hybridfree/eevblog-posts huggingface dataset:
Triplett new multimeter 9065 info? - Page 1
Forum section: electronics / testgear

author: zaoka
author_rank: Frequent Contributor
timestamp: January 27, 2016, 01:44:55 am
content: Anybody tested these new Triplett multimeters?? Looks like its USA made...http://www.triplett.com/shop/data-logger-digital-multimeter-model-9065/

author: EEVblog
author_rank: Unknown
timestamp: January 27, 2016, 01:57:52 am
content: Interesting.The only two USA multimeter factories I know of are Fluke and UEI

author: ataradov
author_rank: Super Contributor
timestamp: January 27, 2016, 01:58:20 am
content: "Coming Soon – October 2015".How do you even get one? I clicked on a few distributors from the list and got absolutely nothing.

author: EEVblog
author_rank: Unknown
timestamp: January 27, 2016, 01:58:55 am
content: My imagination or does it look like a Uni-T?

author: EEVblog
author_rank: Unknown
timestamp: January 27, 2016, 01:59:40 am
content: Any meter that needs charging can't be very usable.

author: ataradov
author_rank: Super Contributor
timestamp: January 27, 2016, 02:00:04 am
content: Quote from: EEVblog on January 27, 2016, 01:58:55 amIt very well may be. Triplett seem to make all sorts of stuff, including $5 flashlights, which obviously come from the same source as free with $25 purchase from Harbor Freight.

author: ataradov
author_rank: Super Contributor
timestamp: January 27, 2016, 02:04:46 am
content: It is UT181A with exact same graphic. Their Photoshop skills are on point.http://www.uni-trend.com/en/product/2014_0711_586.html

author: EEVblog
author_rank: Unknown
timestamp: January 27, 2016, 02:49:07 am
content: Quote from: ataradov on January 27, 2016, 02:04:46 amSo most definitely not made in the USA

author: ataradov
author_rank: Super Contributor
timestamp: January 27, 2016, 02:51:48 am
content: Quote from: EEVblog on January 27, 2016, 02:49:07 amI doubt it is made at all. Triplett is one of those "take any junk you can get your hands on and put your logo on it" companies. Probably did not work out that way with this meter.

author: zaoka
author_rank: Frequent Contributor
timestamp: January 27, 2016, 03:01:39 am
content: its Chinese crap, sorry.Cant believe Triplett went this way...

author: retiredcaps
author_rank: Super Contributor
timestamp: January 27, 2016, 06:09:00 am
content: Quote from: EEVblog on January 27, 2016, 01:57:52 amKlein MM5000 and MM6000 made in USA (lot of parts probably from Fine Instruments). Very similar to the UEI in Dave's $100 shootout.http://www.kleintools.com/catalog/multimeters/electricians-trms-multimeterhttp://www.kleintools.com/catalog/multimeters/electricians-hvac-trms-multimeterhttps://www.eevblog.com/forum/testgear/klein-tools-mm2000-multi-meter-review/http://www.finest.co.kr/html/pro_02.html
Noise display on 16702A with 16555D cards - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: January 26, 2016, 06:09:14 pm
content: Evenin'I'm currently trying to capture some simple I2S waveforms coming from a Carambola2 WLAN module and a Keystone DAB+/FM module...The waveforms look nice on a cheapo Saleae clone...though it is limited to 12Msamples/sec....So I fired up my 16702A with 16555D cards....and oddly...as soon as I want to capture more than 1 or 2 signals...I see clock noise...The first waveform is just a capture of the WORD and SCLK signal...The second picture is with additional MCLK signal...Any ideas? I always connected each pair of the pod (signal/ground) to the device...

author: davorin
author_rank: Unknown
timestamp: January 26, 2016, 06:41:00 pm
content: Hmm...after fiddling around a bit with the pod settings the waveform looks now good....though dunno why the big difference...Before was set to LVCMOS and now to CMOS 5V....although the signals itself are 3V3 outputs....
Benning cm 11 low current clamp - Page 1
Forum section: electronics / testgear

author: DuPe
author_rank: Regular Contributor
timestamp: January 22, 2016, 08:55:19 pm
content: wondering if anyone owns the benning cm11 current clamp and is willing to share his/here experience.Especially interested in the low current performance.Thanks in advancehttps://www.reichelt.de/?ARTICLE=153779&PROVID=2788&wt_mc=amc141526782519998&gclid=CIvlxc2xvsoCFeTnwgod7rYHdwPeter

author: DuPe
author_rank: Regular Contributor
timestamp: January 22, 2016, 09:49:12 pm
content: International linkhttp://de.benning.de/en/corporate/products-services/testing-measuring-and-safety-instruments/current-clamp-multimeter/benning-cm-11.html

author: lem_ix
author_rank: Regular Contributor
timestamp: January 22, 2016, 11:59:38 pm
content: No idea about current clamps but some Benning gear seems to be a rebrand of Appatech. There are a few reviews of Appa clamps on youtube. Hope that helps.

author: DuPe
author_rank: Regular Contributor
timestamp: January 26, 2016, 05:22:54 pm
content: Thanks lem_ix for your hint.But this particular model seems to be sold actually only as genuine Benning model.CheersPeter
Hacking an HP 6626A into a 6629A, by swapping output boards - Page 1
Forum section: electronics / testgear

author: SharpEars
author_rank: Unknown
timestamp: January 19, 2016, 05:42:59 pm
content: The question is, would this work? It has two low power boards (25W) and two high power boards (50W). What if I were to pop out the low power boards and replace them with high power boards. Would the device function properly (i.e., is the logic of what an output is capable of in the output itself, or "higher up")?You can see the datasheet describing the two supplies at:6620A Series Precision Multiple-Output, 25-50 W DC Power Supplies, GPIBIt seems like a lot of parts between the two supplies are the same, so I am wondering if just switching output boards will do the job.

author: Le_Bassiste
author_rank: Frequent Contributor
timestamp: January 26, 2016, 01:42:56 pm
content: perhaps you just swap the internal RJ-45 connections of a low- and high-power board and then check whether you still have full control over these.if not, or if the selftest on startup (if enabled, that is) throws an error, you probably need to modify the ROM contents on the GPIB card.tbh though ,i doubt that the GPIB will throw an error, simply because all 4 control processors on the power boards share the same partnumbers.
JBC CD-1B3 VS HAKKO 951 - Page 1
Forum section: electronics / testgear

author: injan
author_rank: Newbie
timestamp: November 26, 2015, 06:42:03 pm
content: Hi everybody, i am thinking in getting a new soldering station and had in mind the JBC CD-1BE, and i wanted to know if the jbc cd-1be is better than the hakko 951, i have a repair shop fixing computer laptop logic board and cell phone logic board, which one would be better?

author: Muxr
author_rank: Super Contributor
timestamp: January 26, 2016, 07:22:02 pm
content: Metcal MX-500P is your other option. You can usually find a used psu base on ebay for around $150. Invest another $150-200 in brand new hand piece and auto-sleeper workstand. And you get a really nice pro grade soldering station. Later you can add a second hand piece for simultaneous use of multiple tips. The tips are plentiful, and the system is a dream to work with. Better quality than JBC and Hakko imo.

author: GreyWoolfe
author_rank: Unknown
timestamp: January 26, 2016, 07:44:36 pm
content: I have the Metcal MX-500P with a NOS RM-3E wand/sleeper stand and Talon tweezers with stand. I got a great deal on mine and I am all in with 6 tips for about $200 USD. I also have the Hakko FX-951 that I bought from TEquipment.net and all in with 4 extra tips, 5 tip holders and an extra brass curl for $283 USD with the EEVBlog discount. They are both high quality pieces of equipment and I enjoy using both. Tip changes are very easy on both and Hakko tip quality and longevity (with proper care) is well known. I will also state that I have never used JBC equipment and when I was looking at upgrading my iron, I looked at JBC. For hobbyist use, I couldn't justify the $160 price difference over the Hakko package and the JBC didn't come with tips. The Metcal came along a couple of months after I bought the Hakko and I wasn't going to try to return it at that point. If the Metcal would have come along first, I wouldn't have bought the FX-951 and I would have kept my 936 as the 2nd iron. As it was, I sold the 936 with tips and spare power supply for a decent price which recouped a little of the money spent.So, after being long winded, I agree with Muxr. If you can score a Metcal, do so. If not, take the FX-951 for a test drive. If you don't like it, return it and try the JBC. And if that doesn't float your boat, try an ERSA ICON Nano.

author: commongrounder
author_rank: Frequent Contributor
timestamp: January 26, 2016, 08:07:16 pm
content: I vote for the JBC. I did a fair amount of research before buying and haven't regretted it. It gets heavy use, every day, in my business and is a stellar performer. I get excellent results with all manner of soldering situations with plenty of power. Changing tips is fast and easy. I can go from a surface mount part to a steel chassis in a few seconds. Fantastic. I don't doubt that Metcal and the others are great as well, but just want to be sure that you know that JBC is right up there with them (I'm not gushing...really!)
Brymen BM869 and the mysterious 869-P9 display - Page 1
Forum section: electronics / testgear

author: android
author_rank: Regular Contributor
timestamp: February 27, 2015, 08:19:18 am
content: Rather than reopenan old thread, containing the following...Quote from: Lightages on March 05, 2013, 05:54:11 am...I'm wondering whether it's not "P9" at all but rather 7-segment display speak for "Pg"? ...perhaps the first step in setting the meter into "Program" mode so that the firmware can be updated over the USB interface

author: Lightages
author_rank: Unknown
timestamp: February 27, 2015, 08:21:31 am
content: I guess I should ask Brymen now I am selling their meters. I might not be able to tell anyone though!

author: eeadata
author_rank: Contributor
timestamp: January 25, 2016, 07:18:14 pm
content: What is the deal ? Any reply from brymen ?

author: Deckert
author_rank: Regular Contributor
timestamp: January 25, 2016, 11:25:50 pm
content: I'm guessing it has something to do with the firmware version. I have the BM867and it also shows 869-P9 when holding down REL on power-up.On my Brymen BM821, it shows 82-d when I hold down REL on power-up.--deckert

author: Lightages
author_rank: Unknown
timestamp: January 26, 2016, 12:53:49 am
content: Yes, I forgot to ask Brymen. I will get on it. Like I said, I might not be able to reveal their answer.

author: Lightages
author_rank: Unknown
timestamp: January 26, 2016, 04:34:27 am
content: From Brymen: "Those are our internal control numbers. They are not for customer use."
Can an Aim-TTi EX354RT PS Outputs be Connected in Parallel?                    - Page 1
Forum section: electronics / testgear

author: WCarp
author_rank: Newbie
timestamp: January 23, 2016, 02:34:19 am
content: Can an Aim-TTi EX354RT power supply (PS) main outputs (2 x 35V at 4A) be connected in parallel? The manual isn't clear on this. It says that it can be connected to other supplies in parallel. The PS has fully floating main output.Thanks

author: voltsandjolts
author_rank: Unknown
timestamp: January 23, 2016, 09:48:32 am
content: Yes.From manual:The unit can be connected in parallel with others to produce higher currents. Where several units are connected in parallel, the output voltage will be equal to that of the unit with the highest output voltage setting until the current drawn exceeds its current limit setting, upon which the output will fall to that of the next highest setting, and so on. In constant current mode, units can be connected in parallel to provide a current equal to the sum of the current limit settings.

author: WCarp
author_rank: Newbie
timestamp: January 24, 2016, 05:33:34 am
content: I am asking if the main outputs of the PS can be connected together in parallel. I already know that the PS can be connected with others in parallel.

author: voltsandjolts
author_rank: Unknown
timestamp: January 24, 2016, 09:45:52 am
content: If you stop and think about it for a second you will realise there is no difference between an external supply and the isolated supplies you have. They just happen to be in the same enclosure.
( Product Review )  UNI-T UT15C  Volt Stick  IP65 CAT IV 600V - Page 1
Forum section: electronics / testgear

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: July 30, 2011, 12:30:21 am
content: There is not much to say when you buy one such Volt Stick,the functionality is well presented by the LED and the labels on it.The latest and most modern version of those is the one with the LCD,working as voltmeter.This specific LCD actually steals 1-3V from the input voltage so to use it so to power on it self.And so the reading it is a bit off by 1-3V.Every electrician who had seen this specific version, he had fall in love with it,because it has the continuity mode ( powered by two AAA batteries) among the other functions.The Volt Stick needs the batteries only for the continuity mode, and to power one small torch light ( LED) at the direction of the probes, so to be able to see where the probes gets in.The specific volt stick can do everything:Voltage AC/DCDC PolarityPhase sequence detectionContinuitySingle hand operation.The specific design is so successful and fresh ( 2010 ),and the market started to fill up with such clones in a record time.The body of it, it is totally sealed, it’s impossible to open it for a teardown.For detailed specifications download the manual.www.uni-trend.com/manual2/UT15ABC.pdfThe cable of it has markings:AWM 1803 E199279 VW-1 80 Celsius 18AWG 2000V LEO HUII selected the UNI-T clone, because it was the most reasonable priced.I did tested it, works well, its simple to use.There are no safety concerns by my opinion all those clones are made by the same materials.Dislikes:The buzzer it’s not that powerful (but good enough)The ends of the probes, looks a bit more exposed than it should,If you thinking to work on electrical panels.If all that you need is to stick it in a wall plug, it is ideal for the task.Conclusion:The most talented Volt Stick, in the market today.I do not believe that some one could possibly think to add another one function on it.And so this design will live as long there is mains plugs in our planet.IP65 CAT IV 600VCheck the pictures and see it in action too.Kiriakos Triantafillou – Greece

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: July 30, 2011, 12:32:44 am
content: More pictures ( Action shots )

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: July 30, 2011, 10:18:16 pm
content: If it happens to own one like this from another brand, please post similar pictures of it.I would be more than interested to learn, if some one could possibly spot any differences.

author: Cliff Matthews
author_rank: Unknown
timestamp: January 23, 2016, 02:08:51 pm
content: OK for the money?Joe Smith just tested it, but I'm not OK with that 2-resistor chain when there was room for 4 with a little HV jelly.http://www.amazon.com/Andoer-UNI-T-Waterproof-Voltage-Testers/dp/B00NFAWRZS
HP 8648C Question - Page 1
Forum section: electronics / testgear

author: MotoDog
author_rank: Contributor
timestamp: January 17, 2016, 10:06:23 pm
content: I got myself a Christmas present on eBay. An HP 8648C RF Signal Generator.When I put my Rigol DSA 815 spectrum analyzer on the 10 Mhz reference on the back (BNC) with a 20 dB atten. , I get-7 db signal at 10.033333 Mhz. Not 10 Mhz exactly?Anyone know or got a manual?ThanksMike

author: KJDS
author_rank: Super Contributor
timestamp: January 17, 2016, 10:55:56 pm
content: What makes you think that the 10MHz ref is wrong and not the Rigol?What does the Rigol think of what comes out the front? at 10MHz and also at higher frequencies?

author: MotoDog
author_rank: Contributor
timestamp: January 18, 2016, 11:02:12 pm
content: Well, I have a 50 Mhz Oscillator (the can type on 5V) on a breadboard. The SA marker is reading 50.001666?I am trying to make sure the HP RF Generator is OK. It was advertised as in good working condition. It seems to work fine,and then sometimes intermittent or I am having cockpit problems. The 10 MHz out the back I found off 10 MHz?It may not matter? I think things are probably OK. I will get a freq. counter some day or maybe try comparing to WWV ona receiver.I sure like having the SA and the Generator! I have been playing with transmitting and receiving with Arduino and 433 MHZ Modules.Mike, WA6ISPCrestline, Ca.

author: TheSteve
author_rank: Unknown
timestamp: January 18, 2016, 11:18:51 pm
content: I'd expect the Rigol to be closer then that and would suspect the 10 MHz reference. Without a true known reference though you will never know.

author: G0HZU
author_rank: Super Contributor
timestamp: January 18, 2016, 11:38:57 pm
content: What span are you using on the Rigol when measuring frequency?xx.001666MHz and xx.033333MHz suggest that you are using a very wide span because these look to be bin size limitations (i.e. they look like neat fractions) rather than accurate measurements of frequency.Try zooming down in span size or better still use a frequency counter to measure the sig gen reference.The 10MHz reference in the HP sig gen is probably just HP's standard low cost 10MHz reference but it is unlikely to be more than 20ppm off frequency even if it hasn't been adjusted in many years so this would be a 200Hz error at 10MHz.

author: MotoDog
author_rank: Contributor
timestamp: January 23, 2016, 06:07:00 pm
content: Yes, I have wondered about the odd freq shown. I do see difference when I push AUTO, and let the SA do the setup.I also just got a DS1054Z scope. It has a frequency counter function. It matches the HP 8648. It seems to stay the sameno matter what the horiz. sweep is set for. Might be a real frequency counter?So, I think you are correct, it depends on the span on the SA.ThanksMike, WA6ISP
Teardown: DB Products / Ducommun 6SS2M11 RF coaxial switch - Page 1
Forum section: electronics / testgear

author: Earendil
author_rank: Regular Contributor
timestamp: January 22, 2016, 10:43:27 pm
content: One of these RF switches failed in my NoiseCom noise source instrument. Since I managed to find a replacement on Ebay I though a tear down might be interesting. I believe these switches could be repaired if someone is really desperate. In my case probably I could have fixed it just by replacing one of the diodes. However since the replacement was rather cheap I didn't bother.

author: TheSteve
author_rank: Unknown
timestamp: January 22, 2016, 11:22:46 pm
content: Great pics, thanks for the teardown.

author: crispy_tofu
author_rank: Super Contributor
timestamp: January 23, 2016, 01:12:24 am
content: Very nice!
Megger AVO310 (Made by Appa) teardown - Page 1
Forum section: electronics / testgear

author: bigsky
author_rank: Regular Contributor
timestamp: January 20, 2016, 04:57:30 pm
content: No-one commented on my last teardown, of a Humax PVR:https://www.eevblog.com/forum/reviews/humax-pvr-9300t-teardown-pics/So before I waste my time again, would people like to see some internal pics of a Megger AVO310 DMM?http://uk.megger.com/products/electricians-testers/multimeters-and-clampmeters/digital-multimeter-avo300-and-avo310/It's actually made by Appa. It's quite interesting, but then again I thought the Humax was interesting...

author: zaoka
author_rank: Frequent Contributor
timestamp: January 21, 2016, 03:44:53 pm
content: Sure!!!

author: bigsky
author_rank: Regular Contributor
timestamp: January 21, 2016, 09:29:00 pm
content: Hurray, one response! Watch this space...

author: lem_ix
author_rank: Regular Contributor
timestamp: January 21, 2016, 09:52:19 pm
content: I'm no expert but I can take a lookAppa sold as Benning around here for quite a hefty sum, they better impress.

author: PedroDaGr8
author_rank: Super Contributor
timestamp: January 22, 2016, 02:26:42 pm
content: The PVR is a bit outside of the realm of this forum, that's all. This is much more in the realm, look forward to seeing the build quality of this Appa.
LeCroy scope calibration - Page 1
Forum section: electronics / testgear

author: LeoUCDavis
author_rank: Contributor
timestamp: January 20, 2016, 04:42:47 pm
content: Hi allI have a WavePro 7300A that is out of spec. How much does it usually cost to send it back to LeCroy for a calibration?Thanks

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: January 22, 2016, 06:43:32 am
content: Quote from: LeoUCDavis on January 20, 2016, 04:42:47 pmHard to say, as we don't even know where you're located (you can set your country in your forum profile).But...Can you describe What exactly you mean with the scope being "out of spec"? Because 'calibration' doesn't mean 'adjustment'. All calibration does is to compare a DSO against a set of known standards to confirm it's within specs. DSOs like the WP7300A don't just go out of spec like their analog counterparts from the old days, there's very little to align in these scopes (and what is has been aligned during factory calibration after production) and if a scope like this goes out of spec that usually means there is a hardware fault which needs repair.The WavePro 7300A is still fully supported and can be repaired by LeCroy. Call them and ask for a quote. This quote will usually be a a lump sum which covers any kind of defect, but if the repair ends up being cheaper then you only pay the lower price for what the repair actually costs. If the repair ends up being very expensive (i.e. having to replace the ADC hybrid modules) then you still only pay for the (lower) quoted lump sum.

author: LeoUCDavis
author_rank: Contributor
timestamp: January 22, 2016, 08:32:08 am
content: True true. I just updated my location.Thanks for the all the info. The particular 7300A unit has its bandwidth calibration values out of spec. I will look into contacting LeCroy directly.
removing a 475 from a rack mount? - Page 1
Forum section: electronics / testgear

author: ledtester
author_rank: Super Contributor
timestamp: January 21, 2016, 05:04:16 pm
content: Hi,I have a Tektronics 475 in a rack mount like this one:http://albederpccenter.com/wp-content/uploads/2014/04/Tektronix-485-Dual-Trace-Portable-Oscilloscope-with-Rack-mount-shelving.jpg(also attached as an image)I can't figure out how to remove it from the rack mount. Is it time to get the hack saw out?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 21, 2016, 05:30:33 pm
content: Are there screws at the back to loosen and slide the inner chassis out from the enclosure?If it's made so that the entire rack chassis is the enclosure, then it seems you'll have to locate a replacement enclosure (assuming there aren't other changes to the inner chassis part, e.g. rear panel stuff?), or yes hacksaw the extraneous enclosure bits away.Tim
Camscope ICSL-305 - Page 1
Forum section: electronics / testgear

author: Srbel
author_rank: Frequent Contributor
timestamp: December 11, 2015, 09:31:20 am
content: I've seen how it performs, and wanted to buy one second hand. But it is as if it does not exist???This is how it looks like:

author: Srbel
author_rank: Frequent Contributor
timestamp: December 12, 2015, 09:24:28 am
content: Oh, I forgot to say. It is an inspection microscope camera (for inspecting PCBs).

author: Srbel
author_rank: Frequent Contributor
timestamp: January 21, 2016, 06:39:53 am
content: No? :/
Teardown, Repair & Calibration of a Fluke PM6680B 225MHz Frequency Counter - Page 1
Forum section: electronics / testgear

author: Hugoneus
author_rank: Frequent Contributor
timestamp: January 20, 2016, 02:49:37 pm
content: You can watch the video here: [46 Minutes]youtu.be/JiO3OoMfwXQMore videos at The Signal Path:http://www.TheSignalPath.com

author: bktemp
author_rank: Super Contributor
timestamp: January 20, 2016, 03:23:22 pm
content: Great video as always.The 431 voltage reference would have been the last part I would habe checked. Quite unusual to see one fail.If you still have the part, could you compare its behaviour to a new part? It could be interesting to see how it is different. Since the power supply was still in regulation, the 431 was not complete dead.At the end of the video you made a mistake: You can not calculate the power consumption by only measuring the current, because all the filter caps in the power supply create a large reactive power.

author: Hugoneus
author_rank: Frequent Contributor
timestamp: January 20, 2016, 03:33:12 pm
content: Quote from: bktemp on January 20, 2016, 03:23:22 pmThanks, I recognize that the current consumption is not all due to the resistive element. However, I did measure the 5V DC supply, and it is about 3.5W and some more from the other two supplies.

author: Hugoneus
author_rank: Frequent Contributor
timestamp: January 21, 2016, 01:51:35 am
content: By the way, if anyone is interested to buy this unit, let me know.
Rigol DP832A Rev 2.1 Help. - Page 1
Forum section: electronics / testgear

author: AlanR
author_rank: Regular Contributor
timestamp: January 20, 2016, 05:37:53 am
content: I somehow blew out channel one's fuse and pass mosfet when I accidentally shorted a brushed DC motor's wires together that was connected to the power supply. The other 0-30 volt channel worked and the 5 volt channel still worked, but now after I did the repair to channel one I get this error: "Analog Board self-test Fails!". Channel one now works again, but channel two and the 5 volt channel no longer work. Does it need calibration or something?DOH!!!!!!!!!!!!!!!! I found that I forgot to connect a header pin that sits on the side of the frame chassis of the power supply.It now works again without error.

author: _Wim_
author_rank: Super Contributor
timestamp: January 20, 2016, 07:06:40 pm
content: Been there, done that. Good to hear it works again!
Voltage controlled PSU for simulating noise in power systems? - Page 1
Forum section: electronics / testgear

author: rx8pilot
author_rank: Super Contributor
timestamp: January 20, 2016, 11:14:55 pm
content: I hope the title is not too strange. The hope is to find a power supply that I can inject various noise and spikes into a load based on a waveform from an ARB. The end use of this is to simulate various power rail problems and test circuits that are intended to deal with them.In some cases it would be used to add low-voltage ripple on top of 10-20VDC / 10-15 Amps. In some cases it would be used to simulate inductive spikes as high as 100Vor so. It's not unlike an audio amplifier, but hopefully higher bandwidth and some programmable limits. I have not thought through the high-end of the bandwidth yet, but I suspect that it would be hundreds of Khz or so.Google searches did not turn up anything, but the quality of my search input is probably not so good either. Is this an off-the-shelf device? .Thank you in advance to anyone willing to help. If you have some other method of simulating bad power, that would be just as helpful.

author: Dave
author_rank: Super Contributor
timestamp: January 21, 2016, 02:02:14 am
content: What you're looking for is aline injector.Basically it's a transformer in series with the power supply and you then feed the AC signal into the other coil. That way you get an AC signal superimposed onto the DC from the power supply.
DS1054Z front end switching noise? - Page 1
Forum section: electronics / testgear

author: ice595
author_rank: Regular Contributor
timestamp: January 15, 2016, 11:11:33 pm
content: So, I've got my Rigol DS1054Z a couple of days ago and hacked it to 100MHz.As I was playing around with it, I discovered that the front end on all 4 channels seems to pick up a bit of noise.I've disconnected all the probes and set coupling to GND and set 20MHz BW limit off.it seems like channel 2 is "less" noisy that the others.does anyone have this problem?

author: TheSteve
author_rank: Unknown
timestamp: January 15, 2016, 11:29:11 pm
content: Its normal. The Rigol DS1054Z isn't perfect, but it was cheap...

author: gmb42
author_rank: Frequent Contributor
timestamp: January 16, 2016, 12:36:53 am
content: Seehttp://www.eevblog.com/2014/04/10/eevblog-601-why-digital-oscilloscopes-appear-noisy/andhttps://www.eevblog.com/forum/testgear/mso1074z-s-14-months-after-purchase/for more information.

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 20, 2016, 02:10:15 pm
content: my ds1054z arrived today... fresh unmodded 50MHz with limitation...1st pic: before cal2nd pic: after calsame setting as OP... (except 2nd pic i forgot to reset to 1X)
Opinion Siglent SDG830 vs Siglent SDG1020 ? - Page 1
Forum section: electronics / testgear

author: dexters_lab
author_rank: Unknown
timestamp: September 20, 2015, 09:31:43 am
content: they seem to be exactly the same price at the moment and i am looking to buyi am hedging towards the 1020, having two ch output and the extra 10mhz on the 830 is not so important to mei have read the 1000/800 series thread on here but i am still torn a bit between themcan anyone offer some comments?i am probably more concerned about firmware bugs, DDS jitter, glitches etc and how they compare to each other rather than the on paper spec

author: nctnico
author_rank: Super Contributor
timestamp: September 20, 2015, 10:36:53 am
content: It depends on what you want. 2 channels is handy although the 2nd channel on the SDG1000 series has a limited amplitudeOTOH 30MHz bandwidth could come in handy as well.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: January 20, 2016, 10:58:08 am
content: HiI am interested in the outcome of this as I'm thinking about exactly the same choice.Which did you buy? Are you happy?

author: dexters_lab
author_rank: Unknown
timestamp: January 20, 2016, 11:12:12 am
content: went with the SDG1020 in the endtotally happy with it
updating 1074z? (I'm on 00.02.03.SP5 with hacks) - Page 1
Forum section: electronics / testgear

author: daemonix
author_rank: Contributor
timestamp: January 18, 2016, 04:24:25 pm
content: hi everyone,I need a bit of up to date help!I haven't look around for new info for quite some time!!!Im still on 00.02.03.SP5 on my DS1074Z. With all the hacks (NOT the 500us something). 100mhz etc.1)Which firmware I can load without messing with the hacks etc??2)Where should I get it from? UK telocin for example?thanks a lot!

author: daemonix
author_rank: Contributor
timestamp: January 19, 2016, 01:38:37 pm
content: Should I install this over the hacks? Will this be ok?DS/MSO1000Z/-S: 00.04.03.02.03 (shown as 00.04.03SP2 on the instrument) {June 16, 2015}Thanks

author: daemonix
author_rank: Contributor
timestamp: January 19, 2016, 11:34:56 pm
content: Iv got these two firmware:DS1000Z 00.04.03.01.05DS1000Z 00.04.03.02.03Is the first one the SP1 you are talking?
Uni-T UT-61E vastly disparate pricing - Page 1
Forum section: electronics / testgear

author: MrSlack
author_rank: Frequent Contributor
timestamp: January 19, 2016, 09:59:12 pm
content: I've decided to grab a new meter. I've got two UT33A's and a very old and limping Fluke 76 which is circling the drain (several not very careful previous owners I will add)Uni-T's UT-61E does the job by the looks. For sub 100v work only with semi-useful capacitance meter functionality even if it's only ball park (saves me having to piss around with a hacked up capacitance bridge). Problem is there is rather disparate pricing here in the UK.On eBay I can get one shipped from the UK for ~£38 inc taxOn Rapid they are ~ £95 inc taxOn Farnell, the Tenma rip off version is £71 inc taxNow that's suspicious. Does anyone know if there different regional versions of this meter or different revisions?

author: crispy_tofu
author_rank: Super Contributor
timestamp: January 19, 2016, 10:09:10 pm
content: AFAIK, there are two versions of the meter: the 'European GS' version (better input protection, CAT ratings are actually legit) and the other version (cheaper).GS version (CAT III 300V rated):

author: MrSlack
author_rank: Frequent Contributor
timestamp: January 19, 2016, 10:14:16 pm
content: Thanks - that's what I suspected.Not too worried about the input protection TBH as I keep the Fluke around for high energy stuff.
Power Supply 20mhz oscillations - Page 1
Forum section: electronics / testgear

author: rmkluzak
author_rank: Newbie
timestamp: January 17, 2016, 03:55:33 am
content: Hello,I'm testing a device, and expect to see a 20mhz squarewave from one of the output pins on the device's board.Instead, I'm seeing a sinusoidal-like wave.I put another scope probe near the power supply leads,and I see a 20mhz waveform that is in phase with theerroneous waveform on the device.I'm a lowly software engineer--can anyone explainwhat may be happening?Thanks,Ryan

author: w2aew
author_rank: Super Contributor
timestamp: January 17, 2016, 04:48:13 am
content: Quote from: rmkluzak on January 17, 2016, 03:55:33 amCould be several things. What is the bandwidth of the scope? What type of probe are you using? What's its input capacitance? What is the source impedance of the node you're testing?

author: rmkluzak
author_rank: Newbie
timestamp: January 19, 2016, 01:19:59 am
content: I think I have the answer --1)My scope only has a 100 mhz bandwidth, so the wave will not be as square as I thought.2)My scope probe was set to 1x. By changing to 10x, the waveform becomes squarer.Thanks,Ryan

author: TimFox
author_rank: Super Contributor
timestamp: January 19, 2016, 04:57:31 pm
content: The difference between "mhz" and "MHz" is substantial. Both "m" and "M" have recognized meanings and must not be confused.

author: kfitch42
author_rank: Frequent Contributor
timestamp: January 19, 2016, 05:14:54 pm
content: Just, FYI, this might be a good video to watch:http://www.eevblog.com/2013/04/13/eevblog-453-mysteries-of-x1-oscilloscope-probes-revealed/
Vintage Tech: Introduction to the Fluke 881A Differential Voltmeter (1965) - Page 1
Forum section: electronics / testgear

author: w2aew
author_rank: Super Contributor
timestamp: January 17, 2016, 10:52:17 pm
content: Here's a short video on the basics of the Fluke Model 881A Differential Voltmeter circa 1965. This unit hasn't been in use in >20 years, and is still works surprising well.

author: TheSteve
author_rank: Unknown
timestamp: January 17, 2016, 11:02:22 pm
content: Great video. If you decide to recap please do a quick video on that while showing us the mechanical side of the unit.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: January 17, 2016, 11:15:56 pm
content: Yes, if you do recap please video it.

author: LINACboy
author_rank: Contributor
timestamp: January 18, 2016, 08:55:50 am
content: Thanks for another great video!The front panel of your device reads model 881AB. So does your unit have the built-in battery pack, too? If so, are the cells in your unit still in working condition?I was wondering, because I have a similar instrument gathering dust on the shelf, an HP 3420B, with lots of leaky NiCd-cells. And haven't decided what to do with it, yet:A. Simply replace the NiCads with new ones - which are eiter rather expensive or unobtainable here in Europe these days.or B. Migrate to NiMH and go through the trouble of having to modify the charging circuit.

author: w2aew
author_rank: Super Contributor
timestamp: January 18, 2016, 02:53:44 pm
content: Quote from: LINACboy on January 18, 2016, 08:55:50 amYes, it is the AB model with internal batteries, which are long dead. I'll likely remove them, and not replace them, since I don't intend to operate this from the batteries.
Anyone know how to contact the creator of PIoscillo - Page 1
Forum section: electronics / testgear

author: Carrington
author_rank: Super Contributor
timestamp: January 17, 2016, 07:02:25 pm
content: As the title says:Anyone know how to contact the creator ofPIoscillo?Website:http://pioscillo.com/It looks like an abandoned project.Other similar tools:-Benchvue(For Keysight products only)-VISA TM Data Capture(For Keysight products only):http://koti.kapsi.fi/jahonen/Electronics/VISA_TM_DC/VISA%20TM%20Data%20Capture.zip-VISA COM(For Keysight products only):http://blog.solutions-cubed.com/visa-com-example-with-oscilloscope/#comment-135810-ASA M1 Oscilloscope Tools:http://www.amherst-systems.com/m1-waveform-viewer/articles/waveform-viewer/m1-waveform-viewerThanks in advance.Cheers,Carrington.

author: Supercharged
author_rank: Regular Contributor
timestamp: January 17, 2016, 07:14:57 pm
content: The domain of this site was registered byRegistrant Name: Fabrice TronchetRegistrant Organization:Registrant Street: 10 rue sous les VignesRegistrant City: Lavans les DoleRegistrant State/Province:Registrant Postal Code: 39700Registrant Country: FRRegistrant Phone: 33.951906487Registrant Phone Ext:Registrant Fax:Registrant Fax Ext:Registrant Email: system@hlsorg.infosource:http://www1.domain.com/whois/whois.bmlI can't say if this is correct or if it helps you but this is what i found

author: Carrington
author_rank: Super Contributor
timestamp: January 17, 2016, 07:44:20 pm
content: Quote from: Supercharged on January 17, 2016, 07:14:57 pmThank you very much!I will try to contact him through this email.Cheers.
GW Instek SFG-2004 function generator - review & teardown - Page 1
Forum section: electronics / testgear

author: tom66
author_rank: Super Contributor
timestamp: January 17, 2016, 12:55:43 am
content: In this video I demonstrate the functionality and performance of my new GW Instek SFG-2004 synthesised DDS function generator, including some basic performance analysis. I also take the cover off and poke around inside.This is my first electronics test equipment review video. I'd appreciate any comments on the editing, content, and style.

author: TechItApart
author_rank: Contributor
timestamp: January 17, 2016, 07:43:10 am
content: Good video, I especially liked the little round-up at the end. Too many reviewers just cut the video after the teardown and expect you to make your own conclusions, but really I want to hear what you think.Only issue is the slight crackle on the mic, but I'm sure you're aware of that.Cheers

author: TechItApart
author_rank: Contributor
timestamp: January 17, 2016, 12:06:57 pm
content: Actually on second thoughts there might not be a crackle on the mic... I think my headphones are dying! Just watching one of Dave's vids and get the same thing lol

author: tom66
author_rank: Super Contributor
timestamp: January 18, 2016, 01:06:03 pm
content: There's some crackling at the end of the video as I used my phone to film that bit (easier for handheld shots.)In my next teardown video I'm going to experiment with some better lighting and macro capabilities. I only have a prosumer point-n-shoot camera (Casio EX-ZR1000) for this work. The autofocus is really dodgy but it does have a limited set of manual focus options.
When to use Rigol 50 Ohm thru feed oscilloscope adaptor DS1054Z - Page 1
Forum section: electronics / testgear

author: Ecklar
author_rank: Regular Contributor
timestamp: July 01, 2015, 10:49:40 pm
content: Under what situations would I need or use the Rigol 50 Ohm thru feed adaptor on the DS1054Z ? Is there a particular frequency point above which I would need it and below which I would not? I saw the excellent YouTube that showed without an impedance match (low going into scope high) you might get reflections, but, I didn't understand is there a frequency threshold or some other issue.Thanks

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 17, 2016, 04:26:22 pm
content: i'm surprised this went unanswered after 6 months, maybe wrong section....i hope the OP is already know the answer, anyway without acting like a guru and repeating the fact again... fwiw some of it...https://www.avtechpulse.com/appnote/techbrief12/https://en.wikipedia.org/wiki/Electrical_termination
measure capacitance and resistance - Page 1
Forum section: electronics / testgear

author: pini200
author_rank: Newbie
timestamp: January 13, 2016, 02:31:49 pm
content: helloi search device that Automatically measure capacitance and resistancewithout Selector modes,and output data in RS232 .

author: billfernandez
author_rank: Regular Contributor
timestamp: January 14, 2016, 04:09:47 am
content: Perhaps the Extech 380193?http://www.extech.com/instruments/product.asp?catid=56&prodid=349

author: pini200
author_rank: Newbie
timestamp: January 14, 2016, 07:59:52 am
content: I am looking in the direction of Keysight U2741Ahttp://www.keysight.com/en/pd-1420686-pn-U2741A/usb-modular-digital-multimeter-5-digit?nid=-34319.787340&cc=IL&lc=engbut he is too expensivei need one that can send command and get measurment (like R,C)

author: tautech
author_rank: Super Contributor
timestamp: January 14, 2016, 08:22:00 am
content: No RS232 but you can trust these:http://www.advancedevices.com/

author: pini200
author_rank: Newbie
timestamp: January 15, 2016, 09:17:39 am
content: i need rs232 or usb connection

author: Muttley Snickers
author_rank: Unknown
timestamp: January 15, 2016, 10:19:28 am
content: The DER DE 5000 LCR meter can readily measure what you have asked for when in the auto mode, however should you need to use the sort feature then you first need to select the particular mode either L, C or R and set the tolerances.The unit can be ordered with the USB cable and obviously the software, I don't have the USB interface although I did download the software and others have looked at the serial decoding which I think from memory is done.There are dozens of threads on both this and other LCR meters on the forum.

author: MrSlack
author_rank: Frequent Contributor
timestamp: January 15, 2016, 11:27:24 am
content: These are never cheap.My first choice would be:http://www.tti-test.com/products-tti/text-pages/prec-lcr400.htm

author: HighVoltage
author_rank: Super Contributor
timestamp: January 15, 2016, 11:38:09 am
content: Take a look at the older Philips / Fluke PM6304 and PM6306 automatic LCR meters.They have an optional RS232 or GPIB connector and you can easily grab the data, like R and CThey have reasonable prices from time to time on ebay.

author: pini200
author_rank: Newbie
timestamp: January 17, 2016, 06:17:31 am
content: the device should be small with Dimensions like in the pictureand without LCDThank
Rigol DS1052e weird problem with buttons - Page 1
Forum section: electronics / testgear

author: fubar.gr
author_rank: Unknown
timestamp: January 15, 2016, 02:51:00 pm
content: I have a Rigol DS1052e with the latest 100MHz firmware mod.Whenever I press one of the buttons, there's a quick succession of beeps (I have keypress sound enabled) and the corresponding menu comes and goes on the screen really quickly. It is as if I'm pressing the key many times really fast.This is very annoying because I have to press a key several times until the menu comes and stays on the screen.Has anybody encountered this problem?

author: tooki
author_rank: Super Contributor
timestamp: January 15, 2016, 04:11:59 pm
content: Sounds like a dirty or failed button contact. Take it apart and clean the PCB contacts as well as the ones in the rubber domes, using alcohol.

author: fubar.gr
author_rank: Unknown
timestamp: January 16, 2016, 11:31:03 am
content: It does this on pretty much every button, so I suppose it's something software related.
Agilent U8001A encoder - Page 1
Forum section: electronics / testgear

author: radar_macgyver
author_rank: Frequent Contributor
timestamp: January 16, 2016, 06:12:41 am
content: Hello all,Not sure of forum rules - so I figure I'd post this and mods can move/delete if it's not the right place.I have an Agilent U8001A power supply, which has a broken control knob. It allows me to decrement a parameter (voltage/current) but increment is very jumpy. I opened it up and probed the quadrature encoder outputs. Sure enough, one of them was noisy (transitions were not clean). I managed to get the part off the board, but there was little to identify it. After some searching on Digikey, I found the part: it's a Bourns PEC16-4015F-N0024. I'm going to replace it with a PEC16-4215F-N0024, which is the same thing but with detents (I dislike encoders without detents). Wow, can't believe Agilent used such a cheapie encoder on this supply!Hope this helps someone else who has similar issues.

author: HighVoltage
author_rank: Super Contributor
timestamp: January 16, 2016, 09:41:40 am
content: Thanks for this part number.Encoders have been a problem in Agilent gear for a long time in power supplies and signal generators and, well almost anything.Sometimes you just open them and clean them and they will work perfectly again.But most of the time, I have replaced them as you have.I think one of the reasons they break is during shipping of a used unit and it gets hit a little on a turning knob.Because I bought several Agilent instruments used and the seller claimed that the knob was working perfectly before shipping.But it is always an easy fix.
Instek GDS-1022 firmware version 1.26 - Page 1
Forum section: electronics / testgear

author: Hogwild
author_rank: Regular Contributor
timestamp: January 16, 2016, 07:26:05 pm
content: Hi everyone:Huge electonics newbie here. However, I am very knowledgeable about computers.I noticed that there may be some bugs in the firmware of the Instek GDS-1022 oscilloscope I bought recently.The scope currently has firmware version 1.24. I downloaded 1.26, but I'm reluctant to upgrade to firmware 1.26 unless I know that that 1.26 is reasonably reliable/stable.-I can't see any way to downgrade firmware versions if something goes wrong-This scope is likely not in warranty-There is no changelog at all (come on, Instek-lazy lazy) so I don't know what might get fixed or notSo far, all I found when searching the Web was this post, originally in Polish:=============="GW Instek GDS-1022 - Exclusion of educational mode. Hello. I have the oscilloscope GW Instek GDS-1022. I did not work because AutoSet feature is turned on educational mode. I did update the firmware to version 1.26. And now I do not work for me AutoSet, cursors and automatic measurements. When I press on one of the buttons appears: Education mode is enabled!"==============Can anyone else comment on whether they are doing okay with firmware 1.26 on this scope?

author: Loboscope
author_rank: Regular Contributor
timestamp: January 16, 2016, 10:18:00 pm
content: I own this scope and I have updated to Ver. 1.26 and I can confirm that the scope works fine, stable and without any problem - anyhow I did not notice any problem with this Version.On my scope the educational mode has never been activated and therefore I don´t have to use it, I will never activate this mode (but I also would not know how to do this).Greetings, Jürgen