hybridfree/eevblog-posts huggingface dataset:
Zurich Instruments? - Page 1
Forum section: electronics / testgear

author: fonograph
author_rank: Frequent Contributor
timestamp: October 28, 2017, 09:54:26 pm
content: Is this a good brand? I have never seen this T&M manufacturer ever mentioned,either on forums or youtube,seems like they mostly make something very unusual,lock in amplifiers.They also make what seems like very high performance USB lcr meter that goes to 1 terra ohm and 5 MHz.did anyone have a chance to work with this beauty?they also make some Lab One software since all their instruments are usb,so no screen everything controled through computer,its kind of like BenchVue I think.Did anybody use it? How is it?

author: ebclr
author_rank: Super Contributor
timestamp: October 29, 2017, 02:47:30 am
content: Swiss people generally do perfect and expensive things, If you can afford go blind

author: Vgkid
author_rank: Super Contributor
timestamp: October 29, 2017, 03:06:23 am
content: Their product list reminds me of srs , yet the design reminds me of NI. I don't like the brochure of the impedance analyzer.

author: JonM
author_rank: Unknown
timestamp: October 29, 2017, 05:04:58 am
content: Zurich Instruments a regular advertiser in Physics Today magazine (as is SRS). Having spent a lot of time in Zurich, and being a fan-boy of Swiss hardware, I study their advertising. I think that the Impedance Analyzer is new. They most often feature their Lock-in Amplifiers.

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 29, 2017, 05:27:03 pm
content: https://www.youtube.com/channel/UC6ORintRBnS84kXQRR-YGVw/videosThey have a youtube channel.
DTM0660 based DMMs tweaks and mods |  UT139C UT210E  ZT101 AN8008 etc - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: October 29, 2017, 02:49:38 pm
content: Few custom firmwares and hardmods for DTM0660 based DMMs (+calibration and RS-232 activation)see russian forumhttp://kazus.ru/forums/showthread.php?t=112135
Agilent DSO-X 2024A Softkey problem - Page 1
Forum section: electronics / testgear

author: g0hjq
author_rank: Unknown
timestamp: October 28, 2017, 06:05:48 pm
content: Has anyone on here had any problems with the soft keys underneath the screen on an Agilent DSO-X 2000 series oscilloscope?The main oscilloscope and all the main buttons and dials appear to work fine, but for some reason, the soft-keys don't appear to do anything, which makes it very difficult to use.Rebooting makes no difference. Normally I would try a factory reset, but ... guess what ... you need to press a soft-key to activate it.I bought the scope for about 18 months ago from Aspen Electronics. I think they are an official UK distributor, so it's probably still under warranty, but I want to check I'm not doing something silly before returning it.Looking at the service manual, it says that the official policy is not to repair models of 200MHz and below. If they replace it, how easy is it to transfer all the software options to the new scope?Thanks.Gary.

author: TK
author_rank: Super Contributor
timestamp: October 28, 2017, 07:26:25 pm
content: If Keysight replaces the instrument, they will program the same serial number and activate all the options before shipping it to the customer
2014 LabView Drivers for Siglent SDS2304X - Page 1
Forum section: electronics / testgear

author: MikeLogix
author_rank: Contributor
timestamp: October 23, 2017, 07:58:21 pm
content: Has anyone converted the Siglent SDS2304X LabView drivers from 2015-16 to 2014? I looked at the NI website and there is only the latest versions which don't work on my version of LabView.Thanks

author: tautech
author_rank: Super Contributor
timestamp: October 23, 2017, 08:05:06 pm
content: So does the one on the Siglent page not work ?http://siglentamerica.com/gjjrj-xq.aspx?id=2601&tid=204Contact the guys in Ohio and let them know if there's a problem with drivers.info@siglent.com

author: MikeLogix
author_rank: Contributor
timestamp: October 23, 2017, 08:14:37 pm
content: Yes I tried those drivers. I get the following error screen:It appears that the Siglent drivers are written for a newer version of LabView than what I have (2014).Thanks

author: tautech
author_rank: Super Contributor
timestamp: October 23, 2017, 08:20:21 pm
content: Quote from: MikeLogix on October 23, 2017, 08:14:37 pmOK, thanks for confirmation.I'll send a heads up to the US GM to see if we can get some compatible drivers for older versions of Labview.

author: Unknown
author_rank: Unknown
timestamp: October 24, 2017, 04:49:19 pm
content: Yes. Many of the LabVIEW drivers posted on NI.com were built using Labview 2015-16. I will check with Engineering to see if we can get them saved for 2014 and posted.Can you write me at jason.chonko@siglent.com and I will respond directly to your email?Thanks,Jason (Siglent America)

author: MikeLogix
author_rank: Contributor
timestamp: October 28, 2017, 10:46:47 pm
content: Now that is customer service. Thanks Jason for sending me the drivers. They seemed to have workedSee Photo.One question though. Normally I load drivers by using the tools panel > Find Drivers which loads drivers from the NI site. This time, I deleted the loaded Siglent Drivers (the 2015 Version) from the Instr.lib folder and copied the folder you sent me in the same folder. Only thing now is the functions for the scope do not show up in my Function pallet. So I must have missed a step somewhere? Any thoughts on what I need to do?Thanks

author: MikeLogix
author_rank: Contributor
timestamp: October 29, 2017, 02:15:46 am
content: Here is what I don't get. The instrument drivers do not show in the function palette, but they do show in the instrument driver finder. See screenshots.Im a newbie to labview so still learning the software
oscilloscope pm3260-e or hitachi v-212 (beginner scope) - Page 1
Forum section: electronics / testgear

author: ariek
author_rank: Newbie
timestamp: October 23, 2017, 06:59:18 pm
content: I am a newb and looking for a oscilloscopeWhile checking out Dave's video on an oscilloscope under $50 I locally found two1) Hitachi V-2122) A philips pm3260-eBoth are in great condition with probes and all. But I know to little to make a good choice.specs (as found on ebay)philipsFrequency range: 10 Hz-120 Mhz, rise time 3 ns;2 channel, C.R.T 80x100 mm P31 phosphor, acceleration voltage 20 kV;Y-axis deflection factor: 5 mV/DIV - 2 V/DIV;X-axis 1 s/DIV - 50 ns/DIVI think the specs of the V-212 are already knownCan you help me out with advice

author: David Hess
author_rank: Super Contributor
timestamp: October 24, 2017, 04:19:31 am
content: Things I would consider:1. The PM3260 has a much higher CRT acceleration voltage to support its higher bandwidth which will make its CRT brighter and sharper. (20kV versus 2kV)2. Which one has the most or at least complete service documentation?3. How common are each model? This has an impact on any spare parts which might be needed.4. The PM3260 had a dual delayed timebase so it is more complex to maintain.

author: ariek
author_rank: Newbie
timestamp: October 28, 2017, 09:23:25 am
content: Hi DavidThanks for your response. I just bought both and testing them both at this moment.They are in great condition and all the documentation is supplied

author: oldway
author_rank: Super Contributor
timestamp: October 28, 2017, 10:01:25 am
content: Philips oscilloscopes typically used reed relays in the input attenuators, which never gave problems of bad contact.On the other hand, the PM326x series does not use reed relays and has huge problems of bad contacts in the input attenuators.In addition, at least the PM3264 (4 channels) has a lot of problems with high voltage (leaks, corona effect) because the high voltage is very high.
Clamp meter choices - amprobe/brymen? - Page 1
Forum section: electronics / testgear

author: monkey_magic
author_rank: Contributor
timestamp: October 29, 2017, 12:48:21 pm
content: I'm looking to buy a reasonably priced DC/AC clamp meter, primarily for general electrical use but it would be nice for it to read low DC amps for fault-finding automotive/electronics.I understand I would probably be better served with two separate meters but I hope to find a compromise in one.I've had Brymen DMMs before and very happy with them so I have been considering their 079 (Amprobe 320) and 089 (Amprobe 330) clamps but can't find many opinions on them. The motor rotation feature is not essential but could be quite handy along with the VFD.It seems the 089 has a better backlight and current rating and potentially deals with VFD better – but the larger clamp looks like it could be a hindrance.Does anybody have any opinions on these meters or recommendations for similar alternatives I should look at?I quite like the look of the Hioki 4371, but they seem more expensive and difficult to get in the UK.Thanks!

author: SkyMaster
author_rank: Frequent Contributor
timestamp: October 29, 2017, 02:32:33 pm
content: Quote from: monkey_magic on October 29, 2017, 12:48:21 pmWelcome to the forum, monkey_magicThe Uni-T UT210E has a one DC mA resolution and is reasonably priced.https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/

author: monkey_magic
author_rank: Contributor
timestamp: October 29, 2017, 04:20:01 pm
content: Thank you SkyMaster,I did check out the Uni-T and it would make a nice electronics meter but I really want something with a good CAT III/IV rating for mains use.

author: BNElecEng
author_rank: Regular Contributor
timestamp: October 29, 2017, 04:38:05 pm
content: Have you looked at Metrel current clamps? I use one which has builtin power measurement functionality, including harmonics and is also sensitive enough for earth leakage measurements. Cost is about £300 for a new one.

author: monkey_magic
author_rank: Contributor
timestamp: October 29, 2017, 06:09:54 pm
content: I hadn't looked at Metrel, but interestingly they also appear to be rebadging Brymen meters. Which Metral did you have?I suppose it does give a few options for finding the best deal.Metrel MD 9221Amprobe AMP-320Brymen 079

author: BNElecEng
author_rank: Regular Contributor
timestamp: October 29, 2017, 06:30:57 pm
content: Had to go find the model number. It's a Metrel MD9272. Very handy little meter.I didn't know that about them rebadging brymen meters. I'll keep that in mind, thanks.
Protek DSO Model 840 - Page 1
Forum section: electronics / testgear

author: altfiddle
author_rank: Newbie
timestamp: March 20, 2017, 03:08:04 am
content: Hi there,I just purchased this dso today for what I hope was a great deal. It turns on and all the buttons work, inputs/probes work, display and backlight work... and battery seems to be ok... seller said he charged it using the USB port since he had no adapter.However, I did some searching to learn more about it and couldn't find anything other than a datasheet which only lists features and refers to an older Protektest.com site which is no longer. I did find archived pages from that site on archive.org, but the download links are not archived so I can't get the software or manual. And the current Protek website doesn't even have it on there.Datasheet link:http://www.mouser.com/ds/2/333/2006_06_Pg04_Pg_05_820_840_860-17236.pdfAll I could gather is that it was new in 2006 with a MSRP of roughly 1,500, but I cannot find anyone selling one, no manual, no software, no accessories (not that I need but really cool: temp, humidity, psi) and the the seller knew nothing about it as he only received it along with a bunch of other tools as a payment from I guess the original owner.Now, I'm just getting into circuitry/components and I have a lot to learn, but don't have any experience to tell me whether this is a good tool or not, or how to make sure it is working properly. I was hoping someone here could help... maybe have some experience with this DSO. Is it considered a good tool?If by chance someone here has one and has a manual, please let me know! I will email Protek in the meantime... hope to get somewhere, as it seems others didn't have much luck in similar situations with Protek.I welcome any input/opinions on this device.Thank you in advance.

author: nidlaX
author_rank: Frequent Contributor
timestamp: March 20, 2017, 05:56:35 pm
content: It's a rebadge, I'm sure someone will figure out the OEM and post.In the meantime, why don't you try contacting them:https://www.gsi-protek.com/

author: Broo2
author_rank: Newbie
timestamp: October 28, 2017, 01:47:48 am
content: altfiddle,If you find a copy of the manual (or the drivers), could you share?I also found a good deal on a Protek 840; I have been looking for a power supply for this guy (9v 1A, 5.5mm x 2.1mm) but the deep socket for the barrel connector (22mm depth) has made it difficult to find.
Modern compact dual rail tracking power supplies? - Page 1
Forum section: electronics / testgear

author: bd139
author_rank: Super Contributor
timestamp: October 26, 2017, 11:57:51 pm
content: I'm after a new power supply. My Thurlby ones take up way too much space and they have coarse, fine control which is annoying the crap out of me if I'm honest. Also none of them are tracking.I am after something like an Agilent E3630 really but I want to buy something new and they're discontinued and too expensive anyway. Unfortunately everything you seem to be able to get now is either ridiculously expensive, has a noisy fan in it, blows up after 5 minutes, has horrible transients or is made of poo. I don't need LXI or fancy programming ability or even anything 10 turn pot wise. Just enough to set to 10mV resolution, 2x 20v outputs tracking with digital readout. Something I can short out and just leave it there without it burning the house down.Are there any pieces of gold I've missed in my search?Should I just wait for an E3630 to appear for a reasonable price?

author: cdev
author_rank: Super Contributor
timestamp: October 27, 2017, 01:01:19 am
content: My GW instek GPC-3020 has tracking and cost me around $50. Unfortunately it also has the loud fan problem. That said its easily fixable - meaning to do that one of these days..I would be happy to test it in any way you want me to- maybe to see how close the two outputs track.Other than the (very) noisy fan it appears to be good quality and the output is quiet enough to work fine powering SDR equipment.. I heard my first (very weak, low power) 10 meter beacons using this power supply as the SoftRock's power.

author: exe
author_rank: Unknown
timestamp: October 27, 2017, 09:53:33 pm
content: I'm building my own

author: nctnico
author_rank: Super Contributor
timestamp: October 27, 2017, 10:07:29 pm
content: I'm missing the new Keysight E36312A and E36313A on your list. If you don't need the accuracy then the GW Instek GPE-2323 would be my next choice.

author: bd139
author_rank: Super Contributor
timestamp: October 27, 2017, 11:44:00 pm
content: They're both off my spreadsheet because of the fan and smuggling them past SWMBO,I'm closing on an E3630 so far. I can get one for £200 cash from someone I know who just bought one expecting more amps for the money.
BK Precision 4053 or Rigol DG1022Z? - Page 1
Forum section: electronics / testgear

author: Hrvoje-CRO
author_rank: Contributor
timestamp: October 28, 2017, 01:00:26 pm
content: Hello everyone!I've found on ebay BK PRecision function generator, model 4053 brand new for 475USD. And the Rigol DG1022Z which is around 360USD, also brand new.What i want is quality, so i need help to decide which one to buy? What do you think, is the BK precision better quality than DG1022Z?And yes, i know, BK Precision 4053 is actually rebranded Siglent, right? Damn, i hate rebrandingThank you guys in advance!Regards,Hrvoje
DSO 6000 / DSO 6054A  - Page 1
Forum section: electronics / testgear

author: maxtee
author_rank: Contributor
timestamp: October 27, 2017, 06:17:01 pm
content: Hi dear people of this blog. I have a DSO 6054A, which requires your help. The scope pass all the tests but it doesn't read any signal at BNC on all 4 channels. I suspect it is a broken regulator/powersupply issue. Unfortunately the part number on this regulator is unreadable. I am attaching the picture and hoping someone can identify the part number. The silkscreen reference is U3505 and U3507.
Which scope should I keep? - Page 1
Forum section: electronics / testgear

author: MannyTC
author_rank: Newbie
timestamp: October 27, 2017, 04:25:44 am
content: Hi guys, I have two scopes that were given to me as I am starting out trying to learn stuff. I really don't think I need to keep two right now and was going to give one to my cousin. Wondering if you could help me decide which is the better one for me to keep. The two models are:Tek TDS1002BKeysight DS1052BThe Tek is 60MHz and the Keysight is 50MHz but I don't know if that difference should be the deciding factor. I would rather keep whichever is all around better unit. The Keysight seems much newer and is color where the Tek is not.Thanks!

author: ataradov
author_rank: Super Contributor
timestamp: October 27, 2017, 04:56:01 am
content: Keep Keysight. It has better screen and more memory. It is not even about color/BW, Tek screen is very slow.

author: capt bullshot
author_rank: Super Contributor
timestamp: October 27, 2017, 07:42:51 am
content: Keep both of them. One cannot have too many scopes and multimetersThe Tek is a very basic scope, but "it simply does it's job with no frills". I've used a similar model for many years in the past and I've been very satisfied with it. For todays standards, it's a poor scope.Don't know much about the Keysight, it also looks very basic. I'd suppose you to keep them both some time, try them, see which ones user interface you like more, which one is more responsive or more intuitive to use and keep this one (bad idea, keep both, one cannot have too many scopes and multimeters).

author: Mjolinor
author_rank: Frequent Contributor
timestamp: October 27, 2017, 08:09:58 am
content: Keep both. It is an irrefutable law of the universe that says if you shut one the other will break.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 27, 2017, 08:16:12 am
content: It isn't a bad idea to use both, at least until you know what each one does better and why. Using different models helps you form an opinion on what is nice to use and what isn't.

author: tautech
author_rank: Super Contributor
timestamp: October 27, 2017, 08:16:45 am
content: The Keysight DS1052B is a rebadged Rigol.A few minutes on Google shows it to be so.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 27, 2017, 08:18:20 am
content: Quote from: tautech on October 27, 2017, 08:16:45 amA Rigol with a pretty solid reputation to boot.
M9710 - Has Anyone used it? Electronic Load - Page 1
Forum section: electronics / testgear

author: TheRuler8510
author_rank: Regular Contributor
timestamp: October 26, 2017, 03:01:17 am
content: M9710 - Has Anyone used it?It is a Chinese Electronic Load. I really want to know if it gives a Watt/Hours reading at the end on a measurement. I can't tell from basic ads.ThanksTom

author: jpb
author_rank: Super Contributor
timestamp: October 26, 2017, 09:35:21 pm
content: See this thread on the similar m9711 (there is also a teardown review which I think is linked from the thread)https://www.eevblog.com/forum/reviews/maynuo-m9711-programmable-dc-electronic-load-photos/
Training signal bug in Keysight DSOX1000 series? - Page 1
Forum section: electronics / testgear

author: beuford
author_rank: Contributor
timestamp: October 22, 2017, 05:22:18 am
content: I recently purchased a Keysight DSOX1102G. I really like it; it's a lot of bang for the buck. However, while playing with the training signals I encountered a glitch and I was wondering if this is "normal" for the unit.The issue is a repeating glitch in the modulated AM training signal. The pictures below show the glitch as an aberration in every other modulation cycle. The cursor information for the X axis is correct for the spacing between the glitches. Successive pictures zoom in on the glitch.Can someone try this on their unit to see if it is normal?Thanks,Beuford

author: JPortici
author_rank: Super Contributor
timestamp: October 22, 2017, 06:58:06 am
content: that's the training signal: how to set up a trigger to catch the glitch

author: sibeen
author_rank: Frequent Contributor
timestamp: October 22, 2017, 07:40:22 am
content: JPortici is correct. I have a 3000T series cro, have just checked, and the signal is very similar. It's a training signal, a simple AM signal would be fairly boring

author: beuford
author_rank: Contributor
timestamp: October 22, 2017, 08:15:14 am
content: Funny... the manual doesn't mention this for the modulated AM wave form. However, the training menu does include *other* wave forms that are specifically described as containing a glitch.Beuford

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: October 26, 2017, 03:28:44 pm
content: Congrats on the new scope! I can confirm that this is an expected behavior, you can even see a shot of it on page 8 of the data sheet.If you're looking for a clean AM modulation, you can use the built-in waveform generator.
AT8612 Load - Power Voltage - Page 1
Forum section: electronics / testgear

author: jheatac
author_rank: Regular Contributor
timestamp: October 26, 2017, 04:42:56 pm
content: Hello,I just bought a AT8612 programmable load from AliExpress. The guy messaged me saying that it has the wrong input voltage. But I have also noticed the listing has been updated with about a $70 within about a day of purchase.The manual I found for the unit stated 110v-220v 42hz-62hz.His listing is for 220v 50hzDoes anyone know if these units support multiple input voltages?

author: LaurentR
author_rank: Frequent Contributor
timestamp: October 26, 2017, 06:20:17 pm
content: Please read this thread:https://www.eevblog.com/forum/testgear/applent-at8612-dc-load-a-quick-tear-down/There are several posts talking about input voltage and conversion.To summarize, it seems that they have a (recent) 110V and a (more common) 220V model and they do _not_ have a multi-voltage model (despite the switch in the back).Given the right wiring in the transformer it is likely possible to rewire it a 220V unit to 110V. Read the thread carefully, starting with Reply #32https://www.eevblog.com/forum/testgear/applent-at8612-dc-load-a-quick-tear-down/msg856238/#msg856238At least one user reported receiving a 220V-only transformer that cannot be converted to 110V, with Applent offering to sell the 110V-capable transformer.I was lucky to receive a 110V unit, so I didn't have to do the conversion (but was prepared to do so).
TC1 Colour Display Transistor Tester - 2.12k Firmware available? - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 25, 2017, 03:06:08 pm
content: Hi!A colleague at work gave me one of those little cream-cased TC1 Transistor Testers with the colour display and I fear he accidentally damaged it with a charged capacitor!This is the Chinese Version with the yellow PCB & SMPSU for measuring zeners > 5.6V - see p24 -25 of Karl Heinz's Manual dated 28-2-2017.Y.T. Videos show a picture of the leaflet that comes packed with many of these refers to "V2.12k" - does anyone know:-1) Is a schematic available or is it a drawing-out job?2) Is the 2.12k firmware available to program into a new AtMega324?I've had a look on:-https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/3675/but mention of v2 firmware seems to elude me!Should I just bin it or are the resources available - it'd be a handy introduction to ATMega programming for me!Chris Williams
Distribution AMp Design for NTBW50AA - Page 1
Forum section: electronics / testgear

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: October 24, 2017, 07:06:59 pm
content: I'm working on my test bench setup and want to distribute my Nortel Networks NTBW50AA GPSDO 10 MHz output to my older HP/Agilent/Keysight test gear. To that end, I'm thinking of making a 10 MHz distribution Amp that I might fit insode the NTBW50AA.The 10 MHz output from the NTBW50AA is a sine wave of 2 volts pp when driving into 50 Ohms and my RF meter measures it at 9.4 dBm. Most of the distribution Amp circuits I've found use 7400 logic to buffer and distribute likethis one which uses 74AC04sbut surely the square wave output will cause harmonics which is undesirable. I checked the 10 MHz output of the NTBW50AA and the 20 MHz harmonic is -37dBm which I think is high so here are a few questions:1. Am I worrying unnecessarily, are the 10 MHz inouts on my high end test gear pretty resilient to harmonics etc?2. Should I try to bandwidth limit the input before I distribute it to the test gear?3. Should I add LC filters on the outputs such asthese ones here?4. Do I need to AC couple my signals with capacitors?I'm thinking I'll design a PCB with SMA output connectors for my distribution, I can share here if others are interested.Any suggestions are welcome.
Probemaster, good first impression - Page 1
Forum section: electronics / testgear

author: WastelandTek
author_rank: Frequent Contributor
timestamp: October 24, 2017, 06:09:31 am
content: So, I have had this 1x/10x probe kicking around for some years. I'm not even sure where it came from; maybe it was with a scope, or some random hamfest lot. Here a couple months ago I ran over it with a chair roller and broke the spring loaded hook tip thing. Finally last week it percolated to the top of the project pile and I attempted to repair it with a combination of cyanoacrilate and heatshrink. Alas, I applied too much heat and buggered it up well and truly.The compensator body said "Probe Master model 3901-2" on it so, really without much hope, I googled it. I'm not even sure why I bothered, I mean, who the hell sells parts for their older products these days.Imagine my surprise when the manufacturers very helpful website indicated that not only do they sell the proper hook tip, but that it is in stock for $4.99US with free shipping! That was Friday, it arrived in today's post and is an exact replacement. It also came with a card earnestly urging me to call if I had any problems, and a 15% discount code should I want more probes...and looking around their site, I think I just might.They seem to manufacture some very nice probes, including perfect replacements for Tektronix P6063B, P6129B and similar probes with the readout actuator, for prices fairly comparable to what the dwindling old stock goes for on Ebay.It probably seems like I'm shilling for this outfit, but I had never noticed them before and I guess I'm pretty impressed so far.here is their probe to probe cross reference pagehttp://probemaster.com/scope-probe-to-scope-probe/I think I'm going to get me some for my Tek 5000 projects, they look really nice.

author: BravoV
author_rank: Super Contributor
timestamp: October 24, 2017, 06:16:05 am
content: Quote from: WastelandTek on October 24, 2017, 06:09:31 amThanks for the review, regarding the readout actuator, does it emulate perfectly as genuine Tek's probe ? What Tek scope did you test with it ?

author: WastelandTek
author_rank: Frequent Contributor
timestamp: October 24, 2017, 06:20:18 am
content: All I've got so far is the hook tip for the other probe. I don't have one with the readout yet. But they sell 4 different readout variants of their probes and call out specific ones for various Tek applications. I am pretty confident they will work, its just a resistor and an extra conductor.

author: macboy
author_rank: Super Contributor
timestamp: October 24, 2017, 12:13:47 pm
content: +1for Probemaster here too.Lots of folks around here hold their DMM probes in high regard. One thing I like about their DMM probes is that you can have them customized. For example, I had retractable-shroud banana plugs put on mine as I use them occasionally with DMMs having binding posts which don't take normal safety shrouded plugs.

author: nanofrog
author_rank: Super Contributor
timestamp: October 24, 2017, 01:36:53 pm
content: Another happy customer of Probemaster's products (both DMM and oscilloscope probs).
Has anyone ever heard of EZ Digital? - Page 1
Forum section: electronics / testgear

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 23, 2017, 10:09:48 pm
content: Browsing the web, I chanced upon this outfit. Apparently they still make or sell analog oscilloscopes, amongst other gear. It seems they are based in Korea and were at one time part of LG.It there any specific market that still requires these analog oscilloscopes? They don't seem to have any remarkable properties, nor are they cheap. Or is it a matter of a company that hasn't done much the past 10 years, as their own history seems to reflect? Has anyone heard of this company before?http://www.ezdigital.co.kr/https://en.wikipedia.org/wiki/GoldStar

author: boggis the cat
author_rank: Regular Contributor
timestamp: October 23, 2017, 11:12:13 pm
content: We used to see a fair amount of 'Goodstar', 'EZ Digital', and another branding that I can't recall. They were the cheap alternative before the Chinese manufacturers took off, and I believe a lot of rebranding used their instruments.They are pretty solid pieces of kit, but are not sophisticated.
sinking from sense terminals in 6632B - Page 1
Forum section: electronics / testgear

author: jkrbasu
author_rank: Contributor
timestamp: October 17, 2017, 11:35:30 pm
content: Dear EEVbloggers-I've got some HP 6632B 2 quadrant DC power supplies that I'm using to test some coin cell Li-Ion batteries.I've noticed that when I connect the S+ and S- sense terminals to measure voltage across the battery, the supply begins sinking current (about 3 mA). I've left the supply power terminals + and - disconnected.Does anyone have an explanation for this? I assumed that the "sense" terminals only measured voltage and didn't pass this much current.Thanks!

author: alm
author_rank: Super Contributor
timestamp: October 21, 2017, 11:02:14 am
content: Just connecting a large battery to a bench power supply can easily kill some power supplies or worse (what happens if the power supply shorts the battery terminals?). Pretty sure HP recommends disabling the over voltage crowbar and possibly series protection diodes on the output when charging batteries. The specifications will specify a maximum voltage between force and sense terminals, something like 0.5 - 1 V. You are exceeding this limits. Do not expect the power supply to behave in specification.My guess is that there are protection diodes or resistors between force and sense to limit the voltage when a sense connection becomes open. Your exceeding the maximum force-sense voltage will force current through those devices.
Londoners... Who do you use for calibration services? - Page 1
Forum section: electronics / testgear

author: purpose
author_rank: Frequent Contributor
timestamp: October 26, 2017, 07:32:19 pm
content: Evening all,Looking to get my Keithley 2015 calibrated locally-ish... any recommendations?Grassy arsepeter

author: bd139
author_rank: Super Contributor
timestamp: October 26, 2017, 07:55:45 pm
content: Calmet are in Hampton Wick near Kingston:http://www.calmet.co.ukI haven’t used them myself but I’ve had kit that was calibrated by them years ago and it’s still bang on.They’re not far from National Physics Laboratory which contains a lot of national standards as well.

author: purpose
author_rank: Frequent Contributor
timestamp: October 26, 2017, 08:00:18 pm
content: Many thanks... I'll check them out.peter
Hantek DSO5102P Filter Utility  - Page 1
Forum section: electronics / testgear

author: Peepholenz
author_rank: Newbie
timestamp: October 15, 2017, 12:18:56 am
content: Hantek DSO5102P Filter Utility - how do you make it work? Can set the filter (input Chan1) to say 20Khz lowpass (utility>page3> filter...) but a 1Mhz signal in Chan1 is not affected. So what is it supposed to do? Or,how do I turn it On?

author: Peepholenz
author_rank: Newbie
timestamp: October 20, 2017, 03:49:43 am
content: Filter now working.Fixed with new firmware courtesy of Amy at HantekMuch appreciatedPeter
Ballantine 6125B scope calibrator service info? - Page 1
Forum section: electronics / testgear

author: LazyJack
author_rank: Frequent Contributor
timestamp: October 18, 2017, 03:06:17 pm
content: Hi,I just scored a Ballantine 6125B amplitude and time calibrator. Looks like this is uncommon enough to not have any manuals or schematics available. Can anyone point me to service information?I haven't looked into this deeply yet. First examinations shows that the marker generator part seems to be working, but the amplitude calibrator part gives no output at all, although it does indicate the percentage of deviation. The unit is quite complex, yet modular, with cards in the motherboard.

author: Vgkid
author_rank: Super Contributor
timestamp: October 18, 2017, 04:28:10 pm
content: There is a manual for the A-spec model here:http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=06_Misc_Test_Equipment/Ballantine

author: LazyJack
author_rank: Frequent Contributor
timestamp: October 19, 2017, 11:10:40 am
content: Thanks. This can give some hints, although the B unit looks sufficiently different from this.
AimTTi LDH400P new DC load - Page 1
Forum section: electronics / testgear

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: October 19, 2017, 03:03:55 pm
content: AimTTi has just released the new Electronic DC Load with wider voltage LDH400P:data sheethttp://resources.aimtti.com/datasheets/AIM-LD400_LDH400_Data_Sheet_Iss1.pdfuser manualhttp://resources.aimtti.com/manuals/LDH400P_Instruction_Manual-Iss1.pdf

author: 4CX35000
author_rank: Regular Contributor
timestamp: October 19, 2017, 03:29:39 pm
content: Interesting place to put the HRC fuses on the rear.

author: MrW0lf
author_rank: Frequent Contributor
timestamp: October 19, 2017, 04:05:50 pm
content: I like TTi gear, has scientific vibe to it. Good for home lab deco if want to feel like real scientist. Place for fuses pretty clever, with 500V quite easy to go >400WFuses willblow outin proper manner

author: ElektroQuark
author_rank: Unknown
timestamp: October 19, 2017, 05:39:43 pm
content: 1495€
Need help identifying Shaft Encoder from HP 54540A  - Page 1
Forum section: electronics / testgear

author: ezalys
author_rank: Frequent Contributor
timestamp: October 19, 2017, 03:48:11 am
content: Hey guys! Any idea what model this shaft encoder is ? It saysJO 95111-2-16The O has a little squiggle through it. Not even sure how to identify the manufacturer!
what is the difference between a rigol DL3021 and the DL3021A - Page 1
Forum section: electronics / testgear

author: SteveWS5W
author_rank: Unknown
timestamp: July 17, 2017, 01:07:44 am
content: I have seen the spec sheet but nothing is jumping out?Steve

author: H.O
author_rank: Frequent Contributor
timestamp: July 17, 2017, 06:48:56 am
content: There are some differences.... The A model can do higher frequency, higher slewrate, has higher current readback resolution and wider range on resistance readback. It comes with LAN interface and digital I/O as standard.As far as I understand it's all software options and the A-model has those installed by default.Making the LAN interface optional is a big step in the wrong direction IMHO.

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: July 17, 2017, 10:40:43 am
content: I have done these 2 tables which may help

author: MotoDan
author_rank: Contributor
timestamp: October 18, 2017, 05:16:37 pm
content: The DL3021A also has a color screen.

author: Pinkus
author_rank: Frequent Contributor
timestamp: October 18, 2017, 10:20:49 pm
content: they both have the same color screen, but the DL3021 is using (almost) only one color.It is the same as with the DP832 and DP832a.Unfortunately it is not possible (well it probably is, but nobody was able to yet) to hack the DP832 so it thinks it is a DP832a.
Help evaluating a tek 465b - Page 1
Forum section: electronics / testgear

author: lem_ix
author_rank: Regular Contributor
timestamp: October 18, 2017, 06:51:16 pm
content: I am considering buying this scope as it has a decent price (110 eur) but I have no experience with these machines and the settings are all over the place. Why am I seeing double traces?Pics on local ebay clone:https://www.kupujemprodajem.com/big-photo-51716294-4.htm

author: bd139
author_rank: Super Contributor
timestamp: October 18, 2017, 06:58:01 pm
content: There’s something wrong with that. The buttons to the left hand side of the screen are the channel mode selector. Only one should be pushed down and they all are. Might be the locking bar broken or someone has munted it. It’s difficult to get to those switches to fix as well - whole thing has to be taken to bits. Other than that it looks in good condition.The two traces should exist. It’s a dual trace scope.

author: w2aew
author_rank: Super Contributor
timestamp: October 18, 2017, 07:04:26 pm
content: Quote from: bd139 on October 18, 2017, 06:58:01 pmAll of the vertical selection buttons can be depressed, perfectly OK. They are not mutually exclusive. Since both CH1 and CH2 are pushed in (selected), that's why you're seeing two traces. The Horizontal UnCal light is one, but that's because the vernier is not in the Cal position - again, normal. Scope Trigger light is on, again normal because LINE trigger is selected. The user hasn't focused the trace, or adjust the horizontal position correctly. Based on one picture - nothing obviously wrong, but it's impossible to tell more than that.

author: bd139
author_rank: Super Contributor
timestamp: October 18, 2017, 07:06:58 pm
content: Sorry I was thinking 465 not 465b.Well spotted.

author: lem_ix
author_rank: Regular Contributor
timestamp: October 18, 2017, 07:27:00 pm
content: Should reiterate, by double I mean the smearing on each of the two channels On one of the pics you can clearly see 4 lines while nothing is connected.EDIT:If it was focus wouldn't the smearing still be just one line even if really smeared?

author: lem_ix
author_rank: Regular Contributor
timestamp: October 18, 2017, 07:51:22 pm
content: To be more specific

author: Specmaster
author_rank: Super Contributor
timestamp: October 18, 2017, 09:03:39 pm
content: Surely the vertical switches all be returned to the normal "UP" position and the input switches set to select just one channel and the sweep set to either .1 or .02 mS, set the vertical and horizontal control to midway and select input ground on the input coupling switch. The trace observed at that point, which should be a single line and the focus control used to sharpen the line to its thinnest?I was always taught that was the basic and safe way to start of a scope and if things go south and you seem have get in a mess, return the controls to that position to check if trace etc is normal?
equiptek.com - Any experience ordering from this site? - Page 1
Forum section: electronics / testgear

author: itsbiodiversity
author_rank: Regular Contributor
timestamp: October 18, 2017, 04:47:34 pm
content: Good afternoon! Does anyone out there have experiences, good or bad, with ordering used equipment from EQUIPTEK.COM? I noticed some very competitive pricing of used instruments.Thanks.

author: ataradov
author_rank: Super Contributor
timestamp: October 18, 2017, 05:02:33 pm
content: STOP CAPITALIZING ALL YOUR TITLES.

author: itsbiodiversity
author_rank: Regular Contributor
timestamp: October 18, 2017, 06:31:14 pm
content: I appreciate your feedback; however, I am not singular in performing the ALL CAPS headlines. I will adjust according to your request as I like to keep the peace. I actually prefer all CAPS in writing often as it is very clear.Do you have anything meaningful to bring to this conversation or are you simply looking to chastise the use of CAPS?Peace.

author: ataradov
author_rank: Super Contributor
timestamp: October 18, 2017, 06:33:09 pm
content: Quote from: itsbiodiversity on October 18, 2017, 06:31:14 pmWell, no one else here is doing that.Quote from: itsbiodiversity on October 18, 2017, 06:31:14 pmNo, I just don't want to click on post, thinking it is a spam that has to be reported.

author: itsbiodiversity
author_rank: Regular Contributor
timestamp: October 18, 2017, 07:40:16 pm
content: understood, thusly.

author: simmconn
author_rank: Regular Contributor
timestamp: October 19, 2017, 12:00:53 am
content: I've known the owner personally for a few years now. It is a legit business owned by a competent guy.
Pushed the boat right out now with a Keighley 2100!! - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 26, 2017, 01:58:38 am
content: Hi!I've decided to push the boat right out now – I've been looking with covetous eyes on the 29–page Keithley 2001 saga, but there's none going anywhere spares or repairs just at the moment, but setting my sights a digit less (6.5 as opposed to 7.5!!) i saw a Keighley 2100 at the unbelievable price of £140 b.i.n. from Burgess Hill and had to pounce!!!!Sold "parts only" due to failed DC/AC calibration – have I bitten off more than I can chew here or will the good chappies here be able to help me get it to pass self–tests, until I can afford RS Cal next month?!Chris WilliamsPS!!There's good SMD soldering/desoldering tackle and a PCB cleaning tank/hot cupboard at work I can use out of hours!PPS!Do these have some sort of BGA device that would make drawing–out very difficult?!

author: Zucca
author_rank: Unknown
timestamp: October 26, 2017, 07:46:33 am
content: Nice, jump on the repair section for any help.

author: TheSteve
author_rank: Unknown
timestamp: October 26, 2017, 08:32:14 am
content: For more info on that meter you can also search for an Array M3500A.

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 26, 2017, 02:13:19 pm
content: Hi!From the pic on fleabay it looks like someone's whipped the carrying handle - I believe these meters along with many others are made with detachable handles for inserting in lab racks, etc., but if it does turn out to be missing when it arrives, would I be able to get a replacement carrying handle from Keithley, and can anyone suggest a part no - will a handle from their other meters fit?Chris Williams
Can you make a rudimentary TV using the XY mode on tek 3465   - Page 1
Forum section: electronics / testgear

author: Beamin
author_rank: Super Contributor
timestamp: October 16, 2017, 09:16:51 pm
content: That should be doable. Are there any circuits you can make that produce shapes or other things?I don't have a signal generator.

author: w2aew
author_rank: Super Contributor
timestamp: October 16, 2017, 09:28:58 pm
content: Quote from: Beamin on October 16, 2017, 09:16:51 pmI assume you mean Tek 2465 oscilloscope. If you've got a front end (tuner, demodulator) that gives you composite video, you can make a converter that takes the NTSC (or PAL) composite video and creates the X, Y and Z voltages to drive the scope - turning the scope into a crude video monitor - like this:And, here are a few videos showing XY graphics on an oscilloscope:

author: qu1j0t3
author_rank: Regular Contributor
timestamp: October 17, 2017, 12:23:12 am
content: Yes, definitely. I've been playing with a simple sawtooth generator using a 555 (use for X sweep) and you can generate Y voltages with a DAC - this only needs 11 digital lines so you can do this on something as small as a Duemilanove.More details/schematics on request.Example output from DAC & Arduinohttps://www.flickr.com/photos/qu1j0t3/23570965998/in/dateposted/

author: bsudbrink
author_rank: Frequent Contributor
timestamp: October 17, 2017, 03:45:17 pm
content: Can and have. See here:https://hackaday.com/2016/04/17/building-the-first-digital-camera/That's my project. I'm doing a followup with my own web page, but I'm not done with it yet.

author: rstofer
author_rank: Super Contributor
timestamp: October 17, 2017, 09:41:48 pm
content: https://www.sparkfun.com/products/retired/9306\An oscilloscope clock project.
Fluke 8845A VS Keysight 34461A opinions - Page 1
Forum section: electronics / testgear

author: itsbiodiversity
author_rank: Regular Contributor
timestamp: October 17, 2017, 08:52:47 pm
content: Hello all! I would love opinions on these two benchtop multimeters. FLUKE 8845A VS KEYSIGHT 34461A. The meters will be used in metrology - not in a "hobby" type of environment although metrology is my hobby. I will mention that the Fluke is approximately $150 USD less expensive. I have gathered quotes on getting the items calibrated and the cost is approximately the same for both of them. I do like the TEMP feature of the fluke 8845A as the meter will also be used to monitor a PRT. Does the 8845 allow for entry of ITS-90 coefficients or only CVD coefficients? I have a Fluke 5627A probe that I will be using. The meter will also be used to measure current from transducers. This meter will honestly be the workhorse for a lab so stability matters, along with usability.Thank you and I look forward to your opinions. I especially would love to hear from some of you who have owned both of these units, but if anyone has owned even one of the units please let me know your positives and negatives.I have searched the forum for direct comparisons and while they may have been indirectly compared I have not seen a recent discussion on these two models.

author: nctnico
author_rank: Super Contributor
timestamp: October 17, 2017, 08:58:37 pm
content: I had the same choice and I went for the 34461A because it can do things like trend charts by itself, save a screendump to USB etc. All in all the 34461A is a more modern instrument with the same specs. You might need the 34465A though for use with PT100 elements because IIRC the 34461A can't use these.

author: itsbiodiversity
author_rank: Regular Contributor
timestamp: October 18, 2017, 06:36:18 pm
content: Thank you nctnico for the advice. The charting features are not that relevant to me, and after researching I believe you are correct that the 34461a may not perform as a prt readout in the manner that I would like it to. I spoke to Fluke today and the 8845A will also not be the best option - the 8846A would be better for what I am trying to do as it allows storing of PRT coefficients etc. I think the best route to go may be to buy the less expensive of the DMM and find a dedicated resistance readout for the PRT.Thanks.
Keysight E36312A first impressions - Page 1
Forum section: electronics / testgear

author: capt bullshot
author_rank: Super Contributor
timestamp: October 16, 2017, 03:25:28 pm
content: So I've got the HPAK E36312A that I won at the "Power Your Bench" contest:https://www.eevblog.com/forum/contests/power-supply-contest!-free-e36312a/Just arrived home, there she was. Couldn't wait to open the box. Don't turn it on, tear it apart time! OK, I only did a very basic teardown, opened the top cover and did some photos. Just enough to see the big toroidal transformer and the STM32F4 used as the main controller.At first glance, the supply is very solid and well made. The enclosure looks and feels like good stuff. The display has a good contrast and wide enough viewing angle (sorry for the bad photos, I'll try better ones somewhen later).BTW photos: you find them here:http://wunderkis.de/E36312A/rawpic/Checked some output voltage values against a HP34401A - 4 digits bang on.UI: Lots of menus to discover, basic settings like output voltage /current limit are dead simple and intuitive. Very nice: each one button for each channel on/off plus one for all together. Seperate buttons for each channel to select them for setting, numeric keypad entry - enter your desired voltage, press Enter, done!Yes, it has a fan. Without a serious load it runs quiet.Bootup time is okay (8 seconds from cold start, 6 from standby).Now for the bad:The output binding posts are in + - Earth + - + - order. IMO this is plain wrong and counterintuitive. Correct would be - + Earth - + - +Afaik HPAK does this on all its power supplies this (wrong) way.The supply does not have a real power switch. The button on the front is just a standby switch, turning off the display. In standby, the unit has a whopping 10W of power consumption, this is quite bad.

author: nctnico
author_rank: Super Contributor
timestamp: October 16, 2017, 04:21:12 pm
content: There is an existing thread already!

author: rsjsouza
author_rank: Super Contributor
timestamp: October 17, 2017, 12:30:06 pm
content: I received mine yesterday as well. First impressions are in a Youtube video on my channel (in portuguese, sorry) and the overall impression was similar to yours, minus the order of the output posts (I really don't mind).