hybridfree/eevblog-posts huggingface dataset:
DBT, under cabinet mount, 3d printed, box - Page 1
Forum section: electronics / testgear

author: TomB19
author_rank: Contributor
timestamp: November 03, 2021, 03:56:38 am
content: This is a 3d printable box which someone might appreciate having for a DBT. It's a trivial project but turned out kind of nicely.It's not UL approved so I present this for educational purposes.I've uploaded it to Thingiverse, including the source, if someone wants to see a parameterized FreeCAD project.I kept my DBT in a drawer for years. Not sure why it took me so long to knock this out.https://www.thingiverse.com/thing:5086765Kind regards to this community.

author: tautech
author_rank: Super Contributor
timestamp: November 03, 2021, 04:08:26 am
content: Nice.Suggest you also post about this Dim Bulb Tester housing in this sticky thread above:https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/

author: Dwaine
author_rank: Frequent Contributor
timestamp: November 03, 2021, 07:34:06 am
content: Here is my DBT....

author: tautech
author_rank: Super Contributor
timestamp: November 03, 2021, 07:38:56 am
content: Quote from: Dwaine on November 03, 2021, 07:34:06 amSwitching ?Mine I posted about in 2014....

author: rvalente
author_rank: Frequent Contributor
timestamp: November 03, 2021, 05:05:41 pm
content: Mates, what "DBT" stands for?

author: luma
author_rank: Regular Contributor
timestamp: November 03, 2021, 05:19:53 pm
content: Quote from: rvalente on November 03, 2021, 05:05:41 pm"Dim bulb tester",here's an articleexplaining what they are, why they are used, and how to build your own.

author: rvalente
author_rank: Frequent Contributor
timestamp: November 03, 2021, 05:34:00 pm
content: HA! In portuguese we just call it "series lamp", I use all the time while repairing SMPS and general power electronics.
HP4284 LCR meter, component value - Page 1
Forum section: electronics / testgear

author: S57UUU
author_rank: Regular Contributor
timestamp: November 03, 2021, 03:37:44 pm
content: Hello,my HP4284 produced some smoke and smell.As expected, there were some leaked electrolytic capacitors, but they also took another component with them, R214 on the A5 signal source board. It is burned to a crisp, can not even tell if it was really a resistor (and not some NTC or something). Measures about 6 ohms with an ohmmeter, in broiled state.I have the HP4284 service manual, but schematics and BOM is included only for the power supply.Please, if somebody has a better documentation, or maybe can look inside an HP4284, I just need to know the value of this component, to replace it.Marko CebokliSerial is 2940J05669A5 is HP 04284-66505
Does anyone have a service manual / schematics for Fluke 1662 - Page 1
Forum section: electronics / testgear

author: alexturner
author_rank: Contributor
timestamp: October 18, 2021, 11:23:49 pm
content: Hi there,A friend is asking for repair on a Fluke 1662 which is not powering on. A probe around internally would suggest an issue with one of the power supplies however, I've got no idea what's what without some documentation. Does anyone have access to a service manual?Alex

author: coromonadalix
author_rank: Super Contributor
timestamp: October 19, 2021, 12:55:33 am
content: Only a user manual is available, i dont think youll ever find a leaked oneUser manualhttps://www.manualslib.com/manual/1249594/Fluke-1662.html

author: langlv
author_rank: Contributor
timestamp: October 19, 2021, 07:16:37 pm
content: Not exactly the 1662 service manual, but for the 165x series. Hope that the power supply section is similar.http://webuser.unicas.it/misure/SEC/DISPENSE/Misure%20X%20collaudo%20Impianti%20elettrici/165X%20Service%20Information.pdf

author: alexturner
author_rank: Contributor
timestamp: November 03, 2021, 10:43:38 am
content: Thanks!!
Fluke T6-1000 PRO - Page 1
Forum section: electronics / testgear

author: PowerNet
author_rank: Regular Contributor
timestamp: June 28, 2021, 04:29:15 am
content: Hey, has anyone used the pro version just got released ?Also are all these metres made in china and ok to purchase from there online ? thought all Fluke MM are made in the USA.Thanks

author: Arhigos
author_rank: Regular Contributor
timestamp: June 28, 2021, 07:59:04 am
content: Yes, it's pretty good meter. It's not really that new. Newest meter with fieldsense technology is 378FC.All T6 PRO meters, as well as T5 and T6 are made in USA right now. (at least all meters for US market, not sure about Australia.)

author: PowerNet
author_rank: Regular Contributor
timestamp: June 28, 2021, 10:37:54 am
content: any idea where i can buy this USA made one and shipped to Australia ?

author: Arhigos
author_rank: Regular Contributor
timestamp: June 28, 2021, 11:38:25 am
content: Is all meters in Australia are made in China? Have you checked with your local distributor first? If answer is Yes to both questions, then you can probably use package-forwarding companies for that.Just keep in mind that for different countries meters can be sold with different type of test leads. For example US meters are having flat test leads because power outlet socket is flat (Australian can be round, but i'm not 100% sure)

author: AVGresponding
author_rank: Super Contributor
timestamp: June 28, 2021, 03:53:03 pm
content: The probe tips attach to the leads using standard 4mm shrouded plugs/sockets, so that shouldn't be a problem.Sorry I can't help with an Aussie supplier though.

author: colourlessgreenideas
author_rank: Newbie
timestamp: November 04, 2021, 04:57:59 am
content: Grey market meters work just fine, they're the same meter, but bear in mind that if it's not purchased from an Australian distributor, Fluke Australia will not honour the warranty if it breaks. They'll tell you to send it to the country you purchased from.
SDS 1104X-E increasing number of frames in history - Page 1
Forum section: electronics / testgear

author: dige
author_rank: Contributor
timestamp: November 02, 2021, 07:56:36 pm
content: I am working with 1MHz SPI with 1-12 bytes per transfer. I need to capture 50-100 SPI frames. I went to acquire mode and and set the mem depth to the lowest number to capture max frames. There are about 50 SPI transactions happening but only 9 frames are being captured. Why is this? I also increased the max segments in sequence mode to 500, but it is not changing the frame capture.Thanks

author: tautech
author_rank: Super Contributor
timestamp: November 02, 2021, 08:49:15 pm
content: Been hunting for History examples but not found any as yet however there are other ways of skinning this cat.Capture slow and zoom in then Pan through the capture using H Pos control or scroll through the Decode table with the Multipurpose control.Old image by rf-loop from another thread:
Looking for a low end DC load with low noise ripple current  - Page 1
Forum section: electronics / testgear

author: trp806mo
author_rank: Regular Contributor
timestamp: November 03, 2021, 02:04:02 pm
content: Hi following some measures done with a Siglent SDL1000 (i updated the dedicated topic with the results), i tried to find a DC load which costs less than 600 USD with a maximum ripple noise current of around 1% below 5A/35VI'm thinking more on some Korad, BK, ET5410 brands/model than at some chroma, kikusui, Prodifit, Array (?) which should fulfill my request but not for those bucks.Do you have some idea ?

author: Andrew_Debbie
author_rank: Frequent Contributor
timestamp: November 03, 2021, 03:00:33 pm
content: Depending on what you need, youmightbe able to use an ancient HP 62xx linear power supply as a load.There is a section in the user manual showing how to configure the supply todischargea battery at constant current.I've never done this. I just noticed it in the manual.https://www.mikrocontroller.net/attachment/349650/hp6264.pdfSee page 3-15.

author: trp806mo
author_rank: Regular Contributor
timestamp: November 03, 2021, 05:41:21 pm
content: Yes it could be interesting as I need only one external resistor. I will check old SMU references from Keithley too as they are four-quadrant.
Test equipment and educational discounts? - Page 1
Forum section: electronics / testgear

author: ixfd64
author_rank: Frequent Contributor
timestamp: November 02, 2021, 12:02:59 am
content: From looking at catalogs, some companies sell test equipment at deep discounts with the stipulation that it cannot be used for commercial purposes. However, my understanding is that this is not legally enforceable due to the first-sale doctrine. I asked about this a long time ago, and someone mentioned that this would be an EULA violation rather than a legal matter. But even in that case, the law trumps EULAs. You generally can't get sued for violating a company's terms of service.So are there any legal consequences for using such equipment commercially? Or am I correct to assume that the worst thing that could happen is that the company refuses to continue to do business with you?

author: ataradov
author_rank: Super Contributor
timestamp: November 02, 2021, 12:42:09 am
content: Usually you need to provide a proof that you belong to an educational institution. You will either need to register with .edu domain or provide a letter on the school letterhead.Educational versions are also often limited in features.I have not seen anything that could be easily bought at a discount without jumping though some hoops.Also, software EULAs are enforceable, but I doubt anyone will bother unless you are doing some grey market reselling in mass quantities.

author: bob91343
author_rank: Super Contributor
timestamp: November 02, 2021, 04:32:20 am
content: It's possible that the criterion is whether the company is losing important money due to 'improper' use, and whether they feel their reputation is on the line, such as being pressured to give similar discounts to your competitors.
Newly calibrated LC102 or LC103 owner, need help for calibration parts - Page 1
Forum section: electronics / testgear

author: liys
author_rank: Newbie
timestamp: October 31, 2021, 10:36:25 am
content: Hi new member here from Indonesia, just bought a LC102 from ebay, price was ok, in working condition but unknown calibration state. Short test fail at the beginning, but the short relay was easily opened, but the cleaning wasn't an easy one. Tried contact cleaner, alcohol, nail polish, nothing works, at the end I had to sand the relay contact with #1000 sanding paper which is only then it pass the test. Tested lots of caps, no problem, only I don't know if it's accurate or not. I think really need to calibrate it and so here I am needing the calibration parts, as those parts that comes with 0.25%, 5% and others are not available at mouser, time or even aliexpres. Any of you guys here who has a newly calibrated LC102 or 103 from a known professional calibration company or probably parts measured from a known good calibrated meters, want to sell a set of calibration parts for LC102 owners? I'm sure others will find them useful too. Please let me know, thank you so much.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2021, 12:57:57 pm
content: have you began some checks with this sheet --- attached documentsome documents here :https://bama.edebris.com/manuals/sencore/lc102/or i have uploaded them there : KO4BB websiteand a thread there :https://antiqueradios.com/forums/viewtopic.php?f=8&t=368687&start=20There's some thread here too, a simple search would provide you the same posted links i've madephrase taken from antique radioThe LC102 is easier to calibrate on capacitance compared to the older units like LC53, LC75, and LC101. You only need two capacitors for calibration (1500pF and 1.2uF). With the LC103, you need a special rig setup...

author: liys
author_rank: Newbie
timestamp: October 31, 2021, 04:27:55 pm
content: Thank you for the reply, yes I've seen those docs at bama and download and read some even before I get my LC102 and that calibration procedure from sencoretech as well.No problem with my unit, the error on short test has been fixed. My only need right now is the precision caps needed to calibrate it. The procedures call for some super low tolerance parts, here is where the problem is, I couldn't find them. I figure, if I can get those parts from anyone who has a professionally calibrated lc102/LC103, as long as I can dial the value matches the value shown on the calibrated unit, mine would probably be as accurate as his, ok maybe a bit less
GW Instek GFG 8020H Schematic - Page 1
Forum section: electronics / testgear

author: GerryR
author_rank: Frequent Contributor
timestamp: October 29, 2021, 11:20:15 pm
content: I'm looking for a schematic for the GW Instek GFG 8020H function generator, older analog model. I have the user manual, which has some trouble-shooting info but really need to get a schematic. Searched online to no avail. Any help would be appreciated. Thanks in advance.

author: GerryR
author_rank: Frequent Contributor
timestamp: October 30, 2021, 10:52:02 pm
content: Anybody; any help here? Thanks in advance.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2021, 03:47:47 am
content: May help ? the 8020G model ...https://elektrotanya.com/gw_gfg-8020g_function_generator_sch.pdf/download.html#dl

author: GerryR
author_rank: Frequent Contributor
timestamp: October 31, 2021, 11:28:08 am
content: Quote from: coromonadalix on October 31, 2021, 03:47:47 amThank you! Big help!
Fake HAKKO FX951 ? - Page 1
Forum section: electronics / testgear

author: ABSTA
author_rank: Contributor
timestamp: November 01, 2021, 01:03:41 pm
content: Hey i found this second-hand Hakko station in a popular european webmarket,can you confirm that this used Hakko fx951 isn't a genuine one?there are some elements like the iron stand,the iron plug can put down some doubts.Can you help me please?

author: ryanscott6
author_rank: Contributor
timestamp: November 01, 2021, 02:55:50 pm
content: The font text looks a bit iffy but otherwise it matches the one I have here. Would probably need to crack it open and look inside.

author: wraper
author_rank: Unknown
timestamp: November 01, 2021, 03:08:26 pm
content: The most obvious sign of counterfeits is no jack for standby wire on the back of station and stand. Another sign is a sticker with model and serial number. In this one a handpiece and a stand look dodgy as hell.

author: Old Printer
author_rank: Frequent Contributor
timestamp: November 01, 2021, 03:28:29 pm
content: The colors look very bright, possibly too much so. I read several articles while researching my purchase of a new FX888D. One in particular showed a legit model alongside a fake, both completely disassembled, and it was tough to tell except by some tiny details. It was enough to make me be sure I bought from an authorized dealer and not a reseller. Even some of the counterfeit prices in the articles were close to legit pricing. I was concerned about having the factory warranty, but it turned out that was only 90 days, pretty pitiful from a major company like Hakko. Warranty for Weller is one year, but I still like my Hakko.

author: AVGresponding
author_rank: Super Contributor
timestamp: November 01, 2021, 05:21:41 pm
content: This is a pic of a genuine one from the Hakko UK website:

author: DaJMasta
author_rank: Super Contributor
timestamp: November 01, 2021, 06:04:54 pm
content: The blue is a little darker than mine, and the pencil definitely is not the FM-2027 that came with mine, but I don't see anything else obvious - higher resolution pics or pics of parts you think look iffy could be better for that.I don't have a stand like yours with mine, though, mine matches the image in the post above with less wire and higher sides.
Gossen METRA HIT 27I - resistance measurement not working - Page 1
Forum section: electronics / testgear

author: nr6
author_rank: Newbie
timestamp: October 30, 2021, 04:31:52 pm
content: Dear community,i'm struggeling to get one of our Gossen METRA HIT 27I running again after the fuse had blown.Several measurements are not working properly:- Voltage DC: ok- Voltage AC: ok- mOhm @1A: always shows 114mOhm- mOhm: always shows 116mOhm- Ohm: always 0- °C (Pt100): O.L. (wether there are 110Ohm attached or not)- Insulations resistance (50-500V): always showing 450MOhmI replaced the fuse. For testing purposes i replaced it with an 250V,F2A fuse instead of an 1000V,FF1.6A fuse. (Cause I don't have a 1000V,FF1.6A in my lab). The blown fuse left a metal coating an some parts which I scrubbed off. In comparison to an original fuse (ceramic housing) the blown one had a glass housing. The resistance measurement is not affected wether there is fuse installed or not.I was searching for any service manual or schematic that could help to solve the problem. But there seems to be nothing available. Does anybody of you have a clue of what might get the DMM running properly again or any documents like schematics or service manuals?Thank you very much for your help!

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2021, 03:42:34 am
content: Sorry to say you'll never find a service manual for theses meters closed guarded secrets .... same for 28 29 models too
Megger AVO410 - Page 1
Forum section: electronics / testgear

author: Dr_Smoke
author_rank: Newbie
timestamp: October 30, 2021, 04:23:51 pm
content: hello good afternoon, I am new to the forum, I write because I have a broken avo410 megger and I do not get the scheme anywhere, I have also been able to find out that this model is remarked by appa73. The multimeter fails in the measurement of diodes and resistance always giving 0 and beeping, when I remove the autorange it works well. Can anyone try to help me repair it? Thanks a lot.
Tektronix TDS3034B - Page 1
Forum section: electronics / testgear

author: hitecelec
author_rank: Regular Contributor
timestamp: January 18, 2019, 06:35:11 am
content: Hi AllI wanted to know if the Tek TDS3034B will power on without the battery.if not is there a method to bypass the battery and make the unit functional on mainsThanks in advanceRegardsAnand

author: Hydrawerk
author_rank: Super Contributor
timestamp: January 18, 2019, 06:20:55 pm
content: You might need a TDS3000B Series User Manual Manual.https://www.tek.com/oscilloscope/tds3014b-manual/tds3000b-series-user-manual

author: MarkL
author_rank: Unknown
timestamp: January 18, 2019, 06:33:51 pm
content: You do not need the battery.

author: hitecelec
author_rank: Regular Contributor
timestamp: January 21, 2019, 04:39:54 am
content: thank you

author: texaspyro
author_rank: Super Contributor
timestamp: January 21, 2019, 04:56:30 am
content: BTW, if your unit has a TDS3BATB, that battery has been recalled by Tektronix. They will replace it for free (normal cost is like $750-$1000!). I bought a very nice used TDS3024 a few months ago for cheap because the dead battery was giving a rather misleading warning on boot up. I pulled the battery and the warning went away. Then I looked into replacing (super expensive) or rebuilding the battery pack and found out about the recall.Tek paperwork said to ship the old battery back to them, two day air, at their expense. That would be illegal, so I paid the local UPS store around $40 to pack and ship it to them properly.

author: hitecelec
author_rank: Regular Contributor
timestamp: February 27, 2019, 06:07:34 am
content: I have 2 nos of TDS3034B. Both had a defective power supplyI managed to repair one of the power supplies ie artesyn NAN40-7615-01. and is working ok.However in the other unit the optocoupler IC A1- TCDT1103G( there ia a triangle logo). that was defective. I ordered a new 782-tcdt1103G from Mouser and replaced the IC . the power supply switches on but gives only 2 V dc. I tried another 782-tcdt1103G still same result.Strangely I pulled out IC A1 - TCDT1103G from the working unit and replaced it in the defective unit. bingo it started working. As someone had posted in this forum tried by replacing CNYF17-03 too still does not work. How do i source the Original opto coupler ICRegardsAnand

author: Simon
author_rank: Unknown
timestamp: March 02, 2019, 08:34:27 am
content: Please can you stop double (triple) posting, it is very annoying and ultimately will get you banned.

author: hitecelec
author_rank: Regular Contributor
timestamp: March 02, 2019, 12:00:05 pm
content: helloSorry . will take care in future. BY oversight posted in Repairs tooRegardsAnand

author: Dave Wise
author_rank: Regular Contributor
timestamp: October 30, 2021, 09:49:04 pm
content: Quote from: texaspyro on January 21, 2019, 04:56:30 amI tried to exchange my TDS3BATB and the guy said they can't ship them in Oregon. I think they're giving me the brush-off.
Solartron 7081 Battery Question - Page 1
Forum section: electronics / testgear

author: essele
author_rank: Frequent Contributor
timestamp: October 30, 2021, 10:30:16 am
content: Hi,I've just started looking at a Solartron 7081 that I bought for repair ... it has an NVM FAIL error, which is not suprising given the ER3400 is completely missing!But while I wait for a new(ish) one to arrive I've been looking at other issues ... and I'm a bit confused about the battery situation.The battery on the lower board is a 3.6V lithium inorganic battery which is completely dead ... I'm assuming I can just replace this with another 3.6V lithium battery, something like this:https://uk.farnell.com/eve/er14250p/battery-lithium-1-2aa-3-6v-axial/dp/1365936The battery on the IO Board is the one that's confusing me ... in a number of the forum posts about the 7081 this is talked about as a Ni-Cd and is indeed shown on the schematic as a 3.6V NiCAD with what looks like a charging circuit.At least one person has replaced this with a supercap, which I understand ... however, both in my device and in a number of post in the forum this has been replaced by a lithium battery ... in my case an RS 593-473, these are not rechargeable!Surely this is a problem?Wouldn't I be better off with one of these?https://cpc.farnell.com/varta/55615603940/battery-ni-mh-mempac-pcb-3-6v/dp/BT00152?ost=bt00152

author: justanothername
author_rank: Regular Contributor
timestamp: October 30, 2021, 12:10:16 pm
content: It has a charging circuit, so the normal way would be to change to a supercap or a NiMh battery.Since it does trickle charging it is not that critical to use NiMh instead of NiCd. If you want to be safe, change R403 to 1k or higher.However you can use a primary cell (Li-SOCl2 - the have a large capacity). Then you may want disable the charging circuit. The easiest way would be to desolder R403.
'scope out of sync with waveform until Auto button pushed - Page 1
Forum section: electronics / testgear

author: carl0s
author_rank: Unknown
timestamp: October 29, 2021, 12:21:03 pm
content: I'm sure this has been asked/answered before.what am I doing wrong, when a sine wave is just racing across the screen on a DSO and the only way I can find to get things 'normal' is via the auto button?On the SDS2104X Plus I just had that going on, and at the same time, it would only let me set the timebase between 100ns and 10ns. I pressed Auto Setup and it sorted it, but I'd like to know what I'm doing wrong.Vertical looked OK, horizontal was nuts.I'm sure I have the same PEBCAK issue with my Rigol too..thanks

author: carl0s
author_rank: Unknown
timestamp: October 29, 2021, 12:23:40 pm
content: oh, I've got it.I had set the trigger to Serial..it's the trigger that I need to start paying attention to. I always thought that was just to capture a single event.

author: tautech
author_rank: Super Contributor
timestamp: October 29, 2021, 07:31:56 pm
content: Quote from: carl0s on October 29, 2021, 12:21:03 pmTo get stable triggering on a data packet you need to disable retriggering by setting trigger Holdoff to a period longer than the packet. Hit Stop and eyeball graticules to get a packet length measurement, add a little for the few packets that might be longer and in the Trigger menu adjust Holdoff to this measurement.For X Plus click or touch the Holdoff measurement box to bring up the virtual keypad and input the new settings then hit Enter.Since data packets are usually active Low also change the trigger to Falling to have it trigger on the earliest packet activity (first falling edge) and you should now have rock solid packet triggering without needing a Serial trigger and Decode will now make sense.Serial triggering is only needed if needing to trigger on a specific bit.Tips for X PlusDisplay> Menu Autohide = OFF. Now you always have a specific menu up but can hide it in an instant with a click or touch of a vacant area of the display.Grab screenshots to USB using the blue Print button and post them here if you need further guidance.Use of a mouse improves workflow.Like with any DSO mastering the trigger and its capabilities will give the results you need. Driving the rest of the scope is easy but so are basic triggers. Triggers are your most powerful tool.
ISO HP 3582A Spectrum Analyzer processor board 03582-66507 - Page 1
Forum section: electronics / testgear

author: bristpi176
author_rank: Contributor
timestamp: October 29, 2021, 06:27:12 pm
content: Good afternoon folks,I'm in need of a good working processor board for an HP 3582A spectrum analyzer. I can trade the bad one to someone who can fix it as well. Fixing mine is likely beyond my capability and I'd hate to ruin one that could be fixed. They aren't growing on trees, you know.Background: I played boardy swappy with two of these instruments to narrow down the fault in the one that wouldn't work, so I have one that works and one that will work with a new processor board. I'm hoping to get another working unit back into circulation.Thanks for any help you can provide.
SPI decode SDS1104X-E MOSI decode shifted left by 1 bit - Page 1
Forum section: electronics / testgear

author: dige
author_rank: Contributor
timestamp: October 29, 2021, 12:44:24 pm
content: Hi,I have the SPI serial trigger on the Siglent scope set to the MOSI. The data length is 8 bits, bit order MSB. CLK is falling edge, all thresholds set to 1.6V. I am not sure what to set the MOSI trigger byte to. I have tried don't care, all 0's. I don't understand why the MOSI signal is decoding as 0x40 instead of 0x20. MISO signals are being decoded correctly. The slave is SPI mode 0.Thanks,Priya

author: Kean
author_rank: Unknown
timestamp: October 29, 2021, 04:18:36 pm
content: In mode 0 the SPI controller changes its data output on the falling edge of the clock and holds it for one clock cycle, as you can see in your scope shot. On the SPI peripheral side you should sample the data input on the rising edge.See description of CPHA athttps://en.wikipedia.org/wiki/Serial_Peripheral_Interface#Clock_polarity_and_phase
Can a Feeltech Fy6900 signal generator do this?  - Page 1
Forum section: electronics / testgear

author: ballen
author_rank: Regular Contributor
timestamp: October 29, 2021, 12:38:20 pm
content: I have a Feeltech Fy6900 signal generator, and would like to know if I can program it to do the following:On channel 1, output 20,000 square wave cycles at 10kHzOn channel 2, output an identical signal, phase shifted by 90 degrees with respect to channel 1It's easy enough to program the signal generator to produce continuous square waves, offset by 90 degrees between the two channels. But is there a way to use the modulation function (without an external counter or time standard) to output a certain number of cycles? Or some other "internal" way to program this?

author: xrunner
author_rank: Super Contributor
timestamp: October 29, 2021, 12:57:11 pm
content: Quote from: ballen on October 29, 2021, 12:38:20 pmShould be called "Burst". Looking at the specs of that model, it appears that it can do bursts -Quote
Link Instruments - Page 1
Forum section: electronics / testgear

author: jmelson
author_rank: Super Contributor
timestamp: October 30, 2021, 04:01:20 pm
content: I have a Link Instruments DSO-2100 (2 channel 100 Msa/sec) digital scope that as far as I know still works. But, I need the program to make it run. Link doesn't seem to have any programs that will run this scope on any newer OS than Windows 3.1, as far as I can tell. Does anyone know if there is a program that will run it on a newer OS (or preferably Linux)? Note that another manufacturer makes a DSO-2100, but it is a USB device.Thanks in advance for any hints.Jon

author: bdunham7
author_rank: Super Contributor
timestamp: October 30, 2021, 04:24:25 pm
content: https://linkinstruments.com/wdso21_2k.exeIs that not it?

author: RoGeorge
author_rank: Super Contributor
timestamp: October 30, 2021, 09:30:07 pm
content: I doubt USB was a thing during Windows 3.1, but you can try making a virtual machine with win3.11 on whatever OS you may have now, maybe one with win98, too, and so on until you find the most recent windows that still runs that software.

author: 2N3055
author_rank: Super Contributor
timestamp: October 30, 2021, 10:47:20 pm
content: That is an old scope that works with parallel port if I remember correctly...

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2021, 03:50:29 am
content: Like this ?https://www.ebay.com/itm/LINK-INSTRUMENTS-MODEL-DS0-2102M-DSO-2100-PC-BASED-DIGITAL-STORAGE-OSCILLOSCOPE-/401764675092Some Infoshttps://web.archive.org/web/20010803015816/http://www.linkinstruments.com/oscilloscope21.htmor this one ?https://sigrok.org/wiki/Hung-Chang_DSO-2100
Fluke 345 cklicking noise inside, flikering white screen and no boot!! - Page 1
Forum section: electronics / testgear

author: xXxzZz
author_rank: Newbie
timestamp: October 29, 2021, 10:58:01 am
content: Hello everybody !!My fluke 345 has clicking noise, white screen flickering in line with clicking, and does not boot.It appears properly in pc devise manager. Firmware upgrade tool recognizes the com port, activates the boot mode, clicking and flickering stops, but the screen remains white which MUST be black!!!When working, It has 4.0.0 firmware. But the latest firmware version on the Fluke website is 3.0.2.Any ideas are welcome!Please excuse me if any inconveniences from my side.Regards.
Looking for an owner of Tek 4000 series, to test software - Page 1
Forum section: electronics / testgear

author: luis garcia
author_rank: Regular Contributor
timestamp: October 28, 2021, 11:30:23 pm
content: hi,I would like to have remote Network access to a Tek 4000, series DPO, MSO or MDO. Any model would be valuable for my tests. So far I have tested the software with 3000 series.All i need is about one hour access by TCPIP to your instrument. You can monitor my access if you want. I would not perform any action that may put at risk your information and i wont change your configuration. You may save your last setup for your convenience if you want. You can break the access at any time without giving any explanation.I am not reading any internal data or serial numbers. I am going to send just plain common commands to read normal configuration and waveforms. I dont need anything connected to your instrument. In the case the communication with the instrument breaks I might request you to turn the instrument off and on.I am not interested on newest MSO4, just the old MDO, MSO and DPO.I will reward your collaboration with 100USD on your Paypal account, provided I can complete the full test without interrupts.Interested people please leave me a private mail.L.
Hitachi V-152 Oscilloscope - how to discharge the CRT? - Page 1
Forum section: electronics / testgear

author: sad123
author_rank: Newbie
timestamp: October 23, 2021, 02:25:55 am
content: I couldn't get an answer in the repair section, so maybe someone here knows?I got an older Hitachi V-152 oscilloscope that needs a few issues sorted.Before I can do this, does anyone have the procedure to discharge the CRTs in these ones? They don't have an anode cap on top like TVs, or a separate connection like a tektronix.Also, does anyone have the service manual for this model (V-152 not V152F).Images of the innards:

author: tautech
author_rank: Super Contributor
timestamp: October 23, 2021, 04:37:01 am
content: Old LF CRO's usually didn't have PDA treblers/quadruplers to store a good belt for the unexpecting so just good safe practice around the PSU and EHT stepup (if it has one) will keep you safe. You could if you're nervous cobble together a cap discharge lead of say 100 ohms if a poke around with a DMM shows any stored voltages after it's been OFF for a few minutes.After some familiarity you will get to know where charges are stored and head there first to make it safe to work on.Just be wary of the EHT as they're generally 1KV or more.

author: MathWizard
author_rank: Super Contributor
timestamp: October 28, 2021, 12:35:10 am
content: Out of curiosity, what happens if you connect a typical filament light bulb to +1kV ?? Will it just burnout like a fuse ? A 100nF cap at 1000V is only 50mJ thoughWhat about a stove-top heating element ?Some people just use a screwdriver, it better be well insulated !!

author: bdunham7
author_rank: Super Contributor
timestamp: October 28, 2021, 12:43:43 am
content: It doesn't have post-deflection acceleration, so there's no HV anode to discharge. It should discharge itself as soon as you turn in it off, but you can poke all the CRT pins at the back with a grounded probe if you like.

author: tautech
author_rank: Super Contributor
timestamp: October 28, 2021, 12:48:41 am
content: The OP is now much further down the track in this Repair board thread:https://www.eevblog.com/forum/repair/hitachi-v-152-oscilloscope-how-to-discharge-the-crt/msg3763652/#msg3763652

author: sad123
author_rank: Newbie
timestamp: October 28, 2021, 04:21:52 am
content: Yes, thank you for that. This matter is now sorted and the thread can be closed.I'll open an new one for a couple of issues with the scope.

author: james_s
author_rank: Super Contributor
timestamp: October 28, 2021, 06:11:12 am
content: Quote from: MathWizard on October 28, 2021, 12:35:10 amIt's all down to the amount of energy available. The HV from a typical CRT is not even going to make the bulb flash. The bulk filter capacitor in a SMPS will make a flash of light. A suitcase sized capacitor charged up to 15kV will likely make the bulb explode.
LeCroy 434, but running WM8400 firmware? Puzzled  - Page 1
Forum section: electronics / testgear

author: aqibi2000
author_rank: Regular Contributor
timestamp: July 22, 2021, 05:11:57 pm
content: Hi,Got an eBay snipe for a LeCroy 434, but looking at the firmware it appears to be from another model.Can anyone shine some light onto this. Aspirations are to perform I2C/SPI/UART/CAN decoding.Thanks

author: ollopa
author_rank: Regular Contributor
timestamp: October 28, 2021, 04:47:04 am
content: LeCroy XStream scope (Windows scopes) all use the same firmware and detect the instrument type from the acquisition hardware. Your first screenshot shows simulated square, triangle, sine, and pulse waveforms leading me to believe the instrument is in simulation mode. Either someone has gone into the service menu and checked the sim option or there's a hardware issue talking to the acquisition board and it has fallen back to simulation mode.Inside you'll find a PCI acquisition interface card like the picture I've inserted. It's probably fine but may be having trouble talking to the board it's connected to.
USB cable tester - Page 1
Forum section: electronics / testgear

author: artag
author_rank: Super Contributor
timestamp: October 26, 2021, 10:44:14 am
content: Does anyone know of a USB cable tester that can test more than the minimum power and data pins ?I can find multiple network testers with a USB option, but it's usually just type A and B connectors - no USB3, C, mini, micro etc.I can also find a single chinese tester that does have most of the options but only appears to measure the main 4 pins.I'd like to be able to quickly distinguish power/data and power-only USB 2 cables, OTG host cables, USB 3 fast data path, and type C wiring such as reverse-pinning and PD.

author: RolandK
author_rank: Regular Contributor
timestamp: October 26, 2021, 02:56:22 pm
content: I have this one:https://www.tindie.com/products/aroerina2/usb-cable-checker/#specsIt is no more available, but the design files are there.I added a test for the connection of the shield, as for many cheep cables there is no shield. Eg. a USB 3.0 Cable for SSD Disks made a fritzbox send to much WLAN Signal over the USB Cable. It is described in the reviews.

author: Kean
author_rank: Unknown
timestamp: October 26, 2021, 05:07:13 pm
content: I was looking at this one the other dayhttps://www.instructables.com/Touch-Screen-Cable-Tracer/https://www.tindie.com/products/techkiwigadgets/touch-screen-cable-tracer/

author: 1audio
author_rank: Frequent Contributor
timestamp: October 28, 2021, 03:34:03 am
content: if you need to test the latest USB 3 and USB-C cables you need something like this:https://www.totalphase.com/media/datasheet/TP_Advanced_Cable_Tester_v2-Datasheet.pdfSerious overkill to check basic functions but important if your cable needs to deliver 100W+.
Hantek DSO5072P Hangs in Self-Cal - Page 1
Forum section: electronics / testgear

author: K6YF
author_rank: Newbie
timestamp: October 28, 2021, 12:39:09 am
content: My 5072 DSO is hanging up at step 12/38 during self-calibration mode. Halp!Tnx es 73Robert K6YF
HP 85712B EMC Measurement personality card - Page 1
Forum section: electronics / testgear

author: MagicSmokeGuy
author_rank: Contributor
timestamp: September 03, 2021, 05:18:20 pm
content: Just wondering if anybody knows where I can lay my hands on the manual for this card which is used with the HP859x range of SA?It adds the ability to do EMC measurements which I may find useful if I know a little more about what it's capable of.

author: langlv
author_rank: Contributor
timestamp: October 20, 2021, 05:37:22 am
content: Not the 85712B, but a 85712D manual. Should be very similar.enjoy,Lang

author: MagicSmokeGuy
author_rank: Contributor
timestamp: October 27, 2021, 11:44:24 pm
content: Thanks Lang.Very useful and much appreciated.Brian
Basic USB-C Load (sink) - Page 1
Forum section: electronics / testgear

author: dav888
author_rank: Regular Contributor
timestamp: October 27, 2021, 07:37:40 pm
content: Looking for the most basic USB-C sink, similar to these, but even more basichttp://avhzy.comorhttps://www.amazon.com/DROK-Electronic-Adjustable-Intelligent-Temperature/dp/B07FL3PS57just need something that presents itself as a sink (over PD) and applies a loadcontrollable over gpio/uart/usbpreferably open source (schematic)

author: Kean
author_rank: Unknown
timestamp: October 27, 2021, 11:25:20 pm
content: Do you already have a general purpose programmable DC load? If not, it is worth getting one, or even building one.Then you just need a USB C PD decoy trigger module that suits your voltage/power rating.
Suggest LiPo battery capacity tester - like Opus BT-C3100 for 18650 (or DIY) - Page 1
Forum section: electronics / testgear

author: amra_san
author_rank: Newbie
timestamp: October 27, 2021, 11:18:52 am
content: WhatSearching for capacity tester for LiPo batteries, which runs full cycle (charge, discharge, charge) and displays accurate battery capacity.I am looking for same features as Opus BT-C3100, which I use for 18650 batteries (https://www.amazon.com/Opus-BT-Intelligent-Compatible-Batteries/dp/B01852TBOU).WhyI salvage notebook batteries. 18650 are not used anymore and I need a tool to measure Li-ion Polymer cells.I prefer afinishedproduct, but you cansuggest DIY solutions.

author: HKJ
author_rank: Super Contributor
timestamp: October 27, 2021, 11:45:17 am
content: Nearly any electronic load can be used, optionally connected to a computer that can record a discharge curve.The only DIY part is making a connector that fit the battery.

author: BradC
author_rank: Super Contributor
timestamp: October 27, 2021, 03:47:10 pm
content: I use an IMAX B6 and B8. Multiple cycles, logs out a serial port.

author: JimKnopf
author_rank: Frequent Contributor
timestamp: October 27, 2021, 08:00:33 pm
content: I bought this EBL Universal charger recently for single cell batterys. Very nice device. You can log on PC. I build an adapter to connect phone batterys.For multiple cell batterys i use an iMax B6 too.
Microplot 50A user manual? - Page 1
Forum section: electronics / testgear

author: mightyohm
author_rank: Regular Contributor
timestamp: October 15, 2021, 08:06:31 pm
content: Hello all,I have an Intelligent Interfaces Microplot 50A HPIB to Parallel converter but it is missing the power supply and the manual. Does anyone have a PDF copy of the manual so that I can learn how to configure and use this interface?

author: edpalmer42
author_rank: Super Contributor
timestamp: October 15, 2021, 11:19:40 pm
content: https://web.archive.org/web/20021207135950/http://www.intelligentinterfaces.com/manuals/MICROPLOT_50A.htmlNot a pdf, but looks like all the info is there.Ed

author: mightyohm
author_rank: Regular Contributor
timestamp: October 26, 2021, 09:54:44 pm
content: Ed, That's exactly what I was looking for, thank you very much!!
Reading LA data from DS1074Z Plus via SCPI - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: May 27, 2021, 09:38:57 am
content: Good morning (o;Trying to read out the waveform data from my DS1074Z Plus via SCPI with a telnet connection.....and according to the SCPI manual it should work like this:Code::STOP:WAV:SOUR D0:WAV:STAR 1:WAV:STOP 100:WAV:DATA?But all I get is:Code::WAV:DATA?#9000001000Any idea why only the header is returned?Or is a telnet SCPI connection useless for this?Goal is to reconstruct a screenshot of all available analog and digital channels like DSRemote is doing, but that software doesn't support LA channels.thansk in advancerichard

author: davorin
author_rank: Unknown
timestamp: May 27, 2021, 10:04:01 am
content: Indeed SCPI vial telnet is useless...it strips off anything non-ASCII....lxi-gui fromhttps://github.com/lxi-tools/lxi-toolsworks fine though:

author: davorin
author_rank: Unknown
timestamp: May 27, 2021, 02:38:16 pm
content: Some first simple results with pyqtgraph reading digital and analog channels from my DS1104Z Plus (formerly known as DS1074Z Plus ;o):

author: davorin
author_rank: Unknown
timestamp: May 29, 2021, 09:13:27 am
content: Okay...found an example how to calculate the voltage from BYTE waveform readings in the MSO2000A SCPI manual...Looks better now...just need to find a way to get rid of the axis grids outside of the measurement area in pyqtgraph (o;

author: RoGeorge
author_rank: Super Contributor
timestamp: October 26, 2021, 03:26:19 pm
content: Quote from: davorin on May 27, 2021, 09:38:57 amThe response format is described in the "DS1000Z_Programming Guide_EN.pdf" manual of the DS1000z from Rigol.https://www.rigolna.com/products/digital-oscilloscopes/1000z/There are many tools already, I think DS1074z is alsoSIGROKcompatible, but I don't know if that will use the logic analyzer or the analog data.https://sigrok.org/wiki/Rigol_DS1000Z_seriesA screen capture can be downloaded without any driver or additional software, i.e.Code:echo ":DISPLAY:DATA? ON,OFF,PNG" | nc -w1 192.168.32.208 5555 | dd bs=1 skip=11 of=image.pnghttps://hackaday.io/project/6857-master-your-rigol-from-command-line

author: davorin
author_rank: Unknown
timestamp: October 26, 2021, 03:48:12 pm
content: Reminds me to further enhance my python code....At least looks better than before:https://raw.githubusercontent.com/richardklingler/rigol/main/images/ds1104zplus.png
Tektronix 2710 Display Failure "Dots" = Rigol DSA815 Non TG Replacemnt. - Page 1
Forum section: electronics / testgear

author: KG7AMV
author_rank: Frequent Contributor
timestamp: October 21, 2021, 12:47:37 am
content: Sadly after nearly 2 decades or a little more that i have had it the Tektronix 2710 has given up..I researched the issue and not really worth my time to fix.This Rigol DSA815 Non TG (Just a Black Plug) This Appeared locally on the classifieds. The price was really good so I snapped it up fast it still have 35 Hours on the trials. To bad but it is boot 01.04 I guess other than bridging pins the trial will eventually expire from what I read.I wanted a Siglent SSA3021X Plus But Was Not in the Budget at the Moment And Missed the Labor Day Amazon Deal and Nothing scheduled for Black Friday.So Sadly the Spectrum Analyzer will still be the odd one out in the Siglent Based Lab.

author: K5HJ
author_rank: Regular Contributor
timestamp: October 26, 2021, 05:06:47 am
content: You sure that's a non-TG DSA8515? I thought they had a blank plug covering the RF output connector hole. The one in the photo has an N connector with a protective boot on it. They originally ship with those boots on both connectors.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: October 26, 2021, 06:44:16 am
content: Yea, was missing the blank cover put the boot in the hole for safe keeping.
Keithley 2600 series LAN --> USB interface possible? - Page 1
Forum section: electronics / testgear

author: smoothVTer
author_rank: Regular Contributor
timestamp: October 26, 2021, 03:02:42 pm
content: I have several Keithley 2600 SMU's which have on the rear panel a LAN port. I'm attempting to make a common USB interface to all my lab instruments for automation purposes, and these older LAN-interface units are giving me a headache. Has anyone out there successfully used a LAN-to-USB converter on one of these units? I'm not sure if this is even possible ... protocols differ, data packets etc...but I'm asking here for more information. If you've been successful, what is the hardware you used? If you've not been successful, what were the technical hurdles that stopped progress?
Add Tracking Generator to IFR 1200S from A-7550 - Page 1
Forum section: electronics / testgear

author: wiredwrx
author_rank: Contributor
timestamp: October 25, 2021, 08:58:24 pm
content: Please bare with me and my nutty ideas. I have an IFR 1200S, but it lacks the tracking generator. I have a few A-7550 units, all with tracking generators. Some of the 7550s are parts units. As you probably know, the 1200 and 7550 look very similar externally. I know it's possible to add a TG to the 1200, so I wonder if the TG from the 7550 can be moved/installed into the 1200. Ya, crazy, and I doubt it, but thought it might be worth the question.TIA,Michael
Signal integrity on CAN-Bus - Eye Diagram and Eye Mask - Page 1
Forum section: electronics / testgear

author: Oze
author_rank: Newbie
timestamp: October 25, 2021, 08:26:30 am
content: Hello everyone,I am a long term viewer of the EEVBlog but finally I need the help of this awesome community. I'm currently struggling with the measurement of the signal integrity of a low speed CAN-Bus network (125 kbit/s).I want to measure the signal integrity using an eye diagram on my Oscilloscope (R&S RTB2004). Therefor I've connected a differential Probe on the CAN-H and CAN-L lines and activated infinite persistence on my Oscilloscope. I got a beautyful eye diagram on screen but now I don't know how to determine if the siginal integrity is still ok because I don't know where to get an Eye Mask for the CAN-Bus with 125 kbit/s. So can anyone provide a way how to determine the shape of the valid region so I can determine if my signal integrity is ok or not?Thank you so muchOze

author: thinkfat
author_rank: Unknown
timestamp: October 25, 2021, 08:34:26 am
content: You need the recovered bit clock as a trigger, otherwise it'll be just a pretty picture on the scope screen.

author: dietert1
author_rank: Super Contributor
timestamp: October 25, 2021, 09:01:52 am
content: I think CAN is an application of RS485.https://www.ti.com/lit/an/slla375/slla375.pdfhas some introduction.Regards, Dieter

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: October 25, 2021, 05:38:56 pm
content: If you have access to one of the devices, trigger on the signal going into CANbus phy (TX line)Leo