hybridfree/eevblog-posts huggingface dataset:
Tek DPO7000  series - licence , have anyone tried to hack that scope ? - Page 1
Forum section: electronics / testgear

author: Wade2019
author_rank: Contributor
timestamp: June 04, 2020, 03:18:21 am
content: Forgive me this stupid question, but I really want to know

author: wp_wp
author_rank: Regular Contributor
timestamp: September 26, 2020, 02:23:49 pm
content: 我在某网上看到有人破解了不是在EEVBlog而是在中国的某网站

author: Jwalling
author_rank: Unknown
timestamp: September 27, 2020, 07:56:24 am
content: Quote from: wp_wp on September 26, 2020, 02:23:49 pmWhat he said!

author: coromonadalix
author_rank: Super Contributor
timestamp: September 27, 2020, 03:46:37 pm
content: I saw someone in a cracked onlineNot EEVBlogBut a site in Chinawould be nice to know this link or info source ?

author: coromonadalix
author_rank: Super Contributor
timestamp: September 27, 2020, 03:49:11 pm
content: Found this for lower models ??https://debugmo.de/2013/03/whats-inside-tektronix-dpo5034/other infoshttps://www.techdirt.com/articles/20140806/07155928127/tektronix-uses-dmca-notice-to-try-to-stop-oscilliscope-hacking.shtmlhttps://hackaday.com/2014/07/28/cloning-tektronix-application-modules/Original hack a day before being modified and attached in this thread, good luckhttps://kupdf.net/download/cloning-tektronix-application-modules-pdf_59f2fc57e2b6f5d63c456bc0_pdf

author: Wade2019
author_rank: Contributor
timestamp: January 11, 2021, 05:45:41 am
content: Hi coromonadalixTek DPO7000 DPO5000 DSA70000C MDO series have been cracked in China, but the crack is not willing to share the way

author: veegee
author_rank: Newbie
timestamp: April 19, 2023, 07:50:39 am
content: Can you share where you found this?

author: calibrationfixture
author_rank: Regular Contributor
timestamp: April 21, 2023, 05:48:01 am
content: Hi,@ « Reply #5,6:Be a bit more specific; Options or BW? Options Keys for DPO7000, DPO/DSA70000: allready "common knowledge". BW: Acquisition Board specific. Sometimes can be done. No experience with these.Calibrationfixture
121GW louder beep - Page 1
Forum section: electronics / testgear

author: fichamba
author_rank: Contributor
timestamp: April 18, 2023, 11:20:13 pm
content: Hello everybody,I've just received today my new EEVblog 121GW DMM, and it is a nice creature!I have only one question: is it possible, in any way, to raise the beep volume?. I know this is not implemented in the software, but I really need to do it. I have a bunch of DMMs in the lab, both bank and portable, and when I'm looking through the microscope I always need to use a Fluke (say, the 87 IV), because these are the only ones with a decent beeper. Even my Rigols have a ridiculous beep sound... I love this little beast, so IMHO its a bit louder than others, but not enough, almost for me (specially whith the rest of the equipment turned on...fan noise is terrible, specially in Tek scopes -colour, tube, I mean).TIA for your help, and I send you my best wishes from Madrid, Spain.

author: thm_w
author_rank: Super Contributor
timestamp: April 19, 2023, 10:31:21 pm
content: You can see the schematic here:https://github.com/tpwrules/121gw-re/blob/master/pdfs/121GW%20EEVBlog%20Circuit%20diagram.pdfBuzzer is listed as ALP05S.Reducing or removing the series resistor might make it louder.

author: fichamba
author_rank: Contributor
timestamp: April 19, 2023, 10:47:12 pm
content: Great!. Thanks a lot for the schematics. You make my day!

author: rodcastler
author_rank: Regular Contributor
timestamp: April 20, 2023, 11:28:42 am
content: Funny: I publihed a tutorial on how to lower the volume on the 87V bc I felt it was too loud to my liking.

author: fichamba
author_rank: Contributor
timestamp: April 20, 2023, 10:12:55 pm
content: Quote from: rodcastler on April 20, 2023, 11:28:42 am...it never rains to everyone's liking!
XY mode not working on Agilent 54622D - Page 1
Forum section: electronics / testgear

author: Victor11035
author_rank: Newbie
timestamp: April 19, 2023, 11:07:45 pm
content: Recently I just bought an Agilent 54622D scope, but after playing around with it I noticed that when setting it to XY mode nothing happens. No dot, no line, absolutely nothing. I did notice though that if I do a single trigger in the main mode with both channels active, then switch to XY mode, it will display what it should. But if I then press Run/Stop, it will clear the screen and continue to display nothing at all. I've tried changing the voltage divisions, and going into the menus, but I can't seem to find anything useful. After looking into some service manuals, I noticed that there was something about the external trigger controlling whether the display is visible, but there is nothing connected to the external trigger and there doesn't seem to be anything visibly wrong with it. I have also tried the self-test, which it has passed. The only thing is that I am unable to perform a User Cal due to "Digital Thresholds", but I have no idea what that means nor if these issues are connected in any way. Any help would be appreciated, thanks in advance!

author: alm
author_rank: Super Contributor
timestamp: April 20, 2023, 07:35:53 am
content: I don't have this scope, but some general suggestions. Is the scope set to normal or auto trigger mode? Is the scope triggering without XY mode enabled? Is it displaying two signals then?

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: April 20, 2023, 12:01:29 pm
content: Before you try XY make sure that you have traces on the two channels you are comparing and make sure that you have one or twofvull waves shown

author: Victor11035
author_rank: Newbie
timestamp: April 20, 2023, 03:49:20 pm
content: Quote from: alm on April 20, 2023, 07:35:53 amIt seems to be triggering fine and displaying both channels for the other modes (Main, Delayed, Roll). The trigger options also seem to be locked out during XY mode, as anything related to triggering just displays a message saying "The selection is not available in this mode".Quote from: Wallace Gasiewicz on April 20, 2023, 12:01:29 pmBoth traces are showing up fine and working well in the other modes, which is why I'm confused why XY mode isn't working.
Rohde & Schwarz FSH Series - Any techs that work or have worked on these? - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: April 20, 2023, 12:56:40 am
content: I have a couple of R&S FSH series analyzers that have issues with the signal level display. At first I thought that the attenuator IC was defective but it turns out not to be the case. If I input a known signal level (say 10MHz at -30dBm) and manually move the reference level so that the RF attenuator steps thru 0,10,20,30 dB the indicated level at 0dB will be 5dBm high, at 10dB about 0.85dB low, at 20dB about 8dB low and at 30dB about 12dB low. Furthermore this level discrepancy does not change with frequency. Now if I set the RF source to match the reference level and then reduce the RF source in 10dB steps the display tracks perfectly. It does the same for 2dB steps as well. So it looks like the log amp (or the software that emulates one) is working correctlty.The sensitivity appears nominal. So it looks to me to be a calibration issue, or something really strange going on with the stepping of the RF attenuator IC which has been replaced and its tracking appears to be the same as the old one. When I replaced the IC I did not see anything unusual on the PCB. It looks clean with no evidence of overloading, etc.Has anyone been able to figure out how to calibrate one of these? Perhaps its just a look up table somewhere but I don't know. If I were to send it to R&S they charge more than it's worth just to cal it and if they can't cal it they still charge a small fortune.I really would like to get this one working as it has a tracking generator and I have the reflection bridge that goes with it.Thank you for any help you can render.SamW3OHMP.S. I have heard that there is software out there to do a level cal but I have been looking for quite some time and have never found it.
Hantek laboratory power supply HDP4324B Ethernet problem - Page 1
Forum section: electronics / testgear

author: kacperpk
author_rank: Newbie
timestamp: December 29, 2022, 01:27:00 pm
content: Hi, Not long ago I bought a HDP4324B laboratory power supply, but it has a problem with Ethernet. Immediately after connecting the network cable or after turning on the power with the lan cable connected, the laboratory power supply hangs completely and only a restart helps.I suspect it's a software bug related to network packet size, I've already written to the manufacturer but at the moment he's not responding.Maybe one of you has a newer version of the firmware than my H-008-01-02.02.02

author: unicornio
author_rank: Contributor
timestamp: April 18, 2023, 11:44:21 pm
content: I have ordered an hdp4424 for quite some time and they have not sent it to me, maybe they are having problems to solve, and the product is still not available?... please, I am very interested in hearing about your experience, and I am looking forward to seeing a video or photographs of the inside of the instrument...thank you!...:-)
New (to us) Rigol DS4054 - Page 1
Forum section: electronics / testgear

author: tom66
author_rank: Super Contributor
timestamp: April 17, 2023, 12:48:29 pm
content: We have just acquired a Rigol DS4054 from a bankrupt stock auction.The instrument seems to work okay and came with all options installed, bargain!However the UART decoder doesn't seem to work well, and there are a few other minor bugs... I was thinking I would upgrade the firmware but then read that this can in some unfortunate cases brick the scope. Due to its age, it would obviously not be under warranty any more and therefore I don't think I'd be very popular at the office if I did this and killed it.The scope is currently SW 00.02.00 and hardware 1.2 and we would be looking at installing 00.03.02.02.00.Is it worth doing? Will the scope be bricked? If it does go bad can it be recovered or will it be only something Rigol can fix?Thanks

author: Fungus
author_rank: Super Contributor
timestamp: April 17, 2023, 01:43:29 pm
content: Quote from: tom66 on April 17, 2023, 12:48:29 pmYes.Quote from: tom66 on April 17, 2023, 12:48:29 pmVeryunlikely.Quote from: tom66 on April 17, 2023, 12:48:29 pmProbably.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 17, 2023, 11:43:18 pm
content: Or to be sure ask Rigol or check the website to be sure ...

author: Fungus
author_rank: Super Contributor
timestamp: April 18, 2023, 02:21:47 am
content: FWIW, here's the release notes. If you have 00.02.00.00 installed then you get all of these:[Supported Model] All the MSO/DS4000 Series Digital Oscilloscopes[Latest Revision Date] 2018/07/04[Updated Contents]--------------------v00.03.02.02.00 2018/07/04- Cancel the speed adjustment of vertical offset-------------v00.02.03.01.01 2017/08/15- Fixed Screen confusion- Speed the adjustment of vertical offset- Extend the size of label to 10 characters- Fixed the storage problems

author: tom66
author_rank: Super Contributor
timestamp: April 18, 2023, 09:53:58 pm
content: Hmm, the upgrades seem pretty minimal to be honest. The only issue I've found so far is that the UART decoder isn't great (but then again the Rigol serial decoders have never been great on my DS1000Z, so perhaps I shouldn't be that surprised.)
Pace st325 profiling pc software - Page 1
Forum section: electronics / testgear

author: amexlive
author_rank: Contributor
timestamp: April 17, 2023, 02:15:21 pm
content: Hello,I have a PACE ST325 and I'm looking for the PC Software for this deivce.Thank you in advance!Kind regards

author: tooki
author_rank: Super Contributor
timestamp: April 17, 2023, 07:08:13 pm
content: https://paceworldwide.com/st325st350-software
TEK DG2020A Schematics - Page 1
Forum section: electronics / testgear

author: Ade911
author_rank: Regular Contributor
timestamp: January 31, 2023, 08:11:13 pm
content: Hi team, I have a dead DG2020A Data Generator , Ive given up with the power supply  and used separate supplies , however I now have clock errors. I don't want to brick the unit its in a good state and boots OK. Has anyone got any circuit diagrams please, I have all the manuals that are online [Also circuit diagrams for pods as it didn't come with any].Many thanks,

author: aeg
author_rank: Regular Contributor
timestamp: February 12, 2023, 08:01:01 am
content: As far as I know, the schematics were never published. I would be delighted to be proven wrong!Here's what's inside the P3420 variable output pod:

author: aeg
author_rank: Regular Contributor
timestamp: February 12, 2023, 08:04:22 am
content: top closeup

author: aeg
author_rank: Regular Contributor
timestamp: February 12, 2023, 08:05:00 am
content: top closeup 2

author: aeg
author_rank: Regular Contributor
timestamp: February 12, 2023, 08:06:17 am
content: bottom

author: Ade911
author_rank: Regular Contributor
timestamp: April 22, 2023, 06:52:02 am
content: Thanks for the images.The system is now working, the main crystal was dead on the A30 clock board and after using external power supplies the 2 volts was pulling more current than i realised so after beefing this up all was well. Just need to purchase a cheap pod or get diagrams or it but thats not really possible so may end up being one of those pieces of test equipment you never use.
HP/Agilent E3615A Power Supply experience - erratic display - Page 1
Forum section: electronics / testgear

author: n6rob
author_rank: Newbie
timestamp: April 15, 2023, 11:58:11 pm
content: I am posting my experience so others may benefit from what I learned about repairing this power supply.I found this post in my research and found it helpful:https://www.eevblog.com/forum/testgear/hpagilent-e3615a/. In the last message of the topic the author notes that the "OVP/CC Set" button (S7, a & b on the schematic) on the face becomes erratic and makes the unit "weird" (a very technical term...).I recently bought one of these units listed on eBay as "for parts/not working". Indeed, the unit was acting "weird" when I powered it on.The power supply was delivering rated voltages and current to the terminal posts as measured with a separate DMM. Adjustments worked and the output was steady, over-time. However, the display was erratic - wandering all over the place. I also notice when I pushed the OVP/CC button rapidly the display would wander even more... hmmm... I cleaned the switch with contact clearer, worked it a couple dozen times, and the display works as intended. I would have preferred to disassemble the switch to clean it more thoroughly, but I wasn't sure I could get it apart without a risk of destroying it.On another note, the plastic in these old units gets really brittle. Holy cow! I ended up with a pile of small broken plastic bits, mostly from the display "shell" that goes on the front of the unit. I'll probably have to hot glue the display PCB into the housing as all the plastic retainers are gone. Ugh.But as others have said, these supplies are second-to-none in quality and performance. Love 'em.Good luck with yours!

author: zrq
author_rank: Frequent Contributor
timestamp: April 16, 2023, 01:47:27 pm
content: The front panel switch is a common problem with many different HPAK E36xx power supplies. Almost all of them in my day job lab have gone half bad.
BM257s multimeter -- disable automatic shutdown? - Page 1
Forum section: electronics / testgear

author: ebastler
author_rank: Super Contributor
timestamp: April 19, 2023, 12:38:16 pm
content: The automatic power-down of the Brymen BM257s has fooled me several times today, during an extended circuit re-engineering exercise:In continuity test (beep) mode, the BM257s silently powers off after 15 minutes or so. Apparently this is not an "inactivity timeout", but just a simple timer: The fact that I keep making and breaking connections does not not extend the time. Since I don't look at the meter while tracing connections, I frantically kept probing for connections, wondering why that stupid pin seemed unconnected to anything...I there a way to disable the automatic shutdown, or at least make the meter beep as it shuts down to alert me to the change? (Apologies, this feels like a question that has been asked before; but I could not find anything.)

author: Fungus
author_rank: Super Contributor
timestamp: April 19, 2023, 02:18:46 pm
content: Have you read the "Disabling Auto-Power-Off" section of the manual?

author: ebastler
author_rank: Super Contributor
timestamp: April 19, 2023, 03:49:18 pm
content: I had thumbed trough the manual looking for something on the shutdown funtionality, but apparently not carefully enough. Found it now, thanks!
Yokogawa DL1740 battery replacement - Page 1
Forum section: electronics / testgear

author: mpavlica
author_rank: Newbie
timestamp: April 13, 2023, 08:56:34 pm
content: Hi guysI have replaced battery on DL1740 Yokogawa, board is nice and clean, but it still reports error 907 - flat battery. All settings are stored, kept in RAM, but this message is still showing during startup, I guess that there is some service procedure to reset it.Anyone knows how?Thanks!

author: Inside21
author_rank: Contributor
timestamp: April 14, 2023, 08:25:48 pm
content: user manual says about it: quickly replace, or go to service center (page 3-7)https://cdn.tmi.yokogawa.com/IM701730-01E.pdfmay be this oscill have 'load default settings' option?pages 16-6, 16-1....press reset, and power up...

author: mpavlica
author_rank: Newbie
timestamp: April 14, 2023, 09:07:05 pm
content: Yeah, I did a replacement but I didnt know that reset function will fix batt fail test... Thanks for fix!
[thread closed]why TestController software can not find my GPP-4323 power supply - Page 1
Forum section: electronics / testgear

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: April 16, 2023, 02:21:02 pm
content: Hi,My GPP-4323 has no Ethernet option, only USB and RS232, I have connected it with USB to my PC, and I can Detect it with a normal terminal program, like bray terminal, But Test Controller software can not detect and find it, what am I doing wrong?I can detect and send commands to GPP-4323 with a normal termianl programThe load devices tab of Test controller and it's config, (and yes I have disconnected the bray terminal before testing with Test controller software)If I check scan serial ports, It would only find COM3 which is another Serial port on my PC motherboard and it would not find COM4 which is the actual GPP-4323 port

author: coromonadalix
author_rank: Super Contributor
timestamp: April 16, 2023, 02:49:08 pm
content: you should have posted in the software thread instead of starting a new thread ....

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: April 16, 2023, 03:24:20 pm
content: How can I move it there?

author: coromonadalix
author_rank: Super Contributor
timestamp: April 16, 2023, 04:06:02 pm
content: ask some moderatorsyou have a report fuction on the threads ...

author: tautech
author_rank: Super Contributor
timestamp: April 16, 2023, 07:11:50 pm
content: Quote from: ali_asadzadeh on April 16, 2023, 03:24:20 pmYou can't.All things TC are here:https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/What you can do is Copy/Paste your questions to HKJ into that thread and add a 'thread closed message here and maybe add a link to your TC post should others land here with the same question in years to come.You can also change/edit the topic name if you please.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: April 17, 2023, 07:49:36 am
content: I have copy and past the message in this linkhttps://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/msg4817441/#msg4817441And modify the title with [thread closed]
Hantek DSO4204B - Page 1
Forum section: electronics / testgear

author: zakrent
author_rank: Newbie
timestamp: June 26, 2018, 07:01:51 pm
content: So I wanted to buy 200Mhz oscilloscope and I decided on buying 2Ch SDS1202X-E but I've noticed that Hantek has one in the same price range and with 4Ch but I couldn't find any reviews of it. Do you have any opinions about it?

author: VSV_electron
author_rank: Regular Contributor
timestamp: April 13, 2023, 09:33:15 pm
content: Anyone has any updates on the above request?Still no opinions?
Alternative to UltraSpectrum for Rigol DS-815TG - Page 1
Forum section: electronics / testgear

author: kn4ycd
author_rank: Newbie
timestamp: April 13, 2023, 06:56:49 pm
content: Does anyone know of a similar program to Ultraspectrum from Rigol for their SA's? I've got a demo running, but the software is pretty sad lookin for almost $300 US. I don't mind paying for software, but this one reallly don't seem worth the cost!Thanks!Jim
WTF software control for some tti  arbitrary generators - Page 1
Forum section: electronics / testgear

author: coromonadalix
author_rank: Super Contributor
timestamp: March 22, 2023, 12:19:50 pm
content: does some members here knows or have some basic software to control TTI TGF4042 series ...Their waveform manager plus 4.14 software is crappy as hell, you load some pre defined wave and push it to the gen i thinkAnd sadly, I dont know zit about labview stuff or have some base to work with ?i just want a simple interfaceand they did not answered Emails

author: coromonadalix
author_rank: Super Contributor
timestamp: April 13, 2023, 03:56:54 pm
content: forget iiiiiiiiiiiiitt lollnow switched on a SSG3021x with a very basic labview front panel interface
Weird behaviour on new LONGWEI LW-K3010D - Page 1
Forum section: electronics / testgear

author: vresiberba
author_rank: Contributor
timestamp: April 16, 2023, 04:20:10 pm
content: When lowering the voltage down, I can't get below about 6 volt, then it shoots down to 0 and when trying to turn it up again, it immediately jumps up to 7 volt. It reminds me of dodgy pots, what do you think?https://www.youtube.com/shorts/cQ7w3PyreSE

author: Fungus
author_rank: Super Contributor
timestamp: April 16, 2023, 05:38:03 pm
content: I think it's faulty. Send it back.

author: vresiberba
author_rank: Contributor
timestamp: April 16, 2023, 05:44:16 pm
content: Quote from: Fungus on April 16, 2023, 05:38:03 pmThanks, but I'm trying to fix it.
GDM-8251A - Page 1
Forum section: electronics / testgear

author: GigaJoe
author_rank: Frequent Contributor
timestamp: April 12, 2023, 03:51:15 am
content: in overall i like it but it always sitting aside, for some reason, and one of them was constant jabbering of 2 last digits ....so i finally decided to open and look inside .... and here we are ....the power supply actually OTC 5V switching PSU, with minimal filtration,then it feeding onboard switching converter that convert 5V to +16 and -16 ( i think ... )then linear regulatorsand all this going to analog part of DMM.in overall not really possible to change much of design, I simply add ceramic caps as much as i can to 5V PSU, and additional possibly 12-15 low ESR poly. caps as separated, simply glue it to metal case ; it has a lot empty space nearby PSU.an additional caps , a lot like 6-7 on each output of switching converter on board. and additional caps before and after linear regulators.finally i add on top of every tantalum cap an additional poly electrolyte on 100-200 mkfand after that dmm became really quiet , jumping +-1 microvolts, ( quiet on everything) ...guess it may help ....

author: bdunham7
author_rank: Super Contributor
timestamp: April 12, 2023, 09:04:43 pm
content: That's interesting--I had one as well and the noise was one of the 5 main reasons I hated the meter. Its quite surprising that they shipped a meter like that with such an obvious issue. The solution should have been well within their grasp!

author: Kleinstein
author_rank: Super Contributor
timestamp: April 13, 2023, 06:44:13 am
content: Some linear regulators are a bit picky about the ESR of the capacitors at the output. Especially some LDOs don't like to have too low loss capacitors at the output. A combination of a lossy capacitor (e.g. classic electrolytic) and low ESR capacitors can still be OK.Having a noise problem due to insufficient supply filtering / ripple is indeed embarassing.
Bruel & Kjael Vibration Analyzer 2515 - Page 1
Forum section: electronics / testgear

author: C-47
author_rank: Regular Contributor
timestamp: April 12, 2023, 06:40:08 am
content: Thought I would post as it maybe of interest to some, its a B&J vibration analyzer model 2515 and I used it to dynamically balance a surface grinder many years ago after a bearing change, it provides phase angle and displacement for locating balance weights. It is large and weighs a lot even without the battery, but still powers on after a RIFA cap was replaced in the external power supply. Alan
Jud Williams Model A /Sprague/Lectrotech Curve Tracer - Page 1
Forum section: electronics / testgear

author: Dawn
author_rank: Regular Contributor
timestamp: September 10, 2014, 11:48:31 pm
content: Does anyone have a schematic on this unit? I have a copy of the instruction manual that's been floating on the net for years, but there's nothing about the circuitry or a schematic. Sprague and Lectrotech at some point took over the manufacture and distribution from the original garage operation. I've never seen a copy of the later version manuals by Sprague nor the apparent addition of a Super Beta function to the original design.Anyone have a schematic or know the origins of this unit?

author: dgminala
author_rank: Contributor
timestamp: March 05, 2015, 01:22:40 am
content: Did you find any documentation for your Jud Williams curve tracer? If not, I might be able to help. I contacted Jud last year and got some information from him regarding the curve tracer bearing his name (and subsequently, the Sprague brand).You can find a version of the manual (no schematics) onwww.ko4bb.commanual site. I uploaded a copy of the manual there. I have a bit more data (including schematics for a couple different versions) for it, if you're interested.Cheers,Dave M

author: EKATRON
author_rank: Newbie
timestamp: July 09, 2017, 05:42:28 pm
content: dgminala, how could I get hold of schematics for the Jud Williams Sprague Electrotech model A transistor curve tracer?

author: EKATRON
author_rank: Newbie
timestamp: July 09, 2017, 05:45:49 pm
content: Hello, Dawn - Were you ever able to get hold of schematics for the Jud Williams Sprague Electrotech model A transistor curve tracer?

author: xfactor69
author_rank: Newbie
timestamp: April 11, 2023, 08:11:08 pm
content: Do you still have a schematic for the Jud Williams curve tracer. I just got one on ebay and want to dial it in.Thanks,-ml
Need ISDS205b EEPROM - Page 1
Forum section: electronics / testgear

author: White Rabbit
author_rank: Newbie
timestamp: April 11, 2023, 11:26:20 am
content: Hello everybody!I have an Intrustar ISDS205b USB oscilloscope with generator. But it was damage via static electric from bad power supply. It is posible becouse PCB has zero-Ohm resisors on earth wire of USB connector. They are blown.I was replace CY7C68013A, but have no idea where i can get binary image for 24C64.Does anybody have binary dump for 205bmodel?
Does anyone know of an analog multimeter manufactured in Ireland? - Page 1
Forum section: electronics / testgear

author: Thomas Ballantine
author_rank: Contributor
timestamp: April 14, 2023, 07:27:25 pm
content: I am due to commence employment in the Electronic Engineering field later this year, in the Republic of Ireland. I'm aware that there is a significant history of electronics manufacturing there (IBM in Dublin, DEC in Galway, Apple in Cork, Intel and others elsewhere). So, when I was browsing listings for AVO Model 8s on ebay, I got to thinking that surely some enterprise at some point has manufactured a multimeter here. Are there any?

author: wasedadoc
author_rank: Super Contributor
timestamp: April 14, 2023, 09:45:46 pm
content: Those big name companies set up plants in RoI because of incentives by the Irish government which wanted to create large numbers of jobs. I'm far from convinced the market for meters would have required enough employees to get the idea through a first stage assessment.
BSIDE ESR02 ESR/SMD Tester - I can't calibrate - Page 1
Forum section: electronics / testgear

author: Caster
author_rank: Newbie
timestamp: April 08, 2023, 10:27:31 am
content: I bought aBSIDE ESR02Pro(DTU-1701 V3.1FW v1.11k) a few days ago. However, in battery or 12 V mode, I can not calibrate (shorting of 3 terminals) it and can not get into the menu. Later, the display randomly lights up when I measure the capacitor. Before taking a new measurement, I always have to disconnect the instrument from the battery/socket for a while to get a new measurement after pressing the button.Any advise what can be wrong? Where can I download the latest FW preferably from the author i.e. "?.??m".

author: Per Hansson
author_rank: Unknown
timestamp: April 10, 2023, 09:18:27 pm
content: The tester is not protected against voltages above 5v.So if you measured a charged capacitor the Atmega chip will be destroyed...If only the firmware is bad you can flash it via the unpopulated header on the PCB.There is updated firmware available in this large thread linked below.If you want the original firmware I linked a post where I uploaded it.https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg1383969/#msg1383969
Tektronix 5A18N help required - Page 1
Forum section: electronics / testgear

author: Gianni
author_rank: Contributor
timestamp: April 09, 2023, 01:05:44 pm
content: Hi,I am restoring a 5103ND11 with a 5A18N vertical amplifier. Now the device is working. I heard a "stock" and the 200V fuse was blown. After many checks I discovered that the +200 line is overloaded (but no low resistance can be measured on it). In a short: if I cut the +200V trace on the 5A18, the scope is still working, but without the lights on the panel and making the main fuse to blow.It seems simple to fix ...but the 5A18N should not use the 200V, according the schematic. Maybe mine piece of equipment is older than the schematic. Has someone the schematic with the 200V for the lights, please?Thanks

author: Whitefoot
author_rank: Contributor
timestamp: April 09, 2023, 07:26:35 pm
content: This may not apply, but I had a Tek 5223 scope blowing fuses on the 200V supply. See diagram. The 2/10A fuse was blowing. C1220 checked OK and didn't show excessive leakage. C1220 was 250uF 150V. I replaced it with a 150uF, 250V cap and it now works fine.

author: Whitefoot
author_rank: Contributor
timestamp: April 09, 2023, 07:29:45 pm
content: I'm trying to figure out how to attach an image.

author: Gianni
author_rank: Contributor
timestamp: April 10, 2023, 06:00:50 pm
content: I am stupid.1) i sprayed WD40 contact in the DISPLAY switch were there are 200V contacts2) I switched the thing on without waiting that the WD40 dried3) it discharged and burned the 200V fuse and then the main fuse4) I changed the fuse with a 1A fast instead of slow5) I spent a day in very complex thoughts and tests asking myself why the fuses blewWith the correct 1A SLOW fuse, everything is OK.....
Hameg HM8012 ''OFF" - Page 1
Forum section: electronics / testgear

author: giannisv
author_rank: Newbie
timestamp: April 04, 2022, 09:16:21 am
content: Hello all,I have been using HM8012 for several years but suddenly the OFF indicator appeared on the screen. Is there any opinion on this problem?

author: F64098
author_rank: Regular Contributor
timestamp: April 05, 2022, 12:59:08 am
content: There seems to be a problem with the Cal-EEProm 93C46. Reject it and try to switch on.Best regardsFrank

author: giannisv
author_rank: Newbie
timestamp: April 05, 2022, 01:52:18 pm
content: Dear Frank,Fisrt of all thank you for answer but the eeprom 93c46 in a socket it's easy to removed and appeared on display CAL E (calibration error), the problem remains.Best Regards,Giannis

author: F64098
author_rank: Regular Contributor
timestamp: April 05, 2022, 03:01:46 pm
content: You can find the service manual here:https://sm5cbw.se/hameg/hm80/hm8012-serv.pdfThe display of 'OFF' is not mentioned in it and i never saw it on my 3 units.So i have no further idea, what happened to your unit.Best regardsFrank

author: giannisv
author_rank: Newbie
timestamp: April 05, 2022, 03:11:07 pm
content: Dear Frank,You were absolutely right as soon as I replaced the eeprom 93c46 it works and you need calibration.Thank you very muchGiannis

author: holyholy
author_rank: Newbie
timestamp: April 09, 2023, 07:19:30 pm
content: Hello to everybody. Thank you for this forum it has helped me a lot. I have a Hameg HM8012 which has problems. At first, after turning on and starting the procedure, it said OFF. Replacing the EEPROM as shown here solved everything. After powering up with the new EEPROM it showed CAL E and the display showed nonsense values. I tried to load the data from the original EEPROM and it worked. So I uploaded them to the new memory and turned on the device. The display showed CAL E again, but the multimeter went into measurement mode, the ranging relays clicked, but the instrument behaved strangely and measured the wrong readings. I suspect that the data in the old EEPROM is corrupted. Could one of you email me the .bin file from your multimeter? I would try uploading it to mine to verify the function even at the cost of inaccurate measurement.Thank you for any new advice. Richard.

author: kripton2035
author_rank: Super Contributor
timestamp: April 09, 2023, 08:29:56 pm
content: so... it seems a good thing to open your 8012 and save the eeprom content for the time where the eeprom dies ?

author: holyholy
author_rank: Newbie
timestamp: April 09, 2023, 08:33:10 pm
content: It would probably be good. I would need statement 93C46

author: kripton2035
author_rank: Super Contributor
timestamp: April 10, 2023, 06:53:01 am
content: I don't think the eeprom content of another 8012 will be good for your 8012, as the calibration sure is different.

author: holyholy
author_rank: Newbie
timestamp: April 10, 2023, 03:20:06 pm
content: Yes, I know that other calibration values will not be suitable for my 8012, but I will verify that the device is fine (even if it will measure inaccurately) and then I can have it calibrated in an accredited laboratory.
Advantest R3681 Signal Analyzer - CAL Error - Prefilter Wide CF1 - Page 1
Forum section: electronics / testgear

author: chinhcheng
author_rank: Contributor
timestamp: April 06, 2023, 06:15:58 am
content: Hi,Is there anybody in group have Advantest R3681 Signal Analyzer with working normal,My unit have error in CAL system, If anybody have this unit, could you please send me the Window Ghost file, or maybe Cal File.Any advice from the forum would be greatly appreciated to me.Thank you
NATIONAL/PANASONIC FREQUENCY COUNTER VP-4546A - Page 1
Forum section: electronics / testgear

author: samson
author_rank: Contributor
timestamp: April 07, 2023, 05:49:05 am
content: Hi, could any one help me in a operating Manual for the Nation/Panasonic Frequency counter VP4546A.any help would be appreciated.Thanking you in advanced.

author: aeg
author_rank: Regular Contributor
timestamp: April 07, 2023, 09:30:06 pm
content: The model number of that counter appears to be VP-4546A, not VP-4565A.Japanese counters from the 80s all were imitations of the contemporary HP and Fluke models, so if you want to get an idea how to use it, an HP or Fluke manual is close enough.
Multimeter test lead wear - Page 1
Forum section: electronics / testgear

author: robdejonge
author_rank: Regular Contributor
timestamp: April 07, 2023, 05:08:02 am
content: A little over a year ago I bought a Cleqee P1600C kit which I've really liked in terms of its modularity. But over time, the tips have gotten iffy. Apologies for the 'photo-of-a-screen', but I've attached a photo of a 'fresh' tip and one that has been on the meter for a year. Fresh meaning it was sitting in a drawer somewhere, but otherwise unused.My first gut feel was that perhaps the tropical climate here played a part. You'd be surprised how poor a lot of plastics and rubbers hold up to the high humidity. Or perhaps corrosion (I doubt these are gold-plated). But then ... both probes would have been exposed to the same climate. This can't be common, can it?! Is there any way I can clean these?Alternatively ... getting ready to buy a new meter I thought about getting some nice leads. Wondering if Probe Master probes will fare any better, especially given this climate. Please let me know if you have any thoughts.

author: Berni
author_rank: Super Contributor
timestamp: April 07, 2023, 05:19:46 am
content: Gold plating does wear off over time. Especially with the cheep probes where it is really thin.Tho if anything it tends to be the sides of the probe that might corrode enough to make a issue with contact. The tip tends to experience so much abrasion trough getting pressed into things that it cleans any oxidation off it as you use it. This is why the gold plating will tend to wear off on the tip. But good quality gold plating should help a lot with the sides of the probe not oxidizing.Tho you might be having the opposite problem of the things you are probing being oxidized. In those cases it helps having really sharp pointy probes to help puncture the oxidation layer on the the thing being probed. I personally like really sharp probes, but they also make it a lot easier to stab yourself accidentally with one.

author: David Hess
author_rank: Super Contributor
timestamp: April 07, 2023, 03:38:24 pm
content: My favorite multimeter probes are hardened steel. What works well if you have a lathe is to drill out the metal probe body and silver solder a sewing needle in to use as a probe.
Fluke 177 issue.  - Page 1
Forum section: electronics / testgear

author: Brobert
author_rank: Newbie
timestamp: April 07, 2023, 08:52:48 am
content: I was recently adding a display to an LS SV-iG5A inverter, wanting to use the 0-10v analogue output, when testing the output with my fluke 177 meter, it showed nothing, like 0.07v flicker whereas my co workers 115 meter and my own T5-600 tester both showed the output fine. Anyone able to explain this for me, so I have a point to ask for a new meter?
New Rigol DS1102Z-E board version 0.0.1? - Page 1
Forum section: electronics / testgear

author: wdonders
author_rank: Newbie
timestamp: January 14, 2023, 09:18:21 am
content: Picked up my new Rigol DS1102Z-E scope yesterday.This model must be around for at least 5 years, and I was wondering if there is any way to see the manufacturing date of the unit?When opening system info, It shows "board version 0.0.1" which sounds like a pre-release beta beta?The software version is "00.06.03.SP1" which seems recent, but this might be updated by the seller. (I bought it from a well known local shop which specializes in electronic lab equipment)Rigol.eu states that the latest version is "v00.06.03.02.02", how does that relate to my SP1 version?Sad to see that there is no firmware changelog..

author: Fungus
author_rank: Super Contributor
timestamp: January 14, 2023, 08:14:51 pm
content: You'd have to take it apart and look at the PCB.The 2-channel model isn't very old.Why does it matter?

author: wdonders
author_rank: Newbie
timestamp: January 15, 2023, 09:35:52 am
content: @Fungus:Thanks for the reply, in the mean time I found out by reading more in the eevblog forum that board version 0.0.1 is indeed still a recent (or even only) version.Also the Firmware version is one of the latest.So, no worries now>Why does it matter?Nobody wants to receive a first buggy version of a device when you buy it new, but I can't find anything about this first version being buggy

author: Fungus
author_rank: Super Contributor
timestamp: January 15, 2023, 11:24:44 am
content: Quote from: wdonders on January 15, 2023, 09:35:52 amThis was released many years after the DS1054Z and uses mostly the same hardware/firmware.

author: trmntr
author_rank: Contributor
timestamp: April 07, 2023, 07:37:05 pm
content: Hello. Board version 0.0.1 is not the only one, there is still version 0.0.13Photo from aliexpress
Fixed placement of a handheld multimeter - Page 1
Forum section: electronics / testgear

author: robdejonge
author_rank: Regular Contributor
timestamp: April 07, 2023, 02:06:27 am
content: The metal strips anchored into the wall for the adjustable shelving over my bench turned out to be a great spot for the magnet on the back of my current multimeter. I like how it sticks up there, out of the way and always accessible. Itlooks likeI'll again be getting a handheld multimeter to upgrade the main meter spot, probablya Brymen. It too has an optional magnetic holder, but it made me wonder...For those of you who have a handheld meter in a 'permanent' spot on your bench, how do you have it propped up? Just leaning back on the stand or something akin to thefantastic mounting system GigaJoe uses? I foundsomething clever on ThingiverseI thought looked alright.Shared mine below. Would love to see some photos or suggestions if you have a handheld meter in a semi-permanent spot!

author: BeBuLamar
author_rank: Super Contributor
timestamp: April 07, 2023, 03:29:24 am
content: I don't know as I don't even have permanent space for my bench meters.
HANMATEK DOS1102 firmware - Page 1
Forum section: electronics / testgear

author: fmasta88
author_rank: Newbie
timestamp: April 06, 2023, 12:33:26 pm
content: Thanks in advance to anyone who will answer me! I bought this HANMATEK DOS1102 DSO on Amazon in 2020, but I didn't use it much. I only recently realized (I hadn't really noticed, mea culpa!) that the measures are indicated incorrectly, A (Ampere?) instead of V (Volts) and furthermore channel 2 reads everything 10 times higher, apart from the frequency: does anyone know how to fix it? I have not found anywhere a firmware update, or the possibility of solving the problem (perhaps with the USB port), technical assistance does not even seem to exist...Thanks

author: tunk
author_rank: Super Contributor
timestamp: April 06, 2023, 01:10:01 pm
content: Ten times higher could be a setup problem, e.g. using a 10x probe with a 100x scope setting.Amps could also be a setup problem.

author: fmasta88
author_rank: Newbie
timestamp: April 06, 2023, 01:13:42 pm
content: A thousand thanks! I checked the probes and they are ok, but I don't know if there is any configuration that I haven't done. Can the incorrect A>V indication be corrected by computer software?
DDS AD9910 Arduino Shield RF Signal Generator - Page 1
Forum section: electronics / testgear

author: MaxGaspa
author_rank: Newbie
timestamp: April 06, 2023, 08:25:46 pm
content: Recently I've got an RF generator based on AD9910 with Arduino. The linnk to the manufacture ishttps://gra-afch.com/catalog/rf-units/dds-ad9910-arduino-shield/It has a 40 Mhz TXCO and is working at 1GHz sampling.Observing the spectrum of a 200 MHz signal (-30 dBm nominal power) with my Ultra SA I observed a "strange" spectrum near the carrier (SA with 4 Mhz span , RBW 30 Khz)Hereatfer the link to the spectrum imagehttps://drive.google.com/file/d/130d0kFAi0Ng9DkvypV0Np_d61f4_brEa/view?usp=sharingthere are several sidelobe, -25dBc, aroun the main carrier.My guessing is that the generator is not working properly. It seems there is jitter in the carrier (no modulation is activated).I'd like to get some opinion on the spectrum. Should I accept this kind of spectrum from this generator? It it normal?Far from the carrier the phase noise seems OK but near the carrier the signal doesn't seems "pure enough" for the the AD9910I sent several e-mail to the owner of the site / designer of the board but no reply from them.Any opinion, idea, advice,suggestion?ThxMax

author: Bud
author_rank: Super Contributor
timestamp: April 06, 2023, 09:09:21 pm
content: I think it is not the oscillator but the PLL multiplier inside the chip not locking properly. There should be a few external components that form a PLL loop, selection of these component values is critical. It could be that the design was incorrect (copied from another product, etc). Yes this manifestates as jitter.

author: erikka
author_rank: Regular Contributor
timestamp: April 07, 2023, 07:55:16 am
content: The side lobes appear on my device if the supply voltage is too low or not stable.The supply of the whole setup is extremely critical. It works best with a 7.5V external supply.
Vintage Tektronix oscilloscope Type RM15 - Page 1
Forum section: electronics / testgear

author: Summerford
author_rank: Newbie
timestamp: April 01, 2023, 06:59:44 pm
content: Hi everyone(my first post here ;-)I wanted to share this - as this same model was mentioned on this a forum in a post a while ago...A couple of weeks I came into possession of this scope - in fact I rescued it from imminent disposal.When i opened it I was surprised to find the inside perfectly clean with no dust and in pristine state, with all the original components, no sign of replacement.I gradually powered up the kit with the variac. It powered up but there was nothing on the display.Luckily the scope came with the original manual and all the schematics. I shorted the vertical and horizontal deflection signals and the dot was there; eventually I found the problem in the trace intensity pot, which was open. After a generous dose of contact spray, the trace came up on the cathode ray display.The next problem was the distortion of the trace, both vertical and horizontal. With no input signal, the distortion showed a 100Hz periodicity, hinting at ripple on the rectifiers. In fact, 3 out of the 5 big electrolytic caps (125uF) were exhausted. I disconnected them and installed 3 new new ones, discretely placed, leaving the originals in place.And that was it. It works like new - all the controls are ok. A 60 years old (at least) instrument - I found it listed in 1959 Tektronix catalogue!I am amazed by the quality of the kit. The components are numbered according to the circuit they are in - identified by the first digit. All the the passive components are racked into ceramic strips, all is easily accessible and straightforward to trace. The manual is excellent.Amazing kit!Here are some photosCheers to all.

author: ccktek
author_rank: Regular Contributor
timestamp: April 02, 2023, 03:44:58 pm
content: Congrats on your find. A gorgeous instrument.

author: TimFox
author_rank: Super Contributor
timestamp: April 02, 2023, 04:32:39 pm
content: One advantage of the "UHF" SO-239 coaxial connectors used on Tektronix CROs of that vintage is that they accept normal banana plugs, as well as PL-259 coaxial plugs and the ubiquitous UHF/BNC adapters.

author: HMPMMP
author_rank: Newbie
timestamp: April 04, 2023, 01:13:58 am
content: Absolutely beautiful device.I rescued a 515A from a garage floor not long ago. It was very dirty but complete. After some serious clean-up, generally and electrically, I brought it up slowly and all functions work. It too has a hint of ripple (running it at higher frequencies), and I suspect the caps. For the hard life it had, I'm not complaining. It looks really good now and performs much better than I ever expected. I even managed to find some original P6000 probes. Very interesting - you adjust the capacitance / tune by turning the barrel of the probe.Enjoy the RM15 and congratulations on your find.

author: tkamiya
author_rank: Super Contributor
timestamp: April 06, 2023, 05:36:57 am
content: I had one of those many years ago. Believe it or not, I was able to tune 144MHz radio with it. It's nowhere near accurate of course, but it was able to display it.