hybridfree/eevblog-posts huggingface dataset:
Gould OS3000A - strange potting compound in EHT - Page 1
Forum section: electronics / testgear

author: danielweg
author_rank: Newbie
timestamp: March 17, 2021, 09:13:07 am
content: Dear all,I got an old Gould OS3000A analog oscilloscope. It seems to be working (two traces visible). When cleaning the inside I noticed some silicone like material on the outside of the EHT, so I opened it. It seems like someone put in some semi-liquid compound into the trippler section (consistency of soft butter, but greyish). I was wondering if it is okay that the compound has this consistency and what it could be? I am slightly concerned that it is so soft and also about the chemical composition. I think the person who put it in added the silicone on the outside to seal it. Any ideas?Thanks in advance!Daniel
Suggest a portable spectrum analyser for GPS interference finding - Page 1
Forum section: electronics / testgear

author: Rerouter
author_rank: Super Contributor
timestamp: March 14, 2021, 09:12:17 pm
content: Hello, Could anyone suggest a portable spectrum analyser suitable for GPS interference tracing, At the moment I don't believe its a jammer, rather some other nearby device that is spewing some noise on the bands as lock reliably drops out in a 5m radius of a certain type of bus bodyBudget is preferably below $1000, and new would be preferred, at present my thoughts are I need something as sensitive as GPS to work, (-125db) but I suspect I could be incorrect here.

author: hendorog
author_rank: Super Contributor
timestamp: March 14, 2021, 09:14:00 pm
content: Prob best bet in that price range is a Signalhound SA44bhttps://signalhound.com/products/usb-sa44b/
Keithley or Keysight(Agilent) - Page 1
Forum section: electronics / testgear

author: trophosphere
author_rank: Frequent Contributor
timestamp: March 14, 2021, 04:15:59 am
content: So I was doing one of my almost daily scouring of test equipment on Ebay and found a listing with the following picture showing a RF Signal Generator by Keithley but in the screen itself there is the Agilent logo on the top blue bar. I know some test equipment manufacturers just put their own branding on others but did not expect it from a big name like Keithley. Looking at other pictures from other sources show a Keithley logo in place of the Agilent logo so I'm not sure if the listing I found just was an anomaly.

author: syau
author_rank: Frequent Contributor
timestamp: March 14, 2021, 07:14:34 am
content: Quote from: trophosphere on March 14, 2021, 04:15:59 amKeithley sold their RF section to Agilent few years ago.
Datron Wavetek 4920 and 4950 brochures and 4920 design/app note - Page 1
Forum section: electronics / testgear

author: volvo_nut_v70
author_rank: Regular Contributor
timestamp: July 07, 2020, 02:43:57 pm
content: A walk through memory lane...........

author: chinapp
author_rank: Contributor
timestamp: March 13, 2021, 05:11:28 am
content: Datron Wavetek 4920 brochure.pdfthis file maybe broken

author: doktor pyta
author_rank: Frequent Contributor
timestamp: March 13, 2021, 08:12:09 am
content: I think files got swapped.I open brochures about 1271.But still interesting

author: volvo_nut_v70
author_rank: Regular Contributor
timestamp: March 13, 2021, 05:02:44 pm
content: I really don't know what happened there, they were all wrong!They are now all correct

author: TheSteve
author_rank: Unknown
timestamp: March 13, 2021, 07:32:38 pm
content: Quote from: volvo_nut_v70 on March 13, 2021, 05:02:44 pmThe forum likes to mix up attachments.
SDS1104X-E - SDS1202X-E - Single Trigger - No History? - Page 1
Forum section: electronics / testgear

author: agsnow
author_rank: Newbie
timestamp: March 12, 2021, 12:30:47 pm
content: Hello All,I was just about ready to pull the trigger on a SDS1104X-E or SDS1202X-E until I can across Dave's video (). Can someone who owns one of these scopes verify that the only data captured in single trigger mode is what's on the display? Meaning none of the history is used like in run mode. See the attached image from the video.Thanks

author: tautech
author_rank: Super Contributor
timestamp: March 12, 2021, 07:29:23 pm
content: See this post:https://www.eevblog.com/forum/testgear/simple-oscilloscope-question/msg3503204/#msg3503204

author: nctnico
author_rank: Super Contributor
timestamp: March 12, 2021, 07:37:12 pm
content: I don't think that answers the OP's question. The question is: does pressing the 'single' button clear the history buffer? yes or no.Based on Dave's video the answer seems to be 'yes' (the history buffer gets cleared) which circles back to an earlier discussion where it turns out Siglent is very trigger happy to clear the history buffer.
Fluke 233 battery life - Page 1
Forum section: electronics / testgear

author: targit
author_rank: Regular Contributor
timestamp: March 11, 2021, 02:59:42 pm
content: Hi, I'm looking at getting a Fluke 233 and reading conflicting reviews as to whether they have fixed the quiescent battery drain issue.Has anyone got one of the newer models they can confirm no longer has the issue?Thanks

author: targit
author_rank: Regular Contributor
timestamp: March 13, 2021, 03:04:46 am
content: In case anyone else is looking for this, I contacted a seller who has told me that Fluke did the hardware / software mod in 2013.Although I have found a few reviews still complaining about short battery life that were posted after 2017 so not sure if they were complaining about new gear or an old unit they bought.I pulled the pin and bought one as the dedicated display seems more convenient than the Keysight bluetooth app/dongle that always seems to get interrupted by a phone call just as I'm getting the reading I want.Cheers .
Test Leads for Keysight U1733C - Page 1
Forum section: electronics / testgear

author: Martin72
author_rank: Super Contributor
timestamp: March 12, 2021, 11:42:42 pm
content: Hi Folks,Several weeks ago we´d bought a keysight LCR meter, U1733C.It comes with VERY SHORT testleads.Sometimes a pain the arse thing...So I´m looking for longer ones - But I also recognized, that the U1733C doesn´t have the connection for kelvin clips, like my private DE-DER5000 did.What are your thoughts on it, how long could be the testleads without causing any disadvantages to the accuracy?

author: gslick
author_rank: Frequent Contributor
timestamp: March 13, 2021, 12:27:53 am
content: Would the U1782B SMD Tweezer be suitable for your needs?https://www.keysight.com/en/pd-2143789-pn-U1782B
Rigol DG832 Waveform Generator firmware? - Page 1
Forum section: electronics / testgear

author: TheCalligrapher
author_rank: Regular Contributor
timestamp: March 10, 2021, 02:50:21 am
content: HelloMy new Rigol DG832 reports its current firmware version as 00.02.05.00.00RigolNA firmware download pagelists the latest firmware for DG800 series as 00.02.04.00. Clicking on the version link immediately downloads a 'DG800_DG900_FW.zip' file with 'FW_DG8_DG9_march_2020' folder inside, containing some 'DG2000' release notes and 'SardineUpdate.GEL' file of 64Mb. Release notes state that it is v00.02.04.00.00.RigolNA DG800 series product pagehas its own firmware download link as well, which takes me to a page asking for my name, email, plus model and serial number of my Rigol device. After which it downloads a 'DG832_FW.zip' file with 'SardineII(ARM)Update(Normal)00.02.02.00.00' folder inside and 'SardineUpdate.GEL' file of 30Mb. "00.02.02.00.00"?Does anyone know what all this means? What is this salad of model names, version numbers and update files? Which one is the proper firmware for this device?Thank you

author: commongrounder
author_rank: Frequent Contributor
timestamp: March 11, 2021, 01:41:39 pm
content: It has happened before where Rigol has shipped equipment with a more recent firmware than is available on the download sites. I would suggest not changing anything right now as it would be a downgrade.

author: TheCalligrapher
author_rank: Regular Contributor
timestamp: March 12, 2021, 03:27:09 am
content: Quote from: tv84 on March 11, 2021, 02:48:51 pmYour link is the same as the #2 in my original post. The readme file inside says that this is version 00.02.04.00.00. My device reports 00.02.05.00.00. So apparently yours is not latest.

author: tv84
author_rank: Super Contributor
timestamp: March 12, 2021, 10:13:11 am
content: 02.05Code:[Model Supported] DG811,DG821,DG831,DG812,DG822,DG832,DG952,DG972,DG992,DG2052,DG2072,DG2102[Latest Revision Date] 2020-05-30[Updated Contents]v00.02.05.00.002020-05-30- Solve the problem that the machine model changes to DG811 when upgrading to 00.02.04.00.00
Hameg Scope - Page 1
Forum section: electronics / testgear

author: mhuber1
author_rank: Newbie
timestamp: March 12, 2021, 06:13:52 pm
content: Hi there,I have a hameg 604 with a broken Backplate, so I need a 3D model so I can print a new one. afaik all Hameg scopes from that era have the same Backplate.

author: ResistorRob
author_rank: Regular Contributor
timestamp: March 12, 2021, 06:30:24 pm
content: Is it plastic? Can't you just glue it?

author: mhuber1
author_rank: Newbie
timestamp: March 12, 2021, 06:43:33 pm
content: It's plastic (ABS I think) but I the thing was broken when I got the scope
School me on Electronic Load Testers  - Page 1
Forum section: electronics / testgear

author: valley001
author_rank: Frequent Contributor
timestamp: March 09, 2021, 11:35:33 pm
content: Hello all,I am in need of a device that will drain a battery and then report capacity. Well, I guess I don'tneedone.....I could always just strap on the inverter and drain it while monitoring with my current meter but what fun is that? I never shy away from an opportunity to irrationally purchase test equipment.Anyway....I see the amazon and ebay offerings for these devices that are basically a pcb with readout and massive heatsink/fan for $40-$90, however I prefer something more impractical like legacy lab equipment. I see the HP/Agilent 6051A and 6060B. Are these devices suitable? I see they are pricy in comparison to the 6033a/6038a I bought to charge batteries. I like the legacy stuff because I can fix it in most cases, and I know it will be reliable. AND it helps my home remain firmly planted to the earth.I am a big fan of the legacy HP gear. Am I missing some others that are equally good but perhaps more affordable?

author: larsdenmark
author_rank: Regular Contributor
timestamp: March 10, 2021, 07:32:44 am
content: I haven't tried it but it may be an idea to use a 6631B or 6632B power supply. These power supplies can also sink current.You'll probably need to fiddle with some GPIB programming, but one of these devices should allow you to charge and discharge batteries and get the measurements you need.

author: Grandchuck
author_rank: Super Contributor
timestamp: March 10, 2021, 12:12:17 pm
content: I recently purchased this one and so far am pleased with its performance.https://www.newark.com/multicomp-pro/mp710259-us/dc-electronic-load-300w-120v-30a/dp/52AH6649?st=electronic%20loadThere is also a 150 Watt model at lower cost.
Thandar TF 200 Frequency Counter Help - Page 1
Forum section: electronics / testgear

author: Don Philbin
author_rank: Newbie
timestamp: March 08, 2021, 03:29:48 pm
content: Hello all.During this "Pandemic" I thought I would do some clearing out of old gear. I was digging through my attic/loft and came across my old Thandar TF 200 frequency counter, but for the life of me I can't find the power adaptor. I know it takes 6 "C" type batteries for a total 9vdc, so I am wondering if anyone knows if the power adaptor would be 9vdc and also where I might obtain a mains adaptor for this? According to Google the batteries, if I used them, would last about 200 hours of use.I appreciate any help anyone can give me on this.Regards,Don

author: Fraser
author_rank: Super Contributor
timestamp: March 08, 2021, 04:15:20 pm
content: The service manual is to be found here....https://k1.spdns.de/Vintage/Sinclair/Other%20Inventions/Other%20Electronics%20Products/Thandar%20TF200%20Frequency%20Meter%20Service.pdfAs can be seen in the schematics, the 6 x C cell battery sits across the input of the regulator but may be disconnected and replaced by an external power supply if desired. The TF200 is not designed to recharge the internal batteries using the external supply. The minimum operating voltage from the battery is 6V so you can consider that the minimum external voltage that will work. New Alkaline cells will produce at least 1.5V so a safe external supply voltage is at least 9V. Any regulated external power supply of 6V to 9V D.C. should be fine. From memory, the original power supply was 9V/200mA rated but I will see if I can confirm this. Current draw is detailed in the service manual and is a Paul try 43mA maximum. Due to the low current draw, I do not recommend a 9V unregulated power supply as they can output 12V or more when powering a light load.Fraser

author: Fraser
author_rank: Super Contributor
timestamp: March 08, 2021, 04:21:24 pm
content: This chap built a custom 9V power supply for his TF200 and other Thandar kit......http://azurelectronics.com/Thandar%20Stack.htmFraser

author: Don Philbin
author_rank: Newbie
timestamp: March 10, 2021, 02:24:37 am
content: Thanks for the replies.I just noticed on the circuit diagram that if using a 9v DC power adapter I need to make sure the outer is +9v DC, as most adaptors have the negative voltage on that and the centre is the positive.I may end up making my own if I can't find anything suitable.

author: CJay
author_rank: Super Contributor
timestamp: March 10, 2021, 07:24:35 am
content: Hah, yes, the polarity on these is reversed to most normal PSUs, if you get it wrong it kills the ICM7216 chip and they're hard to get (you can get similar but then you'll have issues with decimal point indicators)
Hantek DSO4254C or DSO6204C - Opinions?  - Page 1
Forum section: electronics / testgear

author: Michael YYZ
author_rank: Regular Contributor
timestamp: March 06, 2021, 08:00:12 pm
content: Hello Everyone!I am a hobbyist and would like to get myself a DSO. It would be nice to be a better performant (i.e. good specs) and reliable device, which I would use occasionally. I’d prefer a 4-channel scope, bandwidth 200 MHz or more, sampling rate of at least 1 GSa/s, AWG. My budget is severely limited, basically the price to not exceed CA $1,000.I’ve done a lot of reading and searching which led to my focusing on two models from Hantek: DSO4254C or DSO6204C. DSO4254C is rated for250 MHz (which is nice!) but apparently its record length is only 64K. DSO6204C is rated lower (200 MHz), has a record length of 64M, but seemingly no external triggering capabilities.I am finding hard to decide between the two models. I would assume that for my basic, infrequent repair jobs, the DSO4254C scope with 64K would be plenty sufficient. But I don’t have a feel for what 64K really means practically and how serious a severe limitation this might be.I’ve found the DSO4254C at a good price on Ali Express, at approx. 70% of my budget limit. But I cannot find the DSO5204C anywhere for sale, which seems weird. I sent a question to Hantek in this regard but I’ve yet to receive a response.I would be very happy to hear your feedback and suggestions on:Is my choice sound based on my limited budget?Are these Hantek models generally reliable and good value for the money?Where could purchase the DSO6204C from?Other brands/models that you would recommend instead?Any other insight or recommendations?Thanks for your help, it’s much appreciated.

author: Michael YYZ
author_rank: Regular Contributor
timestamp: March 09, 2021, 09:34:26 pm
content: I’m surprised no one has chimed in. As a long-time lurker, I had the impression that this discussion board was more active...In any case, Hantek responded to me that the DSO6204C model is currently not available because it’s been “improved”. Also, a vendor indicated non-availability for this model due to lack of parts.Therefore, I’d have to look at other brands / models. After speaking to some of my friends, and inevitably bumping up my budget, I am looking at Siglent SDS2104X Plus. There’s also a SW promo running until the end of the month for it. So currently I am busy reading 99 pages of discussion board:https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/Question:Are there any other models similar (+/-) to SDS2104X Plus that you’d recommend me to look at?
Rohde & Schwarz NAUS RF Power Meter--Alignment procedere? - Page 1
Forum section: electronics / testgear

author: popoka
author_rank: Newbie
timestamp: March 14, 2021, 09:28:44 pm
content: Hello from Germany,is anybody out there familiar with the alignment procedere or that can help me with the service manual or alignment sheet for the R&S NAUS 6 ? It it an older, but very good power meter.It would be very nice if somebody has some hints or a .pdf or a paper copy for me.Thanks a lot!Olaf
Gossen Metrawatt external power supply NA4/500 & NA5/600 - Page 1
Forum section: electronics / testgear

author: tpd
author_rank: Contributor
timestamp: March 03, 2021, 08:26:52 pm
content: Hello,Can anybody say which type of connector is used with these power supplies, and to shad some light on their characteristics?I need an external power supply for my Metrahit 18C calibrator.

author: sssaaa
author_rank: Newbie
timestamp: March 07, 2021, 03:17:05 am
content: 2.5mm

author: tpd
author_rank: Contributor
timestamp: March 07, 2021, 07:50:01 am
content: Thanks, it is connector for mono headphones, I guess.Quote from: sssaaa on March 07, 2021, 03:17:05 am

author: tpd
author_rank: Contributor
timestamp: March 07, 2021, 10:29:43 am
content: Can you say more about the length of it, here are jacks with 15-19 mm in length available:https://www.aliexpress.com/item/4001126790333.html?spm

author: sssaaa
author_rank: Newbie
timestamp: March 09, 2021, 03:05:59 am
content: 12mm

author: sssaaa
author_rank: Newbie
timestamp: March 09, 2021, 03:13:43 am
content: Quote from: sssaaa on March 09, 2021, 03:05:59 am

author: tpd
author_rank: Contributor
timestamp: March 09, 2021, 08:46:59 am
content: Damn Metrawatt, I new it is not a standard length. I just have ordered 15 and 16 mm jacks from aliexpress, I couldn't find any shorter.

author: Wytnucls
author_rank: Super Contributor
timestamp: March 09, 2021, 09:23:07 am
content: The newer ones are even worse, 3 pronged unobtainium.

author: tpd
author_rank: Contributor
timestamp: March 09, 2021, 09:31:41 am
content: Can you say will it be a problem if 5V standard USB power supply is used instead of NA's 4,2V?

author: Wytnucls
author_rank: Super Contributor
timestamp: March 09, 2021, 09:33:38 am
content: I can't say for sure. My 30M has a 5V/600mA supply requirement.
Power and energy measurement Rigol DM3058E Labview, python - Page 1
Forum section: electronics / testgear

author: korpala
author_rank: Newbie
timestamp: March 08, 2021, 07:49:07 pm
content: Hello everyoneMeasurement of power and energy is relatively well known, there are a lot of DIY measuring systems and the meters themselves. But most often it concerns significant power ... above 1W. When building battery-powered systems, and additionally with a hasvesty energy type, you can talk about the power in mW. And the dynamics will appear asie a few seconds, a few watts and then a mile. In trying to solve this problem based on your hardware, it turned out to be a minor problem. The UNI-T UT71E multimeter does have an adapter, but for 230V and probably kW I also have a RIGOL DM3058E. Good multimeter, but in the manual not a word about power measurement ... It has the ability to measure two quantities (2ND). The meter itself cannot do anything about it, except for the display, but ... when connected to a computer, many possibilities open up that I would like to share.The RIGOL DM3058E multimeter, after connecting via USB, can be operated, among others, by VISA (https://pl.wikipedia.org/wiki/Virtual_Instrument_Software_Architecture)After analyzing the documentation,https://www.batronix.com/pdf/Rigol/ProgrammingGuide/DM3058_ProgrammingGuide_EN.pdfI have created a program that supports the meter by carrying out long-term measurements, e.g. battery capacity, energy consumption of measurement systems ...The first approach in Labview, - due to reporting and integration with other elements.The second approach in Python - for stability reasonsOf course, the topic is trivial, it involves sending a few commands to the meter and reading the answer, but, ... I didn't find the ready, so I'm sharing itimport pyvisaimport timerm = pyvisa.ResourceManager()print(rm.list_resources()) # select the appropriate port and enter it belowinst = rm.open_resource('USB0::0x1AB1::0x09C4::DM3R221100226::INSTR') # this is an example port from my resourceprint(inst.query("*IDN?"))#inst.write(":FUNCtion:VOLTage:DC") # ustawienie na 1 VDCprint(inst.query(":FUNCtion?"))#inst.write(":FUNCtion2:CURRent:DC") # ustawienie na 2 VDC# the rest of the configuration inhttps://www.batronix.com/pdf/Rigol/ProgrammingGuide/DM3058_ProgrammingGuide_EN.pdftry:while True:dcvolt=float(inst.query(":FUNCtion2:VALUe1?"))dccur=float(inst.query(":FUNCtion2:VALUe2?"))print()print(" Voltage = ",dcvolt," Current = ",dccur, " power = ",dcvolt*dccur)time.sleep(1)except KeyboardInterrupt:print("Press Ctrl-C to terminate while statement")pass
Finding the age of a Tek DMM4040 \ Fluke 8845A multimeter? - Page 1
Forum section: electronics / testgear

author: killingtime
author_rank: Regular Contributor
timestamp: March 08, 2021, 05:09:52 pm
content: Hi,Does anyone know if it's possible to have a Tek DMM4040 \ Fluke 8845A multimeter (they're the same AFAIK) show the number of hours powered on?I don't see this facility in the user manual.From what I've read, these meters can be manufactured many years before they're bought and pushed into service. Going from the manufacturing date can be misleading.I'm speaking with a seller who has a 'new' 4040, but it has no warranty.....left on a shelf apparently. They're not an official reseller. I spoke with Tek and they said provided the meter was new, buying it from a 3rd party would not be a barrier to a warranty, which is what I'm after.The only way to tell if it is 'new' is to see if it's been left switched on and for how long, but I don't know how you'd figure that out.Thanks.

author: bdunham7
author_rank: Super Contributor
timestamp: March 08, 2021, 05:19:29 pm
content: I bought one like that (8846A) but I didn't even consider the warranty, I just assumed there wouldn't be one because it was not an authorized seller. I'd be amazed if Tek honored a warranty on a years-old product from a 3rd party seller. I suppose if you register it and have a receipt, they might consider it legit.There's no power-on hours feature AFAIK. How old is it? They've been out for well over a decade and even the latest firmware 400mA models can be almost 10 years old. As long as you are getting a very good deal, the only real concerns I would have would be that the display is not worn (burned) and that there has been no physical abuse, like dropping.
BK 2709B still best sub $100 meter out there? - Page 1
Forum section: electronics / testgear

author: jayjr1105
author_rank: Regular Contributor
timestamp: March 08, 2021, 07:32:22 pm
content: I know it's been a long time since Dave did his DMM shootout vids. Wondering if something out there is better valued these days sub $100. Currently it's $83 shipped on Amazon.
Sketchy looking power supply. - Page 1
Forum section: electronics / testgear

author: josh132
author_rank: Contributor
timestamp: March 08, 2021, 01:49:13 am
content: I'm pretty sure this is one of the el cheapo power supplies from amazon. But it seems pretty legit. I know the capacitors are likely shit quality along with the binding posts and plastic, but I've heard its fairly decent. Link:https://www.amazon.com/gp/product/B08DJ1LP2Y/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

author: coromonadalix
author_rank: Super Contributor
timestamp: March 08, 2021, 01:51:27 am
content: love the high precision capacitors loll

author: MikeK
author_rank: Super Contributor
timestamp: March 08, 2021, 01:53:57 am
content: Just spend the extra money and get the Korad that so many others have. I have the programmable one, but the non-programmable one is less money and still good.

author: calexanian
author_rank: Super Contributor
timestamp: March 08, 2021, 02:18:16 am
content: Most of these supplies put out tons of hash and ripple. Just fine for powering something up but near useless without a proper filter if you want to look at anything on a scope. The hash is so severe it will just put noise on everything on your bench.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: March 08, 2021, 02:21:52 am
content: seem unavaible, so no priceinfo and if its "sketchy" in regards to what they are asking..but at sub 50USD delivered (guessing=) ur likely getting what your paying.I went for some of the linear KOrad variants that were around 60 to 70USD, but some of that is likely shipping costs, as they do weigh quite a lot...I purchased these two (P with USB PC control interface) and were around 70USD delivered each, though it is numerous years back, so likely way better purchases today...video of the inside of the more crude variant/weight..https://imgur.com/gallery/B7ZOQ3JThe biggest con is the 5A limit, though I can daisy-chain and reach higher ampere , when IM dealing with laser diodes that needs above 5.1A and also quite a con the lack of dedicated on/off button on one of the units.

author: nctnico
author_rank: Super Contributor
timestamp: March 08, 2021, 01:15:36 pm
content: Quote from: calexanian on March 08, 2021, 02:18:16 amI agree. And it isn't fanless. I have one as well but it needed quite a bit of modification to make it safe and kill some of the (electrical) noise from the output. I retired it in favour of a fanless PSU from Gophert and Rek.
u1272a - SCPI command for peak value measurements - Page 1
Forum section: electronics / testgear

author: hirada
author_rank: Regular Contributor
timestamp: March 08, 2021, 10:20:24 am
content: Hello,as the topic suggests, does anyone, who owns such a DMM, by chance have the proper scpi command to remotely activate and readout the peak values from an AC or AC+DC measurement? Be it current or voltage, as if the minmax button on the device has been pressed for longer than a second?For readout via a terminal program such as putty or hyperterm, not the agilent software.Thanks
Fluke 97 Auto Training Video and Workbook - Page 1
Forum section: electronics / testgear

author: .Scott.
author_rank: Newbie
timestamp: January 23, 2021, 05:49:32 pm
content: Hi everyone.I have a Fluke 123 Scopemeter.Joe Smith had been given approval from Fluke to upload the Fluke 97 automotive training video.I am very grateful for that.I am wondering if anyone may have a PDF copy of the training workbook referenced in the video.I have been having difficulty locating a hard copy version.Thanks for your time and thanks to Joe also.Scott

author: fordem
author_rank: Regular Contributor
timestamp: March 07, 2021, 11:04:14 pm
content: Is there a link to this training video, I'd certainly like to take a look at it if it's possible.

author: joeqsmith
author_rank: Super Contributor
timestamp: March 07, 2021, 11:37:00 pm
content: Thanks to Fluke for allowing me to make it publicly available.
Possible GW Instek GDS-2102 (not A) hack - Page 1
Forum section: electronics / testgear

author: den2
author_rank: Newbie
timestamp: March 06, 2021, 01:31:03 pm
content: Hi everyone.I have an oscilloscope in my nalia GDS-2102 (2 channel at 100 MHz). I use GDS-2202 at work.Is it possible to somehow rerun (hack) GDS-2102 to accelerate it to 200 MHz.
front cover for tektronix 2455b with dmm - Page 1
Forum section: electronics / testgear

author: scottie4442
author_rank: Unknown
timestamp: March 05, 2021, 08:58:29 pm
content: I am tying to figure out if there is a front cover for a tek 2455b (same size as 2445b and 2465b) that has the option 01 dmm. I can find a cover for one without the dmm but not one with.
R&S RTB2004 - Possible to change Vertical scale for all channels simultaneously? - Page 1
Forum section: electronics / testgear

author: javadesigner
author_rank: Contributor
timestamp: March 04, 2021, 06:44:53 am
content: Hi all:I have a R&S RTB2004 which I am very happy withEverything works intuitively via the touch screen.There are a few things I can't quite figure out though:1) If I previously changed the vertical scale for all the channels to be different from one another - and later I want to reset them back to the same scale, is there a way to do that simultaneously ? (without going to each channel and doing it individually, 4 separate times)2) Is there a way to fluctuate between 2 traces if they are right on top of each other ? IE, if two square waves on two channels are exactly the same, one hides the other completely (unless I change the vertical scale/position for one of them). It would be nice if the 'scope fluctuated between showing one trace more strongly than another and back again, so both can be seen easily at the same vertical setting.PS: if this is a beginner question, the apologies posting in here - please let me know and I'll move it to the Beginner forum.

author: Rydda
author_rank: Contributor
timestamp: March 05, 2021, 08:07:44 pm
content: This may not meet your needs, but if you add the 'Save setup/ Load setup' functions to the tool bar, it takes just two taps on 'Load setup' to restore all channels to their saved settings.
TDS3000B trace "ripple" - Page 1
Forum section: electronics / testgear

author: perdrix
author_rank: Frequent Contributor
timestamp: March 03, 2021, 04:21:50 pm
content: Using a TDS3014B (up-hacked to TDS3064B FWIW), feeding it the calibrator signal.The trace moves up and down by a small amount at about 2Hz. 5V portion of square wave seems to be worse than the 0V portion?Has anyone seen this and/or have recommendations?ThanksDavid

author: sicco
author_rank: Regular Contributor
timestamp: March 04, 2021, 08:14:33 pm
content: The 1 kHz test clip signal comes from a front panel board with its own NEC microcontroller. Start checking the 5V power supply to that board first. I suspect you will see the same ripple. Check with another scope first so that you know for sure what’s root cause: the signal on tge test clip bad, or the scope ADC etc bad.If that’s not it then check the 2.5 V reference ic on the main board. It’s an 8 pin SOIC, on the middle of the board, near the corner of the metal covered part. Is it ripple free? Unlikely, but you never know. There’s another SOIC-8 closer to the very large IC MM9595. That’s just a dual opamp. Check for ripple on its outputs.The 2 Hz you see might be aliasing. The 1 kHz comes from a front panel crystal but the scope itself has its own crystal, 75.7575 MHz. See if the 2 Hz goes up or down a bit if you heat up either crystal.

author: perdrix
author_rank: Frequent Contributor
timestamp: March 05, 2021, 01:12:31 am
content: Thanks, that makes sense to me ...However a simple check of the 15V supply suggests I can see myself replacing quite a few electrolytic caps in the near futureHo hum
OWON HDS3102M-N Problem - Page 1
Forum section: electronics / testgear

author: menthol
author_rank: Newbie
timestamp: July 09, 2019, 01:56:39 pm
content: Hello !the last days i used my Owon HDS3102M-N Oscilloscope for troubleshooting, no problem and both channels are worked well. Next day i switched the HDS on and the device has now a big problem:Channel 1 shows a signal with +/- dev on the screen without probes connected.The signal can´t be moved with the position adjustment.Channel 2 sticks on the upper border of the display.Both channels are not react to a testsignal on the bnc jackets.I think it must be a software issue cause the device works well one day before.I tried "factory recall" and "calibrate" but with no success.I also tried to flash the "patch" again that owon had sent me a year ago. I don`t know if this patch performs a complete firmware replacement. By the way, for that patch you have to use a rs232 cable at the "com" AND a usb-cable at the "usb" port of the deive.Also a problem is to reach the owon service. I wrote a short mail but no answer yet.Perhaps anybody has a idea to manage this error.Alex

author: menthol
author_rank: Newbie
timestamp: July 10, 2019, 04:00:14 pm
content: Hi folks,perhaps for someone it`s useful. I played around with the OWON patch for the HDS3102M-N. In the folder of the patch there are some .bin files:HDS3102M_N_FP_V2.01.binHDS3102M_N_OS_V1.1.6.binfont10.13.binI thought that the patch (launcher.exe) would flash these files into the HDS3102M-N. So i played around and moved one file after another. And the patch process still works. Don`t know WHAT the patch really flashes?I also made a test with a rs232 terminal.I pluged in the RS232 cable in the COM-port of the HDS3102M-N AND the USB to the USB port. If you switch the unit on, you can read this in the terminal with 115200 8N1:******************************LILLIPUTDSO TARGEY BOARD VER 1.02442loader-1G08.c(185)-Main. . . 2442loader-1G08.c(1)-OS_ENTRY2442loader-1G08.c(559)-OS_FILE_SIZE=1824440So the question for me is what does that OWON Firmware Patch flash?Are these bin files flashable images with the firmware for the device and how they can be flashed in the HDS3102M-N.?

author: serg
author_rank: Newbie
timestamp: March 04, 2021, 09:58:07 am
content: good afternooncan I get the firmware and the programfor firmware for hds3102m-n
Philips / Fluke PM5139-21 , is that valueable? - Page 1
Forum section: electronics / testgear

author: cybermaus
author_rank: Frequent Contributor
timestamp: March 03, 2021, 08:41:46 pm
content: Being a occasional hobbyist, I was offered to bid on a Philips / Fluke PM5139-21 function gen, with the current price at €15 and 12 hours to go.Well, my first though: I already have a cheaper, but more modern function generator. But sure, €15, why not.But I see on eBay, they go for US$500~US$700.For a admittedly good brand, but still an outdated model.Is this thing somehow special and/or valuable?

author: srb1954
author_rank: Super Contributor
timestamp: March 04, 2021, 06:17:47 am
content: Quote from: cybermaus on March 03, 2021, 08:41:46 pmThe PM5193 is a pretty high performance, very versatile function generator. At that price I would grab it myself if I wasn't on the other side of the world.
BK Precision Dynascan Sweep Function Generator #3017 - Page 1
Forum section: electronics / testgear

author: AirScooter
author_rank: Contributor
timestamp: March 06, 2021, 03:41:01 pm
content: Hi Folks,I just picked up a BK Precision 3017 Sweep Function Generator for cheap. It works great but it looks like it spent it's life thrown in the back of a pickup truck or down in a coal mine.Are there aftermarket cases out there someplace for old test equipment. This thing works so well but I have to hide it in a closet until I need it.While I am on the subject of this Sweep Generator. Why does it appear t be abandoned on the net? BK does a pretty good job with unsupported/old equipment documentation and all the Model numbers around the 3017 are there but not the 3017. I have checked all the Sea Anchor sites and those like them and its the same story.Does anyone know if the 3017A is close enough to the 3017 for their documentation to be interchangeable?ThanksAirScooter

author: Kean
author_rank: Unknown
timestamp: March 06, 2021, 05:45:25 pm
content: I am not familiar with that unit, but many/most BK Instruments products are rebrands from ITECH, GW Instek, Tonghui, and others.In this case it looks an awful lot like a GW Instek GFG-8017G or 8019G - so maybe look for documentation for those and compare the internals of what you have.The GW Instek website seems to only have a page for the GFG-8015G which is a little different.https://www.gwinstek.com/en-global/products/detail/GFG-8015G

author: AirScooter
author_rank: Contributor
timestamp: March 06, 2021, 07:13:47 pm
content: Thank you KeenKind of you to reply. I never thought that BK was a rebranded distributor. Know that should make searching a lot easier.AirScooter

author: Kean
author_rank: Unknown
timestamp: March 06, 2021, 07:43:06 pm
content: Some of the companies that they rebrand are (or were in the past) subsidiaries of BK - e.g. ITECH.I think they probably had some original products as well in the early days, but all of the ones I've owned or looked at have been rebranded.
Helwett Packard Power Supply 0950-1879 ref.: 54503A - Page 1
Forum section: electronics / testgear

author: nomiz
author_rank: Newbie
timestamp: March 03, 2021, 03:08:59 pm
content: Hi all, I got a quick question for you guys: I am looking for S1 in my scope power supply please.Helwett Packard 54503A >> power supply 0950-1879 >> part list S1Please take a look at pictures. Actual part status open, unknown or dammaged20210301_114507.jpg(57.6 kB. 736x445 - viewed 144 times.)Thank you

author: nomiz
author_rank: Newbie
timestamp: March 03, 2021, 05:32:12 pm
content: Edit: S1 part written : MCI MTS 90A
Tektronix TLA700 Logic Analyzer to decode serial buses (I2C, SPI, etc)? - Page 1
Forum section: electronics / testgear

author: Uky
author_rank: Regular Contributor
timestamp: March 03, 2021, 09:29:28 pm
content: Greetings forum.I was about to order a new oscilloscope that can decode serial buses like I2C, SPI, etc when I remembered that I havean old Tektronix TLA700 Logic Analyzer. Has anyone used this (or similar Tek ca 1998) to effectively decode serial buses?The software in this instrument is W98 and I t h i n k there was an appnote somewhere that it could also run on W2000.What say the expertise?

author: natman69
author_rank: Regular Contributor
timestamp: March 03, 2021, 10:18:52 pm
content: Maybe this can help:https://xdevs.com/guide/tla_spi/
Siglent SLA1016 / SPL1016 teardown - Page 1
Forum section: electronics / testgear

author: tmbinc
author_rank: Frequent Contributor
timestamp: March 03, 2021, 01:57:12 pm
content: I've been chasing pictures of the SLA1016 "Logic Probe" (for the current low-end Siglent scopes) for a while, and finally gave in and ordered the stupid thing.Attached are pictures. People will notice that this is basically a stand-alone logic analyzer, with its own Zynq FPGA, acquisition RAM etc.; there's even an unpopulated ethernet PHY+jack.

author: tmbinc
author_rank: Frequent Contributor
timestamp: March 03, 2021, 01:58:44 pm
content: And here's the 16CH logic pod. Basically does Single-Ended to differential conversion.

author: mawyatt
author_rank: Super Contributor
timestamp: March 03, 2021, 04:04:21 pm
content: Looks much more involved than the SPL2016 Logic Probe for the higher end scopes!! If these SPL2016 Logic Probes are truly passive, then the higher end 2000 and 5000 Siglent series scopes must have all this active circuitry built-in and maybe someone could create a DIY Logic Probe equivalent of the SPL2016 for the higher end scopes.Think oz2cpu (Thomas) is doing just that over at:https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/2425/Best,
Three HP3468A's vs four other voltmeters - Page 1
Forum section: electronics / testgear

author: intabits
author_rank: Frequent Contributor
timestamp: March 03, 2021, 04:48:02 am
content: I found this interesting...Before trying to read the calibration data stored in the battery backed RAM of my HP3468A multimeters, I wanted to get an idea of their current calibration state.Here they are connected in parallel with two HP3456A's, an HP3455A, and a Fluke 8800A. I used some cheap ebay AD548 voltage reference modules as the measurement source.While their readings are within spec, they do not agree with each other very well, nor with the other four meters, which are in very close agreement.Nominal 2.5v from AD5484#1 (no "calibration certificate")Nominal 5v from AD5484#2 (also no "calibration certificate")AD5484#4 calibration certificate says it should be 10.0032v

author: coromonadalix
author_rank: Super Contributor
timestamp: March 03, 2021, 09:47:13 am
content: Witch meter in the loot as an recent calibrationOne meter as to be recently calibrated and serve as a reference for the others ...

author: Kleinstein
author_rank: Super Contributor
timestamp: March 03, 2021, 10:33:45 am
content: The 3468 like the very similar 3478 and the higher grade 3457 have ranges of 300 mV/3 V / 30 V /300 V.So the 5 V and 10 V are already using the input divider and are not that accurate in this range. The 2.5 V is more suited for these meters. The difference could be from a common aging part, a all using the same cal source that was a bit off.It is an odd internal construction (e.g. no range without gain at the input stage) and never meant to be highly accurate. They are still nice 5.5 digit meters, as the have good resolution in the 30 mV range.
MicroPrint  45CI HP-IB to parallel converter Question   - Page 1
Forum section: electronics / testgear

author: geshka
author_rank: Regular Contributor
timestamp: March 03, 2021, 07:52:22 pm
content: Hello there.I've got in my possession HP-IB to Parallel converter MicriPrint 45CI. Quite an ancient device from company called Intelligent Interfaces. It has parallel DB 25 connector on one side and GPIB-like connector on other side. Ther are few pictures in the internet but not too much if the info overall.I am wondering - is that posibile to use this adapter as GPIB to Parallel converter and if so, what kind of SW or driver will work with thatThanks.

author: gslick
author_rank: Frequent Contributor
timestamp: March 03, 2021, 08:42:41 pm
content: What are you interested in doing, using the parallel port interface of the MicroPrint 45 as a general purpose I/O interface controlled through its HP-IB / GPIB port interface?If you wanted to go the other direction to control a GPIB interface through a parallel port interface, National Instruments had a GPIB-1284CT box that did that. That product has been obsolete for a long time and might not have been supported beyond DOS and Windows 3.1 drivers. I actually have one of those boxes that I have never bothered trying to use.

author: geshka
author_rank: Regular Contributor
timestamp: March 03, 2021, 10:13:03 pm
content: So the latter, I guess.I want to use it to control GBIP devices via parallel port of the PC (which is also obsolete, but am still using laptop with parallel) . Anyway, thanks for looking into that.

author: gslick
author_rank: Frequent Contributor
timestamp: March 04, 2021, 02:10:27 am
content: What OS are you running on your old laptop? It appears that National Instruments only supported the GPIB-1284CT with NI-488.2 versions released for Windows 3.1, which could also be run up through Windows 95 / 98 / Me, and the GPIB-1284CT was never supported by NI-488.2 versions released for Windows NT / 2000 / XP.If you happen to be running Windows 95 / 98 / Me on your old laptop and wanted to try getting a GPIB-1284CT to work, I doubt I would ever get around to using the one I have. It would be reasonably cheap to ship it within the US, but might not be worth the shipping cost to Canada.
FSIQ / FSEM Rohde&Schwarz:Can not display analyzer display on external monitor  - Page 1
Forum section: electronics / testgear

author: hafrse
author_rank: Regular Contributor
timestamp: September 02, 2020, 10:42:13 am
content: Hello,When connecting external monitor using the PC monitor output, the system boots to WIN NT correctly but when it has loaded all the components and tries to display the analyzer display in the end of the startup process, is says :"An external Monitor has not been connected or configured..." (pleaase see picture)I tried to choose different settings, etc... same problem, any clues what could it be wrong?My system is running under BIOS 3.3, win NT , firmware 4.40.3Many thanks in advance!

author: Bernd
author_rank: Newbie
timestamp: March 02, 2021, 10:40:24 am
content: Hello hafrse,Press: SETUP / GENERAL SETUP / MONITOR CONECTEDThen it will work.Regards, Bernd
SDS1000X Sample Memory - Page 1
Forum section: electronics / testgear

author: andyred
author_rank: Contributor
timestamp: March 01, 2021, 12:05:11 pm
content: I've seen one of Dave's video comments which said that the memory sample for 1104x-e is not equivalent with the ones from 1202/1204x-e, even though you can hack the bandwith (attached screenshot).I've searched the forum for this topic but didn't find anything about it.Do you guys know anything about this?

author: tautech
author_rank: Super Contributor
timestamp: March 01, 2021, 07:08:44 pm
content: The facts are:SDS1202X-E has one 1 GSa/s ADC with 14 Mpts of memory support. $379SDS1104/1204X-E has two 1 GSa/s ADC's each with 14 Mpts of memory support. $499- 759The new SDS1104X-U has one 1 GSa/s ADC with 14 Mpts of memory support. $399While all 4 models offer almost identical basic capabilities there are differences in the feature set. RTFM

author: andyred
author_rank: Contributor
timestamp: March 01, 2021, 07:56:40 pm
content: thanks, already knew that, I've read almost all I could fins on both of them:)how about that statement above? fact or fiction?

author: tautech
author_rank: Super Contributor
timestamp: March 01, 2021, 07:58:12 pm
content: Quote from: andyred on March 01, 2021, 07:56:40 pmSDS1000X have been discontinued, and although they had an 8" display and 50 Ohm inputs they cannot compete against the X-E or the X-U for that matter in terms of performance.

author: andyred
author_rank: Contributor
timestamp: March 01, 2021, 09:29:02 pm
content: it seems that comment is for 1104x-e vs 1204x-e only. have you seen the attached screenshot to the first post?

author: tautech
author_rank: Super Contributor
timestamp: March 01, 2021, 10:14:28 pm
content: Quote from: andyred on March 01, 2021, 09:29:02 pmYes well I hoped the clue was in my first reply.X models were only 2ch and with 14 Mpts, SDS1202X-E is still only 2ch and also with 14 Mpts whereas SDS1104X-E and SDS1204X-E are both the same HW and have 2x 14 Mpts.In practice this means we can use all 4 channels and have the same memory available to each channel as the 2ch models provide.
Soar 3050 Digital multimeter troubleshooting help wanted - Page 1
Forum section: electronics / testgear

author: Danielradcliff
author_rank: Contributor
timestamp: March 02, 2021, 02:56:11 am
content: Help wanted

author: Danielradcliff
author_rank: Contributor
timestamp: March 02, 2021, 03:00:49 am
content: Pictures of meter

author: Danielradcliff
author_rank: Contributor
timestamp: March 02, 2021, 03:48:48 am
content: More pictures . I’m beginning to wonder there’s no mention anywhere on the Internet of this digital multimeter not even a picture I don’t know where my dad got it it was his originally And I have been using it for many years now it started out being sensitive to temperature changes and now it totally doesn’t want to work It . And it has no serial number either. I doubt it’s a prototype or something if it was how would it end up in West Virginia It should be in Japan someplace