hybridfree/eevblog-posts huggingface dataset:
MSO5000 Signal Generator Output Protection? - Page 1
Forum section: electronics / testgear

author: The Doktor
author_rank: Regular Contributor
timestamp: May 17, 2022, 02:03:18 pm
content: Does anyone know if the signal generator on a Rigol MSO5000 will be damaged if the output is shorted? Any reverse power protection? I couldn't find this info in the manual.

author: RoGeorge
author_rank: Super Contributor
timestamp: May 17, 2022, 02:47:25 pm
content: A short at the output of a signal generator, for sure will not damage a generator. By construction, any generator should be able to generate full signal while shorted indefinetly without any damage. In RF this is a frequent situation. The so called 50 ohm impedance output is in fact a series 50 ohms resistor.Not sure what you have in mind when saying reversed power. About pushing power into the output of a signal generator, it depends how much power. If not too much, it might survive.For example, my Rigol DG4202 is auto-disconecting its output when voltage from outside is detected.

author: Wrenches of Death
author_rank: Regular Contributor
timestamp: May 18, 2022, 01:54:11 am
content: Quote from: The Doktor on May 17, 2022, 02:03:18 pmI use the cobbled together gadget in the attached pictures to keep DC from roasting the output attenuator of my signal generators. Inside of the heat shrink sleeve, is a 600 volt ceramic disc .1 uf capacitor connected between the center pin of the male and the center pin of the female coaxial connectors.It's a lot easier and cheaper to use one than to have to rebuild an output attenuator.For AC, you're on your own.WoD

author: epsilon888
author_rank: Newbie
timestamp: July 24, 2022, 10:09:38 pm
content: No problem, the outputs will look into everything between a short circuit and infinite resistance when used as signal generator. Of course it will handle reflected power from it's own outputs.BTW the MSO5000 series are all the same hardware, and very easy to "upgrade" to 350MHz / 4 channels with all options. PM me if interested.
ISO: Economical Data Logging Multi-Meter - Page 1
Forum section: electronics / testgear

author: WA2SQQ
author_rank: Newbie
timestamp: July 21, 2022, 03:31:35 pm
content: I'm looking for an economical replacement for my Radio Shack 22-805 multi meter which cme with data logging software. Looking for a replacement that uses a USB that offers a USB interface, and software that will allow me to set the sample times and duration. Export to an Excel spread sheet would be desired. Everything I'm finding is >$250 US.

author: HKJ
author_rank: Super Contributor
timestamp: July 21, 2022, 04:03:56 pm
content: For software look at TestController:https://lygte-info.dk/project/TestControllerIntro%20UK.htmlIt works with a lot of multimeters and can export to CSV files, but in most cases there is not reason to use Excel, because you can view and process data in the software.Brymen have some multimeters below $250, even with the computer interface (It is always extra).

author: adam4521
author_rank: Regular Contributor
timestamp: July 21, 2022, 04:11:07 pm
content: I think the popular UT-61 (various versions) can do it. If you just need voltage logging you might also want to research standalone daq devices (data loggers) that might be more convenient if you don’t want to tie it to a computer for hours/days. I don’t think this example is that great but it shows what I mean.https://www.measurementsystems.co.uk/docs/mc/USB-503-datasheet.pdfOr make your own solution using Arduino GPIO etc.
Maynuo Load control software - Page 1
Forum section: electronics / testgear

author: djacobow
author_rank: Super Contributor
timestamp: July 21, 2022, 03:25:12 pm
content: Hey folks,Over there years there have been various Maynuo control libraries written and posted here. I recently had to get my load talking to a computer and tried the two that I could find, and both had problems, in part, because they were written in Python2.Anyway, I have a new library and at least for me, it works fine:https://github.com/djacobow/maynuo_load
Tektronix TDS series scopes field calibration software plus other utilities - Page 1
Forum section: electronics / testgear

author: volvo_nut_v70
author_rank: Regular Contributor
timestamp: January 20, 2022, 02:59:29 pm
content: These are from the Tektronix forum:The following files have been uploaded to the Files area of the TekScopes@groups.io group.Description:Field adjustment/Cal software for a whole slew of Tek TDS Series 'scopes.https://groups.io/g/TekScopes/files/TEK%20TDS%20ALL.RARIf not these might be of interest:http://www.hakanh.com/dl/TDSErrLog.htmhttp://www.hakanh.com/dl/TDS_pv.htmIf anyone has any other software that was available for these scopes (like 063-1134-00 Programming Exam Disk, etc etc) Or any Application Software Packages ( TDSPWR1, TDSJIT1V2, TDSCEM1, TDSCPM1 etc etc) Send them through to go up on Tekwiki!Also, firmware too, I'm pulling all the firmware I come across out via GPIB to put up on TekWiki as well, it's really easy if you follow this guide:https://www.eevblog.com/forum/repair/unified-tektool-released-!-(firmware-flash-tools-for-old-tds-series)/msg3758918/#msg3758918

author: TERRA Operative
author_rank: Super Contributor
timestamp: July 21, 2022, 11:43:52 am
content: Apologies for the thread bump, but here's a link to the 063-1134-00 V1.2 TDS Family Programming Examples Software disk:https://w140.com/tekwiki/images/d/d7/063-1134-00_V1.2.zip
Rigol DG822 Function Generator Errant Sweep Behavior Help Please CLOSED - Page 1
Forum section: electronics / testgear

author: t1d
author_rank: Super Contributor
timestamp: July 20, 2022, 09:39:34 pm
content: EDIT: 7/21/22 - There doesn't seem to be a problem with the Function Generator, after all. The problem seems to be operator error. So, I am marking this thread as "Closed" and starting a new, separate thread in which to ask operational questions.RE: Rigol DG822 Function GeneratorSerial # DG8A204201741FIRMWARE #00.01.08.00.01Hobbyist level skills, with nice lab equipment that is smarter than I am.The Problem – First time trying to use the Sweep FunctionWhen I select the Sweep output function, it illuminates. However, the Continuous output function remains illuminated and the unit continuously outputs the lowest frequency of the sweep range. (I am sweeping a sine wave from 20 to 20KHz, so 20Hz is being output, continuously.) This continuous output trips the trigger on my oscilloscope, so I can't capture the single sweep. When I press the trigger button, on the FG822, the 20-20KHz sweep is output, but the unit immediately reverts to outputting the 20Hz frequency, continuously.I have upgraded the firmware to the most current version (00.02.06.01.) However, this did not solve the problem, or change the errant behavior.So, I am thinking that this is a lingering bug, or that the manual does not fully explain the Sweep Function setting protocol.Here’s my Settings Protocol- Sweep Function- Sign Wave- 20Hz to 20KHz-1Vpp- Linear- Manual- Markers = Off. I have not set any Markers, because I did not think that they were in play.Are Markers the key? Or, is there some other step that I am missing, like an “enter” button that captures the new settings and I am not seeing it to push it?I have put in two calls to Rigol and left word for a callback on their automated voice system. As yet, I have not heard from them.Suggestions, please and thank you.

author: t1d
author_rank: Super Contributor
timestamp: July 20, 2022, 09:55:25 pm
content: Here is what the pattern looks like...

author: t1d
author_rank: Super Contributor
timestamp: July 21, 2022, 08:01:17 am
content: Okay, this video clued me in on some things...I am thinking that my Function Generator is acting normally and properly, in terms of how Function Generators are meant to operate. Meaning, that the continuous 20Hz signal output is a reference signal and is supposed to be there. That means that my issue is a lack of knowledge as to how to synchronize the Function Generator and the Oscilloscope to make a triggered sweep.IIUC, that is done with a signal, which may be a pulse, or a ramping voltage, etc, which runs on a second, concurrent channel. If this lack of knowledge is truly my state of affairs, I would appreciate someone providing a link to a "back-to-basics" video that explains (more in depth) how to set up a Function Generator and Scope to create and capture a sweep, using a trigger.Thank you for your help.
ISO New Software Radio Shack 22-805 Digital Meter - Page 1
Forum section: electronics / testgear

author: WA2SQQ
author_rank: Newbie
timestamp: July 21, 2022, 03:26:32 pm
content: I'm wondering if anyone knows of Windows based software for my Radio Shack 22-805 digital data logging multi-meter? It originally came with DOS software. Can't find either? Thanks in advance!

author: adam4521
author_rank: Regular Contributor
timestamp: July 21, 2022, 03:49:46 pm
content: If you have a suitable serial cable and serial dongle for your computer, I would try plugging it in and seeing if you can see any data flowing just through a serial terminal program (on Windows, putty for example). You might need to fiddle with baud rate, RTS/CTS etc. Is there any technical description of that in the manual? The interface if you are lucky might be very basic: like type ‘r’ for read, and you get some bytes back which is the reading on the display. If you can figure it out then next you turn to python and make your own script to make it do what you want!

author: WA2SQQ
author_rank: Newbie
timestamp: July 21, 2022, 04:12:50 pm
content: The manual didn’t provide any details. Honestly, I’m good with hardware, but clueless when it comes to writing software. I have seen several posts about software which was written, but have not found any.

author: adam4521
author_rank: Regular Contributor
timestamp: July 21, 2022, 04:20:55 pm
content: You might get lucky with sigrok:https://sigrok.org/wiki/RadioShack_22-805

author: AVGresponding
author_rank: Super Contributor
timestamp: July 21, 2022, 04:34:36 pm
content: It looks like a rebranded Metex ME11. This is an excerpt from an article about someone making a custom interface module for one:Fortunately, the Metexmeter manual included the details of theserial communications protocol. The meter has a female DB-9connector, and transmits and receives data as 7-bit ASCII withno parity and two stop bits—at 600 baud. In the shorthand often used for RS-232C connections this would be described as“600-7N2.” I ran one of my favorite terminal programs on alaptop computer, SIMPTERM,6and confirmed that when I senta letter “D” or a carriage return to the meter, it replied with thereadings. For example, after I hit the ENTER key it might reply, DC 42.034 V <CR>. “Very cool.” I thought, “This is goingto work!”Full article here:http://www.wd8das.net/MorseMeter.pdfThis site claims to have a user manual, but it's not secure, so click links at your own risk:http://ludingtoncitizen.ning.com/photo/albums/metex-me-11-manual

author: adam4521
author_rank: Regular Contributor
timestamp: July 21, 2022, 04:42:27 pm
content: QuoteMeh, ‘d’ for download instead of ‘r’ for read. Good find AVGresponding!

author: WA2SQQ
author_rank: Newbie
timestamp: July 21, 2022, 06:32:06 pm
content: So I downloaded Sigrok and it appears to be a command line program. I'm gathering more info, so it looks like there is some hope. I REALLY appreciate all the feedback!
E-Z-Hook banana connectors too large - Page 1
Forum section: electronics / testgear

author: nedeb
author_rank: Contributor
timestamp: July 18, 2022, 07:56:16 am
content: I bought a bunch of Pomona and E-Z-Hook cables for my "lab". The banana connectors from Pomona fit well in all devices but the E-Z-Hook plugs seem too large, they're hard to insert in devices to the point that I'm afraid of damaging the device connectors.Is it a known thing? Are these E-Z-Hook banana plugs not meant for plugging in DMMs, PSUs, etc?(To be accurate I should say the E-Z-Hook are too rigid rather than too large: according to my caliper the plugs are only 4.6mm thick compared to 4.8mm for the Pomona).

author: Martin72
author_rank: Super Contributor
timestamp: July 18, 2022, 12:49:26 pm
content: Hi,You mean those plugs, right ?https://e-z-hook.com/wp-content/uploads/2019/12/9202.pdfThey should fit on 4mm sockets well, with a little bit of "force" because of the spring loaded tip.Unfortunately some sockets are having more depth than other....I think the only "standard" are the 4mm diameter...

author: graybeard
author_rank: Frequent Contributor
timestamp: July 18, 2022, 06:21:07 pm
content: I like Johnson (Cinch) banana plugs. I have used them for many years.https://tubedepot.com/products/banana-plug-solderless-johnson-made

author: nedeb
author_rank: Contributor
timestamp: July 20, 2022, 02:18:32 pm
content: I have cables with stackable plugs so this one:https://e-z-hook.com/wp-content/uploads/2019/12/9260.pdfbut it seems the male connector is exactly the same as for the 9202 plug.Thanks for the picture, good to know the socket lengths are not standard!The E-Z-Hooks don't feel as bad now, maybe I got used to it already... A little twist helps a lot when it's a bit tight.
Fluke 345 - Looking for power adapter information - Page 1
Forum section: electronics / testgear

author: salvagedcircuitry
author_rank: Regular Contributor
timestamp: July 20, 2022, 02:06:04 am
content: Hi. Does anyone know what the voltage, current and port orientation of the fluke 345 power adapter is? Is it center positive?I called fluke support and they did not know.If anyone has a photo of the psu that would be excellent. Thanks!Thanks!

author: Uunoctium
author_rank: Frequent Contributor
timestamp: July 20, 2022, 05:39:33 am
content: see datasheet (Mouser)

author: alm
author_rank: Super Contributor
timestamp: July 20, 2022, 06:27:43 pm
content: Look at the pictures inthis eBay auction. The label shows that the supply is center positive, and the 115/230V switch and the size clearly indicate that it's a linear power supply. Since the banana jacks won't be isolated from the power supply, I imagine insulation requirements will be quite high (up to whatever the maximum rating of the 345 is). So be careful to use the right cable and plug, not a flimsy cable only designed for 12V.
rigol released a new oscilloscope - Page 1
Forum section: electronics / testgear

author: wudebin2008
author_rank: Newbie
timestamp: July 20, 2022, 10:57:50 pm
content: My English is poor，l :-DDook at the pictures below

author: Martin72
author_rank: Super Contributor
timestamp: July 20, 2022, 11:01:32 pm
content: You´re too late...https://www.eevblog.com/forum/testgear/rigol-hdo1000-and-hdo4000-12bit-oscilloscopes-launched-in-china/
HP8592B frequency accuracy doubts. - Page 1
Forum section: electronics / testgear

author: salvaf
author_rank: Newbie
timestamp: July 17, 2022, 02:18:46 pm
content: Hi, I have got hold of a HP8592B that lost battery charge hence has lost factory calibration, no copy of it existed. I have load default data and performed frequency, amplitude and YIG calibration, all passed, after that the confidence test passed as well. The analyser seems to work ok but the frequency accuracy seems to be off, after a frequency CAL if search for a known FM broadcast with 1Mhz span the frequency is off by around 400Khz.Is this kind of frequency error normal in this model of SA? I am not very sure on what to expect in terms of frec. accuracy for this unit or if there is a way to improve it.I have attached a copy of the calibration data.Thanks for your help.Salva
Hantek DSO5072P stuck on the logo screen (kernel panic, log attached) - Page 1
Forum section: electronics / testgear

author: Ken Senda
author_rank: Newbie
timestamp: February 13, 2017, 01:40:03 pm
content: On powering up, my DSO5072P gets stuck on the logo screen, and only very occasionally it completes the boot sequence.I tried connecting to the UART, which seems to work only those rare occasions where DSO actually starts up. Anyway, I tried removing /param/sav/run1kb* as per instruction provided in other threads, but without any apparent effect.I then tried rebooting from the serial console, and that gave me the attached log.As a side note, I had been having what now seems like a minor version of the same problem (it occasionally got stuck) for some months before I upgraded the firmware to the latest version. After the upgrade, it got worse (now it gets stuck more often than not).Now I'm completely at a loss, and I'd be really thankful if anybody kindly gave me any sort of direction.Thank you very much in advance.

author: newport@ts.co.nz
author_rank: Newbie
timestamp: July 20, 2022, 10:40:21 am
content: Had a similar issue with mine, turned out the 3V battery in the back was going flat and it was having to recover itself some timesReplaced the battery which was at 2.6V with a new one and not a hiccup since
AVO DA114 DMM circuit diagrams - Page 1
Forum section: electronics / testgear

author: factory
author_rank: Super Contributor
timestamp: July 17, 2022, 08:00:33 pm
content: I've had a request for the information on the AVO DA114 digital multimeter, attached are the circuit digrams for the mains/battery power supply & DMM boards.David

author: factory
author_rank: Super Contributor
timestamp: July 17, 2022, 08:02:28 pm
content: Two more of the DMM boards.

author: factory
author_rank: Super Contributor
timestamp: July 17, 2022, 08:05:42 pm
content: And finally parts lists for the battery/mains PSU, DMM boards and some general info on this DMM.
Wizards of obscure instruments, hear my cry! (Solartron 1200 Signal Processor) - Page 1
Forum section: electronics / testgear

author: taras
author_rank: Newbie
timestamp: July 16, 2022, 02:52:25 am
content: Hey Folks,I just scooped a Schlumberger Solartron 1200 Signal Processor on local pick-up from eBay. After using the SR780 in grad school I've been hunting for something similar for my home lab, and this seemed close enough to play with for the price. However, unlike the SR780, this thing seems to have zero online presence. Only thing semi-useful I found is this thread:https://modwiggler.com/forum/viewtopic.php?t=131750. This guy slow_riot has paper manuals, I may make an account on that forum just to see if I can DM him. Otherwise I've had no luck. Anyone out there have any insight or docs on this thing?Once I have it on hand, I can crack it open and make a thread documenting it (an internet first it would seem). Seems like it has 90 or 100dB dynamic range, has an internal generator, and best of all weighs 75lbs - so you know it's good. For 10% the cost of a SR780, maybe a score?Anyway, hope someone knows something.Thanks, -j

author: taras
author_rank: Newbie
timestamp: July 16, 2022, 04:01:42 am
content: A direct search failed, but looking for 80s era Solartron catalogs yielded an entry for the 1201. Unsure the difference but it's something. 2mHz low end, not bad. Looks like the 1201 has a floppy for software options.

author: Zenith
author_rank: Frequent Contributor
timestamp: July 16, 2022, 09:40:45 am
content: I've come to the conclusion that before buying a piece of test gear, it's best to get the service manual first. Sometimes they are unobtainable.This person sells a bumper DVD of Schlumberger/Solartron manuals.https://www.ebay.co.uk/itm/252452200197?hash=item3ac752df05:g:CJQAAOxyni9TBfyrI don't see yours there, but he does say he has others not on the list. It has to be worth contacting him.

author: taras
author_rank: Newbie
timestamp: July 16, 2022, 10:04:20 pm
content: Thanks Zenith. I messaged that seller, as well as made an account on that other forum to message the slow_riot fellow. Hopefully I can turn something up (which I'll post here).Yeah, I agree it's wise to find docs before winging it on unknown equipment. But... this one seemed like a fun endeavoredit: no luck from the ebay seller
Marconi 2380 SMPS capacitor replacement - Page 1
Forum section: electronics / testgear

author: brian_mk
author_rank: Regular Contributor
timestamp: July 14, 2022, 01:54:45 pm
content: Hi,I am attempting to repair the power supply in the display unit of a Marconi 2380/2382 Spectrum Analyser.It's a SMPS using a SG3526 controller.A blocking capacitor (C9) in series with the main transformer primary has failed.The original device was a TRW-61 2.2uF. These are 250V Metallised Polyester high current capacitors rated at 4 Amps. They have been obsolete for some time.A possible candidate for a replacement is a Vishay MKP1839 522 634HQ. These are Polypropylene, rated at 630V and intended for high current, high pulse applications.I am a bit unsure if the Vishay part will handle the current. Can anyone confirm if it will be suitable?I should add that the PSU operates at 125kHz.I have attached some files that should help:-AC1.jpg : The schematic from the service manual. The Failed capacitor C9 is ringed in red.AC1_Current.jpg : Shows the normal pulse current (3A peak) through the capacitor and transformer primary in series (from the service manual).2380PSU.pdf : The relevant section of the parts list and the spec for the original TRW-61 capacitor.3651112.pdf : The Vishay replacement capacitor spec.Thanks in advance.Brian.

author: brian_mk
author_rank: Regular Contributor
timestamp: July 14, 2022, 03:19:38 pm
content: My calculations for the power dissipation in C9 are as follows:-Curves in the Vishay spec for a 3.3uF capacitor indicates tan delta at 125kHz is around 0.07.We have 2.2uF, so assume it's somewhere between the curves for 3.3uF and 1uF. Say 0.05.ESR = tan delta / (2 * pi * f * C) = 0.05 / (2 * pi * 125000 * 2.2 uF) = 0.086 Ohms.From the current waveform (3A peak pulses), Irms = sqrt ((3^2) / 4) = 1.5AAverage Power Disspation in C9 = I^2 * ESR = 1.5^2 * 0.086 = 0.19W.That doesn't seem like much. I would expect the capacitor to handle 200mW without overheating. Have I got the calculations right?

author: brian_mk
author_rank: Regular Contributor
timestamp: July 14, 2022, 03:26:33 pm
content: I'm wondering - is 'Test Equipment' the best forum to post this question?It really needs someone with an understanding of SMPS, capacitors and circuit design.

author: Martin72
author_rank: Super Contributor
timestamp: July 14, 2022, 03:58:33 pm
content: Hi,I don´t see a problem not to use the vishay, I´ve looked to wima MKP10 impulse caps, there are also no current ratings in their specs.Maybe asking the manufacturer directly.We got some caps for exactly the same usage, but "unfortunately" I got holidays actually...And yes, maybe the repair section could bring more answers.Martin
Rigol DS1202Z-E firmware question - Page 1
Forum section: electronics / testgear

author: jpenn
author_rank: Contributor
timestamp: July 14, 2022, 09:33:51 pm
content: I was looking to update the firmware on my Rigol DS1202Z-E oscilloscope to the latest version and I noticed that the release notes stated that one of the things this version fixes is "Modification of factory requirements".Does anyone have an idea what that means?

author: Fungus
author_rank: Super Contributor
timestamp: July 15, 2022, 02:54:58 am
content: Quote from: jpenn on July 14, 2022, 09:33:51 pmNo, but I'm betting it isn't anything bad.OTOH: If it ain't broke, don't fix it. I'd also bet that itisn'ta whole load of extra features that they just added.
Hp-16056a current divider for HP-4140b - Page 1
Forum section: electronics / testgear

author: RichardM
author_rank: Frequent Contributor
timestamp: July 13, 2022, 03:42:13 am
content: Thought I would try my Iuck here and the Agilent group on groups.io where I have got some general comments. I picked up an HP-4140b boat anchor and was interested in what the 16056a accessory is. I cannot find any real details, it is listed as a current divider to increase the current range on the HP-4140b feom 10ma to 100ma. Does anyone have any sepcifics on this attachment?RegardsRichard
Rohde & Schwarz PMK Oscilloscope Probe Holder - Page 1
Forum section: electronics / testgear

author: jjoonathan
author_rank: Frequent Contributor
timestamp: July 13, 2022, 02:58:49 am
content: I made a little hat to hold the PMK probes for my RTO oscilloscopeIt's less messy than the usual probe pile -- here is the STL file in case you have a scope with PMK probes and would like to make your own probe holder.https://www.dropbox.com/s/of8zmtw6ljfjqfo/3d_probe_holder-probe_holder%20%28Meshed%29.stl?dl=0Speaking of RTO scopes, I have been keeping half an eye on the used market for an RTO2000, which would let me consolidate some USB3 instruments. I've only really been looking at ebay, but the whole EUR:USD 1:1 forex situation makes me wonder if there aren't European ebay alternatives I should also take a look at. What are the usual suspects for TE shopping across the pond?EDIT: put R&S into subject for search purposes
Rigol DL3021 DC Load - am I going crazy? - Page 1
Forum section: electronics / testgear

author: brabus
author_rank: Frequent Contributor
timestamp: July 12, 2022, 08:03:21 pm
content: Good morning everyone,I needed to test the current foldback of a simple 12V 8A buck DC-DC I just made. I saw the Rigol DL3021 and presto, I bought it.The CR setting is driving me crazy. The unit can be set to operate in the 15 kor the 15range, BUT...The minimum resistance in the 15k range is 2--> too high for me.The maximum voltage in the 15range is the great majesty of 10 (TEN) volts. No way to set it to 12V, the unit simply says: "The voltage setting value has exceeded the voltage upper limit!".And, for the love of Jesus, DO NOT apply 12V to the load (even when the input is OFF) and play with the CR settings: the OVP message will pop up and STAY THERE, no matter what. You can play with any button, you can phisically disconnect the input, there is no chance: you MUST turn the unit off and on again. Extremely annoying software bug, right there.I read good things about the DL3021, but it's just unable to fit the basic need of testing a trivial 12V DC/DC.Am I doing something wrong? Or have I just bought a solid piece of crap?Thank you.

author: thm_w
author_rank: Super Contributor
timestamp: July 12, 2022, 09:48:22 pm
content: Can you use Constant Power mode instead?I don't think many people use CR mode, not that its an excuse.

author: Martin72
author_rank: Super Contributor
timestamp: July 12, 2022, 09:54:57 pm
content: QuoteWe do...But we use other electronic loads where this is not a problem ( old "Zentro" loads, they only know constant current or constant resistance).

author: slugrustle
author_rank: Frequent Contributor
timestamp: July 13, 2022, 01:08:33 am
content: Confirmed by note 5 on page 5 of the DL3000 series datasheet (https://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0778/1/-/-/-/-/DL3000_DataSheet_EN.pdf)QuoteThe note refers to the CR mode range on page 3 of the same datasheet.

author: The Doktor
author_rank: Regular Contributor
timestamp: July 13, 2022, 01:10:40 am
content: I think constant current is what you need. On my Maynuo I would start with cc at 8A, set the knob to .1A per click, and turn the knob until the supply entered rollback.CV & CC are all I ever need (except pulse), haven't found a use for CR or CP yet.The behavior of the Rigol seems wrong, hopefully a bug they fix.Ed
SDM3045X: Can you save screen image to a USB stick? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: July 10, 2022, 03:02:22 pm
content: I've done some looking and I am not finding this in the menus anywhere, is it possible?Stick is recognized & save options of xml & csv are offered. No option for a screengrab that I can find.

author: tautech
author_rank: Super Contributor
timestamp: July 10, 2022, 09:05:13 pm
content: Yep, RTFM P47.https://int.siglent.com/u_file/document/SDM3045x_UserManual_UM06034-E01A.pdf
Ise there a juicy output, multi-phase frequency generator, for power circuitry ? - Page 1
Forum section: electronics / testgear

author: LinuxHata
author_rank: Frequent Contributor
timestamp: July 13, 2022, 08:14:32 pm
content: Hello.I'm looking for a not so expensive DDS (or any other type) generator, which will:1. Have up to 4, fully independent and ground isolated outputs, with enough "juice" to drive some 40A, 600V MOSFET directly.2. Phase shifting, dead time and duty adjustable and all other things needed for driving multi-phase converter circuits.3. No need for Sine, triangle, sawtooth or any other waveform except the square one.4. Operating frequency up to 2mhz.Any ideas?Yes I know that power driver can be added to many DDS output stage, but I'd prefer finished solution, if possible.

author: Martin72
author_rank: Super Contributor
timestamp: July 13, 2022, 11:00:41 pm
content: Hi,This is special...Me I would design indeed a individual solution with a power driver, because of the gate-currents which can reach easiliy some amperes depending (not only)on the gate charge capacity of the used FETs.But have a look here:https://www.berkeleynucleonics.com/model-588-oemAnd :https://www.berkeleynucleonics.com/Model-575If I was you I would contact them with the same question you quoted here.Martin

author: LinuxHata
author_rank: Frequent Contributor
timestamp: July 14, 2022, 05:36:18 am
content: Well I checked their website, and also specs of device they offerThat picosecond delays and so on, give me idea that they're using this device for cyclotrons, particle accelerators and so on.So it will have both aerospace-grade pricing and FBI-grade questions, why average DIYer decided he needs something like thatI just need a device, to test, analyze and develop various output power stages of SMPS. I'm not playing with railguns, tesla coils and so on
BM550 automotive battery tester - Page 1
Forum section: electronics / testgear

author: firewalker
author_rank: Super Contributor
timestamp: July 14, 2022, 12:46:08 pm
content: Recently I bought a cheap (~20 USD) automotive battery tester from Alixpress. The model number is BM550.https://www.aliexpress.com/item/1005003477765500.htmlYou set the voltage and the CCA of the battery and it returns Status Of Heath (SOH) %, Status Of Charge (SOC) %, Internal Resistance in mOhm and CCA.The overall construction seems to be OK. Nice soft cables and strong clamps. The viewing angle of the screen is terrible though.It uses 4-wire method for the measurements. It doesn;t seem to measure the internal resistance using the AC method though. It just uses 100 mA current pulses (measured with a 1 mV/10 mA current clamp). I don;t have another quality tool to double check it.It uses a China made mcu. Synwit SWM181CBT6-50. And another laser etched chip (just an amplifier?).SWM181CBT6-50:http://www.lookmcu.com/pdf/622338.pdf
Help identifying arm developer tool - Page 1
Forum section: electronics / testgear

author: Gominalo
author_rank: Contributor
timestamp: July 07, 2022, 11:04:05 pm
content: Hello,I recently got this arm multi trace from electronic dump and i need some help to find some information about and software.Thank you.

author: ataradov
author_rank: Super Contributor
timestamp: July 07, 2022, 11:35:57 pm
content: This stuff is probably 20 years old. There is no software for modern OSes. And I doubt this is too useful with modern devices anyway.Here is the first random place I found that has documentationhttps://www.artisantg.com/TestMeasurement/68030-1/ARM-MultiTrace-Multi-ICE-Trace-Port-Analyzer-and-JTAG-EmulatorNo idea where to get the software for this ancient unit.

author: langwadt
author_rank: Super Contributor
timestamp: July 07, 2022, 11:47:39 pm
content: Quote from: ataradov on July 07, 2022, 11:35:57 pmI think I've used one some 20 years ago, it was expensive something like +$10000

author: Gominalo
author_rank: Contributor
timestamp: July 08, 2022, 01:11:52 pm
content: Quote from: ataradov on July 07, 2022, 11:35:57 pmCheck this out, you can still download from official website.https://developer.arm.com/downloads/-/rvds-and-adsAlso the official documentation for the multitracer.https://developer.arm.com/documentation/dui0150/aThank you for your responses. If you have any knowledge to share i'll be glad to read.

author: Gominalo
author_rank: Contributor
timestamp: July 08, 2022, 01:15:05 pm
content: Quote from: langwadt on July 07, 2022, 11:47:39 pmDo you still have some documentation or somethimg to share?Thank you so much!

author: ataradov
author_rank: Super Contributor
timestamp: July 08, 2022, 03:25:38 pm
content: Quote from: Gominalo on July 08, 2022, 01:11:52 pmI've seen it, but I'm not sure this software would support that old hardware. They used ReavView brand for a long time, it is still active. And I see no dates on the software downloads.But if you want to make it work, then download the software and see if you can even run it on modern OSes.
Schlumberger Solartron FRA repair - Page 1
Forum section: electronics / testgear

author: CambridgeMart
author_rank: Regular Contributor
timestamp: July 07, 2022, 08:52:19 pm
content: I recently acquired a Schlumberger Solartron 1170 frequency response analyser; having used these in a previous job and found them very useful, when one came up at a good price, I hit the button.Having powered it up, a number of the 'buttons' don't work; these are the ceramic touch type switches with an audible feedback, so not a question of cleaning or replacing them. There also seems to be an intermittent power supply issue which should, hopefully, be relatively easy to find.Does anyone have the schematics / service manual for one of these beasts? There is one on ebay, but the shipping charge is extortionate so I'd rather pay for an electronic version.
Sefelec SXS506 schematics - Page 1
Forum section: electronics / testgear

author: reuzzz
author_rank: Newbie
timestamp: July 07, 2022, 06:31:15 am
content: I'm searching for the technical manual with schematics of the Sefelec / Eaton SXS 506 dielectrical HV tester. Not the operating manual. I can't find it on the Sefelec / Eaton website. I've also tried to contact customer support but that goes painfully slow without any response.
Help finding schematic diagrams or service manuals for DSO2D15 HANTEK - Page 1
Forum section: electronics / testgear

author: crysti
author_rank: Regular Contributor
timestamp: March 31, 2022, 06:34:18 pm
content: After few hours of Power On wave generator stop to working.Now have only DC component with 3,8V DC, whether the generator is on or off.I tested, I have no signal on pins 21 and 22 from DAC902.Who can help me with schematic for AWG part?

author: crysti
author_rank: Regular Contributor
timestamp: April 20, 2022, 01:57:10 pm
content: Any help me with a generic scheme with output for AWG?

author: DavidAlfa
author_rank: Super Contributor
timestamp: April 20, 2022, 04:04:35 pm
content: There's no schematic...

author: arturmariojr
author_rank: Contributor
timestamp: July 07, 2022, 10:54:05 am
content: The schematics were done using reverse engeneering by pcprogrammer. A big work!Here you get them:https://www.eevblog.com/forum/testgear/hantek-dso2xxx-schematics/msg4270783/#msg4270783If you discover the source of such terrible noise in this scope, please, share with us!
Willtek / Aeroflex 9102 Handheld Spectrum Analyzer 100kHz -4GHz  - Page 1
Forum section: electronics / testgear

author: M0DMJ
author_rank: Newbie
timestamp: July 10, 2022, 11:06:24 am
content: I Now Have a Willtek / Aeroflex 9102 Handheld Spectrum Analyzer 100kHz -4GHz that works great.But I can not Find the 9100 Data Exchange Software anywhere on the web.Can Anyone help me with a Copy Please?m0dmj.cp@gmail.comMany thanks Colin M0DMJ
Fluke 199 without battery - Page 1
Forum section: electronics / testgear

author: Spekham2013
author_rank: Newbie
timestamp: July 07, 2022, 06:45:15 pm
content: Hi,I am in the process of trying to repair a broken fluke 199. I currently doesn't have a battery, and I am trying to fix a problem where the device doesn't start. I have been googling around to see if a fluke 199 works without battery and only supplied via the charger, but haven't really gotten a clear answer to this.Does the Fluke 199 start without a battery using only a external supply? If it doesn't what kind behavior can be observed?

author: alpher
author_rank: Frequent Contributor
timestamp: July 08, 2022, 01:01:58 am
content: It does work.
Fluke 2 pin banana jack - Page 1
Forum section: electronics / testgear

author: targit
author_rank: Regular Contributor
timestamp: July 06, 2022, 08:14:45 am
content: Hi, my Fluke i30 current clamp connector has failed and I am struggling to find a suitable replacement part, I have tried RS, element14 and a few other online stores, but cant find a similar type to the factory fitted. There is no part number on the plug (only says Fluke). I would rather not fit 2 separate 4mm plugs if I can help it. I dont know if there is some special name other than "2 pin male banana plug" . The only results I am getting are unshrouded and not even clear they have 2 separate conductors.Anyone know a source for these?Thanks.

author: switchabl
author_rank: Frequent Contributor
timestamp: July 06, 2022, 09:07:12 am
content: Replacing the cable would probably be easier than trying to find (and fit) a new connector. Fluke might be willing to sell you a new cable assembly and if not, you could just buy a Pomona 6283-C and cut off one end.

author: targit
author_rank: Regular Contributor
timestamp: July 06, 2022, 10:06:33 am
content: Thanks for that part number, I went around the Pomona website and couldn't find anything like that. If I can manage to replace the whole cable with something more flexible than what seems like standard RG58 coax on the Fluke then I will happily do it.I just checked the data sheet and Pomona do in fact use RG58.

author: switchabl
author_rank: Frequent Contributor
timestamp: July 06, 2022, 11:56:40 am
content: Quote from: targit on July 06, 2022, 10:06:33 amYes, I'am afraid so. I doubt you will be able to find one with a much nicer cable. The reason I suggested replacing the whole cable is that:- "safety"-type connectors are often molded to the cable, hand-assembly-type variants are not necessarily readily available- if you could get one for hand-assembly, it might well be more expensive than a cable assembly and you probably need a crimping tool as well.I suppose you could put an insulated BNC on the existing cable (or on some other coax you like better) instead and use it with a suitable BNC to dual banana adapter (Fluke PM9081, Stäubli 67.9537-21...). Those are available as a crimp version (Pomona 73104).

author: targit
author_rank: Regular Contributor
timestamp: July 06, 2022, 01:51:02 pm
content: Yes, I think you are right, a BNC will be a lot easier to replace than this unobtainium connector and also make it easier to hook up to the scope. There's not much in it price wise between the two solutions, so the added functionality of a BNC wins

author: BeBuLamar
author_rank: Super Contributor
timestamp: July 06, 2022, 06:17:31 pm
content: The i30s version has BNC connector.
Bio-Rad 200/2.0 Power Supply?... - Page 1
Forum section: electronics / testgear

author: Rax
author_rank: Super Contributor
timestamp: July 05, 2022, 06:22:23 pm
content: Hi all,Been looking for a "HV-ish" power supply for some specific applications (needing, say, over 160V and maybe over 100mA sourced, fully adjustable, ideally with current limiting).I ended up grabbing (very affordably) this biomedical (I think...) power supply.Upon closer reading I noticed a spec'd 5% ripple, which sounds extremely high, and now I'm horrified.This would be mostly for testing and experimenting with voltage references, regulators, possibly tube equipment (likely audio only). Just sort of regular bench diy projects, nothing very exotic.I have been looking for a service manual to get a sense how kosher this PS is for regular DIY applications, but nothing. All I can do is look at the specs and try to assess based upon that. With an SM I'd probably see if I can mod this to improve any misgivings (may try that either way depending on what direction I feel I should go).Would appreciate some thoughts on this - thanks!

author: TurboTom
author_rank: Super Contributor
timestamp: July 05, 2022, 10:52:50 pm
content: It's true - these electrophoresis power supplies perform exceptionally poor as general purpose lab supplies. Not only that there may be considerable ripple on top of the DC output, these units moreover also don't like to be operated completely off-load and tend to cut the output voltage if there isn't at least a certain current flowing. They are purpose-built for electrophoresis appllications and there, the ripple or low(ish) accuracy don't matter that much. The motion of the ions on the carrier / substrate in the electrophoresis process depends on the amount of charge that's been flowing through the pile, so accurate current measurement and a good timer are more relevant than precise voltage regulation. The voltage setting can be considered more like a limiter function.The least expensive moderately HV lab supplies are made by HSPY (search for this), though they are not troublefree either...Good luck,Thomas

author: Rax
author_rank: Super Contributor
timestamp: July 06, 2022, 07:25:01 pm
content: Thomas,Thank you very much - what a bummer... That's some shipping money (2x) thrown out the window. Live and learn.I am currently evaluating between a Lambda LQ-415 and an HP-6209B.I like the Lambda for what seems very clean output, digital display, and very small footprint, and the HP for (probably) being easier on the wallet, not having custom ICs (which the Lambda does), but not so much for its less clean output. Other positives: a bit more range. Probably more rugged too.Would be interested in thoughts on these options.
Agilent ESA-E E4404B 2db amplitude low error on high band (3-6.7 GHz) - Page 1
Forum section: electronics / testgear

author: inaxeon
author_rank: Regular Contributor
timestamp: April 14, 2022, 05:22:05 pm
content: HelloI've been looking at this rather interesting problem over the last few days. If I sweep a test tone, just as it crosses 3 GHz, a 2dB fall in amplitude is observed. I checked against another analyser. It's definitely the ESA-E at fault.I went through all of the RF performance tests outlined in the service manual. The problem appears to be at the A8A6 (RYTHM) where the IF output is -24.5 dBm with the suggested input instead of -22.5 dBm. The error is quite linear all the way through to 6.7 GHz.Beyond this I'm unsure how to tackle it properly. I found that I can make a cheeky modification to the A8A4 (LOIS) by cutting the Pi attenuator at its output form 3dB to 1dB. Technically fixes the problem but is this really the right approach?Has anyone seen anything like this? Are there some adjustments that could be made or perhaps do I have a faulty switch or mixer in this assembly!Thoughts appreciated.

author: inaxeon
author_rank: Regular Contributor
timestamp: April 14, 2022, 07:42:48 pm
content: The other thing that has me scratching my head is that I have a further 2dB of video shift error in the high band, as in: With my "fix" I get accurate amplitude with a small span i.e. 100 MHz, but with a large span i.e. full span, I've got another 2dB of error.How is the instrument meant to calculate and correct video shift in the high band? The 50 MHz test signal surely wouldn't be adequate for that? I can't see any mention of this in the service manual either. There must be something I'm failing to understand here...

author: inaxeon
author_rank: Regular Contributor
timestamp: April 26, 2022, 11:37:48 am
content: I found this document here, which has some pages related to this (not appearing in the calibration manual):http://www.xymox1.com/Misc/Adjustments.pdfUnder the heading "Frequency Response High Band Adjustment". It looks like how this might be able to corrected, certainly the video shift part of it. I've not yet found any detailed instructions on how to perform this procedure, even if one possessed the equipment listed.

author: inaxeon
author_rank: Regular Contributor
timestamp: July 06, 2022, 02:09:24 pm
content: Looks like someone has (now) covered this in this thread:https://www.eevblog.com/forum/testgear/esa-instrument-adjustments/
BM235 sampling speed - Page 1
Forum section: electronics / testgear

author: gabriele
author_rank: Contributor
timestamp: June 26, 2022, 11:01:45 pm
content: Hello,I recently brought an BM 235 multimeter, but I am not sure about its behavior, i have uploaded a video where i measure a low frequency signal in DC mode but it seems it does not refresh 5 times at seconds as written in specs.https://youtu.be/MicxVZZ4w0kIt behaves similarly to this in terms of refresh rate:https://youtu.be/9s9LXOBknck?t=125It's ok or i should RMA it?

author: Kean
author_rank: Unknown
timestamp: June 27, 2022, 11:51:47 am
content: What you show is just an auto-ranging delay I think.Press the range button to select a suitable fixed range, and see if it then performs as you expect.Hold the range button for a couple of seconds to re-enable auto ranging when finished.

author: gabriele
author_rank: Contributor
timestamp: June 28, 2022, 10:45:34 pm
content: Unfortunately the problem persists even if manual range mode is selected.The DMM is currently measuring a 5Vpp 100mHz sine wavehttps://youtube.com/shorts/r2rpKycN1LI?feature=share

author: J-R
author_rank: Super Contributor
timestamp: June 29, 2022, 06:10:36 am
content: Mine behaves identically, even the 1 second complete freeze every few seconds. Feels like about 3 updates per second.I did a quick zip through my LCD-based handheld DMM collection and didn't find anything that was much faster, although I didn't see any that had the complete freeze issue like the BM235. Of course units with bar graphs were very fast.For raw speed on a budget I'm a fan of the older VFD bench DMMs, perhaps look for a Fluke 8840A.

author: gabriele
author_rank: Contributor
timestamp: July 05, 2022, 12:10:06 am
content: Some time it is pretty annoying that the refresh rate is not constant.It would be nice to know if all the BM235 have the same defect or just a few

author: giosif
author_rank: Frequent Contributor
timestamp: July 05, 2022, 08:58:52 am
content: Just tried it on a Gossen Metrahit Pro and the display update speed is not that much better than yours (auto or manual ranging didn't seem to make much of a difference).The EEVBlog 121GW seems a bit better, but not by a lot.Next comes the Agilent/Keysight U1241B, which I think is decent in update speed.And the best I've seen so far is the Agilent/Keysight U1252B (and, guessing, also its OLED sibling, the U1252B), which generally has a very fast display update speed.HTH
SIGLENT SDS 1104X-E - Page 1
Forum section: electronics / testgear

author: bootloader9800
author_rank: Contributor
timestamp: July 05, 2022, 08:27:31 pm
content: Hi Yall. I got a SIGLENT SDS 11041X-E.While using the Data logger function to record data, it won't let me set the horizontal scale to less than 1 second. Is this the minimum that I can go? ( Manual is not clear on this)Ty

author: tautech
author_rank: Super Contributor
timestamp: July 05, 2022, 08:40:26 pm
content: Quote from: bootloader9800 on July 05, 2022, 08:27:31 pmWhich manual ?Which firmware version ?FYI, the data logger manual:https://siglentna.com/download/22008/
New product review of ConsoleCast - Page 1
Forum section: electronics / testgear

author: ploegmma
author_rank: Newbie
timestamp: July 05, 2022, 09:06:27 am
content: Want to do some lab automation with SCPI? Maybe this review of ConsoleCast is of interrest for you:https://youtu.be/BW-mwnZrJ5A