hybridfree/eevblog-posts huggingface dataset:
BNC Adapter Probe to BNC Quick Plug for RIGOL PVP2150 Probe - Page 1
Forum section: electronics / testgear

author: 2X
author_rank: Frequent Contributor
timestamp: July 08, 2021, 10:17:25 pm
content: Hello,I want a BNC Adapter Probe to BNC Quick Plug that will fit properly in RIGOL PVP2150 Probe. I measured the diameter of the probe with a caliper and it is about 4,3mm. Do you know (anyone have ever try this) if the below ( -1- ) which has 5mm diameter will fit ok? Any suggestions are welcomed.RF Adapters - In Series BNC Adapter, 5mm (non-terminated) -1-https://gr.mouser.com/ProductDetail/Cal-Test/CT2708?qs=%2Fha2pyFaduil9aKKzx25pi5mjlqy6xB4Xhlq2jKVKQM%3DOscilloscope Probe for HF Tektronix,Agilent BNC Adapter Probe BNC Quick Plug DT -2-https://www.ebay.com/itm/184736275973?hash=item2b0323de05:g:p9UAAOSwNBNgY-5aI want to connect this at the below adapter:BNC FEMALE T O DOUBLE BAN PLUG -3-https://gr.mouser.com/ProductDetail/Pomona-Electronics/1269?qs=2nDnb8a6ouOGU0H3lmGx4Q%3D%3D

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: November 02, 2024, 08:44:59 pm
content: Anyone ever found a ca. 4.5mm BNC adapter for the Rigol probes?
ISO-TECH scope touchscreen probs  - Page 1
Forum section: electronics / testgear

author: Liteace
author_rank: Regular Contributor
timestamp: November 02, 2024, 03:34:26 pm
content: Ive got here a ISO-TECH IDS-307 scope, the touchscrrn works but I can not get into the menu, it used to work, drag it down from the top and there was the other menu but now it doesn'tAny tips ?Thankshttps://youtu.be/qDGx6nOGLjo?si=jwY1F5SRKUYKCOE0
R&S RTM3004 wrong ARINC decoding - Page 1
Forum section: electronics / testgear

author: fsedano
author_rank: Contributor
timestamp: October 31, 2024, 07:39:33 pm
content: Hello folks,Sharing here a very weird problem with my RTM3004 scope. I've spent also time with the R&S support folks, but we're running circles, so any help is welcome.My RTM3004 always display all ARINC packets as error decoding. Other protocols work well, but ARINC shows unexisting timing issues.I've recorded a video to show the following steps:- Reset to factory the scope- Setup channel, trigger levels and decoding parametersSame signal is perfectly decoded in both a Agilent MSO-X-3024 and on a Picoscope 3000. I've tried with signals generated from my equipment but also from real avionics HW, so I'm confident they are correct.The signal is 12.5Kb. It becomes even more interesting because when I opened the case with R&S they asked me to send them the raw capture data from scope + the settings file. I did so and they mentioned the settings were to 'manual speed, 50Kb'. That's not true, I double checked and the settings are low-speed, 12.5k.So, the R&S support engineer shared with me a settings file that for sure is set to low-speed, 12.5Kb and when I loaded into my scope... It shows as 'Manual, 50Kb'It seems for some reason my particular scope has both settings somehow crossed (?). So I'm completely confused here.Please find the video herehttps://youtu.be/KGV8VqUmXcU?si=fUQ5fgIR63aREmvDThis video shows me loading the R&S provided file, which was supposed to be set to 12.5Kb ...https://youtu.be/JTU7SxLTz7w?si=uopg4LGq7JBTwidQThanks!

author: Rich@RohdeScopesUSA
author_rank: Frequent Contributor
timestamp: October 31, 2024, 08:34:28 pm
content: Got your PM - definitely odd behavior. I'll PM you and we'll see if we can figure this out and then post up the answer.-Rich

author: fsedano
author_rank: Contributor
timestamp: November 01, 2024, 11:55:38 pm
content: Quote from: Rich@RohdeScopesUSA on October 31, 2024, 08:34:28 pmThanks for your help Rich! Will keep also the thread posted.
Tektronix TDS3012 with CORP MOD 89907 Label on Back - Page 1
Forum section: electronics / testgear

author: whipaway
author_rank: Contributor
timestamp: October 31, 2024, 09:31:23 am
content: I found this label on one of my TDS3012 'scopes. A Google search doesn't help, maybe someone here knows what it means? Modification, module, model?

author: ebastler
author_rank: Super Contributor
timestamp: October 31, 2024, 01:43:27 pm
content: I think it's "Corporate Modification". See e.g. page 8 of this PDF:https://w140.com/tekwiki/images/1/16/ServiceTekNotes_51_Jun_1988.pdfApparently there was a "Corporate Service Support & Planning" group which developed, documented and published such modifications. I assume the sticker means that a specific modification has been implemented on your unit (by field service?).

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2024, 07:11:34 pm
content: yep could be a specific demand for an option, spec etc ... maybe if tek can answer ??or opening the scope and try to do some photo compare ??check the fw version too

author: colorburst
author_rank: Regular Contributor
timestamp: November 01, 2024, 05:39:56 pm
content: Whatever it is, it must be pretty generic. This label also shows up on TDS5000/6000/7000/8000 series scopes. Given how little there is in common between these instruments, I'd speculate it's a broad modification for safety or EMC compliance, but I don't know for sure. It would be interesting to see inside photos for comparison.

author: coromonadalix
author_rank: Super Contributor
timestamp: November 01, 2024, 06:33:45 pm
content: eh if it works fine
Service menu access BK 4007B Function Generator - Page 1
Forum section: electronics / testgear

author: jjd
author_rank: Contributor
timestamp: October 31, 2024, 05:48:01 am
content: I have two of these devices and I was able to get one into what I believe is a service menu, but can't do the same in the other.The menu available shows details on the model, version,etc the 4 menu options are:CALIB, show, versio, coffeeThe one picture I have shows two lines:Freq: 600kHzCALVAL1 = 3762Checking online I can't locate a service manual nor details on how to enable a service/calibration mode.Does anyone know how to enable that menu?I also though I tried "coffee" and it may have shown a picture of a coffee mug and something like a 15 minute timer (warm up?)TIA

author: Kean
author_rank: Unknown
timestamp: October 31, 2024, 11:25:47 pm
content: Sorry I can't help, but I do think that more test equipment need a coffee option in the menus. I might have to add that to a future project.

author: jjd
author_rank: Contributor
timestamp: November 01, 2024, 08:58:02 pm
content: If I didn't have this picture I may have not remembered it's possible...now I just need to remember how that was achieved, wondering if the 600kHz was important, I've got no clue.
HP 8566B frequency peak at zero - Page 1
Forum section: electronics / testgear

author: pinball!
author_rank: Newbie
timestamp: October 28, 2024, 03:38:30 am
content: I've had this HP 8566B that I use for alignments for various pieces of RF equipment and test gear. I got to thinking today about a weird peak I see at my low end while I was looking at the output of a colorbar generator. For whatever reason, I get a fairly strong signal at 0Hz. (Pictured is the questioned center peak, followed by the actual signal) While I'm not trying to measure anything that low, it interferes with the peak selection. The 0hz peak is there whether anything is connected to the input or not. Is this just some weird artifact, or a potential issue? If an issue, where should I begin looking?

author: ftg
author_rank: Frequent Contributor
timestamp: October 28, 2024, 09:19:23 am
content: The 0Hz or DC spike is a well known artefact in spectrum analyzers.So it is nothing to worry about, but just something to be aware of.

author: pinball!
author_rank: Newbie
timestamp: October 31, 2024, 10:26:24 pm
content: I was under the assumption that the DC component was generally a few dB at most. I've used other Spectrum Analyzers that show a small bump, maybe 3-5db above the noise floor.

author: ftg
author_rank: Frequent Contributor
timestamp: November 01, 2024, 11:00:02 am
content: Usually when I have seen the DC spike on spectrum analyzers, it has been tens of dB above the noisefloor.Here's some fresh images from a one year old Siglent SSA3032X.In these screengrabs theYellowtrace is the realtime one andPurpletrace is max hold.Here's how it looks looks when the analyzer is set for 9kHz to 100kHz span.The DC spike is approx 43dB higher than even 14kHz.On the 9kHz to 1MHz span we see that the spike is still shown 24dB above the noisefloor.And even with 9kHz - 100MHz span we still see the DC spike at the start.The only spectrum analyzers where I have not seen this has been those that don't start at low frequencies.For example my R&S CMU200 or CRTU-RU don't have it, as their spectrum analyzer covers the 10MHz - 2700MHz span.And while some microwave folks might call 10MHz "DC", it's still reasonably far away from 0Hz.
Downloading data from cheap test gear ('scopes etc.) - Page 1
Forum section: electronics / testgear

author: MarkMLl
author_rank: Frequent Contributor
timestamp: October 19, 2024, 01:17:54 pm
content: I'm in the middle of tinkering with some software I wrote a couple of years ago which collects the memory from a very cheap DSO-112A 'scope, with a view to sticking it on Github. In principle it can load drivers for other devices.Can anybody suggest additional *cheap* 'scope-type devices that could be used for testing? I'd rather not go up to Rigol etc. prices since I already have an adequate (albeit elderly) bench scope.Dave, if you read this: I've just been watching your review of the FNIRSI DSO-TC2 and might I suggest that as routine it would be worth plugging that sort of thing into a (Linux) computer and noting whether it reports having any form of data interface in addition to using USB to charge its battery.If something reports having e.g. an FTDI (knockoff) chip then there's a reasonable chance that even if it doesn't have a download protocol that the firmware could be reverse engineered to add something.MarkMLl

author: Bryn
author_rank: Regular Contributor
timestamp: October 19, 2024, 04:01:13 pm
content: Depending onhowcheap you want to aim for, consider the following...FNIRSI 1014D (£60-£80)Hantek 6022BE (£50-£70)DSO Nano v3 (£40-£60)Take your pick :)

author: MarkMLl
author_rank: Frequent Contributor
timestamp: October 31, 2024, 05:25:01 pm
content: Quote from: Bryn on October 19, 2024, 04:01:13 pmSo just to touch base:FNIRSI 1014D: looks like a scope, 3x BNC, red and blue buttons at TR of panel.Hantek 6022BE: box with no display or physical controls.DSO Nano v3: is thathttps://www.aliexpress.com/item/1005006745365222.html?MarkMLl
UNI-T UT71C started beeping continously when on - Page 1
Forum section: electronics / testgear

author: spikey1973
author_rank: Regular Contributor
timestamp: October 30, 2024, 05:15:24 pm
content: Hey to all here.My trusty UT71C has suddenly became less trusty.Although on first glance it still measures fine, it started beeping when turned on.The battery is full, there is no error msg on the screen and seems to work fine besides that.Does anyone here have any clue where to start when i am willing to repair this?I contacted UNI-T and they suggested to send it back to ali-express (after owning it for 8 years now)for now I will disable the contacts to the disk in the back (sorry i seems to have blanked on the proper naming, but it will come back) so it can't beep.but I would love to be able to use it in a normal manner.Kind greats
Rigol DHO924S Logic Analyzer Trace zoom Issues - Page 1
Forum section: electronics / testgear

author: tuvix
author_rank: Newbie
timestamp: October 30, 2024, 04:46:58 am
content: This is a question and somewhat of a rant. I have Rigol DHO924S. As a scope it works well so I decided to fork over another $400 for the PLA2216 logic probe but it's been a huge disappointment. The issue is the traces are so small i can barely see then and they are drawn behind text. I changed the settings to LARGE font but it makes no difference and the trace can't be moved, zoomed, or rescaled. I contacted Rigol, they respond quickly but the only suggestion was to switch the signals around so D0 wasn't on the bottom but that hardly makes a difference when I can barely see the thing. What really burns me is they acted like there's nothing wrong with it and had no plans to fix it.Is there a way to rescale it? Any have a good experience with the logic probe on this scope or other models?

author: RogerG
author_rank: Regular Contributor
timestamp: October 30, 2024, 09:09:55 am
content: Hi,you can try to switch the axis labels off.I'm not sure, but for normal measurements you can move the traces by drag and drop on touch interface.

author: NE666
author_rank: Frequent Contributor
timestamp: October 30, 2024, 05:08:41 pm
content: It's not clear to me from your screenshot how many channels you are actually trying to use concurrently. Is it just channel D0?If so, then turning off the other active but unused channels (D1 thru D7) will possibly allow you to increase the size of the D0 trace. At least, that would be the case on the MSO5104 which I own.If not, then you're probably stuck with what you have. The 5104 at least, doesn't allow you to position individual traces at will. The most you can do is resize them (screen real estate permitting vs active channels), or to reorder them.
Tester that connects AC load at peak voltage - Page 1
Forum section: electronics / testgear

author: slugrustle
author_rank: Frequent Contributor
timestamp: October 29, 2024, 09:54:03 pm
content: I'm looking for a piece of off the shelf test equipment that connects an AC load to an AC source at the peak of the AC source's voltage waveform. Ideally it would work with a 240VAC 50Hz input.The goal is to stress test the AC source.I'm not looking for something that turns on at the peak every half cycle and then turns off at the zero crossing. Rather, I'm looking for something that turns on at the peak and stays on.It's a little hard to search for this... is anyone aware of an off the shelf tester that works like this?Thanks in advance.

author: David Hess
author_rank: Super Contributor
timestamp: October 29, 2024, 11:44:36 pm
content: I did a quick search for an AC load which can do that, but did not find anything. Hopefully someone else knows.If I needed such a thing, I would design and fabricate the control circuit over an afternoon.

author: slugrustle
author_rank: Frequent Contributor
timestamp: October 30, 2024, 12:09:12 am
content: QuoteI have built one of these before, for 120V 60Hz, with a TRIAC. In that case, the load and heatsinking requirements weren't very high.For various reasons, in this instance, am looking for something a little more professional than I could cook up quickly, and time is important. Hence putting "off the shelf" in the original post twice.

author: TimFox
author_rank: Super Contributor
timestamp: October 30, 2024, 12:44:22 am
content: You will have a problem sensing the time of the peak voltage, since the first derivative goes to zero at the extreme.If you have a clean sine wave, you could phase shift it by 90 deg and sense the zero crossing of the resulting cosine wave.

author: slugrustle
author_rank: Frequent Contributor
timestamp: October 30, 2024, 12:50:53 am
content: The source has consistent phase, so the concept would be to detect the zero crossing and delay by 90°.

author: David Hess
author_rank: Super Contributor
timestamp: October 30, 2024, 02:11:45 am
content: Quote from: TimFox on October 30, 2024, 12:44:22 amThat can work, and I have done it, but derivative circuits are almost always a bad idea.QuoteIn a more comprehensive design, that is what I would do. Phase lock a clean local oscillator to the noisy AC power signal to remove the noise, and then use a phase comparator to phase lock a second local oscillator in quadrature. Or a quadrature oscillator could be used to do it all in one shot.But that is a long way from a simple design which will do what slugrustle requires.

author: TimFox
author_rank: Super Contributor
timestamp: October 30, 2024, 02:16:56 am
content: My comment about the derivative at the extremum is not a suggested method, but an indication of the difficulty of seeing the maximum when it happens.Your suggestion of cleaning up the sine wave with a PLL is practical, since many PLL designs inherently lock to the input with a 90 deg phase shift.
Metrix ox5042 handscope - Page 1
Forum section: electronics / testgear

author: vlelectroniclab
author_rank: Contributor
timestamp: October 29, 2024, 01:01:00 pm
content: Hi, I have a friend who has to sell a metrix ox5042 oscilloscope, what do you think?It has 40mhz with 200 euros I think it's not too much.Has anyone tried it?Attach user manualGreetings

author: coromonadalix
author_rank: Super Contributor
timestamp: October 29, 2024, 01:41:05 pm
content: does it have self tests, do you have some signal generator to check inputs ?

author: vlelectroniclab
author_rank: Contributor
timestamp: October 29, 2024, 03:05:12 pm
content: HI, I think it has a test point to calibrate the probe. Yes I can try it to see how it works. but for 200 euros is it worth it or should I get something Chinese?

author: Aldo22
author_rank: Super Contributor
timestamp: October 29, 2024, 03:13:35 pm
content: Quote from: vlelectroniclab on October 29, 2024, 01:01:00 pmThis is not a hobbyist device.It is certainly quite safe and ISO and whatnot, but the basic specifications are not good by today's standards.It depends on what YOU need.If you need isolated channels, logging etc then it may not be expensive.If you need a more accurate DMM than DC ± (1 % + 20 D) and an oscilloscope with more than 50MS/s, it's too expensive imo.
Wavetek Fluke 9100 unusual problem - Page 1
Forum section: electronics / testgear

author: volvo_nut_v70
author_rank: Regular Contributor
timestamp: June 15, 2023, 09:11:49 pm
content: I have a Wavetek 9100 options 100 and 250 (Scope) that has a very different issue.On boot up it does it's self test, tells me there are two faults and the 9100 freezes. No response to any buttons, no indication that it is a hard or fatal error (other than freezing)By holding down the middle soft button under the LCD on power on to bypass the self checks, the 9100 powers up normally. I can get into all the menus and I can not find anything amiss.I can execute a FAST and a FULL self test and there are no errors reported. I can not find anything that resembles a boot log to snoop into.Has anyone run into this? Any ideas?Thanks!!

author: Ugur
author_rank: Regular Contributor
timestamp: June 16, 2023, 06:01:48 am
content: Hello,Does it give an error code on first boot?9100 devices are very old and you can see many different errors. The reason for these may even be a dried capacitor.Do you get the same error when you turn the device off and on again after being heated for a while by bypassing it?

author: pubs
author_rank: Newbie
timestamp: October 29, 2024, 01:00:03 pm
content: RTC (Dallas 1287) is died
Tektronix P7300 and P7500 Series Wire Replacements Kits - Page 1
Forum section: electronics / testgear

author: calibrationfixture
author_rank: Regular Contributor
timestamp: October 29, 2024, 08:16:33 am
content: Hi to All,Can I use the 020-2644-XX (P7300 Series) Wire Replacement Kit instead of the 020-2754-XX Kit (P7500 Series)? The wire (diameters) in both Kits are the same. The Solder in the 020-2754-XX Kit is Lead Free contrary to the earlier 020-2644-XX Kit. Do I compromise performance or? Thank you in advance for any insights.Calibrationfixture
HP8563E-Can attenuators be operated remotely using GPIB? - Page 1
Forum section: electronics / testgear

author: djsb
author_rank: Super Contributor
timestamp: October 16, 2024, 07:08:16 pm
content: Is it possible to change the attenuator settings remotely using GPIB somehow? I would like to test if the attenuator on my HP8563E are working properly and would like to rule out any keypad involvement. Is there some kind of script or code that I can run. How would I do this, if it's even possible? Thanks.

author: Kean
author_rank: Unknown
timestamp: October 16, 2024, 07:44:42 pm
content: I don't have one, but a quick look at the programming section of the Users Guide lists an "AT" command for setting input attenuation from 0 to 70dB in decade steps.See page 424 of 08560-90158 PDF available from Keysight or BAMA, etchttps://www.keysight.com/au/en/assets/9018-01028/user-manuals/9018-01028.pdfhttps://bama.edebris.com/download/hp/8560/8560-E-EC-Series-SA-Users-and-Programmers-Guide-08560-90158.pdfThe doc shows example code for old HP BASIC, but you'll need a more modern GPIB control software that isn't SCPI specific. Maybe the KE5FX GPIB tool.

author: djsb
author_rank: Super Contributor
timestamp: October 17, 2024, 09:59:01 am
content: What would be the recommended hardware and software interface be for a Windows 10 PC with only USB available? I just ant to start out with identifying the instrument (serial number,model number, options etc) before trying more advanced commands. Thanks.

author: Kean
author_rank: Unknown
timestamp: October 17, 2024, 11:52:42 am
content: I think a Prologix GPIB-USB or GPIB-ETHERNET. It will depend on the software you are using.Have a look athttp://www.ke5fx.com/gpib/readme.htmI haven't played with the KE5FX software. I mostly my own code for SCPI over RS232 or LAN, or sometimes the AR488 USB to GPIB adapters.The AR488 might be a cheaper option, but might require a steeper learning curve. There are quite a few posts on here about Prologix and AR488.

author: djsb
author_rank: Super Contributor
timestamp: October 28, 2024, 04:01:37 pm
content: I think I'll be building one of these adaptershttps://github.com/dazz100/UsbGpibI've read all the way through this topic.https://www.eevblog.com/forum/testgear/open-source-gpib-adapter/The hardware should be straight forward. It will be the first time I've programmed an Atmel chip, and soldering 0603 components and the MCU will be a challenge. Hopefully, PyVisa (if that's what it's called) should be easy to use once I've learnt how to install and run it from a command prompt.
Is my Siglent 1032 Defective??? - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: October 27, 2024, 09:52:39 pm
content: I wasted today trying to align an FM radio. But my sweeps made no sense.Finally, I decided to check the output of the Siglent against my TinySA.Below are pics of the setup and the screenshots of when I trigger off the Siglent and then the TinySA. I also took pics of the TinySA setting and the Siglent setting.The Setup shows before I set both to 20ms sweep time.The trace of the TIny SA breathes as expected. The trace produced by the Siglent is hash with no evidence of "breathing".Before I call Siglent, I would like to ensuure It is not me being me. Output 1 and Output 2 produce the same result. While I was trying to use 10.7MHz, you can see these sweeps are set for 100KHz.I corrected the setup picture.THANKS!!

author: tautech
author_rank: Super Contributor
timestamp: October 27, 2024, 10:08:01 pm
content: Use a Burst setting also for the sweep.

author: watchmaker
author_rank: Unknown
timestamp: October 27, 2024, 11:07:40 pm
content: Quote from: tautech on October 27, 2024, 10:08:01 pmThanks Tautech. I will do this in the AM; after I clean up the barf. I was elbow deep in leads and stuff by the time I wrote my plea. Called it a night.Regards,Dewey

author: watchmaker
author_rank: Unknown
timestamp: October 28, 2024, 01:42:38 am
content: I think I understand why you wanted me to test Burst Mode. The trace of N cycles jumps right to left. The trace is clear at 10KHz and 10MHz, but it will not lock. I can tell myself this is very similar to what I see in the Sweep function.Regards,Dewey (Could not let it rest)

author: tautech
author_rank: Super Contributor
timestamp: October 28, 2024, 06:53:04 am
content: I believe you have some settings incorrect......I look at your screenshots and everything is AC coupled, why ?I haven't got a SDG1032X to test so used my SDG6022X that has the same functionality albeit to much higher frequencies.Sweep 10-100 kHz over a set duration.

author: watchmaker
author_rank: Unknown
timestamp: October 28, 2024, 12:24:29 pm
content: Quote from: tautech on October 28, 2024, 06:53:04 amBecause I am being me??? Thank you! Cleaned up my work area so I can see what I am doing and set trigger to DC. Sweep now takes a deep breath.Warmest,Dewey
Jackson 715 tube tester help - Page 1
Forum section: electronics / testgear

author: daveone23
author_rank: Newbie
timestamp: October 28, 2024, 11:30:07 am
content: Need help with a 715 tube tester(identical to 115). The needle wont center. Meter is tested and good, caps are not shorted, has voltage 6c4 has 6.3 on filament.What should I check and what caused the meter to center?

author: daveone23
author_rank: Newbie
timestamp: October 28, 2024, 11:31:44 am
content: schematic:https://bama.edebris.com/manuals/jackson/115/
Kaemeasu KM-DM03A review  - Page 1
Forum section: electronics / testgear

author: Liteace
author_rank: Regular Contributor
timestamp: October 26, 2024, 10:56:43 pm
content: Does anyone have any info / review or teardown info on this:...............?https://www.alibaba.com/product-detail/03A--High--precision--Anti--burn--multitester_1600715597351.htmlThanks

author: Aldo22
author_rank: Super Contributor
timestamp: October 27, 2024, 08:33:28 am
content: It is probably marketed under different brands.This one looks the same, but has NCV instead of Temp.https://lygte-info.dk/review/DMMHandskit%20117C%20UK.html

author: coromonadalix
author_rank: Super Contributor
timestamp: October 27, 2024, 10:42:43 am
content: Anti burn

author: Liteace
author_rank: Regular Contributor
timestamp: October 27, 2024, 09:21:51 pm
content: Quote from: coromonadalix on October 27, 2024, 10:42:43 amThats not all,, its also got:"Anti shock and anti drop soft rubber protector made of wear resistant silicon, Feel comfortable and durable"
Tek VM6000 - Page 1
Forum section: electronics / testgear

author: langlv
author_rank: Contributor
timestamp: March 08, 2021, 11:53:46 am
content: Hi all,I'm lucky to buy a Tek VM6000 (1GHz). Just peel off the 1st sticker and it's now a DPO7254. May be with some firmware metamorphosis, it will change to DPO7354.Lang

author: d37duck
author_rank: Contributor
timestamp: April 02, 2021, 04:40:01 pm
content: Hi,Congratulations on your luck. I looked for a service manual for your scope and can't fine one, so I have a question. Have you looked inside to see your VM6000 to see if it is made from DPO7000 parts?The Tektronix Service manual for DPO7000 (part number 077-0076-03) is available from their website and identified parts. The PC mother board should be an Intel D945 or Advantech AIMB-562. The Interface PCB is Part Number 671-5912-02 (the -02 part might very). The Acquisition PCB for DPO7104 and DPO7054 is 672-6166-54, for DPO7254 it's 672-5819-54, and for DPO7354 it's 672-6172-50.What is inside a VM6000?Thanks,

author: langlv
author_rank: Contributor
timestamp: April 13, 2021, 09:26:44 am
content: Hi d37duck,I opened the VM6000 few months ago to upgrade the CPU. It is based on a Intel D945 mobo which accepts up to Pentium dual core, not Core 2 Duo. I did not remember the part number of others boards. Normally a VM6000 is based on the DPO7104, but this one is truly a DPO7254 with 40 GS/s on single channel. The front sticker is VM6000-1GS/s, and the rear sticker is DPO7254. There is no probe with it, but an adaptor for testing video items.I am confident that the DPO7354 is "simply" a DPO7254 with hidden license key (or model_ID). According to the manual, even the DPO7354 supports only 2.5GHz analog bandwidth, and use DSP tweaking for achieve the 3.5GHz limit.best.

author: sprit
author_rank: Regular Contributor
timestamp: October 27, 2024, 05:34:40 pm
content: Hi langlv, hope you have a nice dayI just bid on a VM6000 kit from Ebay, Unfortunately the seller removed the hard drives from both. The TDS7254B I currently have is still able to use the firmware from the official website. But this model is not, I can not find any any info about it. can i ask can you share its program file? Thank you very much.Sincerely, Jing Feng
Python class for ET54xx electronic loads: testers wanted - Page 1
Forum section: electronics / testgear

author: thephil
author_rank: Regular Contributor
timestamp: September 18, 2024, 07:06:50 pm
content: Hi everyone,I have written a Python class for remote controlling my ET5410a+ electronic load:https://github.com/philpagel/ET54.py.It's still quite fresh, probably buggy and not 100% documented, yet, but I think it's time to ask for a little feedback. So if you have an electronic load from the ET54 series (ET5410, ET5411, ET5420, ET5410A+, ET5411A+, ET5420A+, ET5406A+, ET5407A+) and you would like to try the Python package, I would very much appreciate some test-reports.I have a bunch of automated tests – even just running those and letting me know if anything failed would help a lot.Thanks in advance.PhilEDIT: update the url for the repo after renaming

author: thephil
author_rank: Regular Contributor
timestamp: October 27, 2024, 10:56:15 am
content: Just a final bump hoping someone reads this and is interested.Sorry for the interruption.

author: EE4all
author_rank: Regular Contributor
timestamp: October 27, 2024, 02:29:11 pm
content: I can think of some uses for this, as I have a few of those load testers. Right now I have two analyzers in pieces, along with a good sized project backlog, so it will probably be a while before I come back to a project where I might use this.
Fluke 319 clam meter calibration - DCV offset - Page 1
Forum section: electronics / testgear

author: LazyJack
author_rank: Frequent Contributor
timestamp: October 27, 2024, 02:07:08 pm
content: I have a Fluke 319 clamp meter (same as the 317 but with hiugher range, and I believe it is manufactured mostly for far eastern markets), which works just fine, but it has one Volt offset in DCV. Everything else is spot on. I'm guessing this is a calibration issue (no, you cannot zero in DCV mode with the Zero key).I was looking for the calibration manual/procedure of this meter, but somehow I'm unable to find it. I don't want to just blindly press the calibration button, as most of the Fluke handheld meters I've seen won't work after that without doing a full cal. This is not a showstopper, I don't use this clamp meter for precise DC Volt measurement anyway and I can always add one Volt to the displayed value if I ever needed. Still, it would not bug my test equipmenet OCD if it was more accurate.So, can anyone point me to the process, or know if is it possible to do DCV cal only?Thanks.
Siglent SSA 3021x - asking for SD/NAND recovery images - Page 1
Forum section: electronics / testgear

author: Gian2975
author_rank: Contributor
timestamp: October 26, 2024, 10:21:14 pm
content: Hi guys,I hope that I'm in the right thread for my one.We were trying to upgrade our device that was currently running the firmware v1.2.9.2a, when it suddently bricked.The device is trying to boot but the Siglent logo is showing up without the unit to fully boot like usual.Moreover the SSA isn't reachable using Telnet anymore (timeout): we guess it isn't able to bring up the network stack anymore.We tryed to dismount the chassis to reach the SD reader but without a valid SD card image we're stuck.Could you please share with us the SD recover card image for the SSA3021x or maybe the NAND flash dump to try recovering my unit without having to send it back to Siglent?ThanksRegards

author: tautech
author_rank: Super Contributor
timestamp: October 27, 2024, 12:16:49 am
content: Quote from: Gian2975 on October 26, 2024, 10:21:14 pmFrom my notes:Pressing the System button at Boot can sometimes recover.USB recovery is also possible to FW 1.3.9.6Siglent EU HQ in Germany can supply you with the USB recovery tool.info-eu@siglent.com
Siglent SSA3021X (not plus) compared to the SVA1032X - Page 1
Forum section: electronics / testgear

author: R-1125F
author_rank: Regular Contributor
timestamp: October 25, 2024, 12:52:56 pm
content: I am considering buying a used Siglent spectrum analyzer for hobby use. How does the SSA3021X (not plus) upgraded to 3.2GHz, compare to the SVA1032X? The going prices for the SVA1032X are considerably higher than the SSA3021X. Are there any significant hardware or other differences that I should consider?

author: tautech
author_rank: Super Contributor
timestamp: October 25, 2024, 02:54:14 pm
content: Quote from: R-1125F on October 25, 2024, 12:52:56 pmOlder earlier HW.Analyzer performance is essentially the same but SSA3kX models are missing:Touch and mouse capability.WebserverSuperior EMI mode.SSA3kX models, while sharing the same case as the later SSA3kX Plus and SVA1000X models cannot beupgradedto either.Entry level into the later capability are SSA3015X/SSA3021X Plus models.....each with their own frequency limitations.

author: R-1125F
author_rank: Regular Contributor
timestamp: October 25, 2024, 10:43:31 pm
content: Thank you. Now I have to decide if the SVA1032X is worth 2x the price.

author: tv84
author_rank: Super Contributor
timestamp: October 26, 2024, 06:59:01 am
content: Quote from: R-1125F on October 25, 2024, 10:43:31 pmYou may not need to buy a SVA. Just buy a SSA3021X Plus and upgrade to SVA1032. (as long as you are lucky with the connectors inside... see the hacking thread)
I received a cool HP time capsule today!  - Page 1
Forum section: electronics / testgear

author: W4PJB
author_rank: Regular Contributor
timestamp: October 25, 2024, 04:09:21 pm
content: It's not every day you come across something like this! Recently the microwave mixer failed on my HP 5350B, so I started looking for a replacement and came across a deal on a NEW 5347A with two brand new power sensors, for $1,300! I originally found it on eBay, but the seller also has a website listing them for a few bucks cheaper. If anyone is in the market for a microwave frequency counter and / or a power meter they still have 4 units in stock. I'm happy to share a link if anyone is interested.Now, for what everyone wants to see... the rare unboxing of a brand new HP device, complete with a calibration certificate from 2/5/1995!!!
New pocket scope, Fnirsi DSO-510, 1ch, claimed 10MHz/48MSps (October 2024) - Page 1
Forum section: electronics / testgear

author: tunk
author_rank: Super Contributor
timestamp: October 25, 2024, 02:45:30 pm
content: - 10Mhz, 48MSps- 10mV-10V/div- 50ns-20s- signal generator 50kHz- 2.8" 320x240 screen- size 99x68x20mm- 1000mAh battery- price from around US$28 on aliexpresshttps://www.fnirsi.com/products/dso-510

author: Aldo22
author_rank: Super Contributor
timestamp: October 25, 2024, 02:57:31 pm
content: Far too expensive compared to a Zeeweii DSO1C81.https://www.aliexpress.com/item/1005007394192248.html
Huge FTP site for JDSU and Acterna - Page 1
Forum section: electronics / testgear

author: Bicurico
author_rank: Super Contributor
timestamp: March 16, 2018, 06:38:48 pm
content: Hi,In order to also "give back" to the forum, here is a huge FTP repository I found some time ago, with lots of software and firmware for Wandel&Golterman, JDSU and Acterna devices:Two different addresses:ftp://ftp.germany.acterna.com/ftp://157.234.254.204/Enjoy!Regards,Vitor

author: Sinager
author_rank: Newbie
timestamp: March 23, 2018, 02:54:13 pm
content: Thank you!I was really trying to find firmware I can reflash on my GenComm in case it bricks.Best regardsStefano

author: aseok
author_rank: Contributor
timestamp: September 30, 2019, 06:40:01 am
content: Hi.I need compensation data and firmware of W&G sna-20/23 spectrum analyzers.

author: shakalnokturn
author_rank: Super Contributor
timestamp: October 02, 2019, 04:56:20 pm
content: Thanks.ftp://157.234.254.204/is not reponding right now, too much EEVblog trafic?

author: Bicurico
author_rank: Super Contributor
timestamp: October 02, 2019, 05:22:01 pm
content: Just use the other link - the contents are the same. They might have a different IP by now.

author: aseok
author_rank: Contributor
timestamp: November 29, 2019, 09:28:54 am
content: Hi.I need installation firmware of SNA-20 and SNA-23 from wandel and goltermann corp.The link provided for the ftp needs username and password.

author: Bicurico
author_rank: Super Contributor
timestamp: November 29, 2019, 10:43:02 am
content: The backup I made of the FTP site does not contain any files relevant to the SNA-20 or SNA-23.Bad luck.Regards,Vitor

author: coromonadalix
author_rank: Super Contributor
timestamp: November 29, 2019, 11:27:13 am
content: Quote from: shakalnokturn on October 02, 2019, 04:56:20 pmIt seems ..... first link ask login password, the second one time out errors ...@Bicurico how much files did you got ??

author: Bicurico
author_rank: Super Contributor
timestamp: November 29, 2019, 11:35:09 am
content: I have got 32.4GB in 7.489 files and 394 folders.I legally downloaded the FTP site as a Guest, since there was no protection and the FTP site was listed on Google.I will NOT upload this anywhere, since I do not own any rights to do so (just in case someone was thinking of asking this).I can, if requested and when I have the time, take a look if a given file is available, like in the above request and send it to that particular person.Regards,Vitor

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: March 18, 2020, 09:06:38 am
content: No Secret but nice to know:https://updatemyunit.net/index.phpThis is the manual and firmware page for JDSU Devices.

author: dal
author_rank: Newbie
timestamp: October 24, 2024, 10:24:10 pm
content: Quote from: Bicurico on November 29, 2019, 11:35:09 amHi there hope you still are around. Do you happen to have this folder mirrored?ftp://ftp.germany.acterna.com/OLx-55_Firmware/Or anything related to OLx-55 or OLP-55?
Tektronix 453 High Voltage Transformer - Page 1
Forum section: electronics / testgear

author: Douglasfir
author_rank: Newbie
timestamp: October 26, 2024, 02:58:27 am
content: Hey everyone, i'm looking for a high voltage transformer for a tektronix 453. After troubleshooting mine appears to fairly quickly increase in current draw which blows the fuse (F937). Does anyone happen to have one or know of a source for one? Thanks so much!

author: tautech
author_rank: Super Contributor
timestamp: October 26, 2024, 07:00:49 am
content: Quote from: Douglasfir on October 26, 2024, 02:58:27 amWelcome to the forum.Presume you meanT930on P210 of the SM.https://w140.com/tekwiki/images/0/01/070-0755-02.pdfQ930 switches the primary supply and if the oscillator circuit is not working correctly the fuse F937 will protect the transformer.You have a short time to capture any oscillation with another storage scope however presume it's not working as it should and test all componentry meets their correct values.

author: colorburst
author_rank: Regular Contributor
timestamp: October 26, 2024, 09:11:57 am
content: Make sure to rule out other less serious causes before blaming the transformer. Some good starting points for troubleshooting are in Jerry Massengale's (RIP) thread:https://groups.io/g/TekScopes/topic/7643060If you are convinced the transformer is indeed bad, the best option may be to rewind it as any OEM replacement new or used would be on borrowed time as well. Apparently it's plagued by the same epoxy issue the 547 is known for, and unlike the 547, there were no replacements made. Dave Wise has posted a detailed guide how to do it successfully with minimal tools:https://www.antiqueradios.com/forums/viewtopic.php?p=2475599#p2475599

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 26, 2024, 10:30:43 am
content: Why I like the old Tektronix. The information is available.

author: Douglasfir
author_rank: Newbie
timestamp: October 26, 2024, 05:28:49 pm
content: There's no way I could ever possibly rewind this transformer. sigh. unless someone can do it for me and i can pay them, i guess the unit is going to the scrap heap.

author: factory
author_rank: Super Contributor
timestamp: October 26, 2024, 06:58:30 pm
content: Look for another 453 to pull the parts from, they seem fairly common still here, they can't all have bad transformers.David
Hantek DSO1202BV problem after update firmware - Page 1
Forum section: electronics / testgear

author: hranatybraska
author_rank: Newbie
timestamp: April 17, 2024, 12:30:11 pm
content: Hello,after update firmware my Hantek DSO1202BV scope didn’t boot succesfully.Firmware was originaly from sites of Hantek.I have connected to internal USART and i find that machine is alive.It seems the YAFFS2 filesystem is corrupted.Have you contact for anybody from service Hantek?Could you send me a backup or factory file please?Or its possible to repair the filesystem?Log from Putty:QuoteThanks

author: hranatybraska
author_rank: Newbie
timestamp: April 17, 2024, 01:52:50 pm
content: Quote

author: and_piotr
author_rank: Newbie
timestamp: October 24, 2024, 06:11:09 am
content: HelloI had the same issue, but I got second scope, without update. I did flash dump from it. If you have programmer for NAND flash chips I'll send it to you.
lecroy wavesurfer 422  - Page 1
Forum section: electronics / testgear

author: 4to20Milliamps
author_rank: Regular Contributor
timestamp: April 09, 2013, 03:41:39 am
content: I got this scope second hand , I imagine the front end is blown out of it but first things first....the firmware is wrong and I can't find a version that will work with it.DSO installer 3.8.0.3< software loads fine, all the controls work, inputs don't work, shows the scope as being a waverunner 800 seriesDSO installer 4.9.2.3< software installs fine, dso begins to initialize, dso crashes. sometimes it will start and then exit to windows when you operate the controls.DSO installer 6.8.1.4< installs fine, error message comes up saying dso has crashed, dso starts anyway, everything works except the input channels.Shows scope as being a wavesurfer 424 not a 422Dso installer 6.9.0.3< most recent update from LeCroy, recommended by their technical support that I contacted via email, won't install the firmware update, software installs fine, scope starts then a message comes up that says it has crashed.I would like to get the proper firmware installed on this before I tear into it, does anyone have one of these scopes? and if you do would you happen to have the restore disk? or know where I can find one.Thanks.

author: SparkyBruce
author_rank: Contributor
timestamp: January 24, 2017, 01:12:18 pm
content: Hello,I know that this is a very old topic , but I have just had exactly the same situation with my 424.The issue is lecroy use common software on all the scopes and what is happening is the scope cannot read what sort of scope it is.On my scope someone had ripped one of the four SMT connectors off the main board (where the PCI card connects) , and after a quick clean up and resolder (thankfully the pads were not ripped off the main board) everything is fine and working.Bruce

author: sprit
author_rank: Regular Contributor
timestamp: March 14, 2023, 11:34:44 am
content: Quote from: SparkyBruce on January 24, 2017, 01:12:18 pmi have this installer, if you want u can dm me.

author: Tehnik
author_rank: Newbie
timestamp: October 24, 2024, 06:00:04 am
content: Hello, if it's not too much trouble for you to share installer lecroy wavesurfer 422I also get an error
HP 400D Tantalum Capacitors? - Page 1
Forum section: electronics / testgear

author: KK7DTE
author_rank: Newbie
timestamp: October 21, 2024, 10:31:50 pm
content: I'm not finding tantalum capacitors listed in the HP 400D VTVM service manual, but I have two in mine and I have seen two others online with the same capacitors. How do I find their values? They are heavily corroded. Maybe there are other schematics or parts lists I'm not seeing? This unit's serial number is 28830. Picture below:

author: factory
author_rank: Super Contributor
timestamp: October 22, 2024, 01:03:05 pm
content: And what is it connected too? I can't tell from the picture.David

author: HalFoster
author_rank: Frequent Contributor
timestamp: October 22, 2024, 05:59:54 pm
content: Looks more like a diode to me...

author: factory
author_rank: Super Contributor
timestamp: October 22, 2024, 08:51:07 pm
content: Guessing it's these unlabelled parts on the layout drawing?They seem to be C20 & C31 in the earlier book here;https://www.kennethkuhn.com/hpmuseum/scans/hp400d_h.pdfC20 is 8uF 30V part #18-17 (aka 0180-0010 tantalum)https://www.parttarget.com/5910-00-644-3743_5910006443743_PP8B30A1.htmlC31 is 4uF 60V part #18-15 (aka 0180-0008)https://www.parttarget.com/5910-00-643-6892_5910006436892_PP4B60A1.html/David

author: factory
author_rank: Super Contributor
timestamp: October 22, 2024, 09:17:30 pm
content: Quote from: HalFoster on October 22, 2024, 05:59:54 pmApparently they are an early form of tantalum capacitor made by Fansteel, attached is an advert from 1956.David

author: KK7DTE
author_rank: Newbie
timestamp: October 22, 2024, 10:10:21 pm
content: Thats them! Thanks!!I can find the 8uF 30V easy enough, but the 4uF 60V is proving more challenging. I know with test instruments it is best to stick with the values assigned by the factory, but is there any flexibility here? Would and Aluminum Electrolytic be too different? I can get 8uF 50v much cheaper.Edit: I found the 4uF 60V at TTI. Now is $75 for both caps the best I can do? Are there cheaper alternatives to these wet tantalum caps?

author: Hexley
author_rank: Regular Contributor
timestamp: October 23, 2024, 02:15:33 am
content: Quote from: KK7DTE on October 22, 2024, 10:10:21 pmThese $2.50 modern film capacitors will have less leakage than those wet tantalums and should work well for you. Use a single piece for the 4 uF cap, and two more in parallel for the 8 uF cap.https://www.newark.com/illinois-capacitor/405phc400k/capacitor-polypropylene-pp-film/dp/30K6733

author: factory
author_rank: Super Contributor
timestamp: October 23, 2024, 12:58:44 pm
content: They are both in parallel to low value resistors, leakage isn't going to matter, I would go with some modern electrolytics at 4.7uF 100V and 10uF 50V.David

author: Dave Wise
author_rank: Regular Contributor
timestamp: October 24, 2024, 02:19:16 am
content: If you use aluminum electrolytics, I'd like to know how flat it is at high frequency. If I did it, I'd try either low-ESR parts, or parts with small series resistors and the combo paralleled with a moderate-size (say 10nF or 100nF) film or ceramic part. Like HP did in late production.