hybridfree/eevblog-posts huggingface dataset:
Current Clamp - Page 1
Forum section: electronics / testgear

author: monika
author_rank: Newbie
timestamp: July 18, 2024, 07:53:27 pm
content: Hi,I have a RS PRO RS CP-09 Current Clamp which is supposed to measure 0-200A with an Output signal of 1mV/A.I have it connected to the voltage pins of a Fluke 115 multimeter and when clamped around a mains cable carrying around 10A, I don't get any any reading on the multimeter. I have it set to the mV range.Does anyone have any ideas why? Could this be a faulty unit?Thanks

author: Martin72
author_rank: Super Contributor
timestamp: July 18, 2024, 08:08:28 pm
content: Hi,What did you set on the Fluke115, ac or dc mV?

author: Gyro
author_rank: Super Contributor
timestamp: July 18, 2024, 08:09:23 pm
content: You need to be able to split out the individual cores of the mains cable, otherwise the current flowing through the Live wire and back through the Neutral wire cancel each other out, resulting in a zero reading.

author: TomKatt
author_rank: Frequent Contributor
timestamp: July 18, 2024, 08:11:25 pm
content: Quote from: Gyro on July 18, 2024, 08:09:23 pmThis is probably the issue - are you clamping around a power cord that has multiple conductors inside? You need to clamp around a single conductor.Or use an AC adapter to split them out:https://www.amazon.com/Line-Splitter-Klein-Tools-69409/dp/B01B7RTNSO

author: Phil1977
author_rank: Frequent Contributor
timestamp: July 18, 2024, 08:13:32 pm
content: I assume you have set your multimeter to mV AC and that you are probing a single mains wire, not a mains cable with L and N.Then I would check the banana plugs. Set the Fluke to resistance measurement, if you see nothing attached then probably the safety plugs are so safe that they don't make any contact at all. This is not so rare that safety plugs and safety jacks of different suppliers have problems.

author: monika
author_rank: Newbie
timestamp: July 19, 2024, 08:24:18 pm
content: Hi,Sorry should have said in my original post that these are individual cores and not a multicore cableI did find the solution in that it appears it was the multimeter sockets after all. Despite trying another multimeter, I still had the same problem which led me to believe that it was a problem with the clamp alas it looks like an issue with the design of the sockets both were Fluke!!Thanks all for your replies
TDS5104 owners - Page 1
Forum section: electronics / testgear

author: ivi_yak
author_rank: Regular Contributor
timestamp: July 19, 2024, 04:21:53 pm
content: closed

author: coromonadalix
author_rank: Super Contributor
timestamp: July 19, 2024, 05:46:24 pm
content: dont start multiple threads, you have asked here :https://www.eevblog.com/forum/repair/tektronix-tds5054b-record-length/
Help repairing TMK GR-2100 - Page 1
Forum section: electronics / testgear

author: Cesar_D
author_rank: Newbie
timestamp: November 09, 2023, 11:20:27 pm
content: Hello!I bought a DMM TMK GR-2100 in "non-functional" condition but with good aesthetic appearance.I can see some burnt traces and the intention to repair them (barely with green insulated wires) and a missing contact on the switch rotorWith new batteries it does not turn on and Q2 (marked as "A720") heat up, I want to repair it but I don't have the user manual or schematicsI will apreciate any helpThanks, Cesar

author: Cesar_D
author_rank: Newbie
timestamp: December 20, 2023, 11:44:54 pm
content: Hi!I have made progress on the subject, thanks to Jordi A. who sent me the technical documentation (https://equiposdetest.foroactivo.com/t109-archivo-de-esquemas-o-manuales-de-instrumentos-de-medida-electrica), I have been able to better analyze the circuit and found several damaged elements, especially transistors (Q1, Q2 and Q3), IC (U1, U2 and U4), diodes and zeners (VR1, VR2, VR3, CR2 and CR6) and a tantalum capacitor (C17). I am waiting for the spare parts to be able to reassemble it and continue the diagnosis.I attach the file that Jordi A sent me (PDF, thank you very much Jordi!), the reconstruction of the schematic to make it more readable, BOM, some corrections that I have been making to the notes and a photo of the foulty elements

author: Cesar_D
author_rank: Newbie
timestamp: July 24, 2024, 10:27:25 pm
content: After a long hiatus I finally finished replacing the damaged components and the DMM came back to life!
Good for a laugh, the top 5 Aliexpress scopes of 2024 - Page 1
Forum section: electronics / testgear

author: pcprogrammer
author_rank: Super Contributor
timestamp: July 20, 2024, 06:15:54 am
content: The runner up is the FNIRSI 1013D.

author: Aldo22
author_rank: Super Contributor
timestamp: July 20, 2024, 09:12:34 am
content: Phew, I'm lucky I didn't buy the Rigol.It can't even handle a bandwidth of 100MHz - 349 MHz like my Hantek can.

author: pcprogrammer
author_rank: Super Contributor
timestamp: July 20, 2024, 09:17:24 am
content: Quote from: Aldo22 on July 20, 2024, 09:12:34 amLike I wrote in the title, good for a laugh.

author: Martin72
author_rank: Super Contributor
timestamp: July 20, 2024, 09:53:26 am
content: "For Professionals"If someone were to actually develop with the scopes mentioned, that would explain a lot of things in retrospect.

author: nctnico
author_rank: Super Contributor
timestamp: July 20, 2024, 09:56:53 am
content: Notice how those top 5 videos are put together by AI ! You can find many similar videos on Youtube for all kinds of stuff and they only re-iterate the manufacturer's marketing wank. There is zero original content / actual hands-on use in those videos.

author: Aldo22
author_rank: Super Contributor
timestamp: July 20, 2024, 10:10:29 am
content: Quote from: nctnico on July 20, 2024, 09:56:53 amWell, the manufacturers don't claim 349MHz BW.The AI found that out all by itself.

author: Atlan
author_rank: Frequent Contributor
timestamp: July 21, 2024, 06:14:01 am
content: She is not even able to choose the transformation to the other side of the equation.

author: TurboTom
author_rank: Super Contributor
timestamp: July 21, 2024, 09:51:22 am
content: I always wanted to know how "GSa/s" is to be pronounced properly. Now I know

author: DaneLaw
author_rank: Frequent Contributor
timestamp: July 21, 2024, 02:10:53 pm
content: The only thing this has to do with Aliexpress is the affiliate links, there are no competence behind it-- Its often AI constructed, in the hope that some clueless character clicks any of the links, and the channel holder (who often has hundreds of such automated YT-channels) can piggybackride people's wallets, and coin up if anybody purchase anything.The best thing you can do is to ignore it and don't give it any obs, unless you want Youtube to be flooded with more of this video garbage.It's the same for Amazon with many thousands of such videos..
ROHDE SCHWARZ - SFU - Error - Page 1
Forum section: electronics / testgear

author: OliverWirthg
author_rank: Contributor
timestamp: July 16, 2024, 08:08:28 am
content: Hi everyone!My R&S SFU reports an error: "Synchronization error on reference PLL - please check ext. reference connection". In the HW settings it is set to: Reference -> Internal (10 MHz). I measured at the "Ref Freq Out" connector, it seems that the reference signal is present. I switched the HW setup to an external signal and connected the signal from the stable generator to the "Ref Freq In" connector. The error was still present. Anyone have any idea what's wrong?Is it possible to get service documentation for these instruments or is it an R&S secret?Thank you all!

author: OliverWirthg
author_rank: Contributor
timestamp: July 17, 2024, 07:35:26 am
content: In addition, would anyone be able to advise how the diagnostic data can be verified according to Fig.? For some of them the voltage values are listed but not for most of them. Is there any document for verification?
Documentation for AWG based on AD9106 - Page 1
Forum section: electronics / testgear

author: Lathe26
author_rank: Contributor
timestamp: December 11, 2023, 01:58:23 am
content: There is a bare-bones AWG from China that is based on the Analog DevicesAD9106.It's available on Aliexpress and eBay, but does not appear to have a product name. To find it, search these sites for "AD9106".The existing documentation for the AWG is limited. Thus, I created more detailed documentation for this AWG and posted it on Github athttps://github.com/Lathe26/AD9106_AWG/tree/master. Hopefully, this will give other folks a better idea of what this AWG can do, it's limitations, and to a lesser extend what the AD9106 chip can do.Feedback is welcome.

author: Lathe26
author_rank: Contributor
timestamp: December 21, 2023, 06:11:04 am
content: Updates:USB protocol documentedTool created to issue commands and send arbitrary data, calledawg_ad9106.py

author: jbb
author_rank: Super Contributor
timestamp: July 17, 2024, 10:21:07 pm
content: Thanks for that great write-up of the AD9106 AWG boards. It's helped clarify a few things for me, thanks.I have a couple of follow-up questions which I hope you can help me with...Q1: you have an example of "SRAM factory waveform 0 AM modulation of 1MHz sine wave", which is a feature I'm interested in. Do you know if you can configure the device to do this continuously without pauses?Q2: have you seen any references to "CH1_ADD" or "CH2_ADD" register bits in the interface? (They are part of the AD9106 register file but I don't know if themodulesupports them.)
Exporting persistence waveforms on HP 54542A or Agilent DSO1002A - Page 1
Forum section: electronics / testgear

author: PerArdua
author_rank: Regular Contributor
timestamp: July 17, 2024, 09:52:54 pm
content: Hi,I'm performing an experiment which requires sampling a 'glitching' signal - appearing semi regularly at different time intervals with respect to my trigger. I am trying to identify particular time intervals where this glitch occurs, as well as the amplitude response of this glitch.In order to do this, I have been employing the persistence function on my scopes. This works well for monitoring the experiment, but I would like to perform further analysis on my PC - such as fitting curves to the glitch's envelope.However, I cannot find a way to export the persistence waveform as something with attributable voltage/time data - only in an image file. I have also tried looking at using math functions, and exporting that, but no matter what I try, the only thing I can export is a single waveform from the channel.I can see how exporting pixels saves on memory - rather than supporting a screen's worth of voltage/time points. But that doesn't help me in this case.I am considering hooking up my 54542A through GPIB, and using a PC script to form the persistence data - taking each waveform through GPIB. Before I try that, can anyone suggest a practical way of exporting the persistence waveform/envelope/max values from either of these instruments?
Please Help Identify this IC - Page 1
Forum section: electronics / testgear

author: Jack Lions
author_rank: Newbie
timestamp: July 16, 2024, 11:44:28 pm
content: I've looked all over the web and through many books trying to find this. Any help will be greatly appreciated. It's roughly 4 mm x 3 mm.

author: wraper
author_rank: Unknown
timestamp: July 17, 2024, 12:05:43 am
content: HCPL-0630 optocoupler

author: Jack Lions
author_rank: Newbie
timestamp: July 17, 2024, 01:11:46 am
content: Thank you for the reply. I looked at the data sheet for HCPL-0630 optocoupler, however I can't find any reference for 644. Do you know what that represents?

author: wraper
author_rank: Unknown
timestamp: July 17, 2024, 01:30:05 am
content: Some date/lot code. Nothing useful other than for parts tracing in production.

author: Uup
author_rank: Regular Contributor
timestamp: July 17, 2024, 07:24:35 am
content: Its meaning is shown in the datasheet, if you look again.

author: Jack Lions
author_rank: Newbie
timestamp: July 17, 2024, 07:49:23 am
content: Thank you!

author: Jack Lions
author_rank: Newbie
timestamp: July 17, 2024, 07:51:47 am
content: Thank you for the reply. Pardon my ignorance, I was looking for 3 digit combinations. ie xxx xxx

author: wraper
author_rank: Unknown
timestamp: July 17, 2024, 09:48:34 am
content: Quote from: Uup on July 17, 2024, 07:24:35 amIt's shown for different larger package. Also parts that were produced more recently have somewhat different marking.

author: wraper
author_rank: Unknown
timestamp: July 17, 2024, 09:55:12 am
content: Found it in older datasheet

author: Jack Lions
author_rank: Newbie
timestamp: July 17, 2024, 12:18:45 pm
content: Thank you! This is very helpful.
Using Kingst LA series Logic Analyzer's SDK - Page 1
Forum section: electronics / testgear

author: Annamalai
author_rank: Newbie
timestamp: July 17, 2024, 07:35:04 am
content: Have anyone used the SDK provided by Kingst LA for developing custom protocol analyzers ? I'm trying to make one but as soon as I add and play in the GUI It just gets "hanged with a grey circle" and doesn't play the simulated data unlike for other built-in protocols like I2C, SPI. I don't know why it doesn't work. The only source which I have is the 45 page SDK docs which I've grinded many times and checked my code with it. Also I couldn't get the whole workflow of how it works from the docs.

author: voltsandjolts
author_rank: Unknown
timestamp: July 17, 2024, 08:17:56 am
content: Maybe this example can be helpful:https://github.com/Ryzee119/LPCAnalyzer

author: Annamalai
author_rank: Newbie
timestamp: July 17, 2024, 09:21:08 am
content: I also have referred that as well and even have opened a issue there
Advantest R6142 diagnosing for no power up - Page 1
Forum section: electronics / testgear

author: ShmoeMo
author_rank: Newbie
timestamp: July 17, 2024, 02:23:41 am
content: G'day guys.I recently got my hands on an Advantest R6142 Voltage/Current Generator.It is rough and has come corrosion on resistors and legs but i have tried my best to clean it off and check the effected components to make sure there are no breaks in connections and they are still reading specified values and there are no shorts.It however does not power up correctly. Sometimes when i power it up i get nothing but a click and sometimes i get a click and some random character or segment on the readout or mode light, some of the button lights come on and it just cycles through that flashing on and off until i power it off. Pressing buttons does nothing.I have been through the troubleshooting steps (Stated in service manual for no power up) and gotten to the point of checking for high and low signals between TP2 (GND) and pins 30-37 of U1 (HD63B03) It specifically asks "Does the voltage change from high to low at pins 30 to 37 of U1 when the circuit between pin 1 and TP2 (GND) of U11 (TL7700) is jumpered and then it is opened" When running this test my idle voltage is around 3.3 -3.7 v on these pins (depending which pin I'm on) and when I close the connection between GND and pin 1 of U11 the voltages on all pins comes to 4.8v then back to 3.whatever but never sees a "Low" signal. If the test results are incorrect it says to "Check, U1, U3, U4, U6 - U10, U33 - U35, U38 and U46". This is where I am stuck as I have no idea what I'm looking for on these mentioned chips.I have attached the service manual below and the trouble shooting section I'm following is 6.3 - 6.6.If anyone could help me out here it would be greatly appreciated.If you would rather chat on discord to avoid spamming the reply's i do have that as well and am quite active on it. If we can reach a solution i will be sure to come back and update the post.
Rohde and Schwarz Spectrum FSEK30 image disk - Page 1
Forum section: electronics / testgear

author: Tardz
author_rank: Newbie
timestamp: September 08, 2022, 05:16:13 am
content: Hi, I was able to get a spectrum analyzer, a R&S FSEK30 20Hz-40GHz.The problem is that the data on the hard disk is corrupted, and when powering on, all the initialization by BIOS and preliminary tests work (no display errors). But after the initialization of the hard disk, a message appears "SELFTEST DONE", "SYSTEM IS BOOTING" and everything stops, it does not go further, only the cursor is active (animation).I could check that the hard disk is functional, since it is detected when I put it on a PC (IDE port).I was able to make a copy of some files, only, for the rest, there are too many errors on the disk and I can't correct them.What I need is a disk image of a working system or a link to download what I need to fix this problem.This spectrum has BIOS 2.1.Yves

author: g7kbr67
author_rank: Regular Contributor
timestamp: July 18, 2024, 09:28:00 am
content: HiDid you ever find a link to the operating system for this unit?RegardsPaul

author: Harry_22
author_rank: Frequent Contributor
timestamp: July 19, 2024, 08:56:15 am
content: Hi!Try this image.https://groups.io/g/Rohde-and-Schwarz/files/DOS_RMX.rdr
Tiny SA / Nano VNA - Page 1
Forum section: electronics / testgear

author: Glenn0010
author_rank: Regular Contributor
timestamp: July 12, 2024, 09:07:42 am
content: I'm looking at the Nano VNA / Tiny SA. I've had a quick look but can't quite find the information I need.Ideally, I'd like to generate curves of Impedance vs frequency of components. I had a look and can't quite find anywhere where it clearly say this. Does it have this feature built in ? If not could the s parameter curves be exported and then transformed to impedance curves?Best Regards,Glenn

author: ftg
author_rank: Frequent Contributor
timestamp: July 12, 2024, 09:18:53 am
content: TinySA will not do that, it being a spectrum analyzer.The software on most NanoVNA's reactance vs. frequency, which sounds like what you are after.PC side tooling like NanoVNA-saver and vna-qt do allow saving the S-parameter files for later analysis if that is required.It can also plot the S11 in the formats in the attachent.

author: Glenn0010
author_rank: Regular Contributor
timestamp: July 12, 2024, 09:25:36 am
content: Thanks FTG, Yes Ideally I'd like to measure impedance of the individual components, but also, look at the transfer functions of filters, for the second point I'm not sure it will work on this as it might not have enough ports.

author: ftg
author_rank: Frequent Contributor
timestamp: July 12, 2024, 10:19:01 am
content: NanoVNA and LiteVNA are perfectly usable for measuring filters. They are 1.5port devices.One proper VNA transmitter port and one receive only port.So in addition to S11, S21 can be measured, but S22 cannot, as there is not transmitter in port 2.Folks over at the RF and microwaves subforum measure filters with them all the time.And so do I.

author: ch_scr
author_rank: Frequent Contributor
timestamp: July 12, 2024, 10:56:41 am
content: You can take the measurements one after another on a e.g. diplexer with the other port terminated.Depending on the number of ports (e.g. Triplexer) and measurements (only through or isolation as well) you need, it's a lot of connections to make, though.Still fine to get started. You'd need to use the PC software to save and overlay the files to get the "complete view".

author: points2
author_rank: Regular Contributor
timestamp: July 15, 2024, 10:17:56 pm
content: Quote from: Glenn0010 on July 12, 2024, 09:25:36 amhi Glenn0010,given that you replied that way...... it looks to me that you have no clue about VNAs & their features.you said :"to measure impedance of the individual components"OK => VNA can do thatyou said :"look at the transfer functions of filters"...oups !?you're dreaming or I miss smth ?you said :"I'm not sure it will work on this as it might not have enough ports"hum... "not enough ports" vs 2 ports ?do you need 3-4 ports ? if so, please explain
LeCroy WavePro 7K (7100A, 7200A, 7300A, DDA3000) - printer asks for activation? - Page 1
Forum section: electronics / testgear

author: dmderev
author_rank: Contributor
timestamp: July 08, 2024, 06:09:03 am
content: Recently I reinstalled the software (XStream) and drivers on WavePro 7200A, all works fine.But I was curious how the integrated (thermal) printer works.At the first glance, the installer added Amyuni Document Converter 400 printer (under the name "LeCroy document Converter") but the attempt to print test page pops the message: Activation Error: Printer not activated, error code -30.I am not sure what it is, and also how to install the integrated printer's driver? What is the model?The printer is connected to LeCroy's PCI controller, so it is not clear if there is a hidden printer port?Thanks!

author: squadchannel
author_rank: Frequent Contributor
timestamp: July 15, 2024, 03:14:50 am
content: Quote from: Steven_S on July 15, 2024, 02:22:58 amAlternative solutions? Spam?How rude of dmderev to promote his own company when he wants a solution.Can you replace it without modification? Are you making the exact same thing? If you are selling a "receipt printer", you are misguided.Perhaps "activation" means "initialization". I think, lecroy's printer even if recognized as a common printer, cannot print with generic software because of non-standard initialization and other commands. Perhaps it will only work with the lecroy software on the 7200A.The printer is probably modular and connected via USB.It is possible to disassemble the printer module and find the solution from the chip inside, or from the USB VID/PID. Maybe it will work if you change the driver?

author: DaJMasta
author_rank: Super Contributor
timestamp: July 15, 2024, 05:02:54 pm
content: I don't currently have a WP 7k series, but I've worked with and in several including some with and without printers. I seem to remember swapping a printer into one from another unit with no ill effects on either - I think if the power and data cables to the printer are connected and the drivers are correctly installed, there should be no option key or anything to enable it, it just shows up in the utilities section of XStream.As there are some oddities to installing XStream, are you running version 8.1.4 or whatever is the most recent one that runs in XP? Did you upgrade from 6.x? Was it a clean install? There is an additional driver package needed for an install of XStream 8.X on XP because the newer version doesn't contain all the Aladdin board drivers - it was available for download separately from LeCroy last time I looked. I remember having issues with the front panel lights and things without it, maybe that's something to look into. Could also be worth making sure all the motherboard drivers are appropriately installed if it was a clean OS install.While again it's been a bit and I don't have one in front of me, I believe the printer shows up as a "LeCroy Printer" in the device manager - at least Amyuni doesn't ring any bells for me.
Iso-Tech IDM 505 problem - Page 1
Forum section: electronics / testgear

author: mattltm
author_rank: Newbie
timestamp: July 13, 2024, 09:50:43 am
content: Sorry! I realise this is in the wrong topic!I've recently been given an Iso-Tech IDM 505 which has a problem. When I turn it on, the device emits a continuous beep and shows "PROBE" on the display. The only setting that works is the A setting which works fine and is measuring current OK.I've tried a reset but nothing has changed.Has anyone come across this before? I have no idea where to start looking!Thanks.

author: mattltm
author_rank: Newbie
timestamp: July 14, 2024, 02:19:23 pm
content: OK. Managed to work this one out for myself. A small reflow job on the probe terminals and it's working fine!
OWON DGE2000 SCPI programming - Page 1
Forum section: electronics / testgear

author: Old Radio Guy
author_rank: Newbie
timestamp: June 20, 2024, 12:47:05 am
content: Hi all,I'm trying to write some python functions to control my OWN DGE2000 arbitrary function generator. The Programmer's manual does not seem to provide any commands to set the output waveform. Can anyone provide some enlightenment?Thanks,Alanhttps://files.owon.com.cn/software/Application/DGE2000_3000_SCPI_Protocol.pdf

author: swt
author_rank: Newbie
timestamp: July 15, 2024, 02:02:03 pm
content: SOUR1:FUNC:SHAP SIN (or SQU, RAMP, PULS, PRN, Heart, GaussPulse, ...)See this doc for a different Owon model:https://files.owon.com.cn/software/Application/XDG_Waveform_Generator_SCPI_Protocol.pdfHope this helps
Equipment for a Radio Frequency Engineer - Page 1
Forum section: electronics / testgear

author: Bill
author_rank: Contributor
timestamp: July 14, 2024, 06:46:23 am
content: Hello everyone,I am currently compiling a list of equipment for projects in radio frequency engineering and would like to get recommendations from experienced professionals in the field. Specifically, I am interested in the test and simulation equipment that you regularly use in your work.Could you please share the tools and devices that you find indispensable? This includes, but is not limited to:-Spectrum analyzers-Signal generators-Vector network analyzers-Oscilloscopes-RF simulation software (Matlab...)Any suggestions, along with your experiences using these pieces of equipment, would be greatly appreciated !

author: EggertEnjoyer123
author_rank: Frequent Contributor
timestamp: July 14, 2024, 06:57:06 am
content: Get a TinySA and LiteVNA first if you're just trying to get your feet wet. Both tools work acceptably well for hobbyists, and aren't expensive. You probably won't be going past 6 GHz anytime soon.The HP 8566 is a great SA once you get past that level (as long as you don't mind potentially having to do repairs). There's not many other 22 GHz spectrum analyzers which can be had for $1000.As for software, all the microwave simulation software is extremely expensive, so I would look into Qucs or QucsStudio, which are both free.I can't say much about everything else - all the equipment is stuff I've fixed from the ewaste or stuff from ham swap meets. If you want to do software defined radio you could get a RTL-SDR or HackRF.
KUNKIN KP184 DISPLAY - Page 1
Forum section: electronics / testgear

author: EugenioDC
author_rank: Newbie
timestamp: July 14, 2024, 08:33:04 pm
content: I bought a Kunkin Kp184 active load,It works fine but has a very little problemIn the right part of the display the caracters are slightly cut, perhaps an internal mask shiftedDoes anyone know how to align this?ThanksYou can see the B of battery truncated left and the left part of CC truncated a little
Spectrum analyzer selection - Siglent SSA3021X Plus Vs  8560E with TG - Page 1
Forum section: electronics / testgear

author: suspension
author_rank: Regular Contributor
timestamp: July 14, 2024, 12:29:26 pm
content: HelloI need to select a spectrum analyzer. My main requirement is to test a arbitrary signal generator with 500MHz max bandwidth but eventually other general uses as well.Current options considered are Siglent SSA3021X Plus hacked to SVA1032X vs used 8560E with TG. First one costs 1650USD while second costs close to 1100USD.Like to hear some feedback!Thanks

author: G0HZU
author_rank: Super Contributor
timestamp: July 14, 2024, 12:55:37 pm
content: In terms of the traditional performance measures of a spectrum analyser (input IP3 and IP2, input VSWR, phase noise, overall measurement uncertainty and spurious free dynamic range) there is only one winner despite the >25 year age gap. The 8560E is going to easily outperform the Siglent analyser in this respect.However, the Siglent analyser offers lots of modern features and it also has a digital IF and a really nice and large display screen.The digital IF will offer much improved log accuracy compared to the older 8560E when the 8560E is used on wider RBW settings. The 8560E only offers digital RBW on the narrower RBW settings.I've only used the TG with the A version of the HP 8560 and it was fairly grim to use. The tracking performance is not great because the tracking gen source is not accurately locked to the rest of the analyser's synthesiser. So it can drift and cause tracking errors on narrow RBW settings. Maybe the TG with the 8560E is better?Many people will prefer (and be happier with) the Siglent analyser, especially if the aim is to use the tracking generator a lot on narrow span settings.So it really is up to you to decide which is best for you.
NEW Siglent SDG1032X for $250 (Warning) - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: July 12, 2024, 06:13:21 pm
content: I am parsimonious when it comes to money (read cheap). So I looked for the best price for an SDG 1032x and found them for $250 on Ali Exp shipped from the USA.I have purchased Nikon equip from Canada (Henry's) to take advantage of the exchange rate AFTER verifying NikonUSA will service them and does not consider authorized sales from Canada to be out of region or gray market. FWIW, the two things are distinctions with a difference. For example, Adorama used to offer new equipment that was 15% reduced from NikonUSA equip, that discounted stuff was purchased overseas and Adorama was actually the second sale. Nikon International looked the other way because it increased the stock shipped from the manufacturing facility and looked good. They knew full well which dealers were selling more stuff than their region supported.So I looked up the warranty offered by Siglent. No restrictions on region of sale. Very reasonable.BUT, third party sales (read true gray market) in which the item is sold "as new" from a non authorized outlet results in the warranty start date not being the day for "first use"; but the date of first sale (to the reseller). Of course, this date is unknown to the buyer and that instrument may have been in the seller inventory for over a year.I ran into this in a "new" car we purchased a couple years ago. Mileage under 500 miles. Found out when the warranty was denied at another dealer because the original dealer had registered it and therefore it was not considered as new when sold.Take home lessons:Just get it from SaeligAnd always require a dealer attest in writing that your new car is in fact "first use". There is a business advantage to the dealer for doing what he did, but that sale was illegal and he got into all sorts of trouble with the brand, regional sales and DMV. But it was not worth our trouble.Regards,Dewey
I bought an Hantek 6204BC Oscilloscope on AliExpress... - Page 1
Forum section: electronics / testgear

author: Svensen
author_rank: Newbie
timestamp: July 13, 2024, 09:42:50 am
content: After watching a few videos on YT I made the mistake of ordering an Hantek 6204BC USB Oscilloscope from AliExpress, I received it with a broken probe and a loose channel shield.Also it seems like the channel shields on the back side of the PCB are missing, I know there used to be shields on both sides because of one of the mentioned videos. The seller claims it is a new design and that shields on both sides are no longer needed...The shields on my oscilloscope are only attached with solder and the seller also claims there was bad soldering on this particular batch, he is still shipping them and doesn't want to accept a returnIs there anyone here with a scope from the 6000BC series who can confirm that they only have shields on one side now, and that the shields are soldered in place (no screws)?
My Thermocouple Thermometer with datalogger shows invalid measurement or NULL - Page 1
Forum section: electronics / testgear

author: Annamalai
author_rank: Newbie
timestamp: July 11, 2024, 06:49:40 am
content: Hello people, I have a Thermocouple Thermometer with Data logger (THE-373 K/J Datalogger Thermocouple Thermometer) which I use to measure the temperature of RF amplifier by pasting the probes on the amplifier case with a tape which works perfectly but as soon as I connect it to a PC with a microUSB cable for Real time Data acquisition it starts showing very high measurement values instead of usual 45-50 deg C it goes to 300, 400 deg C and then to NULL.This happens when "both microUSB cable and RF amplifier is powered and working", but if any of those aren't there for e.g. without micro USB cable it properly shows temperature of RF amplifier (with power ON) and vice versa case with USB cable but with RF amplifier power off then too it works. I couldn't figure why does it behaves like this.User Manual of the Thermometer :https://cd50.net/wp-content/uploads/2023/07/37_E.pdf

author: darkspr1te
author_rank: Frequent Contributor
timestamp: July 11, 2024, 06:58:33 am
content: You might need to 'electrically' isolate the probe from the amp, it sounds like you are getting leakage down the casing of the probe.if you have any heat transfer pads that might workdarkspr1te

author: BeBuLamar
author_rank: Super Contributor
timestamp: July 11, 2024, 11:04:23 am
content: Generally if the thermocouple is broken it would read as very high temperature. I don't know if NULL mean broken thermocouple or not.

author: HKJ
author_rank: Super Contributor
timestamp: July 11, 2024, 12:20:39 pm
content: Quote from: Annamalai on July 11, 2024, 06:49:40 amPut a bit of tape under the probe.Thermocouple probes are usually galvanic connected, using a DMM with PC connection to measure the thermocouple will also work (DMM PC connections are galvanic isolated).

author: Ian.M
author_rank: Super Contributor
timestamp: July 11, 2024, 02:14:08 pm
content: Quote from: HKJ on July 11, 2024, 12:20:39 pm*THIN* tape with good thermal conductivity. If you have any Kapton tape handy try that.You could also try a USB isolator to break the ground loop.

author: Annamalai
author_rank: Newbie
timestamp: July 12, 2024, 05:27:54 am
content: Quote from: Ian.M on July 11, 2024, 02:14:08 pmCurrently I have used a very thin paper tape underneath the probe which works but reduces the accuracy by ~ 0.5 to 1 deg C. USB Isolators also seems good which I think won't compromise that.Thanks everyone for their replies.
Tenma 72-960 LCR meter calibration? - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: July 05, 2024, 07:29:23 pm
content: Hi,We have a Tenma 72-960.Do you know how to calibrate it for inductance measurement?, ie, the open and short cal?https://datasheet.octopart.com/72-960-Tenma-datasheet-20064.pdf

author: nctnico
author_rank: Super Contributor
timestamp: July 05, 2024, 07:30:34 pm
content: That is described in the manual. Look for the user manual

author: coromonadalix
author_rank: Super Contributor
timestamp: July 05, 2024, 07:42:38 pm
content: i think B&K 878 LCR Meter is the other same model

author: Faringdon
author_rank: Super Contributor
timestamp: July 07, 2024, 12:43:48 pm
content: Thanks for the B&K 878 tip-offhttps://www.manualslib.com/manual/1235175/Bk-Precision-878b.html?page=87#manual...ill take a closer look , not now, the internet at M25 Cobham Services is hideously slow.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 08, 2024, 01:51:03 am
content: manual attached

author: Faringdon
author_rank: Super Contributor
timestamp: July 11, 2024, 05:57:11 am
content: Thanks, so it seems that sometimes it diplays "opn", and then you have to open the test leads and then press "cal"...then sometimes it displays "srt", and you then short the test leads and press cal.But it never seems to offer me "opn" or "srt".How do we get it to offer this?
ESI DEKASTAT 5 PACK - Page 1
Forum section: electronics / testgear

author: NANOJOLTS
author_rank: Contributor
timestamp: July 11, 2024, 12:44:41 am
content: Hey, just something I picked up the other day. So far I spotted the nice DS1463 write up on the net.ESI Dekastat DS1463 5 independent units on one panel. With some fiddling each unit can be set very close to 10K Ohms.I wonder what it's main use was? POTENTIOMETER PANEL. Any ideas for a modern hook-up?
Fuses for the Triplett MM525(UNI-T UT139S) - Page 1
Forum section: electronics / testgear

author: ClifS
author_rank: Newbie
timestamp: July 09, 2024, 01:44:31 am
content: I just received the MM525 (UNI-T UT139S) a couple of days ago as a backup meter. In all respects it seems to suit my purposes. However, before doing much with it, I decided to order some spare fuses, which are the FF 600mA H 600v 6x32mm and the 10A H 600v 6x25mm. First one is common as dirt, but that 6x25mm 10A seems to be a rare bird. Word from Triplett is "you can find them anywhere on Amazon or Ebay". Not.Any thoughts on where i might source these? Otherwise the DMM is going back.Thanks for your help.Clif

author: 44kgk1lkf6u
author_rank: Regular Contributor
timestamp: July 09, 2024, 03:09:14 am
content: A quick search only gave me this one listing on Ebay for $21.74.https://www.ebay.com/itm/395361050818McMaster-Carr only lists 8AG size fuses with a 250V voltage rating. But it says, "Don't see the fuse you need? Just tell us what you're looking for and we'll get it for you." I would be interested in seeing what they can find.

author: myf
author_rank: Regular Contributor
timestamp: July 09, 2024, 05:27:39 pm
content: Hi,I also found this fuse with the main properties : 5x : 6mm x 32mm, FF10A 10A 600Vhttps://fr.aliexpress.com/item/664820789.html

author: stj
author_rank: Super Contributor
timestamp: July 10, 2024, 01:40:59 am
content: if the pcb lets you move the clips then use a 32mm fuse,otherwise the 25mm fuse is a standard u.k. plug fuse that is *very* cheap, but it's not FF type speedhttps://uk.rs-online.com/web/p/cartridge-fuses/0412598notice the maker is American - so you should be able to find a distributor

author: ClifS
author_rank: Newbie
timestamp: July 10, 2024, 01:02:34 pm
content: Thanks all.
Keysight E36731A Battery Emulator alternative - Page 1
Forum section: electronics / testgear

author: lutkeveld
author_rank: Regular Contributor
timestamp: July 09, 2024, 02:19:39 pm
content: Hi all. Im building a testfixture for validation of a PCBA with a battery input and onboard charging circuit.To do this I am looking for some sort of bipolar PSU which can simulate a battery input.I have found the Keysight E36731A, which is really nice, but has a less nice pricetag of 5K USD.Do any of you have recommendations for some cheaper (Chinese?) alternatives?I need to simulate a 12V lead acid battery (so ~10.5 to 13.8V, 3A).

author: nctnico
author_rank: Super Contributor
timestamp: July 09, 2024, 04:21:48 pm
content: Look at the Agilent 66311B and related models. Should be close to your needs with some remote control

author: jc101
author_rank: Frequent Contributor
timestamp: July 09, 2024, 04:30:19 pm
content: Quote from: lutkeveld on July 09, 2024, 02:19:39 pmThe battery emulation doesn't work without a BenchVue licence, rented by the year or buying a permanent licence for ~2k on top of the instrument price.It is a nice unit, but crippled by a licence to actually use the thing.

author: lutkeveld
author_rank: Regular Contributor
timestamp: July 09, 2024, 08:27:05 pm
content: Quote from: nctnico on July 09, 2024, 04:21:48 pmAlso a good option and slightly more affordable, but I was hoping more in the 500-1000 EUR range.Maybe this is not realistic, but I was thinking that logically it is just a power supply that can also sink currentMaybe it's more complicated than that

author: nctnico
author_rank: Super Contributor
timestamp: July 09, 2024, 09:08:53 pm
content: The 66311B can be bought cheap on the used market. I paid $50 for mine from Ebay. You should be able to get one with warranty from a test equipment dealer for a good price. Instrumex has one listed for 1250 euro.There is also the Gw instek gpp4000 series which can source / sink but I don't know whether it can do 2 quadrant operation.

author: thm_w
author_rank: Super Contributor
timestamp: July 09, 2024, 09:21:27 pm
content: Quote from: lutkeveld on July 09, 2024, 08:27:05 pmA working 66311B can be had used for $200-500.There is nothing in this price range in terms of modern instruments. The closest could be GW Instek PPH-1506D / GPP3610H/ etc. But that would involve your own programming. You could also just get a separate electronic load and PSU, if you are willing to go to that effort. Or some have even used normal PSU's to sink current.Modern stuff:- Keithley 2281S 4k not powerful- NGU201 6k+- NGM200 4k+https://www.eevblog.com/forum/testgear/battery-simulators-ngm202-vs-bcs6401/

author: lutkeveld
author_rank: Regular Contributor
timestamp: July 10, 2024, 09:44:47 am
content: Oh I see the second hand market for these Agilents is big and very affordable indeed. Will try my luck on Ebay! Thanks for the help.
4 wire Kelvin temperature sensor PCB Identification/Modification - Page 1
Forum section: electronics / testgear

author: Kashif khan
author_rank: Contributor
timestamp: July 12, 2024, 02:46:17 am
content: So i have a job from a client and down below is all the information i got from the client to get started with, He has only two pictures of the PCB which i am attaching.Any idea what 4-wire test equipment PCB is this? How to go around this problem. Any lead is appreciated.""""I have a 4-wire thermometer PCB board consisting of a 0.5mA current source and a discrete ADC, using a 400-ohm reference resistor. I need help identifying which resistors to change to increase the current to 1mA and adjust the transconductance accordingly.Circuit Details:- The PCB has one reference resistor (MREF) and two measuring resistors (RX1, RX2).- It operates as a 4-wire system with periodically reversed source currents to compensate for EMFs.- The resistor under test is selected and switched by three DG612DY switches.- Measurements start with the unknown resistor RX1, using a positive current (IP) followed by an equal negative current (IN).- Voltage drops (UX) from these currents are fed into a voltage-to-current (U/I) converter.- The output current from the converter is connected to a 24-bit resolution current ADC, utilizing a combination of dual slope and charge balance principles for enhanced linearity.- Transconductance changes in the U/I converter were made to accommodate different currents.- Measurement currents are selectable between 0.5mA and 1.0mA by switching current sensing resistors.Requirements:- Identify which resistors (value and location) need to be changed to increase the current to 1mA.- Determine which resistors need to be adjusted to change the transconductance for the increased current.- Specify the necessary resistor if a 100-ohm reference resistor is used"""""
Schematics - Page 1
Forum section: electronics / testgear

author: bzadel
author_rank: Newbie
timestamp: July 03, 2024, 11:37:49 pm
content: Hello all,Would anyone have or, know where I can get a schematic for vintage NRI Model 56 Oscilloscope. I've searched the internet with no luck. I'm hoping someone may have one stashed away in their archives!Thank you,Bill

author: elantric
author_rank: Contributor
timestamp: July 10, 2024, 07:53:35 am
content: https://www.worldradiohistory.com/Archive-National-Radio-News/NRN-1955-02-03.pdf
Siglent SDS3000X HD, 12bit, 4GSa/s high definition oscilloscope serie. - Page 1
Forum section: electronics / testgear

author: markus_jlrb
author_rank: Regular Contributor
timestamp: July 10, 2024, 05:36:34 am
content: Dear EEVBlogger,I'm missing more postings concerning the SDS3000X-HD device and hope to gain such a discussionby this posting.Perhaps few owners of this expensive scope exist and that's the reason for the lake of corresponding threads.Hopefully we could share more details and experiences concerning this device in the future - that's what Iwould like to initiate by this posting.Markus

author: rf-loop
author_rank: Super Contributor
timestamp: July 10, 2024, 07:15:30 am
content: here:https://www.eevblog.com/forum/testgear/siglent-sds3000x-hd-and-upgraded-sds1000x-hd/msg5080192/#msg5080192
Does anyone know of any good alternative for Keysight's 14565B software? - Page 1
Forum section: electronics / testgear

author: ZGoode
author_rank: Frequent Contributor
timestamp: July 09, 2024, 01:57:48 am
content: I use a 66321B communication source relatively often, and was looking into software for it. While Keysight's 14565B software looks great, I cannot justify the $2500 price tag on it. Does anyone know of any decent alternatives to the software?
Talk about Philips PM5644 color pattern generator - Page 1
Forum section: electronics / testgear

author: Sainti
author_rank: Newbie
timestamp: July 09, 2024, 03:28:37 pm
content: Hello,Philips PM5644 color pattern generator is the most difficult to find device and I want to find this machine and what is the PM5644 like because I want to buy PM5644 from a reseller. Thank you.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 09, 2024, 04:31:39 pm
content: tryhttps://www.used-line.com/search?search_term=pm5644??

author: axantas
author_rank: Regular Contributor
timestamp: July 09, 2024, 06:57:19 pm
content: You want PAL Plus...I thought, I am the only one, which is after a device like that. Hesitating to add a Fluke 54200 to my collection...

author: Sainti
author_rank: Newbie
timestamp: July 10, 2024, 01:14:35 pm
content: Although Philips PM5644 is actually a TV pattern generator, there are many models of PM5644, such as PM5644G/00, PM5644M/00, PM5644L/00, PM5644/85(PAL Plus), PM5644G/924, etc., which you guys have. Is this or not? Please reply to me.
Anyone have a spare HP 16555-61605 in their parts box/for sale? - Page 1
Forum section: electronics / testgear

author: go4retro
author_rank: Newbie
timestamp: July 06, 2024, 11:45:04 pm
content: Enjoying my 16702A for a few years now, just pulled it apart to remove the runners, turn the 16533 into a 16534, add the PS2 resistors, replace the PSU fans, and clean the insides. While it's apart, I am installing a 3rd 16717a, but the unit arrived without any cables. I have the little butterfly board to board cables, and I've sourced the pod cables, but the unit is missing the little 1.27mm 2x20 cable you use to connect the various units.Nothing showing on eBay, and I've been a lurker here for a long time (great source of information), so I thought I'd see if there was a cable laying around before I go trying to buy a non working (16715A, 16716A, 16717A, 16718A, 16719A, 16740A, 16741A, 16750A/B, 16751A/B, 16752A/B, or 16760A) LA board just for the cable.Jim

author: gslick
author_rank: Frequent Contributor
timestamp: July 07, 2024, 03:43:54 am
content: The 16555-61605 cable is a 2x10 cable, not a 2x20 cable. The ribbon cable is 20 conductor, the connectors are 2 rows of 10.If anyone wanted to try making one of these cables from parts, I believe the connector is a TE Connectivity AMPMODU System 50 111196-4 or 1-111196-8. I'm not sure what the difference is between those two connectors, maybe the 1-111196-8 is the lead-free version.https://www.te.com/en/product-111196-4.htmlhttps://www.te.com/en/product-1-111196-8.html

author: go4retro
author_rank: Newbie
timestamp: July 10, 2024, 12:47:04 am
content: Quote from: gslick on July 07, 2024, 03:43:54 amApologies. I knew that, but was looking at this page when I typed it out:https://4gte.com/products/hp-agilent-16555-61605-ribbon-cable-assy-for-16752x-16760x-2-x-20/and they have it as 2x20.QuoteThe connectors are somewhat pricey, even from Mouser/Digikey, so I thought maybe it makes more sense to just buy the assembly from the above site, but shipping is $24, so I'll try to assemble one from parts.Thanks for the links.
Applicator tube for Loctite activator spray? - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: July 09, 2024, 01:44:18 pm
content: Hi,Anyone know where we can buy an applicator spray tube for Loctite 7649?Its going all lover the place.We are supergluing thermocouples to diodes.https://uk.farnell.com/loctite/7649-150ml/activator-7649-150ml/dp/1370150

author: themadhippy
author_rank: Super Contributor
timestamp: July 09, 2024, 02:02:40 pm
content: poundland, they come with a free tin of wd40

author: Ian.M
author_rank: Super Contributor
timestamp: July 09, 2024, 02:17:42 pm
content: I doubt it will be much more controllable through an applicator tube. For pre-application, spray a little on a watch glass (or other small glass or glazed ceramic dish) and use a cotton Q-tip or a natural bristle artists brush to apply it *exactly* where you need it.

author: jpanhalt
author_rank: Super Contributor
timestamp: July 09, 2024, 02:23:57 pm
content: Don't you already have a thread about using Loctite 7649?https://www.eevblog.com/forum/manufacture/does-superglue-and-activator-damage-components/msg5562365/#msg5562365So far, you seem to have ignored those answers. Why are you using that activator in your application?Also, activators are usually applied like that rather than drenching the adhesive that's been applied. Sometime, you apply a mist or drop, then wipe it off. It doesn't take much.As for getting a tube, buy another spray can of any lubricant and re-purpose the tube that is attached.