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jjoonathan
Добавлен 26 июл 2013
Various bits of test gear. Email address is in the About tab, but you must log in and press a button to view it (anti-spam measure).
RTO2014 Repair Part 1
I just bought a new RTO2014 Oscilloscope! It's beautiful... but it has SDRAM glitches. The ebay seller made it right, but now I have to actually fix it! In this video I track down the faulty chip.
Просмотров: 1 563
Видео
RTO2000 Oscilloscope Repair DRAM Diagnostics
Просмотров 564Месяц назад
If you have DRAM artifacts on your RTO2000 scope, here is the procedure to figure out which chip is responsible (Firmware 5.35.1.0).
Running over VNA cable with car (Parental Guidance Advised)
Просмотров 2,7 тыс.Месяц назад
Marketing says the thick VNA cables with the black jackets are armored, but how armored? Let's find out. No working VNA cables were harmed in the making of this video. I purchased a non-functioning cable specifically for this purpose and thought I'd share.
Coupled Port is Near Port
Просмотров 1243 месяца назад
Part 2: ruclips.net/video/mkGd1uEsAU0/видео.html For coupled-line couplers, my intuition has always been that the coupled line "steals away" part of the signal from the thru line, and that the "stolen" signal on the coupled line travels in the same direction as the signal in the thru line. However, this would suggest that the near port (the port on the coupled line that is closest to the input ...
8565e Cal Part2
Просмотров 1416 месяцев назад
Part 1: ruclips.net/video/Z_Diohl09s8/видео.html Code: github.com/jjoonathan/8560E-Calibration
8565E Cal Part1
Просмотров 1336 месяцев назад
Part 2: ruclips.net/video/dygVTmiumYU/видео.html Code: github.com/jjoonathan/8560E-Calibration
R3271A Fast Sweep
Просмотров 124Год назад
Inside a single band (here, 0-3.6GHz) the Advantest R3271A sweeps fast. Nice!
RTO1024 YouScope & Analysis Tools
Просмотров 662Год назад
The RTO won't dethrone analog scopes in XY, but RGB is nice and the digital analysis tools are killer.
Keithley DMM7510 Stuck Button Repair
Просмотров 667Год назад
I scored a decent "ebay discount" on a DMM7510 with unreliable buttons. Just one problem: the DMM7510 does not use standard blister pad construction! Adhesive Pattern: www.dropbox.com/s/g3gghe2odsm8igm/dmm7510 adhesive outline.svg?dl=0
Advantest R3681 Gated Sweep Tutorial
Просмотров 2653 года назад
A quick tutorial on gated sweep using the Advantest R3681 Signal Analyzer.
Advantest R3681
Просмотров 1173 года назад
A quick runthrough of the single most common spectrum analyzer workflow to capture the "feel" of an R3681.
Advantest R3681 Touch Menu Trick
Просмотров 763 года назад
A simple idiosyncrasy with a simple workaround.
BG7TBL 10MHz DistAmp Self Oscillation
Просмотров 5843 года назад
Self-oscillations? In *my* 10MHz distribution amp? It's more likely than you think.
Advantest R3273 BROKEN Tracking Generator
Просмотров 3933 года назад
Advantest R3273 BROKEN Tracking Generator
Reversible Electrochemical Coloration (raw footage)
Просмотров 13410 лет назад
Reversible Electrochemical Coloration (raw footage)
How did you actually fix the buttons? just cleaning the PCB and the buttons?
Yep! It seemed to work at the time, but it is now 2 years later and starting to show the same problem again. If I could do it again (and I might), I would see if I couldn't replace the little conductive pads outright.
One day you might upgrade it to a Rigol 😉
Is this an Oscilloscope or a spaceship control panel? I feel my DS1054 is a toy compared to this! certainly it is :LOL
Nice Oscilloscope ! Thanks for the look inside. Looking for the next Video !
Cool... but who has $45,000 sitting around for an oscilloscope? LOL
Not me! That's why I bother with broken secondhand equipment: if I repair it, my reward is a bench that punches far above my hobby budget ;)
@@jjoonathan7178 for sure!
@@jjoonathan7178 wow. I watched all the way through… you’re clearly not a hobbyist! That is pure experience and skill. Nice!
the pressure patch of a tire is typically in the range of 1000-2500 pounds per tier depending on weight. a small tubular object is not going to bear full load of a flexible rubber tire. its gonna marhsmellow and put lots of contact pressure around the object and straight to ground. putting more like 100-500 pounds of pressure on this small area. this is not a good test of crush strength for small items.
These are for lab instruments. The threat profile is 50lb plastic boxes and 200lb hairy apes. These cables are expensive -- that short cable may have cost $10k in its past life -- so lab supervisors (myself included) make much ado about how fragile they are and how much care they must be handled with. The connectors are the most fragile part, so this is still accurate to first order, but it is entertaining to see that in one direction at least the protection wildly exceeds expectations.
@@jjoonathan7178 well if thats the range of load you can expect then its probably an ok test. neat info.
Oh my. This is fascinating! Thanks for your investigative work and explanation!
Hello. Can you please measure size of the visible area of the LCD?
Sorry, I do not have this analyzer anymore. The width of the 3.5" floppy drive slot is about 9cm, perhaps you could use that to estimate the screen dimensions?
@@jjoonathan7178 I'll try it, thanks
Hi in the 1985 HP8510A was the first Vector Network Analyzer based with microprocessor Technology! And the base for the successor 8753A,B,C,D,E,ES the industry standard VNA in the world! Very beautiful instruments, compliments for the nice video! ❤ I love HP old instrument.
I already knew this. But liked the content nonetheless. Keep em coming ( :
Holy batmans that's a lot of componentry and processing power for the front panel. Probably whole Keithley 2001 BOM costed less than front panel alone here :-)
Prompted by EMPossible's excellent video on Coupled Mode Theory: ruclips.net/video/V4A8yEnuTKk/видео.html
It's the same for "regular" stripline couplers, not just couplers optimized for use as a quadrature hybrid: ruclips.net/video/mkGd1uEsAU0/видео.html
Excellent! This is very useful. Do you plan something like this, for the Advantest R3273 too? I know, you developed something for the R3273 Input Attenuator. I have a R3273 here, that has wrong Attenuator and YIG Filter Cal Data.
Hi! I went and uploaded my R3273 code here: github.com/jjoonathan/R3273-calibration . This should help with level correction, but I'm afraid I never figured out YIG correction due to the existing YIG calibration being quite satisfactory in contrast to the HP8565E in the video. I pointed out my best lead, though: there is a suspicious unknown "field5" in the cal data that might just hold the yig cal. Good luck!
@@jjoonathan7178There is a Service Menu for YTF Calibration. But without Adjustment Manual, I dont know exactly what to do there. Also, theres a routine buried deep inside the firmware, to save and read back all Factory Calibration Constants as .csv Files, to the SD-Card. But no one found out, how to trigger this yet...
@@jjoonathan7178 There is a Service Menu for YTF Calibration. But without the Adjustment Manual, I dont know exactly what to do in there. There is also a Routine buried deep inside the Firmware, that writes and reads back all Factory Calibration Constants as .csv files, to the SD-Card. But no one found out, how to trigger this yet...
🙃 Promo*SM
8510B Vector Network Analyzer without S-Parameter Test Set can't measure any paramiters. Thet is rigth?
Right, you need all 4 boxes but you can mix and match to meet your requirements. The screen and IF (box below the screen) stay roughly the same but you can choose 8340/8350/8360 as your source and 8514/8515/8516/8517 as your test set. Both the source and test set need to support the frequency you want to measure. If they don't match exactly that's ok, they just operate on frequencies they both support. There are lots of options in this family.
@@jjoonathan7178 thanks a lot
Good work!
If you get tired of that RTO1024, then pls dont dump it in one of Dave containers, instead throw it my way... kudos with your GW PSU
Can this do logmag for -db ? 50 Homs input &output ?
Excellent demo 👍.
very cooool. i like buttons.
shit look like fallout
What's the music?
Both the music and XY are from the "YouScope" demo. It packs them on separate channels, which purists would probably call cheating, but YouScope's graphics are better than other staples like Oscillofun and that's why I went with it. If you want to find the music, just search YouScope on youtube, but if you want to try the setup yourself google for the original FLAC file.
Hallo, endlich mal eine vernünftige Anwendung für die Pausen :)
Any reason why you went this instead of Rigol or siglent?
Hello! How I can use it as Current source ?
The problem with using a power supply as a current source is the output capacitor. You can set a 1mA limit, but if the output capacitor is charged, it can discharge much more than 1mA without being limited. You might even see sparks with a 1mA "limit"! Instead, either use a quick custom circuit (voltage plus resistor, LDO regulator across a series resistor), an actual current source instrument, or a SMU.
Thank you for the review, well done. These things have really gone up in price so still debating one.. quick question, do you find the variable 0-1A on channel 3 and 4, especially CH4... limiting being a max of 1A? I personally feel that's the biggest downfall of this PSU.
Yeah, it made me a bit nervous, but I've always been able to find a job for the runt channel. There's usually at least one low-power, low-voltage job around. I suppose it's largely a function of what you're doing, and most of my projects at the moment are small modules rather than board bringup or power electronics. I've been eyeing the NGP-814, but it'll have to wait until I actually outgrow the GPP-4323, and that hasn't happened yet.
@@jjoonathan7178 I agree, I think I will have more smaller jobs for the 3rd or 4th channel than I think. Having a variable, lower current channel, offers more flexibility than a higher fixed current channel. That being said.....with the almost $150 increase of the 4323, I can get two 3303X-E's...for one 4323.....so there lies the dillema. I'd rather have only 1 psu right now, but it's a PSU...lol, always room for more power. My gut says go with 4 variable current outputs in one unit, than with 2 separate PSU's. Plus, the 4323 has standard BNC-banana plug width terminals.
I hate the lack of O*P physical LEDs, they are so much better or showing fast transitions, but everything else looks good, how fast and noticeable are the Over indicators? I am looking to upgrade my GPD-3303s, love it. Can you set it to not turn off the channel on ocp? Also,, ummm keithley 2612!! envy
😀Around 30 years ago, a technical colleguean have built a 3U rack in order to made a 10 Mhz distribution. This was oscillating.....the main reason was because the outputs wasn't loaded. Generally amplifier specs output are not given for SC to open.....but up to a SWR 2 to 3 for example. That I see is that the outputs are open on the box.
Are you still liking the supply. Im seriously considering buying one very soon.
Yep, still liking it!
Thx for sharing. If you suspected the cables why not replace the cable with coax. I can appreciate what you did, and rational but you could have just as easily filtered out what was naturally there espcially when a swap of the cables would have been so easy
Activating the scope filter took all of 5 seconds, while chasing the RF out of the cables would be a lot harder than just swapping the 6in banana leads for coax. 1cm of banana jack is more than enough for 2.4GHz to get in (and even substantial 100MHz), so I'd have to bring both the power supply and oscilloscope into a EMC chamber and I'd have to use an EMC-sanitized camera and so on. But why would we even want such a measurement? We are not going to be using the supply in an EMC chamber, we are going to be using it on a bench, where any banana-jack supply is going to be crawling with 2.4GHz and all other kinds of RF, just by virtue of having non-coaxial output. We should design the power networks of our circuits to handle RF hitchhiking on the DC inputs rather than try to produce RF-free inputs. Decoupling is much easier than generating and shipping RF-free DC.
Is there a tracking feature?
Thanks for your review. Are you still satisfied with your unit? Are there any noise or humming sounds coming from the Unit? I have the OWON ODP3033 newly purchased at home, but the humming sound is so annoying so I`m considering to return it and upgrade to the GWInstek. Any other issues with GWInstek? Thanks i advance!
Yep, it still works just as well as it did on the first day. No hum, no egregious fan revving, it just works. I'd still recommend it!
@@jjoonathan7178 Thanks for your fast response. I`m waiting for reply to my message about returning the Owon power supply from eleshop customer service. As soon as i got the RMA Label and know the right procedure for changing to the another unit I really will take the GwInstek into closest consideration. It seems a good unit for the price of approx 605€ including LAN-option.
I'm using GPP-4323, but channel 1 started to not output when there was no problem. Do you have any information about this issue?
Sorry to hear that! No, I haven't seen that issue. Whenever I trip OCP (for example) it just turns off the green channel light and turning the channel back on resets the "fuse." Sounds like your unit has a problem. Time for warranty -- or a project. If it turns into a project please think about recording a video, I'd love to watch!
@@jjoonathan7178 Thank you for your reply I sent to the service waiting for a return.
I am about to buy one and looking at other reviews this amp is always there so thank you for this info as i will eliminate it 👍🏻
Did GW-Instek pay you for this promotion? XD Just kidding, I love this PSU and thanks for sharing this video.
Hello jjoonathan , interesting things . How come you got so many devices in your lab ? Would you please make a video of your inventory ? It would be interesting and i think it would attract more ppl into your channel . Cheers from across the pond .
I just use coloured heatshrink
I love colored heatshrink, but you need the right color/size and compatible substrate. It wouldn't work for buttons and panels and I wouldn't bet on tapering binding posts either -- but yeah, if you meet those requirements it's the best!
@@jjoonathan7178 Yep, certainly some applications are more difficult than others, so I'll keep an eye out for these style of pens. But if you need to resort to lacquer or epoxy coating anyway then I'm sure you can also get heatshrink to stay in place. And there is quite a wide range of heatshrink colours available cheaply these days (but possibly of lesser quality). Another solution if you have the tools is to 3D print, or CNC cut, some coloured plastic rings - e.g. to replace the lower part of the binding post.
Sturdier than epoxy ! Crystallized carbon ?
Yeah, Real Engineers color their test clips by pumping them to high vacuum, expitaxially growing a layer of diamond, and patterning the geometry to achieve structural coloration.
I would have a question about this power power supply output terminals. When I have a look what is sold today all PS have terminals "inside" of the supply but yours stick out. Is it another version? What is diferent?
I think there is a European version without binding posts because having possibly exposed metal at 32V does not comply with certain regulations.
@@jjoonathan7178 I have orderd it so I ll tell you soon. I hope for binding posts, I don't know about any regulation that would prohibit the usage of them.
@@thecuc007 Yes, unfortunately I can't be more specific because I am just passing on a rumor that I heard to explain a similar instance of one model having binding posts and a sister model lacking them. "Europe" isn't a specific country and "regulation" isn't a specific law, so I don't have much to go on one way or the other. I don't actually use spade lugs very often, but I slightly prefer binding posts and it sounds like you do too, so I hope that's what you get! Still a good supply either way.
GW Instek are Taiwanese not Thai.
You're right, my bad!
Great video! I noticed the banana terminals on that are not stock. It looks very convenient having them color coded to match the display. Did you make those or buy them? If you bought them, please tell me where! Also noticed the colored dots on the channel selection buttons, nice touch!
You mean like these www.banggood.com/BNC-Male-to-Dual-Binding-Posts-Banana-Connector-Plug-Test-Adapter-p-1166778.html?cur_warehouse=CN&rmmds=search
I made a video showing how: ruclips.net/video/RkpahjgQoiA/видео.html
Was looking for a review on the GPE-2323, but here I am anyway. The channel order may be because Ch3 and 4 are "aux" rails, 1 and 2 are "mains"
Yeah, that sounds plausible. The reason for the "culture" comment was because of an earlier experience with a Rigol DS4014 where I learned that it had two blue channels (one teal, one saturated blue) for cultural reasons -- evidently in China (or some subset of the East) teal is considered conceptually distinct from saturated blue in the same way that we'd consider green conceptually distinct from blue. My previous GPD-3303S had channel 1 on the right and channel 2 on the left, so funky channel layouts are a trend with GW Instek, and I'm not entirely convinced that aux positioning entirely explains the overall trend, but I certainly don't know for sure. It's fun to speculate.
@@jjoonathan7178 Interesting. Didn't know about the teal thing.
how much did you pay for it
About $564 + $30 LAN option from tequipment.net