hybridfree/eevblog-posts huggingface dataset:
How do I decode 3 wire, 7 bit SPI on an MSO5000 ? - Page 1
Forum section: electronics / testgear

author: LinuxGuy123
author_rank: Regular Contributor
timestamp: January 24, 2025, 12:17:34 am
content: I'm reverse engineering (troubleshooting) an odd ball circuit. The communication busI am looking at is 3 wire SPI, ie half duplex and the data is 7 bits, not 8.The communication circuit has 3 wires: clock, data and chip select. There are 2 node: master and slave. The master generates the clock and chip select. The master sends a series of 7 bit words with CS low, then puts it high so the slave can respond, on the same wire. How would one decode this on an MSO5000 ?I'm guessing that I am going to need to store the waveform for a communications even, download it to my PC and process it manually. Am I correct ?

author: thm_w
author_rank: Super Contributor
timestamp: January 24, 2025, 01:46:56 am
content: From theuser manual:Data Bits:QuoteDid you do that?

author: LinuxGuy123
author_rank: Regular Contributor
timestamp: January 24, 2025, 01:58:45 am
content: Nope. Thanks for the tip.I was wondering how to set the word length.

author: LinuxGuy123
author_rank: Regular Contributor
timestamp: January 24, 2025, 07:41:39 am
content: UpdateThe MSO5000 did very well on this task. I was blown away by how I could tailor the setup to exactly what I needed to see. Running the scope on my desktop via VNC was a game changer, though it would be nice if the display area on the desktop was bigger. All in all a very nice debugging session.
Gordak 902 Solder Tweezers and how to calibrate it - Page 1
Forum section: electronics / testgear

author: snoopy
author_rank: Frequent Contributor
timestamp: January 25, 2025, 12:44:04 am
content: I bought one of these from aliexpress delivered for about $90 AUD. Normally I use two irons but I wanted something more convenient where both irons were earthed at the same point for better ESD protection and only requiring one hand. Also, I didn't want to pay megabucks for a hakko or jbc etc.According to the online reviews, it is quite a good unit for the money but I have one issue. Even though there is a trim pot adjustment for temperature accessible on the front panel the temperature of both tips wasn't equal and off by about 40 degrees C. Lets open it up to see if I can improve this. There seem to be an additional two trimpots. Still, these aren't easily inaccessible even with the cover off and I think you have to literally unsolder the front connector to remove the front panel to get at them. I assume they are temperature adjustments for each tip but not sure. My plan is to unsolder them and mount them on the back of the board. Both trimpots seem to be connected to identical circuitry which then go to two different pins on a 16-pin DIL IC which could be a comparator chip of some kind. Maybe someone has a circuit of this ?

author: snoopy
author_rank: Frequent Contributor
timestamp: January 25, 2025, 05:35:43 am
content: So I made some progess. Bu shorting out these hidden trimpots I could see that each one was controlling one arm of the tweezers. Because the board is single sided it was going to be hard to flip the trimpots to the other side of the board so I just unsoldered the board from the connector and drilled two holes in the front panel to access the hidden trimpots and was able to fairly accurately match the temperatures of both irons. Hopefully, this helps someone else who has the same tweezers or thinking about buying a setup.
New Siglent SSA6000A analyzer range coming - Page 1
Forum section: electronics / testgear

author: tautech
author_rank: Super Contributor
timestamp: January 03, 2025, 02:46:29 am
content: SSA6000A10 Hz - 50 GHzMain featuresSpectrum analysis frequency range: 10 Hz - 50 GHzPhase noise is less than -123dBc/Hz@1GHz, 10kHz offsetDisplay average noise level DANL below -165 dBm/HzIQ analysis bandwidth 1.2 GHzReal-time spectrum analysis bandwidth 400 MHzDemodulation and analysis of 5G NR, LTE/LTE-A, WLAN and other multi-standard mobile communications, wireless connection and other signalsBasic Chinese datasheet:https://www.siglent.com/u_file/download/24_12_25/SSA6088A_Datasheet.pdfUnknown release date.Will update as more info becomes available.

author: 5U4GB
author_rank: Super Contributor
timestamp: January 04, 2025, 12:47:20 pm
content: Quote from: tautech on January 03, 2025, 02:46:29 amDoes it come with a pre-printed mortgage application form? :-).

author: purplxed
author_rank: Newbie
timestamp: January 23, 2025, 08:44:25 pm
content: I clicked on this thread expecting expensive shiny, and was not disappointed.

author: KungFuJosh
author_rank: Super Contributor
timestamp: January 23, 2025, 09:32:55 pm
content: https://www.siglent.com/products-video/ssa6000a/#navsThe R&S equivalent is what, $6,000,000 or something like that?

author: Martin72
author_rank: Super Contributor
timestamp: January 23, 2025, 10:13:04 pm
content: Quote from: purplxed on January 23, 2025, 08:44:25 pmFor me, it is another product from Siglent that underscores their claim to professionalism.Meanwhile, anyone who still puts them in the “B-brand” corner makes a fool of themselves.Nevertheless, Siglent has not forgotten their “less affluent” clientele, with the still available range of affordable measuring equipment, as well as their support, which is taken just as seriously as if you had bought the top-of-the-range model.Actually, that's A+.
bin file for base DHO814? - Page 1
Forum section: electronics / testgear

author: Hix
author_rank: Regular Contributor
timestamp: January 25, 2025, 11:38:50 am
content: Doesn anyone have an image of the base firmware for the DHO814? I have recently bought one and it has stopped booting. I have been told that my only option is to ship it back to CN at my expense [~£45]I have a feeling the µSD card may have corrupted somehow.I have tried flashing the img fromhttps://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/msg5072767/#msg5072767to no avail. I'm just wondering if a vanilla 814 firmware might just workI have the option to return the item, but that still leaves me with no scope and out of pocket, so I'd rather try to repair what I have presently.Any help gratefully received.Just for clarity, there isn't even a Rigol logo when you turn the unit on anymore.

author: Fungus
author_rank: Super Contributor
timestamp: January 25, 2025, 09:36:49 pm
content: Sounds like a hardware failure, in whuch case there's nothing you can do except check the power supply..And that's not going to change no matter how many new threads you start.
ECM 300 vtvm - Page 1
Forum section: electronics / testgear

author: martinj420
author_rank: Newbie
timestamp: January 23, 2025, 06:13:01 pm
content: Any of you guys really know vtvm's. This one does not use the typical bridge circuit but I cant figure out why when powered up on DC+ the needle pegs full left. 117l7 tube is good and resistors look fine.
Any repurpose of a conductivity measurement (µS/cm) device? - Page 1
Forum section: electronics / testgear

author: highcap
author_rank: Contributor
timestamp: December 22, 2024, 12:39:01 pm
content: Didn't know where to post, I hope the section is somewhat right.What I could use this measurement device for, is there any general re-purpose I can do to it?Thank you!

author: Poroit
author_rank: Frequent Contributor
timestamp: December 23, 2024, 06:10:40 am
content: G'day highcap,Do you have a probe that is associated with this instrument?

author: highcap
author_rank: Contributor
timestamp: January 23, 2025, 09:36:03 pm
content: Good day!I don't. I only got the instrument...
4156A Parametric Analyzer - Performance verification PV4155 software (Floppy) - Page 1
Forum section: electronics / testgear

author: tlong71
author_rank: Newbie
timestamp: June 27, 2017, 04:19:19 pm
content: I am looking to get my hands on the software to perform the performance verification on my HP 4156A's & 41501A expansion units. Would anyone have a copy of the software contained in the original floppy? Or know were I can get it?Regards;

author: chilternview
author_rank: Frequent Contributor
timestamp: August 30, 2023, 05:14:05 pm
content: Did you ever find a copy of the PV4155 disk? I'm looking for one also. It is part number 04155-65301, and comes with the 'product support package' 04155-65801.

author: Addie
author_rank: Newbie
timestamp: May 07, 2024, 07:22:03 am
content: Did anyone find this software?

author: chilternview
author_rank: Frequent Contributor
timestamp: May 07, 2024, 06:42:53 pm
content: No - no luck getting it from Keysight, they said it was no longer available. And they no longer service or calibrate the 4155/4156, but fortunately they are quite reliable.

author: moosebiscuit
author_rank: Contributor
timestamp: January 24, 2025, 03:21:03 pm
content: I understand this thread is being dug up, but I just wanted to say I'm in this same situation. Here's a message from Keysight's tech support:"There are a couple qualifiers upfront... the 4155A is an older instrument that was discontinued in the 1990s and reached the end of support in Jan 2003.04155-65801 is obsolete. There is one cross reference listed (04155-65841), also obsolete. FYI, 04155-65841 appears to have been a higher level "kit" that included cables, adapters, etc., but it also no longer orderable and has minimal info remaining... sorry, a function of this being out of support for some 20+ years."It's also worth noting that Keysight DOES still offer calibrations for these units.
Schaffner FN9223 mains filter - good or bad? - Page 1
Forum section: electronics / testgear

author: srb1954
author_rank: Super Contributor
timestamp: September 06, 2022, 03:05:38 am
content: I am looking at the Schaffner FN9223-3-06 mains filter in my newly acquired 3458A and I am wondering whether it is prone to the dramatic magic smoke release of earlier Schaffner mains filters and needs immediate replacement. I am reluctant to replace it if it is not necessary as the filter is riveted into the cabinet and there is limited working space around it.The build date of my 3458A is around 2005 and the filter date code appears to be 0432. Did Schaffner manage to finally sort out their exploding problems and produce a reliable mains filter by 2004?

author: matthuszagh
author_rank: Frequent Contributor
timestamp: January 23, 2025, 06:38:25 pm
content: I know this is an old post, but just commenting here in case it's still useful.I reached out to Schaffner in regard to this about 2 years ago. They (very helpfully) tracked down an employee that had been there well over 2 decades. He said "I do believe Schaffner was using paper caps back in the 80's. Maybe early 90's. But film caps are the norm now, except for small value Y caps (nF, pF) that are ceramic." From that, I'd say your 3458A is probably safe. However, if you are thinking of replacing it to be extra sure, I've done it and it's not too difficult. You can drill out the rivets (center punch them first). I then used a pair of metal snips to finish the job.Keysight now uses Schaffner FN9222-3-06 for this, so that's what I replaced it with. I used a flathead M3-10mm screw, a lock washer, and nut. There was no damage to the instrument in the process and the replacement looks like it belongs perfectly. I've used this instrument quite a bit since then and it works perfectly.
Tek 2465A Sweep Gets Compressed - Page 1
Forum section: electronics / testgear

author: dnowakowski
author_rank: Newbie
timestamp: January 22, 2025, 05:56:22 am
content: I have a relatively low serial number (B011xxx) Tek 2465A. After power has been off for a long time, at power-on the display is normal (left-side of picture). After a minute or so the horizontal sweep compresses as shown in the right-side of the picture. Pressing the Beam Finder compresses the display even more. I cleaned the Beam Finder switch, but the problem remains. Any suggestions as to where to start?Thank you.

author: D2236
author_rank: Regular Contributor
timestamp: January 22, 2025, 07:55:11 am
content: You should look at the service manual wave-form's before and after the horizontal output chip to see if anything changes when started from cold. You will need another working scope to do this.

author: squadchannel
author_rank: Frequent Contributor
timestamp: January 22, 2025, 09:07:31 am
content: 2221A, but I have experience with compression.In my case, I tested from the output (last transistor) of the horizontal deflection going to the CRT and replacing the second transistor fixed it.

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: January 22, 2025, 08:23:50 pm
content: If you have some freeze spray, try lightly spraying some of the horizontal components to see if they return to normal. From what you have said, this seems to be a textbook case of heat from a unit warming up changing how it operates. Spraying the faulty component with freeze spray will reveal the bad component.Warning!!!:Make sure you are pointing a fan at the whole unit all the time whenever operating it without its case! The hybrid chips in 24xx series scopes tend to overheat! Even a fan simply blowing at them is not enough. You will have to be careful not to cook the hybrids.

author: tggzzz
author_rank: Super Contributor
timestamp: January 22, 2025, 08:57:08 pm
content: Quote from: dnowakowski on January 22, 2025, 05:56:22 aminThat's not a 2465, it is a 2465A, and there are significant differences. I suggest you change the thread title before you get many irrelevant suggestions.Start with the service manual.Check the PSU voltages and ripples preferably before.and after the problem is visible.Visually inspect the infamous RIFA capacitors before they demonstrate their existence.Visually check SMD capacitors on the A5 board, if any.Thereafter you can start the interesting faultfinding.
Fluke 233 or cheaper Alternatives - Page 1
Forum section: electronics / testgear

author: Martin72
author_rank: Super Contributor
timestamp: December 14, 2024, 10:30:26 pm
content: Hi,I am in a situation in the test field where I would have to measure a voltage a little further away from the source, but at the source I can only set the voltage there, i.e. no remote control is possible.The distance is just under 10m, so it's right at the limit of the Fluke 233.What are the experiences with the Fluke, does the remote transmission work reliably, is it prone to interference?And:Are there any cheaper alternatives to the Fluke?I know that there are Bluetooth devices, but I think that they will have problems with the distance.As always, thanks for any response/idea/recommendation.Martin

author: danno_cj
author_rank: Contributor
timestamp: December 14, 2024, 11:05:30 pm
content: Bluetooth dmm and two phones with AnyDesk you could be on the other side of the planet. But first try with with one phone, maybe is sufficient to cover your needs.Later added:I played a bit with my clamp meter Owon CM2100B that has Bluetooth connection. In my home I was able to stay in contact with the meter even I was in a different room and with door closed. The Bluetooth issues that you mentioned can be related to a noisy RF environment and with a particular device. To further increase the distance you can use a tablet with bigger screen. With my 6" screen phone I was able to readout the numbers from 4 meters away. Another feature that Owon app has that can help you is the "Voice Broadcast" that will read in English the numbers. Of course this is useful only in quiet area, if are noisy equipment nearby this feature will not help you.You may also use a regular multimeter with two phone and video calls app.

author: BeBuLamar
author_rank: Super Contributor
timestamp: December 15, 2024, 10:51:23 am
content: I used the 233 at work (I no longer work there so I can't test it any more) but never used it at 10m. Didn't have problem when the meter is inside a steel cabinet.

author: Martin72
author_rank: Super Contributor
timestamp: January 21, 2025, 10:10:16 pm
content: Update:We have been using the Fluke 233 for two weeks and it does exactly what I had in mind.It doesn't quite make the 10m, but for what I wanted it for, it serves its purpose.
Need schematic for audio oscillator - Page 1
Forum section: electronics / testgear

author: diode5
author_rank: Newbie
timestamp: January 21, 2025, 10:15:35 pm
content: Hi,I have an audio oscillator dated about 1962. Its a Waveforms model 512F.I've been trying to find the schematic online but no luck (incl Sam's). Found a manual for model 510, but the internal design is quite different.Below is a snapshot from the mfr's catalog:If you could help with this id be very grateful,thanksmitch
Phase Noise Measurement - Page 1
Forum section: electronics / testgear

author: ZGoode
author_rank: Frequent Contributor
timestamp: January 21, 2025, 05:28:37 pm
content: I was looking into different options for measuring phase noise of some oscillators and standards I have under test and came across the HP 3048A. Now I do not have one set up, but it does look like I technically have half of it (a 3563A). It officially came with the 3561A, but the 3563A and 3562A are incredibly similar to that. Will the software support the 3562A or 3563A, or does it absolutely have to be the 3561A. I did see I will probably have to occur the phase noise test fixture as well as an 8662A or 8663A, but that is a later problem. Should I look into the finding the other half of the 3048A (11848A fixture), or is there a different method/piece of equipment I should look into?I would love to hear some thoughts from other people who have experience here or have gone down a similar rabbithole
TinySA Ultra stuck in Listen mode on startup - Page 1
Forum section: electronics / testgear

author: szoftveres
author_rank: Regular Contributor
timestamp: January 22, 2025, 07:03:09 am
content: I once turned off my TinySA ultra in Listen mode - now it starts up in this mode by default every time; I have to manually set it to normal display mode at each startup.Is there a way to reset this behaviour to factory default (i.e. start up in normal display mode), without deleting the factory calibration data?
YR1035+, HRM-10 and YR2050 Low R Comparisons - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: January 21, 2025, 06:50:22 pm
content: Having evaluated the YR1035+ and HRM-10 here, our curiosity got the best of us (always does, see signature below)https://www.eevblog.com/forum/testgear/any-more-in-depth-info-on-the-yr1035-battery-tester-milliohm-meter/msg5787163/#msg5787163So now we've included the YR2050 dedicated Milliohm Meter. The HRM-10 and YR1035+ are Battery Test Meters that perform the Resistance measurement with an AC waveform at ~1KHz, while the YR2050 uses DC like DMMs. All use a much higher level DUT test current than a typical DMM, like our Bench LCR meters, however the YR2050 uses up to 100ma DC test current which is higher than our LCR Meters which use for DCR measurements, with max of ~10ma.The HRM-10 last digit was often questionable in most measurements, so the "apparent" extra resolution needs consideration.All measurements with supplied Kelvin Clips, use DMM6500 as reference value (4 NPLC, Line Sync, Offset Comp Auto).BTW we really like the coaxial Kelvin type probe leads you can get for the YR1035+. Evidently they don't offer them for the YR2050 which utilizes an old USB connector type, but a pair of USB connectors came with the YR2050, so hinting you can make your own. We also created a Banana Adapter for the HRM-10 connector GX12 type and the YR1035 Connector XS10 type to be able to use the coaxial Kelvin probes (and others) with our DMMs which have 4 Banana type connectors, see link above.Anyway, these economical (can't call them cheap which infers sloppy, minimalist design and build, which they are not!!) meters perform quite well indeed for low resistance measurements.Best
Rigol MSO5000 waveform generator burst trigger - Page 1
Forum section: electronics / testgear

author: eb4fbz
author_rank: Regular Contributor
timestamp: January 20, 2025, 08:56:04 am
content: Few days ago, I was thinking about playing with fault injection on a cheap STM8 microcontroller and thought it could be possible to use the MSO5000 itself as both trigger and fault generator at the same time.I never used that, but I knew it was capable of generating bursts triggered by an internal or external trigger event, with a configurable delay, exactly what you need for fault injection!But yesterday, I tried to use that feature, and found it doesn't work as expected. First, burst mode is only available with AWG, so you need to create a custom waveform: OK, that's easy. But then I found that the internal trigger source doesn't work as I expected. If you set the trigger source to internal, it plays the waveform continuously, no matter what number of cycles you select. If you set the burst trigger to external, it works as expected, but you need to push the button so it's useless for this purpose.I checked the manual and it kind of explain the behavior I'm experiencing, but the fact that they name that "internal trigger" is confusing.

author: NE666
author_rank: Frequent Contributor
timestamp: January 20, 2025, 09:08:43 am
content: It's termed "Internal", since it is the scope's internal 10Mhz reference clock signal, or a derivative thereof, that is being used as the trigger event.Hence it is working as expected - your burst is being continually retriggered, as the internal clock is continuous. A single, N-cycle burst (which it seems you are expecting) can be achieved only via a single trigger event. Rigol's DG800/900 Pro waveform generators work in the same way.The behaviour is analogous to the difference between 'Single' and 'Auto' triggering modes for the scope itself.
Uni-T MSO2304X teardown - Page 1
Forum section: electronics / testgear

author: iMo
author_rank: Super Contributor
timestamp: January 05, 2025, 12:31:01 pm
content: FYI

author: iMo
author_rank: Super Contributor
timestamp: January 09, 2025, 10:54:57 am
content: .. and the follow-up..

author: iMo
author_rank: Super Contributor
timestamp: January 19, 2025, 09:11:03 am
content: .. 3054X teardown..
are SDG1000X Plus series generators hackable? - Page 1
Forum section: electronics / testgear

author: omar9000
author_rank: Newbie
timestamp: January 17, 2025, 08:36:17 pm
content: I hope I don't get flamed for asking as I've searched and come up empty. But: are the Siglent SDG 1000X Plus signal generators hackable?I've turned up a few threads on them but none address liberating features. And searching is arduous, since searching specifically for the new "Plus" models isn't so selective.

author: tautech
author_rank: Super Contributor
timestamp: January 17, 2025, 09:13:12 pm
content: Apparently they can be 'modified'.https://www.eevblog.com/forum/testgear/testing-the-new-siglent-sdg1022x-plus-output-100mhz!!/msg5745501/#msg5745501

author: omar9000
author_rank: Newbie
timestamp: January 18, 2025, 02:47:42 pm
content: Quote from: tautech on January 17, 2025, 09:13:12 pmThanks! That's one of the few PLUS-specific threads I found, but I don't see a clear answer there -- and certainly not in that specific post. What am I msising?

author: tautech
author_rank: Super Contributor
timestamp: January 18, 2025, 06:47:15 pm
content: Looked a bit harder for you:https://www.eevblog.com/forum/testgear/is-there-a-better-buy-than-the-siglent-sdm3055-in-this-price-range/msg5781819/#msg5781819

author: Kean
author_rank: Unknown
timestamp: January 19, 2025, 06:00:37 am
content: Also seehttps://www.eevblog.com/forum/testgear/unified-keygen-script-for-siglent/msg5610581/#msg5610581
Leader Swemar Generator LSW-450A - Page 1
Forum section: electronics / testgear

author: max.wwwang
author_rank: Frequent Contributor
timestamp: January 13, 2025, 07:58:39 am
content: Dug this out from dust in a corner of the garage. Heavily rusted. Turns on but no further tests undertaken. My knowledge about it is limited to what Dr Google told me with a quick search. Any point in salvaging/restoring it?Also did a search of its manual. Found those of similar models but not exactly this one.

author: max.wwwang
author_rank: Frequent Contributor
timestamp: January 18, 2025, 04:34:27 am
content: Anyways, I’m restoring it. Internal rust is more difficult to deal with given the much less regular surfaces. Repair is also probably needed.

author: max.wwwang
author_rank: Frequent Contributor
timestamp: January 18, 2025, 04:35:36 am
content: Attachment size is limited.
The difference between Tek TDS1012C and TBS1102 - Page 1
Forum section: electronics / testgear

author: clarkzh
author_rank: Newbie
timestamp: January 18, 2025, 01:52:36 am
content: I used a Tektronix TBS1102 at work.the TBS1102 fwas significantly lighter, making it easier to carry. In this case, the absence of noise became even more important because the fan noise from Rigol oscilloscopes could sometimes be irritating and distracting.Recently, as I’ve been working on microcontroller projects, I bought a TDS1012C for personal use, as well as a TDS1012B. The reason I bought two is that I enjoy collecting these entry-level oscilloscopes. I like tinkering with them, and I plan to purchase a TBS1102 later.I’ve compared the TDS and TBS series. First, the TBS1000 series was released after the TDS1000 series, although the two were produced concurrently for some time. The specifications of the two series are entirely identical, and even their appearance is so similar that they can only be quickly distinguished by their names. It’s said that Tektronix upgraded the internal circuitry in the TBS series, but in actual use, I don’t notice any functional differences between the two.However, there are two noticeable differences in their appearance. First, the TDS series uses brass hooks, while the TBS series seems to use stainless steel. Second, the small knobs on the TDS series have a stronger damping feel, while those on the TBS series are looser and less tactile. The feel of the TDS knobs is superior.Based on these two points, I personally believe the TBS series is a cost-reduced and downgraded version of the TDS series, especially since product prices have been steadily decreasing.interestingly, TBS1104 is slightly cooler than TDS1012c, as the power board of TBS1000 is with less heatsink.am I right, please correct me.
SinnoRally TEM cell SR_TEM_CL002 - Page 1
Forum section: electronics / testgear

author: dexar
author_rank: Contributor
timestamp: September 19, 2024, 06:32:00 am
content: Happened by accident to stumble over a cheap TEM cell on aliexpress:https://www.aliexpress.com/item/1005005446525932.html#nav-specificationIt seems to be made of 3d printed parts. Note that the company name that is printed on it is "SinoRally" but the store is called "SinnoRally" with two n.This makes me wonder how good it is but at a price of $260 it is sure tempting.Has anybody tried it or seen it in the wild?

author: MichalPL
author_rank: Contributor
timestamp: January 16, 2025, 01:41:01 pm
content: Hi! Have you tried it? Does it work as intended?

author: dexar
author_rank: Contributor
timestamp: January 17, 2025, 05:08:01 pm
content: I never bought it since I thought it was a little bit to expensive for what you get. I was also skeptical about the quality. I chose to built one myself instead.
How to install Linux-GPIB on actual Debain 12 - Page 1
Forum section: electronics / testgear

author: Chefbastler
author_rank: Newbie
timestamp: July 04, 2024, 07:19:32 pm
content: Hallo,I have an new installed computer with actual Debain-12 and a NI GPIB-PCI Card in it.However, Linux-GPIB 4.3.6 cannot be installed correctly for it to workCalling gpib_config gives no feedback.Calling ibtest gives "failed to open board" error when trying to open from interface boardCode:lsmod | grep gpibgpib_common 53248 2 tnt4882,nec7210Code:interface {minor = 0board_type = "ni_pci"name = "gpib0"pad = 0sad = 0master = yeseos = 0x0aset-reos = noset-bin = noset-xeos = yesset-eot = yesdefault-timeout = T3sdefault-dma = 0default-signal = 0default-rsv = 0}Can someone help me?

author: mendip_discovery
author_rank: Super Contributor
timestamp: July 04, 2024, 07:42:02 pm
content: I'm no expert so I used this,https://github.com/PhilippCo/meas_rpiMight give you some ideas.The user who wrote it in here, seehttps://www.eevblog.com/forum/metrology/raspberry-pi23-logging-platform-for-voltnuts/msg2008349/#msg2008349

author: guenthert
author_rank: Frequent Contributor
timestamp: January 17, 2025, 11:26:30 am
content: Quote from: Chefbastler on July 04, 2024, 07:19:32 pmThat's a bold claim.Quote from: Chefbastler on July 04, 2024, 07:19:32 pmWell, therewillbe a return code. I don't expect any other 'feedback'.Quote from: Chefbastler on July 04, 2024, 07:19:32 pmWell, showing us the actual dialogue (what was requested, what was reported) just might be helpful here.Quote from: Chefbastler on July 04, 2024, 07:19:32 pmThat looks peachy.Quote from: Chefbastler on July 04, 2024, 07:19:32 pmGenerally, I'd think the support channel for a given piece of software (here the linux-gpib-generall mailing list  as stated on its home page ) is a surer bet to get help, but if you provide the info requested above, we might be able to help you too.https://sourceforge.net/p/linux-gpib/mailman/linux-gpib-general/?style=threadedhttps://linux-gpib.sourceforge.io/
NanoVNA purchase - Page 1
Forum section: electronics / testgear

author: cipi65
author_rank: Newbie
timestamp: January 18, 2025, 07:11:54 am
content: Hi,I would like to purchase a NanoVNA, and I am leaning towards the NanoVNA F-V3 from OpenSource SDRLab. I would like to know if anyone has bought from this seller before and if the product is okay. I am also interested in the hardware included in this model and whether there is support for potential firmware updates.
Electronic load with no user interface - Page 1
Forum section: electronics / testgear

author: Golana
author_rank: Newbie
timestamp: January 15, 2025, 09:05:55 pm
content: I asked this already in a different channel but didn't get much for replies. Maybe this is a better channel to ask.Does anyone know of any companies other than AstrodyneTDI that make electronic loads that are meant to go inside of a product and not be user accessible? Astrodyne has one part that I can find and it is model SDL1040A. I'm not sure if you can even buy it and it doesn't hit the voltage range I want (450V+). It is rated for 1500W which is about what I'm looking for.I want something that only has a remote control interface (serial, Ethernet, USB, etc...) and no user interface or displays. For context the product being built is an industrial battery charger/discharger and this would be used to discharge the battery and would go in an enclosure with the rest of the system.

author: todd_fuller
author_rank: Contributor
timestamp: January 15, 2025, 09:59:09 pm
content: Aliexpress has a some modules like this under the SOUSIM brand. Up to 500W with RS-485 interface. Finding all the documentation and/or example script is a challenge though.https://www.aliexpress.us/item/3256803977667820.htmlhttps://www.aliexpress.com/i/3256801915587609.html

author: Golana
author_rank: Newbie
timestamp: January 16, 2025, 03:33:13 pm
content: Quote from: todd_fuller on January 15, 2025, 09:59:09 pmThank you for responding. This is the type of thing I'm looking for. The only downside is that it is from a questionable source and I can't design it into a product that I need to manufacture for the next 10+ years. I'm kind of surprised that this isn't a product that is readily available from a reputable source. I guess all of these chargers with built in dischargers are just designing their own loads? I could do that but I'd rather not since that will take a lot of engineering effort and my volumes probably don't justify it.
Old METRIX MX720 - Page 1
Forum section: electronics / testgear

author: Oliv_Bricol-2
author_rank: Contributor
timestamp: January 14, 2025, 01:08:52 pm
content: Hello everyone,I read that some people like old devices.I wanted to create a topic on my old Métrix MX720, but if there already is a post on it, here is the link.https://www.doctsf.com/metrix-mx-720-a/f47104my device no longer works, the display remains blocked and no longer reacts.if you have an idea or know, I do not master this technology.

author: coromonadalix
author_rank: Super Contributor
timestamp: January 14, 2025, 01:14:54 pm
content: check all ic's markings, find their datasheet for the supply voltage(s), try to understand how it works, you have basic workings in the documenthere : click on the image the manual w schematics will downloadask Chauvin Arnoux aka Metrix if it is availablemanual attached hereyou have at least 4 voltages to verify -25v -14v -5v +11v

author: Oliv_Bricol-2
author_rank: Contributor
timestamp: January 15, 2025, 09:05:59 am
content: Thank you, unfortunately some references cannot be found, I do not know the real function of certain circuits. there is automatic switching, nothing life, the device shows 0.000, on all functions.
Bought CMU 200 and the problems were surprisingly easy fixed - Page 1
Forum section: electronics / testgear

author: KB4RU
author_rank: Newbie
timestamp: January 15, 2025, 05:42:23 pm
content: Bought a used CMU 200 listed on eBay for parts. Had the attached error, did a complete tear down and reassembly to find a loose connector to the RF front end. Made sure all connections were good and reassembled, then I could finally get it to boot up.Next issue- nonvolatile ram without power or empty. Replaced CMOS battery verified 3.6v, error persisted. Turns out someone else poked around in the front module and put the ram in the wrong slot. Moved it to the other slot, error went away. I saw several people mentioning this problem, but don’t think I found anyone mention a solution. Hopefully this helps someone else.Attempted to put SSD drive in, but my computers aren’t registering the Kingspec SSD. They are simply a mSATA to IDE adapter with an mSATA SSD drive preinstalled. I replaced the mSATA and found it still doesn’t work, so I suspect the adapter plate is bad. I have a IDE to CF card adapter and another mSATA IDE adapter coming today along with 2 new sticks of RAM. If it all works, I’ll post up the compatible parts for my setup and results. I haven’t found many videos or walkthroughs on using these for radio alignments. I have a Yaesu 767gx that i recently finished recapping and it hasn’t been aligned in 30 years. So, I’ll be realigning that and checking everything on my 706miig as well.I am new at this and learning, but hopefully, I can share what I have learned and what I have done to help the next guy or hear points and perspectives from this community.
Fnirsi 2C53T reset? - Page 1
Forum section: electronics / testgear

author: Giggabitten
author_rank: Newbie
timestamp: January 14, 2025, 04:31:08 pm
content: I just received a Fnirsi 2C53T which I ordered directly from Fnirsi. When I first booted it up I mistakenly selected the Chinese language option and I can't seem to get back to the main settings page in order to try to select English again. The manual shows a "Restoration" port, but there must be some type of secret handshake involved with using it as there's no mention in the manual concerning its use.Has anyone found a solution for this?

author: Giggabitten
author_rank: Newbie
timestamp: January 14, 2025, 05:36:08 pm
content: Resolved!There was no need to reset the meter. I was able to figure out which page was for the settings (in spite of all the Chinese!) and was able to select English.Though the English option is beneath the Chinese option, the right arrow selects it rather than the down arrow - go figure!Looking forward to testing this mater after an embarrassing start!
Anything particularly special about leakage clamps? Cheaper options? - Page 1
Forum section: electronics / testgear

author: Aarepairs001@gmail.com
author_rank: Newbie
timestamp: January 12, 2025, 04:11:49 pm
content: Needing to purchase an Earth leakage clamp. These seem to be expensive purchases, I wonder if the UNI-T UT210E would do the job? Specs state 0.001A for AC currents.Also had a look at Winapex 268b from the east which is probably where I'll go if the UT210E isn't suitable.Anything else to look out for? Open to suggestions. Thank you for the input.

author: Kean
author_rank: Unknown
timestamp: January 12, 2025, 05:05:39 pm
content: Take a look at Uni-T UT251A Precision Clamp-on Leakage Current Meter. It has measurement ranges up to 60A and goes down to 1uA resolution on lowest range.UT251B may also be an option, with up to 300A and 10uA resolution, but the A model is usually more appropriate. Note these are only intended for measuring AC currents.Leakage currents would usually be 1-2 mA max (depending on what you are working with), and tolerances of the meters are +/-1.5%+5dgt (UT251 series) or +/-3%+10dgt (UT210 series).Thus the UT251C and UT210E resolutions are not really ideal mainly because of that 5 or 10dgt/counts in the tolerance.

author: Aarepairs001@gmail.com
author_rank: Newbie
timestamp: January 13, 2025, 10:49:35 am
content: Thank you for the advice. If I understand then it's more about precision down low capabilities.I found this locally which has a uA setting. Would this do the job while learning?Clamp multimeter LUTRON CM-9930 -https://www.old.micronix.cz/data/cz/att/003/357-5086.PDFLooks like a copy of REED R5060 2000A True RMS AC/DC Clamp Meter -https://www.reedinstruments.com/pdfs/cache/www.reedinstruments.com/r5060/datasheet/r5060-datasheet.pdfThese seem to do uA measurements accurately, but I notice that the probes has a uA plug. From my limited knowledge one cannot messure leakage currents via probes. Apologies if the questions are a little daft.

author: danno_cj
author_rank: Contributor
timestamp: January 13, 2025, 12:14:04 pm
content: Is not for you. On clam meter mode the lowest resolution is 0.1 A. With probe the resolution is much better but probably you want to avoid cutting the wire to do measurements with probe and just use the clamp meter way.

author: Aarepairs001@gmail.com
author_rank: Newbie
timestamp: January 13, 2025, 04:00:47 pm
content: Thanks for the advice guys... And the patience.I've found a clone of the Uni-T UT251A, the ETCR6300 at half the price delivered.https://www.etcr-instruments.com/Upload/ET-PDF/ETCR6300%20Catalog.pdfTried to find a multi-purpose meter but it seems to achieve 0.000mA it will have to be. All my tools are hammers, except my screwdriver, that's a chisel.

author: Kean
author_rank: Unknown
timestamp: January 13, 2025, 08:27:55 pm
content: Yeah, the Lutron can not measure the lower currents via the clamp, only direct measurement via the banana jacks. You could make up a "special" extension lead for that though with safety banana plugs on a split earth.If you can get it cheaper then the ETCR6300 seems fine, and I expect it will be basically the same as the UT251A.
Hantek DS02D15 problems after software update to level 20240507  - Page 1
Forum section: electronics / testgear

author: DariusTwo
author_rank: Newbie
timestamp: January 13, 2025, 10:41:23 am
content: Hello,I have a Hantek DS02D15 scope which I updated from software level 20221208 to software level 24032501. The firmware level is 3209.Please note:1: The Hantek DS02D15 scope uses two software modules one is called Software and the other one is called Firmware.2: They have separate releases and identification.3: The software level has an identification with a date in it, like 240325.4: The firmware level is identified with four numerical digits, like 3209.After this update I encountered a serious problem with the second channel.The problem is as follows, with no input on channel 2:When the cursor of the second channel (the small green indicator on the left site of the screen) is in the middle position of the screen, the green line on the screen is also in the middle position.When you move the position of the cursor upwards from the middle of the screen, the green line of channel 2 moves downwards on the screen (please note: there is no input on channel 2)When you move the position of the cursor downwards from the middle of the screen, the green line of channel 2 moves upwards on the screen (again, there is no input on channel 2)I tried everything: going back to the previous software and firmware levels, calibration but that gave error 511D1, reset.If anybody has any clou, please let me know

author: pcprogrammer
author_rank: Super Contributor
timestamp: January 13, 2025, 10:48:04 am
content: Hi DariusTwo,Welcome to the forum.See the posts starting from here:https://www.eevblog.com/forum/testgear/hantek-dso2x1x-models-master-thread/msg5777211/#msg5777211That thread is about updating the scope and holds a lot of information about it, including why you are having problems.There is something about the Firmware in relation to hardware and it should not be wrongly used. Believe it has to do with the FPGA configuration.

author: DariusTwo
author_rank: Newbie
timestamp: January 13, 2025, 02:53:17 pm
content: Dear All,With the aid of the people on this forum I found the problem, many thanks. It seems that the firmware from older Hantek DS02D15 scopes can not be upgraded beyond level 3102. They can not be upgraded to level 32XX firmware. Be aware that there are three types of files: only Software, only Firmware and combined files software and firmware together. And that if you take de combined files it will upgrade both, the software and the firmware on your scope. To correct the problem I installed the software only file level 240326 and the firmware only file level 3102. The scope is now working fine.
HP/Agilent 14761A Harmonic and Flicker Emissions Tests siftware - Page 1
Forum section: electronics / testgear

author: piotekp90
author_rank: Contributor
timestamp: April 05, 2019, 11:13:16 am
content: Has anybody the 14761A Harmonic and Flicker Emissions Tests software for 6800 AC series power supply from HP/Agilent (especially 6812B)?

author: gdelucia
author_rank: Newbie
timestamp: January 12, 2025, 10:34:56 pm
content: Hi, i am searching for the same software too.Did yo u manage t find it? If you have, sharing would be highly appreciated..Gian
Rigol DS1104Z Plus does not boot, just blinks and beeps - Page 1
Forum section: electronics / testgear

author: Fabian
author_rank: Contributor
timestamp: March 05, 2024, 01:32:47 pm
content: Hi,I am sitting in front of multiple new DS1104Z Plus. When I turn them on, all they do is show me the Rigol logo, all buttons are blinking and it beeps in sync with the buttons turning on and off.Has anyone ever seen this? Is there a way around this? Is it possible to flash/update the firmware without getting the scope booted?Best,Fabian

author: Fabian
author_rank: Contributor
timestamp: March 06, 2024, 10:25:38 am
content: I got all of them fixed by updating the firmware. This can be done by putting the firmware file onto a fat32 usb drive, insert it into the scope, turn the scope on and continuously hit the Help button until the Single button lights up. Then wait until the scope is booted.This fixed all of them I tried so farPretty bad to get like 15 of these things and not a single one is working out of the box...

author: tinashe
author_rank: Newbie
timestamp: January 20, 2025, 11:24:42 am
content: Hie Fabian. I also face a similar problem with a rigol DHO914 I recently purchased. When I turn it on, the oscilloscope only lights up the keypads for a second, and then they turn off. The screen never turns on, and it just remains black. Can you please help me resolve this problem?
EspoTek Labrador (Open Source USB Oscilloscope) for $12.92 on Amazon US - Page 1
Forum section: electronics / testgear

author: Esposch T. Tapir
author_rank: Contributor
timestamp: January 12, 2025, 09:58:15 am
content: Long story short, Amazon in the US are selling a very, very cheap USB oscilloscope (EspoTek Labrador).Specifically supports the following features:- Oscilloscope (2 channel, 750ksps)- Arbitrary Waveform Generator (2 channel, 1MSPS per channel)- Power Supply (4.5 to 12V, 0.75W max output, with closed-loop feedback)- Logic Analyzer (2 channel, 3MSPS per channel, with serial decoding)- Multimeter (V/I/R/C)Reviews have been mostly pretty good (but not perfect, to be fair).Purchase link here:https://www.amazon.com/Espotek-EspoTek-Labrador-Board/dp/B0CQMPLKX7Full disclosure - I developed this board but I am not the seller (so not the one making money here - don't worry Dave!).Seems to be genuine old pandemic stock being liquidated by Jameco.
Keithley DMM6500 IR decoding possible? - Page 1
Forum section: electronics / testgear

author: JimKnopf
author_rank: Frequent Contributor
timestamp: May 01, 2024, 09:49:50 am
content: I was inspired by @Martin72 feature request in the Siglent SDS2000X HD threadhttps://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-missing-features-and-bugs/msg4518173/#msg4518173where he whishes an IR decoder from Siglent for testing IR Remotes on Oscilloscope using a so called Silver-Bullet Oscilloscope Infrared-Receiver (found it herehttps://www.analysir.com/blog/product/silver-bullet-oscilloscope-infrared-receiver/).I've build my own one soldering an 8,2k Ohm 0805 resistor on a IR LED. Works nice on Oscilloscope with the downside of a missing decoder.The DMM6500 has a Digitizer mode to measure Voltage and can measure 1 Mega-Samples per second. Not as much as the SDS2000X HD but maybe sufficient to capture IR signals. The result looks not too bad.Does anyone ever made a script for decoding IR signals for the DMM6500 or can guide me to write a script?

author: Swake
author_rank: Frequent Contributor
timestamp: January 11, 2025, 11:36:54 am
content: Thanks for the tip of using that IR receiver diode.

author: Kleinstein
author_rank: Super Contributor
timestamp: January 11, 2025, 12:13:41 pm
content: The DMM may have too much input impedance to use the detector with 8 K. It may still work with a smaller resistor (e.g. 470 ohm) and sufficient intesity.

author: egonotto
author_rank: Super Contributor
timestamp: January 11, 2025, 06:30:25 pm
content: Hello,why do you need a series resistor for the IR LED? The IR LED works as a sensor and converts IR light into voltage.Best regardsegonotto

author: voltsandjolts
author_rank: Unknown
timestamp: January 11, 2025, 07:56:21 pm
content: Parallel resistor is current to voltage converter.

author: JimKnopf
author_rank: Frequent Contributor
timestamp: January 11, 2025, 09:08:11 pm
content: I did some tests, i startet without a resistor. But the signal shape doesn't look that great. 8.2k was the best signal shape to me.

author: JimKnopf
author_rank: Frequent Contributor
timestamp: January 11, 2025, 09:09:13 pm
content: Another batch of screenshots.

author: JimKnopf
author_rank: Frequent Contributor
timestamp: January 11, 2025, 09:13:58 pm
content: The 8.2k resistor was the winner. I tested with a resistor decade using values i had in my shelf.Second image are 3 different types of IR LED without a resistor.