hybridfree/eevblog-posts huggingface dataset:
Signal Generator on MSO2202A - Page 1
Forum section: electronics / testgear

author: whalphen
author_rank: Regular Contributor
timestamp: July 26, 2016, 12:41:28 pm
content: I've narrowed my selection of a scope to the Rigol MSO2202A or the MSO2202A-S. The -S model has the signal source. I'm still trying to decide if the -S is worth the extra cost. Can anyone tell me if the signal generator can provide sweep output?

author: whalphen
author_rank: Regular Contributor
timestamp: August 03, 2016, 03:09:11 pm
content: I've done some more investigation on this question. It appears that the signal source can be setup to sweep frequencies by using the FM option and setting the deviation to cover the range of interest.

author: nugglix
author_rank: Regular Contributor
timestamp: August 04, 2016, 03:20:52 pm
content: Hi!As a MSO2102A-S owner I can't recommend the -S option.Onyl if you really need everything in one device or have extremely limited spacethis option would make sense.The poor man's sweep is possible, but the usefulness depends on what frequenciesyou want to work. The usability isn't the best too. The manual can't show that indetail, but if you need to change values often it's starts to become a pain.Save the money and a little more and get a real 2 channel sig-gen.You'll probably buy it anyway in the future (I did).CheersGuido

author: CustomEngineerer
author_rank: Frequent Contributor
timestamp: August 04, 2016, 10:40:53 pm
content: As a DS2072A-S owner, I completely agree with everything nugglix said. I ended up getting a real generator less than a year after getting the scope because I was tired of having to keep switching between controlling the scope or the builtin generator. Even one of the cheap FeelTech signal generators would be better than using the built one.Edit: The only times I would recommend getting the builtin generator is if you don't have the space on your bench for a separate generator, or you need an all-in-one instrument to take onsite somewhere else.
Owon ODP 3032 won't respond to commands - Page 1
Forum section: electronics / testgear

author: VE2GYA
author_rank: Newbie
timestamp: August 05, 2016, 07:28:35 pm
content: Hi there,My Owon ODP3032 decided to not respond to keys after startup. Worked fine up until a few weeks ago. Now when it asks to "press any key to enter" I do, the screen pops up, but nothing else works. I cannot enable any function, nor turn either channel on. I unplugged it for awhile, but no difference. No COM or USB connected, nor any devices to be powered. Please advise troubleshooting process. I tried using the digital power software to run it, no go. Looked for new firmware, says it has the latest. Kinda running out of options from my limited palette. Anybody else have this issue? Perhaps a "secret" keystroke hold on powerup to reset the brain?David
Cheap DIY Fiber Optic Isolated Voltage Probe with bandwidth up to 70 MHz - Page 1
Forum section: electronics / testgear

author: pascal_sweden
author_rank: Super Contributor
timestamp: August 02, 2016, 11:10:15 pm
content: I stumbled on this Hackaday.io project:https://hackaday.io/project/12231-fiber-optic-isolated-voltage-probeThe core of the DIY probe are the IF-E91D and IF-D91 plastic optical fiber transmitter and receiver. They're about $6/each and the data-sheet says they can be used to make a 70 Mhz analog link.Maybe if you use a slightly more expensive plastic optical fiber transmitter and receiver, you can make a very cheap isolated probe that can reach a bandwidth up to 200 MHz!I plan to share this link with my contact at Pintek!
Fluke 561 IR thermometer query - Page 1
Forum section: electronics / testgear

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: July 30, 2016, 09:25:03 am
content: Hi,I have just acquired a Fluke 561 IR thermometer. It appears to work correctly but I notice in the user manual that it suggests 'cleaning the lens with a soft cloth...' It appears that my unit does not have a 'lens' in the outer end of the 20mm hole although there is possibly a witness mark suggesting that something may once have been there. I cannot find a picture of the business end. There is a thin aluminium ring at this point.Does anyone have a Fluke 561 to hand, and can they confirm whether there is a 'lens' present. Also, is it a convex type lens or just a plain window to stop dirt and fingers going down the hole to the sensor.I have not had chance to determine if the 'spot size at distance' that the thermometer looks at (as detailed on the top of the unit) is correct, and haven't thought of a method to do this test.Regards, BT

author: Assafl
author_rank: Frequent Contributor
timestamp: July 30, 2016, 01:26:03 pm
content: I used to own a 561 and in those days it had a metal ring but no outside lens.I assume the manyal meant the lens inside the hole (using a swab). But I never cleaned mine...

author: BurningTantalum
author_rank: Frequent Contributor
timestamp: July 31, 2016, 05:12:57 am
content: OK, thanks for that... unless your lens had fallen out too !I haven't used it in anger yet but will see how I go with it.Regards, BT

author: Assafl
author_rank: Frequent Contributor
timestamp: July 31, 2016, 05:42:16 am
content: Not really. It came in a blister pack so the lens couldn't have fallen out.
3 phase power analysis (Troubleshooting VFD issues) - Page 1
Forum section: electronics / testgear

author: andrewwong2000
author_rank: Contributor
timestamp: August 01, 2016, 01:45:32 pm
content: I've recently set up a new Lenze SMV 4kw 3phase VFD to run a 3kW 3 phase motor, but have an intermittent "input phase loss" issue.Really annoying if you want to run the motor for any length of time!I'm stumped to figure out how to solve it, and am not sure if it's my VFD, the supply, between the vfd and the mains. My direct start3 phase machinery works fine but the VFD is not totally reliable.So the engineer in me says I need to really understand what's going on with the power and see if I am really losing a phase, or if it's the front end of the VFD.. or the mains supply.As I'm planning to buy another VFD for a future CNC project, I'm thinking about buying a 3 phase analyzer to sort this out once (and for all). Do the cheaper $1500 EBay taiwan/chinese 3 phase analysers do a reasonable job of detecting dips/swells, phase, PF issues or should I be going to something more expensive ?
programming a R&S AFGU AWG - Page 1
Forum section: electronics / testgear

author: PA4TIM
author_rank: Super Contributor
timestamp: January 26, 2014, 12:23:24 pm
content: I have this R&S function generator and a pdf from the manual. It is possible to program waveforms from the keyboard. I have no GPIB interface. Not that I need that function a lot but now and then it coould be handy to make a custom waveform..More info:http://www.pa4tim.nl/?p=2417Does any body have experience with programming waveforms for this beast and enlight me, because it is very complicated or I'm just to stupid for it(I'm better in repairing analog electronics as in operating digital menu driven ones)

author: PA4TIM
author_rank: Super Contributor
timestamp: August 03, 2016, 08:49:38 am
content: After reading a part of a topic about programming a Chinese AFG I was triggered to search info about programming mine and so I found this topic, to bad it turned out to be mine with no responses.But regular looking for documentation you could not find in the past, is often useful because more and more doc gets online over time.It is still going strong, it is a truly wonderful instrument with great performance but there is one big disadvantage with this kind of kit. Nobody seems to have problems with it so it is hard to find info on forums. That is the advantage of Chinese gear, they have so much problems that, after a while, they all are documented into great detail on forums.

author: azer
author_rank: Regular Contributor
timestamp: August 03, 2016, 05:32:11 pm
content: Maybe they made it intentionally difficult so you would buy the Arbitrary Waveform Designer software (AWD-K1)

author: blackbird
author_rank: Regular Contributor
timestamp: August 03, 2016, 05:41:10 pm
content: To bad my AFG is without the U so I can't help you, helaas.
How to buy a scope locally? - Page 1
Forum section: electronics / testgear

author: iXod
author_rank: Frequent Contributor
timestamp: July 29, 2016, 05:43:00 am
content: I found a portable Tek scope on local CraigsList. What should I take with me to test it?I guess I'll want a freq. generator up to the advertised bandwidth of the scope. And to test the input attenuation, a DC power supply?What would you take? I'm pretty sure there's no warranty with such a purchase...Thanks.

author: BMack
author_rank: Regular Contributor
timestamp: July 29, 2016, 06:43:26 am
content: Frequency generator definitely. I don't know how easy they are to find but I found a NOS one at my shop, a Tektronix Scope Evaluation Board, it's powered by a 9v battery and generates different tough-to-read signals. Upon research, they were made in the 80s(me too!). I imagine they'd be really cheap if you can find one.

author: TheSteve
author_rank: Unknown
timestamp: July 29, 2016, 06:45:12 am
content: Which model is it? The TDS7xx series can be reasonably well tested using the probe compensation output.
Need help with Rigol DS2202 - Page 1
Forum section: electronics / testgear

author: rcorwin3
author_rank: Newbie
timestamp: July 28, 2016, 11:34:41 pm
content: Hello All,I hope I am asking these questions in the right forum....I just recieved an used Rigol DS2202 for 600.00 US off of evilbay.. I felt it was a pretty good price?Anyway, it is missing the intensity knob which I didn't notice. I have been searching and I cannot even find a hint to one. Does anyone know of a source for this part or have a junk one they can sell to me?The other issue I need to ask your opinion and wisdom on about this scope is that it came with the official version. Instead of 300M bandwidth it is 200M. Also the hardware version is 1.0 and the software version is 00.01.01. Is it worth trying to upgrade? I am not really concerned about the bandwidth but about some of the other features that may need upgrading.Thank you all very much as I am still pretty new to all of this!My best,rik

author: rcorwin3
author_rank: Newbie
timestamp: July 29, 2016, 01:54:56 am
content: Sorry guys.... I am old and tired but it is a Rigol DS2102....Thank yourik

author: CustomEngineerer
author_rank: Frequent Contributor
timestamp: July 29, 2016, 02:32:20 am
content: Is it a DS2102 or DS2102A? But yes, would definitely recommend upgrading the firmware either way, 00.01.01 is a very old version. Rigol has fixed quite a few bugs and introduced several new features in the newer firmwares. I would definitely recommend installing the latest version, 00.03.04SP2 (full version number is 00.03.04.02.01). If its the non A version I believe it can only be hacked to the 2202 version (200 MHz), but the A models can be hacked to the full 2302 (300 MHz). Either way you should be able to also enable all extra features at the same time.
Philips PM3340 2Ghz Digital Scope - Page 1
Forum section: electronics / testgear

author: GasperSB
author_rank: Newbie
timestamp: July 14, 2016, 12:03:27 pm
content: Hi!I got my hands on Philips PM3340 2Ghz Digital Scop, but the inputs are not working. So I was wandering if anyone has found the schematic for the whole analog part of the osciloscope(i would be setesfied just with the input part of the schematic).I bought a manual that was described as the service manual for this scope but in the end it turned out to be just for the IEEE-488 and rs232 interface of the scope.Best regards,Gasper

author: Emo
author_rank: Regular Contributor
timestamp: July 14, 2016, 05:30:31 pm
content: Hi Gasper,Did you see the other thread already, I have part of the imput circuitry already inhttps://www.eevblog.com/forum/testgear/philips-pm3340-goodbad/msg836448/#msg836448I am currently not in the vicinity of my files, drop me a PM if you need more infoRegards,Eric

author: Emo
author_rank: Regular Contributor
timestamp: July 15, 2016, 02:07:34 pm
content: Hi Gasper,In my case I just in time discovered that all 10uF capacitors on the input(and sync) amplifiers were dried out and dead. The scope uses a sample system on the analog input that can be verified by looking for a repetitive signal on the switching diodes. The main processor can be verified by hitting the green auto button.Eric

author: tautech
author_rank: Super Contributor
timestamp: July 15, 2016, 08:35:13 pm
content: This User manual with 239 pages might have schematics....not checked.http://www.download-service-manuals.com/en/model.php?id=122628.47 Mb

author: Emo
author_rank: Regular Contributor
timestamp: July 30, 2016, 01:58:38 pm
content: For those interested, I just uploaded the full service manual to KO4BB. In some days it will be included in the manuals section.(size approx 8.5 Mb)Regards,EricPS. If needed earlier give me a pm
Setting LeCroy 9300 Series Thermal Printer Darkness? - Page 1
Forum section: electronics / testgear

author: RCHRDM
author_rank: Regular Contributor
timestamp: July 25, 2016, 10:59:25 pm
content: The 9300 series LeCroy oscilloscopes came with an optional thermal printer. The LeCroy part number is 9300-7.Does anyone know of a way to adjust the image (darker) on this printer?I have not come across any options in the scope software to do this.Does it depend on the type of paper used?Richard

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: July 26, 2016, 08:08:32 am
content: Not sure on the 9300 Series but if I remember right (my WavePro has a printer but I've never used it) there's an intensity control knob under the printer cover.As to the scope's menu, there isn't to control the printer other than selecting it as output.

author: RCHRDM
author_rank: Regular Contributor
timestamp: July 26, 2016, 06:52:59 pm
content: Thanks.If I lift up the cover over the printer (where the roll of paper is), I see a lever that I assume helps to install the paper and a button to advance the paper, but no other control.Richard

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: July 27, 2016, 05:19:58 am
content: You're right. I checked again last night and the printer in my WavePro doesn't have a brightness control either. I've seen printers that have it but it might have been in other equipment. I guess there's no obvious way to control brightness then, at least in non-disassembled condition (I'd guess it still has some way to set the print intensity internally).

author: RCHRDM
author_rank: Regular Contributor
timestamp: July 27, 2016, 06:44:46 pm
content: Thanks.I have the scope apart ready for a replacement front panel, etc. I took the printer circuit board off, but did not see any trimmers or adjustments.I guess what you see is what you get!Maybe different papers...It basically works OK though.Richard

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: July 28, 2016, 05:24:49 am
content: Well, at the end of the day, it's a black and white (single bit, i.e. not even grayscale) printer, so I guess its manufacturer didn't believe any brightness control was required.I've seen a lot of LeCroy scopes with printers but I've never seen someone actually using it. Usually the only interaction with it comes, after years of non-use when some caps on the printer board have dried out and prevent the scope from booting, in the form of opening the scope and disconnecting the printer.

author: robert_
author_rank: Regular Contributor
timestamp: July 28, 2016, 05:36:31 pm
content: If these printers have poor contrast, usually its caused by the paper (or a dirty printhead).The old paper has aged way beyond its intended life and as such, has become insensitive, and recently made paper is intended for different printheads (usually much hotter, especially for high speed POS reciept printers), so unfortunately its really hard to find anything that works well. If there were some adjustment to increase printhead drive (or increasing its supply voltage) it might help, but it also might burn out the head.
Siglent Products Discontinued in Tequipment, WHY! - Page 1
Forum section: electronics / testgear

author: nour
author_rank: Frequent Contributor
timestamp: July 27, 2016, 11:24:46 am
content: I have finally decided about getting the SDG2024x from Siglent and went to Tequipment.net and found they have discontinued the productActually they have discontinued all Siglent products !!I am not a big fan of Siglent product anyway but why!!And where can I have this model as cheep as possible? I am still going to ship it internationally so any suggestions ?

author: tautech
author_rank: Super Contributor
timestamp: July 27, 2016, 11:32:16 am
content: For some reason Saelig are how handling Siglent products, since a few months ago.They do however offer EEVblog member discounts and you can ask for the code in this thread:https://www.eevblog.com/forum/testgear/equipment-discounts-from-saelig/There are some package deals on these models so be sure to ask.

author: FuzzyOnion
author_rank: Contributor
timestamp: July 28, 2016, 06:35:52 am
content: Circuit Specialists in Arizona also handles Siglent if Saelig doesn't work out for you.
Tek MSO 2024 bandwidth? - Page 1
Forum section: electronics / testgear

author: iXod
author_rank: Frequent Contributor
timestamp: July 27, 2016, 03:55:08 pm
content: Datasheet for this scope:http://www.tek.com/sites/tek.com/files/media/media/resources/MSO2000B-DPO2000B-Mixed-Signal-Oscilloscope-Datasheet-3GW284137.pdfScroll about halfway down, under "Specifications" (under both Model Overview and Vertical System Analog Channels) it states that the hardware is limited to 20 MHz for all models.How can this scope function at (for example) 200 MHz with 20 MHz input circuitry? I don't get it.Thanks.

author: Kilrah
author_rank: Unknown
timestamp: July 27, 2016, 04:01:24 pm
content: What it says exactly is "Hardware bandwidth limits - 20 MHz" which just mean that each channel has a 20MHz bandwidth limiter you can enable or not, like most scopes.

author: iXod
author_rank: Frequent Contributor
timestamp: July 27, 2016, 04:07:18 pm
content: Quote from: Kilrah on July 27, 2016, 04:01:24 pmAh, a bw limit switch.Thanks.
R&S CMU200 SA below 10 MHz - Page 1
Forum section: electronics / testgear

author: cio74
author_rank: Regular Contributor
timestamp: June 19, 2016, 05:23:29 pm
content: Hello,I read some users around here have got this unit, do you know if it's possible to have the spectrum analyser working below 10MHz? Same question about the power meter.The idea is to get one of such unit and use it for ham radio stuff and that will require frequency below 10MHz.Thanks.cio

author: _Wim_
author_rank: Super Contributor
timestamp: June 19, 2016, 09:12:40 pm
content: I do not think this is possible, but I am for sure also no expert on this unit. More than half of it functions I do not even understand...

author: Brainbox
author_rank: Contributor
timestamp: July 26, 2016, 11:13:35 am
content: The CMU200 does not analyze frequencies below 10 MHz.For this reason I am using an Up-converter which lift the input by 10 MHz.I got this converter from a colleague but the design is somewhat old en not very stable.Currently I am working to design a new converter with an input range from 0-50 MHz which will give an output from 10-60MHz.The base is an 10 MHz Trimble OCXO which I purchased on EBay.Further some high and lowpass filters a mixer and gain stage.If somebody is interested in this project or have some suggestions, let me know.
Metrotest MIC 3700 Multimeter - Page 1
Forum section: electronics / testgear

author: NottheDan
author_rank: Frequent Contributor
timestamp: July 25, 2016, 08:34:55 pm
content: Does anyone know this one? Found it in a boot sale at the weekend and Google can't tell me anything worthwhile about it.

author: Hydrawerk
author_rank: Super Contributor
timestamp: July 25, 2016, 08:53:03 pm
content: This?

author: NottheDan
author_rank: Frequent Contributor
timestamp: July 25, 2016, 09:46:56 pm
content: That's the one. Mine doesn't have the raised edge around the soft buttons, just an area of slightly smoother plastic, but otherwise it looks the same.
Diagnosing display problem Agilent 6633B - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: July 22, 2016, 07:50:56 pm
content: Perhaps someone can offer some insight or suggestions on this problem:The unit powers-up (fan running), but no display.This power supply is similar in many ways to the various HP/Agilent 66xxx series power supplies of this era in that it has:(A1) main power supply board(A2) interface board with the GPIB, uC etc(A3) display boardFirst observation was a burnt Tantalum capacitor on the A2 board, the capacitor appears to be decoupling for the incoming +15V power supply from the A1 board (it also has a companion -15V), I'm pretty sure these are used for the analog circuits on the A2 board. I replaced this capacitor and powered up hoping for a quick fix, the new capacitor quickly overheated, so I suspected possibly reverse polarity or over-voltage on this rail. I disconnected the now shorted (new) cap and connected a programmable crowbar set for 16V and an isolated scope. With the display disconnected the +15V rail looks just fine, no overvoltage or negative voltage, just a nice clean +15V. HmmmmmWith the front panel disconnected the +5V power rail for the display also looks good (at the 8 pin connector to the disconnected display), however with the display connected the +15V rail only comes up to about 1V or so, and the +5V display rail is just millivolts, note these two power supplies are supposedly isolated (according to the manual), the +5V is for the frame referenced A2 board and display, while the +/-15V is referenced to the A1 power supply output section and appears to be used for A/D's and opamps on the power supply "side" of the A2 board.So I suspect that the display board is somehow pulling down the supplies from the A1 board, so I try powering the display board in isolation with a bench supply, it does not display anything and pulls about 130ma@5V.Details of the display board as well as the interface between the display and A2 boards is not included in the 6633B service manual however the interface appears to be identical to one I found in a 66309D manual, at least the 3 ground pins and the 3 +5V power pins use the same pin-out, leaving two pins on the 8 pin header that are likely for i2C or similar interface between the (A3) display and (A2) uC.Would really help if I had the schematic for the display board.So for some unknown reason connecting the display causes both the +5V as well as the +15V analog power supplies to collapse, yet powering the display in isolation only pulls moderate current.Thoughts and suggestions are welcomeAttached:image from 6633B and 66309D service manuals, page 25 of the 6633B manual is interesting, the top of the flow chart is to check +5V at A3J2-8, this appears to be J111-8 in the 66309 service manual image also attached.

author: Jester
author_rank: Frequent Contributor
timestamp: July 24, 2016, 09:04:14 pm
content: I figured it out, the previous owner attempted a repair and connected one of the cables to the wrong header.
Tektronix TDS1002 7853-01 ASIC replacement? - Page 1
Forum section: electronics / testgear

author: memset
author_rank: Regular Contributor
timestamp: July 22, 2016, 08:53:07 pm
content: Hello!Does anyone know, is it possible to replace 7853-01 ADC ASIC in TDS1002 with newer 9858-00 ASIC for TDS1000C series?156-7853-01 is not possible to find, but 9858-00 looks to be available on aliexpress (if its real at all):http://ru.aliexpress.com/item/9858-00/32395060587.html

author: memset
author_rank: Regular Contributor
timestamp: July 24, 2016, 01:05:56 pm
content: I wonder if that lot on Ali is a Tek's part at all
DS1000Z Plus - Page 1
Forum section: electronics / testgear

author: Kappes Buur
author_rank: Regular Contributor
timestamp: July 24, 2016, 02:57:21 am
content: This may be of interest to some, I had not seen this mentioned beforeDS1000Z_Plus"_now_field_upgradable_to_MSO

author: ebastler
author_rank: Super Contributor
timestamp: July 24, 2016, 07:52:55 am
content: This has been discussed here before:https://www.eevblog.com/forum/testgear/new-rigol-ds1000z-plus-models-ds-models-which-are-mso-field-upgradable/If I recall correctly, these are not as easily hackable as the regular DS1000Z scopes, but the more complex procedure for the MSO1000Z series applies:https://www.eevblog.com/forum/testgear/you-can't-unlock-a-mso1000z-series-scope-without-a-memory-dump-and-other-lessons/
Rigol DS1054Z unlock - Page 1
Forum section: electronics / testgear

author: paddyred
author_rank: Newbie
timestamp: April 25, 2016, 08:09:59 pm
content: Hi guys,I apreciate this topic has been done to death but I was hoping for a more recent update. Does Riglol still work on the latest version of the v04.01 firmware? Also if it isn't a good code what happens? apparently it locks you out?

author: ytterligare
author_rank: Regular Contributor
timestamp: April 25, 2016, 09:01:55 pm
content: Quote from: paddyred on April 25, 2016, 08:09:59 pmHi Paddyred, as I said, mine arrived last week, with firmware 4.03.SP2, and riglol did his duty, no sweat.Hope it helps.

author: paddyred
author_rank: Newbie
timestamp: April 25, 2016, 09:27:44 pm
content: Thanks for that! Hopefully mine has the SP2. Is there a newer version? I have just ordered mine from direct from rigol

author: paddyred
author_rank: Newbie
timestamp: April 25, 2016, 09:58:54 pm
content: Also, what code did you use? Was it DSFR as I keep seeing DSER as the working one. Have you used your 500uV vertical too? Apparently it doesn't work on the 1054z but if it didn't work why put the software there in the first place!

author: Marcos
author_rank: Contributor
timestamp: April 25, 2016, 10:10:27 pm
content: Pray not to have the latest firmware release. Read forum about it.The good code is DSER.

author: Athanasis
author_rank: Contributor
timestamp: June 09, 2016, 11:30:06 am
content: Quote from: Marcos on April 25, 2016, 10:10:27 pmIs there any newer release than 4.03.SP2 ?Also which is the best unlock method to date? Any light there?

author: nanofrog
author_rank: Super Contributor
timestamp: June 09, 2016, 12:59:10 pm
content: Quote from: Athanasis on June 09, 2016, 11:30:06 amNo, not yet.Quote from: Athanasis on June 09, 2016, 11:30:06 amHasn't changed; go to theRiglol 1.03dwebsite, enter your unit's S/N, and the codeDSERin theOptionsfield (leavePrivatekeyblank), then hit theGeneratebutton. A small window pops up with your unlock code.At this point, RTFM on how you enter this code and do so. Then reboot IIRC, and you're done.Don't sweat over this, it's very easy to do.

author: Dawid
author_rank: Contributor
timestamp: July 28, 2016, 08:35:04 pm
content: Hey,I just bought DS1054Z and my firmware is: 00.04.04, board: 0.1.4I assume it is the latest (am I right?)Hacked succesfully.
Need help on Digital Oscilloscope Chart - Page 1
Forum section: electronics / testgear

author: fanOfeeDIY
author_rank: Unknown
timestamp: July 19, 2016, 04:35:29 pm
content: I am trying to keep the Digital Oscilloscope Chart up to date.https://www.eevblog.com/forum/testgear/digital-oscilloscope-comparison-chart/But I do not have infinite time also and would like to have help from the people in the forum.* Are these Gratten models still the current models?ADS1000CAL+, ADS1000CML+The English website is under construction and the I can not read the original Chinese website.http://en.gratten.cn/<- Englishhttp://www.gratten.cn/<- ChineseWould some one help me on the models?*Is this models still current model?Agilent/Keysight DSO1000B*Is there other model it should be in the chart?Thanks,

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: July 19, 2016, 11:13:58 pm
content: The 1000B is still the current model for Keysight in this range.

author: tautech
author_rank: Super Contributor
timestamp: July 20, 2016, 12:09:27 am
content: Very likey they are:http://www.gratten.cn/Oscilloscope/AFAIK they are Siglent re-brands but I'm not entirely positive of that.Teardowns in the past have shown the PCB's to be labeled with Siglent logos.

author: fanOfeeDIY
author_rank: Unknown
timestamp: July 22, 2016, 11:33:36 am
content: Quote from: Keysight_DanielBogdanoff on July 19, 2016, 11:13:58 pmQuote from: tautech on July 20, 2016, 12:09:27 amThank you Daniel and tautech.Some of other things I wanted to add to the chart are columns of wave-gen and external-if.I will take time to work on them.By the way, I was on the YouTube for the first time.The Asian person talking from around47:3011:20 is me.https://youtu.be/fbTo3BwURg8

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: July 22, 2016, 05:09:56 pm
content: Nice! That had drawn schematic @14:30, wowAlso your English pronunciation in excellent!

author: TheAmmoniacal
author_rank: Unknown
timestamp: July 22, 2016, 05:58:08 pm
content: Quote from: Keysight_DanielBogdanoff on July 22, 2016, 05:09:56 pmSecond that. I wouldn't mind you doing more YouTube videos
GW Instek 2204E freezes on calibration - Page 1
Forum section: electronics / testgear

author: System Error Message
author_rank: Frequent Contributor
timestamp: July 21, 2016, 11:50:28 am
content: Hi i've got the firmware updated and whenever i try to do calibration (i plug from the rear calibration output into channel) the calibration starts and just hangs not showing any progress even after hours.

author: nctnico
author_rank: Super Contributor
timestamp: July 21, 2016, 10:28:29 pm
content: Did you connect the calibration output to the right input channel? IIRC the scope waits until it sees the calibration signal on the right input before continuing.

author: tautech
author_rank: Super Contributor
timestamp: July 21, 2016, 10:34:00 pm
content: Pics please

author: System Error Message
author_rank: Frequent Contributor
timestamp: July 22, 2016, 06:35:16 am
content: Yes i did connect the output from calibration but didnt connect ground on the input as it is a signal. Are you saying i would have 2 use 2 probes and touch them to each other?Should i use coax cable? set probe to 10x?

author: wraper
author_rank: Unknown
timestamp: July 22, 2016, 07:42:32 am
content: Quote from: System Error Message on July 22, 2016, 06:35:16 amAre you trying to stick the probe into the rear cal BNC?QuoteObviously two BNC connectors should be connected together with a coax cable with BNC connectors on it's ends LOL.

author: pascal_sweden
author_rank: Super Contributor
timestamp: July 22, 2016, 08:09:00 am
content: I have seen many unbox videos on YouTube, where people proudly unbox their brand new oscilloscope, and then they actually want to show some signal on the screen, but don't even have a BNC cable, so just stick in some alligator clips in the BNC inputs.Suddenly the unbox video has turned into a morron of the week video
Rishabh 18S tRMS 31000 count mutimeter tear down  - Page 1
Forum section: electronics / testgear

author: aniket
author_rank: Contributor
timestamp: July 21, 2016, 07:16:31 am
content: there is another one , I had this sitting around in my company lab ..Basic specs are as followsRISH Multi 18SFeatures :1. Basic Accuracy 0.05%2. Automatic Blocking System (ABS)3. Protective Rubber Holster for rough duty4. Analog scale (Bar Graph)5. Auto Ranging/ Manual Mode6. Optional: Computer connectivity with attachable interface adaptor using RISHCOM 100 software7. DC Voltage measurement 300.00mV to 1000.0V8. AC Voltage measurement 300.00mV to 1000.0V9. DC Current measurement 300.00mA to 10.000A10. AC current measurement 300.00mA to 10.000A11. Resistance measurement 300.00W to 30.000MW12. Diode Continuity13.Event Counter, Stop-Watch, dB measurement14. Wide range capacitance measurement 3.000nF to 10000mF15.Frequency measurement 300.00Hz to 100.00kHz16.Temperature measurement with Pt 100/Pt 1000Have a look everybody .....RegardsAniket
Any experience with cheap AD548 referance? - Page 1
Forum section: electronics / testgear

author: aquaaddict
author_rank: Contributor
timestamp: July 20, 2016, 10:41:35 am
content: Hi,Couldn't find any previous posts on this, just wondering if anyone has tried ones of thesehttp://www.ebay.com/itm/DROK-AD548-Precision-Voltage-Reference-Standard-Module-2-500V-5-000V-7-50-NEW-/331874915291?hash=item4d454953db:g:bc8AAOSwuhhXVdwDNot expecting top notch performance, but interested if anyone with accurate gear has tried it out to see if of use to the hobbyist.Anthony

author: MosherIV
author_rank: Super Contributor
timestamp: July 20, 2016, 11:10:46 am
content: HiDo you mean AD584??The AD548 is an op-amp.Try this threadhttps://www.eevblog.com/forum/metrology/are-cheap-ad584-units-worth-it/They are looking at a different style than the one in your reference.I built my own from a plastic DIP package AD584JN initial tolerance of +-30mV and 30ppm

author: aquaaddict
author_rank: Contributor
timestamp: July 20, 2016, 11:30:54 am
content: Ah, I didn't notice the ebay listing had it as 548, I copied the error, thats why my search didn't find anything.Thanks for the link, I have also found this interesting reviewhttp://www.markhennessy.co.uk/ad584_references/Seems there are a few units that vary a little in accuracy and the certificates are generally not worth the paper they are written on but looks like they serve a purpose for run of the mill hobby gear.Thanks

author: cncjerry
author_rank: Unknown
timestamp: July 20, 2016, 03:18:00 pm
content: I bought two, used a reference circuit, neither worked. Sitting next to me here for the past few months. Must have been static or something popped them. Sort of made me mad. First time that's happened where I blew two parts in a row. Well, probably not now that I think about it...

author: TiN
author_rank: Super Contributor
timestamp: July 20, 2016, 07:03:32 pm
content: I just tested one recently:Except some strange dip on 2.5V, i'd say pretty good results for such cheap simple reference.Raw DSV data, 10VRaw DSV data, 2.5V K2002Raw DSV data, 2.5V second K2002Raw DSV data, 2.5V 3458ARaw DSV data, 5V K2002Raw DSV data, 5V second K2002Raw DSV data, 5V 3458ARaw DSV data, 7.5V 3458A
RCA WO-91A - Page 1
Forum section: electronics / testgear

author: marcw
author_rank: Newbie
timestamp: July 22, 2016, 03:09:56 pm
content: Hi,Have a RCA WO-91A, non-functional. Will pull parts if you need for restoration, no cost other than shipping.http://www.radiomuseum.org/r/rca_wo_91awo91_oscilloscope.htmlThanks,Marc
HP 34401A AC CURRENT CALIBRATION? - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: July 20, 2016, 07:22:57 pm
content: I have a 34401A meter that appears to be well calibrated in DCV, DCI and ACV modes, however in ACI mode there is a healthy offset of about 40ma.Reading the calibration procedure it implies that you have to calibrate all offsets, and the ACI calibration procedure is missing from the procedure. I'm not sure if there is no ACI calibration and that the meter might rely on the DC calibration when used in AC current mode.Does anyone have any insight into ACI calibration?
Philips PM5190 Signal Generator Accuracy - Can someone verify this? - Page 1
Forum section: electronics / testgear

author: SaabFAN
author_rank: Frequent Contributor
timestamp: July 19, 2016, 10:23:09 pm
content: Over the last 3 months I have purchased several pieces of Philips T&M-Equipment. Among which are a PM5190 Signal-Generator (1mHz up to 2MHz) and a PM6654C Counter.To make use of all these beautiful digits on the counter, I've bought a Morion MV103 OCXO on Ebay, put it in a box and connected it to the Reference-Input on the back.What I then observed was that after about 1h of warmup the PM5190 seems to be stable to the last digit of the counter, which would mean a frequency accuracy of 10^-8 (last digit jumps up and down by one or two units). Pretty impressive for a TCXO made out of discrete components that is sitting pretty much alone in one quadrant of the bottom digital-board of the Signal Generator.But is it true? Or am I reading something here that simply isn't there?My PM3320A Scope shows a almost perfect sine-wave (FFT shows basically only the fundamental frequency) and I'm terminating the signal with 50Ohms inside the counter.What makes me a bit suspicious is the fact that I can only observe the described accuracy at frequencies higher than ca. 20kHz. Any lower than that and the accuracy drops significantly to about 10^-6 (last 3 digits are jumping all over the place).
Philips "short time counter" (vintage restoration project) - Page 1
Forum section: electronics / testgear

author: Martin.M
author_rank: Frequent Contributor
timestamp: July 13, 2016, 07:29:35 pm
content: here I made a video of this work of arthttp://www.wellenkino.de/pt1310/2002-04/DSCF0004.AVIread it like that: 99 komma 9999 seconds.the komma is following the second tube and powered by a bulb..actualy I am studying how the input is to use. There is no manual.greetingsMartin

author: VK5RC
author_rank: Unknown
timestamp: July 17, 2016, 12:12:30 pm
content: Fascinating device, Thanks for sharing.

author: radhaz
author_rank: Regular Contributor
timestamp: July 18, 2016, 01:56:28 am
content: Looks similar:http://www.tubeclockdb.com/on-ebay/162-vintage-tube-counter-e1t-philips-pw4062-gwo.html

author: Berni
author_rank: Super Contributor
timestamp: July 18, 2016, 12:48:21 pm
content: Nice looking bit of kit. Not at all useful in today's time but it still looks cool.Im sure it could be turned in to a neat clock by making the correct length time pule and having this thing measure it.

author: Martin.M
author_rank: Frequent Contributor
timestamp: July 19, 2016, 04:11:57 pm
content: there are enough people who destroy old testgear to build any kind of clock from the parts.I will NEVER do that.This counting oldie owns a 10kc crystal to be accurate.I will use it for drinking beer... it can display the time you get the glass, drink it empty and put it back on its place.The resolution is 1/10.000sec , very strongAfter repair of something in the PSU it counts now exactly, also the -8 -9 to zero.seehttp://www.wellenkino.de/pt1310/3.AVIgreetingsMartin

author: Martin.M
author_rank: Frequent Contributor
timestamp: July 19, 2016, 04:18:04 pm
content: Quote from: radhaz on July 18, 2016, 01:56:28 ampuh, the owner of that instrument can`t count up to seven.greetingsMartin

author: Berni
author_rank: Super Contributor
timestamp: July 19, 2016, 08:57:57 pm
content: Not saying to destroy it. It can likely be done without any modifications, just a outside box that generates a precise width pulse for the instrument to meshure where the digits are the current time.
Abuse in the home... - Page 1
Forum section: electronics / testgear

author: joeqsmith
author_rank: Super Contributor
timestamp: July 20, 2016, 02:35:08 am
content: I remember seeing some pretty bad examples on Microwaves 101 several years ago. Checked out their site and looks like a few more have been added. Attached two I thought were pretty good.Do you toss them all loose into a box and dig through them when you need one? Use a torque wrench? Touch them with your grubby fingers? Refuse to toss out a bad connector?

author: jjoonathan
author_rank: Frequent Contributor
timestamp: July 20, 2016, 02:48:29 am
content: Signal integrity, bitches!I should have taken a picture after one probe became two and I had to start using kapton tape on account of the scotch tape running out, but this is bad enough as it stands.

author: Assafl
author_rank: Frequent Contributor
timestamp: July 20, 2016, 09:36:48 am
content: Used to but toss 'em out now at first sign of fraying.If the smart man avoids costly mistakes and the clever one learns from his - I guess I am only clever and learnt to discard from a development kit I ruined and - Ahem - a really expensive hydrophone logger killed by fat probing. And I can now afford to keep a stock of spare connectors and probes (to avoid temptation)...

author: LPaul
author_rank: Contributor
timestamp: July 20, 2016, 04:20:26 pm
content: Probably the most informative video from the signal path:the first half is about how not to mistreat microwave connectors :p.I wonder how you can just throw expensive connectors in a box...

author: joeqsmith
author_rank: Super Contributor
timestamp: July 21, 2016, 01:57:45 am
content: I like how he jabs that sharp metal screw driver into everything.

author: Brumby
author_rank: Unknown
timestamp: July 21, 2016, 05:59:00 am
content: A whiff of RF voodoo .....Nice.
Grundig / Digimess RLC200 - Page 1
Forum section: electronics / testgear

author: Hydrawerk
author_rank: Super Contributor
timestamp: July 19, 2016, 02:06:21 am
content: Hello, I found these photos somewhere online. I think that Digimess RLC200 was produced like from 1997 to early 2000s. Any opinions? Any teardown photos?

author: Hydrawerk
author_rank: Super Contributor
timestamp: July 19, 2016, 02:12:01 am
content: It is quite similar to a Tesla BM593 produced in Czech republic in early 1990s probably.I am not the author of these photos.
What is this? a programmer? (Anders elektronic Dator A2540)  - Page 1
Forum section: electronics / testgear

author: MrZwing
author_rank: Regular Contributor
timestamp: July 19, 2016, 03:11:25 pm
content: I found this in a thrift store and i didn't know what it was but i knew i just had to buy it since it looked so epic cool.though ofc i want to know what it is and if it is somewhat useful for anything just for fun.it seems very old i would guess 70's? but just look at it with the all the buttons ans switches. it's just beautiful and fun.it says "Anders Elektronik" on it and German text about reading and programming and Dator A2540 so i guess it is a reader or programmer of sort? i just really want to know.

author: helius
author_rank: Super Contributor
timestamp: July 19, 2016, 03:30:27 pm
content: A PROM or EPROM programmer specialized for use by field engineers for specific equipment, and built into a suitcase.This frequently meant burning, copying, or modifying ROMs for radio communication or PLC machinery, such as programming repeater lists for radio units, or logic ladders for industrial PLCs. Generally, not useful for other jobs.

author: MrZwing
author_rank: Regular Contributor
timestamp: July 19, 2016, 03:33:56 pm
content: Is there any collector value in it or is it just a "fun to have" thing, becuse i do like its details and switches.. the foam need to be replaced since it more powder than protection and getting everywhere.?

author: MrZwing
author_rank: Regular Contributor
timestamp: July 20, 2016, 08:26:30 am
content: I have plans to clean it up today, so i might as well take it apart (and i have not turned it on).ill post the teardown in a seperate thread.
Tektronix 465 Operating Instructions 1975  on cassette tape  - Page 1
Forum section: electronics / testgear

author: ez24
author_rank: Super Contributor
timestamp: July 16, 2016, 10:41:55 pm
content: HiI just got a 465B, and one of the things that came with it is a cassette tape "Operating Instructions" by Chuck MillerI do not have a cassette player. I could not find anything with google. Does anyone have a computer file copy? If not I will have to buy a player to listen to it.Does anyone remember hearing it?thanks

author: timb
author_rank: Super Contributor
timestamp: July 16, 2016, 10:52:31 pm
content: Quote from: ez24 on July 16, 2016, 10:41:55 pmCan you take a picture of it?Also, you should really maybe only start a single thread for this, like "Questions about my new 465B". You don't really need an entirely separate thread for each short question. Just make one thread, with all your questions in it. It keeps clutter down and makes things easier for people to keep track of.

author: ez24
author_rank: Super Contributor
timestamp: July 16, 2016, 11:59:34 pm
content: Quote from: timb on July 16, 2016, 10:52:31 pmPics of the tape attachedSince the scope came with 2 - 10x probes and a current probe - my guess is the original owner was going to work on power supplies. No more goodies.

author: SeanB
author_rank: Super Contributor
timestamp: July 17, 2016, 07:08:20 am
content: Go to Wallyworld and you will find a USB tape player, which will allow you to use Audacity to record the tape into digital form.

author: timb
author_rank: Super Contributor
timestamp: July 17, 2016, 02:05:07 pm
content: Quote from: ez24 on July 16, 2016, 11:59:34 pmWow, I've never seen a Tek audio tape before. At first I was thinking it might have been some sort of software (back in those days cassette tapes were used for data storage), but the 465 doesn't have any sort of GPIB or other digital interface, so that can't be it.I'd guess they might have been for some sort of training course. Personally, I'd be interested to hear what's on them!If you're inclined enough, grab a USB cassette deck from Wal-Mart. Or, you could stick em in a padded envelope and send them my way (Media Mail shouldn't cost more than $2). I can digitize and upload them.

author: ez24
author_rank: Super Contributor
timestamp: July 17, 2016, 05:43:40 pm
content: Quote from: timb on July 17, 2016, 02:05:07 pmThis is what I will do. Can MP3 files be uploaded to this forum?
Nexus 5001 debug interface - Is it widely used next to the JTAG debug interface? - Page 1
Forum section: electronics / testgear

author: pascal_sweden
author_rank: Super Contributor
timestamp: July 17, 2016, 08:01:07 am
content: Most electronic systems come with a JTAG debug interface, but another interface standard for On-Chip Debug Systems is the Nexus 5001 Standard for a Global Embedded Processor Debug Interface (IEEE-ISTO 5001).The Nexus 5001 debug interface standard is capable of exchanging data at a much higher bandwidth.I was wondering if the Nexus 5001 debug interface is widely used in general, and if it also has been used specifically in test and measurement equipment.
Kikusui cos5100TM scope - Page 1
Forum section: electronics / testgear

author: stj
author_rank: Super Contributor
timestamp: July 15, 2016, 01:13:26 pm
content: anybody got a service manual or schems?

author: tautech
author_rank: Super Contributor
timestamp: July 15, 2016, 08:30:52 pm
content: Quote from: stj on July 15, 2016, 01:13:26 pmSome links found:http://www.kikusui.co.jp/manuals/index_e.php?GROUP=COS&skip=11http://elektrotanya.com/kikusui_cos5040_sch.pdf/download.html45.5 MBWait for "processing" to change to "get manual"EditSpelling

author: albert22
author_rank: Regular Contributor
timestamp: July 15, 2016, 11:22:02 pm
content: I have a COS5100 and would appreciate a service manual or a schematic too. Never found anything, besides user manuals on the web.Good luck

author: stj
author_rank: Super Contributor
timestamp: July 16, 2016, 01:36:55 am
content: Quote from: albert22 on July 15, 2016, 11:22:02 pmis it a 5100, or a 5100TM - they are very different!

author: albert22
author_rank: Regular Contributor
timestamp: July 16, 2016, 05:08:54 am
content: I have a COS5100 (not TM). Just tried to google for it, again to no avail. Tucker offers a service manual that includes the schematics for $40 but is for the 5100 version. I dont know the differences between the two models.

author: stj
author_rank: Super Contributor
timestamp: July 16, 2016, 06:25:49 am
content: the first link posted by Tautech has the user manuals - you can compare them.
DSOX-3000T demonstrations missing - Page 1
Forum section: electronics / testgear

author: npeter
author_rank: Newbie
timestamp: July 15, 2016, 07:23:32 pm
content: Hello everyone!I have just purchased an DSOX-3014T oscilloscope with free MSO upgrade and DSOXT3APPBNDL.The first thing I wanted to try out is the integrated demonstration feature of the scope (shown by Dave as well), but all I found was the Training signals option under the Help menu. There are no signs of any "Auto demo" or "Apps demo" options...Where can I find these menus?I thought these are parts of the DSOXEDK software option that I also received with the DSOXT3APPBNDL.Thanks for your help!Peter