hybridfree/eevblog-posts huggingface dataset:
R&S NGE103B constant current mode is reading back voltage in 100mV steps - Page 1
Forum section: electronics / testgear

author: Gulftown
author_rank: Regular Contributor
timestamp: May 28, 2024, 12:28:58 pm
content: Hello,i try to use a R&S NGE103B FW1.57 to aquire charging curves of batteries.Therefore the supply is in constant current mode until the battery is nearly full.When in CC mode the output voltage readback is jumping up in exactly 100mV steps and not increasing smoothly as expected.Testing with a resistor revealed that the current regulation is working as expected in 1mA steps but somehow the internal voltage readback is losing one digit as soon as the cc mode engages.So the charging curves logged with test controller are completly useless and i need to use another instrument for it.When in CV Mode, the readback resolution is 10mV as expected.Is this a common problem of this type of supply, because i cant find anything in the datasheet hinting at such a poor readback performance?Thanks
Keithley/Tek DMM6500 streaming troughput 16bit mode. - Page 1
Forum section: electronics / testgear

author: miro123
author_rank: Frequent Contributor
timestamp: January 23, 2024, 04:48:34 pm
content: Hello TE expert,I have one question related to Keythley DMM6500.I want to use the multimeter to capture continues data in high speed 16bit mode.What is the LAN throughput without loosing any samples.I need all data to be collected to PC for let say 1..2weeks .The datasheet Page 11 table "Bus Transfer Speed " gives only average numbers for 1000 readingsThanks in advanceMiro

author: MegaVolt
author_rank: Frequent Contributor
timestamp: February 07, 2024, 12:56:29 pm
content: 60 kilo samples in second.They have a PC application that can capture data continuously. They promise 60K/s

author: miro123
author_rank: Frequent Contributor
timestamp: February 10, 2024, 05:12:01 pm
content: Thanks I alredy received my DMM6500. I will try and test it using python via LAN interface. I already have it running on standart /low speed mode/ using RAW socket interface.According to spec is "Average for 1000 readings with relative timestamp (binary) LAN 160,000Sps

author: MegaVolt
author_rank: Frequent Contributor
timestamp: February 12, 2024, 08:34:37 am
content: Quote from: miro123 on February 10, 2024, 05:12:01 pmKeep us updated on your progress.

author: Wil_Bloodworth
author_rank: Regular Contributor
timestamp: February 28, 2024, 02:07:05 am
content: How’s it going with your testing on this?- Wil

author: bateau020
author_rank: Frequent Contributor
timestamp: May 28, 2024, 07:37:19 am
content: USB will be faster. Keithley also says this in one of their docs (1KW-61357-0_DMM6500_Datalogging_Application_Note_080318). The LAN interface is 100BT only, the USB 2.0 interface can go up to 480Mbps.Also see github.com:tektronix/keithley, in instrument examples/DMM6500/Streaming...
CompuVideo SVR-1100CB vectorscope - Page 1
Forum section: electronics / testgear

author: Lathe26
author_rank: Contributor
timestamp: May 27, 2024, 11:31:59 pm
content: Here is a "basic setup" cheat-sheet I created for CompuVideo's SVR-1100CB vectorscope. Hopefully this will prove useful for other folks and avoid wasted time trying to figure out the right combinations of settings to operate it.The manual does not appear to be available online (anyone here seen it?). The cheat-sheet is based off of original ones created back-in-the-day for somewhat similar models (below example is one from an eBay listing). Additional settings added to improve clarity.
Quick Question: Fluke 8600A - (S)N7447B BCD Driver (65 °C) temps okay? - Page 1
Forum section: electronics / testgear

author: kblue
author_rank: Regular Contributor
timestamp: May 31, 2024, 09:44:35 pm
content: Greetings once again!I repaired a Fluke 8600A and its running fine again within specs. But i'm not sure about the temps of the BCD-Driver marked with N7447B. ForTi SN7447ATais specified around 0 - 70 °C. The IC in question settles around 65 °C (23 °C ambient) outside the instrument, is this "okayish"? Mayhaps it's better to fit a flat heatsink onto it for more surface area?5 V supply seems okay (4,9995 V).Thanks in advance!/update 06/05/2024: a little heatsink reduced the temps around 10-15 °C
Voltage Reference In Fluke 754 - Page 1
Forum section: electronics / testgear

author: CalibrationGuy
author_rank: Unknown
timestamp: May 28, 2024, 09:56:40 pm
content: We have several Fluke 754 units. They have been in calibration ever since we bought them, oldest one is 14 years old. Since they are so good, I was wondering if anyone knows which voltage reference IC they use. If anyone here has a schematic, even better. I don't want to open the case because they are really expensive and they all work flawlessly. Thanks!TomG.
SDS800X HD V1.1.3.6 - Bugs and testing new Features - Page 1
Forum section: electronics / testgear

author: eTobey
author_rank: Super Contributor
timestamp: May 26, 2024, 07:39:24 pm
content: This topic is about bugs and new features (also about existing ones).I think i got one bug yet again:I cant get a stable trigger at all on a squarewave. Find the settings file attached.It is a 1 MHz 50% duty squarewave.

author: nctnico
author_rank: Super Contributor
timestamp: May 26, 2024, 07:58:30 pm
content: Your samplerate is too low. You are looking at an aliased signal. It is a good idea to have peak-detect enabled by default. Then you'll never get surprised by aliased signals like this.

author: 2N3055
author_rank: Super Contributor
timestamp: May 26, 2024, 08:21:04 pm
content: You are not normal, I swear to God....Another topic about same thing...We literally lost the count by now....Not to mention it is not a bug, but you having no clue how to use the scope...Not this scope, scopes in general..

author: gnif
author_rank: Unknown
timestamp: May 26, 2024, 08:25:43 pm
content: @eTobeyyou even posted to the other thread that is on this topic!Stop staring new duplicate threads.Locked.
Should I terminate the trigger output of a spectrum analyzer when not used ?  - Page 1
Forum section: electronics / testgear

author: electronic_guy
author_rank: Regular Contributor
timestamp: May 24, 2024, 03:50:27 am
content: Hi,I have an Agilent CSA N1996A spectrum analyzer. It comes with the trigger generator. I understand that open circuit in RF means reflection. In fact total reflection.When I work with the the stimulus response mode I do not see a way to turn OFF the trigger source. As soon as I connect the cable from RF_out to RF_in it works, so I can see that the source stays active when I haven't connected anything.I'm just wondering if this can damage my SA trigger source. I know modern SAs have some protection for reflection, but prolonged reflection can degrade the SA source. I think if this is the case then it's completely unnecessary damage.So can you explain if this is an real concern for me to worry about in using a SA with trigger source, or for any RF signal generator for that matter ?

author: electronic_guy
author_rank: Regular Contributor
timestamp: May 25, 2024, 02:27:19 pm
content: Anybody wants to give this question a go.

author: Bud
author_rank: Super Contributor
timestamp: May 25, 2024, 03:04:25 pm
content: Read the device User Manual. If there is nothing in it about terminating the unused ports, live them alone.

author: DaJMasta
author_rank: Super Contributor
timestamp: May 25, 2024, 05:40:49 pm
content: Generally not important. If your external trigger is running hundreds of MHz to GHz speed (repetitive or just edge speed), then maybe you have a reason to terminate, but generally these ports are marked that they need to be terminated when not in use and come with one attached (often physically, to the instrument).If you actually mean tracking generator, the output frequency could certainly justify it, but these are generally designed to have sufficient protection from running as an open - it is test equipment, after all. They're also usually not all that powerful in terms of maximum output level, so it doesn't take elaborate design or expensive parts for them to be protected from their own output power reflected back.
MOVED: Metcal STSS-002E Soldering System Manual - Page 1
Forum section: electronics / testgear

author: Halcyon
author_rank: Unknown
timestamp: May 25, 2024, 05:41:22 am
content: This topic has been moved toOther Equipment & Products.https://www.eevblog.com/forum/index.php?topic=429364.0
Is more resolution available on an oscilloscope when pulling data over USB? - Page 1
Forum section: electronics / testgear

author: jrmymllr
author_rank: Regular Contributor
timestamp: May 24, 2024, 04:56:32 pm
content: This one has me perplexed. I'm using a Tek MDO series scope and was surprised to see samples pulled over the TekVISA USB interface of around 100V peak on the 20V/div range. The signal is a sinewave, and it's definitely clipping on the built-in display which should be topping out at 80V with the reference set at the middle.I thought there's no way this is possible because why wouldn't the manufacturer want to display the full resolution? Or is this a matter of exceeding the range and possibly not being in spec, which is why it clips on the display?

author: Berni
author_rank: Super Contributor
timestamp: May 24, 2024, 05:19:29 pm
content: The actual hardware dividers and the display range might not always be 1:1 since the scope doesn't always have as many hardware gain settings in the AFE as it has ranges. There is also some headroom for calibration in software. ADCs and AFEs can also act funny in transitions into and out of clipping.For example DMMs will often show more digits when read out trough SCPI versus what is on the display. They simply output the full unmodified raw values it is working with internally. The extra digits are likely useless, but the numbers don't have to be neatly formatted for human readability. It just minimises any rounding errors by skipping the rounding and just giving you the raw value, since if you are using SCPI that number is going to be interpreted by a computer, not a human. So any math the computer does on that number won't have rounding errors stack up.For example on spectrum analyzers it is common to be able to get more points per sweep over SCPI than the built in display can show.

author: electr_peter
author_rank: Unknown
timestamp: May 24, 2024, 05:20:00 pm
content: Not a full resolution of ADC is mapped to visible screen, giving some "headroom" above or below. IIRC Keysight X3000T maps 240 values (out of 256) to visible screen. Not sure how Tek does this, look for vertical range specs in datasheets.
Mastech MS8260E calibration - Page 1
Forum section: electronics / testgear

author: bborisov567
author_rank: Regular Contributor
timestamp: May 27, 2024, 12:16:44 pm
content: After some repairs i want to calibrate a Mastech MS8260E dmm. Unfortunately there is no documentation available online. There is no schematic, nor service manual. I tried contacting Mastech but got no response. There are at least 10 trim pots inside the unit so with documentation it is impossible to calibrate. Does anybody has information regarding the calibration?
DIY powersupply really old with push-buttons special idea - Page 1
Forum section: electronics / testgear

author: oz2cpu
author_rank: Frequent Contributor
timestamp: May 23, 2024, 12:52:34 pm
content: here is a new teardown video from me,this design idea is so special and rare it is worth to mention here:https://youtu.be/nZnH6WrpSAUi think it is from 1975-1985, name of designer unknownthe push-buttons for all voltages is a really special idea, I have not seen anything like this before,it dont really work in real life if you ask me :-)this one is full of loose connections and unstable behaviours, i did not repair it for now, since its low useability for my lab / collection.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 23, 2024, 03:26:07 pm
content: yeah tons of possible failures thks for the video

author: oz2cpu
author_rank: Frequent Contributor
timestamp: May 23, 2024, 08:51:48 pm
content: exactly.. I think we figured out what this idea is not seen anywhere else..or please prove me wrong :-)

author: nctnico
author_rank: Super Contributor
timestamp: May 23, 2024, 11:17:47 pm
content: Quote from: oz2cpu on May 23, 2024, 12:52:34 pmSome PSUs have a slide switch for a semi-fixed output channel. Like this one from Siglent:So the idea is not that weird.
NOS Pomona Cables, gassing+split plastic how to clean? - Page 1
Forum section: electronics / testgear

author: Vertamps
author_rank: Contributor
timestamp: May 07, 2024, 06:44:16 pm
content: Hello, bought these two vintage shielded Pomona cables(model 1167-60).There probably from the early 80's im guessing, Well i got an extra discount as each cable has a connector end that is split. Just gonna plastic epoxy them.The cables are gassing and SMELL, and leave the smell on my hands.*Will Soaking in isopropyl alcohol damage the cables further and cause more gassing?-Cleaning a few times with dish soap and water seems safe option.Alternative @$55 brand new from digikey, with the extra discount from the seller i figured i could save the cables and be happy./*edit, a quick google mentions baking soda scrub, ill try that on one cable and dish soap on the second cable then compare.*/

author: stj
author_rank: Super Contributor
timestamp: May 22, 2024, 04:08:23 pm
content: if the cables are losing the plsticiser then they will become stiff and crack

author: Stray Electron
author_rank: Super Contributor
timestamp: May 22, 2024, 08:12:34 pm
content: I'm not sure about the plastic used to make those cables but for rubber and synthetic rubber products they say NOT to use hydrocarbon solvents to clean them. They recommend ammonia for cleaning. Solvents dissolve out the plasticizers and make plastic and rubber products to dry out and to crack even worse.I have some very old Pomona cables and I don't think that I've ever seen any of the plastic crack but perhaps Pomona changed the formulation at some point.I just use plain household ammonia from the grocery store for cleaning. I usually dilute it with about equal parts water but for heavy duty cleaning I just use it straight.

author: Vertamps
author_rank: Contributor
timestamp: May 23, 2024, 03:09:26 am
content: Ill try the ammonia, the cables are operating fine and i think total for $35 for the pair after discount the may work till the world stops turning.
Tektronix 016-0829-00 Blank Plug-In for 11K Series - Page 1
Forum section: electronics / testgear

author: calibrationfixture
author_rank: Regular Contributor
timestamp: May 20, 2024, 07:13:33 am
content: Hi to All,Seeing some Lab Tours on YouTube I noticed Tektronix 11K Mainframes working without the empty slots populated with these blank filler Plug-Ins. These are crucial in directing the airflow. These Blank Plug-Ins are only designed with this in mind. Not to create a platform to make your own Plug-In like the Kits for the 7000 and TM500 Series. Those have PWB's. The 016-0829-00's didn't have these and they never existed.https://w140.com/tekwiki/wiki/016-0829-00Calibrationfixture

author: coromonadalix
author_rank: Super Contributor
timestamp: May 20, 2024, 01:06:59 pm
content: some places offer them in USA, but at 95$ USD

author: kbrill
author_rank: Contributor
timestamp: May 21, 2024, 03:26:32 pm
content: Not sure if this response is appropriate , if not adviseI have a very clean 016-0829-00

author: Testtech
author_rank: Regular Contributor
timestamp: May 22, 2024, 11:36:07 pm
content: You can also use the 7K blank filler, it is just a front with plastic guides, works fine. 016-0155-00.

author: edavid
author_rank: Super Contributor
timestamp: May 23, 2024, 12:05:40 am
content: Is there any evidence for this idea that the filler panels are required? I have not noticed any temperature increase with my DSA602 or 11302 with some plugin slots empty. There is not a lot of air leaking out either.

author: colorburst
author_rank: Regular Contributor
timestamp: May 23, 2024, 01:00:48 am
content: The 11302 manual says the following on page 1-5:QuoteAnd later on,Quote
Siglent 1104x-e not triggering on probe compensation signal - Page 1
Forum section: electronics / testgear

author: Lorisermejo
author_rank: Newbie
timestamp: May 22, 2024, 12:15:42 pm
content: HiI was comparing my new to me sds1104x-e with my other scopes and i noticed that in some setting the scope won't trigger in a repeatable way on the rising edge of the probe compensation signal and shows a flat line but if i press more or less any key or knob it will trigger correctly but if i disconnect and reconnect the probe i have a 50/50 chance of not triggeringIt does that on the auto trigger but not on the normal triggerWhat am i doing wrong?

author: TheDefpom
author_rank: Frequent Contributor
timestamp: May 22, 2024, 07:05:07 pm
content: Make sure you have hold off turned off or down to it’s minimum setting.

author: Lorisermejo
author_rank: Newbie
timestamp: May 22, 2024, 07:50:36 pm
content: WellI remember I modified it some days ago but then i disabled itI checked now and reports "holdoff close" (probably meaning minimum)I pressed the button and shows 50msI pressed again bringing it back to " holdoff close" and now it worksThanksI thought it was a bug
Old inf or new info - Page 1
Forum section: electronics / testgear

author: thedoc298
author_rank: Contributor
timestamp: May 22, 2024, 08:44:50 pm
content: After reading for some day's and weeks about Rigol 804 mod, I read about many ways to do the mod. Also later to find out these dont work. I have found the post by andybig and it seams good to go. So my question is does his method still work or not. All I need is a yes it works or no it don't anymore. Thanks

author: Martin72
author_rank: Super Contributor
timestamp: May 22, 2024, 09:41:13 pm
content: Hi,I came across your post by chance - the title says nothing at all about what you actually want to know.Then:Why don't you post this as a question in the existing thread? That would make much more sense...

author: J-R
author_rank: Super Contributor
timestamp: May 22, 2024, 11:29:51 pm
content: He already posted in the other thread, and got an answer:https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/msg5489479/#msg5489479What part of this is not working for you?https://www.eevblog.com/forum/testgear/hacking-the-rigol-dho800900-scope/msg5344076/#msg5344076Quickest/simplest method is ethernet and set model to DHO924.
XGECU TL866II overcurrent protection help ? - Page 1
Forum section: electronics / testgear

author: tonycstech
author_rank: Regular Contributor
timestamp: January 27, 2023, 08:25:40 pm
content: I was trying to flash a chip on board that had low 3.3v resistance on it and XGECU TL866II was giving me protection errors.Now i get the same error on all boards i try to flash.Anyway to fix that ?

author: coromonadalix
author_rank: Super Contributor
timestamp: January 27, 2023, 11:19:11 pm
content: give more specifics ..if the programmer goes into protection, something is definitely wrong ... circuit design etc ... Ie an eeprom with too many stuff on the same voltage line etc ...

author: Martin72
author_rank: Super Contributor
timestamp: January 27, 2023, 11:50:40 pm
content: QuotePower the board up with external supply, then try again.When doing in-circuit programming, most programmers can´t handle the current flowing because the chip is not the only consumer on the board.

author: armenh7
author_rank: Newbie
timestamp: May 09, 2024, 12:04:26 am
content: Quote from: tonycstech on January 27, 2023, 08:25:40 pmDid you figure out a way to bypass it? I'm trying to do in circuit programming and it's risky desoldering the EEPROM.

author: armenh7
author_rank: Newbie
timestamp: May 09, 2024, 09:42:39 am
content: Quote from: armenh7 on May 09, 2024, 12:04:26 amTurns out there's a built in option in the software to increase over current protection. I set it to 350 and it worked!

author: stj
author_rank: Super Contributor
timestamp: May 22, 2024, 04:06:45 pm
content: schematicshttps://github.com/radiomanV/TL866/tree/master/docs
Buying a second multimeter, any recommentations for my needs? - Page 1
Forum section: electronics / testgear

author: TnF
author_rank: Contributor
timestamp: May 22, 2024, 09:15:30 am
content: Hello. I'm at the point that i can spend some money for new equipment, more particularly a 2nd multi-meter.While i had some very cheap multimeters when i was young i do own a Brymen BM319s which has some automotive handy features.I've been owning it for 10 years now and i am very happy with it (bought Brymen because of Dave), 6000 count only thoughNow i have the following requirements for a second meter:- AC/DC current clamp: Very useful and fast when working in cars, no need to connect meter in series, plus you can measure higher than 10A). BM319s has an inductive pickup but it's meant only for rpm pickup from the spark plug coil. There is also the option of purchasing an external clamp, which has the benefit of usually being smaller, meaning it will have better access and also can be used in any meter. There are downsides too though.- True RMS: Useful when i am repairing PSU's for example- Higher counts/resolution: Nowadays all my projects are with 3.3V micro's, so some better resolution and accuracy is appreciated, 60000 counts would be nice- AUTO HOLD: Self-explanatoryHighly wanted optional features:- Thermocouple input: Useful to have more than one temp meter (BM319s already comes with one)- Datalogging: Internal/Wireless preferably or Wired- BacklightOptional features:- VFD? Insulation testing? RST?My father is an electrician and sometimes he borrows my stuff, mainly because mine are either better or just in working condition since he mishandles everything- Anything useful???

author: coromonadalix
author_rank: Super Contributor
timestamp: May 22, 2024, 10:04:50 am
content: You asked on other threads for some meters advice's, and i see you ask for a lot of recommendations ... It may or will annoy people(s)Do yourself a favor, do some search here, there is plenty of answers...There is an huge list of meters on eevblogAnd for your father : tell him to get his proper tools and stop borrowing yours, you need to know the state of your instruments, if someone borrow them and brake them ....

author: armandine2
author_rank: Frequent Contributor
timestamp: May 22, 2024, 01:02:52 pm
content: https://www.fluke.com/en-gb/product/electrical-testing/digital-multimeters/87v-imsk
An issue with Aneng 620A multimeter. - Page 1
Forum section: electronics / testgear

author: avitsur
author_rank: Contributor
timestamp: May 21, 2024, 02:58:47 pm
content: I've purchased this Aneng 620A smart multimeter (Chinese, of course) from Aliexpress about a year ago. I've used it and had no complaints. yesterday I wanted to measure DC current but there was no reading on the display (as if the probes weren't connected. I've started to check for the reason and opened the back cover to see if there's a fuse in it. there's one indeed and the value on the fuse - it's blown, by the way - is 10A/250V. now, and that's the odd part, on the cover of the battery compartment, it's written that the fuse is 400mA/600V. in the "manual" supplied with the instrument, there's not a word mentioning the existence of a fuse or it's value. I guess the correct value is 10A, because the the meter is supposed to measure currents up to 10A.
running apps on Rigol DHO0804 - Page 1
Forum section: electronics / testgear

author: oficerJK
author_rank: Newbie
timestamp: May 20, 2024, 08:49:04 pm
content: Hello everyone !Many time I can see on the net and Youtube that people can run other application on system Android of Rigol DHO0800 series.I kindly ask You for advise how to do it what I need to know and perform to change my oscilloscope in order to get possibility switch between tablet mode and oscilloscope mode . Maybe it is easy bot I am beginer . sorry for that.Thanks in advance for full clarification but not only for me...\

author: stj
author_rank: Super Contributor
timestamp: May 21, 2024, 11:21:54 am
content: i wouldnt do that,if you brick it with an app that updates an existing file your going to be in big trouble unless you void the warranty and backup the internal SD card first.

author: eTobey
author_rank: Super Contributor
timestamp: May 21, 2024, 11:38:37 am
content: Quote from: stj on May 21, 2024, 11:21:54 amIndeed! Android is quite often a pain in the a** on itself, even if you have the source code of every app that is running.And what do you need that for? Do you want to play doom with it?
Siglent SHN900A portable VNA's - Page 1
Forum section: electronics / testgear

author: tautech
author_rank: Super Contributor
timestamp: May 21, 2024, 03:47:17 am
content: 14, 20 and 26.5 GHz 2 port models.8.4-inch touch screen, Multi Touch, Mouse and Keyboard supportStandard VNA and CAT mode, Optional SA modeFrequency Range: 30 kHz~26.5 GHzPort terminals: NMD 3.5 mmRange of IFBW: 10 Hz~3 MHzDynamic Range: 110 dB (typ.)Stimulus -45 dBm ~ +10 dBmStandard Bias-Tee4h Working TimeStandard GPS, Time and Location Information Saving2ports: S-parameters, Time Domain, Pulse MeasurementLANWebServerDatasheethttps://int.siglent.com/u_file/download/24_04_23/SHN900A_Datasheet_EN01B.pdfhttps://int.siglent.com/products-overview/shn900a/https://siglentna.com/vector-network-analyzer/shn900a-portable-vector-network-analyzer/https://www.siglenteu.com/vector-network-analyzer/shn900a-portable-vector-network-analyzer/
Mitutoyo Digital ABS CoolantProof Calipers IP67  - Page 1
Forum section: electronics / testgear

author: w.v.s.
author_rank: Frequent Contributor
timestamp: May 20, 2024, 02:18:27 pm
content: Hi,I've bought a set of heavily mistreated (electronics seem to be intact, display broken, but data output works) absolute Mitutoyo calipers. How the sensor system looks like for the standard calipers, can already be found on web-pages like this one:https://www.grant-trebbin.com/2014/04/digital-calliper-teardown-and-repair.html. I did not find similar material for the absolute scales, but was curios so I did a bit of tear-down, which I start sharing today. I seems to work with inductive coupling between the center lanes and the two outer lanes. We can see the phase difference between the center and outer lanes gradually changing along the scale.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: May 20, 2024, 02:20:47 pm
content: Here is the sensor PCB, the second picture with increased contrast.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: May 20, 2024, 02:27:07 pm
content: Here are the start and the end of the scale shown in detail.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: May 20, 2024, 02:30:58 pm
content: And this shows how the depth bar is fixed (probably welded) to the slider.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: May 20, 2024, 02:37:48 pm
content: I anyone knows, where I could buy that type of LCDs, please let me know.
OWON SDS1022 (VEVOR Re-badge) won't download to notebook - Page 1
Forum section: electronics / testgear

author: Elecmuso
author_rank: Contributor
timestamp: May 09, 2024, 11:07:43 am
content: G'dayHave recently got myself a VEVOR SDS1022 and for the money it is great. But I cannot download to connected laptop. Have followed instructions to the letter and tried with 2 different notebooks with same result (one running Windows 11, the other windows 10). The green text in the lower right corner of the PC application display is displayed green indicating connection is there but trying to actually download data ends in an error.Anyone had this and figured out a solution?

author: Elecmuso
author_rank: Contributor
timestamp: May 21, 2024, 09:12:55 am
content: Anyone who has bought a Vevor scope, have you managed to download screen to a PC?

author: Elecmuso
author_rank: Contributor
timestamp: May 21, 2024, 11:34:57 am
content: Well that was weird. Went to the same download area of the OWON site and downloaded it again - but it was a far more recent version. As though OWON had uploaded a new version today.The old version I had was Version 2.2.2 (bulid:201908030943) which did not work.The new version is Version 1.6.25.0 (bulid:202309191612) which does work.

author: Elecmuso
author_rank: Contributor
timestamp: May 21, 2024, 12:03:57 pm
content: Had another look at the website download functionality (https://www.owon.com.hk/download.asp?category=Digital%20Oscilloscope&series=SDS1000%20Series&model=&SortTag=\).If you select 'SDS series' you will get the wrong version. Only by selecting 'SDS1000 series' will you download the correct version.

author: Aldo22
author_rank: Super Contributor
timestamp: May 21, 2024, 12:36:18 pm
content: Quote from: Elecmuso on May 09, 2024, 11:07:43 amDoes that even exist?Isn't it an SDS1122?

author: Elecmuso
author_rank: Contributor
timestamp: May 21, 2024, 10:31:00 pm
content: You are half right (and yep my bad) - not a SDS1022 Nor SDS1122. It is a re-badged OWON SDS1102! Checked under the utility menu.
Rohde & Schwarz Bluetooth Tester CBT HDD Image anyone? - Page 1
Forum section: electronics / testgear

author: oe6mhe
author_rank: Newbie
timestamp: May 19, 2024, 09:08:44 pm
content: Hello,I am looking for a working HDD image of the Bluetooth Tester "CBT" by Rohde & Schwarz.Any help appreciated.ThanksMichael
5uH LISN schematic varies? - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: May 19, 2024, 08:12:30 pm
content: Hi,Page 2 of this...https://www.tekbox.com/product/TBL0550-1_Manual.pdf..shows a 5uH LISN with a 5uH inductance.But 07:25 of this video, shows the 5uH LISN schematic with some 470R resistors connected across the inductance..Do you know which one is used by the standards bodys?Also, what is the output filter of the power supply used at the EMC labs, upstream of the LISN? (pse see attached).....its output CLC filter affects the peak of the ring-up voltage when the DUT is suddenly switched ON....there is a danger of overvoltaging something at the DUT.
Eevblog 235 meter. - Page 1
Forum section: electronics / testgear

author: Russtopher
author_rank: Newbie
timestamp: May 19, 2024, 04:03:34 am
content: HelloWhen I turn on my meter, the display gives me this prompt, InEr and just beeps. Anyone ever have this issue before. What would cause this?Thank youRuss

author: tooki
author_rank: Super Contributor
timestamp: May 19, 2024, 08:55:47 am
content: The user manual explains it. Is it occurring when the condition mentioned in the manual is not present?

author: Antrus
author_rank: Contributor
timestamp: May 19, 2024, 09:48:48 am
content: Most likely the current jacks are dirty. You need to wipe them with a cotton swab with alcohol. They are affected by any dirt.

author: Russtopher
author_rank: Newbie
timestamp: May 19, 2024, 02:21:33 pm
content: HelloThe user manual does not address this issue. It happens as soon as it is turned on, with or without the leads plugged in. 🤔Thank YouRuss

author: DaneLaw
author_rank: Frequent Contributor
timestamp: May 19, 2024, 03:04:35 pm
content: Quote from: Russtopher on May 19, 2024, 02:21:33 pmHave you used the "search" feature, before starting a post?Looks like it's been debated five ways to Sunday on Brymen meters..https://www.eevblog.com/forum/search2/- InEr -

author: Zandor
author_rank: Contributor
timestamp: May 19, 2024, 06:27:26 pm
content: You should not see that with nothing plugged in.The meter thinks there is something plugged into one of the two left test amp plugs when you are in the V mode like in the picture.Is it a new meter or did it just start doing it? At any rate, take a close look at the 2 left plugs and see if there is anything in there to make it think something is plugged in.Here is what the manual says about it:Beep-Jack™ Input WarningThe meter beeps as well as displays “InEr” (insertion error) to warn the user againstpossible damage to the meter due to improper connections to the uA, mA, or A inputjacks when another function, especially a voltage function, is selected.
Beckman Helipot T-10-A Half tear down Video, Precision 5W Potentiometer - Page 1
Forum section: electronics / testgear

author: Vertamps
author_rank: Contributor
timestamp: May 19, 2024, 05:37:19 am
content: Hello, id like to start making short forum based vlogs. Goal is clean,edited and non-entertainy style.//https://youtu.be/d3jfa7jfO8Y?si=XCeKGz2UKFKpfSul
CMU200 stops in DOS - Page 1
Forum section: electronics / testgear

author: Seb730
author_rank: Newbie
timestamp: May 17, 2024, 07:29:04 pm
content: Good evening, please help me start CMU200. It displays the message as in the picture: "end of verm.bat" and the path "C:\INTERNAL\LOG". I was asked to replace the disk with an SSD, I made an image and uploaded it to the new disk. The above-mentioned message is displayed on both drives. Unfortunately, I did not turn on the device before removing the factory disk, so I cannot determine whether it was like that from the beginning. The R&S logo appears before this message, you can enter Version Manager. Thank you very much for any tips.
New 3456A acquire out of box tracks my other 3456A! + Show and tell Video - Page 1
Forum section: electronics / testgear

author: Vertamps
author_rank: Contributor
timestamp: May 24, 2024, 04:39:48 am
content: https://youtu.be/QfsmABSE0Xc?si=U8dACa614HMUiTFPWas looking were to post, decided to pull the trigger here.Showing off: Two 3456A's, Fluke 8505A, HP3458A and my FLuke 731b's + Doug's Reference5:43 video.
BM786 Input Legend + Selector Wobble Question - Page 1
Forum section: electronics / testgear

author: MildInductor
author_rank: Regular Contributor
timestamp: May 15, 2024, 12:44:05 pm
content: Hi everyone, I recently received my EEVBlog BM786 and wow is it a great DMM! I have two questions relating to it:1) Above the two leftmost inputs there is a small symbol which I haven't been able to find a reference for in the manual. Perhaps someone can tell me what it means? I have attached a photo of the symbol in question.2) The input selector appear to have quite a bit of wobble in the up/down direction. Is this normal? I have attached a GIF of the wobble.

author: joeqsmith
author_rank: Super Contributor
timestamp: May 15, 2024, 01:09:04 pm
content: At 1 hour 9 min, you can see how the prototype 786 switch was after 50,000 full cycles. The symbol wasn't something I asked them about. Looking at a draft of the manual, there was no mention of it.

author: Caliaxy
author_rank: Frequent Contributor
timestamp: May 15, 2024, 01:23:27 pm
content: Quote from: MildInductor on May 15, 2024, 12:44:05 pmIt means that the meter will beep if you insert a plug in any of the two current inputs and the rotary dial is not set for measuring current. This is supposed to prevent user errors (and save expensive fuses).

author: sonpul
author_rank: Regular Contributor
timestamp: May 15, 2024, 01:24:59 pm
content: The symbols at the top left above the terminals indicate that if the probes are connected incorrectly, a signal will sound.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 15, 2024, 01:44:03 pm
content: woah that does wobble a lot ?? but seems in heightif you play like this is the meter still maintain its position on the dial notches or it create falses functions selections or intermittent readings etc .. ?

author: J-R
author_rank: Super Contributor
timestamp: May 15, 2024, 09:23:12 pm
content: Page 22 of the manual under "Special Features": "BeepJack™"Other Brymen models have a larger symbol with the word "JACK" inside. They might have been space constrained on the BM78x series and changed it.My BM789 selector is also similarly loose. It should not be a problem, as the portion you are rocking does not have the contacts in it. It connects to the actual selector via a shaft. That selector is held in by another plastic piece with 4 screws and so it is not able to move as much. Here is a photo from another thread:https://www.eevblog.com/forum/testgear/brymen-bm789/msg3700972/#msg3700972
HP 53132A accuracy question - Page 1
Forum section: electronics / testgear

author: bristpi176
author_rank: Contributor
timestamp: May 15, 2024, 02:47:43 pm
content: Hi all,I'm testing a recent purchase, an HP 53132A with the 3GHz option and an aftermarket OXCO. It passes all its self tests and passes calibration. After a couple of days warm up, I had it count its own reference with small variations of the least significant digit (400 microhertz), so I consider that good.The question is, when I calibrate it against my house reference, an HP 58503B that appears to be working well, it shows 10MHz, with variation in the least significant digit varying, then the count drifts lower over time and seems to settle approximately 50 millihertz down while still on the house reference. This process happens after every calibration. Does this sound like normal output? If not, what do I do to get it to read properly.Thanks in advance for any help you can provide.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 15, 2024, 03:38:11 pm
content: you have aging effects to take into consideration for your aftermarket board, and your home instrument reference, does it have ocxo tcxo in it ??do you have access to an gps do ?

author: bristpi176
author_rank: Contributor
timestamp: May 15, 2024, 04:30:08 pm
content: My house reference is an HP GPSDO. As far as aging, I'll continue to run this experiment until I see several days of consistent output. It still may be dropping but more slowly
Fluke 89iv or 289 for unattended fast transient capture? - Page 1
Forum section: electronics / testgear

author: Bakaman
author_rank: Contributor
timestamp: May 14, 2024, 10:42:43 pm
content: I have intermittent failures that may be down to power spikes, so I want to log max peak voltage across the ac supply.The 89iv has fast max peak re recording mode, but what happens if left in that mode and the batteries go flat? Is the peak and its time stamp written to memory before gracefully shutting down? I presume not, but don't want to exhaust a set of batteries trying it.An alternative might be to use the logging, and let it record any unstable events, and it will gracefully power down after the batteries die. Does anyone know the minimum length of instability that the 89iv will detect and log?My plan was to leave the 89iv and a 289 on site and collect them after one week, one meter to capture fast transients, whilst the other just logging supply voltage and recording and unstable events. The batteries will die in that time, so graceful degradation and reading preservation is key.Is that plan fundamentally flawed?FYI, the target system is 230V single phase, and we are getting occasional blowing of input surge protection fuses on our rectifier modules. The fuse is F15A online and upstream of a 320V MOV that starts to conduct at around 800V peak, so that is a likely to be a high-energy spike that nobody has looked for before. Thoughts on a transient recording strategy if the 89iv and 289 won't work well enough? My goal is not to capture the 'biggest spike, but to see how clean and variable the supply is generally. If we are getting 400-500v peaks wrt earth then it would seem plausible that even larger peaks are possible, in which case perhaps hiring a PQ analyzer would be justified on a follow-up visit.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 15, 2024, 01:12:51 am
content: 89IV are the 1st version of the 187 189 series, for longer logging on 189you can add a battery pack BP-189 when you can find them ... they can provide up to 400hrs of logging with bigger cellsbut alas their price as risenbut as you wrote for transients they maybe not up for this task, scope with the right probes and data logging software would be better
Power consumption wave analysis for Tesla Key by a uA Level Power Monitor  - Page 1
Forum section: electronics / testgear

author: qtanand77
author_rank: Newbie
timestamp: May 14, 2024, 07:52:37 am
content: I use ReeJoee 850Lx, a power analyzer for testing low power consumption at uA level at high accrucy, I use it to teck the power comsuption for small eclectric product like car key.more information check:https://reejoee.com/
Software File for OptiView SIII Wireless Network Analyzer Option (opvwna-v3.exe) - Page 1
Forum section: electronics / testgear

author: martonbaksa
author_rank: Newbie
timestamp: June 15, 2020, 05:08:43 am
content: Hello to the fellow Fluke OptiView owners,I just posted about this under the wanted/for sale part of the forum, but I believe that this is a good fit here too. I am in a tough spot. I need this software file in order to regain functionality to measure WLANs but unfortunately I lost my recovery CD. The manual for the OptiView says that it can be downloaded for free on FlukeNetworks.com but they transferred the Optiview range to NetScout, but they didn't apparently get this software in the acquisition, but Fluke purged these archives because they became the IP of NetScout. It's a real shame.If anybody has an Optiview SIII with that file on it (opvwna-v3.exe) or even the program itself, please write me and I will be sure to make it worth your while!Thank you!Marton

author: narcisso
author_rank: Newbie
timestamp: June 08, 2022, 04:34:51 pm
content: Hi, you've probably got the software, but if not, I can give it to you. Ivan B.

author: JLClark
author_rank: Newbie
timestamp: June 28, 2022, 02:16:00 am
content: Would you happen by chance to have a copy of the Optiview WAN and/or Optiview Workgroup Analyzer software?

author: user567876
author_rank: Newbie
timestamp: March 22, 2023, 12:43:15 am
content: Hello, did you happen to find a copy of the software? I got a unit but the HDD was missing :/

author: GordB
author_rank: Newbie
timestamp: May 13, 2024, 05:26:47 pm
content: Hello!I'd be very interested to get any of the installation files for the Optivew Series III from you. I would probably make a point of paying it forward to anyone else.CheersGord
Tektronix vertical signal output - Page 1
Forum section: electronics / testgear

author: mike zias
author_rank: Newbie
timestamp: May 13, 2024, 10:50:08 pm
content: I have a 7623A scope and trying to use the vertical signal output on the back panel in the fashion of using the old 1A1 preamp.I find the output is attenuated - dividing the input on the vertical plug in by 2. Is that normal? I have seen a spec for another scope as 0.5 v perdivision with 1 meg load.. I don't understand that spec.What division are they referencing? How does that account for the 2:1 division?

author: srb1954
author_rank: Super Contributor
timestamp: May 14, 2024, 12:59:42 am
content: Quote from: mike zias on May 13, 2024, 10:50:08 pmPer displayed division on the CRT.Where the vertical signal out is picked off the voltage swing has been normalised to suit the deflection inputs sensitivity of the CRT amplifier. So the signal levels here are a fixed range relating the the full scale CRT deflection range

author: David Hess
author_rank: Super Contributor
timestamp: May 14, 2024, 01:10:30 am
content: The vertical output should be 25 millivolts into division into 50 ohms and 0.5 volts per division into 1 megohm. The divisions are vertical divisions shown on the CRT graticule.
Test Level voltage for leakage inductance measurement? - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: May 13, 2024, 08:12:42 pm
content: Hi,We are using Hameg HM8118 LCR meter to measure leakage indiuctance of a ferrite transformer.The primary is about 60uH and the leakage , we know, will be around 300nH or so.What test level voltage would you set for this?The manual doesnt enlighten much on this.HM8118 manualhttps://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_manuals/gb_1/h/hm8118_1/HM8118_UserManual_de_en_06.pdfConsidering Power Integrations report DER243 (page 18 of below) ....When measuring SMPS transformer inductance and leakage inductance, they use 0.4V at 100kHz.But surely a test voltage of 1V would give more accuracy?DER243 (page 18)https://www.power.com/sites/default/files/documents/der243.pdf10:30 of the below discusses measurement voltage level setting...but goes on about the voltage across the component in the application..but clearly, Power Integrations set 0.4V as the Test level voltage when measuring primary inductance....but that coil sees some 330V in the circuit as its the primary of an offline flyback...so clearly transformer manufacturers do not base the Test Level voltage on the voltage seen in the application....https://youtu.be/vi9t5gdog7QSo do you agree, the higher the Test Level set, the more is the accuracy?

author: thm_w
author_rank: Super Contributor
timestamp: May 13, 2024, 09:52:12 pm
content: Can you measure at 0.4V 1.0V and 1.5V on the HM8118 and let us know the result?HM8118 seems only specified at 1.0V and SLOW measurement range in that datasheet. So I would use that.Its not clear how much better or worse the other ranges would be. But yes generally higher test voltage is more accurate for LCR meter. When you are measuring in circuit you might not want that.
Asynchronous Data Acquisition package for Siglent oscilloscopes - Page 1
Forum section: electronics / testgear

author: kvd
author_rank: Contributor
timestamp: May 13, 2024, 08:44:22 pm
content: Hi,I recently published a general asynchronous data acquisition package for use in Python. It is a brand independent package, but has drivers and several examples for use on Siglent SDS1000 and SDS2000 oscilloscopes. The examples include- live FFT display (up to 55 frames per second)- live Total Harmonic Distortion calculation and peak display in FFT- oscilloscope viewOther applications or drivers for different equipment can be built using the package.The source for the package and the examples, as well as some screen recordings of the aforementioned examples are published on github:https://github.com/kvdijken/pydatacq/tree/v0.2.0The package can be installed from pypi with "python3 -m pip install pydatacq". Wheel is available (without the examples) and sdist (with examples).Have fun, and let me know if you have questions/remarks,Ciao, Koen
Option 2 not installed on an option 2 DM502A? - Page 1
Forum section: electronics / testgear

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: May 13, 2024, 04:43:44 am
content: Hi, I have two DM502As that supposedly have option 2 installed as per the sticker on top.The issue is that the circuits meant to be omitted in option 2 are not omitted, it seems. U1004, CR1101, R1103, and other surrounding components that should have been omitted are there!So I am wondering, can I buy a P6601 and use it with my DM502A and not worry about my DM502As not supporting the temperature measure option?Thanks

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: May 13, 2024, 04:59:03 am
content: So it looks like I can indeed use a standard PT100 temperature probe. If I put 110 ohms across the lemo connector, the meter says 25 degrees celsius. That aligns with the PT100 chart so I think I can make a DIY probe with a PT100 module and a LEMO connector.