hybridfree/eevblog-posts huggingface dataset:
FLIR / Brymen Test Leads - Page 1
Forum section: electronics / testgear

author: EEVblog
author_rank: Unknown
timestamp: May 29, 2020, 06:49:09 am
content: FLIR test leads look like they are the Brymen ones:https://rapid-tech.com.au/flir-ta80-premium-cat-iv-silicone-test-leads/I thought FLIR rebadged another brand meter?, certainly not Brymen. Interesting that they would use the Brymen leads in that case.

author: umbro
author_rank: Contributor
timestamp: May 29, 2020, 07:41:39 am
content: Yes, looks like same. I like Brymen leads

author: EEVblog
author_rank: Unknown
timestamp: May 29, 2020, 08:04:24 am
content: Quote from: umbro on May 29, 2020, 07:41:39 amThey had a few QC issues in the last year or two, but seems solved now.

author: Monkeh
author_rank: Super Contributor
timestamp: May 29, 2020, 12:15:17 pm
content: Quote from: EEVblog on May 29, 2020, 06:49:09 amPop open any recent BM235 of yours - board will have DM64/66 and DM67 options on the silk.https://www.flir.co.uk/products/dm66/You can see it right here, actually:https://youtu.be/9u8TEJdAVdQ?t=301

author: EEVblog
author_rank: Unknown
timestamp: May 29, 2020, 01:34:43 pm
content: Quote from: Monkeh on May 29, 2020, 12:15:17 pmSo there is. Forgot about that.Significantly different case to the BM235, and slightly different LCD too.
HP 208A Test Oscillator - Page 1
Forum section: electronics / testgear

author: Cubdriver
author_rank: Unknown
timestamp: May 22, 2020, 07:52:13 am
content: Recently started digging into this cute little bugger. It's something of a mechanical nightmare (not HP's finest design as far as serviceability goes), but I still like it.It does a lot of nothing at the moment. First order of business will be to come up with a replacement for the NiCds, which are a bit past their prime and seem to be a necessary part of the power supply.They are 5/B225Ts and some web research led me to a 1976 Eveready Battery Engineering Databookhttp://vtda.org/docs/books/Electronics/EvereadyBatteryEngineeringData_1976.pdf5/B225T - five cell stack of B225T NiCd batteries - 1-1/16" (27mm) dia x 1-51/64"(45.6mm) lg; 225mAh capacity @ 22mA 10 hr discharge rate; charge at 22mA @ 6.75-7.25V for 14 hrs (pp 371/372 Eveready Battery Engineering Data 1976)B225T cell - button cell with tabs, 0.992"(25.2mm) dia x 0.363" (9.22mm) lg. (Eveready book, pg 367)I plan to explore replacements in the next few days, but at the moment need to hit the sack as it is currently quarter to four in the morning in these parts. If anyone has any suggestions as to suitable replacements, I would be happy to hear them. I'd /like/ to put something close to the originals in, but if that proves too troublesome will look at daisy chaining more conventional AA cells or something similar. Oculus is working on one as well; his is missing the batteries entirely and a request from him is what got me moving and looking at mine.A few more photos are at:https://pmanning.smugmug.com/Electronics/HP-208A-Test-Oscillator-Pat
Rhode & Schwartz NGMO2 - firmware - Page 1
Forum section: electronics / testgear

author: JxR
author_rank: Unknown
timestamp: May 23, 2020, 02:01:55 am
content: I'm trying to locate the latest firmware for a discontinued power supply: R&S NGMO2. I have version 1.13, and I know it goes at least to version 1.16. I have sent R&S an email, but still waiting to hear back from them. I figure it's a long shot anyone has a copy of it here, but you never know until you ask. Can anyone help me out?
TENMA 72-10495 (KORAD ka3005D) - Constant 0.03V output even in OFF mode - Page 1
Forum section: electronics / testgear

author: SpannersToSparks
author_rank: Regular Contributor
timestamp: April 21, 2017, 01:57:00 am
content: HelloI recently bought the TENMA 72-10495 from amazon uk. It seems a nice unit, however I notice that the second of the two supplies (its a dual unit) always registers +0.03V even when the channel dedicated ON selector is OFF. The left hand unit does not have this.Is there a way to calibrate it out, or do I have something wrong with it? Ive not had it long so it can easily go back to amazon for exchange if needs be.Cheers

author: JFJ
author_rank: Regular Contributor
timestamp: April 21, 2017, 01:05:54 pm
content: Quote from: SpannersToSparks on April 21, 2017, 01:57:00 amVoltage Zero Calibration is the first procedure in the attached pdf file:

author: SpannersToSparks
author_rank: Regular Contributor
timestamp: April 21, 2017, 02:08:01 pm
content: Much appreciated! My unit did not come with a manal and my first google effort drew a blank. Now searched on the full brand and model name and have the manual from Farnell.Thanks for the help!

author: handyguy
author_rank: Newbie
timestamp: May 21, 2020, 03:39:53 pm
content: I just took delivery of a new KA3005D and tried the calibration procedure.I don't have an electronic load, so I only did the other steps not needing it.However, the CC/CV led's do not light up during the procedure, so it's very hard to know what's going on during the calibration.In the end, there is still at a small voltage coming out when 'off' and the display vs my fluke dmm were also still off a bit.Is there a newer calibration procedure written for the latest version?Thanks all!
Telequipment Type 720 Oscilloscope - Any info? - Page 1
Forum section: electronics / testgear

author: Greg Robinson
author_rank: Regular Contributor
timestamp: May 22, 2020, 07:28:36 am
content: Hi everyone,A friend of mine scored a vintage (late 50's era?) Telequipment Type 720 oscilloscope out of a scrap heap for me, I'd like to restore it, vintage test equipment does have a certain nostalgia.I've not been able to find any documentation or information about this model, is anyone familiar with it or know if was sold under another label?It is in rough shape, the power cord was cut and the primary was open circuit, turned out to be the power switch and not the power transformer fortunately. Foolish me forgot to take any photos of it assembled before pulling it apart to access the switch hidden in its bowels, so sorry for the poor photo absent the CRT and knobs.I get a beam on the CRT (handwritten note on the chassis says 4EP1 replaced April '62), but it has all original electrolytics, a handful of paper in wax caps, and most of the wiring has perished and will need replacing.Curiously, it's had some work done I'd guess in the 90's or 00's, a few resistors replaced, but mostly coupling caps. There are still a few coupling caps that appear to be original, and they're mostly film type, and test good for value and leakage. Makes me wonder if the replacements were justified.Final question. I'm not especially familiar with CRT circuits (though am very familiar with required safety, I mostly work on vacuum tube equipment). I've noted this odd, unconnected feature in this scope. Above the rear of the CRT, mounted on the top chassis plate, four floating 2.2Meg resistors with a pin terminal on one side, a flying lead on the other, with those leads socketed to the pins, shorting out the resistors. Obviously they are doing nothing at present, are these meant to go in series with the deflection plates? That's the only purpose I can think of. They share the same pin-sockets as the deflection plate leads.Thanks for any pointers! Hope everyone is staying safe.

author: Greg Robinson
author_rank: Regular Contributor
timestamp: May 22, 2020, 11:53:32 am
content: So, having pored over a few schematics of similar vintage o'scopes, I'm thinking that the mystery 2.2Meg resistors might have been intended for a direct horizontal/vertical input, but the necessary coupling caps (~1-2.2nF, 400V+?) and switches were not fitted.Does that seem likely?
hantek dso5102p Firmware - Page 1
Forum section: electronics / testgear

author: jon.briggs@grassvalley.co
author_rank: Newbie
timestamp: May 19, 2020, 10:55:21 am
content: Hi folksDoes anyone have the latest verified firmware they could share with me please, as the Hantek link from the page below seems to be broken?http://www.hantek.com/en/productdetail_3_26.htmlThanks in advanceJonps. I have already searched in the forum for answers! :-)

author: tv84
author_rank: Super Contributor
timestamp: May 21, 2020, 02:50:51 pm
content: The 5072p and 5202p are the same FW packages. I don't see any reason why 5102p is not the same.Enjoy!
Ted Yapo - Towards an Open-Source Multi-GHz Sampling Oscilloscope - Page 1
Forum section: electronics / testgear

author: snoopy
author_rank: Frequent Contributor
timestamp: November 18, 2019, 04:54:28 am
content: Looks interesting

author: marcopolo
author_rank: Regular Contributor
timestamp: May 21, 2020, 12:21:20 pm
content: Yes very interesting.Any news about this project?
Korad KA3005D manual - Page 1
Forum section: electronics / testgear

author: handyguy
author_rank: Newbie
timestamp: May 21, 2020, 04:44:27 am
content: Hi,Wondering if anyone has (re)written an English language manual for the Korad? The supplied manual is somewhat incomplete and confusing.Thanks!

author: enut11
author_rank: Super Contributor
timestamp: May 21, 2020, 05:12:37 am
content: This manual may help even though it is for the dual version.BTW, do you know the secret to get into M5? Just select M4 then rotate the ADJUST control. Weird but it works!enut11
HP4145B service manual - Page 1
Forum section: electronics / testgear

author: graybeard
author_rank: Frequent Contributor
timestamp: May 20, 2020, 08:25:02 pm
content: I am looking for a copy of the HP4145B service manual that includes assembly and schematic diagrams. I have found a copy that dos not have the schematics. I found a copy of the vector monitor service manual. I have also found a copy of the HP4145A service manual that includes schematics. Although the A & B versions are similar similar, there are most likely differences beside the floppy drive.Thank You,Chris Grossman

author: 0culus
author_rank: Super Contributor
timestamp: May 20, 2020, 08:38:34 pm
content: http://artekmanuals.com/manuals/hp-manuals/Search and ye shall find. Artek is 100% worth paying for because their scans are of the best quality.  ok, ok, that sounds like astroturfing. I am not affiliated with them in any way, just a satisfied customer.

author: tautech
author_rank: Super Contributor
timestamp: May 21, 2020, 12:42:39 am
content: Did you find this one:https://www.atecorp.com/ATECorp/media/pdfs/data-sheets/Agilent-4156A_Manual.pdfRefer to P12 for the list of other manuals.

author: graybeard
author_rank: Frequent Contributor
timestamp: May 21, 2020, 05:52:52 am
content: Quote from: tautech on May 21, 2020, 12:42:39 amYes I had found that one too and I printed out the 4145 HPIB command section.
Best Price for Siglent 1104X-E - Page 1
Forum section: electronics / testgear

author: Tech77997
author_rank: Contributor
timestamp: May 20, 2020, 04:08:52 pm
content: Thank you all for your input. I have decided to go ahead and purchase the Siglent 1104X-E. I see the price is $456 on Amazon; is this the best price I can get it for? Are there are any student discounts available anywhere, or EEVBLog discounts available? Thank you.

author: stafil
author_rank: Regular Contributor
timestamp: May 20, 2020, 05:44:23 pm
content: Quote from: Tech77997 on May 20, 2020, 04:08:52 pmThere is a discount for saelig.com, but even with the discount it is still more expensive, than the $456 of Amazon.

author: Elasia
author_rank: Frequent Contributor
timestamp: May 20, 2020, 07:08:21 pm
content: I replaced mine with a SDS2100X just a few weeks ago, i still got the original box and everything for my prior 1104X-E.. if interested send me a pm with an offer if you dont mind used like new. Bought it from saelig about 2 years ago now

author: MarkF
author_rank: Super Contributor
timestamp: May 20, 2020, 08:20:37 pm
content: Again???Not a good idea.Shall we ask a four time?Answer here!https://www.eevblog.com/forum/beginners/best-price-for-siglent-1104x-e/msg3076649/#msg3076649And here!!https://www.eevblog.com/forum/beginners/which-of-these-rigol-oscilloscopes-or-pay-more-for-sigilent-1104x-e/msg3076648/#msg3076648

author: tautech
author_rank: Super Contributor
timestamp: May 20, 2020, 09:09:08 pm
content: Quote from: Tech77997 on May 20, 2020, 04:08:52 pmGood luck with one at that price as it's below RRP and in a minute for two I couldn't find it on Amazon US.
HP 83712A 20 GHz Sig Gen Upgrade Help - Page 1
Forum section: electronics / testgear

author: w6te
author_rank: Newbie
timestamp: May 19, 2020, 09:37:11 pm
content: Greetings,I have an 83712A 20 GHz Sig Gen that is lacking an internal step attenuator which was optional (1E1). I would like to install this option. The parts list calls for p/n 33322-60012 (0-110 dB step attenuator). My question is, does the installed F/W need to be updated to support this upgrade or will the attenuator be automatically detected?I would be grateful for any information or insight.

author: TheSteve
author_rank: Unknown
timestamp: May 20, 2020, 12:35:07 am
content: I don't think any option will be auto detected. You will need to go into an advanced menu and enable it. The details are covered in the one of the manuals.

author: w6te
author_rank: Newbie
timestamp: May 20, 2020, 02:48:56 pm
content: Thanks for the input. I'll recheck the manuals. That sounds promising. I was hoping there wasn't a F/W upgrade needed.
Yihua 305D IV horrible offset in current -help to calibrate or junk - Page 1
Forum section: electronics / testgear

author: marce002
author_rank: Regular Contributor
timestamp: May 07, 2020, 08:35:22 pm
content: HiI was wrong buying this bench YIHUA 305D IV!!! is was a real mistake since amps readings are terrrible off... Can anyone know how can I calibrate with the 4 internal blue pots in order to have real amps reading and not offset in low currents (like 100mah error!!...)I have managed to get volts almost acceptable *compared with my reliable unit multimeter 980d+, but current think has 3 pots to work with.... i know maybe they are for:1- mA range gain.2- A range gain.3- mA and A offset.4- V gain. says VR in the board attached picbut dont know which one controls what, in the IV version... see circuit attchedalso the procedure to calibrate or adjust..... low current measure half of the real current eg says 50mah and should be 110mah in 4000mah says 310mah and socrap

author: coromonadalix
author_rank: Super Contributor
timestamp: May 08, 2020, 01:44:53 am
content: the safest way would be to measure them before playing with them, remove the pcb and probe each side of the center trimpot pin, write them on a sheetre assemble the pcb, and try to fiddle with one of them say voltage to minimum, voltage to maximum same for current with a small known load and known drawn current ex:12volts in a 12 ohms load would give 1 amp but the resistor will heat a lot 12wattsthat way you may find if they are adjustments for the displays and or the power supply max current and voltages values ?

author: marce002
author_rank: Regular Contributor
timestamp: May 19, 2020, 05:21:45 pm
content: returned to seller, and went to an UNNIT 5a 30v 4 digit
DSO5102P Firmware update - Page 1
Forum section: electronics / testgear

author: edmundopt
author_rank: Regular Contributor
timestamp: April 14, 2014, 05:32:18 am
content: Hello, this update is available for download, but I have nothing wrong with my oscilloscope and I can not find the changelog, can anyone provide it ?Has anyone upgraded to this new DSO5102P firmware, anything wrong with it ?link to the new firmwarehttp://www.hantek.com.cn/down.aspx?url=http%3a%2f%2fwww.hantek.com%2fProduct%2f5000P%2fDSO5102P_Firmware.zip

author: edmundopt
author_rank: Regular Contributor
timestamp: April 17, 2014, 08:55:17 pm
content: Am I the only person in the forum to have this oscilloscope ?

author: jon.briggs@grassvalley.co
author_rank: Newbie
timestamp: May 19, 2020, 04:27:47 pm
content: Hi EdmundDo you still have this firmware and could you share it? The Hantek site seems to be broken.ThanksJon
Agilent 7000B series scope with "as" (atto seconds) resolution? - Page 1
Forum section: electronics / testgear

author: HighVoltage
author_rank: Super Contributor
timestamp: May 19, 2020, 08:19:08 pm
content: Have you ever seen a signal on a scope measured in atto seconds?Well, here it is... on an Agilent MSO7054B ...This attached signal is basically a precise automotive sensor signal, voltage in mV, and a pulse of 1.5900 ms long.The standard deviation of the pulse width is shown and is 152.17 as (Atto Seconds)I thought this must be a firmware mistake and if keep it running and the Std.Dev. starts rising, it will switch to us (Micro Seconds). But instead, it switched to 3.0734 fs (Femto Seconds), so the atto seconds must have been correct.I just find it hilarious to see atto and femto seconds resolution on a scope, even if it is a calculated Std.Dev.So, is this a firmware mistake or on purpose?Or did I miss something?

author: Venturi962
author_rank: Regular Contributor
timestamp: May 19, 2020, 09:26:15 pm
content: I've got a DSO6034A and do recall seeing femtoseconds on a period measurement in the past.One further note you might want to look into is to whether or not your scope has 'Precision Measurements' enabled or not. This gives better measurements at the expense of waveform update rate. From the manual:

author: KE5FX
author_rank: Super Contributor
timestamp: May 19, 2020, 10:30:02 pm
content: Definitely. The precision option really helps with these scopes' already-excellent FFT implementations. It wasn't originally supported, but was added for free in a firmware update a few years back. Major props to the HPAK scope folks for the upgrade.

author: Someone
author_rank: Super Contributor
timestamp: May 19, 2020, 10:55:39 pm
content: Quote from: Venturi962 on May 19, 2020, 09:26:15 pmEven with the 128k (or 64K) points in the measurement traces, its still quite limited in resolution. These example infeasibly small values are so far below the measurement precision (even after considering interpolation of the crossings) that they're almost certainly numerical errors from the statistics calculation.

author: HighVoltage
author_rank: Super Contributor
timestamp: May 20, 2020, 09:07:24 am
content: Quote from: Venturi962 on May 19, 2020, 09:26:15 pmHello Venturi962Do you really see this "precision" option on your DSO6034A?I think the 6000 Series and 7000 Series are kind of the same and even share the firmwareBut I do not have that "precision" option on my 7000B series scopes
Leader LT1610A Programmable Video Generator Software - Page 1
Forum section: electronics / testgear

author: interactii
author_rank: Newbie
timestamp: May 18, 2020, 12:38:01 pm
content: It's a bit of a long shot but anyone happen to have the software for the Leader LT 1610A Video Generator? There were 7 disks for Windows 3.1/95 - 4 control disks and data disk and 2 database engine disks. I picked one up on the cheap and I'd love to have a play with its ability to generate custom signaling.Thanks!
Sourcing the Horizontal Cam Switch for Tek 434 - Page 1
Forum section: electronics / testgear

author: Cigarsnob
author_rank: Regular Contributor
timestamp: May 18, 2020, 02:30:55 am
content: Looking for advise regarding a design job and sourcing vintage parts. I'm expecting "Don't do it and not possible" from you guys, but figured I'd ask anywaysI have a customer that wants to reverse engineer the horizontal board of a Tek 434 scope, board A8 and get several of them made. No clue why and I am going to inform them that this will very unlikely be possible due to sourcing the cam switch and the amount of hours to comb over the schematic, bom, sourcing alternative parts for those obsolete parts, redraw the schematic, perform the layout, and test the boards.1) Anyone have experience reverse engineering a vintage scope and produce some modern PCBs that worked?2) Cam switch seems to be a go/no-go with regards to the ability to do the job. Is it possible to source this part these days? An alternative method to achieve the same thing?I have already recommended that they just go on ebay and buy up every Tek 434 and test the A8 board and just use those. But they claim they need more than what's on ebay. Haven't asked why. Why so many for a scope this old.I'm a fan of vintage test equipment as much as the next one, but yeah....
Knick Berlin S11 precision voltage source teardown and repair attempt - Page 1
Forum section: electronics / testgear

author: justanothername
author_rank: Regular Contributor
timestamp: May 17, 2020, 11:22:47 am
content: Hi.I recently saved a knick S11 precision voltage source from trash. Here are some pictures of the inside. Very nice old precision resistors.The fault was a broken connection in the output voltage divider. After soldering, it works, but it is off quite a lot. Example: 4.77V instead of 5V.The voltage divider is ok, all combinations produce the same errornous voltages. I had to open the styrofoam roll to see whats inside.Turns out it is a electrochemical voltage standard and a thermistor. I guess I have to replace the styrofoam later now that i ruined it. It was glued together, in my defence...The weston(?) cell still measures 1.01794V, measured with my 34401A in 10GOhm mode. If it is a weston cell, it should have 1.01865V and may be off a little but not that serious as the complete unit is.At this point I don't know what to do. Does anyone here has schematics for this?

author: justanothername
author_rank: Regular Contributor
timestamp: May 17, 2020, 11:28:12 am
content: here are some more pictures.
temperature - Page 1
Forum section: electronics / testgear

author: Ben sage
author_rank: Contributor
timestamp: May 19, 2020, 01:44:57 am
content: Hi guysI have a workshop that gets around 50°F and I’m wondering if it can be damagingfor my equipment because I have a oscilloscope and some multimeters so I was wondering what is the lowest temperature that would be OK for themThink you!!

author: CalMachine
author_rank: Frequent Contributor
timestamp: May 19, 2020, 02:53:24 am
content: Quote from: Ben sage on May 19, 2020, 01:44:57 amYou can look up the specifications for the equipment you're worried about. An operating and storage temperate range is almost always included. I think you'd be safe for operating down to 32F (0C) with most equipment

author: helius
author_rank: Super Contributor
timestamp: May 19, 2020, 03:30:45 am
content: The relevant parameter is generally the dew point (the temperature of a surface that will condense water in an atmosphere of a given temperature and relative humidity). If your equipment is below the dew point of the room, it will become wet with dew and start to corrode. Sometimes the solution is simply to keep things powered on, as the heat they generate will keep them above the dew point.

author: cdev
author_rank: Super Contributor
timestamp: May 20, 2020, 07:18:57 pm
content: I have had homemade PCBs corrode a bit in my basement because they were not coated with conformal coating. Luckily nothing has been lost yet but it is definitely an issue of major concern for me.
Calibration procedure for BK 5491A - Page 1
Forum section: electronics / testgear

author: rkeller
author_rank: Contributor
timestamp: February 21, 2020, 11:40:38 pm
content: Does anyone have the front panel calibration procedure for the BK 5491A model.I have the manual that claims it can be calibrated via the front panel or the back USB but fails to give any specifics...Thank you all in advance.

author: Ordinaryman1971
author_rank: Frequent Contributor
timestamp: May 17, 2020, 03:50:25 am
content: I believe you can request the software from BK precision, you still need a TTL adapter to do the calibration over the RS232.
Datron 1062 EPROM info needed - Page 1
Forum section: electronics / testgear

author: TheDefpom
author_rank: Frequent Contributor
timestamp: May 15, 2020, 06:29:56 am
content: Hi All,I am currently working on a couple of these Datron 1062 multimeters, one of them is the LS101 version.I intended to grab all the EPROM data from both units to back them up but found that the EPROM from the IEEE of the LS101 is reading as completely empty, FF all the way through, it seems that one is dead.I already grabbed the firmware from the other datron 1061 thread, but as the IEEE and Digital is from a different year (and model) I am not sure if I can rely on it.My IEEE EPROM is part number: 290133A-19B (dated 5-8-85), I am hoping to get the EPROM bin file from someone with the same part number.Both of the units I picked up look to have been messed with and used as parts swap units from what I can tell, I am not sure if the IEEE EPROM's are even the correct ones to match the Digital Board.My 1062 (non LS) has these EPROMs: Digital PCB M35: 290129A-19B, M30:290128A-19B, M18:290127A-19B (all dated 8-14-85) and the IEEE PCB M3:290070A-S131 (I think, its hard to read) (dated 4-22-86), perhaps someone can tell me if the IEEE is OK with the digital ones (I know that they have to be a matching set).My LS101 has these EPROMs: Digital PCB M35: 290129A-19B, M30:290128A-19B, M18:290127A-19B (all dated 8-15-85, just 1 day different to my other unit!) and the IEEE PCB M3:290133A-19B (dated 5-8-85) , perhaps someone can tell me if the IEEE is OK with the digital ones (I know that they have to be a matching set).I am doing videos on the repair of both of these units, I have already fixed a few problems on them both, but neither are working yet.I will be happy to share these EPROM files once I am sure that they are OK, at this stage I actually don't even know if they are corrupted.

author: picburner
author_rank: Frequent Contributor
timestamp: May 15, 2020, 07:41:07 am
content: I found this but the firmware is more recent than yours.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: May 15, 2020, 07:45:06 am
content: That is the same EPROM data I found too.Even if someone can confirm that one of those sets will work ok in either/both of my units that would be useful.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: May 15, 2020, 07:49:41 am
content: MODERATORSI think I put this in the wrong section, can you please move it to the repair section.

author: maginnovision
author_rank: Super Contributor
timestamp: May 15, 2020, 10:43:11 pm
content: It doesn't matter which ROMs you use. Use 1072 ROMs if you'd like.
Rigol UltraScope Versions - Page 1
Forum section: electronics / testgear

author: kelemvor
author_rank: Regular Contributor
timestamp: May 15, 2020, 08:18:27 pm
content: Does anyone know where to find "the latest" version of UltraScope?I recently blew a hard drive and had to reinstall windows. The version of UltraScope I found on the rigol site (1.02.12) seems to be missing some features that I previously had. Also some bugs I'm not used to such as can't resize window. I poked around a bit on the Rigol site and found several versions attached to various scopes. Does anyone know what the newest one is and have a link? I'm pretty sure it's not 1.02.12.Sure wish I had made a copy of the installer I used before the drive crash...On the upside, if there is one: Now I understand why people complain about ultrascope. The version I was using before worked great. This version - not so much.

author: kelemvor
author_rank: Regular Contributor
timestamp: May 15, 2020, 08:35:51 pm
content: Disregard this, I found the other version in a backup.Oddly, it's older: 1.02.09. However, it is superior to 1.02.12. I'm not sure what happened but the .12 version is missing features and has additional bugs. I wish rigol issued release notes with UltraScope. It's got so much potential, yet needs some work.
Keysight scopes - transferring licences? - Page 1
Forum section: electronics / testgear

author: alanambrose
author_rank: Frequent Contributor
timestamp: May 14, 2020, 01:44:10 pm
content: Hi,I have a MSOX3024A with a properly-kosher fully-paid-for with-a-certificate APPBNDL (in case you wondered). I'm thinking of buying a MSOX3104T. Do you think I can 'un-licence' the APPBNDL from the scope I have and apply the bundle to the new scope. That would make quite a difference to my buying decision...Alan

author: Elasia
author_rank: Frequent Contributor
timestamp: May 14, 2020, 02:34:17 pm
content: You can ask your vendor but usually those codes/files are locked to a specific serial number and depending on the model not reversible by normal meansYou might be better off asking for a trade up deal

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: May 14, 2020, 05:27:18 pm
content: Elasia is correct on the licensing, we call them "node locked" licenses. I have good news for you, though. You can actually just upgrade your bandwidth and the cost is the difference between the 1 GHz version and the 200 MHz version. So, it's essentially as if you purchased the 1 GHz version from day 1 (no upcharge). And, you'll get a fresh acquisition board out of it - it's a pretty great deal.From page 39 of the datasheet, it looks like you'll need the DSOXT3B2T104U option.https://www.keysight.com/us/en/assets/7018-04570/data-sheets/5992-0140.pdfYou should be able to put in the order through your preferred distributor, or possibly directly through us athttps://www.keysight.com/find/contactus.
UT139C Resistance Issue - Page 1
Forum section: electronics / testgear

author: Tomsik
author_rank: Contributor
timestamp: May 13, 2020, 05:31:36 pm
content: Hi, my UNI-T UT139C DMM not working if it is set to resistance measuring.It looks like that it constantly reset. I've examined the connection of the main wheel and LCD and I cleaned it by alcohol. Batteries are OK.Does anyone any idea, what is it cause?See my video below

author: retiredcaps
author_rank: Super Contributor
timestamp: May 13, 2020, 10:55:22 pm
content: Did you have an "oops" moment when using the meter in resistance mode? For example, did you accidentally try to measure something high energy when the meter was set to resistance mode?

author: Tomsik
author_rank: Contributor
timestamp: May 14, 2020, 04:35:11 pm
content: Quote from: retiredcaps on May 13, 2020, 10:55:22 pmI don't remember... It happened spontaneously

author: AVGresponding
author_rank: Super Contributor
timestamp: May 14, 2020, 05:26:05 pm
content: Well, I have a functioning 139C so if you need to compare readings from components inside, let me know.
Powertron 5900 - Page 1
Forum section: electronics / testgear

author: Leuams
author_rank: Contributor
timestamp: May 13, 2020, 11:10:04 pm
content: I'm looking for more information on the Powertron 5900 high power general purpose audio generator:http://industrialtest.com/dedicated%20ac%20power%20sources.htmI contacted the manufacture and was able to get a service manual but it was lacking a full schematic that would be helpful for me. We use one of these units at work and I am looking to not only repair the one we have but hopefully make a better one that doesn't drift as much as the current one and has better controls. I see it is essentially a class AB amplifier and a transformer but not having much experience with amplifier design I was hoping to have something to use as a starting point.Also maybe someone has a suggestion for a newer piece of equipment then this but I didn't have much luck with my search. I don't think I can go into much detail about what product we test using this equipment but it has to have similar power capabilities as the Powertron 5900.Thanks,

author: coromonadalix
author_rank: Super Contributor
timestamp: May 14, 2020, 02:24:34 pm
content: I would re ask the manufacturer for a service manual under an non disclosure agreement, maybe they would sent you an complete SM ?
Rigol DS1054+option bundle, BW still hackable? - Page 1
Forum section: electronics / testgear

author: ChenBH
author_rank: Newbie
timestamp: May 11, 2020, 12:43:17 pm
content: Hello,once a year I see a post popping called: "Is the DS1054 still hackable?"I couldn't find the 2020 edition and I'm about to make a purchase of a Rigol DS1054+option bundle from a local vendor (Israel).He sent me this picture and stated that if I want the 100MHz version I'll need to buy the '1104 model.Something has changed? New firmware? Can I still hack the 1054's bandwidth in this day and age?Attached a screenshot of the stated included options.Thanks,

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: May 11, 2020, 12:49:05 pm
content: Simple answer is yes, you can still hack bandwidth.Google "Riglol" (not a typo).Many recommend using DSER (not listed in the Riglol page) as the preferred option which will give all features except the 500uV Vertical resolution, that is because the scope isn't physically capable of that resolution and some have complained that the display is pixelated/wrong.Oh and several people have tested bandwidth at around 133 MHz.

author: ChenBH
author_rank: Newbie
timestamp: May 11, 2020, 01:03:13 pm
content: Quote from: Gandalf_Sr on May 11, 2020, 12:49:05 pmThnks for the quick replyYeah, I know about Riglol but I doubted its power because of the vendor's statements.So you say there is no known firmware upgrade that makes the scope unhackable?Is there an option to downgrade the firmware? Any remarks about known good past firmwares if downgrading is possible?

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: May 11, 2020, 01:10:08 pm
content: What Riglol does is generate the same codes you would get if you paid to buy the upgrades so there is no actual 'hack' taking place on the scope itself, all you're doing is entering code(s) that are correct for your scope.If Rigol issues new firmware, the scope will work as before; if it didn't, Rigol would be hobbling all the buyers who paid for upgrades.FYI, after the bandwidth 'upgrade', the DS1054Z will report itself as a DS1104Z under system info.

author: Fungus
author_rank: Super Contributor
timestamp: May 11, 2020, 01:50:19 pm
content: Quote from: ChenBH on May 11, 2020, 01:03:13 pmNope.Simple reason: There's no ongoing "war" between Rigol+Hackers. Hacking is Rigol's way of getting hobbyists to buy their 'scopes.

author: ChenBH
author_rank: Newbie
timestamp: May 14, 2020, 11:43:05 am
content: Got it, thank you for the replies
RD6006/S06A power supply assembly - Page 1
Forum section: electronics / testgear

author: hpmaxim
author_rank: Regular Contributor
timestamp: May 13, 2020, 06:47:00 pm
content: I have two questions:1) Where/How do I mount the temperature sensors? The one on the fan controller looks like it goes up against the main power supply, but there is no clear thermal connection. The other one is long enough to reach everywhere in the case.2) Does anyone have a grounding strategy for the case? The case of the 60V supply is grounded, so if i sanded the bottom of the case under the mounting screws this probably would ground the case (the screws themselves are grounded). More sanding for the upper portion of the case too?
ADF4351 SweepGenerator - Page 1
Forum section: electronics / testgear

author: spongella
author_rank: Contributor
timestamp: May 13, 2020, 10:21:46 am
content: Just got one of these for doing sweeps, was wondering if anyone knows what "RF_Fre 1" and "RF_Fre 2" are for? I am trying to contact the manufacturer in the interim. Also, it appears this is an FM signal generator as per the appearance of the signal on my o'scope. I plan to use this for checking an IF filter in an Icom 25A. Thanks very much.
RTM3004 arrived with a dent on its shell - Page 1
Forum section: electronics / testgear

author: stafil
author_rank: Regular Contributor
timestamp: May 12, 2020, 01:15:11 am
content: Newark has this really good offer on RTM3004 at the moment ($3,200 for the base model) and since it was one of the couple of brands that I don't have anything from, I thought I order one to take advantage of it.However as soon as I removed it from it's box I noticed a dent on its shell (bottom right corner). The box doesn't seem damaged so this is either a return that Neward resold as new, or it was damaged at the factory before getting packed.I went ahead and sent an email to both Newark and Rohde & Scharz, but I am afraid they will try to shift the blame on me. Did anyone ever had a similar experience before? Any idea on how to proceed if I get a reply pushing back?

author: maginnovision
author_rank: Super Contributor
timestamp: May 12, 2020, 01:44:41 am
content: I wouldn't expect push back. That looks like a really bad hit though. Was it a demo unit or something?

author: stafil
author_rank: Regular Contributor
timestamp: May 12, 2020, 02:11:06 am
content: Quote from: maginnovision on May 12, 2020, 01:44:41 amNo, I don't think it was a demo unit, it didn't mention anything.Thanks for the encouragement, I hope they there isn't a push-back.

author: nctnico
author_rank: Super Contributor
timestamp: May 12, 2020, 06:07:54 am
content: It would be very poor customer service if they don't take it back and exchange for new. I'd concentrate on dealing with Newark though because that is where you bought the unit from. Just don't give them any reason to doubt so be short and tell them you are going to send it back and expect it to be replaced. One sentence is enough; writing longwinded stories as some people tend to do is not good. Long stories just confuse the reader.

author: stafil
author_rank: Regular Contributor
timestamp: May 12, 2020, 07:38:19 pm
content: Just an update that the Newark folks were very helpful and a new one is already on its way.to them

author: NoisyBoy
author_rank: Frequent Contributor
timestamp: May 12, 2020, 08:17:47 pm
content: Good to hear, they have always treated me well. Enjoy your new scope!

author: Rich@RohdeScopesUSA
author_rank: Frequent Contributor
timestamp: May 13, 2020, 04:23:38 am
content: Glad Newark took care of you. Don’t hesitate to PM me if you have other issues.-Rich

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: May 13, 2020, 09:04:49 am
content: Well it looks like Newark did the right thing. In these circumstances, I have used the credit card company to help me. If the vendor messes me around, I tell them I'm going to call the CC company which often makes them fix the problem. If they don't, I call the CC company and file a complaint over the transaction. By using a CC to pay for 100% of the purchase price, you have insurance for 90 days or so, even if you took it out of the box and dropped it. They also typically double the manufacturers warranty period so, if it were to break after a 1 year warranty has expired, the CC company will pay for repairs.
Tektronix TSG4106A Overview and Teardown - Page 1
Forum section: electronics / testgear

author: lukier
author_rank: Unknown
timestamp: November 20, 2015, 09:02:58 pm
content: Thanks for the teardown. Really nice design.One thing is strange. Main PCB has SRS written on it. Jumper board has SRS SG385. OCXO is from SRS.Is this a rebadged SG380/SG390 from SRS with different front panel? Rear of the instrument looks identical too.BTW There might be an MCU on the main PCB, on the back, above the NI GPIB chip, big QFP with a sticker (FW rev?), probably dealing with Ethernet & other stuff.

author: elor
author_rank: Contributor
timestamp: May 13, 2020, 06:51:27 am
content: looks like a re brand which isnt bad for tek as Stanford Research Systems (SRS) is kind of a standardattached a photo of the SG382 main board
Problem with assembled uCurrent GOLD - Page 1
Forum section: electronics / testgear

author: vijayenthiran
author_rank: Newbie
timestamp: October 25, 2017, 01:19:29 pm
content: I have assembled uCurrent GOLD on my own since it was out of stock in EEVBlog store a few weeks back.I am testing it with 316K? 1% resistor with 3.3V supply expecting 10.44mV reading across the uCurrent. But I am getting 7.9mV (with a little bit of fluctuation). DMM is showing 10.4uA when measured.Measurement with uCurrent GOLD:Measurement with DMM:Here's the picture of my assembled uCurrent GOLD.I checked for shorts. I did a visual comparison with other  uCurrent GOLD. The only difference I could find is that R6 and R7 resistor code are shown as 010 (1?) on those pictures whereas it is 104 (100K?) in mine (which is correct as per original BOM).Please suggest some troubleshooting method.Here's myBOMand I have used few equivalent parts instead of the one mentioned in theoriginal BOM.

author: vijayenthiran
author_rank: Newbie
timestamp: October 26, 2017, 06:49:46 am
content: Today I was debugging again. When I measure the resistors R6 and R7 on the uCurrent board, it is showing 88.8K for both the resistors. When I measured that resistor externally, I get 100K. Any idea why this is happening?I am usingthis resistor(ERA3AEB104V)

author: vijayenthiran
author_rank: Newbie
timestamp: October 26, 2017, 08:07:15 am
content: Found the issue. I was using cheap 50cm Crocodile Clips Cable which had a resistance of 1.2 Ohm. My bad. When I connected wires and multimeter probe directly to the uCurrent binding post, it worked like charm.Culprits:The Cable which I was using measured 1.2Ohm. I was using 4 of themThis worked.

author: claytonedgeuk
author_rank: Contributor
timestamp: October 27, 2017, 05:32:34 am
content: Thanks for posting that! Something to be more mindful of when you're working with low currents!

author: spacejunkie
author_rank: Newbie
timestamp: July 25, 2018, 10:31:30 pm
content: I wonder why a resistance of 1.2 ohm was a problem while measuring voltage. Voltmeter is a high impedance device and the uCurrent output is driven by an opamp so eve 120 ohm resistance should not cause that much error.

author: Tomsik
author_rank: Contributor
timestamp: May 11, 2020, 07:19:24 pm
content: I've noticed thin wire between -IN terminal and sensing resistor...Does somebody know what is the reason? Or is it issue?

author: SilverSolder
author_rank: Super Contributor
timestamp: May 12, 2020, 02:26:19 pm
content: Maybe the thin link acts as a crude fuse, in case of gross overload?

author: SilverSolder
author_rank: Super Contributor
timestamp: May 12, 2020, 02:27:25 pm
content: Quote from: vijayenthiran on October 26, 2017, 08:07:15 amNice work - looks good.
Thsinde Multimeter 18A - Page 1
Forum section: electronics / testgear

author: Ponchojack
author_rank: Newbie
timestamp: May 11, 2020, 04:08:35 pm
content: I search this forum and didn't see any comments on Thsinde multimeters. I've been using this mid-size multimeter for about a month now, and have to admit its a nice little unit. I paid $16 on Amazon Prime and it seems to be worth every penny Here's my take.Pros:Goldielocks size, not to small or big.Nice integrated rubberized case with stand. Seems well made without cracking it open. Nice color too, Teal Green.All the expected features, also includes microamp and NCV.6000 count, seems reasonably accurate for general use.Cons:Although the leads seems quite nice; soft rubber, balance, good construction, the tips were almost none conductive. I rubbed them down with fine bronze wool and that fixed the problem. They almost seems coated with something.No temp.The meter isn't as fast as my Fluke 117 but its ok. and a hell of a lot cheaper. A great second meter and I would certainly recommend it to the hobbyist.Thsinde has released a new meter its seems, the 19B on Amazon for $25. It has temp, but no NCV. Seems this vendor doesn't have a unit with both.Lets see how long this one lasts. I plan to put it on the boat.Poncho

author: Fungus
author_rank: Super Contributor
timestamp: May 11, 2020, 09:09:58 pm
content: Pic? Link? Anything...?

author: Wytnucls
author_rank: Super Contributor
timestamp: May 12, 2020, 09:59:59 am
content: Here is the 18B+:Probably another Mastech offshoot, like HY, Bside, Surpeer and PeakMeter .
Rigol DS1052e probe noise - Page 1
Forum section: electronics / testgear

author: hozone
author_rank: Regular Contributor
timestamp: May 10, 2020, 08:58:13 am
content: Hello,first of all excuse me for the stupid question.I've never needed to go down to 2mV with my oscilloscope.I've a Rigol DS1052E, not modded.Yesterday I've set vertical to 2mV, and I've noticed this behaviour:I've noticed a 20mV noise with a 1K freq when the probe cable laid flat, the noise was lesser when the cable was rolled up.No noise without probes.You can found pictures as reference.I've tried both channels, with original Rigol probe, and 100Mhz probe I have spare. Things are a little better with the spare probe, but not that much.What's wrong with this? Did I miss something?Thank you!

author: Fungus
author_rank: Super Contributor
timestamp: May 10, 2020, 10:02:46 am
content: Quote from: hozone on May 10, 2020, 08:58:13 amThere's the clue^Probes act as radio antennas. Probing things at those levels is an art form.

author: hozone
author_rank: Regular Contributor
timestamp: May 10, 2020, 10:28:36 am
content: Thank you!Meanwhile I've watched a couple of video, think I've to thank also Dave, he gives me some tips I'll try in a few...By the way, I'm going down to 2mV to measure ripple & noise of a dc to dc (XL1509) converter I've designed for a small board.

author: hozone
author_rank: Regular Contributor
timestamp: May 10, 2020, 12:37:23 pm
content: Find the noise generator!It was my PC UPS 3 mt far in the room.If I switch that off, the 1k noise goes away, still I away some little noise, but at least I've learn where it cames from.I will buy two 50ohm feed through terminator to try the differential probe method for ripple & noise measurement.

author: Fungus
author_rank: Super Contributor
timestamp: May 10, 2020, 01:13:15 pm
content: Quote from: hozone on May 10, 2020, 10:28:36 amThat video on measuring ripple has the info you need, i.e. x1 probe, 20MHz filter enabled.

author: klausES
author_rank: Regular Contributor
timestamp: May 11, 2020, 12:05:06 am
content: Yes it can be misterious.There is only one place on my bench where I cannot lay my probes.Now comes the mysterious ... I can hold them anywhere, even close to other devices (and there are many) without interferencebut just at this one point with the malfunctions there is no other device, switching power supply or similar in the vicinity.

author: hozone
author_rank: Regular Contributor
timestamp: May 12, 2020, 07:22:25 am
content: A Kind of Magic
TTi power supply - remote sense plugs - Page 1
Forum section: electronics / testgear

author: mio83
author_rank: Regular Contributor
timestamp: May 12, 2020, 02:30:20 pm
content: Hello,this is totally a noob question, but I couldn't find an answer after googling and youtubing a bit.I've just got (2nd hand) one of these power supplies from TTi.http://resources.aimtti.com/datasheets/AIM-EL-R+EX-R_series_DC_power_supplies_data_sheet-Iss1.pdfMy question:do you know what's the name for the plug used for the remote voltage sense?In the datasheet they just say: "Sprung loaded screw-less terminals."I don't know how I should use them. Do I need to buy an adapter or something?If yes, could you please suggest me the name for what I need to search?If not, are you perhaps aware of a Youtube video where I can see how these plugs are used?thanks!

author: AVGresponding
author_rank: Super Contributor
timestamp: May 12, 2020, 03:07:50 pm
content: They're intended for you to just put bared wire in them.Push and hold to open the jaws, put the wire end in, then release the button, it'll grab the wire.