hybridfree/eevblog-posts huggingface dataset:
Openterface KVM Ext. for uConsole: uConsole As A Kvm Console - Page 1
Forum section: electronics / testgear

author: TechxArtisan
author_rank: Newbie
timestamp: August 25, 2025, 06:06:19 am
content: Control headless devices using your uConsole via direct HDMI and USB connections for on-the-go troubleshooting and seamless device managemen.The Openterface KVM Ext. for uConsole is a compact extension board crafted to unlock new capabilities for your uConsole. Designed as a plug-and-play solution, it transforms your uConsole into a fully functional KVM console, eliminating the need to carry extra monitors, keyboards, or mice when managing headless devices.Setup is straightforward: simply replace your uConsole’s 4G/LTE module with the KVM extension board, install the Openterface Connect App, and you’re ready to control target devices directly. Whether you’re an IT technician maintaining servers in the field, a developer debugging embedded systems, or a maker working with single-board computers, this extension turns your uConsole into an all-in-one control hub.Built on the open-source Openterface KVM platform, it’s designed to grow with community input—perfect for users who want to customize functionality to their needs.Video：https://youtu.be/OyVeDDlDbN0Features:Seamless Integration: Matches the 37x77mm dimensions of the original 4G/LTE module for a perfect fit.Direct Control: Offers HDMI input and USB HID emulation for direct interaction with target devices.Low Latency: Ensures responsive control with minimal delay, suitable for BIOS-level access and troubleshooting.Portable Design: Leverages the uConsole's compact form factor, making it an ideal tool for on-the-go IT tasks.Open-Source Compatibility: Built upon the open-source Openterface KVM platformhttps://openterface.com/, encouraging community-driven enhancements.Use Cases:IT Maintenance: Quickly access and manage servers or network equipment without the need for bulky KVM setups.Development: Test and debug embedded systems or single-board computers directly from your uConsole.Field Work: Ideal for technicians requiring a portable solution to interface with various hardware in diverse environments.Open Source Plans:We’re not quite ready to share the code just yet there’s still some tidying up to do behind the scenes! But good news: we’re diving into the beta phase, and once hardware and software are feeling nice and polished, we’ll fling the doors open for everyone to explore.In the meantime, we’re growing a fun open-source crew over on Reddit at r/Openterface_miniKVMhttps://www.reddit.com/r/Openterface_miniKVM/. It’s where IT pros and enthusiasts can chat bugs, brainstorm cool new features, and even cook up custom tweaks that fit their needs all to keep the innovation and collaboration vibes going strong.We’d love your help shaping this project, and any contributions will definitely get a big shoutout in our thank-you list. Thanks for sticking with us while we spruce things up we’re almost there! 😊
Deskew voltage probes - Page 1
Forum section: electronics / testgear

author: slugrustle
author_rank: Frequent Contributor
timestamp: August 22, 2025, 12:15:00 am
content: I ran a test recently with a few different types of passive voltage probes:700MHz 10x, 0.5ns rise time250MHz 100x, 1.4ns rise time1.5GHz 100x, 0.24ns rise time (50Ω terminated, 5kΩ impedance)The waveforms "looked right" for what I was doing, but I'm curious how much skew there might be between these probes.What is a good way to check skew between voltage probes?I have a fixture to look at skew between a voltage probe and a current probe, but it's not really set up to connect more than one voltage probe.I am contemplating building an avalanche transistor pulser like in the Jim Williams AN-94 app note. But maybe that's overkill?Another thought is to connect my signal generator (3.8ns rise time) to a custom circuit board with a BNC connector, 50Ω terminator, and copper strips for probe connections—I almost always use spring tips and swivel grounds when probing to reduce loop area. The concern here is that the generator rise time is longer than any of the probes.

author: David Hess
author_rank: Super Contributor
timestamp: August 22, 2025, 02:23:51 am
content: A fast edge is all that is required, but it does not require anything like an avalanche generator. The sync output on your function generator will be plenty fast.The two probe tips could just be connected to the same output, but I sometimes use a BNC splitter.

author: tautech
author_rank: Super Contributor
timestamp: August 22, 2025, 03:00:57 am
content: Quote from: slugrustle on August 22, 2025, 12:15:00 am4ns should be more than fast enough as you would normally zoom the timebase right in to see the skew error and adjust to null it.You can see my screenshot from the Siglent deskew fixture here and its RT is only ~70ns at best:https://www.eevblog.com/forum/testgear/scope-probe-deskew-fixture-pcb-project/msg3169004/#msg3169004
HP8753C teardown - Page 1
Forum section: electronics / testgear

author: ZR6AJJ
author_rank: Newbie
timestamp: August 22, 2025, 10:43:31 am
content: Good day all.I have been given two HP8753C VNA with HP85046A s-par adaptors.They were stored in a shipping container and both absorbed water, one shows visible corrosion.I plan to disassemble them completely, but I can't find a procedure or detailed diagram in the manuals.What foxes me is the use of rivets to attach to the main board.Does one drill the rivets out?
Keithley 230 voltage source - what to do with it? - Page 1
Forum section: electronics / testgear

author: inse
author_rank: Super Contributor
timestamp: August 19, 2025, 07:43:56 am
content: So I got this Keithley 230 voltage source for free, checked and calibrated it.And now, what to do with it?I don’t need a DC calibrator for 3-1/2 digit multimeters…Do you have ideas for interesting things to do with it?

author: BradC
author_rank: Super Contributor
timestamp: August 19, 2025, 07:53:13 am
content: What sort of power can it supply? A bit left field, but it's not unusual to use programmable voltage sources to tweak the sound of valve guitar amplifiers.

author: HighVoltage
author_rank: Super Contributor
timestamp: August 19, 2025, 07:56:11 am
content: In general the 230 is good for I–V sweeps, you can go to 101 Volt and 100 mAThe Keithley 230 is a very good, well thought out instrument, also good for material science.

author: inse
author_rank: Super Contributor
timestamp: August 19, 2025, 08:02:42 am
content: Three levels of current limit can be selected, 2mA, 20mA and 100mA, it’s not a source meter unit.

author: BradC
author_rank: Super Contributor
timestamp: August 19, 2025, 08:07:54 am
content: Haha. Ok my bad. I read that as a Keithley 230V voltage source and made the assumption is was basically an AC voltage source.

author: Hydron
author_rank: Super Contributor
timestamp: August 19, 2025, 09:36:52 am
content: If you've got the bench space then another programmable voltage source is always handy (assuming you have gpib capability, and have fun with the "R2D2" language these brown-era keithleys use!) This is a ~40 year old design so the relatively simple feature set is more reasonable in that context (though they did make some much more exciting instruments in that era too, I've got a fewtoo manyof them.)
Keithley 6487 Picoammeter / Voltage Source: Uses?  Can it function as a SMU? - Page 1
Forum section: electronics / testgear

author: neverendingstudent
author_rank: Regular Contributor
timestamp: August 18, 2025, 06:48:45 am
content: So, like a number of us here, I buy and sell T&M gear. I recently won a Keithly 6487 at auction on the basis that I got it well below the going rate on eBay sold listings so at worst I could sell it for a profit.Putting it up for sale aside, I am interested in it as a precision source (there are never enough precision sources!!!! I must have them all!). I know it's meant for ultra-high resistance measurements (sourcing HV and measuring ultra-low amps), but the voltage source (even just connected by 2-wire) is fairly accurate - I'm currently reading 10.00012xx volts on my 3458A with the Keithley set to output 10.0000V - and I don't think it's fully warmed up yet because it is gradually lowering down further.I've downloaded the manual and looked through information there, but I'm seeing the triax being used for current measurement and haven't found if there is an option to switch it to (or use any other connectivity for) voltage sense - and I'm not going to be an idiot with an input that looks to at least be a default current measurement input and supply voltage to it. No idea if it is strictly current only or if it has relays that allow it to swap function, or if any of the other rear connectivity can be configured for voltage sense function.The heart of my question here is this: how usable is this device as a precision voltage source, and what configuration should I be using for that purpose? Does it have any configuration to work as a voltage-source SMU with voltage-sense?Pre-click-post edit: in the ~5-10 minutes between when I started this post and now my reading has reached 10.00008xxV as displayed on the 3458A. Still warming up I suppose, looking good so far.Thanks everyone!

author: Hydron
author_rank: Super Contributor
timestamp: August 18, 2025, 01:52:39 pm
content: I think the name of the instrument pretty much sums up the capabilities (other than that you can get it to calculate resistance for you). Still useful for analysing semiconductors, high resistances etc but yes it's limited compared to a proper SMU.

author: neverendingstudent
author_rank: Regular Contributor
timestamp: August 18, 2025, 06:48:27 pm
content: Yeah, that makes sense - I didn't want to assume that to be the case and pass up on useful capability, but it looks like you have the right of it. Thanks Hydron.

author: DaJMasta
author_rank: Super Contributor
timestamp: August 18, 2025, 08:12:24 pm
content: It's a two quadrant power supply and a very sensitive ammeter, so you can get very limited SMU-like performance for specific applications, and it has automated I-V sweep capabilities, but it doesn't have the normal dynamic range or two more quadrants of an SMU, and is intended as titled - for very high resistance and very low current measurements.
Lecroy PXD 222 PXI osciloscope /digitizer Drivers  - Page 1
Forum section: electronics / testgear

author: Elektrongeek
author_rank: Contributor
timestamp: July 30, 2025, 08:50:57 pm
content: Hello everyone.I managed to get my hand on an old PXI rack that contains a lot of NI boards and one Lecroy PXD 222 PXI osciloscope /digitizer.I managed to restore an OS on the PXI Controller and find the driver for almost everything except : The Lecroy PXD 222 PXI osciloscope /digitizerOnline I only managed to find the manual but no drivers !Does anyone here have an image of the CD ?Best regardsJérémy

author: NANOJOLTS
author_rank: Contributor
timestamp: August 18, 2025, 05:02:23 pm
content: I may have some drivers? + soft front panel. I had a PDX 1021 YEARS AGO.Nano
Where can I get software that lets me make 16M point waveform for my Rigol1022Z? - Page 1
Forum section: electronics / testgear

author: Ben321
author_rank: Frequent Contributor
timestamp: August 18, 2025, 01:30:34 am
content: I have a Rigol 1022Z function generator with the 16M sample option to make much longer waveforms. However, the PC software from Rigol (that lets you generate waveform files to put on USB stick to load into the funcgen), doesn't let you make 16M waveforms for the Rigol 1022Z. You need to select your model of funcgen when you use the software, and it doesn't let you generate a waveform with any more samples than would be used for the default configuration of the 1022Z (I think it has a limit of like 32 thousand points). I can generate a file for other models that by default have more features like 16M points (which of course are much more expensive Rigol funcgens), but the files for those other Rigol models don't have exactly the same internal format as the files used by the Rigol 1022Z.So my post here is based on the hope that some third party has managed to write their own waveform making software, that can output up to 16M points, while also maintaining compatibility with the Rigol 1022Z (which could be done if the software author had reverse engineered everything about the 1022Z files).

author: shabaz
author_rank: Frequent Contributor
timestamp: August 18, 2025, 03:34:39 pm
content: I don't have that instrument (I did a few years back but I sold it) nor ever tried creating an arbitrary waveform for it, however, I would imagine that if you need a waveform of such length or complexity, then you'd probably want to create it programmatically anyway (e.g. using Python or MATLAB) or from a source file such as WAV or CSV.One general approach could be to create a few much smaller test waveform files using the manufacturer app, and open them using a text or hex editor (depends on the format the mnfr used), and then look to manually decode the header (assuming that it's not documented, worth checking first).Then, build your desired waveform in Python/MATLAB etc., coded to write to a file in the same format (with the header prepended).If you're not fully comfortable coding this, you could use AI to help you along (it should perform fairly well since you're not doing anything too uncommon, basic data manipulation from one format to another, and reading files and writing to disk, are not unusual tasks), and then you could examine the generated file output to see if it's correct.
AWA 3 pin connector - Page 1
Forum section: electronics / testgear

author: David Aurora
author_rank: Frequent Contributor
timestamp: August 13, 2025, 05:27:48 am
content: Anyone got a source/name for the matching male connectors for these before I retrofit something else? I've got a couple different units here with these but haven't been able to find plugs to fit. Manual says it's "Siemens Type 9, Relkli 6a 3-way balanced or similar" but I'm finding nothing.Spacing is not standard banana, it's roughly about 9mm between top connections and 12mm between bottom connections

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: August 13, 2025, 06:56:41 am
content: Hi David,too bad you'r in "Australia - not Austria" (TM). ;-))From some old R&S and Wandel & Goltermann-equipmenti still have some of these floating around somewhere.You can use normal 4mm-banana-plugs and terminate theother end with XLR or any connector of your choise.Good luck

author: David Aurora
author_rank: Frequent Contributor
timestamp: August 13, 2025, 07:06:02 am
content: Thanks!Yeah that's what I've done in the past but I'm hoping to track down a neater solution. I can of course just replace the plate and connectors but given I have a few units with these connections I thought it'd be nice to have some on hand

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: August 13, 2025, 07:22:43 am
content: Hi David,..just looked up shipping-rates on DHL:Cheapest pack 2kg (no tracking, no insurance) costs 17;-€.2kg with tracking and insurance is 27,50€.Dont know if it's worth for you.Have a nice day

author: trobbins
author_rank: Frequent Contributor
timestamp: August 13, 2025, 08:27:48 am
content: Siemens and Halske 3-pin plug/socket.Perhaps ask around any old-timer techs or radio people or clubs.

author: rf-messkopf
author_rank: Regular Contributor
timestamp: August 13, 2025, 09:00:27 am
content: These have been common on old German telecom test equipment. They are usually referred to as "TF-Stecker", a Google search for that turns up a few hits.https://surplus-elektronik.de/Kabel-Adapterkabel-Verbindungskabel-sonstige-Kabel/Siemens-2x-TF-Stecker-mit-ca-3-m-Kabel::3310.html

author: David Aurora
author_rank: Frequent Contributor
timestamp: August 18, 2025, 12:13:45 am
content: Thanks guysI think I'm just gonna remove these after all and replace with something more convenient
LCX-Z5 Photo Request - Page 1
Forum section: electronics / testgear

author: lucasc
author_rank: Newbie
timestamp: August 17, 2025, 02:40:53 am
content: Does anyone out there has access to a LCX-Z5 fixture? I'd love to know what's inside. It seems like it's just wires connecting BNC input to BNC output, but I'd like to confirm and to know if they are crossing things over. I'd buy one myself if it didn't cost 600 bucks for a used one. Also, if it has some real reason why it should cost that much and not just wiring that can be put together in half an hour, I'd like to know so I save some money to eventually get one.Cheers!

author: Kean
author_rank: Unknown
timestamp: August 17, 2025, 06:00:54 am
content: You might want to look at the Tonghui TH26038 transformer test fixture at about 1/10 that cost, although it it only specified to 10kHz instead of 100kHz for the R&S LCX-Z5.Not used either myself, but they look surprisingly similar. The cost is likely due to low demand and the time spend characterising them.There is also a TH26038A, but not much info on the difference other than the first being for the TH2817C/TH2825A, and the A model for the TH2817C+.

author: lucasc
author_rank: Newbie
timestamp: August 17, 2025, 01:29:28 pm
content: Hi Kean,Much appreciated! I’ll take a look at your recommendation and I may get one of those. If I do, I’ll share here what is inside these fixtures.

author: KungFuJosh
author_rank: Super Contributor
timestamp: August 17, 2025, 02:37:13 pm
content: Those fixtures are often made by TongHui and rebranded for others, I believe that includes R&S. TongHui's documentation and datasheets aren't always accurate.

author: Kean
author_rank: Unknown
timestamp: August 17, 2025, 02:41:07 pm
content: I see them listed on Batterfly website (zero strock), but also from a seller who I've dealt with on AliExpress (although I only found it listed on their Alibaba page).https://www.batterfly.com/shop/en/tonghui-th26038https://www.batterfly.com/shop/en/tonghui-electronic/tonghui-th26038ahttps://www.alibaba.com/product-detail/Tonghui-TH26038-Transformer-Test-Fixture-Fits_1601250516978.htmlIf you don't have an Alibaba account, you can also try asking the seller (CKT) about it on their AliExpress page - they helped me source some Tonghui gear in the pasthttps://www.aliexpress.com/store/3651072

author: KungFuJosh
author_rank: Super Contributor
timestamp: August 17, 2025, 03:23:05 pm
content: There's also the SourceTronic option:https://www.sourcetronic.com/shop/en/transformer-test-adapter-st26038.htmlDoes anybody know if this works with the TH2830/TH2832 also?
Rigol MSO5074 Problems - Page 1
Forum section: electronics / testgear

author: einnicernutzer
author_rank: Newbie
timestamp: August 16, 2025, 01:31:38 pm
content: Hi,I have a Problem with my MSO5074, all of a sudden it says everytime i do anything "Setup Save Failure" and in addition the touchscreen doesnt work if the Tpuch Lock button is pressed or not.There already was a similar post about this but the suggested solution did not work. I tried resetting like it said and even up / downgraded the instrument with no success.Is this a "common" Problem? I have only found the post mentioned above and nothing else... Or am i just stupid?I mean thr scope "works" but the touchscreen and the ever occuring error message is very annoying.Anybody know something about this?
Fnirsi 2c53 System file  - Page 1
Forum section: electronics / testgear

author: Gianpz
author_rank: Newbie
timestamp: August 16, 2025, 03:48:03 am
content: I need someone to switch their version to 1.0.3 and send me a zip of the 'system file' folder, please.I accidentally deleted that folder which is only in version 1.0.3 (I think).
Atorch DL24 no longer works with UART ?! :( - Page 1
Forum section: electronics / testgear

author: IDK
author_rank: Newbie
timestamp: August 17, 2025, 01:34:40 pm
content: Hi everyone,after spending way too much time searching without any real results, I’m hoping someone here might have figured this out already.I picked up a few Atorch DL24 150W electronic loads to run automated tests on LiFePO4 cells — including current/voltage curves for the individual cells. I specifically chose the DL24 because there are quite a few Python projects out there that can log data or even control it over UART.It looks like Atorch has changed the hardware (and software). The new units no longer show up as UART devices on the PC, they register as HID instead (both under Linux and Windows).Here’s a quick snippet from dmesg:Code:[...] usb 1-1.5: new full-speed USB device number 4 using dwc_otg[...] usb 1-1.5: New USB device found, idVendor=0483, idProduct=5750, bcdDevice= 1.00[...] usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3[...] usb 1-1.5: Product: ATORCH DL24 V1.1.0[...] usb 1-1.5: Manufacturer: APP[...] usb 1-1.5: SerialNumber: 941375[...] hid-generic 0003:0483:5750.0001: hiddev96,hidraw0: USB HID v2.01 Device [APP ATORCH DL24 V1.1.0] on usb-3f980000.usb-1.5/input0The bundled software does run (kind of), but it’s really not suitable for what I need.So my question: has anyone here already worked with one of these newer HID-based DL24 units and managed to talk to it directly (without relying on the stock software)? If so, how did you do it?Any hints or ideas would be much appreciated!Kind Regards
HP 8566B & 8672A Temperature? - Page 1
Forum section: electronics / testgear

author: W4PJB
author_rank: Regular Contributor
timestamp: August 12, 2025, 02:00:57 am
content: I recently moved and built a new bench, and although there's a few inches between instruments, it's definitely tighter than in the past when most of my instruments were stacked in free-space.This evening I had my 8566B on for an hour or so, along with my 8672A which is next to it, and I noticed the front panel was getting quite warm. I don't recall this in the past. I dragged out my trusty FLIR cam and the max temp was 111*F. The 8672A was max 116*F. It wasn't confined to one small area, the entire front panels of both instruments were warm. My 8665B, which is right above my 8672A was fine, although it had been on for just as long.How much airflow is required around these? I often see them in rack-mounts, so I would expect they can be packed pretty dense. Both units are clean inside and all fans are working and clear. Current temperature in the "lab" is 75*F and 38% humidity.And has anyone else noticed the front panels on their 8566B or 8672A get rather warm?Pics attached.

author: cncjerry
author_rank: Unknown
timestamp: August 18, 2025, 11:53:23 pm
content: My 8566b was never that warm or I think I would have noticed. Are the fans running? I live outside San Francisco and it is cooler here.

author: W4PJB
author_rank: Regular Contributor
timestamp: August 19, 2025, 12:17:03 am
content: Thank you for your reply. Yes, fans are running. I never noticed them being this warm either, but in my previous setup they were in free-space on the bench. There's about 2 inches either side now, and what should be adequate space behind them. Surprised there is so much heat buildup.
How to calibrate Texio PDS-A Series PSU? - Page 1
Forum section: electronics / testgear

author: zhangwei638
author_rank: Newbie
timestamp: August 14, 2025, 10:08:06 am
content: Hello everyoneI have purchased a TEXIO power supply model PDS60-12A.I found that the voltage was a little offset and I want to calibrate it ,But can not find the manual.If anyone could help me it would be greatly appreciated, thanks!

author: Uunoctium
author_rank: Frequent Contributor
timestamp: August 14, 2025, 10:59:08 am
content: As Texico and GW-Instek using the same web presence, you can try if GW-Instek's SCPI calibration syntax responds.As an example here the programmer instructions of PSM series (page 18, Calibration Commands)https://assets.testequity.com/te1/Documents/pdf/insPSMprog.pdf
Noise Characteristics on SDG2042X and 6022X  - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: August 12, 2025, 11:56:07 pm
content: This may have been answered before, but we don't recall.What is the relationship between the Noise File parametersBandwidthand the outputAmplitudevs the actual output spectral content?We see something that indicates the -3dB Bandwidth is about 500 times higher than the Parameter BW setting (ie 1Hz BW Parameter setting equals ~500Hz actual -3dB BW). This is consistent on the few low frequencies we evaluated. The mid-band amplitude drops 10dB per decade (as shown on an FFT fixed length and frequency) of Parameter BW setting, which hints that the spectral density is being spread over a wider BW which follows Root BW result.Our particular SDG6022X shows that 11mv Noise Parameter Amplitude setting yields a ~10mv reading on the SDS800 and SDS3000X HD SD measurement and on a DMM6500 AC at lower frequencies (<1kHz). Our SDG6022X has Firmware version 37R6T3 and HW version 81-39.Also, note directly related, the SDG2042X won't allow a lower Bandwidth setting than 20MHz!! This has Firmware 38R4 and HW version 41-00.Any help is appreciated,Best

author: tautech
author_rank: Super Contributor
timestamp: August 13, 2025, 12:23:12 am
content: Mike, I know you don't have SDS2000X but instead the Plus versionBe a good idea to edit the topic title and maybe OP content.

author: mawyatt
author_rank: Super Contributor
timestamp: August 13, 2025, 12:55:12 am
content: Quote from: tautech on August 13, 2025, 12:23:12 amRob, These are SDG not SDSWish we had one of your SDS6000X + thoHowever we did update the base model names.Best
Tektronix Quick Connect Flex Solder Tips Kit for Z-Active P7300 Probe Series - Page 1
Forum section: electronics / testgear

author: calibrationfixture
author_rank: Regular Contributor
timestamp: April 20, 2024, 11:16:00 am
content: Hi to All,Some time ago I discovered that the 020-3155-00 Kit contains all Parts described in:https://download.tek.com/manual/Quick_Connect_Flex_Solder_Tips_Kit_Instructions.pdfLooks like an official Typo: 020-3055-xx.And some Sellers seem to split these Kits to create "additional funds":https://www.ebay.com/itm/284844967955https://www.ebay.com/itm/285379812854Calibrationfixture

author: JuliusJ
author_rank: Newbie
timestamp: August 09, 2025, 04:28:25 am
content: Came across this and I must agree that multiple listings on eBay and elsewhere shows the 020-3155 part number but don't include everything.I would also add though that the reason to sell them separately might not be related to 'additional funds' as you suggest, but possibly to provide a customer convenience. The entire kit is expensive, but not all users want all parts. Some might want the long resistors, some might want the short ones and others might want the tip-clip adapters.

author: calibrationfixture
author_rank: Regular Contributor
timestamp: August 09, 2025, 06:34:32 am
content: Hi JuliusJ,I bought some time ago a complete Set for USD 100.- (eBay Seller specyes1 accepted my Offer). Before buying it I downloaded the Document and examined thoroughly the Auction Pictures of the Package. It was sealed and for me the guarantee that nothing was removed.Calibrationfixture

author: JuliusJ
author_rank: Newbie
timestamp: August 12, 2025, 09:33:23 pm
content: That sounds like a great deal. I have no idea what these things are truly worth, and it doesn't appear that the eBay sellers do either.
Keithley 2450-CAL-KIT - Page 1
Forum section: electronics / testgear

author: shodan@micron
author_rank: Contributor
timestamp: June 18, 2020, 11:42:42 pm
content: void

author: JxR
author_rank: Unknown
timestamp: June 19, 2020, 03:00:03 am
content: Quote from: shodan@micron on June 19, 2020, 12:13:54 amThis could be all it is for all we know, unless someone has one to open up and check. It honestly wouldn't surprise me at all if it is just the a way to bring the force/sense high lines together minus the guard so you can plugin to other equipment using the rear terminals.I just made the equivalent of this thing last week so I could calibrate an old R&S power supply.Cost ~$20 in parts. I have no doubt R&S also charged a silly price for it like Keithley is doing with this thing.

author: aronake
author_rank: Frequent Contributor
timestamp: August 12, 2025, 04:42:10 pm
content: Apparently Tektronix are nice enough to tell what inside this mystery box. A capacitor!https://www.tek.com/en/support/faqs/what-is-the-2450-cal-kit
ATTEN ADS1102CAL+ DSO FIRMWARE - Page 1
Forum section: electronics / testgear

author: Sparky67
author_rank: Newbie
timestamp: August 12, 2025, 12:17:11 pm
content: I bought an ATTEN ADS1102CAL+ DSO recently and found it’s a bit buggy, going from English to Chinese on-screen when one unrelated button is pressed for example.I have read some threads about firmware updates to clear bugs using Siglent files from some time ago on here but I’m a bit confused as to which firmware file download is suitable for this scope. Mine is the ‘plus’ version and currently has firmware 1.9.0 131109.0Can anyone help with pointers to a definitive update file(s) or method please? Should I presume a .cfg file is also needed?
Picoscope 2204A Teardown - Page 1
Forum section: electronics / testgear

author: jumper385
author_rank: Newbie
timestamp: August 11, 2025, 05:05:52 pm
content: Hi All,I've struggled to find teardowns and internal photos of the Picoscope 2204A.Mine's finally become unusable enough for me to tear it open. To that end, I've attached some photos of it's board.PS. They're on imgur because of the large file size.https://imgur.com/a/7BVbPYR
what is a good cable finder/searcher? - Page 1
Forum section: electronics / testgear

author: hifihifi
author_rank: Contributor
timestamp: August 11, 2025, 12:28:00 pm
content: I am searching for 2 good cable finders. Max 250 eur/dollar ex vat each.1. to find ethernet cable, here is one example:https://www.conrad.be/nl/p/basetech-bt-300-wt-leidingzoeker-1010088.html2. to find a 230V cable in houses where do you not know where the cables are goiing in wall, ceiling, etc...Here an example, but it is more then 15 years old type I think.https://www.conrad.be/nl/p/kurth-electronic-ke701-leidingzoeker-doorgang-indentificatie-lijnvolging-onderbreking-3025519.htmlAre there better options?

author: Kean
author_rank: Unknown
timestamp: August 11, 2025, 12:38:33 pm
content: I have a Fluke IntelliTone Pro 200 Probe, but I rarely use it as I don't generally do cabling just troubleshooting. It is pretty good and works with my CableIQ Qualification tester as the toner.I also have my older Aegis CZ1000 Probe and Toner set. I don't know if these are sold outside of Australia.
Agilent e3631a power supply: Reducing buzzer volume possible? - Page 1
Forum section: electronics / testgear

author: hp3310a
author_rank: Regular Contributor
timestamp: August 09, 2025, 07:30:43 pm
content: The buzzer volume in my e3631a is a lot too loud for my taste, I'd like to reduce it by 50% or more. There doesn't seem to be a way to control it by software so I was wondering if it's possible to make changes to how it is driven.I don't know how the buzzer works exactly but according to the schematics (relevant portion copied from the service manual)......it is directly connected to the output of a micro controller (N87C51FA) which is pulled high. I presume that means the the output pulls the high side of the buzzer low in a PWM like fashion to produce click and beep sounds. It also would mean that it is driven directly from the power supply through resistor R7. Is that how it works?If so, would increasing R7 cause the volume to decrease?

author: RoGeorge
author_rank: Super Contributor
timestamp: August 09, 2025, 07:42:42 pm
content: Cover the buzzer with self-adhesive tape.
TDS5000B Display Upgrade - Page 1
Forum section: electronics / testgear

author: colorburst
author_rank: Regular Contributor
timestamp: August 08, 2025, 06:19:42 pm
content: A little while ago I had a conversation with another forum member about a potential display upgrade for these scopes, and a bit earlier there werequestionsabout it as well, so I thought I'd share my experience. This is more of an academic curiosity at this point, I don't recommend anyone actually try this.Upgrading the display is possible, albeit only on the B series and the maximum resolution tops out at 800x600. In addition, the increase in resolution doesn't apply to the scope display itself: the waveform overlay is still 500x400, only scaled up. All scope traces, including math waveforms and hi-res live channels, are drawn in the overlay by the scope hardware and thus subject to this limitation. However, the improved screen resolution remains useful for non-scope activities, like looking at schematics and light web browsing.I took the easiest route and installed a 10.1" VGA monitor with native 800x600. Its size happens to be just right so that the entire unit fits snugly into the front half of the old display assembly. The back half of the display assembly had to go and with it, the interface board where the power button plugs in. This wasn't a huge loss as the button flex was intermittent to begin with, so I've been using a switched outlet to power the scope. The monitor is powered from the internal 12V supply, and its VGA cable goes through the GPIB port opening and to the PPC board's VGA connector. There was no cutting of the aluminum chassis so the mod is completely reversible.By default, the scope is configured to run at 640x480 and it will force 640x480 output regardless of your settings in Windows: higher resolutions will render with a screen panning effect and lower resolutions will be letterboxed. To solve this, I reconfigured the straps on the PPC board for an 800x600 LCD. However, this wasn't necessary because if you use the PPC board's VGA connector, you can have the scope switch to the "CRT only" mode after boot and it'll respect your display settings thereafter.The final piece of the puzzle was getting the software to run with the increased resolution. In the end, I only got it working well enough for my own satisfaction: there are a few graphical artifacts and thermal printing is mostly broken. Works for me, but isn't ready for primetime.That's all I've got for now, hope you found this interesting.

author: madao
author_rank: Frequent Contributor
timestamp: August 09, 2025, 03:49:16 pm
content: I have access to 640x480 10,4" Panel with attached Touch.It is (nearly) electric drop in replacement (only mechanical adapter is requiered, PWM generator (LED Backlight) and other touch , adapter needed)Innolux G104-V1 and chinese 10.4 resistive touch (https://de.aliexpress.com/item/1005008378579657.html)Huge improvement of panel contrast and touch reaction.
SDM3055 and EasyDMM (Solved) - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: August 09, 2025, 12:54:16 am
content: I have no problem connecting to my SDM3055 or operating it via Easy DMM. So, that's all good. However, disconnecting just does not work. Every time I disconnect I have to reboot the 3055 to get control back locally.Is this normal?

author: tautech
author_rank: Super Contributor
timestamp: August 09, 2025, 01:10:15 am
content: Quote from: BillyO on August 09, 2025, 12:54:16 amUse the Local button on the front panel.

author: BillyO
author_rank: Super Contributor
timestamp: August 09, 2025, 01:20:06 am
content: Quote from: tautech on August 09, 2025, 01:10:15 amDOH!I swear, the last time I tried the "Local" button it did not work! Now it does.Maybe I should get a frying pan and make on omelet out of all this facial egg...Thanks Rob!

author: tautech
author_rank: Super Contributor
timestamp: August 09, 2025, 01:57:02 am
content: There is a wee trap in that the Local button also doubles as the Shift button as its primary function however all other features that require Shift are indicated in blue print but Local as a secondary feature is still in a black font indicating the Shift button has Local function when the DMM is in remote use.TBH I've been caught by this too but the few seconds to solve it had it stick in ones mind.
Usb microscope software - Page 1
Forum section: electronics / testgear

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: August 08, 2025, 10:07:50 pm
content: Hi everyone, I have a cheap Chinese USB microscope, and I need software that allows me to take measurements because the HiView software doesn't show the measurement option, and I haven't been able to find any.

author: Uunoctium
author_rank: Frequent Contributor
timestamp: August 08, 2025, 10:38:46 pm
content: You probably already know this.R&S Components (together with Distrelec, former known as Schuricht) also offers the same camera. In Distrelec's spec sheet you find an download link for appropriate software-packages. However, I don't know if any of listed is able to perform measurements:http://www.cameradownload.net/site/index?page=1(domain registered in CN; always recommended to upload any .exe file prior installing at virustotal)https://www.distrelec.de/en/digital-microscope-110x33x33mm-1920-1080-20-230x-usb-rs-pro-1964074/p/30391532
Owon XSA805-TG - Page 1
Forum section: electronics / testgear

author: pa3hfu
author_rank: Contributor
timestamp: July 16, 2025, 05:37:41 pm
content: Hi!I was wondering if an XSA805 from Owon can be upgraded to an 815. I now have up to 500 Mhz. It would be nice if this could be expanded to 1.5 Ghz.Thanks for answering!

author: pa3hfu
author_rank: Contributor
timestamp: August 08, 2025, 03:10:28 pm
content: I can now answer that myself: Owon provides an update file upon request that converts the 805 into an 815. So, with a range of up to 1.5 GHz.
VFO Frequency Counter Problem - Page 1
Forum section: electronics / testgear

author: ko4nrbs
author_rank: Regular Contributor
timestamp: August 05, 2025, 02:10:26 pm
content: I am using one of the cheap frequency counters off Amazon to check the frequency of my Heathkit HG-10B VFO. Works well above 80 meters but below about 3.900 mHz it only displays 160-meter frequencies. Looks like it gets confused since 160 and 80 meters are so close in frequency. What can I do to fix this?Bill

author: Grandchuck
author_rank: Super Contributor
timestamp: August 05, 2025, 02:33:03 pm
content: Does it work at audio frequencies?I suppose it could be an input coupling problem ... like a capacitor that is too small?Post a link to the counter.

author: ko4nrbs
author_rank: Regular Contributor
timestamp: August 05, 2025, 02:44:28 pm
content: This isn't the exact one, but it is similar.https://www.amazon.com/Frequency-Resistance-Brightness-Adjustable-to1000MHz/dp/B09RG54FJP/ref=sr_1_20?crid=2IPYJYYTBEI9D&dib=eyJ2IjoiMSJ9.l0xr0Z2LHJC3FiLVzARdPAeAqCyhrt4umZK71MOGe7IqWLGj82alBWNP9WgFmKJFXleonEy0dniAatIo-3SNoV60VpE5gr-PWwPS9qQm8jHz1QVWA7ejbjMBto9teKnfPVj4pgZKoNHn-kR8yttxQ8Fuu8oq6o1FOroMMSoQDwK5q9OceSg0SotnGWxabx282sA5yvChnCI9Evm5W7JQ5t-73B316XOH_WqcyZc7xwg.EfEx7UxvMwP7nKqCGUmLq1xSt6f0-BKQIvDkIAqrNmI&dib_tag=se&keywords=frequency+counter&qid=1754404977&sprefix=%2Caps%2C81&sr=8-20Bill

author: Grandchuck
author_rank: Super Contributor
timestamp: August 05, 2025, 02:58:52 pm
content: OKIn the Question section it says: "Can it measure frequencies below 1MHz?No, this frequency counter is designed to measure frequencies in the range of 1MHz to 1000MHz."So I am guessing it was designed to replace or augment the linear dial in a ham transceiver?

author: coromonadalix
author_rank: Super Contributor
timestamp: August 05, 2025, 03:38:54 pm
content: the min specs on most sites are 100Khz not 1MHzdont know if this page help in some wayshttps://n5ese.com/freq_display_plj-6led.htmhttp://land-boards.com/blwiki/index.php?title=Frequency_Counter_6_Digits

author: TimFox
author_rank: Super Contributor
timestamp: August 05, 2025, 04:05:18 pm
content: Obviously, 160 m and 80 m frequencies are a factor of 2 apart, which should not be a problem for a counter.However, an input high-pass filter, as suggested above, could reduce the sensitivity at 160 m, but you are probably seeing double-triggering due to some defect at the input which generates twice the actual frequency at the counter itself.

author: 807
author_rank: Frequent Contributor
timestamp: August 08, 2025, 02:44:40 pm
content: Quote from: TimFox on August 05, 2025, 04:05:18 pmMy understanding of the first post, is that the counter is reading half of what it should, rather than double, at frequencies below 3.9MHz. Quote"...but below about 3.900 mHz it only displays 160-meter frequencies"@ko4nrbsAre you saying that below 3.9MHz it displaysexactlyhalf of what it should do? e.g. with the HG-10 at 3.8MHz, it displays 1.9MHz, but at 4MHz it displays correctly?
Looking for External Multiplexer/Scanner Module for Keysight 34470A - Page 1
Forum section: electronics / testgear

author: strahd_von_zarovich
author_rank: Contributor
timestamp: August 08, 2025, 09:19:20 am
content: Hi everyone,I am looking for a switching unit (multiplexer or scanner module) that I can use with my Keysight 34470A digital multimeter to automatically switch between multiple measurement points in a test automation setup.The signals I need to measure range from 100 mV up to 14 V (DC) and from 1 mA to 100 mA. Low thermal EMF and low-noise performance are important for my application.I am aware that some DMMs have dedicated scanner cards, but the 34470A does not. I would therefore appreciate recommendations for an external low-noise switching unit or multiplexer that can interface with this DMM.If you have experience using such a setup, I’d be grateful for any suggestions or product references.Thanks in advance.

author: voltsandjolts
author_rank: Unknown
timestamp: August 08, 2025, 10:13:29 am
content: Some info...https://www.eevblog.com/forum/projects/diy-low-thermal-emf-switchscanner-for-comparisons-of-voltage-and-resistor-stand/https://www.eevblog.com/forum/metrology/scannermultiplexers-for-voltage-references/https://www.eevblog.com/forum/metrology/measurements-on-emf-error-of-switches/
Oscilloscopio FNIRSI 1014D - Page 1
Forum section: electronics / testgear

author: Anna Maria
author_rank: Newbie
timestamp: August 07, 2025, 03:19:17 pm
content: Buongiorno, ho un oscilloscopio FNIRSI-1014D, non si riusciva più a vedere la forma d'onda, allora ho scaricato il firmware "FSI-1014.bin", l'oscilloscopio ora va bene, unico problema è che la visualizzazione del display non è centrata è spostata di alcuni millimetri a destra e verso il basso, perdendo la visualizzazione di dati, come posso fare?Penso anche che il problema possa essere collegato alla versione del Firmware, come posso scaricare una versione precedente all'ultima uscita e provare se riesco a risolvere.

author: tunk
author_rank: Super Contributor
timestamp: August 07, 2025, 03:22:25 pm
content: As advised in your other thread, this is an English forum.Maybe you could use one of the online translation sites?And please don't double post.

author: Anna Maria
author_rank: Newbie
timestamp: August 07, 2025, 03:25:29 pm
content: OK sorry I didn't know you could only post in English

author: Anna Maria
author_rank: Newbie
timestamp: August 08, 2025, 08:47:13 am
content: PROBLEM SOLVED I downloaded the two firmwares from the FNIRSTI website, "FSI-1014.bin" and "FSI-1014.2.bin". With the first, "FSI-1014.bin", the firmware installation starts regularly, with the second, "FSI-1014.2.bin", the firmware installation does not start, but the problem I described still remains, that is, that the display is not centered, it is moved a few millimeters to the right and down. Then I had an illumination, I renamed the file "FSI-1014.2.bin" to "FSI-1014.bin", that is, I removed the 2nd, I installed it and everything went OK, the display is now centered.
Tek 2465B DMM issue - Page 1
Forum section: electronics / testgear

author: Julio Cesar Molina
author_rank: Newbie
timestamp: August 08, 2025, 05:24:21 am
content: Hi. The DMM of my Tek 2465B is displayed on the screen, I select different functions with the keyboard, and this is shown on the oscilloscope screen. But when I want to take a measurement, the values do not show up for any function. What could be the problem?

author: calibrationfixture
author_rank: Regular Contributor
timestamp: August 08, 2025, 06:27:35 am
content: Hi Julio Cesar Molina,Thus No Error Codes during Start-Up? You can execute additional Test Routines. Most DM Test Routines (DM TEST 71-75) aren't executed during Start-Up. Only DM TEST 76.Success,Calibrationfixture
Anritsu MD8475B call simulation scripts and other questions - Page 1
Forum section: electronics / testgear

author: itsmescotty
author_rank: Newbie
timestamp: August 10, 2025, 04:06:15 am
content: My 8475b only came with a single very specific test simulation script. Does any who ones one care to share any of their test scripts? Ideally all I want to do is connect a 2G 1900 Nokia or Ericsson and connect to a WAP server.Any other documentation or simulator creation software would be welcome !Has anyone made an image of the HDD in this thing? It appears east to get to, so I may make an a backup just in case.I also have the old R&S and an HP, both which work perfectly on 2G.Any finally, any tips on a good antenna coupler? We used to have shielded R&S one at work, but that is beyond my budget.Thanks!
Oscilloscopio FNIRSI 1014D - Page 1
Forum section: electronics / testgear

author: Anna Maria
author_rank: Newbie
timestamp: August 07, 2025, 02:30:17 pm
content: Buongiorno, ho un oscilloscopio FNIRSI-1014D, non si riusciva più a vedere la forma d'onda, allora ho scaricato il firmware "FSI-1014.bin", l'oscilloscopio ora va bene, unico problema è che la visualizzazione del display non è centrata è spostata di alcuni millimetri a destra e verso il basso, perdendo la visualizzazione di dati, come posso fare?Penso anche che il problema possa essere collegato alla versione del Firmware, come posso scaricare una versione precedente all'ultima uscita e provare se riesco a risolvere.

author: Aldo22
author_rank: Super Contributor
timestamp: August 07, 2025, 02:44:13 pm
content: CiaoQuesto è un forum in lingua inglese.Il thread principale relativo al tuo oscilloscopio si trova qui:https://www.eevblog.com/forum/testgear/new-bench-scope-fnirsi-1014d-7-1gsas/Ti preghiamo di scrivere in inglese. Sono disponibili traduttori online:https://www.deepl.com/de/translatorhttps://translate.google.com/

author: Simon
author_rank: Unknown
timestamp: August 07, 2025, 05:49:19 pm
content: We also ask that you do not create multiple threads, it just annoys people.
Micsig STO1104C battery - not dead, just unbalanced - Page 1
Forum section: electronics / testgear

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 06, 2025, 06:53:40 pm
content: My STO1104C was getting very poor battery life, about half an hour.I pulled the battery apart - not easy, needed a bandsaw, and found that the two cells were badly out of balance - from memory about 3.5 vs. 4.1vIt has a 2-cell monitor circuit ( Hycon HY2120) , but no sign of any active balancing. I suspect the monitor circuit was cutting off from the lower cell voltage.I manually charged the low cell, and it's now back to running for about 4.5 hours on a full chargeUnfortunately the battery mid-point connection is not accessible on the multiway connector.In case anyone else sees this issue, you can get access to the mid-point by drilling a small hole in the end as shown. Case is 3mm thick, then a 3mm gap to the PCB so not too risky!

author: danno_cj
author_rank: Contributor
timestamp: August 06, 2025, 09:28:11 pm
content: The reason why the battery pack came unbalanced is the internal resistance different for the two cells. Manual balancing the cells solve the problem for a while but l believe the problem will come back unless a proper fix is done. Solutions are: balancing circuit (pasive or active) and/or equally matching cells.Additional commentsIf you have space inside of battery pack to install this module and you are ready to do DIY work then you can have balanced cells every time when charging is done outside of oscilloscope.This charger module is based on IP2326 can charge and balance 2 cells. I tested with 0.3V voltage differences and when charging ended the difference between cells was 20mV. Dimensions 32x19x5 mm