hybridfree/eevblog-posts huggingface dataset:
Keysight promotion - 25% off DMMs - Page 1
Forum section: electronics / testgear

author: alexthe5th
author_rank: Contributor
timestamp: July 06, 2020, 04:09:02 pm
content: Just a heads up that Keysight has a promotion running for 25% off DMMs (enter promo code 7.012 at checkout) - just used it successfully to get $128 off a U1282A. It's not on their special promotions page, but there's a banner on the top of some of the DMM product pages. I can't find any more details about it, so I'm not sure when it expires.

author: besauk
author_rank: Contributor
timestamp: October 27, 2020, 02:19:57 am
content: Just used it today! Many thx.

author: Wytnucls
author_rank: Super Contributor
timestamp: October 27, 2020, 06:09:30 am
content: Are they giving them away or is the markup on multimeters ridiculously high?

author: besauk
author_rank: Contributor
timestamp: October 27, 2020, 04:02:23 pm
content: no, not giving them away... The discount is taken from the full retail price, which is indeed high, but not inconsistent with Fluke or other comparable makes. 25% off puts it in the realm of just mildly indecent, as opposed to grossly obscene.On a side note - ordered it at 6PM local time yesterday, and the included shipping (i.e. no incremental charge) yielded a delivery at my door before 11AM local time today. Quoted delivery was 2 days, so they blew that away. That was great fulfillment.

author: gslick
author_rank: Frequent Contributor
timestamp: October 28, 2020, 12:31:13 am
content: They had an even better promo a few years back when I bought mine. They had a buy 2 handhelds, get the 3rd free promo. I wanted both a U1282A DMM and a U1733C LCR meter. I ended up buying 2 U1282A DMMs and got the U1733C LCR meter for "free". There were also throwing in a free U5404A Remote Switch Probe with each U1282A, although I have never actually had a need to use that.I haven't seen a repeat of that promo since then.

author: besauk
author_rank: Contributor
timestamp: November 01, 2020, 02:35:53 am
content: Another happy surprise was getting access to the full calibration results online - the full set of applied/measured values. The paper cert that comes in the box is just the standard "Passed" with calibrator declaration. But the online pdf for my serial number has the real values. I have a couple of reliable standards and they are bang on with the calibration data.

author: JonM
author_rank: Unknown
timestamp: November 02, 2020, 03:08:53 pm
content: I just tried to use the code on a U1282A and it failed. Oh well, I did not need another DMM too badly but I would like to have the optically isolated USB interface. I'll standby for another offer.

author: besauk
author_rank: Contributor
timestamp: November 03, 2020, 08:11:50 pm
content: I think it may have only been good until 10/31. No doubt another will be along soon.
Differential probes - 101 question... - Page 1
Forum section: electronics / testgear

author: darkstar49
author_rank: Frequent Contributor
timestamp: November 03, 2020, 09:14:22 am
content: Sorry to bother with a probably stupid question, but as a software guy, I don't feel too much at ease with PSU troubleshooting, and I'd like to clarify some basics...I've got the PSU connected to an isolation transformer, and using a differential probe connected to a scope to make various measurements... my question is in fact whether I should be worried to use a second (or third..., or...) differential probe connected to the (obviously same) scope, for probing the (same) PSU ??I'm not too sure to fully understand the grounding implications when using several (diff) probes connected to the scope...Thanks in advance for any feedback !!

author: alm
author_rank: Super Contributor
timestamp: November 03, 2020, 10:39:12 am
content: A differential probe has two inputs, both of which have a high (MOhm) impedance to ground. So there should not be a problem connecting multiple differential probes to the same circuit. Just make sure to obey the voltage rating of all probes, and be mindful of the parasitic capacitance of the probes. I would not connect multiple differential probes to the gate of a MOSFET, for example.If the differential probes have a ground lead (not common on high-voltage differential probes), then you do need to be careful where and if to connect that ground lead.

author: Mechatrommer
author_rank: Super Contributor
timestamp: November 03, 2020, 10:51:29 am
content: Quote from: alm on November 03, 2020, 10:39:12 amthis will apply exactly like normal passive probe's ground lead.
Circuit of low-end switching lab power supply (Tacklife MDC01) - Page 1
Forum section: electronics / testgear

author: mcovington
author_rank: Regular Contributor
timestamp: June 25, 2020, 10:26:38 pm
content: Does anybody out there have a circuit diagram of the Tacklife MDC01 (which is probably sold under other names)? Or a similar low-end lab power supply (switching)?This is the one I have:https://tacklifetools.com/products/dc-power-supply-variable-switching-dc-regulated-power-supply-with-4-digital-lcd-display-reverse-polarity-high-temperature-protection-110v-115cm-alligator-leads-includedIt works fine -- I'm not needing to repair it -- but I'm always interested in knowing how my equipment works.

author: tautech
author_rank: Super Contributor
timestamp: June 27, 2020, 09:55:32 am
content: Looks very similar to a MCH K305D.Schematics attached in this post:https://www.eevblog.com/forum/testgear/cheap-variable-switching-power-supply/msg1240531/#msg1240531Another thread about these:https://www.eevblog.com/forum/testgear/mch-k305d-cheap-switching-lab-power-supply/

author: mcovington
author_rank: Regular Contributor
timestamp: June 28, 2020, 03:43:28 am
content: Thank you! I couldn't get a diagram from Tacklife -- they apparently don't build it, just label and sell it -- so I was hoping for diagrams of something similar (need not be identical). Very much appreciated!

author: mcovington
author_rank: Regular Contributor
timestamp: June 28, 2020, 03:50:44 am
content: That is not exactly the one, but it's definitely close enough to tell me how the designers think. The one I actually have has 4-digit displays and has a fan controlled by a thermostat (off or on, almost always off). So if a closer match turns up, I'll welcome it. But I'm already off to a good start. Thanks again.

author: SunnyDay
author_rank: Contributor
timestamp: July 13, 2020, 03:44:39 am
content: No schematic diagram, but some additional info.It's a hybrid design, with a switching pre-regulator followed by an linear final stage, very similar to the Peaktech 6225A, which was reviewed by "Electro Bob"https://www.electrobob.com/peaktech-6225a-review/One of his users posted a link to a reverse-engineered partial schematic of the control loophttps://www.dropbox.com/s/wj405m435snhx5f/Peaktech%206225%20A.pdf?dl=0And it looks identical to the HyElec model HY3005B, which has some teardown photos on this forum (text in Chinese),https://www.mydigit.cn/forum.php?mod=viewthread&tid=79335

author: mcovington
author_rank: Regular Contributor
timestamp: November 03, 2020, 04:11:00 am
content: Sorry it took me so long to get back. That (the Peaktech) is it, and the information is very helpful. THANK YOU!
Agilent U3606A software bug? - Page 1
Forum section: electronics / testgear

author: NikiG
author_rank: Newbie
timestamp: November 06, 2020, 06:16:15 am
content: Hello, i have U3606A with strange message after power ON - UPGr2, which remains until the power is turned off, so, could anyone tell me if the Sb - (Source board) version is normal to show 00.00? I guess this is a bug in the software of the microcontroller of the Power Source board uPD78F0545. All power supplies are checked, and are correct, the communication between the PS board and the measuring board is also OK, the self test passed without errors, if power of Sb is removed, or communication between Sb and main board is cut, all measurement functions work fine.Thanks & regardsNikiG

author: uski
author_rank: Frequent Contributor
timestamp: November 06, 2020, 08:37:35 am
content: https://doc.xdevs.com/doc/HP_Agilent_Keysight/English%20_%202013-04-05%20_%20PDF%209.48%20MB%20U3606-90013%20c20140711%20%5B287%5D.pdfPage 135Looks like you are in a special menuTry pressing Shift then Exit to exit the menu

author: NikiG
author_rank: Newbie
timestamp: November 06, 2020, 09:17:45 am
content: Thanks for your replay, but this combination do nothing, UPGr2 can't be removed, except "Shift + Utility" where instrument can display Utility Menu, the viewing and changing of parameters also is possible, after it, exit from Utiliy Menu is impossible.
I thikn I bricked ADS-1102CAL - Page 1
Forum section: electronics / testgear

author: Frozen001
author_rank: Newbie
timestamp: October 30, 2020, 06:14:53 pm
content: Tried to update FW on my ADS-1102CAL. File pulled from here:https://www.eevblog.com/forum/testgear/atten-lt-gt-siglent-conversionscrossflashes-do-you-still-have-problems/msg3058828/#msg3058828ATTEN_ADS1102C_2.07.02.10R5_ProdId_79_ISPFlash seemed to work fine. Power cycled when complete, now all buttons light up and display is blankAny chance of fixing this?

author: uski
author_rank: Frequent Contributor
timestamp: October 31, 2020, 04:06:59 am
content: I advise that you reply in the thread where you got the files from, so that people experienced with them will be able to help you.In parallel if you feel like it, you can disassemble your scope and see where the flash image is stored. If it is stored in a serial flash chip you could maybe get someone to get a dump and flash the dump to yours. Or maybe you can spot a JTAG interface and use that.But again, start by asking in the thread you linkedGood luck !

author: Frozen001
author_rank: Newbie
timestamp: October 31, 2020, 03:31:13 pm
content: Thanks hopefully someone can help out. Cracked the case and this old, so I am not really holding out much hope at this point, March 2011 date sticker on the inside sheet metal.
Who knows more: Extensive list of Brands and Models of APPA Multimeters - Page 1
Forum section: electronics / testgear

author: Cymaphore
author_rank: Regular Contributor
timestamp: November 05, 2020, 09:48:51 am
content: Hi,After a lot of Google research I just created an extensive list of brands and models of (often re-branded) APPA Multimeters:https://sigrok.org/wiki/APPA_Multimeters(The brands are listed on the individual Pages of the respective Series, all linked together in the table)Does anyone of you DMM fanatics around here know other brands or if I misscategorized or missresearched something?Best regards,Martin
Lecroy Wavejet 354A Firmware Update History - Page 1
Forum section: electronics / testgear

author: AJ3G
author_rank: Regular Contributor
timestamp: October 31, 2020, 02:42:33 pm
content: All:Does anyone have a link that describes the firmware history of the 354A? If not does anyone have general knowledge of when Version 2.05 came out, and what it addressed?Rich
weird issue with UNI-T UTG962 - Page 1
Forum section: electronics / testgear

author: ab#FFFF
author_rank: Newbie
timestamp: October 30, 2020, 02:23:37 pm
content: Hi All,I while ago I brough an UNI-T UTG962 signal generator (from UNI-T aliexpress store). It works but I have a weird issue: on channel 2 I have to set the double value on amplitude in order to get the required output. For example if I need 5Vpp I have to set 10Vp; this happened for any wave forms, any amplitude at any load impedance. Channel 1 works well.I've contacted the company and waiting for their feedback.Meanwhile I'll be very glad to hear your input on how to fix this issue.Thanks and Most Appreciated,Best Regards,#ab

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 30, 2020, 07:56:17 pm
content: 1) is your scope attenuation setting at 1X?2) do you put 50 ohm termination near DSO?3) CH2 is HighZ on your UTG962?

author: ab#FFFF
author_rank: Newbie
timestamp: October 30, 2020, 09:00:50 pm
content: 1. scope attenuation is 1x2. DSO ia set to high Z impedance (1Mohm).3. CH2 is HighZ on UTG962 (and there is no amplitude limit set).Anyway, CH1 behave in normal way. If the amplitude is set to 5Vpp with an offset of 2.5V, on the scope I see a signal with 5Vpp amplitude and 2.5 offset.On CH2 in other hand, I have to set the double value (10Vpp) in order to see 5V at the output. If I set 20Vpp on CH2 I see a 10Vpp signal on the scope... very consistent (is not limited by the output seen impedance). The major problem is: I cannot exceed 10Vpp output on CH2, on high impedance, because the amplitude setting is limited to 20Vpp.thanks,#ab

author: ab#FFFF
author_rank: Newbie
timestamp: October 30, 2020, 10:29:50 pm
content: I think that I figure out... The MODE (modulation was selected). I deselect-it for CH2 and now everything is fine.
Manuals for legacy HP equipment on Keysight page not working - Page 1
Forum section: electronics / testgear

author: tkamiya
author_rank: Super Contributor
timestamp: October 28, 2020, 05:31:13 pm
content: For quite some time now, HP/Keysight does not appear to offer documentation for legacy hardware anymore. There is a header/title page, then go to "Document Library" link, then list of manuals shows up. If I actually click one, "Sorry - the page you requested is not found". A while back, it asked for login and I enter that - then "Sorry..." again.It seems a sloppy job for HP if it wanted to remove manuals. Why go just half way? Am I doing something wrong? Up until a year ago or so, all of this worked just fine.I don't need an advice for where to get them as I already have them. I'm just interested in finding out whatever happen to Keysight site.

author: dl6lr
author_rank: Frequent Contributor
timestamp: October 28, 2020, 07:04:06 pm
content: I observed another issue with Keysight some weeks ago: After request to create an account to load an app note, I did so and got the confirmation email. Trying to sign on however, the password provided was not accepted, and changing it (several times) thru "forgot it" did not work either.Regards, Bernd

author: Tomorokoshi
author_rank: Super Contributor
timestamp: October 28, 2020, 07:58:11 pm
content: I go to the main Keysight page and search for the equipment by model number:https://www.keysight.com/us/en/home.htmlDoes this return different results?

author: tkamiya
author_rank: Super Contributor
timestamp: October 30, 2020, 02:23:49 am
content: No, same.Try looking up 8568b. It goes successfully until list of documentations are listed. Once you try to click on the list and retrieve the document, it errors out.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: October 30, 2020, 02:41:13 am
content: Of the 13 files listed I was able to download everything except:RF Preselector, 20 Hz to 2 GHz for the 8566B or 8568B Spectrum Analyzer Data Sheet8568B Spectrum Analyzer Data Sheet

author: tkamiya
author_rank: Super Contributor
timestamp: October 30, 2020, 02:54:25 am
content: Still does not work for me. Can anyone else try it?

author: Tomorokoshi
author_rank: Super Contributor
timestamp: October 30, 2020, 03:58:51 am
content: Have you tried a different browser? VPN?

author: Kean
author_rank: Unknown
timestamp: October 30, 2020, 09:46:32 am
content: I had the same results. I succesfully downloaded all but those 2 files which returned "No Search Results Found".
SOLVED: Problem with window trigger on SDS1104X-E - Page 1
Forum section: electronics / testgear

author: torquil
author_rank: Regular Contributor
timestamp: October 30, 2020, 05:42:12 am
content: Hi! I'm using a Siglent SDS1104X-E with the newest firmware: 6.1.35R2. The problem is that nothing happens when I try to adjust the upper and lower value parameters for the window trigger, using the Adjust-encoder. Nothing happens to those values when I twist the knob. Anyone else have this problem?I can change between the upper and lower value using the softbutton beneath, and the underline will alternate between the upper and lower value to indicate which parameter is selected for adjustment, but I am not able to change any of the values. The adjust encoder works fine for everything else on the scope.Best regards,Torquil Sørensen, Norway

author: rf-loop
author_rank: Super Contributor
timestamp: October 30, 2020, 05:58:30 am
content: Quote from: torquil on October 30, 2020, 05:42:12 amWhat is "adjust encoder", do you mean Universal Knob or what "adjust encoder" - there is many adjust encoders in front panel....User manual (version UM0101E-E03C) page 74 position 5.Did you follow Exactly this as can read in manualQuoteIf you follow it perfectly and it do not work like manual tell, after then please tell perfectly what position in this manual text fails.Sorry I can not just now test but previously I remember I have tested it and it works but I think FW was 6.1.33.This time I was writing some bit more depth instructions how to use different triggers but it was never ready before I trawel far from my homeland and this material is not here with me..So if it do not work as manual say, then perhaps some others can check it with running scope.

author: torquil
author_rank: Regular Contributor
timestamp: October 30, 2020, 06:17:50 am
content: Quote from: rf-loop on October 30, 2020, 05:58:30 amThe problem was that I was using the knob that I use for most of the other changes to other parameters, i.e. the "intensity / adjust" knob, not the "trigger level" knob... Not using the correct knob would certainly explain why I didn't work :-) Sorry about the noise. Thanks!
Rohde & Schwarz RTB2002 / RTB2004 question: importing CVS in pattern generator - Page 1
Forum section: electronics / testgear

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: October 28, 2020, 05:14:28 pm
content: In theirRTB2000 data sheet, R&S write that (emphases added):QuoteThe R&SRTx-B6 option data sheet, for the RTB2000, RTM3000 and RTA4000 oscilloscopes, says on its first page (emphases added):QuoteBut I cannot find no way to import 4-bit patterns in CSV format into my RTB2004 (firmware 2.300) with option RTB-B6 installed. Cannot find this in the manual either.Has anyone been able to do so successfully? And willing to share how it is done?Thanks!

author: egonotto
author_rank: Super Contributor
timestamp: October 29, 2020, 03:31:37 am
content: Hello,it seems that this is an error.Perhaps they copied "Waveforms and patterns can be imported as CSV files or copied from oscilloscope waveforms" from an other place.You can ask Rohde&SchwarzAn other error is:Key specifications R&S®RTB2000 | R&S®RTM3000 / R&S®RTA4000Signal forms frequency ranges (arbitrary)max. 10 Msample/s; 32k pointsmax. | 10 Msample/s; 32k pointsSample rate is 250MS/s and sample memory is only 16kS for the RTB2000The max frequency for arbitrary is 10 MHz.Best regardsegonotto

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: October 31, 2020, 04:41:59 pm
content: Dear all,Since the recent 2.300 firmware update repaired the import function for *.SCP import, I thought I could also make a little tool to have user-provided bit patterns translated into that device-specific format.Attached is an Excel spreadsheet that does this. It's very basic, really, but does what it supposed to do, and makes missing *.CSV import less of an issue.Hope this little tool can serve others as well!RTB2000 pattern generator V1.0.xlsx(160.81 kB - downloaded 190 times.)
Tek P6418 pod/probe - Page 1
Forum section: electronics / testgear

author: mmx01
author_rank: Contributor
timestamp: October 29, 2020, 10:46:14 pm
content: Hello All,I am working on a project which requires more than 64 LA channels. I have good old TLA714 with 7N3 (102 channels max) but never needed more than 4*P6418 pods. Buying two additional ones just for one project seems an overkill so I am looking to build my own.Done some measurements and it looks like these are only having 20kOhm resistors on data lines. Is there anything else there? It shows some capacitance in pFs perhaps parasitic but would be strange to see decoupling capacitors on data lines to ground in an LA application.Matching cable length etc. won't be an issue and since they use DIN 41651 sockets easy to plug-in.Regards,Mariusz
Fake Hantek ? - Page 1
Forum section: electronics / testgear

author: 9H1LO
author_rank: Newbie
timestamp: October 28, 2020, 11:55:41 pm
content: https://www.aliexpress.com/item/1005001645423986.html?spm=a2g0o.cart.0.0.656b3c001gbHrE&mp=1Has anyone ever seen this model ? does not exist on Hantek website

author: ralphrmartin
author_rank: Frequent Contributor
timestamp: October 29, 2020, 07:13:40 pm
content: Looks OK to me. You can buy it herehttps://detail.tmall.com/item.htm?id=629248946329in China, from what claims to be the Hantek Hardware Flagship Store,and also from jd.com herehttps://item.jd.com/10023718415311.html
Fluke 87V Max and NiMH batteries ? - Page 1
Forum section: electronics / testgear

author: btspce
author_rank: Contributor
timestamp: October 11, 2020, 01:20:26 pm
content: Just wanted to check if someone has tested the Fluke 87V Max multimeter with NiMH rechargeable batteries or do you get the "bAT" warning with these ?Tried to google it and found only one person who commented with a Fluke 28-II where it didn't work.Would prefer if anyone with a Fluke 87V Max could test and report back as there could have been small adjustments on the newer board revisions compared to the 28-II..Even better if someone could check at which voltage the "bAT" warning triggers.

author: BILLPOD
author_rank: Frequent Contributor
timestamp: October 11, 2020, 01:46:15 pm
content: My Fluke 189, with the C-Cell adapter works very well on sub-C NiMH batts. I recently converted so I don't know their longevity yet

author: btspce
author_rank: Contributor
timestamp: October 19, 2020, 11:27:18 am
content: Anyone with a Fluke 87V Max who can test it with rechargeable batteries and report back?

author: MiroS
author_rank: Regular Contributor
timestamp: October 19, 2020, 04:12:59 pm
content: Quote from: btspce on October 19, 2020, 11:27:18 amFluke 28 II works form with IKEA rechargeable batteries, no low battery indicator after two weeks.She should be almost identical to Max.

author: MiroS
author_rank: Regular Contributor
timestamp: October 19, 2020, 04:16:32 pm
content: Quote from: MiroS on October 19, 2020, 04:12:59 pmI should add that rechargeable batteries are a bit too big for battery compartment,case is a bit bent, so it may be not water resistant, I will be not testing this

author: btspce
author_rank: Contributor
timestamp: October 20, 2020, 10:37:51 am
content: Thanks for the info MiroS !I have a 87V Max on order now but they are out of stock currently. I will update this thread when I get it for future reference.

author: btspce
author_rank: Contributor
timestamp: October 29, 2020, 09:05:48 am
content: Just got the Fluke 87V Max.IKEA AA NiMH rechargeable batteries was tested and they work. The batteries are not too big and fits the battery compartment without problems.
Keysight N2756 16 channel MSO cable for for DSOX2002 with MSO option ? - Page 1
Forum section: electronics / testgear

author: Saskia
author_rank: Super Contributor
timestamp: October 29, 2020, 05:33:35 pm
content: Hi,quick question and pardon my ignorance.can I use the 16 channel version (N2756A) instead of a N2755A (8 channel) on a DSOX2002 ?I have the N2756 on my bench, I do not own the N2755A.Thanks.

author: gslick
author_rank: Frequent Contributor
timestamp: October 29, 2020, 07:26:39 pm
content: While I haven't been able to find any documentation yet to confirm this, my assumption is that an N2755A 8-Channel MSO Cable Kit is essentially just a half populated N2756A 16-Channel MSO Cable Kit, and an N2756A 16-Channel MSO Cable Kit would work fine in a InfiniiVision 2000 X-Series MSO, just ignore the 8 unused channel leads.

author: Saskia
author_rank: Super Contributor
timestamp: October 29, 2020, 08:00:06 pm
content: that would be my guess as well. Will probably just ask Keysight tomorrow (just to make sure)
Non-contact voltage tester - Page 1
Forum section: electronics / testgear

author: jmw
author_rank: Frequent Contributor
timestamp: October 28, 2020, 02:52:48 am
content: Does anyone have one of these that they actually like? All of us occasionally need to do electricalstuff in addition to electronics, and it seems like the common element in reviews of NCVTs are people complaining how each model is uniquely garbage. My preference would be for always-on with an audible option, so that rules out the Fluke testers. I have a cheapie right now but the audible alarm is flaky, so I'm looking to replace it.

author: exmadscientist
author_rank: Frequent Contributor
timestamp: October 29, 2020, 03:46:34 am
content: The Fluke ones really are awful. I bought one figuring it was hard to go wrong with Fluke... nope, it's easy, just buy their non-contact crud. I managed to unload it on a colleague. I now have aKlein NCVT-2that pretty much just works and seems to be perfectly fine for the little use it gets. The Klein site says it's out of production (though seems to be in the channel), but the NCVT-2P looks much the same, except IP54 rated.
ADC used in various DSOs - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: October 28, 2020, 06:04:53 pm
content: I've been looking for the ADCs used in the SDS2104X Plus DSO and couldn't find any details. Dave's teardown didn't identify the ADCs.Anyone know what ADC is used, and maybe also what other DSOs are using?Best,

author: TurboTom
author_rank: Super Contributor
timestamp: October 28, 2020, 06:17:04 pm
content: Intermediate range Siglent / mature Rigol: MXT2001 (Rigol relables them RAD1082A) which is an amost exact copy the TI ADC08D1000.Current Rigol models - Proprietary?Entry Siglent / Rigol models: Analog (Hittite) HMCAD1511 -- Also to be found in many other entry level scope brands.
Symmetricom Timesource 2500 / 2700 software - Page 1
Forum section: electronics / testgear

author: little.tesla
author_rank: Regular Contributor
timestamp: November 27, 2019, 06:48:42 pm
content: Hello,does anybody have a copy of the software called "BTMon" (e.g., "BTMon_version_276.exe") and was available on the web in the past. But currently it dissapeared. I have a Timesource 2500 laying around and would like to play a bit with it.Thanks in advance,Dimce

author: little.tesla
author_rank: Regular Contributor
timestamp: December 01, 2019, 02:54:05 pm
content: While waiting for a reply, this sister post inspired me to take some pictures from its internals:https://www.eevblog.com/forum/testgear/symmetricom-timesource-2700-cdma-reference-clock-teardown/The Time Source 2500 is almost idendtical to the TS2700 except for the GPS module and SRS rubidium oscillator.Pictures Part 1

author: little.tesla
author_rank: Regular Contributor
timestamp: December 01, 2019, 02:58:11 pm
content: The most interesting thing is that the GPS receiver is based on the MAX2740 Complete GPS Receiver with On-Chip Frequency Synthesizer.All of the other HW peaces are identical to the TS2700 unit.Pictures Part 2

author: chick0n
author_rank: Regular Contributor
timestamp: October 28, 2020, 02:47:39 pm
content: I found it.Thanks to Bruce KG6OJI, from the time-nuts mailing list.
TL866II programmer add by user - Page 1
Forum section: electronics / testgear

author: Blisters on my fingers
author_rank: Newbie
timestamp: October 29, 2020, 05:02:29 pm
content: I was thinking it might be handy to use that "ADD BY USER" feature, since the programmer allows testing of 74xxx devices. Why not add by user a test for a ATF22v10 programmed device? Or, perhaps some other IC not listed in the included list? Problem is, I can't find any documentation on how to create such a test, to add. My post here is to ask if anyone has knowledge, or information on this.

author: MadTux
author_rank: Frequent Contributor
timestamp: October 29, 2020, 06:12:13 pm
content: There is already something like that:https://www.mikrocontroller.net/topic/499829Haven't tested it though, but from the description, it's pretty much what you're looking for.
DG2020A and 3420 Data Generator Pod Cable? - Page 1
Forum section: electronics / testgear

author: coppercone2
author_rank: Super Contributor
timestamp: October 27, 2020, 06:58:52 pm
content: Does anyone know the pinout required by the IDC 2x25 pin cable that connects the DG2020A data generator to the P3420 Variable output Pod? Does a standard cable work?

author: coppercone2
author_rank: Super Contributor
timestamp: October 27, 2020, 08:51:28 pm
content: The manual says W600 on the cable, I dunno if that means anything
Playing Doom on MSO5074 - Page 1
Forum section: electronics / testgear

author: LootMaster
author_rank: Regular Contributor
timestamp: October 27, 2020, 05:02:35 am
content: So I was thinking...Next time my buddy comes over, I'll be like...Ok, I have something important to show you that I found out...Then I'll open the scope, all serious, then I'll proceed to play doom.No seriously, how do you install it, and how do you hack this thing.Does somebody have a few lines with required details easy instructions please?? That other thread is all over the place.Firmware: 01.03.00.01Hardware: 01.01.000

author: ledtester
author_rank: Super Contributor
timestamp: October 27, 2020, 06:43:14 am
content: This video:https://youtu.be/m2JOs0Aldq0refers to tis github repo:https://github.com/Spritetm/prboom-mso5k

author: LootMaster
author_rank: Regular Contributor
timestamp: October 27, 2020, 11:30:44 am
content: Actually I dont care about that...Doom.What mouse clicks must I do to hack my scope?I never ever installed Linux nor went into cmd things.

author: LootMaster
author_rank: Regular Contributor
timestamp: October 27, 2020, 09:31:10 pm
content: Please...Help...me

author: maginnovision
author_rank: Super Contributor
timestamp: October 27, 2020, 09:46:02 pm
content: Nobody here can provide the help you need I'm afraid. You seem to need someone to come to your house and hold your hand while they do the work.

author: LootMaster
author_rank: Regular Contributor
timestamp: October 27, 2020, 10:45:37 pm
content: Oh no you can help...That is the attitude of Sodom and Gomorrah.When you see a poor beggar, you see God who is poor and begging.Plz...help...me

author: maginnovision
author_rank: Super Contributor
timestamp: October 27, 2020, 11:12:10 pm
content: You've convinced me. Send me your scope and I'll get it done asap.

author: ledtester
author_rank: Super Contributor
timestamp: October 27, 2020, 11:27:14 pm
content: Quote from: LootMaster on October 27, 2020, 11:30:44 amYou don't have to install Linux - just follow the instructions in the github repo to get to a command prompt. There are no mouse clicks involved -- you just ssh into the machine.
DSO5102P, increase and/or add memory, it is possible? - Page 1
Forum section: electronics / testgear

author: gtr
author_rank: Contributor
timestamp: October 25, 2019, 01:59:11 pm
content: Hi everyone,I have a Hantek DSO5102P oscilloscope, the maximum memory is 40k. I would like to know if it is possible to increase and/or add memory.Thank you!

author: esrtester
author_rank: Newbie
timestamp: October 26, 2020, 03:56:03 pm
content: I just ordered one myself a few hours ago as they are discounted to £176 on amazon uk, and I've been going nuts for days looking at all the reviews of ones I could buy as my first digital scopeIn my research, I came across something that could be relevant - that the chip most of these budget scopes use has internal memory - and budget scopes make use of that limited amount of memory instead of the manufacturer adding their ownI think you will need to get hold of a schematic of the next model up that has more memory, and the same chips, and see how the memory is implimentedHowever, the newer designs use better chips and the DSO5102P is an old design, so I think it will be difficult to upgrade - myself, I'm getting a USB logic analyzer for the more advanced stuff

author: gtr
author_rank: Contributor
timestamp: October 27, 2020, 06:09:26 pm
content: Hello, thank you very much for this information. I paid mine $ 322.00 CAD = 187.41 UK. For now it suits me perfectly.It is true that there are a lot of digital oscilloscope choices now. There are now touchscreen oscilloscopes.
Resusetation of a Tech TE-20D signal generator - Page 1
Forum section: electronics / testgear

author: AaronB
author_rank: Contributor
timestamp: October 27, 2020, 02:25:09 pm
content: I snagged a Tech TE-20D signal generator from a flea market for €10 and want to get it running. It looks pretty clean inside, but probably not wise to plug it in without some preflight checks. The only danger area I see are a couple of 20uF electrolytics, which I will replace. There are a few other ceramics which I could speculatively change but probably not worth it. The resistors look good. Anything else to consider before I fire it up with 100W bulb in the mains supply as the first test?I'd also like to add a proper earth to the outside case and chassis, will that be a problem?

author: lordhex
author_rank: Newbie
timestamp: October 27, 2020, 04:40:03 pm
content: Don't know if you had a chance to download the manual, here it is attached.Looking at the schematic diagram - I would check the transformer primary and secondaries (there are two - one high voltafe 120V and one for filaments 6.3V) with an ohmmeter first. Primary should have a higher resistance than the secondary.If you have a rheostat, start with lower voltage - I would power it on like that first. If a fuse is blown, try to find out why before replacing it.Anything you do, PLEASE be careful with the MAINS voltage.Do not work alone, make sure there is someone else around you when you connect equipment to the mains power with the case open.

author: AaronB
author_rank: Contributor
timestamp: October 27, 2020, 05:21:52 pm
content: Thanks @lordhex for the manual, the schematic will be very useful. It is actually an EU unit, so it is 230V primary. And I am used to working with mains voltage - just finished dancing around a 2KV supply while fixing my oscilloscope.Having just removed the 20uF caps, I find they measure at 30uF. Out of spec, but in a good way I guess. Probably worthwhile replacing anyway.
Multimetro METRAHIT - Page 1
Forum section: electronics / testgear

author: rocchini.giovanni@gmail.c
author_rank: Newbie
timestamp: October 26, 2020, 10:42:05 am
content: I.I have a Gossen Metrawatt Metrahit model multimeter.Defects for some functions: switch off programming.Can anyone help me with the wiring diagramsThank you.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 26, 2020, 11:08:32 am
content: there are soooo many metrahit model, which one? we fixed our metrahit without knowing any wiring diagram (cleaning off battery leak damage)

author: rocchini.giovanni@gmail.c
author_rank: Newbie
timestamp: October 27, 2020, 05:00:06 am
content: Thanks for your help.The model is TRMS Isolation Ioso Multimeter.In fact, the loss of a battery affected some components by deleting even the initials.I tried cleaning it with alcohol and acetone, but I got nothing.Best regards.

author: Wytnucls
author_rank: Super Contributor
timestamp: October 27, 2020, 08:02:46 am
content: As far as I know, Gossen doesn't release much information about their multimeters. The METRAHIT ISO is expensive and worth a decent repair job. Send it to their repair facility, even if it is on the pricey side. Hopefully, you may get a new calibration in the process.https://www.gmc-instruments.de/en/services/services/service-center/
A short video starring my Keysight 34461A - Page 1
Forum section: electronics / testgear

author: Rasterist
author_rank: Contributor
timestamp: October 26, 2020, 06:05:08 am
content: One of my lockdown-compelled projects:https://youtu.be/A1GcUizxYu0.I'm thinking of working my way through my entire lab like this, instrument by instrument.
R&S RTB2004 70MHz with almost all options for 2k€ (Batronix, Education) - Page 1
Forum section: electronics / testgear

author: MaxZ
author_rank: Contributor
timestamp: October 25, 2020, 01:14:06 pm
content: Hi everyone,Batronix seems to have a new education (!) bundle for the RTB2000 series. It includesRTB2002/RTB2004 70 MHz bandwidthRTB-K1 – I²C/ SPI T&DRTB-K2 – UART/RS232 T&DRTB-K3 – CAN/LIN T&DRTB-K15 – History & Segmented Mem.RTB-K36 – Freq. Response AnalysisRTB-B6 – function generatorIt misses the logic analyzer and the bandwith upgrade(s).Price: 1380€ (2 Chn) or 2080€ (4 Chn) incl. 16% VAT. That's even "cheaper" than the base price without any options for those models (1520/2320€).Link:https://www.batronix.com/shop/oscilloscopes/Rohde-Schwarz-RTB2004EDU.htmlKind regards,Max

author: Rich@RohdeScopesUSA
author_rank: Frequent Contributor
timestamp: October 26, 2020, 12:56:14 am
content: Technically these don't launch until November 1st, but since there is a thread on them...A few more details (some specific to the US - like the 20% EDU discount):RTB2002EDU: $1,490. After the 20% EDU discount they will be ~$1,195RTB2004EDU: $2,240. After the 20% EDU discount they will be ~$1,795RTC1002EDU: $1,125. After the 20% EDU discount they will be $900.As mentioned, they all include PK1 (all serial decode/trigger options, history mode, bode, AWG). Base bandwidth. While the MSO cable is not included, moving forward, we'll be enabling MSO in all our scopes - you will still need to purchase the probe (same cost), but now they can be moved between scopes. Not that big of a change for an individual user, but for a teaching lab it will be a huge improvement (they can buy say five MSO cables, keep them in a drawer and then hand them out to a bench as needed).One other tidbit (and this might be specific to the US/Canada - not sure it's available in other countries) - we allow students access to the EDU discount. They only need to supply one of our distribution partners a copy of a valid student ID.Let me know if there are other questions.-Rich
5mm ground spring to suit Keysight N2863B - Page 1
Forum section: electronics / testgear

author: TomS_
author_rank: Frequent Contributor
timestamp: October 25, 2020, 09:06:58 pm
content: Hi all, does anyone know of a source of 5mm ground springs for use on a Keysight N2863B probe?I see plenty of them on ebay for Tek probes, but only up to 4.5mm? 5mm springs seem to be like hens teeth, unless I want to pay ridiculous prices for official ones ($8-9 for a pack of 2)...Cheers!

author: bdunham7
author_rank: Super Contributor
timestamp: October 25, 2020, 09:10:29 pm
content: https://app.caltestelectronics.com/product-list/product-page/view/CT2714
GPIB commands for PM6676 - Page 1
Forum section: electronics / testgear

author: nnills
author_rank: Contributor
timestamp: October 24, 2020, 04:21:02 pm
content: Hi,I am in possession of a Phillips PM6676 frequency counter. It is equipped with the PM9696 GPIB module. I am unable to find a list of commands. Could someone point me to where to look or send me the list out right?Thanks in advance,Nils

author: picburner
author_rank: Frequent Contributor
timestamp: October 24, 2020, 04:45:21 pm
content: Here, in attachment, I have satisfied you:

author: Kibabalu
author_rank: Regular Contributor
timestamp: October 24, 2020, 05:50:10 pm
content: Thank you, it's the same module used in my PM6671 Timer/Counter.
"AstroAI" DMM backlight/power off hack confirmed working  - Page 1
Forum section: electronics / testgear

author: eti
author_rank: Super Contributor
timestamp: October 25, 2020, 03:41:34 am
content: I have a rebadged model of this DMM:https://www.amazon.co.uk/AstroAI-Multimeters-Capacitance-Transistors-Temperature/dp/B071JL6LLL/ref=mp_s_a_1_2?dchild=1&keywords=5000+trms&qid=1603510384&sr=8-2... mine being this one:https://www.amazon.co.uk/gp/aw/d/B07RC26XL7?psc=1&ref=ppx_pop_mob_b_asin_title... and I can confirm that the EEPROM hack to disable backlight timeout and auto power off, work on this DMM as per the instructions on Kerry Wong's site:http://www.kerrywong.com/2016/03/19/hacking-dtm0660l-based-multimetersAs for RS232 output, I've yet to get that working, if at all, but I just wanted to share this with you, as it's a nice cheap meter and works well.Take care.
Clearance Siglent SDS1104x-e: worth it? - Page 1
Forum section: electronics / testgear

author: NicholsMatt
author_rank: Contributor
timestamp: October 13, 2020, 06:19:06 pm
content: Hi all,I've been planning on buying a Siglent SDS1104x-e for a while now. I recently saw that Siglent has one in their clearance store for $50 off, new with a 3 year warranty, however, it has an expired calibration certificate. From what I can tell the unit is not specifically out of calibration, they just can't certify that it isn't. Would this be worth it?A little about me: I'm a 2nd year (sophomore) EE student in the US. I already have a Tektronix 2215 that has been serving me well, though I am starting to want the features of a digital scope (decoding, capture, easier measuring, etc.). I can't imagine I will be doing anything super fancy that I would require perfect calibration. Though I do plan on growing into this scope so I don't want this to become a hinderance later on just to save $50. From the reading I have done here this seems to be a scope that will fit my needs quite well, but if there is a scope I have not considered I'm all ears.Thanks for your time!The link to the store page:https://siglentna.com/product/sds1104x-e-100-mhz-new-exp-cal-clearnace/

author: tautech
author_rank: Super Contributor
timestamp: October 13, 2020, 06:30:18 pm
content: Welcome to the forum.I have a pre-production SDS1104X-E that didn't come with any Cal sheet that I received as part of the beta tester scheme. In all those years since I have no reason to doubt its accuracy.But hey if you are tempted grab it or as has been posted here, Siglents Amazon shop are doing a 15% special on them too:https://www.eevblog.com/forum/testgear/usa-amazon-prime-day-15-on-siglent-test-gear/

author: Fungus
author_rank: Super Contributor
timestamp: October 13, 2020, 06:32:34 pm
content: I wouldn't worry about the calibration certificate, these devices auto calibrate.You actually need to recalibrate whenever there's a change of temperature, eg. summer/winter but most people don't even bother doing that. Oscilloscopes are used for looking at the shape of things, not for making very precise voltage measurements.nb. Those certificates are mostly for companies that need to point to pieces of paper when lawyers appear.

author: NicholsMatt
author_rank: Contributor
timestamp: October 13, 2020, 06:39:29 pm
content: Thank you both! Great heads up on the prime day deal. I went ahead and grabbed one. Thanks again! Hopefully I'll be back soon with some more questions

author: uski
author_rank: Frequent Contributor
timestamp: October 16, 2020, 03:30:49 am
content: Quote from: NicholsMatt on October 13, 2020, 06:39:29 pmAwesome, happy that it helped someone ! (I am the one who posted the deal)Tautech, who do I have to get in bed with to get a beta tester oscilloscope/multimeter ?

author: NicholsMatt
author_rank: Contributor
timestamp: October 23, 2020, 03:17:06 pm
content: Many thanks! Glad I stopped here for advice. Very happy with it! Named it Marty and my old Tek scope Doc (Dave would probably be proud)
VSG60A - Page 1
Forum section: electronics / testgear

author: electrolust
author_rank: Unknown
timestamp: September 09, 2020, 12:46:32 am
content: Anyone have this and have complaints? Specs look great for the price. Close-in phase noise better than products twice the cost. Too bad no external I/Q input, but as long as you can generate a CSV you can import it, so that seems ok.Anyone have this and doesnothave complaints? There's zero talk about it on the forum.

author: KE5FX
author_rank: Super Contributor
timestamp: October 23, 2020, 11:01:07 am
content: I've had my VSG60A for about 8 hours now. Does what it says on the box. Signal Hound markets it as a 'vector signal generator,' which is what I currently need it to do, but in reality it appears to be a very competent general-purpose signal generator.A CW signal at 100 MHz almost meets the HP 8662A perf limits:Big twoso far. The only thing that's tripped me up is that if you connect an external 10 MHz reference, you have to restart the software. Otherwise the 'Ext Ref' button won't show up at all... and if you don't press that button, some artifacts will result.Of course, being effectively a software-defined radio transmitter, it's not meant to compete with dedicated signal generators when it comes to specs like SFDR, absolute amplitude accuracy, or RF leakage at high attenuation levels. But my initial impression is that it's better than it has to be. They've done a good job on the basics, and you sure can't argue with the price.
Repairing Tektronix p7240 probe - Page 1
Forum section: electronics / testgear

author: merckhung
author_rank: Newbie
timestamp: October 23, 2020, 06:22:34 am
content: Hi everyone,I am new to the forum, but I have been interested in repairing Tektronix TDS7000 series and high-speed activate probes (read about a few articles).Recently I bought a p7240 probe from eBay at a fair price. The owner said the probe is intermittent and noisy (I thought it was acoustic, but later I realized it was actually referring to the signal noise floor)So, I unscrew the preamplifier box, the first sight is a tiny black wire floating around in the box.I am not sure did I accidentally pulled it off, or it fell off itself. Does anyone know where this black wire should connect to?I have been inspecting the pcb board and the gold connector carefully, but could not find any suspicious point this wire might be connected to before it came off.Thank you, I would appreciate that.Br,Merck

author: merckhung
author_rank: Newbie
timestamp: October 23, 2020, 06:33:03 am
content: Btw, I found a few datasheets for chips on its pcb board.OpAmphttps://www.analog.com/media/en/technical-documentation/data-sheets/111214fb.pdfpotentiometerhttps://www.renesas.com/us/en/www/doc/datasheet/x9408.pdfEEPROMhttps://www.st.com/resource/en/datasheet/m24c02-w.pdfRegulatorhttps://www.ti.com/lit/ds/symlink/lm317m.pdf?ts=1603369627471&ref_url=https%253A%252F%252Fwww.google.com%252F

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 23, 2020, 06:42:40 am
content: i have one just dangling like that. just opened it many months ago to snap pictures whats inside, never got a chance to test or fix it (i bought 2 as is with few others P6243/P6245). download service manual may give you some light (snapshot from page 6 attached)https://download.tek.com/manual/071105600.pdf
Looking for a source for these banana spring loaded test plugs - Page 1
Forum section: electronics / testgear

author: Voxman
author_rank: Contributor
timestamp: October 25, 2020, 05:46:11 pm
content: Hello Everyone,I’m getting back into electronics repair and setting up my test bench. I used to have a half dozen of these very useful test banana spring loaded plugs but can’t locate them....so I’m scouring the web for a source but so far have come up empty handed. I’m not even sure what to call them so could be part of the problem. In case it needs explaining, the black tips push in and open the slot below on main body which allows one to quick connect a wire or lead.I’ve included a photo of some I managed to find but it led me to another dead end.If anybody knows what these are actually called or knows a source for them, or can suggest an alternative type banana plug, I’d be very much appreciative.Thanks for tour help!Gary

author: tooki
author_rank: Super Contributor
timestamp: October 26, 2020, 12:14:10 am
content: Stäubli KLS4Stäubli SKLS4WAGO 215Schützinger SDK 502 and SDK 799Pomona 73090Pomona 73091Pomona (and others) also makes some screw-type binding post adapters:Pomona 2894Pomona 1286I also usePomona 1825banana plugs, whose screw is so accessible that I use them for temporary connections, and they costfarless than the spring loaded kind.
Tacklife or 'Where Eagles Dare' - Page 1
Forum section: electronics / testgear

author: MiroS
author_rank: Regular Contributor
timestamp: October 22, 2020, 07:40:23 am
content: Have a fun , just look at this picture

author: masterx81
author_rank: Frequent Contributor
timestamp: October 22, 2020, 08:59:08 am
content: At least the positive isn't connected to the 10a socket