hybridfree/eevblog-posts huggingface dataset:
Fluke T5-1000 Low Readings... - Page 1
Forum section: electronics / testgear

author: gotwood
author_rank: Contributor
timestamp: November 30, 2016, 09:55:51 pm
content: Wondering if anyone knows if it would be faulty and needs repairs or its because I get the reading when testing 400hz ground power unit for aviation.The unit reads about 2 volts low on 115/120 circuits. But is reading nearly 12 volts low on the 120V400hz systemMy Fluke 87V reads the voltage perfectly.

author: Axtman
author_rank: Regular Contributor
timestamp: April 01, 2017, 02:27:41 am
content: I don't know if this helps but the Fluke T5 meters are not true RMS. They also will read ghost voltages.
Fluke fuse - Page 1
Forum section: electronics / testgear

author: Liteace
author_rank: Regular Contributor
timestamp: March 29, 2017, 10:31:23 pm
content: Ive got here an like new old Fluke 23 series 2, the large fuse has popped inside, i only use this tester for automotive testing, volts, amps & residence.I cant get a new fuse locally and will have to order it, it wouldn't make any difference if i put a normal 20 amp fuse in would it?Thanks

author: retiredcaps
author_rank: Super Contributor
timestamp: March 29, 2017, 10:35:40 pm
content: No, don't put in a bigger rated fuse. Use the proper rated fuse and specifications for your meter.

author: ModemHead
author_rank: Frequent Contributor
timestamp: March 30, 2017, 12:01:10 am
content: Yes, stick with the proper fuse. But when you search for a replacement, look for KTK-15 (Bussmann), KLK-15 (Littelfuse), and Fluke 820829. It may expand your options.

author: james_s
author_rank: Super Contributor
timestamp: March 30, 2017, 12:01:51 am
content: You can't guarantee that you or someone else will never use the meter on mains voltage or higher. These fuses are special for a very specific reason, and should never be substituted with a cheap ordinary fuse.
Flakey Fluke 8060A - Page 1
Forum section: electronics / testgear

author: moby
author_rank: Contributor
timestamp: March 29, 2017, 08:33:57 pm
content: I have inadvertantly killed two Fluke 8060As (a couple of years apart). It seemed to occur when I drew an arc off one of the test probes when measuring a voltage supposedly well within the ratings of the meter. Highside primary SMPSU testing springs to mind (around 400v). The meters now only work some of the time. Other times they display gibberish at startup (a random number or things like "-OL") which don't change no matter what the switcn settings. The four buttons (REL, dB etc) still seem to work. Some days the meters work fine!. Any ideas what might be happening here - I know these things are ancient but nothing new quite matches the feature set.M

author: retiredcaps
author_rank: Super Contributor
timestamp: March 29, 2017, 08:53:43 pm
content: First, welcome to the forum.The Fluke 8060A have a known problem with leaky capacitors. They leak from the bottom bung and you cannot tell from visual inspection. There are many threads here on the leaky 8060A capacitors with pictures.If you were measuring high voltage, there is a chance that the MOVs in the 8060A became damaged. They should measure open circuit resistance. You can measure in circuit first, then desolder to verify.

author: ModemHead
author_rank: Frequent Contributor
timestamp: March 30, 2017, 12:19:04 am
content: Quote from: moby on March 29, 2017, 08:33:57 pmThen hopefully nothing major is fried. But still,thou shalt check for leaky capacitors.Also carefully take apart the LCD/microprocessor assembly and clean the elastomeric connectors with strong IPA.

author: tautech
author_rank: Super Contributor
timestamp: March 31, 2017, 03:56:42 am
content: @mobyIf you haven't found this thread started by one of the designers or your 8060A it's worthy of a read:https://www.eevblog.com/forum/testgear/old-fluke-multimeters/
Kikusui PAK20-18A unstable output - Page 1
Forum section: electronics / testgear

author: rvalente
author_rank: Frequent Contributor
timestamp: March 29, 2017, 11:08:31 am
content: Hello mates,got this great little power supply from Kikusui, 20V, 18A in a very small package, the unit is working alhtough the output is floating a lot, +/-300mV.The worst side of janapenese TME is their total lack of sharing information policy, its almost impossible to find service manuals and any information.Can someone help me here?

author: capt bullshot
author_rank: Super Contributor
timestamp: March 29, 2017, 12:29:16 pm
content: Don't know if it helps:The thing looks like a switching mode power supply (should be obvious if you open the box). A common reason for output instability is the feedback loop of the smps / pwm controller. My hint: open the case, try to identify the control loop IC and supporting components, search for datasheets to get an idea of the construction and circuit. Then try to watch the feedback / control loop waveforms and search for worn out components and so on.It's way more difficult to do without a service manual, but in my opinion still achieveable since it's "just a power supply" and not something really fancy bag of tricks like the Datron 1061 multimeter (without the service manual no way to understand whats happening inside).
Fan noise from Rigol DG1022Z waveform generator and DS1054Z os oscilliscope... - Page 1
Forum section: electronics / testgear

author: mtolesen
author_rank: Contributor
timestamp: March 28, 2017, 08:59:42 am
content: Hello,I got both the Rigol DG1022Z waveform generator and Rigol DS1054Z os oscilloskop, but the fan noise from them are really loud.I know that there are many instructions how to replace the fan in the Rigol DS1054Z os oscilloskop, but does anybody know if i can replace the fan in the the DG1022Z waveform generator, using the same fan type as the Rigol scope, or have anybody tried to replace the fan in the DG1022Z waveform generator?Thank you very much.

author: mtolesen
author_rank: Contributor
timestamp: March 29, 2017, 01:42:53 pm
content: Nobody knows about this...?

author: HighVoltage
author_rank: Super Contributor
timestamp: March 29, 2017, 02:09:17 pm
content: I would probably get a low noise fan and replace it and you will be good.Make sure the new fan has a airflow that is high enoughBut there are plenty of fans these days that have low noise and good airflow.I have no experience with the Rigol but I have exchanged lots of fans in Agilent gear.

author: guenthert
author_rank: Frequent Contributor
timestamp: March 29, 2017, 04:02:34 pm
content: Quote from: mtolesen on March 29, 2017, 01:42:53 pmWhat do you mean by 'loud'? Do you have any reasons to believe that the fan in your unit is louder than normal (i.e. defect or incorrectly mounted) or are you just not satisfied with its performance?Have you done some research yourself? At least the fan of the 1054z has been discussed here at length. In a quiet room it is audible, in a factory or even moderately busy lab I'd expect it to blend in to the background noise.I found it offensive and replaced the fan with a quieter unit. I think my oscilloscope gets now a bit warm, but since the ambient temperature is fairly low, I don't foresee a problem.

author: mtolesen
author_rank: Contributor
timestamp: March 30, 2017, 08:51:45 am
content: Hello guenthert,Well with "loud" i mean noisy, i have both instruments in my home lab with no background noise so when both instruments are switched on it is a bit too noisy.I do know that i can change the fan in the Rigol 1054a scope, but my question was more about the fan in the DG1022Z waveform generator which i also would like to replace and i was wondering if i can replace this fan with the same as the one in the Rigol scope?

author: Jeroen3
author_rank: Super Contributor
timestamp: March 30, 2017, 09:34:48 am
content: Open up the DG1022, check the fan specs, and find a more silent one with similar cfm.The noise however, could also be made by turbulence of the fangrill.
Correct cabling for standard transfer?  Other gotchas? - Page 1
Forum section: electronics / testgear

author: forrestc
author_rank: Unknown
timestamp: March 28, 2017, 01:22:10 pm
content: I was wondering if someone who knows what they are talking about would care to enlighten me about the correct cabling when doing a "standard transfer". In this case, what I'm specifically talking about is calibrating a precision voltage source from a freshly calibrated DMM, and then subsequently using that voltage source to calibrate some lower-accuracy DMM's.At the low end of the scale it seems I need some low EMF cabling. I think that what might work in this case is a POMONA 5291A banana to banana low-emf cable. Or more accurately 2 of them. At least for the two wire measurements - probably will get 4 for future use just in case. Is this reasonable for cases where there are Banana Plugs on both ends, which I think is the case in all of my cases?I'm assuming that voltage measurements are typicaly ok without involving sense wires at 3 ft with these cables. If not, how does one introduce sense wires without messing up the low-EMF nature of the cable?At the high end of the scale, it sounds like there may be some issues I need to be aware of with there being a lingering charge in the cabling system after having, as an example, 1kV of voltage on the test cabling. I think this is more of something I need to be aware of - that is, don't expect the 1uV range to be accurate for some period after having 1kV on the cabling.I think that's all the questions I know to ask... if there's some obvious gotcha that I am not likely to know about feel free to let me know as well. I've done similar calibrations before, but I haven't really cared about the level of accuracy I'd like to obtain here, so I'm trying to figure out all of the non-obvious pieces you need to pay attention to (and can accomplish with a semi-reasonable amount of effort and money) in order to avoid losing out on a bit of accuracy.
Keysight U1461A or Fluke 1587FC - Page 1
Forum section: electronics / testgear

author: JohnWW
author_rank: Contributor
timestamp: March 28, 2017, 10:59:06 am
content: Hello TeamLooking at buying a mutimeter with a insulation tester. What are our thoughts on the Keysight and the Fluke? Is anyone using the Keysight or Fluke reporting app?Thanks
Anyone is using Hioki CM4371. Your inputs are welcomed. - Page 1
Forum section: electronics / testgear

author: alt.ca
author_rank: Newbie
timestamp: March 28, 2017, 03:34:13 am
content: Hello,I'm thinking of buying (pretty soon) a Hioki CM4371. For all purpose use. Specs look fantastic.Any experience or opinion will be appreciated.Originally, I thought of buying a Brymen from TME (BM065/162 or 089 all AC/DC clamp meters). Prices (USD) seemed better. But if you add the shipping, Canadian duty fees etc. it becomes expensive.So if I buy it in States and shipping it at my US friend address I might pay bit more but I get a better quality. Don't I?Now, if anybody suggests any alternative solution it would be helpful.Thanks!
Looking for YOKOGAWA DL1640L Digital Oscilloscope service Manual - Page 1
Forum section: electronics / testgear

author: oois1
author_rank: Newbie
timestamp: March 27, 2017, 10:51:00 am
content: Dear all, anybody got this ancient granddaddy Yokogawa oscilloscope to share please?

author: nctnico
author_rank: Super Contributor
timestamp: March 27, 2017, 02:34:29 pm
content: I used to own a DL1740L which looks similar and I found the service manual here:http://www.ko4bb.com/getsimple/index.php?id=download&file=06_Misc_Test_Equipment/Yokogawa_DL1720__DL1740_4_channel_500MHz_digital_storage_oscilloscope_Service_Manual.pdfIt shows how to open the case but no schematics.

author: oois1
author_rank: Newbie
timestamp: March 28, 2017, 12:04:46 am
content: Oh thank you very much Nctnico!No worries with the schematic, I am fine with the performance verification portions.
DS1102D or USB logic analyzer or standalone? - Page 1
Forum section: electronics / testgear

author: CaptainNomihodai
author_rank: Contributor
timestamp: March 27, 2017, 06:12:32 pm
content: I'm looking to buy a logic analyzer and would appreciate some input as to what I should buy. I would be using it for microcontrollers like PIC, ARM, AVR, etc. Nothing too sophisticated. As far as I can tell, I have, broadly speaking, three options:1) Get a behemoth standalone logic analyzer from eBay (a new standalone is out of the question, since they all seem to be $10k+). These seem to have a lot of channels, tend to run Windows XP or the like, and are huge. I'm wary of this option because of the amount of space these would take up on my bench, and, if only just as a function of age, the hard drives in these things are probably nearing death.2) Buy a new MSO. Except for models way out of my price range, these seem to be limited to 16 channels (but I suspect that may be enough for my purposes?). I found a Rigol DS1102D for $400, which part of me is itching to pull the trigger on since I could use a modern scope anyway (my current scope is a Tek 2230), but I could have sworn I saw a video where Dave had a poor opinion of the digital functions on a Rigol MSO.3) Buy a USB logic analyzer. I had initially not considered this an option, assuming that USB logic analyzers were as useless as USB scopes, but reading threads on this forum has lead me to believe that a Saleae (or similar?) may actually be worthwhile. These seem to be able to do things with software like decoding which, after skimming the manual, it doesn't look like the aforementioned Rigol can do.In short, my immediate question is whether to buy that Rigol... 400 seems like a really good price, but I'm unclear as to the usefulness of the digital channels on that model. Any input is appreciated; I'm new at this so I'm sure there are considerations that haven't even occurred to me.

author: james_s
author_rank: Super Contributor
timestamp: March 27, 2017, 07:02:56 pm
content: I've had a few different USB instruments and have never really been all that happy with them but that could just be my experience. I've had driver issues, crappy software, etc but there may be some good ones out there. Personally I prefer standalone instruments, I got my logic analyzer for $25 although I had to spend nearly 10 times that to obtain a full set of probes. It's handy now and then but I don't think I'd bother for working with modern microcontrollers, a 4 channel DSO will do pretty much everything you need with those. I got the logic analyzer to work on 70s/80s arcade games and vintage computers where having a lot of channels is really handy. Microcontrollers lack exposed data and address buses so generally the most you need to do is look at things like SPI and I2C buses, a few random IO pins, etc.

author: CaptainNomihodai
author_rank: Contributor
timestamp: March 27, 2017, 07:08:28 pm
content: Quote from: james_s on March 27, 2017, 07:02:56 pmHmm, so maybe I should be looking into some of the more expensive MSOs (like those in the Rigol "z" series, I think) that do decoding?
Korad KAxxxxP USB Interface: Escape characters used? - Page 1
Forum section: electronics / testgear

author: pioupus
author_rank: Newbie
timestamp: March 27, 2017, 03:30:59 pm
content: Hi,I would like to buy a cheap programmable power supply. Since my software which shall control it only supports ascii commands/replies terminated with escape characters I would like to ask if there is anybody who already used the USB interface of the Korad KAxxxxP power supply and knows whether an escape character (like "\n" or "\r") is used?regards,Arne

author: markus-k
author_rank: Unknown
timestamp: March 27, 2017, 04:30:42 pm
content: According to this:https://sigrok.org/wiki/Korad_KAxxxxP_series#Protocolit's almost fully ASCII based without line termination or anything. So no, no escape characters are used. Only the status command seems to return a bitmask.
Rigol DG 2041A Count Function Missing - Page 1
Forum section: electronics / testgear

author: hexreader
author_rank: Frequent Contributor
timestamp: March 27, 2017, 04:07:01 pm
content: Couldn't resist buying Rigol DG 2041A Waveform generator at half price - even knowing it is obsolete - as 40MHz square wave TTL capability seems rare on affordable generators.What has me confused is that this site:http://www.batronix.com/shop/waveform-generator/Rigol-DG2041A.htmltalks about a count function and shows an LCD screen-shot with "count" clearly shown top left of screen.My DG 2041A is firmware version 05,12,00,03,07 but I cannot find any way to bring up "count" top left of screen despite trying many key combinations.The only mention of count in the manual is for burst mode, which I think is unrelated, but I tried many burst mode options just in case.Was the count function removed from later models of DG 2041A? was it never there? Is it there but I I am pressing the wrong buttons?Any light that forum members can shed will be much appreciated.Not very important, but I hate to think I might be missing out on something.
YTO for a HP 8593A - Page 1
Forum section: electronics / testgear

author: Phiphi95
author_rank: Newbie
timestamp: March 27, 2017, 02:37:33 pm
content: I have bought, some time ago on eBay, a HP 8593A 22 GHz spectrum analyzer.After setting a new battery and performing calibrations, it works not too bad but there are instabilities when displaying a signal, 300 MHz CAL output for example.After searching faults on different boards, I suspected the YIG oscillator (HP 5086-7833) to be the culprit.I have removed it and tested it alone :The output level is correct and I can explore all the range from 3 to 6.8 GHz but there are instabilities that I can see on my 8566 SA. I cannot say if it's output level going low for a short time or frequency shift.Do you think the YIG oscillator is dead or is there an hope to fix it ?Philippe
Hantek DSO7000B Scopes - How to make screenshots - Page 1
Forum section: electronics / testgear

author: arte.sea
author_rank: Newbie
timestamp: March 27, 2017, 12:29:37 pm
content: Hi,It is possibly embarrassing question, but: How do I make screenshots on Hantek DSO7000B Scopes?I have DSO7102B and I simply cannot find a way to make screenshot without calling up the tools menu and pressing Save Waveform button. It works but it also captures the 'tools' menu (see attached screenshot) while I wish to see 'measurement' or none at all on screenshot instead. I think other scopes have dedicated hardware button for that but not mine.Looked up in manuals, on-scope help etc, to no avail, that feature seems not to exist on those scopes. Bummer.See attached picture of the scope.Save / Recall button calls up save menu with lots of options to save settings, CSV etc, so it is not strictly a screenshot.
Calculators & DMMs:  Graphical Disconnect - Page 1
Forum section: electronics / testgear

author: MrCreosote
author_rank: Contributor
timestamp: March 26, 2017, 06:17:04 pm
content: Graphical charting displays are commonplace on calculators - and for low cost - even for the top brands.But this is not the case for DMMs.This makes no sense to me - I would have thought cross-pollination would have occurred by now - especially with the dog-eat-dog competition in Asia.Theories? Maybe it's Japanese -v- Chinese tech?

author: boggis the cat
author_rank: Regular Contributor
timestamp: March 27, 2017, 11:28:39 am
content: To make such functions useful you need fast signal acquisition, and that impedes accuracy (why oscilloscopes don't give good amplitude accuracy). The trade-off means that you can't get both without significant investment in design and high hardware costs, so you have very limited capability unless you want to pay significant money. The Keysight 3466x series gives what you're referring to, but it isn't a cheap option.If you just want low-speed data-logging, then Bluetooth is the way to go, with 'smart phones' being so cheap. The big names have started moving that way now, so the cheap brands will follow suit.

author: PointyOintment
author_rank: Frequent Contributor
timestamp: March 27, 2017, 12:23:14 pm
content: You don't need fast acquisition if you want to use it for datalogging. A friend of mine has aUni-T UT181A, which has a wonderful graphical display for datalogging, but does not have fast acquisition. Evidently there's demand for that kind of product.
34970a DAQ and SCPI fetch command while instrument is running? - Page 1
Forum section: electronics / testgear

author: julian1
author_rank: Frequent Contributor
timestamp: March 27, 2017, 05:28:28 am
content: After scanning is stopped/completed, it is possible to issue a scpi fetch? to retrieve all stored data over serial/rs232. Because observations are stored in memory - the same data will be returned each time fetch? gets called.The same fetch? command can also be issued when the instrument is running to retrieve historic observations - after which it will pause until the card inputs are sampled again - and those values will be outputted as a new row over the serial line. This behavior will then continue uninterrupted according to the sample interval - outputting a new row each time the inputs are read.What I would like to do, is to reset the fetch cursor to the beginning again, so that all historic is returned - but without having to stop the instrument. That way I can connect once a day and pull all stored data up to that point in time.Does anyone know if this is possible and how?
older tds tek scope bootloader - Page 1
Forum section: electronics / testgear

author: drforbin
author_rank: Regular Contributor
timestamp: March 27, 2017, 04:24:39 am
content: Can anyone fill me in on the commands which available on the old tds scopes when the protect switch is placed in unprotected position? From what I understand the scope enters a special bootloader mode which then listens on gpib address 29 and you can then send commands. I know of two M and m read and write. What is the format of these two commands and are there any others?Apparently tektool.c uses this API for which I have confirmed from looking at the source code.Thank you all.Drforbin.
R&S CMU200 GSM test features - Page 1
Forum section: electronics / testgear

author: sorenkir
author_rank: Regular Contributor
timestamp: March 25, 2017, 02:10:03 pm
content: Hi all,Just out of curiosity, I would like to try the GSM test features of my CMU200.I have tried to connect to a venerable Nokia 3310 with a test SIM card (http://www.ebay.com/itm/111602671512) following the guidelines atp. 2.14 ofOperating Manual / Software Options: GSM400/GT800/850/900/1800/1900-MS for CMU-B21(found therehttp://www3.rohde-schwarz.com/www/FileTranCS.nsf/alias/SR003M?OpenDocument) with no success.The manual says to connect the RF input RF2 to the antenna connector of the mobile. As the 3310 has no antenna connector, I have just put a small antenna on the RF2 connector of the CMU200.No matter what I try (GSM900, GSM1800, another phone, etc.), I cannot manage to connect to the mobile. Nothing happens on the Nokia, it does not see any network and does not receive any call.Does anyone has ever tried this (maybe the default configuration needs to be modified) ?Is this test SIM card OK ?Is a direct cable connection required ?Thanks,Michel.

author: richnormand
author_rank: Unknown
timestamp: March 25, 2017, 06:09:22 pm
content: I did exactly what you proposed with a small whip antenna and the same sims card in my old Nokia and Blackberry.After much exploration with signaling and non-signalling modes, RF power, layers of menues and following the R&S instruction with no results I decided to run the full self-test on the CMU200 for all combination of input/output settings.Found out the RxTx module was not putting any or hardly any RF power in several bands.Similar results for the old Motorola CDMA analog phone too.You can find my postings in the "repairs" segment of the forum for the RxTx module.It now works well by putting the phone right next to the antenna. The real test is by connecting the antenna test connector inside the phone to the CMU200 by a cable.Hope that helps. Best of luck.
XYZ Mode on a TDS784C - Page 1
Forum section: electronics / testgear

author: Tony_G
author_rank: Super Contributor
timestamp: March 24, 2017, 07:23:34 pm
content: Hi All,I borrowed a TDS784D to work on my HP 8340B Signal Generator and I'm trying to get the XYZ mode to work but not having much success.The 8340B puts out a Z-Axis signal that is +5V when there is no signal and should be blanking, 0V when there is signal and -5V when the sweep frequency is coincident with the marker. You can see all 3 of those features in this image (Ch3 is the 8340B Z-Axis in this case, Ch2 is an 8473C Crystal Detector and Ch1 is the 8340B Sweep Output):However when I turn on XYZ mode it isn't either blanking or showing the increased intensity for the marker:The manual refers to 5 divisions rather than volts so I've tried playing around with the vertical scaling for the channel (CH3 in this case) but that seems to have no impact.Does XYZ mode actually modulate the intensity as per the manual or is this the best I get and I should go buy an old analog scope? The reason I borrowed this scope was that my other digital ones either don't do anything with the Z or simply do the blanking so I can't get the marker.Any suggestions on what I may be doing wrong?Thanks,TonyG
Keysight DSOX1102G Upgrades - Page 1
Forum section: electronics / testgear

author: rfbroadband
author_rank: Unknown
timestamp: March 24, 2017, 03:42:50 pm
content: just received the Dual Channel scope DSOX1102G.None of the upgrades that I purchased (BW, serial decode) were installed.Could someone please confirm the following:- the 70MHz label on the scope will be replaced with a 100MHz label if the BW upgrade was installed.- The AutoScale and Default Setup buttons are recessedthanks

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: March 24, 2017, 04:45:35 pm
content: Hi, could you please PM me? We'll make sure you get taken care of, thanks!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 24, 2017, 04:48:23 pm
content: Quote from: rfbroadband on March 24, 2017, 03:42:50 pmYes.

author: rfbroadband
author_rank: Unknown
timestamp: March 24, 2017, 06:44:19 pm
content: thanks for the response.BTW, issue is resolved, I installed the license keys.
DIY low cost HP/Agilent 53131/132/181 Timebase - Page 1
Forum section: electronics / testgear

author: gamalot
author_rank: Super Contributor
timestamp: March 24, 2017, 12:43:33 am
content: STM32F030 MCU is used as serial interfaceA/DD/A converter instead of the old expensive AD7243.I have made a prototype and tested it on all three models of 531xx series, it works.

author: awallin
author_rank: Frequent Contributor
timestamp: March 24, 2017, 05:46:47 am
content: If the ocxo is tuned from a DAC then there is no option for locking to an external reference?

author: gamalot
author_rank: Super Contributor
timestamp: March 24, 2017, 09:11:49 am
content: Quote from: awallin on March 24, 2017, 05:46:47 amNo, but there will be an additional item in the calibration menu.
GW Instek Announces New MSO 2000 - Page 1
Forum section: electronics / testgear

author: Asymmetric13
author_rank: Unknown
timestamp: February 21, 2017, 09:11:18 pm
content: "MSO-2000, a mixed-signal oscilloscope, is developed from the high performance software and hardware platforms of GDS-2000E, which boasts the superb functions including the highest waveform update rate of 120,000 wfm/s in the same class and 10M memory depth per channel to allow users to completely retrieve and analyze waveforms. . The series includes MSO-2000E and MSO-2000EA. MSO-2000E has a built-in 16-channel logic analyzer and MSO-2000EA has a built-in 16-channel logic analyzer and a dual channel 25MHz arbitrary waveform generator.For MSO-2000E, its 16-channel logic analyzer has the memory depth of 10Mpts per channel, which can retrieve more and longer digital signals as well as clearly display digital signals to obtain sufficient information for analysis. The standard bus trigger and decoding functions include I2C, SPI, UART (RS232/422/485) and CAN/LIN bus for automotive communications. Serial bus waveforms can be triggered and decoded in real time. Via the waveform search function, the desired signals can be identified for analysis and debugging. The feature of converting digital signals into analog signals allows MSO-2000 to observe analog waveforms and abnormal digital signals simultaneously so as to clearly differentiate the cause of abnormal signals. The digital channel of MSO-2000E features high signal sensitivity, long record length and high sample rate. The minimum input swing of logic analyzer represents the minimum operating voltage of ±250 mV, which demonstrates that digital channels are highly sensitive with respect to input. MSO-2000E offers complete analysis and debugging capabilities with the economical pricing."Press Release:http://www.gwinstek.com/en-global/news/28/140236Product Page:http://www.gwinstek.com/en-global/products/Oscilloscopes/Digital_Storage_Oscilloscopes/MSO-2000_SeriesI would be very interested to see a teardown (and review in due course) of this device, to confirm if it is leveraging the same core Zynq platform as the 2000A and 2000E series that have come before it.

author: norks
author_rank: Contributor
timestamp: March 23, 2017, 03:59:39 am
content: These scopes are listed on tequipment now. I compared the current sale prices and noticed the pricing rises steadily with upgrades except for the top model (4ch, 200mhz), which is slightly cheaper. Maybe it hit a ceiling or it's an incentive to get the best one.
Lab power supply  - Page 1
Forum section: electronics / testgear

author: dylan0806
author_rank: Newbie
timestamp: March 22, 2017, 08:50:59 pm
content: Hi guys,I'm looking for a bench power supply normally i can use some wall brick I have laying around but I want to upgrade,I have looked at the Korad KA3005P and found out there were some problems with them in the past.Do you guys have any other suggestion I would like a double power supply from 0-20V and 0-5A and a budget of 200-350 euro total.thank you.

author: dacman
author_rank: Frequent Contributor
timestamp: March 22, 2017, 09:28:04 pm
content: Models such as Tenma 72-10495 or 72-2645 or 72-2640 are available from Farnell.

author: Mr. Scram
author_rank: Super Contributor
timestamp: March 22, 2017, 09:52:45 pm
content: Quote from: dylan0806 on March 22, 2017, 08:50:59 pmDoesn't Dave sell those in his shop?

author: dxl
author_rank: Regular Contributor
timestamp: March 22, 2017, 10:52:15 pm
content: I'm using two HP6632A since ~10 years and i'm quite happy with them. Basic specs are matching your requirements pretty well. They also fit your budget - usually they go for 100-200 US$ used.

author: jpb
author_rank: Super Contributor
timestamp: March 22, 2017, 10:52:48 pm
content: Is the 5A per outlet or for the two combined?If you need the higher current then this will probably mean that you will need to go switched mode which will be noisier than a linear supply. My dual linear supply is 0-32V and 0-2A but I can combine the two to give 4A or 64V.It might be worth thinking about getting a TTi supply off ebay or, if you can stretch to it, the EL302RD new:http://uk.farnell.com/aim-tti-instruments/el302rd/power-supply-2ch-30v-2a-adjustable/dp/1670781Though this is only 2A per channel or 4A combined.
Slight rant about my Extech 382275 - Page 1
Forum section: electronics / testgear

author: xenocide702
author_rank: Contributor
timestamp: July 09, 2014, 12:19:03 am
content: I had my previously trusty extech supply set at 15 A constant current at around 6 V, when it suddenly died. No volts on the output (with no load), panel meters reading zip. The knobs still respond and the set voltage shows up, but nothing on the output. It gives a message Op OFF on the display on reboot. There's no enable button on this thing apart from the remote control on the back, which is disconnected and disabled.So I lift the skirt to have poke around and I find this little bastard of a fuse. Who puts a fuse socket surrounded on all sides by gigantic components!?The heatsinks are screwed in such that the screwscannotbe removed without desoldering components

author: SeanB
author_rank: Super Contributor
timestamp: July 10, 2014, 05:11:21 pm
content: High carbon steel wire bent into a hook will get it out easily. Use a small screwdriver and a small piece of blue tac or similar to hold the new one to the tip when replacing it. Really bastard would be that they placed the fuse in there and then placed a sleeve over it for "extra protection" and some swine assembler was a little generous with the RTV adhesive and stuck it down to the board and the heatsink.

author: xenocide702
author_rank: Contributor
timestamp: July 10, 2014, 06:23:27 pm
content: I considered trying to get it out with a bent wire or something, but ended up just yanking the big cap. It only took a few minutes with lots of flux and some solder braid (all glory to my JBC iron).The new fuse didn't blow again (and the old one certainly was blown), but I still get no outputI'll dive a little deeper this weekend...

author: cinetron
author_rank: Contributor
timestamp: March 22, 2017, 07:07:58 am
content: I realize this is an old thread but I was wondering if the original poster had any luck fixing his 382275 . I have a dead one now as well and would like to know if he ended up finding the issue he was having with his.
Reasonable cheap linear power supplies available in the UK - Page 1
Forum section: electronics / testgear

author: SingedFingers
author_rank: Frequent Contributor
timestamp: March 21, 2017, 06:29:18 pm
content: Can anyone suggest a reasonable quality cheap, new linear power supply available in the UK?Need 0-20v volts, 0-3A current limit, digital readout of current and voltage simultaneously, CC/CV indicator and an output enable switch that defaults to OFF. Current damping would be nice to stop the magic smoke escaping. Budget is about £120.I've got a couple of Thurlby PL310's and an E3630A but I need MORE POWER for a project so the PL310's are going to fund this. Has to be a new unit. I don't want to bugger around with fixing and checking something out first for once.I am expecting Chinese crap for my money, even Mastech, but preferably stuff that doesn't burn the house downCurrently considering:https://www.rapidonline.com/rapid-hy3003d-single-output-bench-psu-lcd-1x0-30v-0-3a-85-1935... an Mastech HY3003D variation.

author: tggzzz
author_rank: Super Contributor
timestamp: March 21, 2017, 06:44:43 pm
content: Well, if you drop the "new", you could have a nice HP6632A 20V +5Aand-5A system PSU for that price. Yup, it sinks 100W as well as sources 100W. I haven't tested the sinking nor the GPIB, but otherwise it works as far as I can tell.FFI seehttp://www.keysight.com/main/techSupport.jspx?cc=GB&lc=eng&nid=-536900193.536900281&pid=6632A%3Aepsg%3Apro&pageMode=OVand PM me if interested.

author: SingedFingers
author_rank: Frequent Contributor
timestamp: March 21, 2017, 06:47:30 pm
content: I had a small fire yesterday inside a dodgy NAD amp. The output drivers left the building. Second hand is off the negotiating list with TPTB (SWMBO) at the moment. Even if Chinese ones explode I can point fingers elsewhere

author: tggzzz
author_rank: Super Contributor
timestamp: March 21, 2017, 06:56:45 pm
content: Quote from: SingedFingers on March 21, 2017, 06:47:30 pmOh, come on. This isHPafter allAnd you could see it working on April 30th, if you wanted to de-risk it further. Bring SWMBO and allow her to prevent you buying much more expensive stuff

author: SingedFingers
author_rank: Frequent Contributor
timestamp: March 21, 2017, 07:01:47 pm
content: I'm working on itShe has expressed precisely no interest in going on the 30th and said "would I take you to a craft fair?". Phew

author: Kleinstein
author_rank: Super Contributor
timestamp: March 21, 2017, 07:23:33 pm
content: If you need 0-3 A and look at the cheap Chinese ones, get one for 5 A - that size might be able to actually deliver 3 A without overheating. The main trouble with the cheap ones is that they are not really made for there rated current - that is more like a short time peak load, but nothing to use for a longer time. Otherwise they might not be that bad.
TDS5054B options - Page 1
Forum section: electronics / testgear

author: andy2000
author_rank: Frequent Contributor
timestamp: March 21, 2017, 05:11:41 pm
content: Has anyone successfully enabled options on a Tek TDS5054B? I'd like to enable the full 16M record length if possible.I've been playing with a TDS7000 series key gen which does seem to support the TDS5000 series, but the keys it generates aren't accepted by the scope.
Kyoritsu and Amprobe clamps service information - Page 1
Forum section: electronics / testgear

author: PA4TIM
author_rank: Super Contributor
timestamp: March 20, 2017, 08:16:42 pm
content: I added two clampmeters to my vintage meter collection.This beautiful Kyoritsu KEW SNAP.I would like some documentation and more information about this beauty.Does anyone know what those screw-banana connectors are . I have the resistance probe but not the normal probes.How old is it ?http://www.pa4tim.nl/?p=5846for picturesThere is no modelnumber on the scale.I? looks like new. I have not opened it yet because I have no service info and I am afraid to mess up the turred and clamp mechanism . (you know that feeling ? you know you should not have done that after you hear poiiiing and in a flash you see some very small objects dissapering to the area under your desk, also called the bermuda-triangle for small parts)An Amprobe ACD1http://www.pa4tim.nl/?p=5842for picturesIt workes but needs some adjustments. I found a user manual leaflet but no service doc. It has a row trimpots and without service info I'm not going to mess with them.I have no probes for this one. The resistance probe input has a connector that looks like a small audioplug. The 2 in the bottom looks like they are some kind of bajonet plugs.I tried to upload the pictures but nothing happens

author: PA4TIM
author_rank: Super Contributor
timestamp: March 21, 2017, 02:15:32 pm
content: Hmm, I could have known this before, it is not Chinese so nobody knows
Anyone have the Keithley 2910 Siggen Firmware ? - Page 1
Forum section: electronics / testgear

author: elmohandis
author_rank: Contributor
timestamp: March 21, 2017, 02:23:38 pm
content: Hi Everyone,I am looking for the Keithley 2910 Siggen Firmware. Does anyone have a copy of it?Tektronix and Keysight sent me back and forth between them only for Keysight to say at the end that they will not support the old Keithley equipment...Thanks!
math operation on digol ds1000z series - Page 1
Forum section: electronics / testgear

author: ingeom
author_rank: Newbie
timestamp: March 28, 2017, 02:16:35 am
content: i would like to display in a channel a voltage on a shunt resistant but in amp unit using a math operation for instance CHA / r_shunt.is it possible?thanks

author: alsetalokin4017
author_rank: Super Contributor
timestamp: March 28, 2017, 08:22:32 am
content: It is possible but not really straightforward.Look at the Probe setting in the Channel menu. Note the large variety (16) of multiplication choices there. And in the Unit setting, you can choose "A" for amps.So you have to do a little math outside the scope. In the simplest case, say you are using a 1 ohm shunt and monitoring the voltage across this shunt with a direct connection, no probe (or 1x probe). So you choose "1x" for the "Probe" and "" for the Unit. Then your channel display will be correct in Units and numerically, and display reading in Amps, and you can then use the scope's Math for, say, CH1 (amps) x CH2 (volts) and get a result correctly displayed in watts on the Math channel.So you have to choose your shunt resistance and Channel probe attenuation values so that you can set the "Probe" value from the 16 choices available in the Probe menu to have the correct numerical current value displayed on the channel.Yes, it's a pain all right, but it can be done. Another even more "kludgy" way of doing it is to provide a constant voltage on one channel and then use that as the "constant" for a Math operation like CHA/constant.Why Digol....er, Rigol didn't simply provide the ability to enter and use a constant in the Math operations is beyond my ability to explain, except to fall back on the old "it's only 400 dollars, what did you expect".By the way your "poll" doesn't make sense to me.

author: MrW0lf
author_rank: Frequent Contributor
timestamp: March 28, 2017, 09:00:09 am
content: Maybe you get some ideas from here also:https://www.eevblog.com/forum/testgear/help-please-understanding-rigol1054z-dc-rms-measurement/msg1090408/#msg1090408I tried to help someone in getting channel calibrate for zero using "bogus operation" method.
Best DS1054Z Case? - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: January 07, 2017, 09:45:01 pm
content: So long, and thanks for all the fish.

author: Howardlong
author_rank: Super Contributor
timestamp: January 07, 2017, 10:36:19 pm
content: The Rigol case is really pretty good, far better than those offered by Keysight and Tek for their lunch box form factor scopes. It is well padded and despite being compact it has plenty of pockets for probes, multimeters and small bits of other paraphernalia you may have.It also has a sleeve at the back so you can hook it directly onto your favourite rollaboard bag's extending handle, so you can take it on holiday and entertain yourself while the family make busy with beach nonsense.

author: tooki
author_rank: Super Contributor
timestamp: January 07, 2017, 11:59:55 pm
content: I use a Stanley 12" tool bag that cost about $15, into which the DS1054Z fits perfectly, with room for the accessories. The specific bag model I have is now discontinued (the new version is about $12 on Amazon, but I can't confirm the fit), but I am confident you could take your scope to Home Depot and Sears and find a toolbag that fits equally perfectly.

author: I4E
author_rank: Regular Contributor
timestamp: January 08, 2017, 04:00:42 am
content: Hi RoyOUr google plus page needs updating on it but if you page down you can see real pictures of the bag.https://plus.google.com/+Instruments4EngineersLtdStockportIt is a nice bag and more sturdy then I thought it would be.Have a great day!Joy TorresInstruments 4 Engineerswww.instruments4engineers.comAuthorized Rigol UK distributor

author: alsetalokin4017
author_rank: Super Contributor
timestamp: January 08, 2017, 05:58:40 am
content: Not the best quality video, sorry about the poor lighting... but here's a little review of the Rigol bag:

author: t_i_t_o
author_rank: Contributor
timestamp: March 20, 2017, 01:33:23 pm
content: Hi,I've searched a lot for the perfect low cost DS1000X bag and I found it:http://www.ebay.com/itm/Minolta-Padded-Camera-Bag-Case-Free-UK-Post-/272564747067http://www.ebay.com/itm/Minolta-Padded-Shoulder-Photo-Camera-Bag-Free-UK-Post-/272587666830http://www.ebay.com/itm/PADDED-MINOLTA-CAMERA-CASE-BAG-/122403278165The scope fits perfectly in the upper Minolta camera bag. It is padded. The pockets are great for the power cord and the probes.

author: Fungus
author_rank: Super Contributor
timestamp: March 20, 2017, 03:34:50 pm
content: The official one?http://images.batronix.com/products/accessories/Rigol-Bag-800-485.jpg

author: K5HJ
author_rank: Regular Contributor
timestamp: March 21, 2017, 02:04:10 am
content: I use this one:http://www.harborfreight.com/12-in-tool-bag-61467.htmlPaid $5.99 but sometimes it's on sale for $4.99Randy
GW-Instek GPD-3303S alternatives - Page 1
Forum section: electronics / testgear

author: ITman496
author_rank: Regular Contributor
timestamp: March 18, 2017, 03:37:56 am
content: I'm looking at the GPD-3303S on ebay for roughly 140-170 shipped depending on the day.Right now I have a Trygon HR40-5B (good luck finding any info on that) its a linear 0-40v 0-5A CC/CV power supply with analog instrumentation. It's fairly old, with a last-cal date from its military lab it came from dating 1987. So who knows.I love it, its a great supply, but I want a digital supply, with more then one channel. Just to bolster my ability to do more then one thing at once. I have a converted ATX psu for 3.3-5-12v but I dont like that if I get something wrong, that thing explodes, because no limiting current.So I found the GW-Instek supply. It's fairly cheap and good looking!What I want to ask, before I buy that, is.. is there any alternatives that are good, cheap, and have similar features to it? (good quality digital multi-channel, or single channel but half the cost so I can get two)I refuse to use those generic brand 0-30v 0-3 or 5a ones with the knobs. I want something that I set the voltage with an encoder. I'm tired of very gently and gingerly adjusting a course and fine pot knob. I also really desire a digital output on-off button.(also is this the right topic? I'm not so sure.)Thanks!

author: Housedad
author_rank: Frequent Contributor
timestamp: March 18, 2017, 03:57:47 am
content: If you get the 3303s, get the earlier version. There is averyminor issue with the fixed power output (output 3) that has a voltage spike on power up on the newer model. There is also a thread here on the issue and it has a fix for it if you think it might be a horrible problem. I have 2 units, the older and newer used from the ITT selloff. They both work great, and the displays are pretty dang accurate to a couple of Mv.

author: Housedad
author_rank: Frequent Contributor
timestamp: March 18, 2017, 04:01:03 am
content: Also, the 3303s has one encoder that does both fine and course adjustments. You still have to fiddle with it. Course to fine and back is changed by pressing the encoder.

author: ITman496
author_rank: Regular Contributor
timestamp: March 18, 2017, 04:56:32 am
content: Still less touchy then my current psu, though, I'm sure. It has half turn pots and they are quite sensitive..

author: nctnico
author_rank: Super Contributor
timestamp: March 20, 2017, 06:33:34 pm
content: I'm torn between a used GW Instek GPD-3303S and a new GW Instek GPE-2323:At the current Ebay prices + shipping the GPD-3303S is just as expensive for me as the GPE-2323 and the GPE-2323 has individual controls for current & voltage.

author: Jono427
author_rank: Contributor
timestamp: March 20, 2017, 06:52:00 pm
content: GW-Instek GPD-3303S is what I just decided to go with. So far so good, but only had it for 2 weeks. Still need to check mine for the spike on CH3, but output looked good. Will have to remember tonight.
DG1000Z ARB and Ultrawave Software. Is it compatible? - Page 1
Forum section: electronics / testgear

author: nealz
author_rank: Unknown
timestamp: March 19, 2017, 07:49:23 pm
content: I just got a new DG1032z ARB in on Friday. I really like it.https://www.eevblog.com/forum/Smileys/default/clap.gifHowever I am trying to upload a waveform I created in Rigol Ultrawave software and cannot upload it to the ARB.Has any one used Ultrawave with a DG1032z ARB?I tried using the USB to upload and that did not work. It maybe as I am on a Mac with Windows 10 as Virtual Machine.So I tried to save the file to a Flash drive but the ARB does not recognize the .rdf file.Thanks in advance,Neal
KEITHLEY 3322 service manual ? - Page 1
Forum section: electronics / testgear

author: coromonadalix
author_rank: Super Contributor
timestamp: March 19, 2017, 04:01:04 pm
content: Has anyone have the "Full" service manual And the "schematics", thoses found on the web are incomplete and or sometimes poor qualityThksdarn posted in the repair section by mistake, but i will have to do calibration eventually.
Leader LV5150D Waveform Monitor User Guide? - Page 1
Forum section: electronics / testgear

author: dexters_lab
author_rank: Unknown
timestamp: March 18, 2017, 11:06:19 am
content: i don't suppose anyone has a user guide for a Leader LV5150D HD Waveform Monitor? (hd analog/digital video waveform/vectorscope)i have tried all the usual places like elektrotanya etc

author: amspire
author_rank: Super Contributor
timestamp: March 18, 2017, 02:09:12 pm
content: This is the only thing I can suggest - costs money unfortunately.http://www.ebay.co.uk/itm/Ultimate-LEADER-Repair-Service-Maintenance-Owner-Manuals-330-PDF-manual-s-DVD-/122038794984

author: dexters_lab
author_rank: Unknown
timestamp: March 18, 2017, 07:57:10 pm
content: thanks, i'll keep that as option 2... i'll see if Leader can email me a copy of it first off