hybridfree/eevblog-posts huggingface dataset:
Budget RF Generator with pulse modulation for EMI/EMC pre compliance - Page 1
Forum section: electronics / testgear

author: candrian
author_rank: Regular Contributor
timestamp: November 14, 2024, 09:51:20 am
content: Hello,I want to dive a bit deeper in EMI/EMC troubleshooting so I decided to start building my own pre-compliance setup to troubleshoot and experience at home. This will give me more hands on experience and knowledge while also building the setup. I would like to run MIL-STD 461 RS103 & RE103 or what ever close to this I can achieve with budget equipment.The setup I already have:Spectrum analyzer HP 8593ERF Power Amplifierhttps://www.aliexpress.com/item/1005005875798281.html?spm=a2g0o.order_list.order_list_main.29.17431802cCUX5vLNA which can be used with nearfield probeshttps://www.ebay.com/itm/296291332327?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=zpduvgujqik&sssrc=2047675&ssuid=n3IxBbJTSBa&widget_ver=artemis&media=COPYNear field probeshttps://www.ebay.com/itm/165747839073I also have a nano VNA which I mostly use for antenna tuningWhat is missingTem Cell. I'm planing to build something similar to the one described in this articlehttps://incompliancemag.com/application-of-thrifty-test-equipment-for-emc-testing/?_gl=1*1lxz9kl*_up*MQ..*_ga*MTE2Njk1NDA3Ny4xNzMxNDE1ODk2*_ga_P5ZH1PZM1T*MTczMTQxNTg5NS4xLjAuMTczMTQxNTg5NS4wLjAuMA..Signal generatorSo what I'm looking for is suggestions on a budget RF generator which can also support 1Khz pulse modulation which is required by MIL-STD 461The frequency range of interest is from a few Khz to a few Ghz.The low budget devices I have found as candidate RF generators are the following:Boards using the ADF4351 such ashttps://www.ebay.co.uk/itm/395720812824?chn=ps&_ul=GB&_trkparms=ispr%3D1&amdata=enc%3A1j-3cvr9XT3yJv-K6M41RTQ4&norover=1&mkevt=1&mkrid=710-170020-507995-5&mkcid=2&itemid=395720812824&targetid=325425753764&device=c&mktype=pla&googleloc=9067668&poi=&campaignid=20787991645&mkgroupid=157350414882&rlsatarget=pla-325425753764&abcId=&merchantid=505744633&gad_source=1&gclid=CjwKCAiA3Na5BhAZEiwAzrfagGnT1Q_RYC8WIvECw2tSUvrbnjg5sd5Top4lYiGL2b3OcnWemHxItxoCb5cQAvD_BwETinySa but if I'm not mistaken there is no option for pulse modulation.hackrf one which also doesn't support pulse modulation and as per my understanding TinySa has a better sine wave generator with less harmonics.
Keysight 256GS/s, 80GHz Bandwidth M8199B 2-Channel AWG Overview, Teardown & Exp. - Page 1
Forum section: electronics / testgear

author: Hugoneus
author_rank: Frequent Contributor
timestamp: November 11, 2024, 02:25:30 am
content: You can watch the video here: [~45 Minutes]youtu.be/rVJwcZavr9UIn this episode Shahriar takes a look at another world's first instrument: Keysight M8199B 256 GSa/s Arbitrary Waveform Generator. With over 80GHz of analog bandwidth, this high performance ARB is intended for design development at 160GBaud and above:https://www.keysight.com/zz/en/product/M8199B/m8199b-256-gsa-s-arbitrary-waveform-generator.htmlThis video is organized as follows:00:00 - Introductions00:54 - ARB comparison, performance metrics, key parameters03:59 - DAC design, chip layout, system level considerations, overall instrument architecture14:42 - M8199B interfaces, detailed teardown, sub-block overview, output module analysis30:14 - Demonstration setup, M8199B, DCA-X, 120GHz remote sampling use-case33:29 - Software interfaces, I/Q tools, signal generation & calibration36:29 - DCA-X eye-diagram captures, 64GBaud to 200GBaud, NRZ, PAM4, PAM844:09 - Keysight captured eye diagram & ultimate system performance45:50 - Concluding remarks

author: mawyatt
author_rank: Super Contributor
timestamp: November 11, 2024, 06:21:54 pm
content: Thanks for showing this remarkable AWG, quite impressive indeedWay back we were interested in the DAC which ended up within the M8190A, which was called Griffin. Our interest was for "special signal" generation for "special applications". This DAC was in SiGe technology and was quite advanced when we were first introduced to it back in ~2009 at the IMS. It could produce NPR results better than 75dBc which we were shown during a personal meeting at the IMS!! Fun story about how this came about over a brew, will discuss if interestedHere's a LR Crop Image from way back of Griffin.Best

author: Hugoneus
author_rank: Frequent Contributor
timestamp: November 12, 2024, 11:54:37 pm
content: Quote from: mawyatt on November 11, 2024, 06:21:54 pmVery cool!

author: Construct
author_rank: Contributor
timestamp: November 13, 2024, 06:45:49 pm
content: Incredible video, as usual.I appreciate these high information density, low noise videos more and more as the years go on.

author: Hugoneus
author_rank: Frequent Contributor
timestamp: November 14, 2024, 02:20:53 am
content: Quote from: Construct on November 13, 2024, 06:45:49 pmThank you! And thank you for recognizing the effort which goes into producing high information density.
Uni-T Wavegenerators 1022X-PA / UTG2025A - Burst and other issues - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: October 01, 2024, 07:51:48 pm
content: I had the UTG 1022X-PA, and now i have the UTG2025A.On the first one i observed, that the burst mode was not working right away, but then somehow it did. Now i have the UTG2025A (V1.23.07), and i found out, it has the same issue. It takes quite a few fiddeling to get it working, and i havent figured out yet what excact steps have to be taken. It has to be done after every reboot.I bough the 2025, because it had some more trigger out / in and sync in/out as the 1022. But unfortunately i just found out that sync is not synchron. Id does drift with time (see picture). The device ran for hours already. These are the settings:QuoteAnother things i discovered (the first one in less than 2 minutes after turning it one for the first time:When pushing the button for "Upper Limit", and entering a value with the Unit, the value stays activated, and will be adjustet if you turn the knob. After pushing a button for another option, and setting it up, the "Upper limit" becomes automatically activated, if you scroll over it with the knob.On other values too: entering the unit, the value is still active for changing it.Burst does not start on its own when channel is activated after starting the device. And if it runs, it has time delay compared to the sync out.The blue trace is the sync out. CH1 and CH2 are also CH1 and CH2 on the awg.This is a kind of a review, and a question, if something could be done about the issues.Edit:Another device that does not only have minor bugs, but major bugs:"Modulation in" and "FSK Trig" gives out +-1V spikes when not used.Sweep setup to start at 30kHz and stop at 400Hz, manually started, starts at 30kHz, stops at 15 kHz. After another trigger, sweeps from 15kHz to 400Hz, jumps back to 30kHz and sweeps to 15kHz.

author: nctnico
author_rank: Super Contributor
timestamp: October 01, 2024, 08:09:04 pm
content: It can be expected for the sync output to drift on cheaper devices. On some of the other lower end models, it isn't even specified at all.

author: eTobey
author_rank: Super Contributor
timestamp: October 16, 2024, 03:16:49 pm
content: Output is beeing driven of the UNI-T UTG2025A without beeing activated, probably because of noise.And its even measure through a voltage divider, so its twice as high in reality...And that happend when my microcontroller was connected.

author: eTobey
author_rank: Super Contributor
timestamp: November 13, 2024, 09:41:38 pm
content: Fiddling around with the circuit, going through my code, almost going insane, as it has worked before without issues. Then i realized, that the amplitude of channel 2 has been changed without doing anything from my side, except for turning off and on the device.
T3DSO4000L-HD low profile (as any SDS4000 HD ??) - Page 1
Forum section: electronics / testgear

author: hpw
author_rank: Frequent Contributor
timestamp: November 13, 2024, 03:40:07 pm
content: LeCroy announced T3DSO4000L-HD low profile with man options already included... with only HDMI resolution of 1280*800With 10MHz output and inputIs there any equivalent Siglent SDS4000 HD coming too?See LeCroy T3DSO4000L-HD datasheet attached

author: tautech
author_rank: Super Contributor
timestamp: November 13, 2024, 07:50:34 pm
content: 4 and 8ch SDS6000L have been available to the west for a year or 2 now.https://www.eevblog.com/forum/testgear/siglent-sds6000l-2ghz-12bit-8-ch-(china-only)/https://int.siglent.com/products-overview/sds6000l/Think headless SDS6000A but in 4 or 8ch.
Searching for Kniel 60.30 Electronic Load documentation - Page 1
Forum section: electronics / testgear

author: joost
author_rank: Newbie
timestamp: November 14, 2024, 09:34:55 am
content: I own a 25+ year old Kniel electronic load.I am looking for information, user and service manuals, etc. for this device.Manufacturer Kniel is not able to help:"Unfortunately, we cannot provide you with any documents on E-Last 60.30place.The E-Last 60.30 has not been produced for more than 25 years."The first tantalum capacitors smoked out and are successfully replaced.Next parts to replace are the potentiometers.Any information about this device would be helpful in keeping it alive.Joost
OWON CM2100B - Any buyers with regrets? - Page 1
Forum section: electronics / testgear

author: NE666
author_rank: Frequent Contributor
timestamp: November 13, 2024, 02:09:56 pm
content: Hello.Just wondering whether there are any obvious reasons not to purchase this, based on my use case. I neither expect nor require a 'high' degree of accuracy, just for it to perform the basic functions advertised for it, for it to have some level of consistency, and for it and its software to not be flaky. I've seen nothing particularly ominous in any of the threads here I've read but since I have an urgent need for a current clamp and I therefore need to pay top-dollar with Amazon UK for it, I thought I'd ask.I'm only really interested in;- DC current measurements, in the order of a few amps (<10A). A resolution of a couple hundred ma is fine, as is limited accuracy. Consistency would be good however.- Data logging via bluetooth and the using the Owon-supplied mobile app. I'd like to be able to log current drain over a period of an hour, sampling every 1 to 2 minutes, unattended.
Using Noyafa cable/power-line tracers - Page 1
Forum section: electronics / testgear

author: 5U4GB
author_rank: Super Contributor
timestamp: November 11, 2024, 03:25:24 am
content: Noyafamakes a whole range of cable tracers, one of which wasreviewed by Dave. The products are actually reasonbly decent, problem is the instructions are pretty dire. I got an NF-825 back when they were crowdfunding it and recently had to use it for power line tracing rather than the usual network tracing, and at this point the wheels came off.The docs talk about the transmitter having a "Strong electricity tracking" (i.e. 110V/220V) and "Network cable tracking" setting, and the receiver having a "Tracking" button. See if you can find them:By a process of trial and error I've come up with the following results:TypeTransmitterReceiverResultCat5LiveScan - RedStandard beepLiveScan - Green-ScanScan - Red-ScanScan - GreenHigh-pitched beepPowerLiveScan - RedStandard beepLiveScan - Green-ScanScan - Red-ScanScan - Green-So it looks like "Live" puts a signal onto both the mains and Cat5 outputs (according to the docs 157kHz) while "Scan" only puts a signal onto the Cat5 outputs (according to the docs 455kHz). In other words Live + Scan - Red is for mains cable tracing, Scan + Scan - Green is for Cat5 tracing.If anyone has any more insight on this I'd love to hear it. It's quite a useful piece of test gear, just let down by the docs.

author: 5U4GB
author_rank: Super Contributor
timestamp: November 14, 2024, 10:10:40 am
content: As a followup, this recently allowed me to fairly precisely trace out a wiring run where two different NCV's wouldn't even give a reading. Saved me about half a day of speculatively dismantling equipment to try and find it from the other side of the wall, it was exactly where the tracer said it should be.
Screen protectors?  Siglent SSA3021X Plus  - Page 1
Forum section: electronics / testgear

author: Battle
author_rank: Contributor
timestamp: November 13, 2024, 04:45:09 pm
content: Has anyone found a decent screen protector that will fit Siglent SSA3000x series? I'm assuming most of the other products like sva have the same size screen too.

author: KungFuJosh
author_rank: Super Contributor
timestamp: November 13, 2024, 06:53:36 pm
content: I buy iPad screen protectors and cut them to size.

author: coromonadalix
author_rank: Super Contributor
timestamp: November 13, 2024, 07:27:35 pm
content: same here ...the ssa xxxx are 10 inch diagonal
Any experience with DF8100A Dual-Channel VI /LCR meter? - Page 1
Forum section: electronics / testgear

author: RAPo
author_rank: Super Contributor
timestamp: November 10, 2024, 04:28:46 pm
content: I was browsing on Banggood and saw this device:DF8100 DF8100A Intelligence Dual-Channel VI Curve Tester LCR Meter Snelle Foutdiagnose 5-21000Hz 1-51000Hz.I didn't see any reviews, has anyone some experience with this device?
R&S SMU200A hard disk head crash - Page 1
Forum section: electronics / testgear

author: and.pas
author_rank: Newbie
timestamp: October 03, 2024, 07:21:11 am
content: Hi,I have an SMU 200A which worked well until the hard disk experienced a head crash some days ago...I extracted the disk, it's a standard SATA 2.5", so it can be easily replaced with a modern SSD.The problems are:- obtain a disk image- enable licenses for installed options- perform calibration if necessaryAny experience about this?ThanksAndrea

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 03, 2024, 09:17:55 am
content: I checked google (and xdevs), but no found recovery disk images..However, there was firmware (applications) on xdevs.https://mega.nz/folder/3HBzQTSJ#10gsXSHxpXYERrGD7w66wgLet's install the winXP (Pro would be better) and applications and hope it works.Apparently, if anyone has a working hdd, they can create a recovery disk from the boot manager. If you wait, you might find it.

author: pdenisowski
author_rank: Super Contributor
timestamp: October 03, 2024, 12:17:19 pm
content: I have the following- 14057384T0100_ FMR9GP0101.iso (SMU Recovery Disk)- RECOVERY_DVD_AIO_FMR679_SMx_0350.isoCombined size is over 3 GB. I have never tried these (and don't have an SMU to try them on) and I couldn't provide any support for this, but I'm happy to upload them somewhere if that would be helpful.Might be worth contacting R&S support first - they might be able to provide a direct link or other docs for the recovery process.

author: magic
author_rank: Super Contributor
timestamp: October 03, 2024, 03:05:07 pm
content: What's the condition of the disk?

author: and.pas
author_rank: Newbie
timestamp: October 07, 2024, 07:29:06 am
content: Thanks,we could give a try to these restore disks!The disk is completely inoperative, BIOS doesn't detect it at all, continuous clicking and metal friction noises.Andrea

author: Ice-Tea
author_rank: Super Contributor
timestamp: October 07, 2024, 07:52:07 am
content: If I'm not mistaken the licence keys are on the chasis behind the cover. Not sure tho...

author: TRN
author_rank: Unknown
timestamp: November 10, 2024, 10:42:15 pm
content: Quote from: pdenisowski on October 03, 2024, 12:17:19 pmHiMy SMU - HDD crashed as well, so it would be very helpful, if you could upload the two .iso files somwhere.Thanks in advance
Rigol DHO0804 starts up with large, varying offset (bias) voltages - Page 1
Forum section: electronics / testgear

author: devinw
author_rank: Newbie
timestamp: November 08, 2024, 04:50:20 pm
content: Like the title says, when I power the unit up, the bias voltages on the channels is always different, especially channel 2. 2 has been anywhere from 100 to 250mV, and yesterday it was 800mV! I realize this is not a DMM, but 800mV seems simply outrageous for any oscilloscope. I realize I can enter in a bias voltage for each channel, but that doesn't help if it boots up to a different bias each time. Is there some internal cal it runs when starting up that is screwy?Anyone else experience this? Or should I send this thing back?

author: Fungus
author_rank: Super Contributor
timestamp: November 08, 2024, 06:19:13 pm
content: Have you run the calibration?

author: devinw
author_rank: Newbie
timestamp: November 08, 2024, 08:30:20 pm
content: Quote from: Fungus on November 08, 2024, 06:19:13 pmI just tried the self cal. After the cal, all channels were looking good with low offset. We'll see how it is on the next bootup.

author: devinw
author_rank: Newbie
timestamp: November 09, 2024, 06:46:49 pm
content: I've had the unit powered on for a few minutes and CH1 is averaging about 4mV bias, and CH2 is 60mV. The 60mV one was under 1mV yesterday after self-cal and using it for a few hours. I think I'm sending this thing back unfortunately.

author: Fungus
author_rank: Super Contributor
timestamp: November 09, 2024, 07:31:03 pm
content: You have to let it warm up, but... 60mV sounds like a lot to me after "a few minutes".Does it go away with time?

author: TurboTom
author_rank: Super Contributor
timestamp: November 09, 2024, 11:38:04 pm
content: At what input sensitivity settings are you observing the offsets?

author: Fungus
author_rank: Super Contributor
timestamp: November 10, 2024, 07:09:30 am
content: Quote from: TurboTom on November 09, 2024, 11:38:04 pmGood point! I assumed this was at high sensitivity but every time I assume I make an ass of myself.60mV at 10v/div would be perfectly normal.
UNI-T UPO2072E Don't boot - Page 1
Forum section: electronics / testgear

author: lisandromatias
author_rank: Newbie
timestamp: November 09, 2024, 09:38:13 pm
content: Hello, my name is Lisandro and I am new to the forum.In 2021, I purchased a UNI-T oscilloscope model UPO2072E. I didn't use it much (because I honestly didn't need it) and this week when I wanted to turn it on, it won't boot. The oscilloscope has less than 3 hours of use.The oscilloscope turns on, a legend appears that says "system loading", the UNI-T logo is displayed, it performs a verification (the sound of relays switching is heard) and then the screen brightness drops a little, and it stays there...I tried to update the firmware from a USB stick but when I do, I get a message saying "Update file not found". I downloaded the firmware from the official website, but I'm not sure it's the right one. I formatted the memory in FAT32, FAT, NTFS and exFAT, but none of them worked, and I also tried other memories.This is the link of the official page:https://instruments.uni-trend.com/products/digital-oscilloscopes/UPO2000EThere is no firmware to download in the section SOFTWARE&FIRMWARE.I tried the firmware that appears on this page whose name says UPO2000 or MSO2000, but none of them worked.https://instruments.uni-trend.com/search?keyword=firmwareIf anyone happened to it or knows how to solve it, or can provide me with the appropriate firmware for this device, I would be more than grateful!I attach screenshots of the team and the messages.Thank you very much in advance. Greetings.
BSIDE ZT302 multimeter not shipping to my country but ZT301 does? - Page 1
Forum section: electronics / testgear

author: ponder
author_rank: Newbie
timestamp: November 09, 2024, 06:57:44 am
content: I'm looking at the BSIDE ZT302 AliExpress but they all say "This product can't be shipped to your address.Select another product or address. " but if I select the ZT301 model the same page it does ship to my country? Why would the one ship and not the other?https://www.aliexpress.com/item/1005007244256495.html?spm=a2g0o.productlist.main.11.b96472Ze72Zeuw&algo_pvid=efba89f6-8fec-4d4b-8a58-efaca2860b3d&algo_exp_id=efba89f6-8fec-4d4b-8a58-efaca2860b3d-5&pdp_npi=4%40dis%21ZAR%21746.41%21265.74%21%21%2140.98%2114.59%21%402103834817311101625326287e28f4%2112000039929659582%21sea%21ZA%216170773772%21ABX&curPageLogUid=1r4qlxjWIL1U&utparam-url=scene%3Asearch%7Cquery_from%3AAny recommendations for other meters in the same price bracket?

author: Aldo22
author_rank: Super Contributor
timestamp: November 09, 2024, 07:33:12 am
content: These are available under various brands.Zoyi, Aneng, Richmeters...Have a look herehttps://www.aliexpress.com/item/1005006619844667.html

author: ponder
author_rank: Newbie
timestamp: November 09, 2024, 07:43:47 am
content: Thank you, much appreciated!

author: ponder
author_rank: Newbie
timestamp: November 09, 2024, 08:09:10 am
content: I think I'm gonna get the ZT301 as it has temperature instead of square wave function, it's 8000 count though vs 9999.<$10 + free shipping sound like a deal and anything is better than my ~40yr old UniVolt DT-830

author: robert.rozee
author_rank: Frequent Contributor
timestamp: November 09, 2024, 09:48:08 am
content: Quote from: Aldo22 on November 09, 2024, 07:33:12 amworth noting is the available current ranges on different models. from the above link:ZT301:800uA, 8mA, 80mA, 800mA, 8A, 10AZT302:100uA, 1mA, 1A, 10AZT303:200uA, 2mA, 20mA, 200mA, 2A, 10Athe ZT302 (10,000 count) has a largeholein the current coverage, withno10mAor100mA ranges. i remember this being noted a while back on the forums when these meters were branded as Aneng. this makes the ZT301 or ZT303, depending on your needs, a far better bet.cheers,rob :-)

author: IC_Toaster
author_rank: Regular Contributor
timestamp: November 09, 2024, 11:00:04 am
content: Quote from: Aldo22 on November 09, 2024, 07:33:12 amIn fact, I think Zoyi manufactures these multimeters.https://zotektools.com/es/products/zoyizt-301/https://zotektools.com/es/products/zt-302/https://zotektools.com/es/products/zt-303/

author: Aldo22
author_rank: Super Contributor
timestamp: November 09, 2024, 11:19:59 am
content: Quote from: IC_Toaster on November 09, 2024, 11:00:04 amStrictly speaking, Zoyi is also just a brand.The manufacturer is ZOTEK Instruments Co, Ltd.https://zoyitools.com/the-most-comprehensive-explanation-the-differences-between-zoyi-and-zotek-and-zoteks-40-year-journey/
What device is this? - Page 1
Forum section: electronics / testgear

author: pcee
author_rank: Regular Contributor
timestamp: November 09, 2024, 07:48:14 pm
content: Here's a challenge for the collective genius of this group. I'm trying to replicate a lab setup, and all I have to go on is some grainy pictures. I've been able to identify most other components, but not this one.Based on its location in the lab, I suspect it is a variable power supply, possibly AC, maybe even a bench variac. The resolution is just low enough that I can't make out the manufacturer.Can any of you?

author: factory
author_rank: Super Contributor
timestamp: November 09, 2024, 07:53:38 pm
content: Google image search suggests it's a Chinese made battery load tester.https://www.ebay.com/itm/122893917064David

author: Kean
author_rank: Unknown
timestamp: November 10, 2024, 01:37:25 am
content: Yep, those look like ZKE Tech EBC or EBD models. Possibly an EBC-A20H.I believe that the EBC models are charge and discharge, and EBD are discharge only.

author: pcee
author_rank: Regular Contributor
timestamp: November 10, 2024, 02:58:58 am
content: Quote from: factory on November 09, 2024, 07:53:38 pmNailed it. Thank you!One of these days I’ll remember that google sometimes gives better results than other search engines…
Does the diode mode of the multimeter vs Curve tracer - Page 1
Forum section: electronics / testgear

author: Orxan1989
author_rank: Newbie
timestamp: November 07, 2024, 05:51:01 pm
content: Does the diode mode of the multimeter (with the red probe on the ground) replace the curve tracer in integrated circuit testing? If not, why?

author: coromonadalix
author_rank: Super Contributor
timestamp: November 07, 2024, 06:07:20 pm
content: nota curve tracer use a scope, that way you see the dut specs and how it behave, and if it leak ... a meter will not show it like this, on some it help you test a zenner tooa meter will test in voltage, mostly up to 3v, or some eevblog ones or some others who can output 15 vdc, you get the junction voltage of a diode 0.3v0.6v etc .. can test some zenners, but there is a limita meter in ohms you may see if you are in forward or reverse if you see conductionas tools: get both of them, learn on how to interpret read values, tests them, interference of parts in parallel on / in the circuit etc ...you have 2 questions here about curve tracer, pls avoid multiples thread .... i know it is not identical, but be careful ...

author: Fungus
author_rank: Super Contributor
timestamp: November 08, 2024, 07:33:31 am
content: Quote from: Orxan1989 on November 07, 2024, 05:51:01 pmNo.Because it doesn't show a curve on a screen.
Curve tracer information? - Page 1
Forum section: electronics / testgear

author: Orxan1989
author_rank: Newbie
timestamp: November 07, 2024, 12:47:45 pm
content: Hi. Hello. I just joined the forumThank you in advance.What is the difference between the curve tracker in the link and the expensive curve tracker?Does it work in finding faults in the link?https://aliexpress.ru/item/1005003504252539.html?sku_id=12000026087459885Can I find any fault on the laptop motherboard or the PlayStation motherboard with this device?

author: ebastler
author_rank: Super Contributor
timestamp: November 07, 2024, 02:27:10 pm
content: A proper "curve tracer" has an additional output which can drive the base or gate of a transistor with a current or voltage in multiple steps, so you can capture a full set of characteristic curves of a transistor in one go. The device you linked to does not seem to provide that. It also has limited control over the voltage and current ranges, in a few coarse steps.But I think you only want to check two-pin components (resistors, capacitors, coils, diodes, or pairs of transistor pins) in-circuit, right? The device should be able to do that. Because you can apparently set different drive voltages, it should be able to test components in low-voltage circuits without causing damage.I don't know your level of experience. Just to be on the safe side, two more notes -- apologies if this is already clear: You will have to learn how to interpret the resulting I(U) curves, especially in situations where more than one component in the circuit affects the curve in a parallel or series configuration. And you will need to connect an oscilloscope to the device to see the results!

author: RoGeorge
author_rank: Super Contributor
timestamp: November 07, 2024, 02:32:39 pm
content: Quote from: Orxan1989 on November 07, 2024, 12:47:45 pmNo.

author: ebastler
author_rank: Super Contributor
timestamp: November 07, 2024, 02:43:25 pm
content: Quote from: RoGeorge on November 07, 2024, 02:32:39 pm"Can I find each and every fault?" No."Are there any faults I can find with this?" Yes.

author: RAPo
author_rank: Super Contributor
timestamp: November 07, 2024, 02:57:07 pm
content: The apparatus in the link you provided can compare two components.If you have a healthy PCB and a non working PCB you can try to discover where the difference is.I wouldn't call this a curvetracer, but a component tester. (At least Hameg calls it that way).Quote from: Orxan1989 on November 07, 2024, 12:47:45 pm
Junctek JDS6600 bad waveform - Page 1
Forum section: electronics / testgear

author: MariuszD
author_rank: Regular Contributor
timestamp: November 06, 2024, 04:47:12 pm
content: Hi,I have bought this cheap Chinese generator recently and it has bad distortions below 100Hz.Settings: sine wave, amplitude 5V, offset 0V.At 1Hz waveform looks like randomly flipped half sine waves. At 1kHz it is correct.My question for anyone who has JDS6600. Is your generator usable at 1Hz?

author: Aldo22
author_rank: Super Contributor
timestamp: November 06, 2024, 06:28:31 pm
content: Are you sure it's not the scope settings? (5 s/div, ROLL mode)Is it the same with e.g. 200ms/div?

author: MariuszD
author_rank: Regular Contributor
timestamp: November 06, 2024, 09:28:18 pm
content: Scope is ok, and I know how to use it. I found this error looking at irregular LED blinks.I used 5s/div to show random nature of this weird behaviour. With 200ms/div it looks like perfect rectified sine wave or normal sine wave.

author: Atlan
author_rank: Frequent Contributor
timestamp: November 07, 2024, 05:41:39 am
content: Jdm doesn't have software for repair? Feeltech, you have software and there is an item for correcting the signal flow.
DSView time reference not at trigger position   - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: November 06, 2024, 09:12:02 am
content: Hi,there has to be a way, to have the trigger beeing the reference. But i cant find a way, and i couldnt find anything about it in the manual.

author: ebastler
author_rank: Super Contributor
timestamp: November 06, 2024, 03:30:24 pm
content: This was submitted as a Sigrok feature request in 2019. (See the Google hit below -- Sigrok's actual bug tracker seems to be offline at the moment.) It might still be unresolved in Sigrok and DSView?QuoteEdit: Ah, I just saw that you have already found the DSView issue tracker athttps://github.com/DreamSourceLab/DSView/issuesand have submitted this item. That's probably the best place. And looking at the slightly earlier entries there, DSLogic seem to follow up actively on submissions.

author: eTobey
author_rank: Super Contributor
timestamp: November 06, 2024, 09:46:35 pm
content: Quote from: ebastler on November 06, 2024, 03:30:24 pmYeah, i am quite active ;-). I even made a workaround script, that even adds some automated measurement. Its done via a decoder it shows the time for the right edge. The trigger time has to be set everytime, though.The script has to go into "C:\Program Files\DSView\decoders".UPDATE:I updated the script: now the reference can be any edge of another channel. Also i interval measurement.
Fluke 5790A/5720A/5700A Air Filter, part number 813493 - Page 1
Forum section: electronics / testgear

author: TWG
author_rank: Newbie
timestamp: November 06, 2024, 09:39:34 am
content: Looking for the air filter for a Fluke 5790A/5720A/5700A series calibrator, if anyone can help.

author: squadchannel
author_rank: Frequent Contributor
timestamp: November 06, 2024, 10:24:08 am
content: Code:Ref Des Description Part Number QtyMP420 5700A-8021,FILTER, AIR 813493 1If you want to use anything, you could use a sponge, but I think you are probably using a metal filter to act as a shield.

author: TWG
author_rank: Newbie
timestamp: November 06, 2024, 10:25:25 am
content: thanks, but looking for the complete filter.

author: squadchannel
author_rank: Frequent Contributor
timestamp: November 06, 2024, 10:28:16 am
content: Do you know the approximate size?

author: TWG
author_rank: Newbie
timestamp: November 06, 2024, 10:35:02 am
content: approx 10cm x 15cm

author: squadchannel
author_rank: Frequent Contributor
timestamp: November 06, 2024, 10:52:40 am
content: hmmm, it is small.I think it is a thick metal filter.tried looking for it, but can't find.if can't get it, have to make you own.

author: TWG
author_rank: Newbie
timestamp: November 06, 2024, 10:58:08 am
content: thanks, yes I think that might be the way to go.
Rechargable Battery Tester   Li-Ion, LifePo4 etc - Page 1
Forum section: electronics / testgear

author: dbvanhorn
author_rank: Newbie
timestamp: November 05, 2024, 01:18:12 am
content: I'm looking for an instrument that isn't too spendy, and will automatically graph multiple charge and discharge cycles on a battery pack.I need to be able to set the current to tens of mA through amps on discharge. Ideally a programmable current over time so I can emulate real world loads.I need it to run without PC connection, though setting up for the test is fine with PC or phone (android) software.I've seen a lot of options, but they are either half the solution, or very pricey.

author: thm_w
author_rank: Super Contributor
timestamp: November 05, 2024, 09:17:50 pm
content: Quote from: dbvanhorn on November 05, 2024, 01:18:12 amYeah thats how it is. If you "need" the graph you can either use a PC and log the numbers yourself, or buy a high end instrument that does it for you. If you don't need the graph then there are plenty of cheap options, though they will just do single charge/discharge.What you are asking for is a niche product.See existing threads:https://www.eevblog.com/forum/testgear/battery-simulators-ngm202-vs-bcs6401/https://www.eevblog.com/forum/testgear/recommendations-on-battery-simulatorsmu/https://www.eevblog.com/forum/testgear/keysight-e36731a-battery-emulator-alternative/
Rigol MSO5000: Observation / Issue with statistics module - Page 1
Forum section: electronics / testgear

author: passenger54321
author_rank: Newbie
timestamp: November 05, 2024, 10:25:58 am
content: Hi,When trying to script for the statistics mode of my MSO5074, I ran into the following observation.User issue or bug?The goal is reading the noise level (Vrms) statistics for the different vertical ranges.For completeness, I am using the following SCPI command which is not listed in the programming manual.Not sure though if it is hidden for a reasonSetting the moving average window (in display: Measure -> Statistics -> Counter):MEASure:STATISTIC:COUNTrange probably [10..100000]This one exists once for all up to 10 ITEMsSo, I am setting :MEASure:STATISTIC:COUNT to 10.The issue I am observing is that the reset does not completely reset for larger time base settings e.g. 1 sec / div.So after a:MEASURE:STATISTIC:RESETI am waiting until:Measure:Statistic:Item? Cnt, VRMSreaches the value of above COUNT, so I know the window is full.(and yes, the Cnt comes back as a scientific E-notation float, but should be int. And this is not my main issue)While waiting, I can see on the display that the first [1..5] values in the statistics box are still from the previousmeasurement (from before the reset). The # is somewhat random; mostly 1So, when next calling:Measure:Statistic:Item? AVerages, VRMSthe average is wrong.Is this behaviour known and understood? Any workaround available?Thanks for taking the time to look into the topic.-Ulrich

author: thm_w
author_rank: Super Contributor
timestamp: November 05, 2024, 09:12:28 pm
content: The bug thread is here:https://www.eevblog.com/forum/testgear/review-rigol-mso5000-tests-bugs-questions/Though I don't see anything related to what you are talking about.Have you tried calling Measure:Clear?Presumably the workaround would be to read Vrms every trigger, run that ten times, and average the result?
[DONE] Need User/Service manual for Fluke 382A Calibrator - Page 1
Forum section: electronics / testgear

author: enut11
author_rank: Super Contributor
timestamp: May 27, 2020, 04:58:12 am
content: Bought a dead Fluke 382A calibrator so while it is on the way I would like to study up on the manual.I note that @timb repaired one a while back but he has not answered my PM.Anyone else on the Forum willing to share a PDF copy of the Fluke 382A manual?Thanksenut11

author: wn1fju
author_rank: Frequent Contributor
timestamp: May 27, 2020, 10:04:17 pm
content: https://www.bobsmanuals.com/Electronics/Industrial/Fluke/382A/manual/

author: DG5NGK
author_rank: Newbie
timestamp: November 05, 2024, 08:00:21 pm
content: Thanks for the link, unfortunately nothing happens after solving the recaptcher. Maybe someone can share it another way?Solved!If someone else need it, I found it here:https://docs.alltest.net/manual/Alltest-Fluke-382A-UserManual-22217-.pdf
DsLogic Plus - Trigger position is not as it should - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: November 05, 2024, 04:38:51 pm
content: Hi,i got the DSLogic Plus, and i cant get the trigger to behave.I got a trigger condition that occures every 800ms. But when i set the capture duration to 1s, the trigger is not always at 50%. I have tried a few times with different "Repetitive Capture" values, but i dont even comprehend what that is useful for. If i set up a trigger, i dont have to set up a interval? If i set this above 0.8s then triggers get missed anyway.Anyone has an idea what i can do?https://www.dreamsourcelab.com/doc/DSView_User_Guide.pdf
Solartron Schlumberger SI 7705 - Page 1
Forum section: electronics / testgear

author: burnhamcontrol
author_rank: Newbie
timestamp: November 05, 2024, 03:23:37 pm
content: Anybody got a manual for the SI 7705 data transmission analyser. I need to do some work on a G703 interface and was wondering if this instrument would be of any use to me. Any help would be appreciated. Cant find one on lineThanksRichard
ID the gigantic oscillograph in this 1943 Navy training video - Page 1
Forum section: electronics / testgear

author: RedPlateAl
author_rank: Newbie
timestamp: November 03, 2024, 06:30:20 pm
content: Greetings from HollandI recently came across this WWII era US Navy training video on YouTube. I'm sure all vintage gear lovers are guilty of watching these in private from time to time. But if you watch this one though, at 17:21 mark you will be confronted with this:Massive, isn't it? From what my vintage MKI eyes can see, the front panel says Cathode Ray Oscillograph. I couldn't find anything about it on the interweb. I'm hoping one you fine gentlemen can solve the mystery. The fact that I cannot find anything about it on the web only exacerbates my fear that this very chunky old boy might be long gone, scrapped for parts, buried in a landfill or even worse forever lost to time all together. I imagine not many were made and given their size probably not many if any were adopted as mil surp, like a good old St Bernard in a shelterI hope someone will assure me that a friend of a friend has one, or there is one in a museum somewhere, or perhaps someone in the forum has run into one in the wild (not literally I hope).Here is a link to the full video

author: KK7DTE
author_rank: Newbie
timestamp: November 04, 2024, 02:23:24 pm
content: This has a Supreme Instruments aesthetic. Not sure though...

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: November 05, 2024, 02:03:01 pm
content: Look around 9:50 mark, it seems the guy holds metal clips with 800V in his hands!

author: lokin4areason
author_rank: Contributor
timestamp: November 05, 2024, 02:15:29 pm
content: http://www.r-type.org/vox/vox-014.htmthe valve museumhttp://www.r-type.org/index.htm

author: RedPlateAl
author_rank: Newbie
timestamp: November 05, 2024, 02:16:28 pm
content: Doesn't even flinch, they don't call them the greatest generation for nothing.

author: pcprogrammer
author_rank: Super Contributor
timestamp: November 05, 2024, 03:20:41 pm
content: Quote from: maxwell3e10 on November 05, 2024, 02:03:01 pmAnd at that point you realize that the sound is not in sync with the video. The crack of the spark is heard before you see the actual spark.
New Rigol DHO/MHO5000 SERIES Oscilloscope - Page 1
Forum section: electronics / testgear

author: hussamaldean
author_rank: Unknown
timestamp: November 05, 2024, 06:01:12 am
content: Hi all,I opened rigol website today to check if there is an update to my oscilloscope and I see they introduced new oscilloscope:DHO/MHO5000:HIGH RESOLUTION. HIGH PERFORMANCE. MORE CHANNELS. LOWER PRICE.DHO/MHO5000 Series High-Resolution Oscilloscopes• 4, 6, or 8 Analog Channelshttps://www.rigolna.com/products/digital-oscilloscopes/dho-mho5000/4Gsps with 500MHz/1GHz bandwidth.Starting price for 4 channels, 16-channel digital channel and two channel function generator is 4700$8 channels without logic and function generator part is 15700$.

author: skander36
author_rank: Frequent Contributor
timestamp: November 05, 2024, 02:32:10 pm
content: There is already a thread opened on this:https://www.eevblog.com/forum/testgear/new-rigol-dho5000-oscilloscope-12bit-1ghz/msg5619531/#msg5619531
Kenwood CG-922 PAL TV pattern generator (maybe also Leader LCG-409 or LCG-403C) - Page 1
Forum section: electronics / testgear

author: 1980s_john
author_rank: Contributor
timestamp: July 13, 2023, 09:19:30 pm
content: Hi,I bought a Kenwood CG-922 PAL TV pattern generator, this is a very neat unit that runs off four 1.5V batteries or a 6V DC supply, and outputs to composite video or UHF TV outputs. Issue it has is on the UHF output the test tone sound (1kHz) is not at the right offset from the video carrier frequency (for PAL-I this should be 6MHz, I think the unit offsets more than this based on manual tuning my TV).I've found the Kenwood CG-921 / 922 user manual, but can't find a service manual. Closest I found was this supplier shows it as out of stock:https://www.pacparts.com/part.cfm?part_no=B51%2D1109%2D00&mfg=JVC%2FKenwoodGoogling around I think the Leader LCG-409 (NTSC) or LCG-403C (PAL) may be the same device.Does anyone have a service manual or can point towards which adjustment sets the offset please?Thanks,John

author: santosp
author_rank: Contributor
timestamp: November 04, 2024, 08:19:03 pm
content: https://www.cieri.net/Documenti/Kenwood/Test%20Instruments%20-%20Service%20and%20Instruction%20Manuals/Kenwood%20CG-922%20-%20PAL%20Color%20Pattern%20Generator%20-%20Service%20Manual.pdf
Siglent SDS2204x Plus bandwidth hack - Page 1
Forum section: electronics / testgear

author: blavo1
author_rank: Newbie
timestamp: November 07, 2024, 11:04:08 pm
content: I've been reading some of the previous posts to this forum for hacking SDS2000x+ upgrades. The posts I'm seeing are 2-4yrs old, but I still tried some of the procedures in the new posts. Some of the posts I've seen show a modification to the PCA on the scope by adding a capacitor. Some of the newer posts show a python script where you enter the scope ID and model number. After running the script you can telnet into the scope using port 5024 and you'll enter the SCPI command prompt. I haven't taken scope apart and python script/telnet option didn't work.Is there a more current method for upgrading a scope now? If there's a more current post, I'm missing it.Any help is greatly appreciated.

author: Martin72
author_rank: Super Contributor
timestamp: November 07, 2024, 11:18:03 pm
content: Hi,First question that comes to mind: why open a new thread when you've obviously found the hack thread and would ask the question there?Secondly, the SDS2000Xplus can still be hacked using script-generated keys.If it doesn't work for you, you've done something wrong.

author: tautech
author_rank: Super Contributor
timestamp: November 07, 2024, 11:27:49 pm
content: Quote from: blavo1 on November 07, 2024, 11:04:08 pmWelcome to the forum.Disregard any comments about caps, you've mixed up model #'s or those that wrote about such dunno what they're taking about.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: November 08, 2024, 02:28:07 am
content: you just need the Python script, follow its instructions, and enter the option serial numbers as required...

author: blavo1
author_rank: Newbie
timestamp: November 08, 2024, 12:13:45 pm
content: Thank you for the quick response Martin72, I really appreciate your help with this. The news you provided is encouraging.The problem I had was with my telnet session into the scope. I set up my "Teraterm" terminal emulator to connect and it was successful, I actually got the SCIP prompt but the scope would not accept any input. My scope is new and I'm sure it has the latest firmware on it. Is it possible that the SCIP is locked out now?Now knowing that the script still works and I'll give it another try.

author: blavo1
author_rank: Newbie
timestamp: November 08, 2024, 12:17:38 pm
content: Thanks for the response Tautech, I've been seeing posts about that as well and I appreciate the clarification.

author: KungFuJosh
author_rank: Super Contributor
timestamp: November 08, 2024, 12:25:46 pm
content: Quote from: blavo1 on November 08, 2024, 12:13:45 pmYou don't need to telnet in. Connect via the scope's webserver and get the needed device info. Then run the scripts, then input the codes in the webserver.

author: blavo1
author_rank: Newbie
timestamp: November 08, 2024, 12:56:42 pm
content: Guys than you all for your help and having a better understanding of the procedure, I have it up and running.
Korad PSU: how to tell if it's the "bad" version when buying used - Page 1
Forum section: electronics / testgear

author: chconnor
author_rank: Contributor
timestamp: November 04, 2024, 07:39:18 pm
content: Hi -- I'm in the market for a very budget PSU and was considering a used Korad. I've seen Dave's video (youtube ?v=Fya-4mjV4N4), and I know that they fixed the issue (youtube ?v=_HrvuHSywms) he found in his video many years ago.When shopping for a used PSU, is there any way to tell if it is manufactured after this fix was deployed? E.g. via serial number or other tells?E.g. the one in Dave's video has no input AC selection switch (120/240) and later models do, but I don't know if that's reliable.The serial numbers I see out there are all over the place, but I'd assume "higher = better".Any other indications? Thanks!
R&S CMW500 list of hardware options - Page 1
Forum section: electronics / testgear

author: dr3hl3rt
author_rank: Newbie
timestamp: November 04, 2024, 08:25:04 am
content: Hey,I have a CMW500 which I want to use for bluetooth measurements. It came with two "SUW" boards (1201.4908.03), and in order to use bluetooth I need a SUU board.my issue is that I can't seem to find a list of the hardware options numbers, so I have a hard time tracking one down on eBay.I think it translates to "H200A" in the UI, but that is definitely not the same as a B200A board (yes, now I have three SUW boards...)any help would be greatly appreciated!
Does the Tektronix 3034B Not have AC trigger coupling? - Page 1
Forum section: electronics / testgear

author: LoveToRepair
author_rank: Newbie
timestamp: November 03, 2024, 09:32:26 pm
content: I recently acquired this scope. But when I tried to change the trigger coupling to AC. The only options i see are DC, HF reject, LF Reject, and Noise reject (DC low sensitivity. I would have thought that I would have been able to change it to AC trigger coupling. with it being a Tektronix. or is there something wrong with the scope?

author: 44kgk1lkf6u
author_rank: Regular Contributor
timestamp: November 04, 2024, 03:00:52 am
content: The TDS3000 series does not have the feature even though older models have it. Other features that disappeared in this series include the high resolution acquisition mode, segmented memory which they call fast frame, and the trigger frequency counter.

author: 44kgk1lkf6u
author_rank: Regular Contributor
timestamp: November 04, 2024, 03:04:31 am
content: Oh. And equivalent time sampling.

author: TimFox
author_rank: Super Contributor
timestamp: November 04, 2024, 03:51:01 am
content: Will "LF Reject" mode work for your AC-coupling needs?

author: David Hess
author_rank: Super Contributor
timestamp: November 04, 2024, 05:56:16 am
content: It is not unusual for low frequency reject to serve in place of AC coupling.
121GW software that works? - Page 1
Forum section: electronics / testgear

author: gamerpaddy
author_rank: Regular Contributor
timestamp: November 03, 2024, 08:39:48 am
content: Im looking for software for the 121gw on android and windows that works on my side.i cant install the android app.. legacy and UEI are gone and meteor is last updated 2020. it says its not available for my device.i cant install the windows app either since its from the store, the store isnt working and i have no intent to make it work.i tried downloading the appxbundle to manually install it without the store, but it says its missing mrt100_app and sharedlibrary dll's even tho i have installed all frameworks and vcredis there is.why isnt it just a exe you download and execute? no installer, just hit enter and connect. no gigabytes of libraries needed. its just BLE