// #eevblog — 2020-03-11
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00:42:18 Join: hsn93 ([email protected]) to #EEVblog
00:45:23 Quit: hsn ([email protected]) Ping timeout: 121 seconds
00:55:02 <hsn93> hey guys im looking at (ethernet 100Mbps.. MII routing design from microchip dev-board) .. there is no length matching .. stubs, vias used and layer change) .. is that ok !!?
00:56:13 <hsn93> the stubs is because there are (configuration pull up resistors) for boot setup of the PHY chip
00:57:35 <hsn93> https://snipboard.io/14Fmqt.jpg ^
00:58:18 <hsn93> isnt that like (suppose to be design reference) for others xD ?
01:07:30 <rust_collector> elloh
01:07:47 <Lemon> elo rustyboi
01:08:09 <rust_collector> yes, or bto to you
01:08:17 <Lemon> rusty I looked at chinese test gear......
01:08:20 <geekmoto19> morning
01:08:31 <rust_collector> hey
01:08:40 <rust_collector> ok, what is the plan now?
01:08:42 <Lemon> hello geekmoto
01:09:04 <Lemon> well Ive been wanting a pulse gen you know, and an arbritary gen too
01:09:20 <Lemon> I looked around, and those siglent 1032X can be hacked up to 60mhz, got nice features etc etc
01:09:26 <Lemon> and are withing budget, at 300 euros or so
01:09:36 <rust_collector> hhm
01:09:47 <Lemon> used big brand gens doesnt come close
01:09:52 <Lemon> some 10mhz ones cost 500+
01:11:31 <Lemon> and it does the job as a pulse gen
01:11:46 <Lemon> you can even connect a 10mhz ref to it for more accuracy
01:11:56 <Lemon> siglent is the only chinese brand I accept honestly
01:12:05 <Lemon> I would avoid it if I can be for that, its unbeatable
01:15:21 <Lemon> ho and yesterday night I bought stuff
01:15:25 <Lemon> small stuff but hey cool stuff
01:15:40 <Lemon> a little stand/sponge holder + two tips for my ts100 iron
01:15:47 <Lemon> (30 euros total, 1 month shipping yay)
01:15:56 <Lemon> and a little psu... I coudlnt resist it was cute
01:16:01 <Lemon> 9v, 2.4 amps
01:16:04 <Lemon> yes its weird
01:16:12 <Lemon> 25 euros + 8 for shipping
01:17:24 <Lemon> https://www.leboncoin.fr/bricolage/1708056383.htm/#
01:17:26 <rust_collector> well, I think ... I need pics of a small power
01:17:27 <Lemon> https://www.leboncoin.fr/bricolage/1708056383.htm/
01:17:28 <rust_collector> thing
01:17:50 <Lemon> needs some cleaning and sticker removal
01:17:51 <rust_collector> myeah, ok
01:17:52 <Lemon> but its nice
01:18:17 <rust_collector> i wonder what it was designed for...
01:18:45 <Lemon> idk, but its great for stuff that runs on AA, or usb/9V batteries
01:19:42 <rust_collector> yes, sure, but there was no usb at all when that thing was made. I just think 9v is a strange place to stop on something like that.
01:19:54 <Lemon> yeah thats true
01:20:02 <Lemon> I like power supplies
01:20:14 <rust_collector> I mean, if it was to run something that used 9v batteries...
01:20:22 <rust_collector> ok, but 2a?
01:20:30 <Lemon> yeah 2.4 amps lol
01:20:33 <rust_collector> not that it matters
01:20:35 <Lemon> thats interesting
01:22:04 <rust_collector> I have a thing for power supplies too. it is the only thing I really think about building myself. the rest is just figuring out how to repair things and such.
01:22:31 <Lemon> yeah you never have enough of them
01:23:04 <rust_collector> oh, I do.... I have... many. but they are all either crap, or just wrong
01:23:28 <Lemon> id like to get a high voltage one
01:23:37 <Lemon> theres a 1kv 200ma one for 120 euros
01:23:43 <Lemon> which is decent but its far
01:24:18 <rust_collector> meh, just keep looking. it is not something you probably need right now
01:24:41 <Lemon> yeah im focusing on scope/arb gen
01:25:00 <rust_collector> les, let up gen some arbs
01:25:30 <Lemon> I'll have so much fun with it
01:25:34 <Lemon> and learn a lot too
01:26:23 <rust_collector> mmkay
01:26:34 <rust_collector> I hope you are right
01:27:12 <Lemon> right about ? the choice of that gen ?
01:28:00 <rust_collector> right about you going to learn a lot or at least have fun with it
01:28:10 <Lemon> ha hoim sure of that
01:28:18 <Lemon> waveform gen are fun
01:28:38 <rust_collector> ok, what is fun about that?
01:29:02 <K> it's curvy!
01:29:09 <Lemon> discovering new waveforms, obsverving them with a scope, fiddling around etc
01:29:12 <Lemon> learning how it works
01:30:20 <rust_collector> learning how a box works, to draw squiggles on your scope... ok. that can be fun enough, but I think you should find a real use for this thing
01:30:40 <Lemon> how I sure will
01:31:26 <rust_collector> I mean, you can get an etch-a-sketch for about the same price, and it will make very many kinds of squiggles
01:31:48 <rust_collector> with a built in "scope"
01:32:02 <Lemon> yeah but you know, I like electronics, especially test equipement, and with those instruments I can learn shit which is nice
01:32:05 <rust_collector> eh? eh? ultimate budget lab stuff
01:33:47 <rust_collector> arrrfff, well, you know, it is not my problem, and you should do what you want. I am just trying to keep you from buying 2 of each device ever made
01:34:26 <rust_collector> I mean, just because they exist
01:34:40 <Lemon> ho theres so many devices that I dont want to get dont worry xd
01:35:07 <Lemon> ffor example a gsm analyzer isnt really interesting for me
01:35:27 <rust_collector> "here is my list of unwanted devices, rated by unwantedness from 0 to 4"
01:37:59 <Lemon> and you know, for me its all fun and games, I woundt do it if it wasnt making me happy :>
01:40:46 <rust_collector> no, but make sure it stays fun and games
01:42:20 <Lemon> ho it will, I'll just sell stuff if it doesnt
01:46:45 <Ampera> Lemon, hopefully you don't have children
01:46:51 <Lemon> I openned my wavetek today to see about the trigger issue
01:46:58 <Lemon> nah I wouldnt do that lol
01:47:19 <Lemon> and sure those last weeks im spending a lot, but its not like that all year :>
01:47:45 <Ampera> yet
01:47:46 <rust_collector> I bet, that if he somehow managed to get a kid, he would start collecting one of each kind
01:49:06 <Lemon> nah ill be ok with one, maybe two max
01:49:24 <Lemon> I'll sell one if its too much to handle
01:50:40 <Lemon> I need to reorganize my room
01:50:50 <Lemon> but fuck idk whats going on my legs hurt like shit
01:50:54 <Lemon> it came outta nowhere
01:51:02 <rust_collector> age
01:51:16 <rust_collector> get used to it
01:51:16 <Lemon> well I know 27 is close but hell
01:51:26 <Lemon> nah but I can barely walk
01:51:35 <rust_collector> do you do anything?
01:52:51 <rust_collector> not doing anything does not help things work as they should
01:53:39 <Lemon> yeah I know that, im used to that kind of pain but now I feel like I was in a carwreck
01:54:33 <hsn93> lemon have lots of childrens actually
01:54:53 <hsn93> lemon's childrens are electrons .. they are flowing and playing everywhere ..
01:56:37 <Lemon> I want to count electrons
01:56:54 <Lemon> I was so close on buying a keithley 616, then I looked at the triax cable needed to use it
01:57:54 <hsn93> can u count them ?
01:58:25 <Lemon> well one atto amps is what, a few electrons worth no ?
01:58:42 <Lemon> 10e-18
01:58:44 <hsn93> they escape before u start counting.. thats why u need a guard ring ? :)
01:58:46 <rust_collector> depends on their weight
01:59:22 <hsn93> lemon's childrens are heavy rust_collector
01:59:35 <rust_collector> I think so too
01:59:50 * Ampera throws an orange at Lemon
02:05:31 <rust_collector> heh, I have never tried to melt solder with a hot glue gun
02:05:52 <Ampera> rust_collector, why on earth would you
02:05:59 <Lemon> why not !
02:06:00 <rust_collector> exactly
02:06:08 <rust_collector> both of you, lol
02:06:19 <Ampera> Lemon, because most hot glue guns don't get hot enough?
02:06:57 <rust_collector> well... if it did, it would be a very cheap base to make a desoldering thing.
02:19:29 <K> did it work?
02:19:42 <rust_collector> what?
02:19:50 <K> hot glue gun and solder
02:20:04 <rust_collector> I dunno? I just told you I never tried, lol
02:20:39 <rust_collector> maybe I could use an american glue gun...
02:22:02 <rust_collector> that should get pretty hot, right? if it lasts longer than a minute, that would be nice too
02:24:46 <rust_collector> in my case, the 70w gun measures to 775ohm. I wonder what an american one measures to
02:29:46 <Lemon> I might ask the tek 540 dude if I can get it tommorow
02:29:55 <Lemon> theres 3 hours by car to reach his place but its fine
02:30:01 <Lemon> thats close to what I'd pay for shipping
02:30:21 <rust_collector> yeah, and quite a bit faster
02:30:31 <Lemon> that too
02:30:37 <Lemon> also I can see it irl first
02:30:43 <Lemon> we can meet etc
02:30:50 <Lemon> idk if scopes like coffee
02:31:45 <rust_collector> you should try it with an expensive one first, than go cheaper and cheaper, to see where they start to like it
02:32:03 <Lemon> yeah
02:32:29 <coppice_> scopes love coffee. they attract the coffee, and coat themselves in it
02:32:50 <rust_collector> my owon usb thing was very very cheap, and it runs on java
02:32:57 <rust_collector> does not work without it
02:34:19 <coppice_> I think Tek and HP put those lead bags on the top of older scopes specifically to stop people putting their coffee mugs on the scopes
03:07:58 <Lemon> im at the last stage of 'do I get the tek tds 540 or not'
03:08:09 <Lemon> I have the money, I looked everywhere to see if theres a better deal
03:32:06 Quit: Lemon ([email protected]) Ping timeout: 121 seconds
03:57:52 Quit: hsn93 ([email protected]) Ping timeout: 121 seconds
04:08:34 <rust_collector> 3 days drive, to get a slightly cheaper scope...
04:09:12 <K> 3 hours, no?
04:09:21 <rust_collector> wait and see
04:09:28 <K> oh.
04:09:50 <rust_collector> there are rumors about his transport module
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05:28:04 Quit: Guest|16087 ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
05:30:49 * Halcyon licks Lemon
05:30:51 <Halcyon> and Ampera
05:31:13 <rust_collector> what lemon?
05:31:23 <Halcyon> Oh he left
05:31:30 <Halcyon> Damn, my joke doesn't work anymore
05:31:59 <rust_collector> good luck tomorrow
05:35:27 <Halcyon> What's tomorrow?
05:35:40 <rust_collector> maybe le-mon is here
05:35:43 <Halcyon> Oh right
05:36:19 <rust_collector> or, I could be nice, and wish you good luck with whatever happens tomorrow
05:37:39 <rust_collector> but, I think it is safer to guess lemon will be here
05:37:48 <Halcyon> Today is tomorrow
05:37:57 <Halcyon> It's almost 0540 and I'm about to leave to work :(
05:38:07 <rust_collector> unless he is on his 3 day road trip, to pick up his scope
05:38:24 <rust_collector> 19.38 here, and I should be in bed
05:40:10 <Halcyon> Early bed time
05:40:15 <rust_collector> yep
05:40:45 <rust_collector> I think I need that 2-3 times each week
05:40:45 * steve30 wraps Halcyon up in duvet
05:40:49 <Halcyon> Anyway I bed be off, have a good night
05:40:51 <Halcyon> Hey Steve :)
05:40:55 <Halcyon> I wish I could stay in bed
05:41:23 <rust_collector> do something funny with the printer at work...
05:41:39 <rust_collector> good...morning, and good night
05:41:47 <Halcyon> :P
05:51:11 Join: AndrevS ([email protected]) to #EEVblog
05:51:42 * Ampera stabs Halcyon
05:51:58 <Ampera> buh, missed him
05:52:26 <rust_collector> you are not getting younger...
05:53:04 <rust_collector> butt, good night
05:55:12 Join: Ysjoelfir ([email protected]) to #EEVblog
05:55:12 Quit: Ysjoelfir ([email protected]) Changing hosts
05:55:30 * Ampera smacks Ysjoelfir with a sausage
05:55:44 <Ysjoelfir> yay!
05:55:51 * Ysjoelfir eats amperas sausage
05:56:05 * Ampera calls Adult Protective Services
05:57:16 <Ysjoelfir> :O
05:57:25 <rust_collector> oh... hey and stuff, and good night to mr Y as well
05:57:39 <Ysjoelfir> Hi rusty :(
05:57:42 <Ysjoelfir> *;)
05:57:46 <Ysjoelfir> *:)
05:57:49 <Ampera> how are you doing Ysjoelfir
05:57:57 <Ysjoelfir> feeling old now
05:58:02 <Ampera> how old
05:58:16 <Ysjoelfir> 30
05:58:30 <Ampera> Nice.
05:58:38 <Ampera> 12 years apart
05:58:40 <Ampera> :3
05:58:49 <Ysjoelfir> :)
05:58:55 <Ysjoelfir> I was there once
06:00:29 <Ampera> yeah and you could drink alcohol too
06:00:33 <Ampera> stop rubbing it in >:D
06:02:25 <Ysjoelfir> I just drank some
06:24:30 <Ysjoelfir> Ampera, did you know that you are allowed to drink with 16 in germany? (Beer and Wine at least)
06:27:32 <Ampera> Ysjoelfir, yes I did know that
06:27:35 <Ampera> here it's 21
06:27:39 <Ampera> to purchase in some areas, to drink in others
06:28:21 <AndrevS> It used to be 16 as well here in the Netherlands, but nowadays it's 18
06:30:05 <Ysjoelfir> well, but in the netherlands you can smoke. if you feel the need to do that.
07:51:40 Quit: AndrevS ([email protected]) Quit: Leaving
08:02:02 Join: Lemonizer (LemonizerX`[email protected]) to #EEVblog
08:02:19 <Lemonizer> hrmmmff downloaded adiirc, banned
08:02:21 <Lemonizer> hi guys
08:08:45 <Ampera> Morning
08:13:33 <Lemonizer> hey, are those mini tektronix 224 rare ?
08:15:13 <Ampera> They're not cooked, I can tell you that
08:15:22 <Lemonizer> :>
08:15:42 <Lemonizer> someone is selling one complete, working with two probes for 100
08:15:43 <Lemonizer> euros
08:15:50 <Lemonizer> I wonder if its worth much more than that or not
08:18:01 <Lemonizer> something tells me to buy it and either keep it as a collectible, or flip it
08:30:13 Quit: Ysjoelfir ([email protected]) Quit: Going offline, see ya! (www.adiirc.com)
08:39:47 <EEVBlog> New EEVBlog Retweet: You Had One Job: There it is. https://t.co/NVYC0uyJau
08:52:48 Join: Ysjoelfir ([email protected]) to #EEVblog
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08:55:51 Join: ThunderSqueak ([email protected]) to #EEVblog
08:55:52 Mode: (by ChanOP) +o ThunderSqueak
08:58:31 <Ysjoelfir> Hi lemon
08:58:39 <Ysjoelfir> yes the mini teks are very rare
09:29:01 <Lemonizer> 100 euros for it is cheap you think ?
09:29:19 <Lemonizer> idk if I want to get it for collection, but maybe I can sell it for more and get more stuff :>
09:29:34 <Lemonizer> (hi :> )
09:36:41 Quit: JoePublic ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
09:37:27 <Ysjoelfir> if its functional - yes. very cheap
09:37:34 <Ysjoelfir> they usually sell for over 200
09:37:48 <Lemonizer> yeah it works, comes with two probes and the pouch
09:37:53 <Lemonizer> idk if theres the bag
09:39:02 Quit: Lemonizer (LemonizerX`[email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
09:39:14 Join: Lemon ([email protected]) to #EEVblog
09:44:12 <Ysjoelfir> sounds like a great deal
09:44:20 <Ysjoelfir> <-- off to bed. gn8
09:44:43 Quit: Ysjoelfir ([email protected]) EOF from client
10:15:29 <EEVBlog> New EEVBlog Tweet: Hapbee, MEGA BUSTED! https://t.co/PhVG0yZv4X
10:51:28 Join: Nothing\ ([email protected]) to #EEVblog
10:51:37 <Nothing\> gutten nippel
10:52:44 <Nothing\> i just picked up modern warfare 4 and unreal tournament 3
10:52:56 <Nothing\> i had some dreams about them last night so i got a huge urge to play them
10:53:30 <Nothing\> i have MW3, which i only just played for the first time today, despite having it for over a year, but i figured i'd go all out and get 4
10:53:55 <Nothing\> though near as i can tell, the multiplayer doesn't seem any different than that in modern warfare or modern warfare 2
10:54:13 <Nothing\> same guns, same maps, same match types
10:57:08 <Nothing\> sat sriakal?
10:57:23 <Nothing\> nameskar?
10:57:52 <Nothing\> salam walyakum?
11:15:54 <EEVBlog> New EEVBlog Tweet: This stuff just writes itself. UK health minister tests positive for coronavirus. https://t.co/02w62ByQ7m https://t.co/jwS8aVi3g3
11:26:52 Quit: Lemon ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
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15:08:08 <pokesomi> hello
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15:09:55 <geekmoto19> didnt notice i got disconnected
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17:24:35 <Ysjoelfir> moin
17:24:54 <hsn93> moin
17:24:59 <steve30> hi
17:26:17 <T3sl4> o/
17:26:32 <hsn93> \_p
17:26:41 * Ysjoelfir starts a mass huggerage and hugs hsn93, steve30 and T3sl4
17:27:00 <T3sl4> :D
17:27:07 <hsn93> ubuntu logo
17:40:30 <hsn93> it there (power dissipation) in line impedance (zo) ? because i used to think the maximum power cant be (1/2) if you match Rl with Ri because Zo is there also .. it might be (1/3) effieciency ..
17:40:38 <hsn93> is there **
17:42:19 <hsn93> but now im confused .. Zo is actually just ratio (ie reflection happens because of it).. but i cant count it as load that will disipate power ..
17:43:02 <hsn93> did i get this correct ? :) ..
17:57:14 <hsn93> assuming its lossless line of course ^
17:58:27 <T3sl4> i made a thingy: https://www.eevblog.com/forum/projects/nice-state-variable-oscillator/new/#new
17:59:19 <T3sl4> hsn93, Zo helps locally, e.g. at a transmitter into a matched line of Zo, all the power is absorbed by the transmission line, and as far as the transmitter is concerned, it doesn't matter where along it that happens
17:59:33 <T3sl4> in practice, very little happens in the line itself, but the transmitter doesn't know that
18:07:56 Quit: ThunderSqueak ([email protected]) Quit: Leaving
18:11:58 <Ysjoelfir> That looks pretty sweet T3sl4 :)
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18:40:44 <hsn> T3sl4 although i dont know what is that oscillator but im sure its cool :P
18:42:12 <T3sl4> it's fairly academic as you might guess, but i like that it can be controlled easily
18:47:59 <Ysjoelfir> What a stupid PSU I have here at work...
18:49:16 <Ysjoelfir> Voltcraft Digi 35 CPU. A "digitally controlled" linear PSU. you switch it on, it shows nothing. you press a voltage on the keypad, it beeps horribly at every fucking keypress. but nothing changes. you press on the "I" button, suddenly the LED for VOLTAGE switches on. You press the "U" button, voltage LED switches off again
18:49:35 <Ysjoelfir> dafuk does that thing work? This will be the first time I have to read a users manual, ever
18:49:57 <Ysjoelfir> I meant a users manual for a friggin power supply
18:52:17 * T3sl4 hugs his (fully) analog power supply, +/-20V 10A
18:52:43 <T3sl4> it's heavy enough i don't have to worry about shifting it on the bench when i do that
18:54:09 <Ysjoelfir> https://www.radiomuseum.org/images/radio/conrad_electronic/voltcraft_netzgerat_digi_35_1947316.jpg
18:54:33 <Ysjoelfir> that is the "standard" version
18:54:58 <Ysjoelfir> and this https://i.ebayimg.com/images/g/Y7UAAOSwo-5eVTvt/s-l400.jpg is the "more highend" abomination I have on my desk here
18:58:49 <Ysjoelfir> free translation from the users manual: To select the output voltage you have to press the U button, to start the voltage setting procedure. after that you have to press three consecutive numbers representing the output voltage. For example, 123 gets you a voltage of 12.3 volts. after you entered the third number the voltage will be displayed in the display. when you now press the U button again the PSU switches the output on and
18:58:49 <Ysjoelfir> adjusts it's voltage to the setpoint. a current limit can be added after that. please note, that the device automatically switches off the numerical keyboard after a voltage is selected. to change the output voltage while the device is working, you have to use the up/down buttons
18:58:55 <Ysjoelfir> what
18:58:57 <Ysjoelfir> the
18:58:58 <Ysjoelfir> f!
19:00:26 <Ysjoelfir> oh, if you try to set a "too high" output voltage it tells you that with a long beep. but ONLY if you entered a value between 351 and 399. if you enter 400 or above it just beeps like it is totally fine with what you try to do
19:01:41 Join: hsn93 ([email protected]) to #EEVblog
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19:13:30 <T3sl4> YFW there's a voltage setting /procedure/
19:14:22 <T3sl4> sounds like it could be greatly improved with a small hammer and two potentiometers
19:20:32 <Ysjoelfir> what does YFW stand for? but yeah, I agree with your suggested improvement
19:23:43 <T3sl4> "your face when"
19:25:38 <T3sl4> a typical face being https://i.imgur.com/uf9YNVmg.png
19:30:26 <steve30> I really should have a hair cut
19:32:13 <T3sl4> like https://i.imgur.com/MQtdUNY.jpg ?
19:32:30 <steve30> nah
19:35:19 <Halcyon> Hahaha
19:35:29 <Halcyon> Those cats look like ballsacks
19:37:31 <steve30> Halcyon, I'm pondering going swimming later
19:38:58 <T3sl4> Halcyon, https://i.imgur.com/0cgIKSd.jpg
19:42:05 <hsn93> T3sl4 love hentai ?
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22:10:03 Topic Is: Official IRC channel of the EEVblog - www.eevblog.tv
22:10:03 Set By: (ChanOP) on: Fri Jan 24 20:18:35 2020
22:10:04 <Ampera> and I have to go bathe my stinky ass
22:10:04 <Lemon> heh same
22:10:04 <Lemon> im going to drive 3 hours to get a scope today
22:10:04 <Ampera> sounds fun, wish I could do that
22:10:04 <Ampera> I get to do what is effectively mass database operations
22:10:04 <Ampera> by hand
22:10:04 <Ampera> carrying over from yesterday when I did just that
22:10:04 <Lemon> heh sounds interesting at least
22:10:04 <Ampera> I like it because I can sit down and get to it, nothing too complicated to think about
22:10:04 <Ampera> I can throw music on and zone out for the entire day
22:10:04 <Lemon> that sounds nice indeed
22:10:04 <Lemon> I need to find new probes
22:10:04 <Lemon> its a 500mhz scope, I found some 500mhz tek probes for 60 euros each which is cheap, but I wonder if they are enough, usually you use a tad more like 750mhz probes for 500mhz signal etc
22:10:04 <DHess_US> Lemon, oscilloscope probe bandwidth does not work that way.
22:10:04 <DHess_US> Plus unless you are looking at sine waves, you need a probe to capture harmonics so the bandwidth needs to be multiple times.
22:10:04 <Lemon> yeah I meant, 'roughly', I forgot the formula
22:10:04 <Lemon> and anyway, I
22:10:04 <Lemon> 'll rarely need that bandwith, I'll just check for cheap probes over time and get them if I can :>
22:10:04 Quit: hsn93 ([email protected]) [Ping timeout: 121 seconds]
22:10:04 <Lemon> its a nice deal, a tek 540 in perfect shape, fully working, last cal done in 2011 (well, better than nothing), with two options for 290 euros
22:10:04 <Lemon> I scanned ebay for weeks and thats impossible to beat
22:10:04 <Lemon> im also tempted to get a siglent or whatever the best arb gen for 300 euros or so
22:10:04 <DHess_US> Lemon, there is no formula. When you use a 500 MHz probe with a 500 MHz oscilloscope, the total bandwidth is 500 MHz.
22:10:04 <DHess_US> The oscilloscope plus the probe are specified for bandwidth at the probe tip.
22:10:04 <DHess_US> With a 25 ohm source impedance.
22:10:04 <Lemon> hmmm I meant, if I indeed try to measure a 500mhz signal with that 500mhz probe, it wont be accurate ? no ?
22:10:04 <Lemon> those rules of thumb comes from somewhere
22:10:04 <DHess_US> In practice with high impedance passive probes, the capacitive loading at the probe tip limits bandwidth.
22:10:04 <Lemon> the probes im looking at are rated for 8pf I think
22:10:04 <DHess_US> Sure, it will be roughly 3dB down
22:10:04 <Lemon> is it fine you think ?
22:10:04 <Lemon> because another 120 euros for two probes is acceptable, but well
22:10:05 <Lemon> I dont want to spend more than the scope on probes :>
22:10:05 <DHess_US> Fine to do what? Flatness to 500 MHz for a 500 MHz oscilloscope and probe won't be any better than 3dB or 0.707%
22:10:05 <Lemon> well, for some regular measurements, some sinewaves, various signals etc
22:10:05 <DHess_US> Instead of thinking in terms of bandwidth, think in terms of rise time where rise time = 0.35/bandwidth
22:10:05 <Lemon> I saw a forumula to roughly determine what was ok
22:10:05 <Lemon> and saw that with a 500mhz probe with the right impedance/capacitance, a 340mhz sinewave would be great
22:10:05 <Lemon> for example
22:10:05 <Lemon> https://www.ebay.fr/itm/Tektronix-P6139A-500Mhz-10M-8-0pF-10x-Passive-Probe-TDS3000-TDS500-Oscilloscope/382956494922?_trkparms=aid%3D1110004%26algo%3DSPLICE.COMP%26ao%3D1%26asc%3D20200220094952%26meid%3De02a270fb5464b8394c70f431a53905d%26pid%3D100008%26rk%3D1%26rkt%3D12%26sd%3D142492399486%26itm%3D382956494922%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3Ddefault%26brand%3DUnbranded&_trksid=p2047675.c100008.m2219
22:10:05 <Lemon> here are the probes in question
22:10:05 <Lemon> if I can watch some 300mhz random signals without any attenuations/artifact/noise/you call it, id be fine !
22:10:05 Join: hsn93 ([email protected]) to #EEVblog
22:10:05 <Lemon> those siglent 1032x seems nice, can be unlocked to 60mhz, which is quite neat for 300 euros
22:10:05 <Lemon> im not a fan of chinese stuff but siglent seems to be alright
22:10:07 <Lemon> and used old arb gen are expensive af
22:10:07 Quit: qeed ([email protected]) [Ping timeout: 121 seconds]
22:10:07 Join: qeed ([email protected]) to #EEVblog
22:10:07 Quit: Dantali0n ([email protected]) [Quit: Bye]
22:10:07 Join: Dantali0n ([email protected]) to #EEVblog
22:12:06 <hsn93> i feel coronized
22:20:52 <Ampera> My PineTime is in NY \o/
22:21:32 <hsn93> https://en.wikipedia.org/wiki/MLT-3_encoding < neat
22:22:08 <hsn93> pine time ?
22:22:09 <Ampera> reminds me of MLC
22:22:17 <Ampera> yeah I bought a smartwatch dev kit
22:22:19 <hsn93> smartwatch
22:22:25 <Ampera> so I can program my own smartwatch
22:22:37 <Ampera> https://www.pine64.org/pinetime/\
22:23:06 <hsn93> yep
22:23:16 <hsn93> not open hardware?
22:23:25 <Ampera> afaik it is mostly open
22:24:09 <hsn93> so u will do FreeRTOS on it ?
22:24:23 <steve30> Looks reasonable, but I think I'll stick to my Casio
22:24:26 <Ampera> Yeah, and some sort of something else
22:24:34 <Ampera> It's impressive because it costs 25 bucks
22:24:45 <Ampera> and I always like interesting programing challenges, so we'll so how this works out
22:25:18 <hsn93> i shared with u the github smart watch before
22:25:27 <Ampera> If you did then I don't recall
22:26:27 <hsn93> well the guy did a lot of custom hand work for the casing and fitting it ..
22:26:29 <hsn93> https://github.com/S-March/smarchWatch_PUBLIC
22:27:02 <hsn93> https://imgur.com/a/FSBwD3g ^
22:28:33 <hsn93> but look .. bare metal "display + ble" watch .. he just wanted it like that :P
22:43:07 Quit: Lemon ([email protected]) Connection closed
22:48:54 Quit: steve30 ([email protected]) Quit: <Baljem> steve30: by the way, I had the most bizarre dream the other day that someone came in here and seriously flipped their shit over your quit message and why aren't the ops /doing/ something about it
22:55:02 Join: Ysjoelfir ([email protected]) to #EEVblog
22:55:03 Quit: Ysjoelfir ([email protected]) Changing hosts
22:55:03 Join: Ysjoelfir ([email protected]) to #EEVblog
22:55:56 <Ysjoelfir> I read hentai? :D
22:56:52 <Ampera> morning
22:56:58 * Ampera smacks Ysjoelfir with a Ysjoelfir
22:57:29 <Ysjoelfir> woah!
22:59:10 <hsn93> lol long time ago ..
22:59:26 <hsn93> this guy is always angry and fingering : https://snipboard.io/fYZGnN.jpg
23:06:20 <Ysjoelfir> I don't know what i think about louis
23:12:09 <hsn93> dont think :P think about what "sex manga" is called .. apperantly "hentai" is for anime ..
23:12:26 <hsn93> what it should be called
23:12:43 <hsn93> mengai
23:12:50 <Ysjoelfir> haha :D
23:15:38 <EEVBlog> New EEVBlog Tweet: In an entirely predictable move, Harvard and MIT are sending students home and telling them to remote study after break: https://t.co/tZXOVaapPf
23:20:40 <EEVBlog> New EEVBlog Retweet: You Had One Job: "Waterproofed the wires, boss!" https://t.co/W8bjZ9xcrW
23:29:00 <hsn93> sunny classroom is funny somtimes: https://youtu.be/kKCDLk9irkQ?t=100 << Ysjoelfir ur getting married this is good for u xD
23:30:43 <Ysjoelfir> loool :D very nice
23:32:19 <hsn93> im in simplex with my wife ?? >> https://snipboard.io/pCjO0t.jpg
23:32:55 <Ysjoelfir> no, that is half duplex
23:35:04 <hsn93> still good :P
23:51:52 <EEVBlog> New EEVBlog Tweet: Insane crowds Saturday afternoon at Sydney domestic air terminal. https://t.co/mL0vcDsRnp
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