highaltitude.log.20150325

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[01:22] <Oddstr13> the "gibberish" in Pcal's terminal reminds me of incorrect serial speeds
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[01:38] <Ian_> I think that it is more basic than that. it's good to have a few concepts to work with but he's approaching both radio and dl-fldigi as an unlit blank canvas at the moment. After a while he will wonder how he had quite so much trouble.
[01:39] <Ian_> Gnite, bed.
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[06:50] <Reb-SM0ULC> morrn
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[09:09] <Babs____> More random eagle questions - Can I get a pcb stencil made from standard gerber files?
[09:09] <Babs____> As in the ones used to order the pcb?
[09:09] <edmoore> no
[09:10] <edmoore> it's made from a specific layer
[09:10] <edmoore> tCream
[09:10] <edmoore> and bCream
[09:10] <edmoore> so you need to specifically export that one too in your cam job and send it along with
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[09:10] <Babs____> Ok will look it up on the interweb - cheers ed
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[09:11] <LunarWork> morning
[09:11] <edmoore> Babs____, with whom are you planning on getting your pcb made?
[09:12] <edmoore> the people I use can accept an eagle brd file directly and give you a free lasercut stainless stencil with the order
[09:12] <Babs____> I have gone with pcbway before
[09:12] <Babs____> It's an easy order process but no doubt not the cheapest
[09:12] <zyp> edmoore, actually, some stencil producers do indeed generate the layout from the other gerbers
[09:14] <edmoore> yes
[09:14] <edmoore> but i'm not sure i'd want that
[09:14] <edmoore> as they probably just doing slightly naive things like take the pad sizes and reduce them in by 10% or something
[09:14] <edmoore> which is not what you want for a lot of packages
[09:14] <zyp> true
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[09:42] <Geoff-G8DHE-Lap> Is there enough free lift I wonder ;-) http://www.xkcd.com/
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[10:23] <SpeedEvil> :)
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[10:51] <UpuWork> http://imgur.com/a/HpNGL
[10:51] <UpuWork> needs more radios
[10:52] <craag> looks like an attention seeker
[10:53] <edmoore> already a lora radios
[10:53] <UpuWork> it is
[10:53] <Vaizki> hehe rtty, dual lora, aprs?
[10:53] <UpuWork> we code named that board Cilla
[10:53] <UpuWork> yep Vaizki
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[10:53] <UpuWork> Going to put that Lora PCB on sale shortly
[10:53] <Vaizki> and HDMI
[10:53] <Vaizki> don't forget hdmi
[10:54] <mfa298> no #ukhasnet :(
[10:55] <UpuWork> well
[10:55] <UpuWork> I bought a pile of suitable modules
[10:55] <UpuWork> and sitll have a pile of suitable modules :)
[10:56] <mfa298> then after adding the last board you realise you forgot to attach the camera
[10:56] <UpuWork> lol
[10:57] <Vaizki> hollow nylon standoffs with a bolt through the whole stack and a nut on the bottom? :)
[10:57] <edmoore> is LoRa open?
[10:57] <UpuWork> source ?
[10:57] <UpuWork> no
[10:57] <edmoore> oh
[10:58] <edmoore> that's annoying
[10:58] <Vaizki> I think it's about as open as NMEA..
[10:58] <Laurenceb> edmoore: I suspect it could be reverse engineered
[10:58] <edmoore> sure
[10:58] <Laurenceb> but thats a lot of work
[10:58] <Laurenceb> for questionable results
[10:58] <UpuWork> there are some doubts whether its legal either
[10:58] <Vaizki> someone already did a lora decoder in softwar
[10:58] <edmoore> just it would be a shame if a closed thing got mainstreamed into hab
[10:58] <Laurenceb> UpuWork: reverse engineering is legal
[10:58] <edmoore> hope it doesn't
[10:59] <Laurenceb> yeah
[10:59] <UpuWork> no
[10:59] <UpuWork> the large amounts of spectrum it takes
[10:59] Action: Laurenceb is getting very good results with si446x
[10:59] <Miek> Vaizki: got a link?
[10:59] <Laurenceb> i was also looking at spirit1
[10:59] <Vaizki> Miek, no I don't remember the url but it was a plugin to some SDR software not commonly used here
[10:59] <Laurenceb> its not as good as silabs in terms of link budget
[10:59] <Laurenceb> but a very nice ic
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[11:00] <Laurenceb> https://ptelectronics.ru/wp-content/uploads/radiomoduli_sp1ml-868-915_stmicroelectronics1.pdf
[11:01] <edmoore> obviously i should do more than just passively suggest someone should do this, but it would be interesting to see what you could actually do with 3kHz and an 8-bit micro's encoding resources
[11:01] <Laurenceb> not really good enough for balloons.. probably
[11:01] <Laurenceb> i get 80km theoretical range at 500bps
[11:02] <Laurenceb> but with a yagi on the ground it would work
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[11:02] <Laurenceb> spirit1 and silabs are both wireless M-bus
[11:03] <Vaizki> found it. https://github.com/hexameron/rtl-sdrangelove/tree/master/plugins/channel/lora
[11:04] <Laurenceb> wtf
[11:04] <Laurenceb> wow
[11:04] <Vaizki> and no I don't know if maintech Gmbh in the copyright has licensed or reverse-engineered lora
[11:05] <Laurenceb> thats impressive work
[11:05] <edmoore> that C++ looks almost... nice
[11:06] <Vaizki> yes.. for C++.. :)
[11:06] <edmoore> i might go and sit down
[11:06] <Laurenceb> m_chirp = (m_chirp + 1) & (SPREADFACTOR - 1);
[11:06] <Laurenceb> yup its chirp mod
[11:06] <edmoore> actually i had dinner last night with my old pricipal investigator who is really ninja at c++, and he showed me some of his idiomatic c++14
[11:06] <Vaizki> nooooo
[11:06] <edmoore> and it's actually really quite nice and clear and terse
[11:06] <amell> lora software demod? ftw
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[11:07] <Laurenceb> i want to know if it handles the FEC properly
[11:07] <Vaizki> why do I feel like I just let a huge cat out of the bag...
[11:07] <Laurenceb> heh
[11:07] <Laurenceb> now LoRa will be used for everything
[11:07] <Laurenceb> we can build it into dl-fldigi
[11:07] <Vaizki> especially since that URL has been on the channel before :)
[11:07] <Miek> Vaizki: nice
[11:07] <Laurenceb> lol
[11:08] <Laurenceb> we can blame you for this Vaizki
[11:08] <amell> has it?
[11:08] <Miek> there go my plans for the modules i got from UpuWork, i might have to just use them as radio modules :p
[11:08] <Vaizki> March 4th, 2015: [18:08] <seventeen_> Did somone mention LoRa ? https://github.com/hexameron/rtl-sdrangelove/blob/master/plugins/channel/lora/lorabits.h
[11:08] <Vaizki> credit where it's due ;)
[11:08] <amell> floating point is going to get a serious workout with this code.. lots of cos/sin
[11:09] <Vaizki> I'm sure those can be optimized with tables later
[11:09] <Laurenceb> amell: anything with an fpu will laugh at it
[11:09] <Vaizki> that too
[11:09] <amell> yep.
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[11:10] <amell> Hmm, i see a tetra demod in the same github...
[11:10] <Laurenceb> oh shit
[11:10] <Laurenceb> / Ignore the FEC bits, just extract the data bits
[11:10] <Laurenceb> https://github.com/hexameron/rtl-sdrangelove/blob/master/plugins/channel/lora/lorabits.h
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[11:10] <Laurenceb> looks like it needs some more work to be optimal
[11:10] <Vaizki> probably lots
[11:10] <amell> what do you want FEC for? the string includes checksum...
[11:11] <Laurenceb> amell: more link budget
[11:11] <Laurenceb> wtf
[11:11] <Laurenceb> cOGGg7CM2=b5a?<`i;T2of5jDAB=2DoQ9ko?h_RLQR4@Z\\`9jY\\PX89lHX8h_R]c_^@OB<0`W08ik?Mg>dQZf3kn5Je5R=R4h[<Ph90HHh9j;h:mS^?f:lQ:GG;nU:b?WFU20Lf4@A?`hYJMnW\\QZ\\AMIZ<h:jQk[PP<`6[Z
[11:11] <Laurenceb> how the hell did they work that out
[11:11] <Vaizki> it's better to get the correct string than just know you got a bad one...
[11:11] <amell> I was just reading that
[11:11] <Vaizki> Laurenceb, it's a data whitening pattern
[11:11] <Laurenceb> obviously some iq dump and reverse engineering in matlab
[11:11] <Laurenceb> yeah
[11:12] <amell> quick, capture all this before it disappears.
[11:12] <Vaizki> you could figure that out just by sending zeros...
[11:12] <edmoore> amell, FEC = forward error correction
[11:12] <edmoore> emphasis on correction
[11:12] <edmoore> a checksum can't correct errors
[11:12] <edmoore> it can just detect them (probably)
[11:12] <amell> edmoore, yes i know, but its not crucial to getting lora in fldigi...
[11:12] <Laurenceb> yeah, this is going to be quite a few dB off optimal
[11:13] <edmoore> oic
[11:13] <Vaizki> but it's better than nothing
[11:13] <Laurenceb> spirit1 has the advantage of documented FEC
[11:13] <Laurenceb> but then... it looks like the FEC is documented in LoRa?
[11:15] <Laurenceb> looks to me like LoRa is basically just standard FEC + interleave with chirp modulation
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[11:17] <mattbrejza> sx1278 datasheet doesnt say what the coding gain is
[11:17] <mattbrejza> lol
[11:17] <mattbrejza> i suspect its shit
[11:17] <amell> so when will the new Lora dl-fldigi be released for me to install? :)
[11:17] <Vaizki> well looks to me like lora demod needs access to i/q data
[11:17] <Vaizki> so not very soon
[11:18] <mattbrejza> well it not be built into fldigi, itll just be a standalone program
[11:18] <mattbrejza> if anyone bothers
[11:18] <Laurenceb> can SDR#/whatever export high bandwidth audio?
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[11:19] <mattbrejza> you might as well just grab IQ data direct from the dongle
[11:19] <Vaizki> yea or make a plugin to SDR#
[11:20] <fsphil> linux and mac users would like to use it too :)
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[11:20] <infaddict> well said fsphil ;-)
[11:21] <daveake> The Pi runs Linux :)
[11:21] <daveake> and the decoder costs £5 :)
[11:21] <mattbrejza> a soft decoder could search the whole band at once though
[11:21] <fsphil> it's nice to have a waterfall
[11:22] <edmoore> and openness
[11:22] <daveake> true and true and true
[11:22] <edmoore> and not generally turning everything into a closed appliance
[11:22] <daveake> The lack of waterfall is a pain
[11:22] <daveake> works or it doesn't, and if it doesn't you can't see why
[11:23] <Geoff-G8DHE> got to agree on that very offputting to ^^
[11:24] <Laurenceb> tbh im still not convinced by LoRa
[11:25] <Laurenceb> im not sure it outperforms NBFM+FEC
[11:25] <Laurenceb> in fact im certainly not convinced from a theoretical point of view
[11:25] <Laurenceb> i dont see where any gain could come from
[11:26] <Geoff-G8DHE> The main point is that it exists and does work now, is cheap, by directional as well.
[11:26] <Laurenceb> Shannon says additional bandwidth would improve performance a lot, but chirp mod isnt using "real" bandwidth
[11:27] <Laurenceb> its just NBFM in put through some chirp processing
[11:27] <Laurenceb> -in
[11:28] <Laurenceb> theoretically optimal is probably really high data rate QPSK with a ton of FEC
[11:28] <mattbrejza> the reason it works well in practice seems to be that you dont need accurate sync between tx and rx
[11:28] <Laurenceb> or more realistically BPSK so you can track carrier with a Costas
[11:28] <Laurenceb> exactly
[11:28] <mattbrejza> you cant really get NBFM to work at 100bps or so
[11:28] <mattbrejza> with modules
[11:29] <Laurenceb> im currently 6dB off best LoRa 18bps budget using si446x at 200bps
[11:29] <Laurenceb> and thats with no attempt at FEC
[11:29] <mattbrejza> also shannon says using extra bandwidth gets you more capacity rather than SNR performance?
[11:29] <Laurenceb> no
[11:30] <Laurenceb> if you are power limited, Shannon says you need <<1bps/Hz
[11:30] <SpeedEvil> To quote father Jack FEC that's awesome.
[11:30] <mattbrejza> oh right, use MFSK
[11:30] <Laurenceb> but the Hz has to be a real bandwidth use, not a deceptive coding scheme like chirp
[11:31] <Laurenceb> but any FSK is somewhat suboptimal
[11:31] <mattbrejza> well its the same as DSSS?
[11:31] <Laurenceb> hence my saying BPSK at really high rate
[11:31] <Laurenceb> DSSS also gives you no real gain
[11:31] <mattbrejza> yea thats what i was trying to say
[11:31] <Laurenceb> yeah :P
[11:32] <SpeedEvil> Presumably this is in the face of a noiseless channel
[11:32] <SpeedEvil> DSSS can be good jam resistance wise
[11:32] <Laurenceb> SpeedEvil: AWGN
[11:32] <mattbrejza> well AWGN channel
[11:32] <SpeedEvil> yeah
[11:32] <SpeedEvil> A AWGN noiseless channel :)
[11:32] <SpeedEvil> I meant jam free
[11:33] <Laurenceb> i suspect the best we could use on a HAB would be something like 2kbps BPSK with lots and lots of FEC
[11:33] <Laurenceb> to get <500bps throughput
[11:33] <mattbrejza> tbh i was putting out lora at 9600bps last monday and i was picking it up reliably
[11:33] <Laurenceb> wow
[11:33] <SpeedEvil> Laurenceb: these nodes are bidirectional?
[11:34] <Laurenceb> guess it depends what assumptions you make about rx antenna and distance
[11:34] <Laurenceb> SpeedEvil: the spirit1? yes
[11:34] <mattbrejza> we were pretty near the balloon
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[11:34] <mattbrejza> but we wernt hte only ones getting it
[11:34] <SpeedEvil> How many mW?
[11:34] <mattbrejza> 10
[11:34] <Laurenceb> yeah i guess in theory you can get ~10kbps to the horizon with a yagi
[11:35] <mattbrejza> Geoff-G8DHE: what antenna were you using lsat monday for lora?
[11:35] <Laurenceb> Spirit1 modules arent available yet, but ill buy some when they are
[11:35] <mattbrejza> and just to check, were you tuned to the 125kHz one?
[11:37] <Laurenceb> a solar powered set of spirit1 mesh network nodes would be fun
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[11:39] <BobSaget> Upu: this adsb preamp is fantastic!
[11:40] <UpuWork> working well for you BobSaget ?
[11:40] <BobSaget> yeah my range is so much better
[11:41] <UpuWork> cool
[11:41] <UpuWork> I'm working on a improved version
[11:42] <SpeedEvil> :)
[11:43] <infaddict> Morning guys. Sorry to ask again, but i've modified by PCB based on the great feedback received previously. If anybody can spot any further noob problems please shout...
[11:43] <infaddict> http://gerblook.org/pcb/pF9UWtMG2nzMNz3jEaisUM#front
[11:43] <BobSaget> bobsaget.mooo.com:8080
[11:43] <BobSaget> i was just about to buy two more lol i'll wait now
[11:43] <infaddict> or for those with Eagle: https://www.dropbox.com/s/zge7j81uey5ofuy/HAB1.zip?dl=0
[11:43] <Reb-SM0ULC> BobSaget: you got the version where you can put in lat/lon?
[11:44] <Reb-SM0ULC> BobSaget: pse use it and you get range
[11:44] <BobSaget> no???
[11:44] <infaddict> i rewired my breadboard to exactly match the tracing on the PCB and it works fine. So almost ready to order PCB's I think ;-)
[11:44] <BobSaget> you mean dump1090 lat long?
[11:45] <amell> infaddict: looks nice. whats jp1 for? last pin isnt connected to anything
[11:45] <Reb-SM0ULC> BobSaget:
[11:45] <Reb-SM0ULC> BobSaget: yepp
[11:45] <BobSaget> ok i'll look into that thanks!
[11:46] <infaddict> thx amell... its a SD card breakout board. That last pin is the CD and not needed.
[11:47] <infaddict> my only concern was whether the PCB house might not like the fact the GPS is hanging off side of board, with silkscreen outside. presume they will simply cut it off?
[11:47] <chrisstubbs> They might warn you, but yeah it will get cut off
[11:48] <infaddict> thx chrisstubbs. just noticed my board name/version is missing from silkscreen. what layer should i put it on so it actually gets printed on the board?
[11:48] <Geoff-G8DHE> mattbrejza, Crossed 19 element beams http://www.g8dhe.com/amateurradio/g8dhe/beams.jpg
[11:48] <amell> how are you hanging this PCB? presumably its not for pico payload
[11:48] <chrisstubbs> Yeah mounting holes and rounded corners are always nice
[11:49] <mattbrejza> ah right, thatll explain that :P
[11:49] <chrisstubbs> infaddict, I use tPlace and bPlace
[11:49] <infaddict> yer never really thought about mounting holes tbh. its gonna sit in a foam recess inside a stryene payload box.
[11:50] <amell> if youre doing a few, might as well stick some big holes in it in case you need them
[11:50] <infaddict> possibly with some glue holding it down. or is it best to use mounting holes?
[11:50] <Geoff-G8DHE> I tried all the modes you were using 20k8 thru to 125KHz the 125KHz need you clear of the Downs the other modes I was receiving before you rose over the Downs themselves
[11:50] <amell> at the very least you could put a hole each side of JP1
[11:51] <infaddict> ok good idea as its dead space. what size mounting hole is usual?
[11:51] <infaddict> although i need access to SD card in and out but will be careful
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[11:51] <amell> i normally find 3mm works nicely with nylon nuts
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[11:52] <amell> so 3.1mm?
[11:52] <chrisstubbs> What do the 4 holes do under the arduino?
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[11:52] <infaddict> chrisstubbs: they are A4/5/6/7 on the mini pro. i'm using 2 of them for I2C to GPS.
[11:53] <mattbrejza> Laurenceb: turns out it was about 6000bps not 9600
[11:53] <infaddict> thx amell... so could then screw into foam i guess?
[11:53] <Laurenceb> ah
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[11:53] <Laurenceb> i should work out theoretical capacity
[11:53] <amell> i dunno. depends how your box works.
[11:54] <amell> are you getting a few made up?
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[11:54] <mattbrejza> the datasheet doesnt provide a clear formular for throughput :/
[11:56] <edmoore> i would add some caps infaddict
[11:56] <infaddict> yer the places i'm looking to use do 5 or 10 minimum order (and its cheap anyway). dont need that many but hey.
[11:56] <edmoore> a decent reservoir one by the batt in, and some local decoupling ones by the radio, ds1820, and so on
[11:56] <edmoore> and the gps!
[11:57] <edmoore> actually if the gps is a breakout board it'll probs have one already
[11:57] <infaddict> ok edmoore. i'm using a regulated vcc for most components (coming from arduino)...
[11:57] <edmoore> doesn't make a diff
[11:57] <infaddict> but radio is direct from battery
[11:58] <infaddict> ok, that was my next question ;-)
[11:59] <infaddict> so excuse my ignorance but what would the caps do and why i need them? circuit appears to work without them.
[11:59] <Reb-SM0ULC> Laurenceb: interesting discussion about the lora stuff.. uncover "secrets".. :)
[11:59] <edmoore> they provide a local store of charge near where it's needed
[12:00] <edmoore> you cxan probably get away without them in some situations but your tolerance to battery problems, noise, switching transients and so on will be much reduced without them
[12:01] <infaddict> ok thx edmoore. any guidance on size of caps?
[12:01] <edmoore> 100n
[12:01] <infaddict> ok will do some digging
[12:01] <edmoore> and maybe a chunky one by the batt input if you want
[12:01] <edmoore> 10u or something
[12:01] <edmoore> which might be an electrolytic capacitor
[12:01] Action: Miek now has a lifetime supply of 100n caps
[12:02] <edmoore> for ceramic capacitors get a dielectric material like x5r or x7r
[12:02] <Miek> reels are stupidly cheap, couldn't resist..
[12:02] <edmoore> and make sure it's voltage rating is at least twice what it'll actually be seeing
[12:02] <edmoore> for the electrolytic, just make sure the voltage rating is enough for the battery, and get a decent brand - panasonic, rubycon, nichicon etc
[12:03] <Laurenceb> ok I get 3kbps at 6khz channel bandwidth, 434mhz with 9dBi yagi and 950km slant range
[12:03] <Laurenceb> from Shannon
[12:03] <edmoore> bbl
[12:03] <infaddict> thx edmoore
[12:05] <mattbrejza> Laurenceb: is there a version of the capacity equation for a power limited case, where you can use as much BW as you want?
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[12:12] <Laurenceb> mattbrejza: sure, the Shannon equation :P
[12:13] <mattbrejza> well after some rearranging
[12:13] <Laurenceb> http://i.imgur.com/KeCpd2N.png
[12:15] <mattbrejza> perhaps its worth flying some NBFM at 3kbps or so
[12:15] <mattbrejza> and see how it does
[12:15] <Laurenceb> so for BPSK with no FEC you would only get 1.5kbps or so
[12:15] <mattbrejza> will probably require tcxos
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[12:15] <Laurenceb> but you could increase to 3kbps with FEC
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[12:16] <mattbrejza> bpsk isnt that much better than fsk
[12:16] <Laurenceb> yeah, it was just an example
[12:16] <mattbrejza> oh right
[12:16] <number10> has anyone used position info on mobile tracker?
[12:18] <Geoff-G8DHE-Lap> Position info of what ?
[12:18] <number10> of the device its running
[12:18] <number10> on
[12:19] <Geoff-G8DHE-Lap> Yes it will put a little man symbol up where your located
[12:19] <number10> I think there maybe gps conflict - if I fire up google maps I get my corrent position, but if I run the mobile tracker it says no position info
[12:19] <number10> current
[12:20] <Geoff-G8DHE-Lap> You need to tell your browser to use some real position data rather than a look-up of your IP address.
[12:20] <Laurenceb> mattbrejza: I guess this is a useful guide http://i.stack.imgur.com/e1JDh.png
[12:21] <Laurenceb> im not convinced fldigi decoding is very optimal
[12:21] <mattbrejza> i thought there was supposed to be 3dB between coherent and noncoherent fsk
[12:22] <Laurenceb> yeah good point
[12:23] <Laurenceb> anyway, lets call it 12dB for "ok" NBFM performance
[12:24] <Laurenceb> thats ~150bps
[12:25] <Laurenceb> wheras BPSK gets ~1kpbs
[12:25] <Laurenceb> at 10^-3 BER
[12:25] <mattbrejza> hmm yea
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[12:26] <Laurenceb> and should approach 2kbps with modest FEC
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[12:54] <BobSaget> Upu: when and what is the new adsb preamp ???
[12:56] Nick change: fl_0 -> fl_0|afk
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[13:38] <DL7AD> hi fl_0
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[13:38] <fl_0> tag
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[14:22] <diegoesep> hello all
[14:22] <diegoesep> what is the best way to use dlfldigi on Linux with funcube dongle pro+ or RTL dongle?
[14:23] <DL7AD> i think both is ok
[14:24] <diegoesep> but what is the best workflow to get data from the dongles?
[14:24] <DL7AD> well.... i personally cant compare them. ive used funcube on windows and rtl on windows and a bit on linux
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[14:25] <diegoesep> sorry maybe my question was not clear :)
[14:25] <diegoesep> In fact I wanted to know how to connect dl-fldigi to a dongle (any dongle in fact)
[14:25] <diegoesep> for SDR
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[14:27] <DL7AD> ehm... im not sure on linux but for windows there's a program named VAC (virtual audio card) with which you can connect input and output by software.
[14:27] <diegoesep> I have seen a tutorial for linux using pulseaudio between gqrx and dl-fldifi
[14:28] <diegoesep> but I wanted to know if there are other alternatives than using audio mode between these 2 software?
[14:29] <DL7AD> ive used gqrx and dlfldigi once. but thats one year ago and i dont know every detail anymore
[14:29] <DL7AD> UpuWork: do you use linux and sdr?
[14:30] <Geoff-G8DHE-Lap> I think fsphil is the man for linux and dl-fldigi
[14:30] <diegoesep> :)
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[14:31] <diegoesep> I have found this article but I don't know if it is the only way:
[14:31] <diegoesep> http://hab.uggy.org/index.php?article10/decoding-radio-signal-with-dl-fldigi
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[14:34] <Geoff-G8DHE-Lap> dl-fldigi can only handle a 4KHz audio stream, it can't handle an I/Q stream from a dongle etc.
[14:35] <Geoff-G8DHE-Lap> so I can't really see any other way of controlling the Dongle or making an audio stream for dl-fldigi other than one of the SDR programs
[14:35] <diegoesep> 4k or 48khz?
[14:36] <Geoff-G8DHE-Lap> it will handle more than 7KHz but it only shows 7KHz on the waterfal nopt 4KHz sry.
[14:36] <daveake> 4kHz
[14:36] <craag> diegoesep: Easiest way is to use gqrx to listen to the dongle
[14:36] <craag> Then plug an audio cable from audio out -> audio in
[14:37] <craag> And set dl-fldigi to listen to that
[14:37] <craag> (You can do it digitally, but it's broken in all but bleeding-edge linux at the moment)
[14:37] <diegoesep> ok thanks
[14:37] <diegoesep> thanks all
[14:38] <diegoesep> I have another question for you guys :)
[14:38] <DL7AD> shoot
[14:39] <diegoesep> Do you think it is possible to module AFSK from FSK chip like semtech sx1276
[14:39] <diegoesep> and by setting frequency deviation to 1000Hz
[14:40] <diegoesep> so that it will eitheir generate 1200Hz or 2200Hz based on FSK deviation?
[14:40] <DL7AD> yes
[14:41] <diegoesep> that's a good news for me in that case that mean I may be able to emit APRS packets from sx1276
[14:42] <DL7AD> in theory you just have to emit a clear carrier. you are then modulating the reference crystal. thats how many persons do it
[14:43] Nick change: Family -> Lammergeier
[14:43] <diegoesep> so for example for APRS on 144.800
[14:43] <diegoesep> I may use 144.801200 for FSK
[14:43] <diegoesep> and 1000Hz deviation ?
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[14:47] <DL7AD> diegoesep: ehm.... i think the FSK has to swing in a range of 12.5khz
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[14:50] <craag> diegoesep: I think you're confusing FSK and AFSK
[14:50] <diegoesep> craag, yes that's my fear :)
[14:50] <diegoesep> is there a way to configure fsk so that it will be decoded as AFSK?
[14:51] <craag> So how I believe some people do it is to modulate 1200, and 2200hz tones onto the crystal.
[14:51] <craag> The amplitude of which sets your deviation.
[14:51] <craag> When I say 'onto' I mean frequency-wise, so with a varicap diode or similar.
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[15:09] <gonzo_> make sure you understand the difference between FSK and AFSK, otherwise advice won't make much sense!
[15:10] <diegoesep> so do you think there is a way to module AFSK for APRS using a FSK modem?
[15:13] <gonzo_> back to basics.... For FSK, you are shifting the actual TX frequency as you key the 1's and 0's of the data. eg. between 0 = 434.650000 and 1 = 434.65400 That would be a 400Hz shift FSK
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[15:14] <fxmulder_> there is no easy way to translate fsk to afsk
[15:14] <gonzo_> we do that by programming the TX to switch frequencies, of in the case of NTX2 by putting in a keying voltage to the modulation pin, to shift the tx
[15:14] <diegoesep> ok for FSK that is clear for me
[15:14] <gonzo_> AFSK is an audio tone, of say 1200Hz moduolating the transmit
[15:15] <craag> AFSK is frequency modulation on top of frequency modulation
[15:15] <gonzo_> so the RF TX freq is wobbling up and down the band, following the audio tone sine wave.
[15:15] <diegoesep> I was think that it was just shifrint the TX frequency
[15:15] <craag> diegoesep: That's FSK
[15:15] <gonzo_> the amount it moved up and down in RF freq is refered to as the deviation
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[15:16] <diegoesep> ok I understand now
[15:16] <fxmulder_> the descriptions you find of afsk on the web are terrible
[15:16] <diegoesep> so the TX frequency on AFSK is always changing with a sine wave
[15:16] <gonzo_> to send data, you change the freq of the audio tone, between for example 1200 and 2200Hz
[15:16] <craag> diegoesep: exactly
[15:16] <gonzo_> yep that's correct
[15:16] <diegoesep> ok I understand now :)
[15:16] <craag> tis a tough one :)
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[15:17] <diegoesep> so there is no way to modulate AFSK from FSK :)
[15:17] <craag> sounds inefficient - and it is :P
[15:17] <craag> but it has advantages
[15:17] <fxmulder_> not impossible, but it would be a hack
[15:17] <gonzo_> so with an NTX2 where you shift the TX freq by applying a voltage, you would need to generate an audio tne to apply to the TX and adjust the tone to send the data
[15:18] <diegoesep> ok I see
[15:18] <diegoesep> instead of 2 TX frequencies (from 2 different voltage to the NTX2)
[15:18] <diegoesep> you would need to modulate 1200Hz sine voltage to the NTX2
[15:18] <gonzo_> for a TX that requires you to command the TX freq, you qould need to command it up and down at 1000's of times a sec to get it to deviate with the audio. That is not realistic
[15:19] <gonzo_> yep, you got it
[15:19] <diegoesep> ok that 's clear for me !
[15:19] <gonzo_> (you replied as I was typing)
[15:19] <diegoesep> many thanks craag gonzo_ fxmulder_ !
[15:20] <gonzo_> what cragg was suggesting was, on a TX that must be commended to change RF freq, you could add a verical diode to the reference crystal, to make it like an NTX2, where you can waggle the RF TX with a voltage
[15:20] <gonzo_> vericap
[15:20] <gonzo_> varicap
[15:20] <diegoesep> ok I understand
[15:21] <gonzo_> (I can't type today)
[15:21] <daveake> "today" is about the only word you *can* type :)
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[15:21] <diegoesep> so I will stick to the FSK and LORA modulation for my SX1276 tracker :)
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[15:22] <diegoesep> and forget definitively APRS :)
[15:22] <gonzo_> hehe, so tomorrow I won;t be able to type again?
[15:22] <gonzo_> AFSK is not fer efficient in terms of TX power
[15:22] <gonzo_> very
[15:23] <diegoesep> I start to understand what it is less efficient now
[15:23] <gonzo_> in the UK, we are not allowed to use AR airborne, so we don't even try.
[15:23] <diegoesep> I'm living in south of france
[15:24] <diegoesep> and only the 144.650Mhz frequency is allowed airborne for HAM
[15:24] <gonzo_> AFSK is using a lot of power to send the audio tone, which itself carries no data
[15:24] <diegoesep> for my first launch, I used 10W APRS tracker!!
[15:24] <diegoesep> I know it is a total waster of power
[15:24] <craag> Leo used 16mW or something :P
[15:25] <gonzo_> the only advantage for AFSK is, that you can RX it with cheap FM receivers and there is the APRS network in place.
[15:25] <diegoesep> so I'm planning to use lora tracker for my next launches using 50mw
[15:25] <diegoesep> we are not allowed to use the APRS network for airborne also
[15:25] <gonzo_> But the UKHAS guys have their own rx network that is better suited to balloons
[15:26] <diegoesep> I had to use 144.650 instead of 144.800 which is not allowed airborne
[15:26] <gonzo_> I can't comment on lora, I've not tried it yet. Others will reply I expect
[15:26] <diegoesep> I have a 144.650Mhz LoRa tracker which start to work well now
[15:27] <diegoesep> I was thinking about the secondardy tracker , if I can use APRS or RTTY with 50 baud FSK
[15:27] <diegoesep> and now I think that I have my answer :)
[15:27] <gonzo_> on 434MHz there is plenty of AR equipment, which makes it easier. And lots of hams already set up for it. Just needing to run the dl-fldigi.
[15:28] <chrisstubbs> New antenna sponsor http://i.imgur.com/9cTfpoU.jpg
[15:28] <diegoesep> yes I know that 434 Mhz is the best freq to use, but it is not allowed in France :(
[15:28] Nick change: Elwell_ -> Elwell
[15:28] <diegoesep> so I had to use the 144.650
[15:28] <diegoesep> the only advantage I can see is that there is no limit on the tx power
[15:29] <daveake> chrisstubbs Is that the listening bank?
[15:29] <diegoesep> but there is no network like in the UK with ukhas
[15:29] <gonzo_> not allowed, even in the licence exempt band??
[15:29] <diegoesep> yes that 's the current status gonzo_
[15:29] <gonzo_> it only needs to get a few ham stations to listen and you have tracking
[15:30] <gonzo_> ok, understand
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[15:30] <diegoesep> I have recovered my first flight with my home station and mobile chasing car
[15:30] <diegoesep> but it was with 10W APRS :)
[15:31] <diegoesep> I'm still confident that using LoRA at 50mw will be enough for recovering my payload with 3/4 stations
[15:31] <craag> We were using LoRa last week, at 10mW, at 9600 baud :)
[15:31] <craag> Worked fine from the chasecar
[15:32] <diegoesep> without yagi?
[15:32] <craag> yep, magmount whip
[15:32] <diegoesep> ouch that 's a good news!
[15:32] <diegoesep> I may be able to do ssdv in that case :)
[15:33] <craag> http://t.co/VZ3JJfYkbW
[15:33] <craag> (matt brezja's handheld lora receiver)
[15:33] <diegoesep> ncie :)
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[15:33] <diegoesep> nice :)
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[15:38] <diegoesep> I'm very impressed by the LoRa trackers results
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[15:39] <adamgreig> almost as though doing a sensible sort of encoding and error correction is much better than just rtty
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[15:46] <mattbrejza> craag: was 5400 bps in the end (the modems are a bit weird)
[15:49] <BobSaget> hey guys quick question, is there a program out there designed to run dl-fidigi headless in a linux box?
[15:51] <Ian_> I suspect, that if there were, it would be called . . . . . . . dl-fldigi
[15:51] <craag> BobSaget: There is not currently :(
[15:51] Action: Ian_ sees bobSaget with keyboard and long crib sheet
[15:51] <craag> mattbrejza: rgr
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[15:52] <BobSaget> thanks craag, is it possible to start dl-fidigi with some predefined settins on startup?
[15:52] <mattbrejza> you kinda need to point fldigi at the signal, so not sure how you expect it to work
[15:53] <craag> BobSaget: No it isn't :(
[15:54] <craag> Nearest possibility might be mattbrejza's java decoder, as it'll autotune within the waterfall.
[15:54] <db_g6gzh> does it support the fldigi xml-rpc interface? http://www.w1hkj.com/FldigiHelp-3.21/html/xmlrpc_control_page.html
[15:54] <Vostok> but isn't autotune for those who can't sing?
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[15:57] <Reb-SM0ULC> BobSaget: i guss vnc is the best friend for that
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[15:59] <BobSaget> i'd love to have a station here in Hong Kong, but wow.... too hard
[15:59] <BobSaget> got an APRS igate, probably good enough for most balloons
[15:59] <BobSaget> that stray this way
[16:00] <edmoore> why is it hard in hongkong?
[16:02] <BobSaget> i've tried multiple times to set that up using tightvnc on an odroid
[16:02] <BobSaget> never works
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[16:05] <Reb-SM0ULC> BobSaget: i have vnc running to a gnome-session, also possible to spawn session in/with xvnc
[16:06] <db_g6gzh> I know of people who remote control their home station so it should work
[16:06] <Laurenceb> why Clarkson was sacked https://www.youtube.com/watch?feature=player_detailpage&v=h37KQu64RY4#t=28
[16:07] <db_g6gzh> I can also VNC to my car computer from a tablet and see the same display as in the car
[16:09] <Reb-SM0ULC> BobSaget: i have a computer with gnome+vnc, dump1090 etc and then virtualbox with a win7-machine running sdrsharp, basestation
[16:10] <BobSaget> problem is, if reboot like power goes out, you gotta manually start it all over again
[16:12] <db_g6gzh> In the car I just have autologin and start everything in my .xinitrc
[16:13] <db_g6gzh> so it all starts up when I turn the ignition on
[16:13] <Reb-SM0ULC> BobSaget: some troubles yes
[16:13] <Reb-SM0ULC> BobSaget: happens often?
[16:18] <BobSaget> has anyone set dl-fidigi on an arm ?
[16:18] <diegoesep> daveake, craag and others: do you have a capture of a recent rtty fsk wav file that is compatible the latest habitat format?
[16:19] <diegoesep> the icaruscapture.wav seems not to be decoded for the time/altitude,... in hab mode of dl-fldigi
[16:26] <diegoesep> maybe I'm not using the good flight payload xml file
[16:27] <craag> I'm not sure whether that's deliberately broken to avoid it popping up on the map
[16:27] <diegoesep> I'm not in online mode
[16:27] <diegoesep> but I expected the time , latitude , ... to be decoded by dl fldigi
[16:27] <craag> if it's coming up green - you're good
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[16:28] <diegoesep> even if not uploading any data
[16:28] <craag> the rest is handled by the server
[16:28] <diegoesep> yes it is green
[16:28] <craag> not necessarily
[16:28] <craag> some will parse into the fields at the top - but a lot will not
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[16:28] <diegoesep> ok so if the parsing is done by the server that may explain the behaviour :)
[16:28] <craag> It makes a lot of assumptions - often wrong
[16:28] <craag> yep ;0-
[16:28] <craag> *:)
[16:28] <diegoesep> thanks craag
[16:29] <craag> np :)
[16:29] <diegoesep> on http://ukhas.org.uk/communication:protocol
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[16:29] <diegoesep> I have seen that the custom payload format can be added
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[16:49] <diegoesep> craag, what were the lora settings for the 9600bps packets? (SF, FEC, BW)?
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[16:52] <mattbrejza> 7; 4/5; 125 (5400bps)
[16:53] <diegoesep> ok thans mattbrejza
[16:53] <diegoesep> I will be limited to 20.8Khz in France for 144.650
[16:53] <Miek> Vaizki: did you get anything from the auction in the end?
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[17:00] <Vaizki> Miek: I did but I skipped the high end oscilloscopes and signal analyzers, prices went beyond me
[17:01] <Vaizki> I got a R&S CMU 200 and an Anritsu Vector Signal Generator
[17:01] <edmoore> i nearly bought a nice agilent scope
[17:01] <edmoore> but then i didn't
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[17:02] <Vaizki> edmoore, was this a general lament or were you looking at the same auction?
[17:02] <edmoore> general lament
[17:02] <edmoore> my favourite
[17:02] <Vaizki> always a crowd pleaser :)
[17:02] <edmoore> i sometimes get close to spending more than i should for personal test equipment
[17:03] <edmoore> when i could just come into work
[17:03] <edmoore> but i usually stumble back from the edge of the cliff at the last minute
[17:03] <edmoore> but equally money on a good scope is money well spent
[17:03] <Vaizki> anyway, high end rohde & schwarz stuff went for 2-3k euros.. but I don't want to pay that for a spectrum analyzer right now :P
[17:05] <edmoore> no me neither
[17:05] <edmoore> i really want to get a R+S vna for work this year
[17:05] <Vaizki> or scope for that matter. I have a GW Instek scope and a 1054Z on order, that will do me just fine.
[17:05] <edmoore> we've borrowed one enough times
[17:07] <Vaizki> I might be completely bonkers but I bid & won one of these: http://www.anritsu.com/en-US/Products-Solutions/Products/MG3700A.aspx
[17:09] <Vaizki> including attenuator + memory upgrade options
[17:09] <edmoore> oh that's fun
[17:10] <edmoore> we borrowed an SMU for similar things
[17:10] <chrisstubbs> DS1054Z is nice, I got a 1074 for christmas
[17:10] <chrisstubbs> yet to hack it
[17:11] <Vaizki> yea I guess you can hack protocol analysis on it?
[17:13] <chrisstubbs> Yeah that and bandwidth up to 100MHz
[17:16] <Miek> Vaizki: i was watching it, but was worried about only winning 1 or 2 things and paying way too much to ship so backed out
[17:17] <Vaizki> yea well it's a 6 hour drive from here..
[17:17] <Vaizki> and I bought about 140 kg of stuff :)
[17:17] <Miek> hehe :)
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[17:22] <Vaizki> I paid 560 euros for the signal generator and they seem to go for between 3k-40k USD .. :P
[17:23] <Vaizki> so maybe I can get my money back if I don't find any use for it....
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[17:25] <Vaizki> I wanted a SMU 200A but they went for thousands
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[17:31] <mcbcurator> had a chat the other day with one of NASA's balloon guys. If you ever get a chance to go to one of their talks, they're interesting. Enormous balloons flying multi-ton payloads.
[17:33] <edmoore> the 'Blast! The Movie' documentary has quite a lot of CSBF stuff too
[17:35] <mcbcurator> they're about to launch a giant super-pressure balloon from New Zealand that'll fly about 100 days
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[17:44] <Lunar_Lander> hello
[17:44] <mcbcurator> Ahoy.
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[18:40] <anerdev> hey guys =D
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[18:41] <anerdev> I don't understand why fldl-digi don't recognize correctly the string :/
[18:44] <mcbcurator> Is your parity/encoding/baud set correctly?
[18:46] <anerdev> mcbcurator watch here: http://imgur.com/OV0afux
[18:46] <anerdev> the software recognize only the callsign and checksum
[18:48] <Reb-SM0ULC> don't you need flightdocs?
[18:49] <daveake> no
[18:49] <daveake> to get on map needs a payload doc
[18:49] <anerdev> for now no ...
[18:49] <daveake> you have a green line; what's the problem?
[18:50] <anerdev> but if I haven't the docs, fldigi don't put the data in the field like lat, long, alt ?
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[18:52] <mattbrejza> itll only fill in hte boxes if the gps fields are in the format DD.ddddd
[18:52] <mattbrejza> just ignore it
[18:52] <anerdev> In the wiki there is write that can I use the format ddmm.mmmm
[18:53] <anerdev> ddmm.mmmmmm
[18:53] <mattbrejza> yea that format is fine
[18:53] <mattbrejza> the important thing is that habitat parses it fine (and DDMM.mmm is fine)
[18:53] <anerdev> ok ok .. but for show in the field
[18:53] <anerdev> sorry ...
[18:54] <anerdev> for show lat, lon, alt in the field how can I do ?
[18:54] <anerdev> why the software show only the callsign and the checksum ?
[18:54] <mattbrejza> because its only been programmed for dd.dddd, but sending ddmm.mmmm is fine
[18:55] <anerdev> (10 min and I return in chat) ...
[18:55] <mattbrejza> as those boxes are just what flidig does rather than habitat/the tracker
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[20:56] <Vaizki> and btw, if anyone is interested, the same Renesas-Broadcom R&D lab sell off we had today in Finland is happening in the UK next monday
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[20:57] <Vaizki> http://www.equipnet.com/auctions/auction_catalog.aspx?auctionid=652
[20:58] <infaddict> grab yourself a CMW-500!
[20:58] <Vaizki> that's the auction.. prices will probably rise considerably as in Finland but you may get a good deal on good previous gen kit
[20:59] <Vaizki> be prepared to pay at least 30k GBP for a CMW-500 though.. :)
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[21:01] <Vaizki> OH and I almost forgot. you probably have to be a business to bid, not an individual. and VAT + buyer's premium is put on top.
[21:04] Action: mfa298 checks his back pocket
[21:04] <mfa298> nope dont have 30K in loose change
[21:04] <infaddict> have u checked the sofa?
[21:05] <Vaizki> mfa298: well get a CMU 200.. :)
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[21:13] <mattbrejza> does any of that stuff tend to go for super cheap?
[21:17] <fl_0> how long does the ssdv db on habhub.org store pictures?
[21:17] <fl_0> would like to get some from the DN4GB-11 mission 2 weeks ago
[21:17] <Vaizki> mattbrejza: well there was huge interest in the Finnish auction that happened today with 1450 lots or so on sale
[21:18] <mattbrejza> so no :P
[21:18] <Vaizki> I picked up a CMU 200 at 310 euros for example (+ vat)
[21:18] <Vaizki> which I think is cheap since it went for 38k or something new...
[21:18] <mfa298> fl_0: they should be stored for a fair while (possibly indefinetly) but they time out from the home page after a few days
[21:18] <fl_0> mfa298: kk. any way to get some of the past pix?
[21:18] <Vaizki> Rohde & Schwarz high end spectrum analyzers went for 2-4k EUR
[21:18] <mfa298> I think you want ssdv.habhub.org/<PAYLOAD>/<DATE> for them
[21:19] <fl_0> mfa298: thanks. will try that
[21:19] <Vaizki> so not "super cheap" but very cheap compared to what they are listed on ebay or used test equipment sites
[21:19] <Vaizki> http://www.ebay.com/itm/Rohde-Schwarz-FSV7-Signal-and-Spectrum-Analyzer-/140744646524
[21:20] <mfa298> fl_0: as an example http://ssdv.habhub.org/MAJORA/2015-03-20
[21:20] <Vaizki> these went for about 2.5k I think.. I was REALLY CLOSE to getting one
[21:21] <Vaizki> could have been a bit higher, I stopped looking at it at about 2.5k but it was almost closing at that time
[21:23] <Vaizki> hard to say about the UK auction, it's a lot smaller so will not attract as much attention
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[21:25] <fl_0> mfa298: nice. it works. -> http://ssdv.habhub.org/DN4GB/2015-03-08
[21:25] <fl_0> thank you
[21:30] <Jartza> Vaizki: ouch. didn't know about the auction.
[21:31] <Vaizki> it was on our other common IRC channel and they advertised in web banners etc..
[21:31] <Vaizki> even in some magazines I guess
[21:32] <Jartza> well. I've been too busy.
[21:32] <Jartza> new customer and grandmom's death equals to lot of stuff to do.
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[21:33] <Vaizki> ouch.. my condolences :(
[21:33] <Jartza> thanks
[21:34] <Jartza> although, she was already 96
[21:34] <Jartza> oops, 95
[21:34] <Jartza> but anyhow, respectable age.
[21:35] <Vaizki> so what test equipment are you lacking?
[21:40] <Vaizki> we can also take that discussion off channel.. :)
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[22:15] <KF5WYX> Hi all
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[22:17] <Maxell> Hello
[22:24] <Upu> ping BobSaget sorry missed you earlier
[22:25] <Upu> In answer more gain and better oob rejection in theory
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[22:46] <amell> Vaizki: is that broadcom lab in cambridge?
[22:47] <KF5WYX> Anyone know if the Arduino IDE can be made to look in a specific directory for .h/.cpp files?
[22:47] <amell> Oh, apparently is in bridgend.
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[23:03] <KF5WYX> nvm - I think I got it.
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[23:05] <anerdev2> hey guys ...
[23:05] <anerdev2> I created
[23:05] <anerdev2> the flight documents ...
[23:05] <anerdev2> Who can approve ? :)
[23:06] <chrisstubbs> anerdev2, post the ID in #habhub
[23:07] <anerdev2> ok ..
[23:07] <anerdev2> but can you indicate me if I make all correct ?
[23:08] <anerdev2> chrisstubbs Flight ASSM1 Launch (1ca2, not approved, 1 payload) not approved -___-
[23:08] <chrisstubbs> someone will approve it
[23:09] <chrisstubbs> but they may ask you to test the payload doc first
[23:09] <chrisstubbs> eg power your tracker up and get it on the map
[23:09] <anerdev2> ok ... but will contact me on irc or via email ?
[23:10] <chrisstubbs> irc
[23:10] <chrisstubbs> test the payload now if you can
[23:10] <anerdev2> Now I can't
[23:10] <anerdev2> tomorrow yes ..
[23:10] <anerdev2> I have a little problem with time string
[23:11] <anerdev2> so, I made an error .. In the flight documents there are two "ASSM"
[23:11] <anerdev2> there are two "ASSM1 Launch"
[23:11] <anerdev2> can I delete ?
[23:12] <chrisstubbs> No you can only create a new one if there is an error
[23:12] <anerdev2> ok ok perfect
[23:12] <chrisstubbs> and habitat will use the latest
[23:13] <anerdev2> for set the dl-fldigi I need to use this tutorial: http://ukhas.org.uk/guides:tracking_guide
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[23:13] <anerdev2> ?
[23:13] <chrisstubbs> you will then need to re-create your flight doc to reflect the new payload doc
[23:13] <chrisstubbs> (check the dates down the right hand side to pick the latest)
[23:14] <chrisstubbs> yes that tutorial
[23:14] <anerdev2> perfect ...
[23:14] <anerdev2> But I have only a little answer
[23:15] <anerdev2> this is good: http://i.imgur.com/OV0afux.png ?
[23:15] <anerdev2> because only the callsign field and checksum are aactived ...
[23:16] <chrisstubbs> ah yeah that is normal (i think)
[23:16] <anerdev2> because there are the lat, lon, alt value in the string but not in the field ..
[23:16] <chrisstubbs> fix your problem with the time string
[23:17] <chrisstubbs> if you can get it on the map then you should be on the right track to having things working
[23:17] <anerdev2> yep ..
[23:17] <anerdev2> but Can I test the payload tracking from home ?
[23:17] <anerdev2> if all is ok with transmission ?
[23:17] <chrisstubbs> yeah
[23:18] <chrisstubbs> it should appear on spacenear.us if your payload doc is correct and dl-fldigi is configured
[23:18] <anerdev2> ook ook
[23:18] <chrisstubbs> and you have decoded a valid string
[23:18] <anerdev2> I have only a problem with time string -___- I don't understand why the value are incompressible
[23:19] <anerdev2> I don't think that is a Ram problem ...
[23:19] <anerdev2> because the SIm908 have a char time like this: 20150225134550
[23:20] <anerdev2> and I have two method for split , that work alone ... but doesn't work with my arduino sketch
[23:20] <anerdev2> but for the station, what call sign can I use ?
[23:26] <chrisstubbs> You can use any callsign in dl-fldigi
[23:26] <chrisstubbs> nickname etc
[23:26] <chrisstubbs> as for the coding problem, save that for tomorrow when more people are around. I better be off now
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[23:27] <chrisstubbs> also your signal in dl-fldigi looks a bit funky, did you have an antenna connected?
[23:30] <Vaizki> also there is an empty field at the end of the string just before checksum..
[23:32] <anerdev2> ok ok
[23:32] <anerdev2> thank you guys .. Tomorrow I will made correction =D
[23:32] <anerdev2> have a good night
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[23:41] <Lunar_Lander> good night
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[00:00] --- Thu Mar 26 2015