hybridfree/eevblog-posts huggingface dataset:
Advantest r3762AH Network Analyzer Service Manual - Page 1
Forum section: electronics / testgear

author: SuperMario
author_rank: Contributor
timestamp: October 26, 2022, 02:56:44 am
content: Hi,I am looking for Advantest r3762AH Network Analyzer Service Manual. Have this great instrument but missing S-Parameter set (R3961A) and I want to explore communication bus between the test set and the analyzer. If someone have spare test set for sale, please let me know.Thanks
Zonic/A&D AD3525 FFT analyzer--Schematic/Manual available? - Page 1
Forum section: electronics / testgear

author: N2IXK
author_rank: Frequent Contributor
timestamp: August 08, 2015, 01:51:19 am
content: Just dumpster dived this thing (1991 vintage 100 kHz audio FFT analyzer with built-in signal generator), and am in need of a service manual/schematics to try to bring it back to life. When powered up, it lights EVERY front panel light and emits a continuous BEEP. That's it. All the internal LEDs on the PSU board light, so presumably all the power rails are OK, and the CRT filament lights up.After much digging, I was able to find a Japanese language .PDF of the operators manual, but nothing as far as repair/troubleshooting. I tried all the obvious stuff like reseating boards, looking for burned/damage parts, etc. Anyone out there able to help with this one? It appears that Zonic went bankrupt a few years back, and these products were absorbed into IOTech, then into National Instruments, who no longer offer any support.

author: newmedia
author_rank: Newbie
timestamp: March 19, 2016, 02:40:21 pm
content: Hello:Maybe I can help. I have 2x volumes of documentation for the 3525/24 (in English) that I paid $300 for in 2005 from AND in Tokyo. Unfortunately, the schematics/parts section is incomplete. What I'm now looking for are the calibration instructions.I have 2x complete 3525 units (one of favorites in my FFT collection) and another set of plug-in boards and might be able to help get yours going. And if you're the same N2IXK who the FCC thinks lives in Teaneck, I'm in Jersey City.Mark

author: Sören_Marodören
author_rank: Contributor
timestamp: August 02, 2020, 09:20:02 am
content: Hi,I wonder if N2IXK or Mark have a scanned copy (pdf) of the manual/schematic?If not I wonder if you are able to create one? Or at least take photos of the schematics and send to me?I'm in desperate need of it and there seems not to be any available on the internet.(The only documentation I have found is in Japanese and only marketing material.)I have just recently bought an AD-3525 that is working for 3 minutes and then freezes.Probably a clock that stops working during warm-up. Can be tricky to find. But I will give it a try.Thanks in advance,/Sören

author: N2IXK
author_rank: Frequent Contributor
timestamp: August 04, 2020, 01:37:47 am
content: Sorry, have nothing. Dumped my unit in broken condition at a hamfest a couple years ago.

author: Whitefoot
author_rank: Contributor
timestamp: October 25, 2022, 10:53:43 pm
content: ElektroTanya.com now has a service manual posted for the Zonic/A&D 3524/3525.
UT61E plus vs Brymen 257s vs Brymen 235 vs Ut195T - Page 1
Forum section: electronics / testgear

author: raresvintea
author_rank: Contributor
timestamp: October 21, 2022, 06:13:01 pm
content: Hello, i want to change my old multimeter, ut 61e, a good one for me. I don't usually do main meas.B257s is a good one, diode voltage is low,B235 is a good multimeter with LoZ, without bargraphut61e plus has a plus in counts but lacks LoZ, what voltage has when measuring diodes?,ut 195 is a rough varriant with loZ and a torchI want a quick range multimeter, eventually LoZ, AA or AAA battery is a plus for meHave a nice day

author: mcinque
author_rank: Unknown
timestamp: October 22, 2022, 07:40:34 pm
content: avoid uni-t, stick to brymen. just better quality, roughness, specifics, accuracy, calibration stability etc.

author: rsjsouza
author_rank: Super Contributor
timestamp: October 22, 2022, 10:01:26 pm
content: The newer UNI-T models are mechanically quite well built - much better built than the UT61E (I have an UT89X that is quite similar to the UT195).Electrically I can tell that at least the UT89X is very fragile - good for low-power electricity/electronics use. The UT195 is very robust, judging by the review and photographs below:https://lygte-info.dk/review/DMMUNI-T%20UT195DS%20UK.htmlThe UT195 is a relatively expensive model for a 6000 count meter, rivaling with Brymens BM235 and BM257 in this regard. However, it has quite a number of interesting features that can be useful for electronics, such as 20kHz bandwidth and 20+MHz frequency meter, as well as a reasonable capacitance meter (Uni-T tends to do good in this feature). However, this model is very new and does not have the track record of the aforementioned Brymens.You should be good with any of these models.

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: October 23, 2022, 01:09:19 am
content: I have the Unit ut61E+, I am really very satisfied.

author: nightfire
author_rank: Frequent Contributor
timestamp: October 23, 2022, 01:33:40 am
content: For the price of the Uni-T UT61E you also could afford a Brymen 786- and would support the EEVBlog ;-)(At least judging from the actual prices in germany)(I admit I am also a bit confused by the pricing, seems that in germany some prices just take a big jump)

author: raresvintea
author_rank: Contributor
timestamp: October 23, 2022, 07:32:51 pm
content: Hello and thanks everyone for answers.In my diy projects it is usefull a higher diode voltage testing. What about this ut-61e plus? Otherwise i would go for this for Bm235, a good multimeter. BM237 is a very good choice, but pc connection is not a plus for me, nor the lower voltage diode testing. Many people said it has a useful bargraph.

author: J-R
author_rank: Super Contributor
timestamp: October 25, 2022, 07:15:52 am
content: Even a 3V diode test voltage may not be enough in some cases.The 121GW can switch between 3V and 15V.Could you not use a power supply for your diode testing?Or could you stretch your budget for the BM867s?
KEYSIGHT 1252b not reading voltage ranges up to unlimited voltage  - Page 1
Forum section: electronics / testgear

author: FF1776x1
author_rank: Newbie
timestamp: October 25, 2022, 04:16:52 am
content: I have a keysight 1252b and it won't read voltage correctly when I apply voltage it just ranges up then starts beeping . If I temporarily apply 3 volts or so it will climb to unlimited voltage until voltage removed . I think the beeping is the over voltage alarm because I see it climb and go to 1000 almost instantly and start beeping . I tried to turn on filter in settings and it does the same thing . Took it apart all components look in good condition no visual damage . What could be causing this ? What boards or components should I target for repair/test ? Are any firmware updates out for this model ? Thanks for any help

author: Kleinstein
author_rank: Super Contributor
timestamp: October 25, 2022, 07:49:15 am
content: This does sound like a serious problem, like an amplifier working as an intergator instead of amplifier. This could happen when a feedback resistor is lost / disconnected.Another problem could be a similar failure in the ADC.The problem is that chances are that all this is internal to the central chip. So chances are high this meter is beyound repair.Are at least the current ranges and maybe AC working OK ?A first usual check are the batteries - best case just the low bat check failed, though it is unlikely a low bat would cause such symptoms.
Siglent SDG6022 Arbitrary Function Generator, stops at the splash screen   - Page 1
Forum section: electronics / testgear

author: gogoman
author_rank: Regular Contributor
timestamp: October 22, 2022, 02:52:39 pm
content: Hello, I'm looking for a miracle solutionto unbrick my SDG6022,It happen while reading a waveform from the generator to the Easy Wave software. The generator appeared non responsive so I cycled the power to the generator. :. At power up the Siglent logo blinks, followed by faint clicking, then stops on the logo screen.Repeated power cycling does not fix the problem, because the FW update is accessible through the user interface the FW cannot be downloaded, the front panel buttons are unresponsive.Disconnecting the USB from the host did not fix the problemThis sucks, the arb, is new to me and has seen very little usage, your help is appreciated

author: gogoman
author_rank: Regular Contributor
timestamp: October 22, 2022, 10:03:17 pm
content: Anther SDG6022X is alive in all its signal gloryThank you Siglent God for the patch

author: Martin72
author_rank: Super Contributor
timestamp: October 22, 2022, 10:30:02 pm
content: What patch ?Go into detail pls, so everyone can participate from..

author: tautech
author_rank: Super Contributor
timestamp: October 23, 2022, 02:13:36 am
content: Quote from: Martin72 on October 22, 2022, 10:30:02 pmThis Siglent god with his little bag of tricks.Quote from: gogoman on October 22, 2022, 10:03:17 pmGood, well done.Updated to latest too ?

author: balnazzar
author_rank: Frequent Contributor
timestamp: October 23, 2022, 12:40:13 pm
content: One SDS5000 kind of 'died' in my hands a few days ago.It was working flawlessly, I rewired the circuit on the breadboard and pushed AUTO. 2 minutes later, it was still trying to adjust. So, I pushed the shutdown button. The scope did not shut down. Completely unresponsive.So I detached the power cable. Reattached it, and tried to boot it. Stuck at the splash screen. I got reprimanded, by the way.Today it's still non-operational and will be sent back to the distributor.

author: gogoman
author_rank: Regular Contributor
timestamp: October 23, 2022, 04:08:46 pm
content: Quote from: tautech on October 23, 2022, 02:13:36 amupdated to the latest FW
Found  / Searching for the last free Keysoght Benchvue - Page 1
Forum section: electronics / testgear

author: coromonadalix
author_rank: Super Contributor
timestamp: October 23, 2022, 05:23:24 pm
content: Hi @ll i think v3.7 was the last versions seen on a few forums and hereBUT on Keysight it's kinda a loop to download it, it doesn't work for me (registered) and they say it require a license ??It's to play with an L4411AthksFound, thks to a memeber .......... well it sucks, an huge package, aaannnddd require a license

author: jusaca
author_rank: Unknown
timestamp: October 24, 2022, 11:26:07 am
content: Yes IMHO Keysight PC software really sucks.Huuuge bloated software, which installs more Licensing background stuff than anything I have ever seen...

author: Messtechniker
author_rank: Frequent Contributor
timestamp: October 24, 2022, 01:10:37 pm
content: Agree. Got rid of it as quickly as possible.Would not touch it even with a barge pole.Or as the Germans say: "Würde ich nicht malmit der gynäkologischen Zange anfassen"Now using "Test Controller" (long thread in this forum,by the way) instead.Its freeand comes with the best support I've ever had.Comes with a huge number of device drivers.Moreover, you can roll your own based on existing onesand "HKJ" will be pleased to help you along.
TEKTRONIX TDS 350 - option 14 board / or from compatible model. - Page 1
Forum section: electronics / testgear

author: alitronix
author_rank: Contributor
timestamp: October 11, 2022, 09:53:33 pm
content: Hi, I'm looking for a "module" option 14 (to buy) for my tek tds 350.All I want is the VGA output , for some reasons that is what I want to use from the module.If someone have to sell/donate I'm interested.I'm looking also for a 350 defective one to buy, from were I want to pull it out the option.Any suggestion or info/link is good for me.Thank you,Alinthis is for Europe.

author: alitronix
author_rank: Contributor
timestamp: October 15, 2022, 04:45:15 pm
content: ok... what I miss? I asked in wrong place?any information about the subject in good for me.Thank you.

author: james_s
author_rank: Super Contributor
timestamp: October 15, 2022, 06:03:20 pm
content: It's fine to ask here, the likely answer is that nobody has one of these available, they were relatively rare in my experience.Fortunately for a TDS300 series you don't need a module, the VGA signal is available from a header on the main PCB so all you need is a VGA connector, a PC slot bracket from a video card and a ribbon cable to assemble your own.

author: alitronix
author_rank: Contributor
timestamp: October 22, 2022, 04:40:13 pm
content: yes , I confirm it, is not very clear if you look at the service manual,but after a close look at the board and in service manual and also hooked up an another oscilloscope on the connector I figure it out how to connect the VGA DB connector.I put some pics below maybe someone it interested in, there is also the pin-out configuration of the connector.

author: james_s
author_rank: Super Contributor
timestamp: October 22, 2022, 05:43:49 pm
content: I think it's deliberate that it's not very clear, Tek wanted to sell the expensive option, they didn't want people just hacking in a connector.Looks like a nice clean job.
Flexible Oscilloscope probes (cables) - Page 1
Forum section: electronics / testgear

author: MRiddickW
author_rank: Contributor
timestamp: October 14, 2022, 04:25:22 pm
content: Hi all, I'm ready for a bit of an upgrade from the probes that came with my Rigol (the ones with the orange 1x/10x switch that sticks out).Does anyone make reasonably priced (<$60/probe) oscilloscope probes with cables that are decently flexible? I understand that coax can only get so flexible, but hopefully there's something a little better at least.I'm looking at 10x non-switchable. Maybe I'd a get a single 1x non-switchable just in case; but I'm tired of wondering if spurious measurements are from the circuit or the crappy switch.Having experienced the flexibility of Probemaster 8000 series multimeter probes, I've been looking at the4904-2, but am open to suggestions.The cheaper the better of course, with the understanding that you get what you pay for. I've done some searching on this forum and elsewhere but couldn't find any strong suggestions. I've done the Rigol hack on my DS-1054 so 100 MHz+ to support would be ideal.Thanks!

author: BillyO
author_rank: Super Contributor
timestamp: October 14, 2022, 04:48:27 pm
content: The ones that came with my Siglent scope are pretty good flexibility wise. I do not know what the Rigol ones are like, but these Siglent supplied ones are more supple than my old Tek probes.

author: bdunham7
author_rank: Super Contributor
timestamp: October 14, 2022, 04:53:28 pm
content: I was going to recommend that exact Probemaster, perhaps buying one deluxe kit and one 1X/10X (their switches aren't crap).However, if you want cheap, the probes sold on eBay as the P2301B are not terrible and can be had pretty cheaply. They're a bit bulkier, but I find them easier to grip.

author: MRiddickW
author_rank: Contributor
timestamp: October 21, 2022, 06:28:13 pm
content: Awesome, thanks for the suggestions!And I do sure like that beefy ground clip on the P2301B as well.
Looking for details on Tek AFG5101 Option 02 PCB. - Page 1
Forum section: electronics / testgear

author: TERRA Operative
author_rank: Super Contributor
timestamp: September 11, 2022, 05:09:03 am
content: Hi all,I'm thinking of creating my own version of the Option 02 PCB for my Tektronix AFG5101 arbitrary function generator, but the service manual seems a bit lacking in parts lists...The schematics seem to have the needed part details for all parts except Transistors Q900, Q901, Q902, Q903, IC's U905, U914, and Crystal XTAL900.Below is a link to an image showing the locations of the parts highlighted that I'm missing the details for.Can someone who has this option in their AFG5101 pull the board out and let me know what the part numbers for these parts are?Some photos of the parts and the entire board would be greatly appreciated too, if possible.If I'm successful in replicating this option PCB, I'll release the gerbers and BOM for others to use too.

author: TERRA Operative
author_rank: Super Contributor
timestamp: October 21, 2022, 05:05:01 am
content: Still looking for this info if anyone out there has this option board?Please?....
Any owner of HP 8757C on the forum? Need a favor for EPROM dumps - Page 1
Forum section: electronics / testgear

author: rplabs
author_rank: Contributor
timestamp: October 20, 2022, 02:44:31 pm
content: Hello,I have a 8757C with version 3.2 and I would like to upgrade it to 6.2 but I cannot find any dumps for the "C" model.In fact any version for C model higher than 3.2 is good.Thanks!
Oscilloscopes running on Linux/Unix - Page 1
Forum section: electronics / testgear

author: oxy
author_rank: Newbie
timestamp: September 12, 2022, 11:49:35 am
content: Can anyone help me draft a list of oscilloscopes running on Linux/Unix OS?Thanks!

author: pcprogrammer
author_rank: Super Contributor
timestamp: September 12, 2022, 11:56:09 am
content: Hantek DSO2C10, DSO2C15, DSO2D10, DSO2D15Rigol MSO5000 seriesAre the ones I know of.

author: tv84
author_rank: Super Contributor
timestamp: September 12, 2022, 01:41:35 pm
content: - Keysight 1200X series- R&S RTB2000- There are also some new Teks.- All Siglent recent scopes.- All Rigol recent scopes.

author: switchabl
author_rank: Frequent Contributor
timestamp: September 12, 2022, 02:20:30 pm
content: Did HP/Agilent ever make an oscilloscope running HP-UX? I have definitely seen it on a spectrum analyzer (from the 90s or early 2000s), remember it took >10 minutes to boot, very annoying. I think there were some Unix-based logic analyzers as well.

author: nctnico
author_rank: Super Contributor
timestamp: September 12, 2022, 02:36:20 pm
content: Quote from: switchabl on September 12, 2022, 02:20:30 pmFor sure. Tektronix DAS9200 runs on some kind of Unix (forgot the name).

author: alm
author_rank: Super Contributor
timestamp: September 12, 2022, 02:48:21 pm
content: The HP 16700 series logic analyzers ran HP-UX. There were scope cards for this logic analyzer. Also before that the HP 16505A prototype analyzer, which was used together with the 16500-series logic analyzer. The later 16900 series ran Windows.It wouldn't surprise me if some of the high-end HP scopes, like sampling mainframes, ran HP-UX in the 90s, but I'm not familiar with those.

author: Zoli
author_rank: Frequent Contributor
timestamp: September 12, 2022, 03:01:03 pm
content: The HP 3070 series II&III ICT(in-circuit tester) runs HP-UX.

author: uski
author_rank: Frequent Contributor
timestamp: September 12, 2022, 07:57:03 pm
content: Quote from: tv84 on September 12, 2022, 01:41:35 pmYou sure about that ? I don't think they do

author: Hydron
author_rank: Super Contributor
timestamp: September 12, 2022, 08:06:57 pm
content: Yeah almost certain that isn't - boots up too fast, has references to an rtos and someone on the forums has done some reverse engineering too.Also micsig run Android I think, which is also Linux.

author: tautech
author_rank: Super Contributor
timestamp: September 12, 2022, 08:07:33 pm
content: Quote from: oxy on September 12, 2022, 11:49:35 amSerious question, Why ?

author: Gerhard_dk4xp
author_rank: Frequent Contributor
timestamp: September 13, 2022, 01:38:10 am
content: I once ran Knoppix Linux from an installation DVD on my 54846B.It is weird to see Open Office on a scope screen. :-)And running is the completely wrong word. It barely crawls.The real reason was to save the contents of the hard diskjust before it failed completely. dd via network.Gerhard

author: pdenisowski
author_rank: Super Contributor
timestamp: October 21, 2022, 01:04:48 am
content: Now that it's no longer a secretThe R&S MXO4 runs Linux as well
CSI6010/TP3030E schematic - Page 1
Forum section: electronics / testgear

author: listener192
author_rank: Newbie
timestamp: October 20, 2022, 02:39:11 pm
content: Hi,Does anybody have the schematic for the CSI6010/TP3030E bench DC power supply, photo attached?I have replaced the inverter MOSFETS and the drive transistors,zeners and gate resistors that had also failed, but I dont think I am getting any drive as advancing the current pot from causes some hunting type noise indicating its trying to start but something is missing in the feed back.I dont think I will get much further without a schematic unless someone has repair experience of this power supply?Appreciate any help.RegardsBarry
HP 6673A Terminal Block Size - Page 1
Forum section: electronics / testgear

author: pmendiuk
author_rank: Contributor
timestamp: October 14, 2022, 09:01:14 pm
content: Hey all,Does anyone know the size or part number for the removal terminal plugs for the HP6673A power supply rear analog and digital connectors?

author: pmendiuk
author_rank: Contributor
timestamp: October 15, 2022, 01:51:24 am
content: Wow nobody with any HP gear with a rear terminal block? I bought the Power Supply and hoped I could get some terminal blocks before it arrived.

author: AVGresponding
author_rank: Super Contributor
timestamp: October 16, 2022, 09:56:34 am
content: Any pics?Not sure about that particular model but my Agilent and HP system psu's use Phoenix Contact connectors. You need to take care to choose the correct pitch, as there's both 5mm and 5.08mm, and they aren't interchangeable.

author: pmendiuk
author_rank: Contributor
timestamp: October 18, 2022, 05:18:47 pm
content: I haven't received the power supply yet. Here is a link to a picture of the digital terminal strip on a really rough looking unit. I couldn't figure out how to insert the image.https://www.ebay.com/itm/185246865097?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&mkscid=101&itemid=185246865097&targetid=1263094005346&device=c&mktype=&googleloc=9051502&poi=&campaignid=14859008593&mkgroupid=130497710760&rlsatarget=pla-1263094005346&abcId=9300678&merchantid=113417915&gclid=Cj0KCQjwnbmaBhD-ARIsAGTPcfWQDCCXDJBoUIU36I1YdATZP-uE11W2LL9-h46O0ahelejqOc-6XJ8aApmREALw_wcB

author: AVGresponding
author_rank: Super Contributor
timestamp: October 18, 2022, 06:00:18 pm
content: Yeah, that's a Phoenix Contact style. You'll need to measure the pitch though, or buy one of each!5mm pitch5.08mm pitchAs you can see they look identical to the naked eye.Good luck getting it working, that's a real beast of a PSU.

author: pmendiuk
author_rank: Contributor
timestamp: October 18, 2022, 10:11:00 pm
content: The power supply is due to be delivered tomorrow so I'll wait and measure the pitch of the connectors. It's quite a lab power supply, there are no wimpy connectors, the output terminals are 1 inch copper bus bars. Hopefully everything checks out OK and it just needs a calibration which I hope to do myself.
Questions about configuration options on Siglent SDS1104X-E - Page 1
Forum section: electronics / testgear

author: three_jeeps
author_rank: Contributor
timestamp: October 17, 2022, 05:38:02 pm
content: I am learning my way around this siglent scope and am looking at ways to store scope configuration options.In 'internal' storage, config files seem to be given numeric names, eg. 01, 02 etc.Is there any way to overwrite the file name so that it has some meaning?Directing config information to the external USB stick allows one to name the config file.What is the difference in config file information between these two methods?Lastly, the instructions for saving to internal memory say to 'connect the signal to the oscilloscope and obtain stable display'...In order to use this feature, do I have to have a signal? What if I just want to save the scope settings?What is the difference (content wise) between the two configuration saving modes?Thanks

author: tautech
author_rank: Super Contributor
timestamp: October 18, 2022, 07:46:20 am
content: Quote from: three_jeeps on October 17, 2022, 05:38:02 pmNo, only when saving to External (USB) where you can name the XML file whatever you like.See screenshot #16QuoteI don't know for sure but maybe designers where concerned about the best use of the Internal space available.QuoteNo signal required but do consider the warning a stable display should be gained is to warn that unless it is, your settings are not optimal and therefore should not be saved as a Setup.For different but regular jobs we each might have preferred settings so being able to recall known working settings is convenient and that is the Save/Recall Setup primary function however it can also be useful for guidance when scope settings that should work don't.A recent example was I'd thought I'd found a bug and Siglent asked for a Setup file to help diagnose what the issue was and it was how the scope was set at my end, in particular a Trigger setting IIRC which after the scope was Defaulted disappeared of course. Felt like a muggins but I learnt a valuable lesson....not all settings are always visible and don't be scared to use Default to return the scope to settings that for most jobs will always work !Which conveniently brings us to another useful and powerful feature in these scopes....User Default.Also in the Save/Recall menu>Save type = To Default Key> Factory SetuporCurrent Setup. (Toggle between the 2)With this we can have any feature in how the scope is set assigned to the Default key as our preferred personal setup. # of active channels, their reference (0V) level, V/div and timebase setting, Trigger level and settings and the list goes on and on.There are some considerations be to aware of and best advice is to Default the scope before setting and saving a User Default so to be sure some obscure hidden setting is not saved into a User Default.Some screenshots as examples.
SRS SR715/720 LCR Meter Schematics Needed Please! - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: October 15, 2022, 03:54:34 am
content: I am looking for the schematics for the SRS (Stanford Research Systems) SR175/720 LCR Meters. These were supplied in the hard copies of the original manuals for the products but do not appear in any PDF that I have found and I have looked in all of the usual places.Thank you for any help you can render.SamW3OHM

author: coromonadalix
author_rank: Super Contributor
timestamp: October 15, 2022, 04:20:44 am
content: you can order them directly at SRS, they will ask around 120$ for it, thrust me i've tried ... no schematics leaked on the web to my knowledgeBUTI think there was some resemblance srs715 10khz with this one : HP E4925A LCR METER and this one too i did not found any schematics

author: _Wim_
author_rank: Super Contributor
timestamp: October 15, 2022, 06:25:54 am
content: You could try and contact barnacle2k who has (or had) at least a paper copy:https://www.eevblog.com/forum/testgear/stanford-research-sr715-lcr-meter-teardown/

author: _Wim_
author_rank: Super Contributor
timestamp: October 15, 2022, 06:42:35 am
content: Or you can contact this person for an affordable paper copy:https://www.clmt.de/service-manuals/

author: scopeman
author_rank: Frequent Contributor
timestamp: October 16, 2022, 12:10:03 am
content: Quote from: _Wim_ on October 15, 2022, 06:25:54 amI have but have not heard from him. I scanned one of the SRS FFT analyzer manual and the SRS 345 manual with schematics years ago from and them put up on one of the manual sites. I was hoping that someone would have done that for the 715/720. The schematics come standard with the instrument manuals, at least they used to.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 19, 2022, 08:12:37 am
content: Only things i've found outNo schematics but part list in one documentEDIT same links as another srs 715 thread, no merit here loll

author: SoundTech-LG
author_rank: Frequent Contributor
timestamp: October 19, 2022, 03:46:43 pm
content: $120 might be reasonable, but only if they (SRS) provides all Revisions, Board layouts, and parts lists.Why do I doubt they do that???A lot of their products go through major revisions and no documentation on that at all.Quote from: coromonadalix on October 15, 2022, 04:20:44 am
Rohde & Schwarz FSP40 Windows XP trouble - Page 1
Forum section: electronics / testgear

author: g7kbr67
author_rank: Regular Contributor
timestamp: October 21, 2022, 10:50:50 am
content: Hi AllI have a Rohde & Schwarz FSP40 which on bootup shows an error missing or corrupt \WINNT\SYSTEM32\CONFIG\SYSTEM, You can attempt to repair this file by starting Windows Setup using the orginal Swtup CD-ROM.I don't have and can't find an original DVD, can anyone help with this error and fix? I have attached a couple of photos showing detail of unit and fault.RegardsPaul
RTB2004, XY mode and math - Page 1
Forum section: electronics / testgear

author: piranha32
author_rank: Unknown
timestamp: October 18, 2022, 03:15:49 am
content: Hi,I'm setting up an educational experiment using RTB2004 for which I would need to show result of a math expression v.s. one of the channels. XY mode would work perfect, but according to the manual I can only use channels as inputs.While searching the forum for ideas I noticed that not all features of the scope are documented in the official manual, so maybe someone knows a trick how to map a math expression to one of the X/Y axes?I'm using SCPI commands to set up the scope, and replacing CHx with Mx in the source selection command does not work.
Any advantage of an HP 4195A vs SVA1032x VNA ? - Page 1
Forum section: electronics / testgear

author: PartialDischarge
author_rank: Super Contributor
timestamp: October 16, 2022, 05:39:00 pm
content: I have a Siglent SVA1032x, but I could get my hands on a HP 4195A. The 4195A is limited to 500MHz but goes down to 10Hz.For those who know this old equipment is there any technical advantage having it vs a modern VNA?

author: chilternview
author_rank: Frequent Contributor
timestamp: October 17, 2022, 06:35:23 pm
content: Things I can think of:- able to do full S parameter measurement (S11, S21, S22, S12) without changing connections.- flexible as has 2 outputs and 4 inputs, no hardwired directional coupler/splitter- can display up to 4 traces from 4 separate inputs- separate impedance measurement as well as vna/spectrum modes- Able to sweep not just frequency but also power, DC bias can be swept.- built in BASIC programmingDisadvantages:- a big heavy beast- on some settings (narrow RBW) can be very slow.- needs e.g. 41952 test fixture to provide splitter/directional couplerTHe attached user guide might give some idea on what you can do with it. I find it very useful

author: simba15
author_rank: Regular Contributor
timestamp: October 17, 2022, 06:40:31 pm
content: I may have a HP 41951A Impedance test set available for sale soon.Let me know If you go the HP Route and are interested.

author: G0HZU
author_rank: Super Contributor
timestamp: October 17, 2022, 07:11:50 pm
content: I used one of these quite often from about 1990 onwards. The HP 4195A is a very capable and versatile instrument but it can be very slow to make a measurement compared to other instruments. The sweep time in VNA mode is very slow, presumably because it uses an old/slow internal processor.The ability to measure down to a few Hz sets it apart from many alternatives, even today. Otherwise, it is slow and has limited dynamic range. The HP 4195A can also be used as a spectrum analyser but it is going to be quite slow in this mode too.I've not used the Siglent SVA1032x, but I get the impression from reviews that it is at its best as a spectrum analyser. The performance in VNA mode is fairly mediocre.
Agilent 54831M Oscilloscope Service Disk - Page 1
Forum section: electronics / testgear

author: bostonman
author_rank: Super Contributor
timestamp: December 30, 2021, 12:19:15 am
content: I posted this conversation in the HP forum, but nobody responded; I assume due to not having an answer and thought to post here.My Agilent scope works fine but reports the attenuators are near end-of-life. While this isn't a problem, I fear the software may one day decide to lock the scope should the count reach some set maximum.From research, I can reset this count by using a 'service disk', but can't find it anywhere.Two questions: does anyone have a service disk, and, does anyone know where to get replacement attenuators? The service manual seems vague about their location and part numbers, and, maybe in the future I'll need to replace them.

author: bostonman
author_rank: Super Contributor
timestamp: October 16, 2022, 01:37:52 pm
content: On a long shot I figured I'd bump this.
DE-5000 "GOE" PSU 230V leakage current measurement request - Page 1
Forum section: electronics / testgear

author: 74HC04
author_rank: Contributor
timestamp: October 16, 2022, 01:39:44 pm
content: After an unsucessful attempt at modifying a linear PSU for use with my DE-5000 LCR meter (with our 50Hz supply, it would appear I need better ripple reduction as the meter is unstable measuing AC resistance at 120Hz), I would like to find a switching supply with similar characteristics to the GOE brand sold for use with the DE-5000. Either that or I will need to return to the linear PSU project.The GOE unit is very expensive to buy from Japan for what it is and I'd much rather have one with a type G plug than have to improvise with an adapter (and, ideally, make unshrouded "live" pins difficult to access).I am concerned about killing my DE-5000 through ground leakage (making human body contact with a test lead) if I make the wrong choice of class II ITE switcher and am currently considering medical grade supplies instead (also class II, as the class I units tend to be very high power).Would anyone with a 660mA / 1A GOE brand unit (it looks like at least 3 different models are out there) and a 230V/240V 50Hz supply be kind enough to measure the AC leakage current to ground for me please? (Greatest value measured when the AC plug has been tested in both orientations please).In the meantime, I will go back to improving the filtering of the ancient "universal" linear mains adapter I've been working on (in short, in stock form it was little more than a transformer, rectifier, 470uF electrolytic, potential divider switching resistors connected to an LM317 and a 10nF output capacitor).
DG811 hack to convert to DG900 - Page 1
Forum section: electronics / testgear

author: suspension
author_rank: Regular Contributor
timestamp: October 16, 2022, 11:18:38 am
content: Hi allI am shopping for a DDS function generator these days and while going through reviews encountered this thread:https://www.eevblog.com/forum/testgear/new-rigol-16-bit-function-generators-dg800900-series/msg2419773/#msg2419773which explains how the Rigol DG811 can be hacked to work as a DG900 series generator seemingly without too many issues. However, I was not able to find any official guide and latest status of this hack anywhere else. Can someone let me know if this hack still works and if there are any issues that were discovered later?ThanksSus

author: coromonadalix
author_rank: Super Contributor
timestamp: October 16, 2022, 01:05:08 pm
content: You should have asked in the related thread instead of creating a new one ??

author: trp806mo
author_rank: Regular Contributor
timestamp: October 16, 2022, 04:22:04 pm
content: You huld read it again, it's well explained (only a matter of firmware update). The only "issue" is that the output level is not calibrated for upper frequencies (a lot of drift in mine). If you have question please asked them in the related thread
Rigol DM3058E Beep Volume: Can it be increased? - Page 1
Forum section: electronics / testgear

author: GrievousAngel
author_rank: Contributor
timestamp: October 15, 2022, 10:25:52 pm
content: Anyone know the trick to increasing the volume of the 'Beep' as in Continuity near zero?Thanks

author: jjoonathan
author_rank: Frequent Contributor
timestamp: October 16, 2022, 12:54:30 am
content: Sounds like it has to be a physical mod.
DIY Active Differential Probes for Audio Applications - Page 1
Forum section: electronics / testgear

author: GrievousAngel
author_rank: Contributor
timestamp: October 15, 2022, 10:50:36 pm
content: I am looking an active differential probe suitable audio signal analysis. I would like to pull a -80db signal out of the world of noise, etc! Single-ended probes often fall short even with 'Signal Averaging' and other mathematical tricks found on instrumentation gear.Do y'all know of a DIY kit or an reasonably priced manufactured product?I have a PICO 4262 USB Scope designed for Hi-Res audio applications (16 bit, 5MHz) and a Rigol DM3058E 5-½ DMM, and they both would benefit from a good differential probe set when looking around the 'floor' level. I don't do many higher voltage level stuff.Suggestions?Later
3D printable case for Analog Discovery 2 - Page 1
Forum section: electronics / testgear

author: Fungus
author_rank: Super Contributor
timestamp: October 13, 2022, 05:28:45 pm
content: Here ya go:https://www.printables.com/model/104931-digilent-analog-discovery-2-bnc-adapter-caseI knew there had to be one somewhere.

author: balnazzar
author_rank: Frequent Contributor
timestamp: October 14, 2022, 06:40:07 am
content: Quote from: Fungus on October 13, 2022, 05:28:45 pmThat's exactly what I searched for, without any luck.. Thanks Fungus!

author: balnazzar
author_rank: Frequent Contributor
timestamp: October 14, 2022, 09:05:20 am
content: Quote from: Fungus on October 13, 2022, 05:28:45 pmPardon me, but, what's the .skp file for??

author: Fungus
author_rank: Super Contributor
timestamp: October 14, 2022, 12:02:03 pm
content: Quote from: balnazzar on October 14, 2022, 09:05:20 am.skp is a Sketchup file. I'm guessing they drew it in Sketchup then exported as .stl files.(ie. You don't need the .skp for printing)

author: balnazzar
author_rank: Frequent Contributor
timestamp: October 14, 2022, 06:27:52 pm
content: Ah, understood. Thanks!Let's try and find an online on-demand 3d-printing service now

author: luma
author_rank: Regular Contributor
timestamp: October 14, 2022, 06:28:47 pm
content: Oh hey, I’m the idiot still using SketchUp for some reason, sorry about that. I keep thinking I’ll dive into F360 but then AutoDesk keeps playing games with the licensing and well… I already know how to use SketchUp so .SKP it’s going to be for a while.Hope you enjoy the enclosure, I’m still using it regularly several years later and it has lived up to the (ab)use.

author: balnazzar
author_rank: Frequent Contributor
timestamp: October 15, 2022, 04:27:14 pm
content: Quote from: luma on October 14, 2022, 06:28:47 pmYou did a quite useful thing, thanks! Digilent definitely owes you oneOne thing one could do along the same line would be 3D printing some sort of 'cage' to hook a benchtop scope to a VESA arm.
Big Variation in LiteVNA Prices? on Aliexpress vs bangood vs others - Page 1
Forum section: electronics / testgear

author: Akbar
author_rank: Contributor
timestamp: October 15, 2022, 09:19:17 pm
content: I have been looking at getting a cheap VNA for learning about RF filters and I am thinking of getting the LiteVNA-62 since I mostly want to use it with a PC and it has a good frequency rangeNow what I found is the prices are as low as 85USD and as high as 105USD, the most expensive one is marked as Original Hugen while the others are not, Bangood has them as well but they are even more expensive being upwards of 130USD so Now I am wondering is it even worth risking saving money ? I am in a dilemma to potentially save money or be stuck with a 75 day dispute...
How does this power amplifier communicate with the function generator? - Page 1
Forum section: electronics / testgear

author: Ben321
author_rank: Frequent Contributor
timestamp: October 14, 2022, 10:25:49 pm
content: I was thinking about buying this Rigol power amplifierhttps://www.tequipment.net/Rigol/PA1011/Preamplifiers/for my Rigol function generator, but I'm not quite sure how it works. From what I read, it appears to be able to be controlled by the function generator itself, but I'm not sure how the FG controls the PA. Does it use the normal signal BNC cable, and transmit control data modulating a carrier wave well above the maximum normal output frequency of the FG's standard output? Or does it use USB or Ethernet data ports on the FG for control?

author: Kean
author_rank: Unknown
timestamp: October 14, 2022, 10:58:04 pm
content: It has a USB interface which can be connected to a PC, or to some Rigol models like DG1022 or DG5000 series.Look for a document called "PA1011 Application Notes"

author: Ben321
author_rank: Frequent Contributor
timestamp: October 15, 2022, 02:24:32 am
content: Quote from: Kean on October 14, 2022, 10:58:04 pmOk. Thanks.I noticed they are also quite expensive, almost as expensive as the function generator they go with. I think that's a bit overpriced for something that's just an amplifier.

author: Martin72
author_rank: Super Contributor
timestamp: October 15, 2022, 12:49:02 pm
content: "Just" an amplifier..They´re a little bit more than just that, 1Mhz bandwith and full power are two things you can´t compare to the normal audio amps.But, as always, it can get a little bit cheaper:Aim-TTi WA301We got three of them at work, for CMOS circuits or driver circuits.Pros:-Cheap-30Vpp Outputlevel-50 and 600Ohms outputsCon:-No on/off switch

author: Kean
author_rank: Unknown
timestamp: October 15, 2022, 12:55:53 pm
content: Yeah, it isn't "just an amplifier".An alternative is the Juntek DPA-2698, which is what I have. No fancy PC control or integration with the function gen, but better specs in some respects.https://www.eevblog.com/forum/testgear/juntek-dpa-2698-10mhz-signal-amplifier-digilent-analog-discovery/

author: mawyatt
author_rank: Super Contributor
timestamp: October 15, 2022, 04:06:15 pm
content: Here's a few examples for DIY AWG Buffer Amps.https://www.eevblog.com/forum/testgear/awg-buffer-amp/msg3368650/#msg3368650https://www.eevblog.com/forum/testgear/hv-buffer-amp-for-awg/msg3623953/#msg3623953https://www.eevblog.com/forum/testgear/cheap-diy-high-powervoltage-awg-buffer-amp/msg3449784/#msg3449784We have the Juntek DPA-2698 & DPA-1698 and agree both are very good values for a AWG Buffer Amp.Best,
Tektronix TDS410A  - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: October 14, 2022, 11:54:09 pm
content: These things are rated at 200MHz yet only sample at 100MS/s.How the heck does that work? Imaginative interpolation?

author: AVGresponding
author_rank: Super Contributor
timestamp: October 15, 2022, 07:21:27 am
content: Equivalent Time (ET) sampling. Only really works on repetitive signals.

author: BillyO
author_rank: Super Contributor
timestamp: October 15, 2022, 02:32:05 pm
content: So useless for catching HF glitches but okay for waveform viewing.

author: alm
author_rank: Super Contributor
timestamp: October 15, 2022, 02:35:58 pm
content: I'd say good for single shot captures of signals with a bandwidth up to 25 MHz or so, but okay for normal mode triggering of repetitive signals up to 200 MHz.
Any Metrix MTX 3291 owners out there ? - Page 1
Forum section: electronics / testgear

author: shakalnokturn
author_rank: Super Contributor
timestamp: September 25, 2020, 01:01:23 pm
content: Anyone out here have one and willing to take a couple of photos of the PCB's ?I have a MTX 3290 and am pondering on the possibility to up-hack it.The main differences are 60k counts (vs. 6k) IR interface, backlight.A first check on the hardware shows that:LCD's are identical on both meters set aside the backlight panel.The 3290 has the IR interface and it is wired to the CPU.There is no separate serial EEPROM for calibration data but there is an unpopulated 24Cxx compaible footprint next to the CPU.Both the display/keypad and input PCB's have a set of three resistors that are typical of hardware configuration jumpers (can be soldered either to Vcc or to GND).

author: coromonadalix
author_rank: Super Contributor
timestamp: September 25, 2020, 02:22:37 pm
content: You have to compare the chipset used in them to see if you can add some functions ?? sometimes it could be a FW hack / modMetrix could have used proprietary ic's too ?Dismantle you meter, take photos, show them here, take note of all the chip markings etc ...And a 3291 owner will have to teardown his meter too .... try to make fw dumps etc ...

author: rdoursenaud
author_rank: Newbie
timestamp: September 26, 2022, 05:52:14 pm
content: I'm waiting for mine to come in a few days.I may take it apart and share photos if you're still interested.Feel free to ping me in a week or two if I forget.

author: rdoursenaud
author_rank: Newbie
timestamp: September 30, 2022, 10:02:22 am
content: Here you go :https://photos.app.goo.gl/55r7VLdqEakH3dbe7Hope you'll find what you're looking for.I didn't see anything obvious.The manual seem to state that the LCD are different though.

author: shakalnokturn
author_rank: Super Contributor
timestamp: October 12, 2022, 03:53:24 am
content: Thanks for going to the trouble of taking the hotos.I can't see any differences either, so will assume it's only programming.As for the LCD's I think they are the same physically just both models don't use all the same segments.
Keysight 34465A Boot Stopeed at End of First Screen - Page 1
Forum section: electronics / testgear

author: Mark Randol
author_rank: Newbie
timestamp: October 12, 2022, 08:08:26 pm
content: First time I've had a glitch with one of these, and we've had it awhile. Installed firmware is v2.14.Just got the instrument back from a local calibration house. It didn't just take a long time to boot, it stopped at the end of the first boot splash screen, after the progress bar had gotten all the way to the right (or almost, maybe a pixel or two left). Left it sit for several minutes. It was just stuck.Restarting, unplugging and re-plugging then restarting did not help. Boot still progressed to the same point and stopped. Asked Almighty Google. Nothing directly applicable, but AG did point to some ideas here which were close.What finally ?fixed? it was to unplug everything. Power, USB, network, everything. Press the power button. The meter 'tried' to turn on and immediately went dark, because *it isn't plugged in.* Duh!Plugged in the power and the meter started immediately. No power button press required. It passes all self tests and even accepted a FW update to whatever the latest and greatest flavor of firmware is.So what caused it? It has a computer in it. Enough said. If a WAG makes you feel better, I'm thinking retained power which allowed it to partially power on when unplugged, kept some corrupted junk in memory. Discharging the stored power cleared the garbage and allowed it to start properly. YMMV.Hope it helps if you are in a similar situation.Mark

author: wraper
author_rank: Unknown
timestamp: October 12, 2022, 08:15:40 pm
content: Unless it was made relatively recently, it has a very crappy MCU which is prone to data corruption in its FLASH.https://www.ti.com/lit/er/spmz861/spmz861.pdf?ts=1651046449928Look for different LM3MEM Errata to see how many different non fixable memory problems it has.
ISO Test analyzer - Page 1
Forum section: electronics / testgear

author: fant
author_rank: Contributor
timestamp: October 09, 2022, 04:30:46 pm
content: I have an HT M70 isotest.On the low ohm range the reading is changing reading by reading, with the probes shorted once it indicates 5,38 Ohm, the following 15,87 Ohm, the third 4,77 and so on.Changed the four relays inside ( they select the range and function ) but no improvement.Anybody has schematics or service manual.I have the user manual but no help.Thank you in advance

author: AVGresponding
author_rank: Super Contributor
timestamp: October 10, 2022, 04:00:04 pm
content: Have you tried swapping the leads? It's not unusual for them to go bad over time, even good quality silicone ones.

author: fant
author_rank: Contributor
timestamp: October 11, 2022, 10:16:38 pm
content: done everything is possible, changed terminals, cleaned the PCB with HPA, changed the relays, made some new soldering where solder is matt, checked some voltages, everything is OK, but it is not working.For this reason I need the schematics and/or service manual.Thanks in advance