hybridfree/eevblog-posts huggingface dataset:
Clamp Meter Accuracy in Lower Levels - Page 1
Forum section: electronics / testgear

author: Locator
author_rank: Contributor
timestamp: August 28, 2024, 06:40:25 am
content: Hello.In looking at a couple of clamp meters - the Fluke 374FC and 376FC, I noticed the 376 measures AC and DC current, up to 1000 amps. The 374 measures up to 600 amps. (I would never be measuring anything even as high as 600 amps.)Would the 374 tend to be more accurate in the lower ranges than the 376FC, due to the 376 having a higher limit?I prefer to get the 376FC kit, as it comes with the magnetic strap and the IFlex loop, but hope I wouldn’t be handicapped on the low ranges.Thanks.

author: Fungus
author_rank: Super Contributor
timestamp: August 28, 2024, 06:53:58 am
content: I'm sure there's specifications for both somewhere on the web...

author: BeBuLamar
author_rank: Super Contributor
timestamp: August 28, 2024, 09:27:57 am
content: I picked the 374 because it's cheaper and I don't need to measure more than 600A. The accuracy/resolution below 600A are the same. The resolution for both is only .1A. The 376 can measure frequency and higher resistance which I would use the DMM for. One thing I am dissapointed about them is they don't have good enough resolution when measure low current. If you measure something about a couple of Amps you only have 2 digits. The cheaper 325 has better resolution.

author: Phil1977
author_rank: Frequent Contributor
timestamp: August 28, 2024, 09:42:41 am
content: Don't forget that there is a physical relation between open clamp area and low current accuracy.Little clamp areas do not catch so much magnetic stray field. That´s why most clamps with mA-resolution barely fit around an AWG6 wire.

author: BeBuLamar
author_rank: Super Contributor
timestamp: August 28, 2024, 10:39:30 am
content: Also I have the Iflex but I never use it. Besides you can only measure AC current with it.

author: Locator
author_rank: Contributor
timestamp: August 29, 2024, 07:42:15 am
content: Quote from: BeBuLamar on August 28, 2024, 09:27:57 amI didn’t realize this. I was testing a 374 and a 325 on a small house fan. The 325 showed 2.89 amps. The 376 showed 2 amps. That’s very disappointing. I would need to do more lower measurements like this, than higher measurements. I wanted the inrush feature, which is why I was looking at the 376. It’s not on the 325. I wanted to check the inrush on some servers and beefy workstations at startup.Wow, only showing something like 2amp for an around 2.9amp load is going to be a handicap.

author: Locator
author_rank: Contributor
timestamp: August 29, 2024, 07:42:47 am
content: Quote from: Phil1977 on August 28, 2024, 09:42:41 amThat’s good to know - I didn’t realize that.
Keithley 2306 (2300 series) burst mode - Page 1
Forum section: electronics / testgear

author: w.v.s.
author_rank: Frequent Contributor
timestamp: August 28, 2024, 05:52:53 pm
content: Hello,according to the specification of the "PULSE CURRENT MEASUREMENT OPERATION", there is a burst mode, which features current measurements with higher rates.QuoteI did not find in the manual how to set up such a burst measurement. Does anybody know or has an idea?

author: ch_scr
author_rank: Frequent Contributor
timestamp: August 28, 2024, 06:48:12 pm
content: The "Pulse current measurement procedure" is explained in the manual (this versionof it, anyway) around page 69.

author: w.v.s.
author_rank: Frequent Contributor
timestamp: August 28, 2024, 08:02:01 pm
content: Thank you! They call it "Pulse current digitization" in the manual. I've missed that somehow earlier this day.
Leader 3236 (S1) - Service Manaul Needed - Page 1
Forum section: electronics / testgear

author: B1nary
author_rank: Contributor
timestamp: February 04, 2017, 04:56:16 pm
content: I've contacted the eBay sellers as well as done several searches on Google/Bing/Duck Duck Go and Yahoo. While I have the operating manual for my Leader 3236(S1) AM/FM Stereo Generator (modulation built in), it needs a alignment and the US Leader source does not a service manual. There are web sites claiming to have the service manual but none seem to actually have one when I asked. I tried, unsuccessfully to contact Japan but thus far they have not responded.If you have a service manual and are willing to share, I'd appreciate hearing from you.TIA.

author: Blagoje
author_rank: Newbie
timestamp: August 28, 2024, 11:41:02 am
content: Hi,I don't know if you monitor this any longer but I have something that might help you with your Leader 3236. I got it from Leader US, it is machine translated from Japanese, it is not much but can help a bit with the alignment. I also have 3236 and I'm struggling to get output level right, it is way lower. Attenuator(s) seems to be working but the RF level is way down. Other functions (the one that I tested/verified) seems to be fine.I used to look at the blog frequently years back but other priorities took over. In any case, if you need the adjustment procedure I'll be happy to share, as a matter of fact I'll attach it right now. I'm still looking for device schematics diagram and complete service manual, hopefully one day I'll find it.Regards,Blagoje
Firmware update of the UTG962 generator - Page 1
Forum section: electronics / testgear

author: PatrickB
author_rank: Regular Contributor
timestamp: August 25, 2024, 04:29:57 pm
content: Hello everyone,Who installed the UTG900E V3.06.004 update? because for me there is a problem!Before the update, the hardware and software versions of my UTG962 were:Software Version: 1.09Hardware Version : 1.01FPGA Version : 1.07This firmware update was installed correctly (but after creating the MD5 file) but the one for the FPGA is still in error ("installation failed"; no more detail) and the displayed versions on UTG are:Software Version: 3.06Hardware Version : 1.01FPGA Version : 1.07Has anyone encountered this problem?

author: bffargo
author_rank: Regular Contributor
timestamp: August 26, 2024, 12:24:35 am
content: Discussed to an extent in the main thread of the 962/932 series here starting at this post 2 months ago:https://www.eevblog.com/forum/testgear/uni-t-utg932utg962-200msas-function-arbitrary-waveform-generator-220394/msg5556741/#msg5556741

author: Fungus
author_rank: Super Contributor
timestamp: August 26, 2024, 02:18:39 am
content: Moral: If it ain't broke then don't fix it.

author: PatrickB
author_rank: Regular Contributor
timestamp: August 27, 2024, 04:59:04 pm
content: Exactly, the best is the enemy of the good.That's why I want to go back with the firmwareCan someone give me a link to download the firmware version 1.09
differences between hp E441x and epm44x powermeters - Page 1
Forum section: electronics / testgear

author: pe2ben
author_rank: Contributor
timestamp: August 26, 2024, 08:22:58 pm
content: Hello,does someone know the difference between:e4418a versus epm441ae4418a versus e4418be4419a versus epm442ae4419a versus e4419bThanks Ben
HP 6236B power supply - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: August 25, 2024, 01:23:20 pm
content: Got one yesterday from the estate sales for $20. It had a couple of problems and I fixed it. A very well built unit but it's quite limited.

author: Stray Electron
author_rank: Super Contributor
timestamp: August 25, 2024, 03:12:21 pm
content: I'm not sure what you mean by quite limited. But IMO that's agreatfind for $20 and those are very useful PSUs, particularly with OP amp circuits where you need multiple voltages and +/- voltages. And being made by HP, they're built to last forever and you can get FULL service information and all of the parts for them. The only downside to them is that they're transformer based so they are bigger and heavier than the switcher type PSUs but that also means that there is a lot less electrical noise in the outputs and less radiated RF noise.What's the date code on that PSU?FYI, the caps used by HP seem to hold up very well so don't go in there and just start randomly replacing capacitors!

author: BeBuLamar
author_rank: Super Contributor
timestamp: August 25, 2024, 09:55:46 pm
content: Limited because for the 0-20V only 500mA. I wish it's more like 3A and 30V. The 6V and 2.5A is good and it's also adjustable. Many other PSU there is only a fixed 5V. I don't mind it's transformer based because it would have low noise.

author: J-R
author_rank: Super Contributor
timestamp: August 25, 2024, 11:14:50 pm
content: $20 for some fun tinkering on 50 year old gear. But there is no adjustable current limit and only one output can be monitored at a time.
Keysight's New AP5001A-RF-Analog-Signal-Generator - Page 1
Forum section: electronics / testgear

author: msuthar
author_rank: Contributor
timestamp: August 28, 2024, 09:08:19 am
content: Keysight's new RF Analog Signal Generatorhttps://www.keysight.com/in/en/assets/3124-1566/data-sheets/AP5001A-RF-Analog-Signal-Generator.pdfNew form factor, something different from conventional signal generators 19" rack design.

author: zrq
author_rank: Frequent Contributor
timestamp: August 28, 2024, 10:09:01 am
content: The rear panel looks very Chineseium and the UI looks very different than the ordinary X series generators, not sure if it's OEM or original Keysight design.

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: August 28, 2024, 10:13:00 am
content: It's just a rebranded product.https://www.anapico.com/products/rf-signal-generators/single-output-rf-and-microwave-signal-generators/apsin-hc-models/

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: August 28, 2024, 10:15:22 am
content: Ana Pico was bought by Keysight recently.https://www.everythingrf.com/news/details/18573-anapico-becomes-part-of-keysight-technologies
CAMI Research Model M3U Research - Page 1
Forum section: electronics / testgear

author: Swang4004
author_rank: Newbie
timestamp: July 17, 2017, 10:01:00 pm
content: I am a long time lurker on this forum with a question about the CAMI Research Model M3U "Cableye" system. Does anyone have a manual for one of these as it looks like it needs to be under warranty to download it from the company and $150 warranty extension seems a bit much for the instructions.Thanks for any responses on this odd but effective piece of equipment.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: August 25, 2024, 12:44:50 am
content: If you own a CAMI CableEye call them rep will have you e-mail them with the serial # and proof you bought it they will transfer ownership. Allow you to download the software but only the version the unit shipped with or last upgrade that was paid for i got mixed answers. MY Serial M2 came with V4.3 my M3U is V5.3 but the M2 works with the V5.2 Software.
Sentinel ME-26 D/U vs HP-410B vs Macromin Electronics - Page 1
Forum section: electronics / testgear

author: W3KW
author_rank: Contributor
timestamp: September 23, 2022, 01:11:23 pm
content: So who knows the back story or history of how an HP-410B became the Sentinel ME-26D/U? Or, was it the other way around? Who was Sentinel and who was Macromin Electronics…the ME part?I see comments from users who serviced the ME-26D/U and I’m hoping someone can fill in some historical blanks for me.Thanks,WesW3KW

author: W3KW
author_rank: Contributor
timestamp: August 24, 2024, 05:43:12 pm
content: Also, see:https://www.eevblog.com/forum/other-blog-specific/(restoration)-1960s-multimeter!-sentinel-me-26du/msg5617063/#msg5617063
Rigol 1054Z capture using Pulseview - Page 1
Forum section: electronics / testgear

author: andybarrett1
author_rank: Regular Contributor
timestamp: August 14, 2024, 07:11:04 am
content: HiThank you for reading ....I am attempting to capture some serial data using a Rigol 1054Z ( No Plus or special ) and Sigrok PulseVeiwI eventually got the link working using TCPIP.... USB just was never going to work !But my issue is I can only capture what is on the scope screen, not the before and after and a decent amount of data.Has anyone had any luck allong these lines .... If it is possible, or am I just not seeing something ?Thank you for helpAndy

author: RoGeorge
author_rank: Super Contributor
timestamp: August 14, 2024, 04:25:05 pm
content: I've tried couple of years ago to use SIgrok with DS1054Z (over LAN/Raw TCP from Ubuntu). It did connect and was downloading something, but overall the functionality was very limited, close to useless. Vaguely remember not being able to download full memory.To download the full memory (to a PC file) I am using DSremotehttps://www.teuniz.net/DSRemote/, then postprocess whatever I want to see in Python.Using DSremote because it downloads raw data at the highest possibly speed, which for the a full 24 million samples means about 20-30 seconds over LAN. The oscilloscope can not send ~20MB faster than that.Manually writing code to postprocess the downloaded files is tedious for me, but I've only needed that no more than 2-3 times in the last years.For logic decoding I am using either the screen of the DS1054 and no PC for simple tasks, or a dedicated logic analyzer for more complicated debugging (mine happens to be a DSlogic).Beware that the DS1054Z internal decoder for the logic protocols only decodes whatever is visible at the moment on the display. It will missdecode, or not decode at all if the start of a character is not visible in the screen. To be more precise, the decoder of the DS1054Z works with the pixels that are drawn on the display, not with the captured data from the ADC.

author: andybarrett1
author_rank: Regular Contributor
timestamp: August 23, 2024, 01:02:22 pm
content: Thank for infoVery helpful points made !I am getting there slowly .... Some of what I am seeing is documented already, and is making senseThank You for your help (I can't find a thank you button)Andy
Siglent SDS5000X Vertical Calibration Issue - Page 1
Forum section: electronics / testgear

author: tautech
author_rank: Super Contributor
timestamp: August 23, 2024, 04:41:20 am
content: Did you have the Quick Cal feature OFF or ON ?Here's the latest FW version should you need to get it up to date:https://int.siglent.com/upload_file/zip/firmware/Oscilloscope/SDS5000X_V0.9.9R6_EN.zip

author: EEVblog
author_rank: Unknown
timestamp: August 23, 2024, 07:28:43 am
content: Quote from: tautech on August 23, 2024, 04:41:20 amNo idea about that feature at all, can't find any such option.What does it do?

author: tautech
author_rank: Super Contributor
timestamp: August 23, 2024, 07:51:36 am
content: Quote from: EEVblog on August 23, 2024, 07:28:43 amTBH I don't remember if SDS5000X has Quick Cal or it came later.Replaced mine with SDS6204A.QuoteAs it implies, a quick cal while the scope warms to normal operating temp.Generally ~2s pause while the cal is done/checked.

author: EEVblog
author_rank: Unknown
timestamp: August 23, 2024, 08:30:44 am
content: Quote from: tautech on August 23, 2024, 07:51:36 amIs that just offset, or is it vertical gain as well?How many scopes cal for vertical gain anyway?

author: noisyee
author_rank: Contributor
timestamp: August 23, 2024, 08:37:34 am
content: It seems some Siglent scopes FW update will wipe out old self-cal data, you can see the base line drift a lot from 0V after update.The factory calibration data is not affected by FW update, no worries after self-cal.I sometimes see a popup menu advice me to do a self-cal after update has completed, but most time not. Just hope they give enough information in the FW release notes.

author: noisyee
author_rank: Contributor
timestamp: August 23, 2024, 08:47:19 am
content: Quote from: EEVblog on August 23, 2024, 08:30:44 amShould be offset only and not all scopes have the option.Some LeCroy scopes seems cal for gain on the go as well, it takes much longer time to wait the scope cal itself after temperature or scale change.
RIGOL DHO802 & DHO812: sample rate & external trigger - Page 1
Forum section: electronics / testgear

author: Yuriy V.
author_rank: Contributor
timestamp: August 15, 2024, 04:48:47 pm
content: I ask owners of DHO802 & DHO812 models to answer the following question. Does the maximum sample rate of the channel(s) drop when external sync mode (Ext Trig) is enabled?I didn't find an answer in the documentation. I also couldn't find it on internet sources.

author: egonotto
author_rank: Super Contributor
timestamp: August 15, 2024, 08:13:36 pm
content: Hello,in the data sheet, the external trigger is only specified in edge mode. This indicates that the sample rate is not changed.However, I do not have a device to check this.Best regardsegonotto

author: Yuriy V.
author_rank: Contributor
timestamp: August 16, 2024, 05:43:54 pm
content: Still waiting replyes from DHO802 & DHO812 owners

author: Fungus
author_rank: Super Contributor
timestamp: August 19, 2024, 03:24:48 pm
content: Quote from: Yuriy V. on August 16, 2024, 05:43:54 pmMaybe there aren't any.Everybodybuys the 4 channel models.

author: Yuriy V.
author_rank: Contributor
timestamp: August 19, 2024, 05:42:13 pm
content: Quote from: Fungus on August 19, 2024, 03:24:48 pmI'll wait. I don't believe there's no one with 2-channel

author: Elextro
author_rank: Contributor
timestamp: August 22, 2024, 10:16:23 am
content: Hello, I have a DHO802, I bought it because I am not going to use the 4 channels and because it also saved me some money. If I set the oscilloscope to the 1khz test signal and activate the maximum memory depth of 25Mpts, the oscilloscope sets itself at 1.25 Gsa/s. In the trigger menu I activate the external synchronization input and I do not observe any variation of the 1.25Gsa/s. Of course, if I also activate channel 2 the sampling frequency does drop by half, to 625Msa/s and memory depth at 10Mpts. But it does this regardless of whether the external trigger is activated or not. My conclusion is that activating the trigger does not influence the maximum sampling frequency, only activating the two channels divides that factor in half. I hope I have helped you. Greetings

author: Fungus
author_rank: Super Contributor
timestamp: August 22, 2024, 01:23:33 pm
content: Quote from: Elextro on August 22, 2024, 10:16:23 amI think you should be able to get 50Mpts by generating a license key.

author: Elextro
author_rank: Contributor
timestamp: August 22, 2024, 03:34:34 pm
content: At the moment I manage well with 25Mpts. I don't want to lose the warranty...but in the future I will surely expand to 100Mhz and 50Mpts as you suggest. By the way, is there anything new to generate the license key? Thank you
Rigol DS2072A SPI decoding issue - Page 1
Forum section: electronics / testgear

author: twospoons
author_rank: Frequent Contributor
timestamp: March 24, 2021, 02:38:30 am
content: Trying to run SPI decoding with my hacked DS2072A, but for some reason it thinks both risingandfalling edges represent clocks. So for 8 actual clock pulses it decodes 16 data bits - which is quite wrong.Slope options for the SCLK in the decode menu are either rising or falling, as you'd expect. Theres no glitching in the clock that I can see.Anyone have any ideas as to what's wrong? Or is this just buggy firmware from Rigol (Software version is 00.03.05.SP3, hardware version is 2.3)

author: mindoo
author_rank: Newbie
timestamp: August 21, 2024, 07:35:05 pm
content: Hey,I'm currently struggling with a very similar problem on the DHO804 (not hacked yet). Were you ever able to find the cause for this ?

author: thm_w
author_rank: Super Contributor
timestamp: August 21, 2024, 09:41:52 pm
content: Quote from: mindoo on August 21, 2024, 07:35:05 pmDHO804 has nothing to do with DS2000, the software is completely different.Better off to look in the existing DHO800 threads that we have:https://www.eevblog.com/forum/testgear/rigol-dho800900-oscilloscope-bug-reports-firmware/?action=printpageSPI working here:https://www.eevblog.com/forum/testgear/rigol-dho804-test-and-compare-thread/msg5177292/#msg5177292So probably user error or an existing bug you are not aware of.

author: mindoo
author_rank: Newbie
timestamp: August 22, 2024, 02:08:58 pm
content: Will look through those / have been looking through those. Yeah I posted quickly as a shot in the dark, I strongly suspect user error, and thought maybe OP had made a similar user error. The thing is I used to have it working great, just rebooted my scope and now have not been able to get it working again. Double checked all settings, tried literally every combination or thing I could think of and I still for some reason have my scope hat believes 8 bits are being coded on 2 clock cycles. It seems to be taking into account both rising edges and falling edges, though it's not super consistent in that behaviour (sometimes +1 bit or -1 bit relative to clock cycle count).'l'll post screenshots when I am home, I'd be hardly surprised if it is indeed user error, but at the same time, the options are pretty limited for the settings, I've replicated the same settings that got it working at first, and then tried everything else I could think of and still have this odd behaviour.
Cami Research CableEye M3U Cable Tester Unboxing and Tests. - Page 1
Forum section: electronics / testgear

author: KG7AMV
author_rank: Frequent Contributor
timestamp: August 25, 2024, 01:00:00 am
content: I Got an Older Cami Research Cable M2 Cable Tester in July.. Thing was so Cool I ended up getting an CableEye M3U Really Want the M4. As a Bonus the V5.3 software works with the Serial M2.Here is the Unboxing and Initial Tests... Teardown will be Soon.
Meguro MK-668C Wow & Flutter manual - Page 1
Forum section: electronics / testgear

author: dj831
author_rank: Regular Contributor
timestamp: March 12, 2021, 05:03:12 pm
content: Hi everyone,Is there someone on the forum who has a scan of manual of Meguro MK-668C Wow & Flutter meter? I've asked to Keisoku Giken (Meguro is now one of their brand), but they have no data about that meter, only about the MK-668F. They took time to answer, though, wich is nice.Thanks!

author: kinap35
author_rank: Contributor
timestamp: August 22, 2024, 06:43:19 am
content: Hi!I'm also looking for the very same manual, with no success until now. I especially would like to have schematic and maintenance/calibration informations, since it is a pretty old device and would probably require some care to work at its best.Have you finally succeded to find one during these last 3 years?Thanks!

author: dj831
author_rank: Regular Contributor
timestamp: August 22, 2024, 12:40:42 pm
content: Hi, nope, sadlyI sill have mine sitting somewhere in my house (or rather, buried in a stockpile), waiting for a manual too. And to be honest, I completely forgot it - I bough since a Bruel & Kjaer wow/flutter meter.If I see something a day, I report it here.Cheers
Keysight HD3 - "Something big is coming" - Page 1
Forum section: electronics / testgear

author: Brumby
author_rank: Unknown
timestamp: August 21, 2024, 11:57:39 pm
content: Found this in my email this morning.Go here to find out morehttps://connectlp.keysight.com/HD3

author: thm_w
author_rank: Super Contributor
timestamp: August 22, 2024, 12:18:06 am
content: https://www.eevblog.com/forum/testgear/new-keysight-infiniivision-hd3-oscilloscope/

author: Brumby
author_rank: Unknown
timestamp: August 22, 2024, 12:23:33 am
content: I should have checked first.

author: tggzzz
author_rank: Super Contributor
timestamp: August 22, 2024, 08:45:05 am
content: Quote from: Brumby on August 22, 2024, 12:23:33 amNever done that. Oh no. Never everever. Perish the thought.

author: tszaboo
author_rank: Super Contributor
timestamp: August 22, 2024, 08:51:50 am
content: Quote from: Brumby on August 22, 2024, 12:23:33 amI recommend closing this thread and banning Brumby.(lol no. It's a joke.)
What's the difference in DMM specifications? Pxi-4070 vs Keithley 2001 & 2010 - Page 1
Forum section: electronics / testgear

author: NANOJOLTS
author_rank: Contributor
timestamp: August 21, 2024, 01:10:33 am
content: What's the difference in these DMM published specifications? Pxi-4070 6 1/2 digit, vs Keithley 2001 7 1/2, & 2010 7 1/2?Is the 24hr specification an intrinsic characteristic of the DMM's stability?

author: coromonadalix
author_rank: Super Contributor
timestamp: August 21, 2024, 04:37:39 pm
content: hiWas it a pxi-4071 instead of pxi-4070since the 2001 and 2010 are 7.5 digits4070 vs 4071 attached picture, theses are the obvious onesK2010 was supposed to have better specs form the older 2001 ?attached comparisons from the main file : 1KW-61264-4_DMM_Comparison_Table_021721.pdf

author: NANOJOLTS
author_rank: Contributor
timestamp: August 21, 2024, 05:41:28 pm
content: Yes, I was comparing the NI Pxi-4070 6 1/2 dig. to the two Keithley 7 1/2 dig. DMM's.
Reverse Engineering a HP HIL Interface Keyboard with a Rigol DS1054Z - Page 1
Forum section: electronics / testgear

author: andybarrett1
author_rank: Regular Contributor
timestamp: August 04, 2024, 04:18:53 pm
content: HiThank you for reading ....I want to look at the HP-HIL interface / Protocol with the idea of building a keyboard with a few less keys (Its to make operation a little less cluttered)In short I need to understand and replicate a few keys from an existing HP HIL KeyboardThe Serial options on the DS1000Z seem a little too specific linked to SPI / RS232 etcSo was wondering if I could simply use the waveform record .... Hit the keys on the keyboard that are of interest and play back later ?Or is there another way ...My Rigol is currently locked away a good way from here ...... So looking for ideas or if yes / no befor I go digging it out :-)Thank you againAndy

author: edavid
author_rank: Super Contributor
timestamp: August 04, 2024, 05:16:05 pm
content: Hasn't this already been done?https://github.com/tmk/tmk_keyboard/wiki/HP-HIL

author: andybarrett1
author_rank: Regular Contributor
timestamp: August 12, 2024, 07:19:02 am
content: That helps 😁Thank you 👍Andy

author: DavidKo
author_rank: Frequent Contributor
timestamp: August 21, 2024, 12:14:48 pm
content: You can checkhttps://groups.io/g/VintHPcom/topic/hp_hil_and_usb/68643874.It is the thread tohttp://www.dalton.ax/hpkbd/hil/. I have not build one with USB only with PS/2. For proper PS/2 mouse functionality you need to add pull up resistor - some mice can work without it. I'm not sure if the schematic on dalton site is already updated.HP-HIL documentation
Trigger Data hold on Philips Meters sans DataHold Probe? - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: August 19, 2024, 08:29:17 pm
content: Is there a way to trigger DataHold on meters like the PM 2525 using the Din connector pins and a standard probe?I have looked at various pinouts for this connector but they all address 4 wire resistance and temp probes.TIA.Dewey

author: abeyer
author_rank: Frequent Contributor
timestamp: August 21, 2024, 01:42:28 am
content: At least some of the models using that connector have service manuals with schematics available with the full connection details.IIRC, pins 5-6 are an I2C bus and the data hold probe is active, sending messages on that bus which drive a bunch of relays controlling internal signal routing.

author: watchmaker
author_rank: Unknown
timestamp: August 21, 2024, 10:26:09 am
content: Thank you. I will look at the SMs of some of the other meters that use that probe. I do have two other meters that hold (Flukes) and I would like to add this to the Philips.Regards,Dewey
Hantek DPO6204B - Page 1
Forum section: electronics / testgear

author: stre_l0k
author_rank: Newbie
timestamp: August 20, 2024, 04:36:49 pm
content: Hello! Please help me with the choice. The local store has the oscilloscopes I'm interested in:1. Hantek DSO4204C (one of the advantages is the presence of a generator).2. Hantek DPO6204B (i didn’t quite understand what kind of luminescent screen it was).3. Rigol DHO804 (there is a lot of information on it on the forum).I couldn’t find any information on the hantek dpo 6204b on the forum, or a video of the operation on YouTube. They all cost about the same, about $600. The bandwidth is approximately the same (with hacked rigol). Hantek's advantages include manual (rather than touch) control, plus knobs for each channel. Can you tell me which one is better for the job? Very rarely (once or twice a year) it is necessary to look at signals with a frequency of 100 MHz, so I don’t even consider oscilloscopes from the lower band. I read the topic for beginners. I am involved in electronics development, so from time to time I have to spend a lot of time with prototypes and monitor various signals and interfaces (spi, i2c, can, rs485).

author: coromonadalix
author_rank: Super Contributor
timestamp: August 20, 2024, 04:40:34 pm
content: https://www.electronicdesign.com/technologies/test-measurement/article/21801785/whats-the-difference-between-a-dso-and-dpohttps://docs.keysight.com/kkbopen/oscilloscope-dso-versus-dpo-whats-the-difference-584422867.htmli would say check for hackability to get more value from your investment

author: stre_l0k
author_rank: Newbie
timestamp: August 20, 2024, 04:51:58 pm
content: Thanks for the clarification between DPO and DSO! As I understand it, Rigol’s UltraVision technology is similar to DPO?Hacking is, of course, a plus, but there is also a guarantee that immediately puts an end to hacking before the warranty period expires (you never know if the product will be defective or something like that).At work I use the Tektronix DPO4054B, but I can’t afford one for myself, so the question arose of choosing the optimal budget oscilloscope.

author: tautech
author_rank: Super Contributor
timestamp: August 20, 2024, 11:40:42 pm
content: Have a good look at SDS804X HD..........
Siglent SDL 1020X-E Bricked - Page 1
Forum section: electronics / testgear

author: ChazzD
author_rank: Newbie
timestamp: August 19, 2024, 12:06:40 pm
content: Hi thereNeed help to ressurect my dummyload. Had a bunch of 12V AGM batteries i needed to test the capasity on. But my Dummyload had issues startet to hang in voltage and not stopping on the desired voltage. when removing the leads. the voltage stayed the same. On whic ever voltage it freezed on.I desided to opgrade the firmware, as it was on the original firmware 1.1.1.19R1 to 1.1.1.21 Downloaded at Siglent.euI put the firmware on a 16GB kingston stik, and the unit freezen when i insertet the usb drive. After i rebootet the device it beeped on startup giving a fail on LOAD and Fail on ADC but firmware pass. Was not able to use the 16Gb stick so i tryed on a 3GB kingston stick formattet as per siglents recomendations.i was able to acces the stick and upgrade firmware, but it failed on second pass upgrading host, or something. don´t remember.Now when powering up, there is no picture on the screen, but light in the rj45 port and nothing else?Hope sincerely there is a fix to this problem.Kind RegardsKenni

author: tautech
author_rank: Super Contributor
timestamp: August 19, 2024, 08:46:52 pm
content: Quote from: ChazzD on August 19, 2024, 12:06:40 pmWelcome to the forum.1.21 is not the most recent firmware and Siglent.eu is a reseller, not EU headquarters.You can get all the FW updates here:https://www.siglenteu.com/service-and-support/firmware-software/dc-electronic-load/#sdl1000x-seriesQuoteContact Siglent EU HQ and request the SDL1000X recovery package:https://www.siglenteu.com/contact-us/

author: ChazzD
author_rank: Newbie
timestamp: August 20, 2024, 08:55:03 am
content: QuoteThank YouI Found out that later. The siglent.eu page is not updatet.QuoteI have now done that. Not shure what a recoverey package consists off. But looking forward to get i´t in working condition again.
Fluke 289 BT1 battery cell replacement part number or equivalent - Page 1
Forum section: electronics / testgear

author: guswin95
author_rank: Contributor
timestamp: August 17, 2024, 10:29:37 pm
content: Hello all,The super-cap issue on the Fluke 289/189 meters has been discussed enough in the site, with very helpful information. I was able to replace the super-cap in a few 189 and one 289 with replacements bought at Digi-Key.A late addition to the repair stack is a really nice 289 newer than most of the prior repairs, and to my surprise it has a small battery cell (BT1) that someone botched somehow and shows 0VDC. The battery was superglued to the PCB and a messy solder job was present.A Google search barely registers any mentions of these cells. For now, I removed it and am using the meter without any backup battery.A suggested replacement battery p/n: would be appreciated to restore the meter to factory condition.Thank you

author: Kean
author_rank: Unknown
timestamp: August 19, 2024, 05:59:06 pm
content: I'd guess it is a Seiko MS621FE-FL11E

author: guswin95
author_rank: Contributor
timestamp: August 19, 2024, 06:33:24 pm
content: HelloIt appears so. Excellent tip.Thanks
Logic Analyzer probe resistors? - Page 1
Forum section: electronics / testgear

author: manlymann
author_rank: Newbie
timestamp: August 18, 2024, 11:05:59 pm
content: I need to use a logic analyzer on RS232, modbus etc. Often the bus is more than 5.0VDC.Is there an inexpensive solution to this? Do I just put a resistor in series with my probe?

author: NE666
author_rank: Frequent Contributor
timestamp: August 19, 2024, 09:02:52 am
content: First, check the specifications for your particular LA. Many are "5v tolerant", whilst more expensive units often take much more e.g. my MSO 5000 is rated to 40v peak.If either your unit isn't rated for >5v, or you want to be cautious anyway and protect against any accidental overvoltage, then I suggest using a level-shifter board. They are designed for this, inexpensive and quite plentiful on well-known auction sites.https://www.pololu.com/product/2595

author: egonotto
author_rank: Super Contributor
timestamp: August 19, 2024, 09:14:22 am
content: Quote from: manlymann on August 18, 2024, 11:05:59 pmHello,why do you think you can be helped with so little information?Best regardsegonotto

author: artag
author_rank: Super Contributor
timestamp: August 19, 2024, 09:50:15 am
content: Because he didn't know they differed. If he'd known what NE666 has been able to tell him, he probably wouldn't have needed to ask at all. Learning is not just accumulating new facts, it's understanding what it is necessary to know.

author: Gyro
author_rank: Super Contributor
timestamp: August 19, 2024, 12:44:34 pm
content: You would be better to use a resistive divide rather than just relying on just a series resistor and the LA's input protection. Depending on the transition speed and LA input capacitance, the value of the resistors could probably be quite high to minimise circuit loading.

author: Kean
author_rank: Unknown
timestamp: August 19, 2024, 02:23:40 pm
content: Or maybe use proper logic level conversion for the inputs.There are common circuits and ICs for implementing the physical receiver layer of RS232 (DS1489, MAX3180) and Modbus (RS232,RS485,Ethernet) that provide 3.3V or 5V logic outputs.

author: janoc
author_rank: Super Contributor
timestamp: August 19, 2024, 04:36:38 pm
content: Quote from: artag on August 19, 2024, 09:50:15 amBut the first step to learning something is to ask questions that can be actually answered.One doesn't need to be an expert to realize that maybe providing information about which logic analyzer is concerned and what kind of probe one talks about is rather essential information. Saying "my probe" is really not sufficient. People don't read minds.See also:http://www.catb.org/~esr/faqs/smart-questions.html

author: DaJMasta
author_rank: Super Contributor
timestamp: August 19, 2024, 05:41:47 pm
content: Use a scope that can decode it? If you're not talking about many channels in parallel, just use a scope's analog input channels (with comprehensive protection and probes) and tell the scope to decode digital from those channels.
SDS2000X HD / SDS3000X HD Hack - Page 1
Forum section: electronics / testgear

author: veegee
author_rank: Newbie
timestamp: August 19, 2024, 02:30:49 pm
content: Hi all, has anyone hacked the SDS 2000X HD / 3000X HD? If it's not available publicly, can anyone at least confirm that it has been done? I don't mind reverse engineering it myself.Are there any firmware dumps available? Or any information on the firmware encryption/file format to get me started and save some time?I'm pretty decent with reverse engineering. If I can figure it out and know that it can't be easily patched, I'll post instructions for other people.

author: zrq
author_rank: Frequent Contributor
timestamp: August 19, 2024, 09:31:39 pm
content: Not a siglent user but I noticed this:https://www.eevblog.com/forum/testgear/siglent-ads-firmware-toolkit/msg5553975/#msg5553975The author decided to remove the file for whatever reason but it seems likely someone can decrypt and patch the ADS files for the new siglent scopes.

author: Martin72
author_rank: Super Contributor
timestamp: August 19, 2024, 10:10:44 pm
content: Quote from: veegee on August 19, 2024, 02:30:49 pmDo you have an SDS2000 or 3000X HD?Otherwise, you don't even need to think about it.There are neither instructions nor a script for this.You can read that it works if you make the effort, which you obviously haven't done, otherwise you would also know that I also opened a thread about it back then.It “died” because there was and is nothing to report.QuoteIf you manage to do this, however, without scope, then rejoice in silence.There are various reasons why there is no how to to read here, the most important is that you don't want to encourage the manufacturer to build in an even bigger hurdle for “unlocking”.This variant, which applies to the SDS2000X HD and higher, should be seen as a red line.Because the next one could make it impossible and nobody wants that.And no, I don't know how to do it, I'm not an expert.I just know that it works and that's enough for me, that's all I need to know.

author: veegee
author_rank: Newbie
timestamp: August 20, 2024, 11:30:53 am
content: That's all I needed to know, thank you
Have their been any reviews of the various LCR-TC# series? - Page 1
Forum section: electronics / testgear

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: August 16, 2024, 02:17:35 am
content: Hello,I own an LCR-TC1 and over the years I've noticed that they* have come out with newer versions (E.G.https://www.ebay.com/itm/387166636647). I've looked on YT, and searched these forums, but I cannot seem to find a review^ of the various modes.Have their been any reviews of the various models in the LCR-TC# series?Thanks* I haven't the faintest who "they" are.^ Review meaning someone actually talks about more than their own personal opinions of the product and shows a few components being tested. Like head-to-head against one or more of the other LCR-TC# models, or a comparison to quality instruments.: Fixed grammar.

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: August 18, 2024, 10:40:57 pm
content: Replying in hopes that someone who knows where to find a review will see this post.
HP54501a (Boschert MC1368a) - Page 1
Forum section: electronics / testgear

author: AndreH
author_rank: Newbie
timestamp: August 06, 2024, 12:16:37 pm
content: Hi all. I have the hand drawn sketch of the Boshert MC1368a PSU used in a number of HP test gear. Does anyone know the value of R40 (the variable resistor that adjusts the 5.14V supply line) . Many thanks

author: wn1fju
author_rank: Frequent Contributor
timestamp: August 19, 2024, 12:09:04 pm
content: See picture.Pin 1 of line filter goes to Pin 1 of power supply plugPin 2 of line filter goes to Pin 4 of power supply plugPin 3 of line filter goes to Pin 3 of power supply plugPin 4 of line filter goes to Pin 2 of power supply plugGround pin of line filter goes to Pin 6 of power supply plug (and to chassis ground)Pin 5 of power supply plug is unused.Power supply plug as viewed from top of scope (pin 1 is towards to rear of scope).
Can you use an electronic load when doing smps node plots? - Page 1
Forum section: electronics / testgear

author: georgeharker
author_rank: Newbie
timestamp: May 29, 2024, 12:50:08 am
content: I’m testing stability and optimizing a buck step down power supply. To do so I’m doing some bode tests, but I have to put the system under load. I have a siglent sdl1024x-e but I’m finding that plot points below about 1kHZ are all over the place phase wise. My signal injection transformer is flat enough from about 28Hz to 5kHz. I’m using a 20A Texas Instruments buck converter which frankly seems stable outside the test setup and has about 30mV peak to peak ripple max. However when I run bode tests I get noisy results below 1k ish. I have tried using varisweep to up the signal in that range but to no avail. I’m now wondering if using an electronic load is an issue - I was in constant current mode at about 5A. I’ve also tried constant resistance.Scratching my head a bit. I believe I can get the 0dB crossing and at that end it’s clean enough. But I’d love a clean graph to help me believe I’m not missing something major at lower frequencies.

author: Smokey
author_rank: Super Contributor
timestamp: May 29, 2024, 03:24:30 am
content: maybe put the load in constant resistance mode?

author: Berni
author_rank: Super Contributor
timestamp: May 29, 2024, 05:23:58 am
content: This is a common problem with electronic loads. They have regulation loops internally to constantly monitor and adjust the load to match what you set it for.For doing any sort of stability analysis on power supplies it is best to use simple power resistors as loads. You can build yourself a chain of 1 Ohm power resistors that you can tap off at various points to get various kinds of load.Then to do stability testing get a MOSFET and drive it using a signal generator. Use this power transistor to switch in a extra resistor as load, letting you get a step response of your power supply under test. If you want to see it as a freqency plot, that step response can be run trough differentiation then FFT.

author: georgeharker
author_rank: Newbie
timestamp: May 29, 2024, 05:46:51 pm
content: I suspected as much.I might grab some power resistors to act as a secondary load - I don’t have any and I need to pull 10 A so big standard ones won’t do.It looks like a combo of updating the scope firmware, doing a self calibration, setting the load to constant resistance and using only hold gain after careful setting has much more sensible graphs coming out. I’d course the 0db crossing is pretty much the same but I’m now much more confident that there’s not something nasty lurking in the low frequency regions.ThanksGeorge

author: Smokey
author_rank: Super Contributor
timestamp: August 19, 2024, 05:01:38 am
content: Quote from: Smokey on May 29, 2024, 03:24:30 amfunny. I spent part of the day trying to figure out why the high side switch board I'm designing was going into current limit mode even through I had my electronic load set to constant current way lower than the current limit threshold of the switch...The solution.... constant resistance mode on the load...
Looking for Wavetek/Fluke WaveWiz software - Page 1
Forum section: electronics / testgear

author: Kosmic
author_rank: Super Contributor
timestamp: November 23, 2023, 04:15:48 pm
content: Hello,I'm looking for an old windows software made by Wavetek (acquired by Fluke) calledWaveWiz. It was used to interface with their waveform generators.If anyone has a copy, it would be greatly appreciated!Thanks

author: Kosmic
author_rank: Super Contributor
timestamp: November 26, 2023, 04:00:27 pm
content: BumpNobody ?

author: Odd-Job
author_rank: Unknown
timestamp: August 19, 2024, 12:30:32 am
content: G'day Kosmic,I know, bit old/late but you could lokk at this SW from OWON for their Arb Wform.https://files.owon.com.cn/software/PC/DS_Wave_Waveform_Editor_Setup.zip
hp 16522a not recognized by logic analyzer main frame - Page 1
Forum section: electronics / testgear

author: retrev
author_rank: Contributor
timestamp: August 05, 2024, 07:50:27 pm
content: I've got a 160500B logic analyzer and bought a 16522a pattern generator module. Some googling shows they should be compatible but when I put it in the frame it says unrecognized board. It's supposedly tested good by an ebay seller which some longevity and good reviews so my first thought isn't a bad board. Any ideas what might be going on?

author: artag
author_rank: Super Contributor
timestamp: August 05, 2024, 08:08:57 pm
content: Is the 16522 driver in the system directory of the 16500 boot disc ?I know it needs to be there but I'm not sure of the results when not present. However, I think it will be unrecognised.Do you have any other, working, boards present?I bought a 16500C with 3 16552 cards so I'm pretty sure it's supported.

author: retrev
author_rank: Contributor
timestamp: August 05, 2024, 08:14:12 pm
content: I have a working capture card and the documentation definitely says it's supported. I hadn't thought of a driver, didn't know it was required. What's the filename for the driver? If it's not there I'll have to find a way to transfer it over...guess I'm digging out old hardware with a floppy drive.

author: artag
author_rank: Super Contributor
timestamp: August 05, 2024, 08:36:50 pm
content: I don't have mine to hand, but I think it will be SYS_025.The pagehttps://www.alexandrugroza.ro/microelectronics/essays-research/hp-16500c/index.htmlindicates that PV_025 would be the performance verification for the 16522 and SYS_025 would be the matching runtime software.You can find it inhttps://www.keysight.com/gb/en/lib/software-detail/instrument-firmware-software/16500c-operating-system-version-109-sw509.htmlIt's only necessary to have the system and drivers for the cards you have, and on the floppy-based 16500A you would build a floppy with the necessary parts. On a B or C you have a hard disc and there's no reason not to load everything, but that may not have been done on yours. Or perhaps it has older system software, set up for the earlier 16521 pattern generator.I think there's a way to list the cards by their ID code (eg _025) - possibly running the test system.

author: retrev
author_rank: Contributor
timestamp: August 18, 2024, 12:27:31 am
content: The missing driver was the problem. Finally had time to find my USB floppy drive and some floppies and transferred all the system disks. Everything is working great now.
Fluke Connect Data - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: August 22, 2024, 10:12:54 am
content: When I record an instrument with Fluke Connect it makes a graph which is on the phone but also stored online. How do I get the data from the graph? I want to edit the data to throw away data point I don't want.
HP 3211A Sweep Oscillator - looking for PDF manual please - Page 1
Forum section: electronics / testgear

author: Technical Ted
author_rank: Contributor
timestamp: August 18, 2024, 10:31:36 am
content: I picked up the subject unit at a ham fest. I've searched on-line but can not find a free PDF service or operator's manual to download. Can anyone help me out please?Thanks!Ted

author: factory
author_rank: Super Contributor
timestamp: August 18, 2024, 12:28:42 pm
content: Seems quite an uncommon one, doubt there is a free manual anywhere.David
Pomona 1269 Adapter failures - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: August 17, 2024, 04:11:00 pm
content: We ordered 3 Pomona 1269 BNC to Dual Banana adapters from Mouser last Sept.Been having all sorts of interconnection issues on and off for some time, thinking cheap connectors, cheap adapters, cheap cables and so on. Only to find 2 of these damn Ponoma adapters are the source of the problemsWe've never had a Pomona adapter, connector, or cable fail, so never suspected this as the source of the problem!!The center BNC pin to Banana plug is intermittent if you wiggle the Banana plug, so sometimes it's makes contact when inserted into a meter, other times notAnyone else have any issues with the Pomona 1269 Adapters? Suspect this is a once off manufacturing defect as Ponoma is highly respected and one reason we select their products, so as not to have these kinds of issuesBest,