com
On Sep 13, 2011, at 7:21 PM, Marcus D. Leech wrote:
> On 09/13/2011 07:05 PM, Mark Cetilia wrote:
>> Hi all,
>> I would like to stream floating point numbers from another application into
>> GRC;
>> currently sending them over UDP as char arrays, which I was hoping to
>> convert back into floats in GRC.
>>
>> Seems like kind of a basic thing, but I can't get my head around how this is
>> possible.
>> Any pointers / advice would be greatly appreciated…
>>
>> Cheers,
>> Mark
>>
>>
> How are you producing the UDP stream? ARe you saying that in your
> "producer" you don't know how to pack complex-floats into
> a UDP buffer, or something else?
>
> The UDP source in GRC is perfectly happy to unpack complex-floats (or floats,
> or whatever) from a UDP-based stream.
>
>
>
>
> --
> Marcus Leech
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
>
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] floats over UDP into GRC?
Hi all, I would like to stream floating point numbers from another application into GRC; currently sending them over UDP as char arrays, which I was hoping to convert back into floats in GRC. Seems like kind of a basic thing, but I can't get my head around how this is possible. Any pointers / advice would be greatly appreciated… Cheers, Mark -- mark.cetilia.org | mem1.com | reduxproject.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Open Sound Control block for GRC?
Hello all, I'm in the process of putting together an SSB/CW receiver using GNU Radio + a USRP1, and just came across the GNU Radio Companion, which is a truly wonderful thing… One thing that seems to be missing from the Companion is the ability to easily interface with other software or to control it from another networked machine / device, so the Open Sound Control (OSC) protocol seems like a no-brainer… OSC uses UDP packets formatted like URL strings (e.g. /filter/width 500) to communicate between software locally or over a network: http://opensoundcontrol.org/spec-1_0 It sports some handy features such as pattern-matching & time tags, and has been implemented in a number of programming languages and development environments as well as numerous commercial software applications, (including Python, Ruby, PHP, Java, Processing, OpenFrameworks, Cinder, SuperCollider, PD, Max/MSP, Reaktor…) on most platforms you can think of: http://opensoundcontrol.org/implementations Given that OSC has been implemented in Python already, starting from Simple OSC: http://www.ixi-audio.net/content/body_backyard_python.html or pyOSC: https://trac.v2.nl/wiki/pyOSC should make this a straightforward enough process, but not having written a GRC block before, I'm wondering if anyone might have pointers on where to begin, or might be interested in a quick port. Warm regards, Mark -- mark.cetilia.org | mem1.com | reduxproject.com ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
