hybridfree/eevblog-posts huggingface dataset:
HP/Agilent 8546 AUX / ALC pinout - Page 1
Forum section: electronics / testgear

author: ToHu
author_rank: Newbie
timestamp: March 29, 2025, 02:38:39 pm
content: Is anyone have the HP 8546 receiver AUX and ALC cables pinout ? There is this toppichttps://www.eevblog.com/forum/repair/hp-8546a-spectrum-analyzer-aux-cable-pin-out/msg2955482/#msg2955482with pinout but it's not clear is this on both side or this only on the receiver side. Also i can't find anything related to the ALC pinout.

author: ToHu
author_rank: Newbie
timestamp: March 31, 2025, 04:21:51 am
content: The AUX cable is straight 1-1, 2-2 ... 9-9 The ALC use only two pins on the receiver side, pin 1 and 2. On the preselector side pin 2 is ground, i suppouse this is also a straight cable. Millwest PSG.0B.303.CLAD52 is a good LEMO alternative.
What HPAK gear had the highest revision letter??........  - Page 1
Forum section: electronics / testgear

author: Smokey
author_rank: Super Contributor
timestamp: January 18, 2024, 03:21:09 am
content: I've seen lots of "B"s (6632A/B)...Some "C"s (8510A/B/C)...and a few "D"s (8648A/B/C/D)...What piece of HP/Agilent/Keysight gear had the highest revision letter? Bonus points if it's still in production.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: January 18, 2024, 03:30:11 am
content: Mine appears to be a 415E.

author: tautech
author_rank: Super Contributor
timestamp: January 18, 2024, 03:33:11 am
content: G and T variants are discussed here:https://www.eevblog.com/forum/testgear/12-bit-keysight-when/

author: Someone
author_rank: Super Contributor
timestamp: January 18, 2024, 04:08:32 am
content: It is not always a strict revision increment as tautech points to.Take the Command Expert supported instruments list which includes oddities such as:E4980ALUXR0051APRP7952ATDSO9204HDSOX93004LDSOX92004Q

author: gslick
author_rank: Frequent Contributor
timestamp: January 18, 2024, 04:20:11 am
content: 1670A / 1670D / 1670E / 1670G Logic Analyzers

author: Greybeard
author_rank: Frequent Contributor
timestamp: January 18, 2024, 08:13:30 am
content: Quote from: tautech on January 18, 2024, 03:33:11 amI think "T" is not revision letter, it is for "touch screen", isn't it?

author: factory
author_rank: Super Contributor
timestamp: January 18, 2024, 10:20:17 pm
content: The letters are not a revision, they are for different specced versions of the same model, or major redesign of a product. The serial number prefix is normally used for design revisions.David

author: MadTux
author_rank: Frequent Contributor
timestamp: January 18, 2024, 11:42:21 pm
content: Mostly stuff that was in production for very long time and got upgrade due to old parts unavailable or because new technology was better.HP8566/8568 and 3585A/B switch from 9825 to 68kHP16500A/B/C from old 68k to 68020/68040 or something.Or photochopper to discrete chopper amp in HP3400A/B.Think HP8753 got most upgrades that way...

author: KE5FX
author_rank: Super Contributor
timestamp: January 19, 2024, 04:56:13 am
content: There was an 8554L plugin for these, too.But as far as actual revision suffixes go, I can't think of anything later than the 'G' suffix used for the 16xx/16xxx series logic analyzers.

author: Smokey
author_rank: Super Contributor
timestamp: March 30, 2025, 08:56:28 pm
content: 5245Lhttps://www.kennethkuhn.com/hpmuseum/scans/hp5245l.pdf
NGI N9000 / N83580 Battery Cell Simulators - Page 1
Forum section: electronics / testgear

author: stefanstefan
author_rank: Newbie
timestamp: March 30, 2025, 08:39:08 pm
content: I am curious if someone has experience with NGI N9000 / N83580 Battery Cell Simulators?N83580:https://en.ngitech.cn/product/show/3844.htmlN9000:https://en.ngitech.cn/product/show/4976.htmlI am thinking about this or something similar to use for development and testing of a PCB with a BMS (battery management chip) on it for a multi-cell lithium battery.
EEVblog store coupon - Page 1
Forum section: electronics / testgear

author: kiltro
author_rank: Contributor
timestamp: March 28, 2025, 08:40:14 am
content: Hello everyone!Is there any active coupon code for the EEVblog store?

author: Kean
author_rank: Unknown
timestamp: March 30, 2025, 07:44:42 am
content: Nohttps://www.eevblog.com/forum/testgear/eevblog-store-454947/msg5838383/#msg5838383
Upgrading Siglent Operating System - Page 1
Forum section: electronics / testgear

author: u666sa
author_rank: Frequent Contributor
timestamp: March 30, 2025, 01:12:44 am
content: I went looking for USB driver for the scope (I did find post about NI-VISA) and basically I come across operating system for my scope. I did update firmware previously.What version of operating system do I have?How to update it?I created a FAT32 disk, dropped the files onto it, inserted the disk into front USB while the scope was off and turned the scope on. The scope came up. Other than that nothing I think happened.https://siglentna.com/service-and-support/firmware-software/digital-oscilloscopes/

author: tautech
author_rank: Super Contributor
timestamp: March 30, 2025, 02:38:26 am
content: Quote from: u666sa on March 30, 2025, 01:12:44 amYep, just as a OS update should be, invisible apart from the 8.3 now shown in Sys Info.You're all good now, enjoy the new features added in V3.
UNI-T UTG962E sig gen. Rasping noise at switch on - Page 1
Forum section: electronics / testgear

author: 807
author_rank: Frequent Contributor
timestamp: January 29, 2023, 04:17:58 pm
content: Sig gen noise.mp3(126.73 kB - downloaded 98 times.)Does anyone else get a rasping noise when switching on their UTG962E? It doesn't do it every time, but around 50% of the time it does. I haven't opened it up, so don't know if it's coming from the piezo buzzer or the relays.I've attached an audio file.Sometimes it goes on for longer & sometimes just a few clicks.

author: BillyO
author_rank: Super Contributor
timestamp: January 29, 2023, 05:34:05 pm
content: Yikes!That sound is not supposed to come from any sort of electronic device.I would open it up just to see where the noise is coming from. Don't worry about your warranty. Since it's a UNI-T you don't really have a warranty.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 29, 2023, 05:54:38 pm
content: someking of hissing noise ?? psu section, anything like switching frequency at startup ??

author: 807
author_rank: Frequent Contributor
timestamp: January 30, 2023, 10:05:30 pm
content: Quote from: BillyO on January 29, 2023, 05:34:05 pmyep. I will open it & try & find where the noise is coming from. Although I'm not sure if I will still be able to fault find it, as the most it goes on for is around 2 seconds. And it doesn't do it every time.I was just wondering if anyone else has the same problem. I've seen a few reviews & no one else has mentioned it.

author: 807
author_rank: Frequent Contributor
timestamp: January 30, 2023, 10:12:27 pm
content: Quote from: coromonadalix on January 29, 2023, 05:54:38 pmIt's not a hissing noise, it's a rasping'farting kind of sound that gradually decreases in frequency.The sig gen uses a seperate power supply that has a USB socket. The cable supplied is a USB to barrel lead.I suppose it could be the PSU. I could try a different power supply for a few days to see how it goes.

author: tpolecat
author_rank: Newbie
timestamp: March 29, 2025, 01:37:37 am
content: Hi, just to add to this thread in case anyone else runs into the problem. I spoke to UNI-T and this instrument needs a full 2A or even a bit more (mine needs 2.2) to start up. If voltage droops during startup the relays can oscillate (hence the buzzing).- rob

author: 807
author_rank: Frequent Contributor
timestamp: March 29, 2025, 05:42:28 pm
content: Quote from: tpolecat on March 29, 2025, 01:37:37 amYep.I thought I had replied to this thread ages ago, but obviously not.In my case, I had added an extension cable to the power supply. It seems like the resistance of the extra length of cable was enough to drop the voltage and reduce the current, causing the relays to chatter.
121GW Bail Hole Mystery - Page 1
Forum section: electronics / testgear

author: mspencer
author_rank: Unknown
timestamp: March 29, 2025, 02:13:15 pm
content: I'm attempting to solve the mystery of the 121GW bail hole. (Stop snickering, in the back.)I just received my 121GW, upgrading from, well, Radio Shack cat. no. 22-813. I also picked up an off-brand magnetic hanger for a Klein Tools meter, which comments suggested would be compatible. I have no need for a magnetic hanger, as I will never be doing HVAC work. But the strap works and I'm happy.The hole has pretty tight tolerances: a circle with inner diameter 26.5 mm, over a rectangle of 16 mm x 30 mm. This meter was made by the same people who make UEI meters, right? UEI sells the AMH1 magnetic hanger and lists it as compatible with their DM505, 515, and 525 meters. Youtube reviews of the 505 and 525 suggest the DM505 has what looks like the exact same bail design with the exact same hole. The DM525 seems to have just a round hole, no rectangle.The fact that there's a bit of a cavity behind the bail, and a hole chosen with some deliberate design, makes me think some use case was imagined where you store the magnet part of the magnetic hanger behind the bail. Or it's not designed for the magnet at all. And for all we know, nobody remains at UEI / Kane who remembers why this was designed this way, what use case was imagined.So all we can do is guess, right? I'm incredibly green, completely new to the hobby, so anyone else on this forum will have better guesses than mine. Apart from holding a smartly-designed 3D-printed anti-tip stand -- good job on that -- what do we think the original designers likely intended?
Rigol Ultra Sigma (or equivalent interface) on Apple Silicon (or Windows Arm64) - Page 1
Forum section: electronics / testgear

author: s1m0n3t
author_rank: Newbie
timestamp: March 28, 2025, 05:42:27 pm
content: Hi everyone, I'm looking for somebody that already tried to interface Rigol tools with a Macbook based on Apple Silicon (M1).Ok, small aside: I decided a few years ago to buy a Macbook with M1, for several reasons, including the great performances vs price, compared to Intel processors. Of course I didn't consider some compatibility issue and we are not here to discuss if it's a good idea using a Macbook with M1 processor for an electronics engineer...I was used to virtualize on Windows with VMware some software not available on MacOS and I'm still doing that, even if for software not compatible with Arm64, Windows needs to emulate the execution as x64, or something like this.Here is the problem: I would like to interface to the tools in my lab, using my macbook, most of them from Rigol:RSA3015N - Spectrum AnalyzerDHO804 - OscilloscopeDG822 Pro - Function generatorDM858 - MultimeterFor the scope and other tools there is also a nice web interface available and I can use different ways to just download measurement data, so it's not a priority to interface them properly. But for the spectrum analyzer it's the only way to perform precompliance tests, for example.Of course there is nothing available for MacOS, I didn't expect that at all. But when I tried to install Rigol Ultra Sigma on Windows 11 Arm64, the virtual machine just crashed and Windows is not able to start anymore. I managed to fix the Windows startup again, but Ultra Sigma just don't work.Anyone tried something similar?Also third party or open source tools will be great. I found for example Sigrok, but I cannot find any recent Rigol tool in the supported hardware list and especially no spectrum analyzer yet.Thank you in advance for your support!
Agilent 4268A test head A43 - Page 1
Forum section: electronics / testgear

author: systemCorrµPti0n
author_rank: Newbie
timestamp: March 28, 2025, 10:07:54 am
content: Hi!So I've come across an Agilent 4286A without its test head. The instrument seems to be functional but I cant do many in depth tests without the test head :/There are no schematics of it, just block drawings. I'd like to build one myself but I don't know enough about it to go fully on my ownWhat I've found so far are this instructions and diagrams in different manuals of the 4268A:Through Pages 160-166 and 222-224 from the service manualI'd also like to ask if possible: If anyone happens to have this test head would you be willing to open it and take a few photos to make it easier to reverse engineer and build?Thanks for reading and best regards
Mechanic RP15 multimeter probes (0.06 ohms) - Page 1
Forum section: electronics / testgear

author: u666sa
author_rank: Frequent Contributor
timestamp: March 28, 2025, 09:27:09 am
content: The other probes, the Mijing BX-11 suck by comparison. These probes are really nice, quality. Nice soft to the touch silicon. Nice golden removable points. Nice 0.06 ohm resistance. Nice price, I got mine for $5.77 tax and shipping included.Highly recommend these.https://www.aliexpress.us/item/3256807203472511.html
Agilent 54831M Boot Up Procedure - Page 1
Forum section: electronics / testgear

author: ZGoode
author_rank: Frequent Contributor
timestamp: March 28, 2025, 12:27:01 am
content: Hi all,I'm in the process of restoring one of my 548xxx series scopes and it is taking forever to boot. It is a 54831M. My 54832B is relatively fast, especially in comparison. Is it normal for the M series to take forever to boot after reaching the Infinium splash screen? I am aware that the M (military) model has a much weaker CPU for some weird reason, but it still feels way slower than it should. I tried the official Agilent WIN98 recovery disk, and it is doing the same thing as before. Any idea where to go from here?
LeCroy 6050A 500Mhz scope hacking - Page 1
Forum section: electronics / testgear

author: Miles_Dawkins
author_rank: Newbie
timestamp: December 21, 2024, 06:51:24 am
content: LeCroy 6050A bandwidth expansionsHey everyone.I recently got a great deal on a 6050A 4chan el 5GS/s 500MHz scope and was looking into expanding the scope's bandwidth and sampling for 1GHz operation. The 1Ghz version of this series (6100a) also has 4 5GS/s channels, but it interweaves 2 channel samples to expand it to 10GS/s. Taking a look at the service manual, it appears that the front end is identical with only a few capacitor and resistor differences. Based on this I believe this may be feasible, however, the only information I can find on the configuration is a small EEPROM that appears to tell the FPGAs what scope it's a part of. There are some SPI breakouts for it so I could look and see if changing the info on that EEPROM would convert it but I'm not totally sure (maybe there is a software flag that will enable the 6100A features). If anyone has experience with this type of hacking I'd love some feedback and help with this project.

author: ollopa
author_rank: Regular Contributor
timestamp: March 27, 2025, 05:26:45 pm
content: Sorry to disappoint you but those RC filters in the input section have to be changed in order to achieve higher BW on the WR6KA scopes. The scope firmware determines the base model (WaveRunner 6000 series) based on the kernel driver used for the PCI acquisition interface card and sometimes by additionally probing hardware, such as the JTAG chain. The bandwidth portion, whether you are a 6030, 6050, 6100, 6200 is then determined by the installed software options. If I recall correctly, the base model is a 6050, there is a RSR reduced sampling rate option for the 6030, and then MBW and HBW (medium BW and high BW) options for 6100 and 6200.On the later series of scopes the bandwidth option is entirely a bit-flip, but on the WR6K series there are RC bandwidth filters so even if you install a higher BW option it won't change the actual bandwidth that the front end can pass through to the ADCs.
Probes available for the Siglent SDM3055? - Page 1
Forum section: electronics / testgear

author: bsg
author_rank: Newbie
timestamp: March 25, 2025, 03:22:26 pm
content: Greetings everyone.I am about to buy this bench DMM, I'm pretty satisfied with its reviews; however, one of the main features I've been looking for was 4-wire measurement. As far as I can tell, the meter doesn't come supplied with kelvin probes, and I cannot find any on Siglent's websites either.From other brands, I commonly find BNC-terminated probes (useless for the 3055, unless I chop and re-terminate them), or something like these GW Instekshttps://eleshop.eu/gw-instek-gtl-108a-kelvin-test-leads.html. Maybe buy a pair of these:https://www.tme.eu/pt/en/details/kml7488-100/single-test-leads/schutzinger/kml-7488-pz-0-75-100/?Any suggestions? Did I read the 3055's 4-wire measurement capabilities incorrectly -- or they're mis-branded, though the meter has the button and markings for them -- or what gives?Thanks

author: KungFuJosh
author_rank: Super Contributor
timestamp: March 25, 2025, 03:33:35 pm
content: It's a solid meter. I've never seen a bench DMM that comes with 4 wire kelvin probes. You can certainly buy kelvin probes for it though. You could get something like the Hioki L2101 or L2107.

author: egonotto
author_rank: Super Contributor
timestamp: March 25, 2025, 03:49:00 pm
content: Hello,if you do not need to measure small resistances very often, I would not buy Kelvin probes, but two cables (red and black) with crocodile clips.You can then use these to supply the current and tap the falling voltage with the probes supplied.But I wonder about the following. How does an analog 20 MHz oscilloscope and a 1 MHz generator fit together with a 5 1/2 digit multimeter?Best regardsegonotto

author: bdunham7
author_rank: Super Contributor
timestamp: March 25, 2025, 03:56:43 pm
content: Any kelvin clamp sets with 4 banana plugs will likely work fine. The GW Instek ones will be good but these probably will be too:'https://www.aliexpress.us/item/3256807955881394.html

author: mawyatt
author_rank: Super Contributor
timestamp: March 25, 2025, 04:15:23 pm
content: Those ^^^^ look good!!If you have a Yaorea or Fnirsi Battery Internal Resistance Tester or Milli-ohm Meter, the Kelvin Clips supplied can be used with a DMM with the adapters shown here:https://www.eevblog.com/forum/testgear/any-more-in-depth-info-on-the-yr1035-battery-tester-milliohm-meter/msg5801467/#msg5801467The Kelvin Clips that came with the HRM-10 are nice, better than the Clips we have from AliX.Best

author: bsg
author_rank: Newbie
timestamp: March 26, 2025, 07:05:53 pm
content: Quote from: egonotto on March 25, 2025, 03:49:00 pm"Bench stuff."In all seriousness, I *am* building my bench, and those 2 are starter units, as it were; since my DMM right now is a very feeble handheld one, I'm skipping a step and getting something more capable. Eventually I'll get a proper scope (which shall sit next to the old one, they'll be friends) with built-in a logic analyser and a function generator. Like I said in the other post, I like "knobby" gear.
LG - EZ Digital (was "OEM of these DSO's ?") - Page 1
Forum section: electronics / testgear

author: shakalnokturn
author_rank: Super Contributor
timestamp: October 21, 2022, 09:29:52 am
content: I'm trying to figure out who designed these, to me they look very GW Instek but can't seem to find a model with the exact same front panel layout.Also could any owners of these or OEM model give me the approximate boot time?

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 31, 2024, 06:27:26 am
content: Answering myself as it often occurs....They're not GW Instek, made by LG / Gold star / EZ Digital.Any owners of these or similar looking models who would care to do a firmware dump ?The ROM / Flash should be socketed so easy enough.

author: shakalnokturn
author_rank: Super Contributor
timestamp: April 10, 2024, 09:44:57 pm
content: Once more...Sharing my copy of firmware 2.2 for DS-1150 / Française d'instrumentation FI 3215.I'd be grateful if anyone with a higher revision (multilingual) would go to the bother of dumping theirs. I expect not. (Expect nothing, you won't be deceived.)

author: limpidity
author_rank: Newbie
timestamp: March 11, 2025, 09:02:52 am
content: Hello.I'm here to repair my oscilloscope DS-1150.It works well after repairs.The problem is that when you turn it on for the first time, it takes time because you have to force a test.Do you have the latest firmware and software to connect to your PC.

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 11, 2025, 10:10:43 am
content: Hello limpidity,I no longer have this oscilloscope, oscilloscopes come and go, I can't keep them all.I have nothing more than what has already been posted here.I think this is the situation you get when the battery is dead, calibration is lost from NVRAM so the scope self test forces a 2-5 minute calibration to be usable.

author: gasensio
author_rank: Newbie
timestamp: March 21, 2025, 01:20:12 am
content: Hello, I recently purchased a DS1150 and am interested in the technical documentation and SoftView software, but I haven't been able to locate it.I want to replace the NVRAM battery. I know it's the Tekcell SB-AA02 3.6V Non-rechargeable battery.I've removed the four rear screws, but the cover won't come off. Is there anything else I need to remove?I'm still looking for information on this device.Regards

author: gasensio
author_rank: Newbie
timestamp: March 27, 2025, 04:34:59 pm
content: My DS-1150 has EPROM with firmware version 3.09.Battery replaced. 👍Regards
Yokogawa Digitalmeter DM7560 - Page 1
Forum section: electronics / testgear

author: Takasaka Chikuho
author_rank: Newbie
timestamp: March 25, 2025, 05:09:18 pm
content: I watching for yokogawa dm7560 digitalmeter, and nobody take a video for this, also I not any thread in EEVblog forum. Anyone tried it? hope someone can share the experience.

author: coromonadalix
author_rank: Super Contributor
timestamp: March 25, 2025, 05:17:11 pm
content: well buy it and do an reviewjokesnope never saw them ...

author: Muttley Snickers
author_rank: Unknown
timestamp: March 25, 2025, 07:00:23 pm
content: It's certainly a good looking bench meter, I would probably buy it on looks alone.The full manual is over 10 MB so too large to post, a data sheet and image below to save others the trouble searching.

author: thm_w
author_rank: Super Contributor
timestamp: March 25, 2025, 09:16:30 pm
content: Looks great but don't think its worth it over dmm6500:3A max current. No mention of thermocouple, capacitance, or other measurements.Site:https://tmi.yokogawa.com/ca/solutions/products/generators-sources/digital-multimeters/dm7560-digital-multimeter-65-digit/Brochure:https://cdn.tmi.yokogawa.com/1/2667/files/BUDM7560-01EN.pdf$2,200:https://www.newark.com/yokogawa/dm7560-8-d-c2/dmm-lan-rs232-3a-6-5degit/dp/91AH5619

author: zepto
author_rank: Regular Contributor
timestamp: March 26, 2025, 02:36:43 am
content: I have the rebadged Iwatsu variant. It's a really nice multimeter.It's silent, boots in ~5s, and has a fantastic user interface. I don't think they were very popular as I rarely see them for sale used.https://www.eevblog.com/forum/testgear/iwatsu-voac-7602/https://www.eevblog.com/forum/testgear/iwatsu-voac-7602-bench-dmm/

author: Takasaka Chikuho
author_rank: Newbie
timestamp: March 26, 2025, 04:31:33 am
content: Quote from: thm_w on March 25, 2025, 09:16:30 pm"TEMP" function on it, these support thermalcouple model:Pt100 up to 850cJPt100 up to 510cAnd yes it can't meas capacitance.

author: AVGresponding
author_rank: Super Contributor
timestamp: March 26, 2025, 06:04:50 am
content: If you're using instruments of that level, you should probably be using a dedicated LCR meter anyway

author: coromonadalix
author_rank: Super Contributor
timestamp: March 26, 2025, 11:11:17 am
content: Quote from: AVGresponding on March 26, 2025, 06:04:50 amyep same thoughts use dedicated lcr ...

author: BeBuLamar
author_rank: Super Contributor
timestamp: March 26, 2025, 04:11:54 pm
content: Nice meter. For the price I hope it's made in Japan. With that many digits I doubt that they can make a capacitance measurement that justifies that many digits.

author: thm_w
author_rank: Super Contributor
timestamp: March 26, 2025, 10:02:31 pm
content: Quote from: AVGresponding on March 26, 2025, 06:04:50 amNot the point.DMM6500 has: capacitance, 10A range, LAN standard, for the same or lower price.

author: Martin72
author_rank: Super Contributor
timestamp: March 26, 2025, 10:08:14 pm
content: If normal DMMs have a capacitance function, it is only for classic RC with DC voltage.You can have that with you, but usually you want to know “more” and then a dedicated LCR meter is needed.
HP 16034 LCR SMD Test Fixture eBay clones - Page 1
Forum section: electronics / testgear

author: benj38
author_rank: Frequent Contributor
timestamp: March 25, 2025, 07:26:29 pm
content: I was wondering if anybody has any experience with the clones of the HP 16034x LCR SMD test fixture.For example:https://www.ebay.com/itm/316436967944The cost of an original fixture from Keysight, even used on eBay, is quite impressive, and truly hard to justify for an occasional hobby use.

author: mawyatt
author_rank: Super Contributor
timestamp: March 25, 2025, 08:31:01 pm
content: Yes, here's a couple.https://www.eevblog.com/forum/projects/lcr-smd-fixture-modification/https://www.eevblog.com/forum/projects/different-type-lcr-smd-fixture/msg5061028/#msg5061028This one from AliX "appears" to be the better build quality. Note the 4 BNC Levers and top cover side mounting bolts. We have both from long ago and have shown some details in the above links.https://www.aliexpress.us/item/3256808516332326.html?spm=a2g0o.productlist.main.5.7a24lwQ9lwQ9C4&algo_pvid=d98eae80-8062-48f7-a376-70f0c9dbd1b9&algo_exp_id=d98eae80-8062-48f7-a376-70f0c9dbd1b9-4&pdp_ext_f=%7B%22order%22%3A%22-1%22%2C%22eval%22%3A%221%22%7D&pdp_npi=4%40dis%21USD%2176.05%2176.05%21%21%21549.88%21549.88%21%402103247017429372941266549e45e6%2112000046310916409%21sea%21US%212016305281%21X&curPageLogUid=ynBLjUzLxQTN&utparam-url=scene%3Asearch%7Cquery_from%3AAlso note, we modified one to allow External DC Bias for the SMD DUT.Agree those HP Adapters are expensive, so are the similar ones from Tonghui or Hioki. Same for the old Tek 177 Standoff Fixtures for the Tek 577 Curve Tracer. Why we decided the DIY route for the Tek Adapters and modded cheap clones for the HP Adapter.Best

author: Conrad Hoffman
author_rank: Super Contributor
timestamp: March 26, 2025, 04:18:18 pm
content: We have the $2300 HP fixture at work and from the pictures on eBay I can't believe the performance would be much different with the $73 unit. What you'd really like to see is a view with the cover removed to see how they shielded the two sides.

author: mawyatt
author_rank: Super Contributor
timestamp: March 26, 2025, 05:43:46 pm
content: We've had good results with the clone fixtures (after modifying) with higher Z components. For low Z work consider something like mentioned above.The clone fixtures bring the Force and Sense (Hcur, Lcur and Hpot, Lpot) leads thru the BNCs and tied together at the bottom of the Plungers with thin threaded brass bolts. So the 4 wire Kelvin connection ends there and the plunger and tip are not Kelvin sensed. There is also considerable variation in SMD contact resistance which creates more uncertainty even when a Zero Calibration is performed. These clone fixtures work OK for higher Z components, but not as good with low Z as we've found, and why we developed the custom LCR Fixtures mentioned.Best
Siglent SDS1104X-E - Signal level varies with sampling rate? - Page 1
Forum section: electronics / testgear

author: jamfletch
author_rank: Contributor
timestamp: March 24, 2025, 11:42:11 am
content: Hi,I've been playing around with my Siglent scope trying to measure a 400MHz CW signal - I've noticed that if I increase the timebase - causing the sample rate to decrease - I can see the envelope of the CW signal, and the reported pk-pk voltage I see is approximately correct. But if I try and decrease the timebase, when the 'scope switches to 1GSa/s sampling rate, the signal completely attenuates.The BW of the scope is 100MHz, so I'm expecting the signal to be attenuated anyway - but why does sampling at 2 different rates cause a massive difference in measured input voltage level?Is it because there's 2 different Anti Alias filters for the different sample rates and they behave differently? Or is something wrong with the 'scope?

author: jamfletch
author_rank: Contributor
timestamp: March 24, 2025, 02:56:46 pm
content: I've repeated the same test @ 100MHz (edge of BW). At a sample rate of 500MSa/s the measured voltage is about 5% higher than at 1GSa/s. I've also now realised the frequency counter is displaying 100MHz when I'm sampling at 500MSa/s, implying that the 400MHz signal is aliasing back down to a lower frequency?

author: jamfletch
author_rank: Contributor
timestamp: March 24, 2025, 08:35:03 pm
content: I've had a read through Performa01's review of this series of 'scopes, specifically the BW section. From his report, it looks like the BW is set by DSP in the firmware. We have the 1104XE model (100MHz). I imagine this is so the manufacturer can use the same design for both the 100MHz and 200MHz BW versions. I couldn't find any datasheet information on amplitude change over sample rates.Here's what I think might be happening : when the timebase is set to a short enough time the sample rate goes to it's maximum of 1 GSa/s. So for the 400MHz sinusoid measurement, it's being attenuated by the rolloff in the front end vertical amplifier + whatever filter is used in DSP, and thus we see barely any pk-pk voltage when we try and measure with a short time base.When the sample rate is 500MSa/s or lower, the 400Mhz sinusoid is aliasing back inside the bandwidth of the DSP filter possibly, and therefore you see the signal as much larger?
THD measurement with Hioki DT4261 and CM4141-50 (Video) - Page 1
Forum section: electronics / testgear

author: Jiri Bekr
author_rank: Contributor
timestamp: October 04, 2022, 04:08:09 pm
content: Hi,This video features Hioki DT4261 and CM4141-50 from new series of Hioki DMMs, that utilize sophisticated ADC that enables them to perform THD calculations with 0,01% resolution, that can be seen only in industrial analyzers. Having this ability packed in classic hand multimeter or classic clamp meter enables electricians to have 2 in 1 device, that could in many cases substitute for expensive portable power analyzers for field use. Finding the root cause of the problem with field multimeter, one is then able to order company for (expensive) thorough network analysis at the right place, so counter-measures are applied.Video has chapters markers and contains following:Basics about FFT so that we understand definition of THD.What problems does high THD cause to production lines, power factor capacitors, or LEDs and UPSHow THD is usually measured, and how to measure it with Hioki DMM / clamp meterHow exactly does the THD measurement in app work (demonstration)How can we fight against THD, so that we can lower it, or suppress them for sensitive devicesPlease apologize for not having footage from electrical distribution room. I have actually recorded one, but with forehead camera w/ low quality. Since I am professional electrician, being distracted by cameras on tripods during working near live busbars is no-go for me. So the video is more like sitting and talking. I hope you understand.Video link:https://youtu.be/FNd7v7PcdfcAttached is thumbnail of the video and few screenshots

author: Fried Chicken
author_rank: Regular Contributor
timestamp: March 23, 2025, 04:40:23 am
content: Fantastic

author: Jiri Bekr
author_rank: Contributor
timestamp: March 23, 2025, 09:53:45 am
content: ThanksSee also my review on Hioki clamp meter with this capabilityhttps://www.eevblog.com/forum/testgear/review-acdc-clamp-meter-hioki-cm4375-50/msg5849191/#msg5849191

author: Fried Chicken
author_rank: Regular Contributor
timestamp: March 25, 2025, 12:47:26 pm
content: Quote from: Jiri Bekr on March 23, 2025, 09:53:45 amYeah I saw that as well!
Is it worth buying another brand of clamp meter? - Page 1
Forum section: electronics / testgear

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: March 24, 2025, 03:27:18 pm
content: I owned a CEM DT-3352 clamp meter, the truth is that it has not failed me, a friend needed one but the ones for sale in my city were not very good, so as mine was immaculate he bought it, now it is worth buying the same one, or the model is very old, and now there are more complete ones, I am in no hurry to buy another one, but that model is excellent, since it could even detect small current leaks, the bad thing is that the reviews that I read or see do not convince me much, here in Argentina you can still get the CEN DT--3352 for about 270 dollars, which is what they paid me, but it saved the 7 days of waiting, and I was able to test it if it worked well.in spanishyo poseia una pinza amperometrica CEM DT-3352, la verdad que no me ha fallado, un amigo precisaba una pero las que habia a la venta en mi ciudad no eran muy buenas, asi que como la mia estaba inmaculada me la compro, ahora vale la pena comprar una igual, o el modelo es muy viejo, y ahora las hay mas completas, no tengo apuro en comprar otra, pero ese modelo es excelente, ya que hasta se podia detectar pequeñas fugas de corriente, lo mao que los review que leo o veo no me convencen mucho, aca en Argentina se sigue consiguiento las CEN DT--3352 a unos 270 dolares, que es lo que me la pagaron a me, pero se ahorro los 7 dias de espera, y la pudo probar si funcionaba bien.

author: tunk
author_rank: Super Contributor
timestamp: March 24, 2025, 03:46:48 pm
content: I don't know what accuracy you need or what's available in your contry.But Kerry Wong has recently reviewed the ZOYI ZT-QS7 which can behad on aliexpress from around US$35:https://youtu.be/9BIOzjlvFJE

author: Aldo22
author_rank: Super Contributor
timestamp: March 24, 2025, 07:37:27 pm
content: It depends on what you want to measure.With the Zoyi ZT-QS7 or the Owon CM2100B you can measure mA, but not currents over 100A (AC and DC).The Owon has Bluetooth. This should not be underestimated, as it is often not possible to attach the clamp meter in such a way that it can be read easily.This problem can be avoided with the Owon.It can also log data (max. 2 measurements per second) and display it graphically.The screenshot in the attachment shows a drilling machine starting up.
VETE: Philips PM6307 wow and flutter meter opinions, advices - Page 1
Forum section: electronics / testgear

author: RiRaRi
author_rank: Regular Contributor
timestamp: March 21, 2025, 04:01:09 pm
content: I have an offer for Philips PM6307 wow and flutter meter and i would like to know if anyone is using it and what you think about it. Also, want to ask if this "drift" meter is for general speed of tape or turntable motor so i can precisely adjust the speed trim pot using that meter. Thanks

author: RiRaRi
author_rank: Regular Contributor
timestamp: March 24, 2025, 05:23:26 pm
content: Anyone using wow and flutter meter?

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: March 24, 2025, 05:50:12 pm
content: Hi RiRaRi,i don't have one.You'll got to have the Test-Tape or the Test-Record (3150 Hz) to use it.Manual can be found at:https://manuals.sterremuur.nl/Misc/Meetapparatuur/Philips/Philips_PM6307_Manual+Servicedoc_en.pdfGood luck
Gophert vs Riden(RuiDeng) reliability and price performance. Or anything else? - Page 1
Forum section: electronics / testgear

author: Piotrix
author_rank: Newbie
timestamp: March 23, 2025, 11:53:06 pm
content: I am looking for users feedback on Power supplies.Namely Gophert vs Riden(RuiDeng) PSU reliability and price performance or anything else that is reliable and has smillar price.I looking to buy a second bench power supply for various projects. In 99% of the cases 32V 5A should be enough for me. I am debating between Gohpert and Riden RK6006-C.Because of my current space limitation form factor of both of this models is optimal for me.What I like a lot about Gohpert is I think very efficient UIno needless bells and whistles. I like its layout a lot I actually don't need cable connections in front I prefer to have them on back not to obstruct the view of the screen Also according to VotLog Youtube channel it has less ripple than Riden.On few occasions I had a access Riden R6024 with 1500W psu.Even though I an an IT person I did not care for Riden display and very extensive menu. Is it really useful? Am I am not understanding something ?Currently Riden RK6006-C has a discount price on their Aliexpress Store of ~67€. This is little tempting to me because of power to price ratio.The obvious flaw the version with build in psu is, that according to pictures it has wrong layout for proper air circulation.Both Riden (until I think 4A when the fan kicks on) and Gophert are silent.Obvious flaw of my Gophert other then questionable reliability (See this post for detailshttps://www.eevblog.com/forum/repair/gophert-cps-3205-ii-sporadic-oup-errors/msg5858189/#msg5858189) is the fact that on small currents bellow 90mA it is not accurate at all and shows 0 current draw.What is the consensus over here what would be the better choice? Specially in terms of reliability accuracy and long term usage.
Fluke 8-pole male connector p/n 5322 264 50269 Lemo p/n ? mates with PM6304   - Page 1
Forum section: electronics / testgear

author: murrayatuptown
author_rank: Contributor
timestamp: March 22, 2025, 10:55:08 pm
content: Does anyone know the 'street' p/n for Fluke 5322 264 50269 8-pole male (Lemo?) connectorMates with PM6304 (& possibly others) front panel female connector.Probably part of PM9541A 4-wire Kelvin test cable.Thank youMurray

author: mapleLC
author_rank: Frequent Contributor
timestamp: March 23, 2025, 09:50:39 am
content: Its a Lemo B series.FGG.1B or 2B -- this is the important code. It dictates the size of the connector. I think the Fluke is a 2B.Its likely an FGG.(1 or 2)B.308.CLADXXThe CLAD is the cable diameter, the 308, dont know about the 3 but the 08 is for 8 pins.https://www.lemo.com/int_en/solutions/originals/b-indoor-keyed.html?p=5There website is horrible, so good luck. I think I have a few 8 pins here if you need one. Scroll all the way to the bottom of the website to see the different connectors, there are like 300.
MOVED: Fresh from fleabay, Other Biddle 9 decade resistor box, photos - Page 1
Forum section: electronics / testgear

author: NANOJOLTS
author_rank: Contributor
timestamp: March 22, 2025, 03:35:09 pm
content: This topic has been moved toMetrology.https://www.eevblog.com/forum/index.php?topic=456259.0
HP 8559, does not switch bands - Page 1
Forum section: electronics / testgear

author: stepN.6072
author_rank: Newbie
timestamp: March 20, 2025, 10:38:12 am
content: Hi. I'm repairing this spectrum analyzer. And I'm confused about it. I can't switch bands. Basic range 0.01 -3 Ghz. It works. But after switching to a higher band, the basic range is still displayed. I checked the A7, A12 boards and found nothing. I suspect the First mixer. Do you know what the currents (bias) for the diode in this mixer should be? Diode bias? How do you determine which harmonic is selected?

author: scopeman
author_rank: Frequent Contributor
timestamp: March 22, 2025, 12:05:59 am
content: Check the rotary switch wafers for missing or broken contacts. These are famous for dropping off.SamW3OHM

author: stepN.6072
author_rank: Newbie
timestamp: March 22, 2025, 07:44:21 am
content: Thank you. I repaired the switches. I think they work properly....My reasoning: Either the diode bias currents for the first mixer are wrong (out of range) or the first mixer itself is defective. I can't find out anywhere what they should be properly.
Best Bench Power supply 0>60v Dual channel 10A+ - Page 1
Forum section: electronics / testgear

author: zboltman
author_rank: Newbie
timestamp: March 21, 2025, 07:14:17 pm
content: OK, time to upgrade my power supply. There are lots of em at TEMU and ALIEXPRESS, but are they reliable?Need a dual channel, 0-60VDC, with 10amps minimum.I have searched the ads and forums and did not really find anything fitting to my specs.Any suggestions are greatly appreciated.TIA

author: tautech
author_rank: Super Contributor
timestamp: March 21, 2025, 07:29:28 pm
content: Quote from: zboltman on March 21, 2025, 07:14:17 pmBudget ?The 4ch SPD4306X offers 2 channels @ 30V 6A that can be placed in Series or Parallel mode for 60V 6A or 30V 12A

author: temperance
author_rank: Super Contributor
timestamp: March 21, 2025, 08:01:29 pm
content: Double poster:https://www.eevblog.com/forum/renewable-energy/best-bench-power-supply-0gt60v-dual-channel-10a/msg5856071/?topicseen#msg5856071
Aneng 683 Pro - Page 1
Forum section: electronics / testgear

author: LektroiD
author_rank: Frequent Contributor
timestamp: March 21, 2025, 03:08:44 pm
content: Hi test-gear aficionados,I’ve come across this all-singing, all-dancing meter, and I’m really tempted to buy it. I already own several Fluke meters, including the legendary 87V, but this budget-friendly "chinesium" touchscreen meter with a mysterious “Live Zero Fire Line” (whatever that means?) has caught my attention. At the price point, I’m seriously considering pulling the trigger.I’ve watched a few videos on earlier models (681/682), and they seem decent for ballpark measurements. But I’m wondering if the 683 model offers better accuracy?If anyone has seen a solid review or has experience with this meter, I’d love to hear your thoughts.https://www.aliexpress.com/item/1005007892180890.html

author: Aldo22
author_rank: Super Contributor
timestamp: March 21, 2025, 03:17:11 pm
content: Quote from: LektroiD on March 21, 2025, 03:08:44 pmAccuracy does not seem to be the strong point of this DMM.For that I would recommend the ZT-225 in this price range:https://de.aliexpress.com/item/1005007244323221.htmlBut it doesn't have a touch screen, if that's important to you.
Siglent SDS 1072CML+ stuck on boot screen - Page 1
Forum section: electronics / testgear

author: brcam25
author_rank: Newbie
timestamp: March 21, 2025, 08:42:27 am
content: Hello community,Before opening this topic I already looked and tried but unfortunately I'm really stuck with my oszi.I have Siglent SDS 1072CML+ which is stuck on boot screen.I do have console access and I already tried with USB drive and SD-Card but seems non of those is recognized, and at least I don't see any power output on the USB port.Can someone please help me with other ideas?Regards,B

author: tautech
author_rank: Super Contributor
timestamp: March 21, 2025, 09:23:22 am
content: Welcome to the forum.Contact the chaps at EU HQ for a recovery package.info-eu@siglent.com
Web interface for Rigol DL3000 electronic load? - Page 1
Forum section: electronics / testgear

author: incf
author_rank: Frequent Contributor
timestamp: March 20, 2025, 05:18:31 pm
content: Does anyone know anything about the password protected web interface in the Rigol DL3000 electronic load?It seems to be totally undocumented. (Halfway hoping for a web interface similar to what my Rigol scope has)The default password is not "rigol", "admin", "111111", or "password".

author: MarkF
author_rank: Super Contributor
timestamp: March 20, 2025, 06:01:04 pm
content: Don't have their load.You might try the same password as used on their scopes: "111111".Ref to:https://www.eevblog.com/forum/testgear/rigol-ds1202z-e-ds1000z-password/

author: incf
author_rank: Frequent Contributor
timestamp: March 20, 2025, 06:10:16 pm
content: no luck
Owon 220V SPE3103 vs 110V SPE3103 (Convert 220V to 110V and vice versa) - Page 1
Forum section: electronics / testgear

author: u666sa
author_rank: Frequent Contributor
timestamp: March 19, 2025, 12:44:54 pm
content: I liked this power supply so much I bought a second one, 110V.You'll have to press F5 several times to get all images loaded, 15 images in total.Here is 110V versionHere is 220V versionLooks identical. I wonder what will have to be changed to make 220V into 110V?

author: tunk
author_rank: Super Contributor
timestamp: March 19, 2025, 01:17:24 pm
content: There's one difference: in the 110V version, betweenthe bridge rectifier and one of the caps, there's aconnector/wire which isn't there in the 230V version.Also check the voltage ratings of the two caps.

author: Hydron
author_rank: Super Contributor
timestamp: March 20, 2025, 08:14:59 am
content: What's the output voltage noise like on yours? Mine was so bad (also the fan was very noisy in a different way) that I had to return it - a shame given it looked to be very good value. I guess if you're using it for charging batteries or something it would be fine.

author: u666sa
author_rank: Frequent Contributor
timestamp: March 20, 2025, 10:34:24 am
content: Quote from: Hydron on March 20, 2025, 08:14:59 am40 to 55. Measured properly with cap and 20 MHz bandwidth limit, in somewhat clean room, without notebook and light bulb noise.Quote from: Hydron on March 20, 2025, 08:14:59 amNotebook, iphone, ipad repair.

author: u666sa
author_rank: Frequent Contributor
timestamp: March 20, 2025, 12:51:33 pm
content: Quote from: tunk on March 19, 2025, 01:17:24 pmThat did it! Thanks. Now 220V version works just fine on 120V line.
Huntron Tracker 2000 Switchers - Page 1
Forum section: electronics / testgear

author: Z. Khalid
author_rank: Contributor
timestamp: March 20, 2025, 07:10:11 am
content: Hello,- Have any of you guys used Huntron Switchers with the Tracker 2000?- What are the main differences between the HSR 210 and HSR 410 Switchers?I'm going to buy a Switcher for my Tracker in question. Are there any recommendations?Thank you in advance!
Hantek DSO2D15 puzzling question about "Statistics" - Page 1
Forum section: electronics / testgear

author: i_am_patch
author_rank: Newbie
timestamp: March 11, 2025, 01:16:16 am
content: I have a question about the DSO2D15When looking at "Statistics" (Measure/Statistics) is there any way to reset the counter ?On scopes I have used in the past there was always a "reset" or "clear" button to clear the "statistics" results so that the averaging can be re-started at the point that you pressed it.For example if you are looking at the average frequency of an input signal over time (say 60hz) and there was a signal interruption, or you changed frequency (say to 100hz) and you would like to try and see the average of this new frequency usually you would just have to press the "clear" button and look at the average again.Not the case with this scope.If you turn OFF "statistics", and then back ON it continues counting the averages so in this case you would see a number around 80hz (the average of the 2, rather than the average of the 2nd frequency that is now being measured)The work-around for me presently is to clear the statistics and then re-select the item (or in my case multiple items...Voltage, Frequency, RMS, P-P....) and set it up again to measure "Statistics" , very cumbersome.Perhaps this feature is available in a new firmware ? or there is a button or selection that I am missing ?-Thanks in advance.(DSO2D15 ; f/w 3202, s/w 1.0.1.1.0 20210726.00)

author: Aldo22
author_rank: Super Contributor
timestamp: March 11, 2025, 09:36:20 am
content: I am also only aware of this solution (re-select).Please use the general thread of this model for further questions:https://www.eevblog.com/forum/testgear/hantek-dso2x1x-models-master-thread/

author: i_am_patch
author_rank: Newbie
timestamp: March 20, 2025, 02:18:11 am
content: Thanks for the reply.Sorry about not posting in the correct location...I see that now.