hybridfree/eevblog-posts huggingface dataset:
tek TBS2204B vs Keysight MSO-X 2024A - which one to buy as entry level oscillosc - Page 1
Forum section: electronics / testgear

author: hilper
author_rank: Contributor
timestamp: May 13, 2022, 05:29:00 pm
content: Hello allI'am new on this forum.We need to buy an extra entry level oscilloscope (osc) for my workplace.I have been looking at tek TBS2204B & Keysight MSO-X 2024A.So, I must decide which one to choose.In doing so, I need your help.Our lab is current equipped with the following osc:OSC1: Keysight 6000 seriesOSC2: Keysight 4000 seriesOSC3: the predecessor of the tek TBS2204BSo, you can say, that our new extra entry level osc do not need to have more advanced features (like mixed signal & segmented memory), as the 2 Keysight osc already have these features. But of course, if it has it and if it does not compromised more important needs (such as easy of use), it is well received.The 200 MHz BW & the 1 GSample/s sample rate (4x channels) fits very well for our signals of interest.OUR PRIMARY NEEDS (for the new one):Ease of useWhat do you think about it ?BR Per

author: nctnico
author_rank: Super Contributor
timestamp: May 13, 2022, 09:34:45 pm
content: IMHO the Tektronix TBS2000B series is a very nice bare bones oscilloscope for use by less experienced people. I use the previous version (regular TBS2204) at a customer every now and then and for what it does, I like it. Crisp screen, easy to use and what is there just works as expected.

author: zrq
author_rank: Frequent Contributor
timestamp: May 13, 2022, 09:45:58 pm
content: I somehow have an impression that the Tek's entry level scopes (Used two and it's common, but don't recall the exact model number) have terrible user experience due to the lagging UI. The Keysight ones I use daily are much more responsive comparing to it.Edit: Also consider the Chinese ones, Rigol and Siglent, they are very cost effective and do a proper job.

author: kcbrown
author_rank: Frequent Contributor
timestamp: May 13, 2022, 09:51:13 pm
content: Quote from: hilper on May 13, 2022, 05:29:00 pmWhy not the DSOX-1204A?

author: nctnico
author_rank: Super Contributor
timestamp: May 13, 2022, 10:11:00 pm
content: Quote from: zrq on May 13, 2022, 09:45:58 pmThose are the MDO3000 and MDO4000 models and -from what I have read- slow down when they need to do heavy math or decoding.

author: bdunham7
author_rank: Super Contributor
timestamp: May 13, 2022, 10:15:09 pm
content: I've no experience with the MSO-X 2024A, but the Tek TBS2204B is a very nice albeit not cheap 'basic' oscilloscope. And it's not so terribly basic, just not cutting edge at its price point. It does have TekVPI, which allows you to use some very advanced probes if necessary.
Fluke Scopemeter 190 series 192 196 199 LCD repair - horizontal lines - Page 1
Forum section: electronics / testgear

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: May 13, 2022, 02:01:26 pm
content: Hi,I have a Fluke monochrome scopemeter that has the common problem of horizontal lines on the LCD display.I attempted the repair by warming the flexible conductive tape that connects the glass to the PCB. It worked for a while but then it went bad.On eBay there is a vendor, joelfriend, selling a service to fix the problem.Link:https://www.ebay.com/itm/230424487426?hash=item35a65ea602:g:DPUAAMXQlgtS8X1oThe same company, offers the same thing on their website:Link:http://scopemeterrepair.com/catalog/190Has anybody had any experience with this service? Does the 'fix' solve the problem or does it come back?Many thanks!!Jay_Diddy_B

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 02:09:04 pm
content: It may be necessary to replace the conductive tape.Send a real picture, everyone can help think of a way

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: May 13, 2022, 02:35:04 pm
content: Hi,I don't want to take mine apart again, but here is a picture from Dave's repair video on the same problem:This is in EEVblog video 808:This is what I tried the first time.I am looking for feedback from people who have used the repair service.Jay_Diddy_B

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 02:49:37 pm
content: You need to buy the conductive ribbon below (Chinese call it zebra paper)，There is also a "T" type soldering iron tip that can be heatedFor details, please see the attached pictures and forum linkhttps://www.mydigit.cn/forum.php?mod=viewthread&tid=136086&highlight=%E5%AF%BC%E7%94%B5You can only solve this fault completely by replacing it, the heating is not stable for a long time, because the conductive material has aged

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 03:06:46 pm
content: You must use a vernier caliper to accurately measure the size of this flexible cable.Then go to China Taobao and search, the following is the link I probably foundhttps://item.taobao.com/item.htm?spm=a230r.1.14.21.3ec14631MbtgwH&id=42864739620&ns=1&abbucket=19#detail
GoldStar 1.3GHz Universal Counter FC-2130 & FC-2130U - Page 1
Forum section: electronics / testgear

author: lordhex
author_rank: Newbie
timestamp: October 27, 2020, 12:48:34 pm
content: Hello,Wanted to start this thread about this little known frequency counter - FC-2130 and its (more options) sibling FC-2130U.I've purchased it from eBay recently, defective and I need help troubleshooting it/fixing it.Wondering if someone had/has any experience with it, manuals, service manuals, schematics.Attached are all the documents I was able to find about this.One of the first things to trobleshoot was the power rails. It has only +5V and -5V power rails using 7809 and 7909 ICs.The ripple was about 1V, which led me to replace the electrolitic capacitors before (1000uF/16V) and after (2200uF/16V) the power regulators.Many thanks in advance.

author: CHexclaim
author_rank: Regular Contributor
timestamp: February 18, 2022, 06:47:53 pm
content: Hello. I have one that I want to start using it. It has been stored until now. I have the manual but doesn't have a schematic. I can scan it if required.I checked it with the GPSDO and is about 50 Hz off at 10 MHz so I intend to calibrate it. So, I am also after a service manual or at least a callibration procedure.CH

author: CHexclaim
author_rank: Regular Contributor
timestamp: May 11, 2022, 06:41:12 pm
content: I tried to calibrate it but the clock unit was damaged or something as while trying to adjust it, frequency value jumped all over.What I finally did was to buy one of those inexpensive OCXOs off ebay, installed it inside, routed the clock signal to it instead of to the original clock, calibrated the OCXO with the GPSDO an done, it works excellent and has a time base far more precise than required.CH!
Where to find DG811 DG812 in Australia? - Page 1
Forum section: electronics / testgear

author: rvalente
author_rank: Frequent Contributor
timestamp: May 11, 2022, 01:40:10 am
content: Hello mates,could anyone tip me where to find a dealer with a DG811 or 812 in stock in Australia?Greetings

author: Muttley Snickers
author_rank: Unknown
timestamp: May 11, 2022, 03:27:16 am
content: Quote from: rvalente on May 11, 2022, 01:40:10 amEmona Instruments.https://emona.com.au/products/electronic-test-measure/function-generators-counters/dg-812.html

author: rvalente
author_rank: Frequent Contributor
timestamp: May 11, 2022, 03:37:44 am
content: Hi, i've already reached them, not in stock, only Dg952
Rigol hack DS2072A in 2022  - Page 1
Forum section: electronics / testgear

author: jsquaredz
author_rank: Contributor
timestamp: May 11, 2022, 12:55:44 am
content: Hello all. I have the DS-2072A but never got around to hacking it. I am wanting to do it now but when I read the instructions on the forum I keep getting jammed looking for the German software to interface. A bunch of websites reference it, but they all lead to a dead end with a broken website that once hosted that application. Does anyone have the application and can zip it and post it here or I can give you a OneDrive link to drop into. Thanks in advance.https://peter.dreisiebner.at/rigol-bildschirmkopie/

author: KeBeNe
author_rank: Regular Contributor
timestamp: May 11, 2022, 01:40:49 am
content: Hello,I hope this helps...https://www.dropbox.com/s/p2fsc1etmffpgfh/RigolBildschirmkopie_Libs.zip?dl=0
Has RCC Electronics in Canada changed website, or name ?? - Page 1
Forum section: electronics / testgear

author: MathWizard
author_rank: Super Contributor
timestamp: May 16, 2022, 11:14:04 am
content: I got all my Siglent gear from RCC Electronics in Ontario, Canada for a great deal, and today I went to look at their site, and all the links that google finds, display a blank page and "file not found" when u click on them.Anyone know of them and if that's just some site maintenance, or server issue? Or site change ? Or did they close down ? I see them still listed on Amazon as retailers.By Christmas I'll be looking for a SDS2104x+ , then hack it. I'd gladly get a used 1, but I've never seen a used 1 for sale.

author: tautech
author_rank: Super Contributor
timestamp: May 16, 2022, 11:57:06 am
content: Yep their website link is dead however their phone # is available on the Siglent NA Canadian authorised partners webpage:https://siglentna.com/how-to-buy/Time to get on the good old dog and bone.
TTI 1705 Multimeter Svc manual / schematic  - Page 1
Forum section: electronics / testgear

author: vandersonpc
author_rank: Contributor
timestamp: May 10, 2022, 07:54:16 pm
content: Hi All,Does someone has the TTI 1705 bench multimeter service manual and/or schematic? Need that to repair my multimeter with some auto scale issues.Many thanks!Vanderson

author: Specmaster
author_rank: Super Contributor
timestamp: May 10, 2022, 10:04:42 pm
content: I think your best bet is to give TTi a call in the morning and speak to their technical section. I have done this a number of times and they are usually for helpful and seeing as it is pretty recent meter they should be able to help you out.
HP54616B Firmware EEPROM Type? - Page 1
Forum section: electronics / testgear

author: EEngo
author_rank: Unknown
timestamp: May 10, 2022, 02:29:38 pm
content: Hi all,I was going to read (and save for future) the firmware flash content of my HP54616B Oscilloscope.Unfortunately they ripped the numbers off? I must confess, that was not expected for older HP gear ...for the 68k CPU, I would expect two TMS27PC512 perhaps?Does someone know what type of memory chips PLCC32 these are?(no, the service manual doesn't help, it contains no part information)Thanks in advance,ingo.
is gw instek 1052-u worth it - Page 1
Forum section: electronics / testgear

author: OwaisAhmed
author_rank: Contributor
timestamp: May 10, 2022, 09:16:54 am
content: is gw instek 1052-u worth it for repairing and working with arduino. or is there an problem with this scope

author: Fungus
author_rank: Super Contributor
timestamp: May 10, 2022, 10:29:56 am
content: Depends on the price and what other choices you have where you live.ANYoscilloscope is worth owning if you don't have one. The difference between owning one/not owning one is night and day.On the other hand: For working with "Arduino" four channels is highly desirable and it's good to have serial decoders (especially I2C).

author: OwaisAhmed
author_rank: Contributor
timestamp: May 10, 2022, 11:05:48 am
content: the other choice i have is tektronix tds 220 for 140$. and gw instek gds 1052-u for 100$

author: rvalente
author_rank: Frequent Contributor
timestamp: May 10, 2022, 12:16:14 pm
content: Assuming both are running fine,TDS220Cons:Very very short memory length, only 2.5kUgly screen, often dimmed from a tired CCFLAt least with the GDS you can get 4k of memory (still, very very short) and a color screen.Actually I would not by neither of them, but I imagine is not easy buying equipment in Pakistan.

author: Fungus
author_rank: Super Contributor
timestamp: May 10, 2022, 02:03:29 pm
content: Quote from: OwaisAhmed on May 10, 2022, 11:05:48 amFor $100? Take it.(assuming it works and has probes, etc)

author: nctnico
author_rank: Super Contributor
timestamp: May 10, 2022, 08:19:06 pm
content: Quote from: rvalente on May 10, 2022, 12:16:14 pmI agree. Just for the age the GDS 1052-u is the better choice.
Agilent N9310A service manual - Page 1
Forum section: electronics / testgear

author: czorgormez
author_rank: Contributor
timestamp: May 09, 2022, 08:51:51 pm
content: i have one faulty agilent n9310a signal generator and i need service manual (or some help) to repair it.the device says digital board error - analog board error. and when i click to see device information some random characters appear on the screen.i removed analog board and only one time it showed digital board OK but i couldn't repeat that situation. any idea ?ps: i found one faulty regulator at Analog 5 volt rail and fixed it, but nothing changed.
Revert USBeeDX clone to original Win driver after usage with sigrok/pulseview - Page 1
Forum section: electronics / testgear

author: emece67
author_rank: Frequent Contributor
timestamp: May 08, 2022, 09:05:46 pm
content: .

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 08, 2022, 09:10:42 pm
content: Simple as going into the device manager, clicking on the device and reverting to previous driver.

author: emece67
author_rank: Frequent Contributor
timestamp: May 09, 2022, 08:03:57 am
content: .
Cheap $50 Iwatsu ss-5702 oscilloscope is it any good? - Page 1
Forum section: electronics / testgear

author: CHIPHEAD
author_rank: Newbie
timestamp: May 07, 2022, 08:44:50 am
content: Good day,I'm still a newbie when it comes to electronics and just doing it as a hobby and loving it...I saw Dave's video on $50 oscilloscopes and was very glad to hear that I don't need the latest and greatest oscilloscope for what I'm doing.So I went treasure hunting and found a Iwatsu ss-5702 that's working and in excellent condition for 550 ZAR (+/- 35 USD at time of posting).My questions on it is,Is it a good brand,how reliable and fixable is it and just overall it a good oscilloscope?Thank you.

author: Gerhard_dk4xp
author_rank: Frequent Contributor
timestamp: May 07, 2022, 04:02:12 pm
content: I have a 200 MHz SS-5712 which I bought new some 40 years ago.It was positioned against the TEK 475 but had a brighter trace forvery fast events.After abt. 15 years a transistor in the horizontal deflection ceasedto work. That was easy to find because the manual contains allthe circuits.regards, Gerhard.

author: orbanp
author_rank: Regular Contributor
timestamp: May 07, 2022, 10:29:39 pm
content: I have an 5702, got it in the early '80s, second hand, it was only a year or two old.Generally great scope, still on my bench.Now some of the switches, AC, GND, DC, and the input attenuators start getting intermittent, though I only used the scope lightly during the years.Exercising the switches helps temporarily.I guess I need to take it apart and clean the switches.Good luck, Peter
Offset present before triggering burst, EDU33212A. Expected behaviour? - Page 1
Forum section: electronics / testgear

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: May 08, 2022, 05:21:27 am
content: Hi! so, i'm setting up a burst of sine cycles, manually triggering the generator, and I noticed on the oscilloscope that while the burst was "ready" but not triggered yet, there is an offset at the output of -0.5v. I thought at first maybe something off with the oscilloscope, but probing the output of the generator with a multimeter, i also measure -0.5v DC. When the burst is triggered, also, instead of going back to 0v, it goes to -0.5v. Reading the user manual sections on bursts, there is no mention anywhere of an added offset inherent to the burst mode, be it manually triggered using the front panel button or any other trigger source. To check if there was an offset at the output, i then changed to the dc output mode, and when selecting 0v, it correctly shows 0v on the oscilloscope and the multimeter. this "resting" offset appears only in burst mode, and the signal properly swings to its max and min values when the burst is triggered, it just returns to -0.5v when the burst ends, and rests there until a new burst is triggered.Is this the expected behaviour of a generator in burst mode? does this happen with other generators?Thank you!

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: May 08, 2022, 06:04:48 am
content: changing the start phase of the burst changes the resting offset, which makes sense, but one would expect 0° bursts to start at the 0v crossing

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: May 08, 2022, 08:43:22 am
content: Yes, this is somewhat the expected behavior of a function generator. It should output the first point of the burst waveform and come back to the same point after the burst. You are right that for sine waveform, setting the phase to 0 should make the signal zero. Maybe there is some other phase setting associated with synchronization of the two channels that also affects it. Also possible it has a bug.Speaking of bugs, there is a problem with square wave bursts on 33522A generator that as far as I know never got addressed:https://www.eevblog.com/forum/testgear/agilentkeysight-awg-fw-errors/On some generators, for example Rigol dg800, dg900 series, there is a separate setting for idle phase.

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: May 08, 2022, 09:31:44 am
content: Quote from: maxwell3e10 on May 08, 2022, 08:43:22 amThank you, you mentioning specifically that for sine the phase at 0 should make the signal 0 as well made me want to try the other waveforms, and i found that they all behave as one would expect them to! and as they are displayed on the generator settings. So it seems this really is a bug, affecting only the sine burst
spectrum analyser or oscilliscope. R&S vs Siglent, Rigol, other. - Page 1
Forum section: electronics / testgear

author: loki42
author_rank: Frequent Contributor
timestamp: May 04, 2022, 01:30:59 pm
content: I'm wondering if my R&S RTM3004 (COM, all options) is suitable with the FFT stuff for basic pre compliance with a LISN or if something like the FPC1500 would be a good addition. Is there other options i should look at? I won't be using it a lot and it's right next to my computer so I'd be happy with USB based systems as well. I enjoy the R&S UI / general vibe but also have Agilent / Keysight gear and open to others. Are there hardware agnostic EMC software like R&S Elektra? Is it worth it for occasional use?

author: loki42
author_rank: Frequent Contributor
timestamp: May 06, 2022, 12:21:11 pm
content: I've also got some rigol gear so I'm open to Siglent & Rigol too or other options.

author: Kean
author_rank: Unknown
timestamp: May 06, 2022, 12:55:00 pm
content: For conducted emissions with a LISN you are generally doing from 9kHz or 150kHz up to 30MHz, so it doesn't require an expensive SA.I mostly use a Rigol DSA815 with Tekbox TBLC08 AC LISN and occasionally with a TBTC2 TEM Cell. For higher frequency measurements I have a SignalHound SA44B.For software I use the Tekbox EMCview which works with various Rigol, Siglent, & low-end R&S SAs (license is tied to the SA serial number).https://www.tekbox.com/product/emcview-pc-software-emc-compliance-testing/Not sure about the FFT suitability, but it seems to me that it would be too limited due to the lack of scope dynamic range even with 10-bits, let alone other features in an SA with EMI filter.

author: nctnico
author_rank: Super Contributor
timestamp: May 06, 2022, 04:26:11 pm
content: IMHO a spectrum analyser will be more convenient and it has the required dynamic range. For conducted emissions, the limits are ball park -50dBuV which is a signal level that is below what you can measure with a common DSO.
Fluke 16xx series multifunction installation tester - Page 1
Forum section: electronics / testgear

author: wertyu
author_rank: Contributor
timestamp: May 14, 2022, 09:20:25 am
content: Just bought this off auction, no battery or leads it turns on with my power supply so i am going to by a battery pack for it.My question is the 3 pin live lead connector , will it work with a normal test lead or do i need to buy a proprietary Fluke lead.

author: AVGresponding
author_rank: Super Contributor
timestamp: May 14, 2022, 09:38:19 am
content: The live test lead includes a control button to start the test. I don't know if it's a simple switch, or sends serial data, though I would suspect the former.NB: The input protection on these is not up to the usual Fluke standards, at least in terms of meter robustness; they have a tendency to die if connected to a power source (ie UK mains) when in continuity mode, something an F87 would (most likely) survive...

author: colourlessgreenideas
author_rank: Newbie
timestamp: May 15, 2022, 10:22:58 pm
content: Quote from: AVGresponding on May 14, 2022, 09:38:19 amYes, it is just a switch.
Hameg HD148 printer firmware > V1.3 - Page 1
Forum section: electronics / testgear

author: sorenkir
author_rank: Regular Contributor
timestamp: May 06, 2022, 12:23:37 pm
content: Hello,I have this graphics printer with firmware V1.2 080393.To connect it to an HM305 oscilloscope, I need V1.3 or higher.Does anyone have this or know where I could find it?Thanks,Michel.
SR1 or APx525 - Page 1
Forum section: electronics / testgear

author: ezalys
author_rank: Frequent Contributor
timestamp: May 06, 2022, 11:15:24 pm
content: I'm shopping for an audio analyzer for our lab. Our labmates are big fans of the SRS SR1 thanks to the built in monitor and front panel controls, which I admit are very nice. I'm pushing for the APx525, which despite being much more expensive should be in budget. My main reason for wanting it is the extra bandwidth, which would be very useful for my work. That said, have people compared the software on the SR1 to the APx525? I'm arguing that if we buy a decent laptop and duct tape it to the analyzer, this should be fine. However, if the software is super user-unfriendly I don't want anyone to hold any grudges against me! Does anyone have any thoughts?
I am looking for a circuit for DMM Hioki-3208 - Page 1
Forum section: electronics / testgear

author: museumrza
author_rank: Newbie
timestamp: January 17, 2022, 06:24:14 pm
content: HelloI'm going to write an article and make a film about the Hioki 3208 multimeter calculator.Does anyone have a wiring circuit diagram for this device?Best regards, Nikita

author: museumrza
author_rank: Newbie
timestamp: February 11, 2022, 12:09:29 pm
content: Unfortunately, I never found the scheme, but I shot a video about it, and wrote several articles (a lot of photos)https://youtu.be/z6yNMn0k6-whttps://habr.com/ru/company/ruvds/blog/646783/http://museumrza.ru/ETL/measuring_instruments/hioki-3208

author: Thundr_Pat
author_rank: Newbie
timestamp: May 05, 2022, 02:29:17 pm
content: Thanks for the links. I really enjoyed the articles.
MEGURO MN-446A Noise Meter - Service Manual / Repair help? - Page 1
Forum section: electronics / testgear

author: Kings.Warren
author_rank: Newbie
timestamp: May 06, 2022, 10:56:39 pm
content: Hi all,I have a MEGURO MN-446A Noise Meter that's suffering from an internal oscillating noise problem - the issue manifeasts itself with an offset reading appearing when using the ranges 100mV and below.On the 10uV range the meter needle swings and hovers around the midaway position of the meter. In all cases a short circuit is applied to the input.The weird part is that the meter needle slowly oscillates back and forth (approx 0.5 Hz) - the needle is not steady reading.(The instrument hasn't been used for 5 years and was working to spec before then.)I did reachout to Meguro Electronics Corp's new owners in Japan, KEISOKU GIKEN Co., Ltd. They gave me the runraround, at first it was a yes, we will email the service manual for repairs - they sent the user manual with the schematics removed from the backpages. I offered to pay their costs - No: we've never given out Meguro Service Manuals or schematics was the reply - strange I have two other Meguro User/Service Manuals each with schematics in the back sections and servicing tips.A Service Manual with schematic diagrams would be very much appreciated.Thanks!

author: Kings.Warren
author_rank: Newbie
timestamp: May 07, 2022, 01:09:44 am
content: Quote from: Kings.Warren on May 06, 2022, 10:56:39 pmPhotos show the front external.With noise shield (Al.) attachedControl Board with battery backed settings register - not IEEE-488/HP-IB - just binary bit settings to control the range, weighting filters and the meter rectifier/detection circuits.Last photo shows thw PSU board in the forground, with the weighting filter board behind.If you ever wondered who ever used the old RCA/Harris/Intersil -CA3100E- these guys loved them!
Eleshop active rf probe - Page 1
Forum section: electronics / testgear

author: ozkarah
author_rank: Regular Contributor
timestamp: May 04, 2022, 07:36:25 pm
content: Hi guys,Does anyone have any experience with active rf probes sold at Eleshop, or a better and easy to reach alternative?It is just 25 Euros.https://eleshop.eu/actieve-rf-probe-inclusief-rf-kabel.html

author: nctnico
author_rank: Super Contributor
timestamp: May 04, 2022, 07:46:29 pm
content: That is the 'classic' Elektor probe. You can find these much cheaper on Ebay / Aliexpress.

author: ozkarah
author_rank: Regular Contributor
timestamp: May 05, 2022, 03:28:36 pm
content: Quote from: nctnico on May 04, 2022, 07:46:29 pmI already tried but couldn't find anything else than thesehttps://www.ebay.com/itm/175267051255?hash=item28cebaf6f7:g:vZYAAOSwK6RZJdoxhttps://www.ebay.com/itm/332253695460I appreciate if anyone could point me to the right direction. Does it make more sense to buy a used commercial active probe.My scope is Siglent SDS 2104X Plus with 500 MHz upgrade.Regards...

author: nctnico
author_rank: Super Contributor
timestamp: May 05, 2022, 04:09:46 pm
content: Better start at the beginning: what kind of signals do you want to measure? From there you can set some basic specifications for a probe. In many cases using a direct cable connection is a better option. A direct cable connection will always be superior compared to probing.I have bought a few of the Elektor probes for a few euros each but never used them because they are AC only and need a relatively high supply voltage. A probe that can be powered through a USB connection is much more convenient.
Change trace colors of DS1054Z oscilloscope (firmware hack) - Page 1
Forum section: electronics / testgear

author: maelh
author_rank: Regular Contributor
timestamp: March 05, 2022, 01:49:58 am
content: Hi,Since the DS1054Z has been hacked before, I was curious to know if somebody found out where in the firmware the colors of the traces are stored.Did anybody have success with this? Would you have to updated some CRC or other values such that this "color hacked" firmware could be uploaded to the scope?

author: MarkF
author_rank: Super Contributor
timestamp: May 05, 2022, 10:11:13 am
content: There is a firmware hack to clean-up the fonts on the menus. Mostly to use the same font-face I believe. It also changed the background shading on the menus.I'm not aware of a hack to change the trace colors.I wished the dark blue trace was green. However, I believe the MSO channels use green. Not sure, I don't have the MSO version.I believe it's in the hughSniffing the Rigol's internal I2C bustopic (near the end).
Aeroflex 3250 SA options - Page 1
Forum section: electronics / testgear

author: 1design
author_rank: Regular Contributor
timestamp: May 04, 2022, 05:46:12 pm
content: I own a 3250 series SA, these were discontinued by Aeroflex before they were bought by VIAVI and they are not supported anymore. I wanted to ask if anyone has found a way to enable extra options?
Problem Licensing VSA on  DSO91304A - Page 1
Forum section: electronics / testgear

author: trets
author_rank: Newbie
timestamp: May 04, 2022, 01:18:46 pm
content: Dear Team,I am trying to get VSA working on my DSO91304A. I installed the software on the device, but I can’t even get a trial key, because when I sent request to get the trial key, manufacturer asks me for the name of the company and my company’s website on the Internet.Since I'm an individual and not a company, I can't even get info on what this key looks like...Can somebody please help me? How to make it work?
[ask] chauvin-arnoux current probe  - Page 1
Forum section: electronics / testgear

author: e0ne199
author_rank: Regular Contributor
timestamp: April 29, 2022, 10:58:12 am
content: hello everyone,does anybody here have the datasheet of this probe?

author: e0ne199
author_rank: Regular Contributor
timestamp: May 03, 2022, 11:05:48 pm
content: wow...nobody has it?i thought chauvin-arnoux was a well-known brand

author: Martin72
author_rank: Super Contributor
timestamp: May 04, 2022, 04:01:10 am
content: Hi,Today´s substitute for the C 30 series are theC 100series....
Anyone have firmware for the old Red YZX Studio USB 3.0 Power Meter ? - Page 1
Forum section: electronics / testgear

author: farrell
author_rank: Contributor
timestamp: May 03, 2022, 11:00:42 pm
content: Back in 2015 there was a popular USB power meter made by YZX Studio. I bought a Red one from Franky on eBay a long time ago. It seems there was a firmware update available, as shown in this video by Julien Ilett:Does anyone still have the firmware, or any other information about this tool? Even the original documents in Chinese would be fine, I can have a friend translate it for me.I emailed Franky yesterday but have not heard back yet. Thought I would check with the people here.Thanks,-Farrell
Calibration guide for a "RACAL-DANA 9906 Universal Counter Timer" - Page 1
Forum section: electronics / testgear

author: wobbly
author_rank: Regular Contributor
timestamp: May 02, 2022, 07:09:59 pm
content: Hi,Just today I finished refurbishing a lovely 1984 vintage RACAL-DANA 9906 Universal Timer Counter unit.It works just fine and dandy but it does require calibrating / tuning. Last time it was calibrated was early 2013 according to the stickers it came festooned with.When reading a 1 MHz sine wave signal from my sig-gen (a calibrated Keysight EDUX1052G Wave Gen output) it measures 999,995 Hz, or in other words 5ppm low.Similarly, at 20 MHz (the Keysight's maximum output freq) it reads 19,999,900 Hz, again 5ppm low.The user manual is readily available for this machine, but this document does not cover the calibration / tuning procedure. For the life of me I cannot find the "service manual" or "calibration manual" for this device.Can anyone point me in the right direction so that I might get my 9906 properly dialled-in and reading true?

author: coromonadalix
author_rank: Super Contributor
timestamp: May 02, 2022, 07:25:54 pm
content: http://ftb.ko4bb.com/getsimple/index.php?id=download&file=Racal/Racal_Dana_9901_Universal_Counter-Timer_Service_Manual.pdfDoes it show some similarities with this one ?? There was some similarities between some models in this era ??

author: wobbly
author_rank: Regular Contributor
timestamp: May 03, 2022, 07:46:55 pm
content: I think this will do the job! At least for now anyway.I've currently got my scope (triggering from it's integrated wavegen set to 1 MHz, 4 vp-p) sampling from the 9906's output BNC.The calibration trimmer is (amazingly) still working smoothly after all these years. I'm still waiting for it to warm up to a stable temperature, but I've already improved the accuracy of the unit. Another hour or two and I think I'm in business!Thanks for finding this, good on yer
Schematic for Agilent E5070B - Page 1
Forum section: electronics / testgear

author: Neuro
author_rank: Contributor
timestamp: May 03, 2022, 04:36:48 pm
content: Hi everyone!I've got a couple of dead Agilent E5070B that I'd like to repair and I was hoping to get a schematic somewhere. Agilent's website does not have one.Any idea where I can find one?Thank you very much!

author: fourierpwn
author_rank: Regular Contributor
timestamp: May 04, 2022, 12:02:08 am
content: The power supplies in these units are commercial off the shelf (COTS) parts - not Keysight branded. Rather, they are Nipron PCSA-300P-X2S unitsTypically, the CLIP packets for Keysight/Agilent gear don't include schematics for COTS parts, so if you suspect a dead power supply then I wouldn't bother chasing down a schematic. Rather, "thou shall check voltages"

author: Neuro
author_rank: Contributor
timestamp: May 04, 2022, 06:32:33 pm
content: Quote from: fourierpwn on May 04, 2022, 12:02:08 amThe E5070B has a regular PC ATX power supply, so it's not a problem at all.Internal tests are showing errors, coming from signal paths.

author: nctnico
author_rank: Super Contributor
timestamp: May 04, 2022, 06:45:00 pm
content: If you have an idea which module / signal path is defective then it should be possible to get it working by doing some reverse engineering -assuming that the defective chips aren't custom ones made by Agilent for internal use-. Judging from the service manual, there is an extensive test suite that should bring you very close to the location of the problem. With an RF generator and oscilloscope / spectrum analyser it is possible to follow the signal path and see where it goes wrong.
tla704 compact flash adapter  - Page 1
Forum section: electronics / testgear

author: rommac100
author_rank: Newbie
timestamp: May 03, 2022, 04:40:55 pm
content: So I recently acquired a tla704 logic analyzer and have been gradually repairing it and upgrading. It is fully working at this point after doing a rtc battery mod but I would like to swap out the hard drives to compact flash as those drives should soon. Any suggestions for compact flash to ide adapters? As the star tech model that I got did not seem to work with analyzer at all. Would not post and would spit out beep codes (didn't get a chance to look into the beep codes).Currently used compact flash adapter:StarTech.com 40/44 Pin IDE to Compact Flash SSD Adapter - IDE to CF Card reader - CF to IDE Converter (IDE2CF),Blackhttps://www.amazon.com/dp/B0026OYEEQ/ref=cm_sw_r_apan_i_VD58FBFAHKQ3YBDHXC32?_encoding=UTF8&psc=1Currently used compact flash:Verbatim 4GB CompactFlash Memory Card, 95188 Blackhttps://www.amazon.com/dp/B0009X3MNU/ref=cm_sw_r_apan_i_G5MGGFMP4JN735112DQX?_encoding=UTF8&psc=1
DIY Agilent 34970A Breakout box - Page 1
Forum section: electronics / testgear

author: felixsys
author_rank: Contributor
timestamp: May 03, 2022, 06:45:09 pm
content: Hello,Just to get more fun with my Agilent 34970A, I decided to build a breakout box. Maybe it can give you some ideasI really like the 34970A specially with the 34901A multiplexer but it's not always easy to deal with the wires...The breakout box has 15 channels connected to the 34901A module.7x VDC, 2x resistances, 1x frequency, 1x VAC, 2x temperatures and 2x current measurements.The goal was to have something the same size as the Agilent DAQ.I found a nice made in US enclosure at RS OnlineRS reference 237-4432and good quality Staubli banana sockets with solder termination of courseReference : 49.7043-22 (red) 49.7043-21 (black)I used a screened good quality CAT6 cable for the signals and 1mm silicon multi strand wires for the current measurement and I avoided a back connector just to have less loss and simple design.Total cost is 100$(I can send the drilling DXF file and the front panel sticker design if anyone wants...)Some pictures (Of course the keysight logo is there on the front panel just for fun)

author: free_electron
author_rank: Super Contributor
timestamp: May 03, 2022, 07:08:02 pm
content: cool ! and the right width too ! rackmount in 19 inch panel ( 34970 left, breakout box right... )i would have put old school HP logo.. non of that newfangled agikeylentsight stuff.
tektronix tds 360 - Page 1
Forum section: electronics / testgear

author: papele
author_rank: Newbie
timestamp: April 30, 2022, 03:26:59 pm
content: Good evening I have a tektronix TDS360 oscilloscope that after a while freezes. The key commands do not work. Maybe I should calibrate or update the firmware?

author: nctnico
author_rank: Super Contributor
timestamp: April 30, 2022, 03:38:24 pm
content: No. Check for leaky capacitors on the boards and the power supply.

author: papele
author_rank: Newbie
timestamp: April 30, 2022, 03:56:55 pm
content: i checked the electrolytics with esr test on the power supply. i noticed that by disconnecting the floppy controller it locks less. maybe you have to configure the main. do you know how to proceed? thanks

author: nctnico
author_rank: Super Contributor
timestamp: April 30, 2022, 04:19:24 pm
content: Did you check this thread?https://www.eevblog.com/forum/repair/pls-help-me-repair-tektronix-tds-380/Are there any failures in the self test? You can also try to reseat all the boards and connectors (but don't use contact spray!)

author: papele
author_rank: Newbie
timestamp: May 02, 2022, 07:50:37 am
content: there are no errors during the test. how do i update the firmware? thanks.

author: nctnico
author_rank: Super Contributor
timestamp: May 02, 2022, 04:41:42 pm
content: How long have you owned this oscilloscope? When did this problem start to show or did you buy it this way?I strongly doubt a firmware update will help; 'freezing' on older equipment usually points to an electrolytic capacitor or contact problem but it can be something entirely different as well. You need to troubleshoot this problem methodically. You wrote that disconnecting the disk drive makes the problem appear less. This makes the power supply the primary suspect. The service manual for this model should be available somewhere. See if there are voltage and ripple specifications in there for the supply rails and check whether these are within specifications.
Tek SignalVu software doesn’t get much attention here. Is there a reason? - Page 1
Forum section: electronics / testgear

author: 240RS
author_rank: Regular Contributor
timestamp: May 06, 2022, 09:55:55 am
content: Maybe my search was wrong, but I didn’t see to many talk about SignalVu, where to me, it seems a great tool when connected to Tek’s USB spectrum analyzers. License comes for free (basic version).I am using an XP based Agilent MXA, and I am happy it produces a (some sort of) spectrogram and has accuracy. But using SignalVu seems so much more modern to me.I am working with 2-30MHz baseband OFDM (powerline comms). Intermittent signals all the time. Having colored charts seems such an improvement.Or….. could I build similar charts using labview if I feed it with 250M IQ samples per sec? The latter was my plan actually. Long shot, but again, an MXA is not to pleasant to work with.Thanks

author: 240RS
author_rank: Regular Contributor
timestamp: May 06, 2022, 11:26:37 am
content: Example of what I am working with now:Horizontal lines are small bursts every 40ms. But I cannot measure anything on the spectrogram. Hence wish to go to something more modern.
High voltage amplifier (400V peak) for mains susceptibility tests - Page 1
Forum section: electronics / testgear

author: KlausKragelund
author_rank: Regular Contributor
timestamp: May 02, 2022, 11:14:07 am
content: HiI need to test a product for susceptibility, so mains notches, dips, various frequencies etc.The product is supplied from 230Vac, so peak voltage is 325V ac, power is 30W, and peak currents are in the range of 1AThe waveforms are generated with a function generator, but I need to boost the 10V output of the function generator to 325V peak (also negative 325V peak)I could use an audioamplifier, with ac couping on the input, and a 1:10 transformer on the output, but rise/fall times will be bad, and it will be softDoes anyone know of a +/- 400V amplifier that could be used for this?RegardsKlaus

author: Martin72
author_rank: Super Contributor
timestamp: May 02, 2022, 11:39:12 am
content: Hi Klaus,If its for use at your work (because of the price), you could have a look at this here:https://www.itechate.com/uploadfiles/%E4%BA%A7%E5%93%81%E5%8D%95%E9%A1%B5/IT-M7700-en.pdfI think, it would fulfill all your needs.Martin

author: KlausKragelund
author_rank: Regular Contributor
timestamp: May 02, 2022, 11:43:44 am
content: Quote from: Martin72 on May 02, 2022, 11:39:12 amThanks for the link. It covers my needs for sure. It is for work, but will probably not be using it so oftenOn the other hand, having it, I can do a standard test every time I do a power supply, so I think your suggestion is good, instead of fudging with equipment not meant to do the job

author: KlausKragelund
author_rank: Regular Contributor
timestamp: May 02, 2022, 11:47:01 am
content: Quote from: KlausKragelund on May 02, 2022, 11:43:44 amCrap. I just see now it can do DC mode also. Just last week I bought a DC voltage supply, and for the same price, I could have had this one with ac capability also....

author: joeqsmith
author_rank: Super Contributor
timestamp: May 02, 2022, 12:24:51 pm
content: We have one made by California Instruments. Arb is built-in.I've also used AE Techron.https://aetechron.com/

author: Martin72
author_rank: Super Contributor
timestamp: May 02, 2022, 12:53:19 pm
content: QuoteReturn the DC-only...At work we got two supplies from Pacific Power - It´s overwhelming what you can do with them, we lived the last years behind the moon..Pacific Power AFX Series
PROM image Fluke PM6685 frequency counter GPIB board - Page 1
Forum section: electronics / testgear

author: radko
author_rank: Newbie
timestamp: June 06, 2021, 12:39:51 pm
content: Hi,The vintage Fluke PM6685 frequency counter allows an optional GPIB interface card (option PM9626) to be added. The EPROM on the card should have a firmware version matching that of the main board. The one I have is running on v1.05B, but I have not been able to find a corresponding B-version firmware for the PM9626 GPIB card. Fluke opened two support tickets, but I don't think they will be searching their attics for this. Maybe someone here on the forum with this instrument is able to read the EPROM content and send an image file? Any firmware file for the PM6685 or PM9626 would be highly appreciated.Best regards,Radko

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: January 24, 2022, 09:03:01 am
content: Here is the content of my unit

author: rainbow
author_rank: Contributor
timestamp: March 04, 2022, 02:15:28 pm
content: Thank you Qw3rtzuiop!With that firmware (that matched the B letter of my main firmware) I can make the GPIB board using the schematics available in the service manual since the original PM9626 seems ﻿﻿﻿unobtainable.have a great weekend.

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: March 04, 2022, 02:52:59 pm
content: Sounds great.Good luck on that project.Have a nice weekend too!

author: rainbow
author_rank: Contributor
timestamp: May 02, 2022, 08:27:16 am
content: I made the GPIB board for PM6685. If someone is interested feel free to send me a PM.
Anritsu MS2721B / other non YIG spectrum analyzer block diagram or docs / parts - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: April 14, 2021, 01:30:18 pm
content: My MS2721B with LO error will be arriving shortlyIt seems that schematic or even block diagram for many Anritsu products may be unobtanium.Has anyone ever found any documentation for this family or, a block diagram for a non-YIG based spectrum analyzer. After watching the videos from Shahriar and others, I suspect that this unit does not have a YIG / YTO. Some failures of the crappy Micronetics VCOs have been found. These things look like an SMD design with 1960's TV set point to point wiring and a bucket of solder.I'd like to get a better understanding of how the 3 (or more) VCOs interact in their various RF source and conversion roles.I've heard excellent things about Anritsu support but doubt that they sell component level items. Any comment?

author: dj9ss
author_rank: Newbie
timestamp: May 01, 2022, 11:15:28 am
content: Hi,I acquired a MS2721B which also showed the notoriousVCO1 lock error.According to Shariar's video, I had a closer look on the Micronetics VCOs.Attached is a microscope picture of a large crack in a soldering joint inside one of thos VCOs.After resoldering, the unit works fine, and the lock error is gone.Regards, Jürgen
fluke 8846A usb to serial adapter - Page 1
Forum section: electronics / testgear

author: boful
author_rank: Contributor
timestamp: April 30, 2022, 10:30:16 am
content: Greetings..New Fluke 8846A out of the box, and can not get USB/Serial Adapter (Rev II) to work. Every time adapter is connected to USB port on a computer have the following messages:Windows has stopped this device because it has reported problems. (Code 43)A request for the USB device descriptor failed.Device USB\VID_0000&PID_0002\6&7711db8&0&6 was not migrated due to partial or ambiguous match.I have tried the adapter on three (3) computers running either Windows 10 home or Pro.Have installed other USB to Serial Adapters (FTDI and Prolific) with no problems.Could it be the adapter is defected ? New never used from Fluke or am I spinning and doing something wrong ?Can I use any serial to usb adapter with the FlukeView Software ? I do not have a gender bender at the presentto connect with the 8846A (why does Fluke have RS-232 pins on the meter in a male configuration).Thanks for any comments.

author: Andreas
author_rank: Super Contributor
timestamp: April 30, 2022, 10:40:33 am
content: Hmm,VID_0000 is a invalid value. So obvioulsly at least the EEPROM in the adapter has a problemThe correct VID/PID should be part of the .inf file of the driver package.with best regardsAndreas

author: boful
author_rank: Contributor
timestamp: April 30, 2022, 01:32:46 pm
content: greetingsthanks for response.Yes.. I found a null modem adapter with the correct gender matchingusing another FTDI USB / Serial adapter and yes the interface works !:-)

author: ci11
author_rank: Regular Contributor
timestamp: April 30, 2022, 02:38:45 pm
content: The 8846A only requires a null modem cable or adapter to connect to either FTDI or Profilic USB-to-serial cables, and not a gender changer without or in combo with a null modem device. If both are used, the null modem is literally nullified and it won't talk.

author: bdunham7
author_rank: Super Contributor
timestamp: April 30, 2022, 02:56:35 pm
content: I don't know if this is helpful, but I've attached the drivers that I'm using with an 8846A, a Fluke serial-to-USB cable and Windows 10. I recall having some issues getting it to work until I found and used these, but of course once it is working I forget all the details. HTH.

author: HKJ
author_rank: Super Contributor
timestamp: April 30, 2022, 03:03:55 pm
content: Why not use it with a network connection?I generally prefer network for my devices, this simpler to use when you assign fixed IP address to the devices.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 30, 2022, 03:14:24 pm
content: If it is based on a fake FTDI, some more recent drivers reset the eeprom content and could / can give this invalid VIDThere was an FTDI utility to repaid the VID string and bring back to life the adapter BUT you need to stop windows to update the drivers and use an older FTDI driver ...
Vitrek V61 AC/DC Safety Analyzer teardown - Page 1
Forum section: electronics / testgear

author: uoficowboy
author_rank: Regular Contributor
timestamp: January 13, 2014, 12:46:58 am
content: Hi - I have this piece of equipment passing through my lab, so I thought I'd tear it apart for you all. You can see specshere. See below for photos of the guts. The toroid transformer is a thing of beauty IMHO.On a side note - I have listed this beast on Ebay. If you're interested in purchasing it contact me as I will offer an EEVBlog discountThe first photo shows it with its cover off.Second photo shows the massive toroid.Third photo shows a board that I'm not sure of the function of - maybe a control board for the HV along with some sort of regulator or load?Fourth photo shows the high voltage board. I believe the big black thing is a HV relay. Behind it is a massive HV transformer.

author: uoficowboy
author_rank: Regular Contributor
timestamp: January 13, 2014, 12:47:43 am
content: More photos!First photo is just another look at the beast.Second photo is the high voltage section from the side - note that it consists of two stacked PCBs.Third photo is what I'm assuming to be the brains of the operation.Fourth and fifth photos show the power parts on the heatsink.

author: gwideman
author_rank: Contributor
timestamp: April 30, 2022, 01:48:20 am
content: Thanks @uoficowboy, those photos are useful!