hybridfree/eevblog-posts huggingface dataset:
Unless someone else already posted it DS1000Z english manual... - Page 1
Forum section: electronics / testgear

author: alank2
author_rank: Super Contributor
timestamp: October 17, 2013, 01:14:11 am
content: Unless someone else already posted it, it looks like they finally got the DS1000Z english manual done:http://www.rigolna.com/download/501G0000000TzLDIA0/

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 17, 2013, 09:19:21 am
content: Thanks, well, the scope is so feature rich... Agilent should come up with a DSOX2000 successor.

author: casper.bang
author_rank: Frequent Contributor
timestamp: October 17, 2013, 09:57:38 am
content: Direct link, without having to sign up to anyting:http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-033a/0/-/-/-/-/file.pdf

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 17, 2013, 10:03:20 am
content: I filled the form with some random names and email address...It works.

author: casper.bang
author_rank: Frequent Contributor
timestamp: October 17, 2013, 10:04:20 am
content: Quote from: Hydrawerk on October 17, 2013, 10:03:20 amYup but it also spams Rigol. Hmm I can't figure out whether it has segmented memory or not.

author: metalphreak
author_rank: Frequent Contributor
timestamp: October 17, 2013, 12:21:19 pm
content: Sweet. I can get some reading done before mine arrivesMy credit card finally got charged for it yesterday, so it should be on its way soon.

author: metalphreak
author_rank: Frequent Contributor
timestamp: October 19, 2013, 05:51:46 pm
content: Quite a few mistakes in the manual haha. The arbitrary waveform section refers to the DS2000A
How to replace the meter movement in an old Simpson 260 multimeter - Page 1
Forum section: electronics / testgear

author: w2aew
author_rank: Super Contributor
timestamp: October 14, 2013, 04:05:35 am
content: Here's a video I put together documenting the replacement of the meter movement in a 50+ year old Simpson 260 multimeter.

author: staxquad
author_rank: Frequent Contributor
timestamp: October 14, 2013, 05:06:02 am
content: An ebay purchased Simpson 269 came movement defective, and after determining what was wrong, stored it for a future fix, which hasn't happened almost a decade later. Oh well....

author: pickle9000
author_rank: Super Contributor
timestamp: October 14, 2013, 05:28:08 am
content: Nice video, a small piece of double sided tape in a lower corner of the meter panel is great for catching bits floating around near the movement (carpet tape was used way back). I'm sure you know this... but for others, laying the meter on it's back will improve accuracy assuming it was calibrated on it's back.

author: jh15
author_rank: Frequent Contributor
timestamp: October 14, 2013, 05:34:43 am
content: If the movement is properly balanced, should not shift from vert to horiz. Look at the tiny spring weights on the nether end of the needle.

author: pickle9000
author_rank: Super Contributor
timestamp: October 14, 2013, 06:05:32 am
content: Ideally that is the case (the movement won't change) but many meters in my experience do change (for whatever reason be it time, treatment or construction). Of course as with any test instrument the main idea is to have an understanding of how you equipment reacts, and that is what I'd consider important.
Excellent Value! - Page 1
Forum section: electronics / testgear

author: echen1024
author_rank: Super Contributor
timestamp: October 14, 2013, 01:53:57 am
content: Not sure I would pay $2082 for this. And 426 watchers? Wtf...http://www.ebay.com/itm/True-NEW-FLUKE-15B-F15B-Digital-Multimeter-w-Free-Case-/320802917216?pt=LH_DefaultDomain_0&hash=item4ab1580b60

author: c4757p
author_rank: Super Contributor
timestamp: October 14, 2013, 01:56:15 am
content: But dude, you get afree case! That's worth at least $2000...Seriously... they do that to avoid relisting fees. They're all out of them and want nobody to buy it. The watchers are waiting for it to be back in stock; they'll drop the price.And if somebody really is enough of a dumbass to buy it at that price, for $2000 somebody can run right out and buy one to send them...

author: mrflibble
author_rank: Super Contributor
timestamp: October 14, 2013, 02:19:11 am
content: Quote from: c4757p on October 14, 2013, 01:56:15 amRegular price seems to be $82.50.

author: echen1024
author_rank: Super Contributor
timestamp: October 14, 2013, 02:52:30 am
content: Quote from: c4757p on October 14, 2013, 01:56:15 am. Exactly. So that's the reason... No relisting fees. And for excellent value, there was that 3458a for $3

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: October 14, 2013, 03:00:27 am
content: Quote from: echen1024 on October 14, 2013, 02:52:30 amThe relisting fee isn't the main reason, as it's only a few cents for volume sellers. The main reason is to maintain the selling history. If an item is sold out, all the "sold" history would be gone and relisting it will not reinstate it.

author: c4757p
author_rank: Super Contributor
timestamp: October 14, 2013, 03:02:01 am
content: Good point.

author: Rick Law
author_rank: Super Contributor
timestamp: October 14, 2013, 03:26:44 am
content: Oops, I just clickedBuy Nowby mistake...Who said I have no sense of humor....

author: Caca
author_rank: Contributor
timestamp: October 14, 2013, 08:28:37 am
content: Quote from: Rick Law on October 14, 2013, 03:26:44 amjust let us know how much is that free case worth when it arrives to see if others should buy that too.
Hantek MSO5102D setting the system clock - Page 1
Forum section: electronics / testgear

author: Ringtone
author_rank: Newbie
timestamp: October 14, 2013, 12:53:30 am
content: Hi all.I've recently received my Hantek MSO5102D.All is working as expected, and generaly i'm happy.But (and theres always a but).How do you set the system time.Mine is showing China time. so following the on screen instructions:-utility menu page 2,F4 (time),"use the knob V0 to sellect the option"---all good so far hour selected,"pressV0 and the option turns red"---- still good hour is now red,"Activate the option. turn V0 to set value"---??? how? no matter what I press, turn or twiddle the hour wont change. either nothing happens or the box turns black and the highlighted option changes.Is this a firmware bug? am i doing somthing wrong or am I just going mad?
Keithley 172A teardown in pictures - Page 1
Forum section: electronics / testgear

author: reagle
author_rank: Unknown
timestamp: October 13, 2013, 10:47:49 pm
content: Just did a quick teardown on a 1980-s vintage Keithey 172 multimeter:http://kuzyatech.com/keithley-172a-dmm-in-picturesAs always, a beautiful old instrument!
Multimeter Data read out Metrahit EXTRA Xtra - Page 1
Forum section: electronics / testgear

author: mahwe
author_rank: Contributor
timestamp: October 06, 2013, 11:52:15 pm
content: hi ,has anybody try to readout the multimeter gossen metrahit extra or xtra ,without the USB X-tra adapterhttp://www.gossenmetrawatt.com/deutsch/produkte/usbx-tra.htm.

author: Napalm2002
author_rank: Regular Contributor
timestamp: October 08, 2013, 05:01:45 pm
content: No but I have a drantech outdoor. Same as gossen metrawatt. I would be curious to know as well

author: eb4eqa
author_rank: Regular Contributor
timestamp: October 13, 2013, 08:49:21 pm
content: Yes, with limited success. I think the Xtra and the Energy use the same interface. Seehttps://www.eevblog.com/forum/testgear/metrahit-usb-ir-diy-interface/msg221320/#msg221320Roberto
EX330 No Contact Voltage Sensor - Page 1
Forum section: electronics / testgear

author: geo_leeman
author_rank: Regular Contributor
timestamp: October 11, 2013, 12:30:03 am
content: Hello all. I picked up an Extech EX330 for a cheap meter in my daily carry bag. I've a PhD student and work on lots of analog circuitry, but a lot of the lab equipment is operated on the mains. The no contact voltage sensor is a great way to ensure the equipment is dead before we tear in. While playing with the meter I noticed an odd thing. When holding down the button for NCV measurement if you tap the top of the meter the beep occurs and the red lights flash like there is AC voltage....Any ideas on why this happens?

author: thomastheo
author_rank: Regular Contributor
timestamp: October 11, 2013, 12:40:59 pm
content: I also have one of those, and just tried it on my unit. It behaves just as you described, so I doubt its just a problem with your meter. Weird...

author: geo_leeman
author_rank: Regular Contributor
timestamp: October 11, 2013, 03:21:10 pm
content: I opened up the unit last night and can't see anything that should be shock sensitive. It's just the metal plates, a spring contact, and not much more. Maybe I'll see if shocks to the unit cause variations in measurements when just measuring DC voltage/current? I'm glad to hear it's a general problem...

author: Robomeds
author_rank: Frequent Contributor
timestamp: October 11, 2013, 10:05:37 pm
content: Your body is a capacitor. The movement of your hand probably causes enough of a voltage due to moving the capacitive plate that is your hand to cause the NCV sensor to momentarily detect a voltage. I would think this is somewhat similar to how waving your hand over the meter without leads can cause non-zero readings.

author: geo_leeman
author_rank: Regular Contributor
timestamp: October 12, 2013, 07:58:25 pm
content: I'm fine with the idea of the human capacitor. I really think this is a physical shock effect though. I've tapped the top of the meter onto wood, plastic, and other surfaces. All give me the same effect. This thing has to detect AC, so that seems to no line up with your idea either.

author: ConKbot
author_rank: Super Contributor
timestamp: October 12, 2013, 08:18:40 pm
content: When you shock it mechanically the metal sensing plate inside moves closer to and further way from the plastic (higher dielectric constant than air) as it vibrates, which changes its capacitance, which produces a voltage which it detects

author: geo_leeman
author_rank: Regular Contributor
timestamp: October 13, 2013, 12:57:32 pm
content: Quote from: ConKbot on October 12, 2013, 08:18:40 pmThat makes sense. I guess it's just the marginal construction on these lower end meters. Thank you for the reply!
About EUCOL LCR Meter - Page 1
Forum section: electronics / testgear

author: Carrington
author_rank: Super Contributor
timestamp: October 12, 2013, 06:46:05 pm
content: Anyone know anything about EUCOL?http://www.eucol.com.cn/html/en/index.php?ac=article&at=list&tid=101What do you think about these instruments?Is this the original manufacturer of all this LCR bridges?Some allow change the internal DC bias, and others have a basic accuracy of 0.05%!

author: Vgkid
author_rank: Super Contributor
timestamp: October 12, 2013, 08:01:43 pm
content: The manufacturer is Tonghuihttp://www.tonghui.com.cn/en/goodsgroup/4.html

author: Carrington
author_rank: Super Contributor
timestamp: October 12, 2013, 08:12:58 pm
content: Quote from: Vgkid on October 12, 2013, 08:01:43 pmVgkid thank you very much!I'm sorry, because surely the forum have other post for TONGHUI LCR Meter.This funny because the TH2822x and U822x are very similar, but the basic accuracy is not the same. So they should not be clones.

author: Vgkid
author_rank: Super Contributor
timestamp: October 12, 2013, 09:28:09 pm
content: No problem, I kind of have he Tonghui bench LCR meter numbering system memorized.

author: Carrington
author_rank: Super Contributor
timestamp: October 12, 2013, 10:12:34 pm
content: More clones, or not?http://www.jinko17.com/Product.asp?Catalog=1http://www.ebay.com/itm/Bench-LCR-Meter-200KHz-Inductance-Capacitance-RZDQ-Test-Component-Sort-JK2816C-/271293530018Jinko! 50Hz to 200KHz, DC bias: 0.1V, 0.3V, 1V and basic accuracy of 0.1%

author: Vgkid
author_rank: Super Contributor
timestamp: October 13, 2013, 03:31:03 am
content: It is either a clone or a rebadge.
Help with a BK2120 Oscilloscope. - Page 1
Forum section: electronics / testgear

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: October 12, 2013, 04:59:10 am
content: I purchased this scope and it came set to 110V but can be changed (not easily but can be just the instructions are not vary good at explaining it to me on how) to 120V, 220V, and 240V. What should that be set for the United States?

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: October 12, 2013, 02:12:18 pm
content: Thanks, and as I mentioned it needs to be set for the USA.It came set for 110V but my mains, in the last 20 years in all of the places I have lived, is 120-122VAC.So, my question is what is the ideal voltage to set this? I do not understand why it even has a 110Vac and a 120vac voltage selector in the first place.Anyone know?

author: fpliuzzi
author_rank: Regular Contributor
timestamp: October 12, 2013, 03:39:29 pm
content: Personally, I would set the scope for 120V operation in the USA. Also, since you were curious... here is a Wikipedia page that shows some of the countries that use 110V mains.http://en.wikipedia.org/wiki/Mains_electricity_by_countryRegards,Frank

author: Dark Prognosis
author_rank: Regular Contributor
timestamp: October 12, 2013, 05:33:05 pm
content: Thanks for all of that.I will set it up for 120.
Agilent u1272a firmware - Page 1
Forum section: electronics / testgear

author: ilikepez
author_rank: Regular Contributor
timestamp: April 26, 2013, 06:39:16 pm
content: New firmware for the U1272A, apparently came out over a month ago. I can't find a changelog for it, does anyone know of one? Any major changes?

author: ilikepez
author_rank: Regular Contributor
timestamp: April 26, 2013, 07:27:04 pm
content: Well false alarm. The firmware says version 2.0 and is dated on their site 2013-3-20 but it actually came out two years ago.

author: lowimpedance
author_rank: Super Contributor
timestamp: October 08, 2013, 10:51:04 pm
content: Excuse the dredging of this old post,I noticed that firmware version 2.04 has been posted for download on the Agilent site (5/7/2013). FYI if you have one and missed the update notification.http://www.home.agilent.com/upload/cmc_upload/All/U1271_72_firmware_release_2.04.txt

author: greg_gsg
author_rank: Newbie
timestamp: October 11, 2013, 03:53:00 pm
content: HiI downloaded the new firmware today but the application that loads it on the multimeter doesn't seem to work...It installs fine but if I try to run the application I get an "unhandled win32 exception".I have tried it on two PCs with different OS (Win7 and XP)... Still scratching my head...The PC to multimeter link is OK, since the data logging application is working on both PCs..Greg

author: zaoka
author_rank: Frequent Contributor
timestamp: October 11, 2013, 07:12:09 pm
content: They still did not disableBEEEEEPtone when meter starts or exiting sleep mode...

author: saturation
author_rank: Super Contributor
timestamp: October 12, 2013, 04:45:34 pm
content: Thanks for the headsup, the latest firmware adds a new function but haven't had a chance to install it.
Info Tektronix TLA624 - Page 1
Forum section: electronics / testgear

author: vaualbus
author_rank: Frequent Contributor
timestamp: October 12, 2013, 09:57:14 am
content: I'm going to buy a "new" logic analyzer and I've found this logic analyzer on ebay for couple of hundred of dollars.The Tektronix TLA624 is a great logic analyzer?If not what I shoul buy?For what should be the maximum price for it?Best regards, Alberto Vaudagna.
Sony/Tektronix 336 Manuals - Page 1
Forum section: electronics / testgear

author: Gravity1337
author_rank: Newbie
timestamp: October 12, 2013, 03:41:49 am
content: I recently inherited a Sony/Tektronix 336 and have figure most of it out, but there are a couple things I'm still sorting out. Anyone have PDFs of the operation and/or service manuals floating around?thanks!

author: Unknown
author_rank: Unknown
timestamp: October 12, 2013, 04:12:43 am
content: Can't find a free source (doesn't mean that it doesn't exist). They're available fromArtek Manualsfor $12.50. He delivers excellent quality scans, but not for free.

author: Gravity1337
author_rank: Newbie
timestamp: October 12, 2013, 04:40:28 am
content: I wasn't able to find any free either and most of the pay options seemed a bit shady. This looks a lot more reasonable, thanks!
LeCroy 9400 Screen Update Problem? - Page 1
Forum section: electronics / testgear

author: corrado33
author_rank: Frequent Contributor
timestamp: October 12, 2013, 12:57:11 am
content: Hi all,Just a quick one here. I've been playing with a LeCroy 9400 recently and was wondering something. Every once in a while when I'm looking at a signal, some relay will switch in the device and the screen will pause (aka stop updating). After 2 or 3 seconds, it'll continue it's normal operation.Is this normal? Is it a known fault? What could be going on? A quick google search didn't turn up anything.

author: digsys
author_rank: Unknown
timestamp: October 12, 2013, 01:20:42 am
content: It's just the system re-calibrating for temperature (amongst other variables). Once it is warm, itshoulddo it less and less.If it doesn't stop re-calibrating after a warm up period, then it may need factory / lab calibration, or there's a aged(?) component,like one of mine has. It's a good thing :-)

author: corrado33
author_rank: Frequent Contributor
timestamp: October 12, 2013, 01:37:30 am
content: Very cool! I usually don't have it on very long so that could definitely be it. The scope itself does have a few issues (like I can't get the B input button to work...) but now I know nothing is seriously wrong, so that's good!

author: marshallh
author_rank: Unknown
timestamp: October 12, 2013, 02:41:26 am
content: Yeah, seems to be a hallmark of Lecroy scopes.. my 9374C does also, albeit less so after about 30mins of being on (probably because the room around it has increased by 10 degrees in temperature)

author: digsys
author_rank: Unknown
timestamp: October 12, 2013, 02:45:45 am
content: You can find the service manuals on the web. There's a couple posts on these forums with the links, but shouldn't be hard to find.
Error 7240 and 7250 on a  Tektronix 2440 scope - Page 1
Forum section: electronics / testgear

author: hary
author_rank: Contributor
timestamp: October 11, 2013, 04:38:41 pm
content: Hi.I'm looking to buy my first scope.But scope are not cheap in France and there seem to be not a lot on the second hand market.I'm on a Tektronix 2440 but it seems to give 7240 and 7250 error code at the startCould anybody tell what are these issues, are they important issues, and are they possible to fix.The Tektronix 2440 is a digital scope despite most of the threads advise an analog one for beginners, but the analog ones I find are almost the same price (I am also on a HAMEG HM303-6).On top of that it seems that the Tek2440 has been a really good scope some years ago.Thanks for your reply.

author: echen1024
author_rank: Super Contributor
timestamp: October 11, 2013, 06:05:00 pm
content: http://www1.tek.com/forum/viewtopic.php?f=5&t=5350.What about a new digital, such as a Rigol DS1052E?

author: Orange
author_rank: Frequent Contributor
timestamp: October 11, 2013, 06:11:40 pm
content: When these models where introduced in 1987 or so, they where very nice systems. I used them a lot. Time has passed, and the digital models of the tek 2400 range are now obsolete. Their weak point is the used hybrids inside. The CCD and CCD driver often fail in these models. if that happens your out of luck. Replacement hybrids are difficult to find. If you find them, you will will pay a premium for them....Faults in the 7000 range are analog related, possibly the CCD hybridBetter let this 2440 go, you will be disappointed if it cannot be repaired. And it is not a beginners scope...

author: hary
author_rank: Contributor
timestamp: October 11, 2013, 06:28:13 pm
content: Many thanks for the advice.Yes I've been thinking about the so told RIGOL 1052E.For 300€, get a brand new digital scope with a 3 years warranty, nice, small and light !I don't know what to do. I'll spend some more time to see if I can get a 20-40€ analog one, otherwise, I would get one of these RIGOL 1052E.
Spectrum Analayzer - Page 1
Forum section: electronics / testgear

author: eurofox
author_rank: Unknown
timestamp: October 10, 2013, 04:27:54 am
content: Hi guy's,Someone got experience with this spectrum analyzers?http://www.triarchytech.com/eurofox

author: Psi
author_rank: Super Contributor
timestamp: October 10, 2013, 04:35:57 am
content: Yeah, that looks quite interesting.Be nice to have something that does the 5.8Ghz band for testing FPV antennasI'd be interested to get some RF peoples opinions on the specs of those.If there's any serious traps or lacking in them.

author: mswhin63
author_rank: Frequent Contributor
timestamp: October 11, 2013, 01:02:07 pm
content: Nice and compact although if essential it has a fairly poor sensitivity, but that would depend on the application used for.I think price versus specs it is quite reasonable although I am sure there are many other Spectrum analysers out there hiding amongst the search engines.I am currently not looking for one at this stage though but it most probably not suit me due to sensitivity.

author: Carrington
author_rank: Super Contributor
timestamp: October 11, 2013, 01:20:44 pm
content: Very interesting, I would buy one if the price was 10 times lower.Please take it apart?Only one negative feedback:http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback2&userid=triarchy_tech&iid=-1&de=off&items=25&which=negative&interval=180&_trkparms=negative_180The software includes examples:http://www.triarchytech.com/Downloads/TSA6G/TSA_SW.zipOne video:http://www.edn.com/design/test-and-measurement/4412405/Low-cost-spectrum-analyzer-product-roundup
Siglent SDS1102CNL  or  Owon SDS7102V ? - Page 1
Forum section: electronics / testgear

author: roberto.pietrafesa
author_rank: Newbie
timestamp: October 10, 2013, 02:48:26 pm
content: Dear friends,I'm perfected aware that it's probably impossible to answer a question like this without delving into the topic.But, if you try to make an effort, what would you choose between these two models?Thank you very much indeed.I appreciate your help.Roberto.

author: rf-loop
author_rank: Super Contributor
timestamp: October 11, 2013, 07:03:26 am
content: Why you select here Siglent SDS1102CNL and then Owon SDS7102VYou select lowest memory Siglent and then 10M + 10M full speed memory Owon.Just this Siglent model have 20k capture memory. (20k+20k or in single channel use 40k with these horizontal speeds what use 1GSa/s)Siglent have also CML models what have this same "short memory" plus max 2M capture memory "long memory". (this long memory maximum speed is max 500MSa/s) With very low speeds both models have 6M continuous recorder memory.If think Owon and your named Siglent model they are really far away each others.Owon can use full 1GSa/s down to 0.5ms/div horizontal speed. It have 10M + 10M full speed capture memory.Here tiny example about sampling speed:Simple example if look horizontal speed 100us/divSiglent CNL max 5MSa/s (20k memory)Siglent CML max 100MSa/s (max 2M or 1M + 1M memory)Rigol DS1000E 100MSa/s (max 1M or 0.5M + 0.5M memory)Owon SDS710210M memory 1 Channel use 1GSa/s10M + 10M memory 2Channel use 500MSa/s per channel1M memory 1Channel use 500MSa/s1M memory 2 channel use 500MSa/s per channelIF sampling speed is not important and IF signal capturing fidelity is not so important and IF display TFT quality is not so important or if do not need battery. I select this Siglent. Becouse its UI better and more fetures. It have dual timebase ALT, It have window zoom (Owon have zoom but it is not windowed - but not only cons, it have also pros, Owon zoom change also samplerate related to zoomed timebase - normally windowed zoom in cheap scopes use main window samplerate)Owon TFT is 8" 800x600 and Siglent 7" 480x234 Owon wiev angle and contrast is better.Owon front end is more linear, sampled displayed waveform have more real resolution, capturing have less sampling noise. This is becouse Owon use far better ADC system as Siglent.These are so far away from each others that I do not give poll answer at all.Both have pros and cons, both have weak and strong things but very very different.It is fully dependent end user individual needs which one win in his case.Siglent SDS1102CNL is is cheaper than Owon SDS7102VIf you go to Owon OR Siglent, look what version you buy. (I mean version, not just model)Specially with Owon, buy only newest version or if seller is real professional and original manufacture lot is before JUN/JUL 2013 that scopes have later in Owon accepted workshop updated hardware!Best to buy from local seller who is not only box "reshipper" but also really know what he is selling.There you can, if want, take both scopes on the table and look with real signals and also professional seller can advise with use.
What happened to my Agilent U1733C, need advice - Page 1
Forum section: electronics / testgear

author: kamcm
author_rank: Regular Contributor
timestamp: October 10, 2013, 02:49:11 pm
content: I Purchased the Agilent U1733C from Element14 and just received it today. However, it did not work as expected.I have upload the video to youtube.http://youtu.be/uBiZHhsglJEhttp://youtu.be/aZdxSU-2Jk8http://youtu.be/F6rjtmMhrfkPlease advice,Regards,Kam

author: Sander
author_rank: Contributor
timestamp: October 10, 2013, 06:11:22 pm
content: If intuition fails, read the manual. If that doesn't solve the problem, contact Agilent (or Element14).

author: Wytnucls
author_rank: Super Contributor
timestamp: October 10, 2013, 07:06:05 pm
content: Shorting the leads doesn't achieve anything.Measure some known values of resistance, capacitance and inductance and see if the readings are within specs. Make sure the calibration has been done properly and use the guard lead whenever possible.
Gossen Metraline 16 DMM - Page 1
Forum section: electronics / testgear

author: Wytnucls
author_rank: Super Contributor
timestamp: October 10, 2013, 03:10:18 am
content: There is a new line of 'budget' DMMs released by Gossen. I haven't found a price list for any of those on the net yet. Are any of the German members familiar with these and their street value?http://www.gossenmetrawatt.com/resources/tt/metraline_dmm16/db_gb.pdfhttp://www.gossenmetrawatt.com/resources/tt/metraline_dmm15/db_gb.pdf

author: chibiace
author_rank: Regular Contributor
timestamp: October 10, 2013, 03:36:21 am
content: cant say the case design excites me.there is a 15 too. slightly lower cat ratingno ordering info on their website?? what??

author: Wytnucls
author_rank: Super Contributor
timestamp: October 10, 2013, 03:46:50 am
content: It is the classic Metrahit case with a new paintjob. The protective shroud is available as an option.6000 count meters TRMS.Extra features on the model 16:1000V CAT III, 600V CAT IV instead of 600V CAT III onlyRPMCaps 40nF-400uFFrequency 1 MHz and duty cycle instead of frequency only 1KHzBacklightTemp F/C instead of C onlyBar graph update rate 30/sec instead of 20/secDisplay update rate 3/sec instead of 2/sec

author: algorath
author_rank: Contributor
timestamp: October 10, 2013, 04:11:59 am
content: only price i could find is fromhttp://www.datatec.de/Gossen-Multimeter-M196A-Metrawatt.htmfor 259€

author: Wytnucls
author_rank: Super Contributor
timestamp: October 10, 2013, 04:16:03 am
content: Thanks Algorath. 259 Euros +VAT! Ouch.

author: algorath
author_rank: Contributor
timestamp: October 10, 2013, 06:50:55 am
content: yea €259+vat (which is 19% in germany) is quite hefty. so much for "budget" gossen meters lol

author: Wytnucls
author_rank: Super Contributor
timestamp: October 10, 2013, 07:20:36 am
content: Hopefully, the model 15 is much cheaper, but somehow, I doubt it.

author: nanofrog
author_rank: Super Contributor
timestamp: October 10, 2013, 05:58:16 pm
content: Quote from: Wytnucls on October 10, 2013, 04:16:03 amAnd the rubber holster is extra with this price? Cheap bastards!

author: echen1024
author_rank: Super Contributor
timestamp: October 10, 2013, 06:07:39 pm
content: I contacted gossen. It is about $235 in the US
Video: Controlling Measurement Equipment with Python and SCPI via VXI-11 and USB - Page 1
Forum section: electronics / testgear

author: clifford
author_rank: Regular Contributor
timestamp: October 10, 2013, 05:58:30 pm
content: Hello,I have made my 2nd EE video:http://youtu.be/a0VKY9klUjQIt is about controlling testgear via VXI-11 (TCP/IP) and USBTMC from Linux using Python scripts. (I believe I have included all relevant information for windows users, but I'm not sure as I never have done this kind of stuff on windows.)Warning: The video is almost one hour long and I'm afraid it is not as entertaining as Dave's marathon videos are.OT: Lessons learned on the video-making side of things:Never shoot a screen with a camera resolution high enough to subsample the screen resolution. I accidentally had the camera on 1080p for the whole shoot; sorry for the moiré pattern.I need better control over the light at my bench. Whenever the light (from outside through the window) changed, my white-balance and exposure got off.I need to switch to manual focus when filming the parts where I talk at the paper. The camera always tries to focus on my hand if I point on something on the paper. Unfortunately I was not able to see the slight out-of-focus on the display on the camera while shooting.Additional feedback welcome! I'm still learning and probably missed half the things I did wrong this time..
Is my  Tektronix 7104 irreparably damaged? - Page 1
Forum section: electronics / testgear

author: bottlegardener
author_rank: Contributor
timestamp: October 10, 2013, 02:14:06 pm
content: Hi folks,I'm not an EE, just a hobbyist who uses (used) his scope for audio equipment repair and calibration (e.g. adjusting the azimuth of analog tape machines).Recently my Tek 7104 mainframe started billowing a small amount of smoke and its trace shrunk considerably (like it was only a couple inches and very bunched up).I was just wondering if this is a common failure mode and if anyone could let me know what's up? I took apart the PSU and nothing was visible burnt.If the mainframe is toast, would it be reasonable to hope the plugins (Tektroniix 7A18 Dual Trace Amplifier; Tektroniix 7B53A dual time base Dual Trace Amplifier; Tektroniix 7A26 Dual Trace Amplifier; and Tektroniix 7B92 Dual Trace Amplifier) escaped unscathed? I shut it down fairly quickly...Thanks,Peter

author: VintageTekFan
author_rank: Regular Contributor
timestamp: October 10, 2013, 02:25:22 pm
content: Sounds to me like a problem in the HV supply. There is a metal shield protecting it. Be careful! There are some high voltages that could still be lingering.

author: Orange
author_rank: Frequent Contributor
timestamp: October 10, 2013, 02:48:16 pm
content: Probably a tantalum capacitor. This can be in the mainframe or in one of the plug-ins....Measure the power-supply rails for shorts. Hopefully it is in one of the plugins, that is the easiest to repair.

author: bottlegardener
author_rank: Contributor
timestamp: October 10, 2013, 04:46:03 pm
content: Thanks for the tips folks. I'll check for shorts.

author: edavid
author_rank: Super Contributor
timestamp: October 10, 2013, 05:00:22 pm
content: Quote from: bottlegardener on October 10, 2013, 02:14:06 pmNo, not a common failure mode.Doesn't sound particularly like a shorted cap, but it's possible.The plugins are probably OK, but you're only talking $60 worth of plugins there anyway.As long as the CRT is good, it's definitely worth repairing. It doesn't sound like you need the 7104's MCP CRT for anything, so you could probably trade your broken 7104 for a working mainframe of a different model.
LCR meter test leads length - Page 1
Forum section: electronics / testgear

author: owiecc
author_rank: Frequent Contributor
timestamp: October 10, 2013, 03:13:23 pm
content: We have a HP4284A 20Hz-1MHz LCR meter with alligator clip leads box at the university. Cable length is 1m and the in the instrument there is an option to select approperiate cable length (1m, 2m and 4m). Recently one of the cables broke close to the alligator clips. I need to shorten the leads by ca 4cm to fix this. How big impact can this have on the accuracy? How is cable length compensation performed by this instrument?
Used Signal Generator HP 8656 or Equivalent? - Page 1
Forum section: electronics / testgear

author: Bryan
author_rank: Frequent Contributor
timestamp: October 09, 2013, 08:11:14 pm
content: Hello:Looking for a good used basic signal generator. Looking at something like a HP 8656. . Anything better in the same price range and features.

author: eurofox
author_rank: Unknown
timestamp: October 09, 2013, 08:37:30 pm
content: Quote from: Bryan on October 09, 2013, 08:11:14 pmI got one like that:http://www.rf-consultant.com/calibrated-signal-generator/eurofox

author: orin
author_rank: Frequent Contributor
timestamp: October 10, 2013, 01:58:37 am
content: Quote from: Bryan on October 09, 2013, 08:11:14 pmWhere are you? I have a Wavetek 2500 available in the Seattle area. 400kHz to 1100MHz. Passes every test I can throw at it which is pretty much everything but the modulation distortion tests. Spec-wise, I suspect it's similar to the 8656, but I've not compared them in detail.$220 (paypal) plus shipping to forum members.Orin.
Amprobe AM-270 Digital Multimeter won't switch on - Page 1
Forum section: electronics / testgear

author: eeshock
author_rank: Contributor
timestamp: October 13, 2013, 05:59:23 am
content: Hi, I bought this multimeter less than 1 year ago. It was working fine but a few days ago I blown the mA fuse. So mA range won't work. That's fine and the Voltage and Amp range still works.Today I opened the case and removed the blown fuse. But after I assemble the case back, the meter won't switch on. It couldn't be the battery since yesterday it was still working. And I've changed a new battery and it still won't switch on.I don't think I've done something silly to cause further damage. And I carefully checked the components and can't see any visual damages. So it is very strange that my opening the case destroyed the whole meter!It also can't be the blown fuse, because I tried to short the mA fuse and it still won't switch on.I'm very frastrated now. Is it a common issue? What are the likely cause of it not switching on? Thanks.

author: Lightages
author_rank: Unknown
timestamp: October 13, 2013, 06:03:39 am
content: Is it possible that you reassembled the case with the range switch in the wrong position?

author: iloveelectronics
author_rank: Frequent Contributor
timestamp: October 13, 2013, 06:11:47 am
content: Quote from: Lightages on October 13, 2013, 06:03:39 amThat's a very good guess. I know I have done that before

author: eeshock
author_rank: Contributor
timestamp: October 14, 2013, 12:31:09 am
content: Umm, never thought of this. Is it possible?I remember I turned the dial from one end to the other end and the screen is always blank. And the dial just stops at the exact OFF location where it should and can't go further. I'll reopen it to try again tonight.

author: eeshock
author_rank: Contributor
timestamp: October 15, 2013, 08:32:46 am
content: You guys are absolute right! I think I now have an IQ of zero.I did indeed install the switch in the opposite position. It just was designed to turn exactly 180 degrees, so after I put the case back, the dial clicks in each position as before, and it also stops at the 2 OFF positions. If they add or remove on click it would be noticed immediately.The Amprobe has a quality design and used quality components, better than some other cheap brands. I was so frustrated to think all these quality components gonna be wasted if the meter is dead. Now it's good relief.

author: Lightages
author_rank: Unknown
timestamp: October 15, 2013, 05:47:23 pm
content: I am happy the problem is resolved.
Fluke CNX3000 software  - Page 1
Forum section: electronics / testgear

author: MITTS
author_rank: Contributor
timestamp: October 09, 2013, 06:15:52 pm
content: I called about the CNX today and was asking about the capabilities of the software. The cnx program can not do what I was asking about but he was saying the Fluke View Forms could and was told it was comparable with the CNX for things like live graphing and being able to view multiple inputs on the same graph. When I looked on line cnx was not listed for use with Fluke Forms View.Anyone know what the story is with this?
Mastech MS5908 Circuit Analyzer Experience? - Page 1
Forum section: electronics / testgear

author: UPI
author_rank: Regular Contributor
timestamp: October 15, 2013, 05:16:34 pm
content: I need a relatively inexpensive and easy method to monitor voltage and earth ground leakage on some equipment power supplies. This is to make sure the supplies do not have poor connections on the voltages or earth ground. Does anyone have experience with the Mastech MS5908A?http://www.amazon.com/NEEWER%C2%AE-Voltage-Circuit-Analyzer-MS5908A/dp/B00CPZW16YMy power supplies have an auxiliary 120V outlet where this Mastech could be attached. I would want to monitor Min/Max voltage and Min/Max leakage to earth ground over several hours. The manual is not very clear as to whether it has Min/Max storage of readings.http://www.aidetek.com/New_products_info/Datasheet/huayi/MS5908_english_manual.pdfI know this can be done with two cheap min/max multimeters, but an all in one device is preferred.Any input or suggestions would be appreciated.
Thoughts on Siglent SDS1102CNL - Page 1
Forum section: electronics / testgear

author: echen1024
author_rank: Super Contributor
timestamp: July 19, 2013, 10:10:01 pm
content: After narrowing my oscilloscope search down, someone on ebay has offered me the 100MHz 2 ch Siglent SDS1102CNL scope for $320. Does anyone have this oscilloscope, or has any experience with siglent products? Thanks.

author: kizzap
author_rank: Unknown
timestamp: July 20, 2013, 12:57:48 am
content: I was looking at the Siglent scopes for a while, however I recently decided that I should just bite the bullet and get the Rigol DS2072. Reasons being:Higher sample rate (2GSa/s vs 1GSa/sLarger memory depth(14Mpts standard vs 2Mpts Max depending on the model)Bigger screen (8" vs 7")Newer designMore user support on these forumsAnd most importantly is that members on this forum are actively working at being able to hack the thing to get the best performance out of the machine as possible, because it seems that all the models are the exact same design, and are just locked in firmware.That's my 2 cents...-kizzapEdit: also looking at the specs, be careful if you do want to go the Siglent route, be careful on the product models: the CNL only has a memory depth of 40kpts, while the CML (for only ~$45 more) has 2Mpts (seemingly the maximum memory of those Models.) I still say, save up your pennies, and get the Rigol DS2072 and it should last you a long time.

author: roberto.pietrafesa
author_rank: Newbie
timestamp: October 09, 2013, 02:49:04 pm
content: Kizzap, probably you are correct about better performances, but you have to take a look it costs x3 TIMES!SIGLENT 1102CNL €255 todayRIGOL DS2072 €890 today.At these conditions, sincerely I think that Siglent has a more efficient (Functions&Specs)/(Cost) ratio!Thank you all!Roberto.

author: mos6502
author_rank: Frequent Contributor
timestamp: October 09, 2013, 04:13:56 pm
content: First of all, make sure you buy it from a reputable dealer, who will give you your money back if its broken, because the SDS1072CML I bought was defective. So they might have quality control issues.I've used it for a bit ... honestly, I wasn't impressed. The UI is slow as hell. When you turn the knob, it takes a second for the waveform to move.The screen isn't great either. The resolution is quite low (480x234 pixels) and the viewing angles aren't very good either.It does have all the functions you'd expect, and they seemed to work without obvious bugs, so if you really can't afford anything else, yeah, you'll probably get a useable scope (if it works). But I'd highly recommend saving your money, and going for a better one.
Best Electrcial circuit tracer for AC voltage - Page 1
Forum section: electronics / testgear

author: DavidTubber
author_rank: Newbie
timestamp: October 09, 2013, 04:19:11 pm
content: Hi.Im a commerical building engineer trying to find a good circuit tracer. Can you help me out? ill be using it for under 500 volts. would like to use on hot circuts. Would like to trace open circuits if possible thanks. DavidTubber

author: andtfoot
author_rank: Unknown
timestamp: October 09, 2013, 05:37:18 pm
content: It's probably expensive, but the Fluke 2042 may do the trick.http://www.fluke.com/fluke/auen/electrical-testers/Electrical-Testers/Fluke-2042.htm?PID=56052It appears to let you use it on live circuits up to 400V

author: commongrounder
author_rank: Frequent Contributor
timestamp: October 09, 2013, 06:29:59 pm
content: Check out Pasar-Amprobe AT-2000 or AT-4000 series tracers. They work on live lines up to 600 volts, with a line powered transmitter, as well as dead/open circuits with a battery powered transmitter. Ideal also makes a similar device in their Suretest line. I own the AT-2004 and it works incredibly well, with great reach. Best of luck.
Local Auction has tons of old equipment for sale!? - Page 1
Forum section: electronics / testgear

author: samsmock
author_rank: Newbie
timestamp: October 06, 2013, 02:59:12 pm
content: I live in Kansas US. There is a local company that auctions off government assets.Anyhow, a technical school about an hour drive from me has put a ton of old test equipment up for auction. The problem is, it's a late addition and it sells this tues, oct 8.There are bulk deals on HP, Techtronix, Scopes, power supllies, signal generators.If somehow people could arrange to get things purchased, I could somehow work out picking them up and shipping them, perhaps in turn for some of the goodies. A lot of it probably isn't worth messing with, but for hobbyists there is a lot of fun stuff.Here are some examples.http://www.purplewave.com/cgi-bin/mnlist.cgi?131008/AD9094/5http://www.purplewave.com/cgi-bin/mnlist.cgi?131008/AD9106/showallhttp://www.purplewave.com/cgi-bin/mnlist.cgi?131008/AD9102http://www.purplewave.com/cgi-bin/mnlist.cgi?131008/AD9113I guess, post here about arranging things if anyone is interested. I'm not sure what I'd be getting myself into, but let's see what people may think is worthwhile.

author: Seg
author_rank: Regular Contributor
timestamp: October 09, 2013, 03:37:54 am
content: Might be a sweet deal on some Fluke 8842A there. The rest looks a bit old.

author: GeoffS
author_rank: Unknown
timestamp: October 09, 2013, 03:53:23 am
content: All examples marked as sold.

author: casinada
author_rank: Frequent Contributor
timestamp: October 09, 2013, 05:51:32 am
content: Somebody got scopes for less than $100All those Tektronix 7000 series plugins for almost nothing.
Filter selection Spectrum Analyser FFT - Page 1
Forum section: electronics / testgear

author: ramjet1953
author_rank: Newbie
timestamp: October 07, 2013, 04:35:21 am
content: I wonder if Dave can give us a lecture on filter selection when using FFT with a spectrum analyser?My virtual oscilloscope/spectrum analyser has a confusing list of selections.Rectangle, Bartlett, Triangular, Cosine, Hanning, Bartlett-Hanning, Hamming, Blackman, Blackman-Harris etc. ad nauseum.I looked around, but have yet to find an article detailing selection criteria.It would be great to know which filter is the best choice for different situations.Regards,Roger

author: olepr01@gmail.com
author_rank: Contributor
timestamp: October 07, 2013, 08:22:39 am
content: That would be the window-function applied prior to performing the FFT, not a "filter" as such;http://en.wikipedia.org/wiki/Window_function, alsohttp://www.ni.com/white-paper/4844/en/

author: MarkL
author_rank: Unknown
timestamp: October 09, 2013, 01:06:16 am
content: Although somewhat specific to Tek equipment, this paper has some good general info about the commonly implemented FFT window types:http://www.tek.com/document/application-note/fft-applications-tdsAlso from Tektronix, in the TDS3xxx FFT user manual, is a simple chart that summarizes situations where you would select one window type over another (page 12/13):http://www.tequipment.net/pdf/tektronix/TDS3FFT_UserManual.pdf(Just to be clear, the various window types apply to anyone's implementation, not just Tektronix...)

author: w2aew
author_rank: Super Contributor
timestamp: October 09, 2013, 01:29:10 am
content: My friend Ian wrote a short blog on the topic of these window functions.http://www.tek.com/blog/window-functions-spectrum-analyzers

author: ramjet1953
author_rank: Newbie
timestamp: October 09, 2013, 01:37:06 am
content: Hi, Guys!Thanks for the replies and links.After reading all of the links, I feel a lot more confident which flavour to choose.Regards,Roger
Why are there no relays in TDS2000 scopes? - Page 1
Forum section: electronics / testgear

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 08, 2013, 09:30:34 pm
content: I wonder why there are no relays in TDS2000 and probably TDS1000 or TBS1000 scopes.How are the ranges switched?Why do other manufacturers use mechanical relays when Tektronix doesn't? Tektronix must be using some optocouplers or something.

author: c4757p
author_rank: Super Contributor
timestamp: October 08, 2013, 09:33:22 pm
content: If I remember correctly, somebody else asked that a while ago and free_electron said they use FETs for the switching.

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 08, 2013, 09:33:58 pm
content: In most digital oscilloscopes (Agilent, Owon, Rigol, GW Instek,) you hear the mechanical relays clicking.

author: c4757p
author_rank: Super Contributor
timestamp: October 08, 2013, 09:35:19 pm
content: Yeah, I know, I mean specifically in this oscilloscope.

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 08, 2013, 09:36:36 pm
content: Quote from: c4757p on October 08, 2013, 09:33:22 pmWell, I could not find that thread. Are the FETs those K300 and K350 here?http://youtu.be/3K04bHJJQQA?t=15m37s

author: c4757p
author_rank: Super Contributor
timestamp: October 08, 2013, 09:38:13 pm
content: I would assume so, since K is usually used for a relay, and I think I remember a little discussion about them.Hmm... I can't find the thread either.

author: Hydrawerk
author_rank: Super Contributor
timestamp: October 08, 2013, 11:10:40 pm
content: Why do most manufacturers use mechnaical relays instead? Are they better for middle-class oscilloscopes.What is cheaper? FET or a relay? Well, maybe Tektronix has a special patent on this, while others use relays instead.
Info on Tektronix TLA613 - Page 1
Forum section: electronics / testgear

author: vaualbus
author_rank: Frequent Contributor
timestamp: October 08, 2013, 09:13:54 pm
content: Ye guys last time I post an information about a logic analyzer a good discussion took placed. That time was about the HP16000 logic analyzer. This time I asked the Tektronix TLA613 is a good logic analyzer? What is the max price you would paid for this instrument on ebay? The instrument Is great? If not what do you suggested?Best regards, Alberto Vaudagna.