hybridfree/eevblog-posts huggingface dataset:
Siglent SDM3055 and SDG1032X questions - Page 1
Forum section: electronics / testgear

author: JimLev
author_rank: Contributor
timestamp: March 21, 2022, 03:22:11 am
content: I just bought the SDG1032X which has a 10MHz output on the back. How do you get it to output a signal? I looked in the online manual, not much info there or I missed it. I’ll get the 133 pages printed tomorrow.Next question.My SDM3055 will also read frequency. I connected the 1032X to it but it stops reading freq once I get around 2.7MHz. The 1032X is still outputting a sine wave, I verified it on my scope.Is this normal operation for the 3055. (I’ll get that manual printed tomorrow too)

author: Tjuurko
author_rank: Regular Contributor
timestamp: March 21, 2022, 03:34:51 am
content: SDM3055Frequency Measurement: 20 Hz - 1 MHz.

author: tautech
author_rank: Super Contributor
timestamp: March 21, 2022, 06:15:23 am
content: Quote from: JimLev on March 21, 2022, 03:22:11 amYou missed it.2.13.8 Clock Source on P118https://siglentna.com/wp-content/uploads/dlm_uploads/2017/10/SDG1000X_UserManual_UM0201X-E01D.pdf

author: JimLev
author_rank: Contributor
timestamp: March 21, 2022, 09:33:23 pm
content: Thanks for the info guys.I found out that the SDG1032X will read frequencies up to 200MHz so I can now sell my B&K Precision 1805 80MHz freq counter as well as my old Exact 122 signal generator.Tautech, I got the manuals printed today, looks like the one in your link is not the one that Siglent has available on their website. Seems it’s a newer version and has fewer pages than yours.The newer manual doesn’t have info on setting up the 10MHz output. I followed your instructions and it worked fine.I think I will need to go thru both manuals and print the pages that are missing from the newer manual.My SDM3055 is still working fine after you helped me with the frozen startup screen.

author: tautech
author_rank: Super Contributor
timestamp: March 21, 2022, 10:30:52 pm
content: Quote from: JimLev on March 21, 2022, 09:33:23 pmNA and HQ websites both list the same version: E01DI linked you the NA manual due to your location which makes it faster to load.The differences in the page numbering is how Adobe lists it vs theactualpage numbering in the manual.

author: JimLev
author_rank: Contributor
timestamp: March 22, 2022, 01:34:05 am
content: Yes I figured the Adobe and actual are different.The one I downloaded from Siglent was E08B.The E01D had 20+ more pages than mine.No problem, I’m up and operating.
Tektronix TDS5104 with no HDD - is it worth the trouble? - Page 1
Forum section: electronics / testgear

author: Rjevski
author_rank: Unknown
timestamp: March 06, 2022, 06:09:59 pm
content: Hello everyone,I might be able to get a good price (sub-200$) on a presumed working TDS5104 that just needs an HDD replaced. Is it still worth the trouble for that price (vs more modern scopes), and is there anything I should be aware of when it comes to reinstalling the OS & software?My understanding is that the OS is standard Windows 2000 which shouldn't be hard to source and I read somewhere that the software & drivers are available for free from Tek's website? Or are there more potential problems I should be aware of?This would also be my first scope - it's probably way overkill for a beginner but it shouldn't hurt to have more capability even if I don't end up using it, right?Regards.

author: mikehank
author_rank: Regular Contributor
timestamp: March 18, 2022, 08:42:34 pm
content: Contact a company called Norway Labs. They will sell you a new hd with a new image for your TDS5104. Not sure what they will charge.

author: Martin72
author_rank: Super Contributor
timestamp: March 18, 2022, 11:01:35 pm
content: QuoteI could tell you what I would do if I had the chance you have.In working condition, there are offerings in ebay between 2000...4000€.Defective, I´ve spotted one for slightly more than 1000.Regardless of it´s age, it´s still a scope with 1Ghz bandwith and 5GSa/s.And 4 channels.When you can get it for under 200 bucks, it is no question of yes or no.

author: nctnico
author_rank: Super Contributor
timestamp: March 19, 2022, 01:32:13 am
content: It will likely need a calibration as well. AFAIK you'll need extra equipment to do this. I'd do some thourough investigation into the amount of effort and skills needed to get this scope back to life. But even then you'll be left with a very specialistic tool aimed at high frequency measurements. I wouldn't want to use this model as a daily driver.You can buy an entry level DSO for the same amount of money you'll likely sink into the TDS5104 (to get it fixed) and get much more features and ease of use in return.
R&S SMB100M specs - Page 1
Forum section: electronics / testgear

author: Jackob
author_rank: Contributor
timestamp: March 18, 2022, 08:37:31 am
content: HiDoes anybody know if R&S SMB100M (SG-1364/U - MiL version of SMB100A) RF specifications are different from the standard SMB100A version? Especially - are there differences in phase noise or RF level accuracy specs? The differences in the feature set are obvious. Additionally - can SMB100A FW releases be used for SMB100M?Br, Jaakko
Siglent SDS2000X Plus Screen Issue - Page 1
Forum section: electronics / testgear

author: gtube
author_rank: Contributor
timestamp: March 17, 2022, 11:19:28 pm
content: Touching the centre of its touch screen with normal finger pressure creates an unwanted liquid moving effect. Please take a look at the video. I am wondering if it is normal for all sds2000x plus or just a bad copy? Thanks!https://youtube.com/shorts/qDaUseVzzjU?feature=share

author: tautech
author_rank: Super Contributor
timestamp: March 17, 2022, 11:42:50 pm
content: Normal.LCD = Liquid Crystal Display.
Tektronix active probe repair parts or repair probe cost ?? - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: March 15, 2022, 01:02:39 am
content: My request to Tektronix for several repair parts for the Tektronix active probes, especially the P6245 for now, was rejected. They sent me a copy of the manual so I could buy more probe pins and little bits of wire, which I already know.They echoed what the manual says ... send it in for repair.I have a growing collection of this probe and others and for the last 15 or more years, every one I picked up to use at work had the clear plastic tip cracked or broken.I also inquired about the small, conductive spring material (similar to a "Fuzzbutton").Sending an originally > $3k probe for repair can't be cheap.Has anyone had a probe repaired by them? What was the cost for a simple tip end repair?The clear plastic part snaps into place, the female pin presses into it and the conductive part joins the pin to the gold plated end of the probe hybrid.I believe the parts all crack because of heating of the probe coupled with their choice of plastic and tolerances. They were not abused.This was probably a $1 part in production. I refuse to pay $800 (??) or so for a replacement of a $1 or less part.But then again, my Keysight scope will need a $5k assembly if a $0.02 capacitor causes a strange problem.OTOH, I suppose this is just one more welcome to the future of hobby or personal electronic test gear.

author: EE-digger
author_rank: Frequent Contributor
timestamp: March 15, 2022, 04:10:46 pm
content: Just had a quote for $2000 to repair each of these <expletive deleted> probes.This to replace what is probably a $1 part, the clear plastic end cap.I'll look around some more but if no one responds, I will probably do a high res 3D print or CNC machine some.This is a sad state of affairs for our test equipment, where the top companies will only touch it for a $2000 (or higher) cover fee.

author: TERRA Operative
author_rank: Super Contributor
timestamp: March 15, 2022, 04:16:09 pm
content: Resin printing could be a good way to make spares.

author: mikehank
author_rank: Regular Contributor
timestamp: March 18, 2022, 08:34:45 pm
content: Tek's probe repair policy is they just give you a new replacement. They don't even fix them with exception of current probes and very high end probes(25Ghz and up).
Hantek 1833C Keysight U1733C LCR meter comparison - Page 1
Forum section: electronics / testgear

author: exit_failure
author_rank: Regular Contributor
timestamp: May 21, 2021, 08:12:55 pm
content: Hi,right know I have the Hantek 1833C and the Keysight U1733C LCR meters on my desk. Please let me know, if you are interested in a comparison. If yes, please also tell me which comparisons, tests, etc you'd like to see, since I've never really systematically compared two devices like these.

author: andymok
author_rank: Contributor
timestamp: March 19, 2022, 07:51:18 pm
content: Hi there! I have just started my research, deciding whether to get an East Tester ET-432, Hantek 1833C or the DER EE DE-5000. How do you find your meters so far?

author: Martin72
author_rank: Super Contributor
timestamp: March 19, 2022, 08:19:15 pm
content: Hi,I got the DE-5000 and a ET4410...Actually, the ET4410 is "under test", I´ve startet a thread about it.The DE-5000 I´ve compared at work with two calibrated LCRs, a U1733C and a one from sourcetronic, a few weeks ago.And of course actually at home with my new ET4410.What I can say is, the DE-5000 is a surprising good LCR, with all the components I´ve compared the LCRs so far, all the meters are close together, including the DE-5000.

author: mawyatt
author_rank: Super Contributor
timestamp: March 19, 2022, 08:36:29 pm
content: Quote from: Martin72 on March 19, 2022, 08:19:15 pmSame here, the DE-5000 is spot on relative to our Tonghui TH2830, very impressed with the DE-5000. The fixtures work well also, and a re inexpensive!!Best,
Beeping BM235 - Page 1
Forum section: electronics / testgear

author: lpdunwell
author_rank: Newbie
timestamp: March 18, 2022, 02:07:43 pm
content: hi all.so I have this rev D BM235 which was collecting dust for long enough without improving.it switches on, but none of the buttons do anything while switched on besides beeping for as long as they are being held.sometimes, on a good day, holding select, range or rec for a couple seconds (during which it beeps constantly) will reset it, showing the 'all segements active' like on power on.the led does not light up at all.the modes i reach when switching it on generally work. i just have no way to reach functions that rely on me pressing a button.afaik this never did work any better.has this kind of fault been observed before?cheers from switzerland,luke
Sugon t3602 problems - Page 1
Forum section: electronics / testgear

author: wons
author_rank: Contributor
timestamp: March 17, 2022, 08:25:02 pm
content: HeyGot myself a sugon t3602 the left handle didnt heat up but the right handle works fine and reached 400 degree C in secondsI cant send it to service so i started repair myselfSo i worked around some soldering issues and now it reached 150 at most(when set to 300 degree C)Does anyone knows if the two pictures attached at ok?1. Resistor 10k in one harness but not in the second one2. 1k pulldown resistor from microcontroller pin

author: wons
author_rank: Contributor
timestamp: March 17, 2022, 08:39:40 pm
content: Second image

author: PeterKlop
author_rank: Contributor
timestamp: March 17, 2022, 09:35:51 pm
content: When i had problems with my Sugon (a different one) i got them to send me a new motherboard for a very small fee. After replacing it all was good. Perhaps this is an idea for you too? They don't like getting stuff back for repair so perhaps they are willing to accomodate you this way.
Using/Hacking the Tektronix RTPA2A as a TekConnect Adapter - Page 1
Forum section: electronics / testgear

author: FlexibleMammoth
author_rank: Regular Contributor
timestamp: March 17, 2022, 04:36:51 pm
content: I stumbled across this device, which seems to follow a very similar concept to the old 1103 TekProbe adapter. However, the manual specifies it can only be used with a rather short list of compatible Tek RTSAs, and the USB lead must be connected to enable power to the probe.Does anyone have such a device? I was thinking it could be „massaged“ to work with unsupported devices…Manual here:https://download.tek.com/manual/071176601.pdf
Anritsu MT8801B  trouble - Page 1
Forum section: electronics / testgear

author: ct2iok
author_rank: Newbie
timestamp: March 17, 2022, 09:52:06 pm
content: I have an Anritsu MT8801B , which I bought "for parts" and which I am trying to recoverI've already solved some problems, but I have one that I don't know how to solve.In specktrum analyzer mode, it works perfectly for 1 to 3 minutes (this time is variable). , after this time the same signal appears (-7dBm) but at 20.39 Mhz and it goes up slowly but it is never correct, until it turns off and on again after a few hours, and after such minutes it returns to the same error, the same happens in analog tester mode.RX Mesure mode (RF generator) and Power meter mode work perfectlyThanks in advance for your help

author: bob91343
author_rank: Super Contributor
timestamp: March 17, 2022, 11:09:52 pm
content: Perhaps it's a temperature issue. You could try spraying freeze or heating with an iron or measuring for hotspots with an infrared probe.

author: ct2iok
author_rank: Newbie
timestamp: March 18, 2022, 10:11:26 am
content: thank you very much, i will try to check
Multicomp PRO MP720776, Four Channel Tablet Oscilloscope, 100 Mhz, 1GSPS - Page 1
Forum section: electronics / testgear

author: Simon W...
author_rank: Newbie
timestamp: March 16, 2022, 02:00:57 am
content: Just wondering if there are any other users of this device around ?I'm experiencing difficulty in getting the UART Trigger Mode to work (?) or make sense of it's operation.I can trigger on a single serial byte using the conventional edge trigger mode.Thank you.

author: tunk
author_rank: Super Contributor
timestamp: March 16, 2022, 11:14:04 am
content: AFAIK Multicomp oscilloscopes are rebrands. See if you can find some info about the OEM model.(Don't know about this one, but some of the other Multicomps are rebranded Owons.)

author: Kean
author_rank: Unknown
timestamp: March 16, 2022, 11:28:42 am
content: Yes, it looks just like an Owon TAO3000 Serieshttps://www.owon.com.hk/products_tao3000_series_2ch_8%7C14bit_tablet_oscilloscope

author: nctnico
author_rank: Super Contributor
timestamp: March 16, 2022, 10:03:41 pm
content: If it can be returned, return it and get a MicSig TO1000 series which just works for the same money.

author: 2N3055
author_rank: Super Contributor
timestamp: March 16, 2022, 11:25:14 pm
content: Quote from: nctnico on March 16, 2022, 10:03:41 pmThis!
Berg GPIB cable quality - Page 1
Forum section: electronics / testgear

author: matthuszagh
author_rank: Frequent Contributor
timestamp: March 16, 2022, 02:10:04 pm
content: I recently ordered some HP/Agilent GPIB cables from Ebay. As a result of some issues, the seller had to replace some of the cables with Berg GPIB cables. Are these of comparable quality to the HP/Agilent cables? Are Berg products in general high quality? It appears that Berg was bought by Amphenol, which I guess is a vote of confidence.I use these cables to control a fairly large number of old HP instruments. Since these instruments are well past their designed lifespan they can develop issues. The last thing I want is to experience difficult-to-diagnose issues resulting from subpar cables, especially since I don't know of any good ways to test them. This is why I deliberately bought HP/Agilent versions.

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: March 17, 2022, 03:22:54 am
content: GPIB cables are generally build to very high mechanical standards, so unlikely to have a problem. Of course it's possible one cable was particularly abused, but it would probably show signs of mechanical stress on the outside. My guess HP/Agilent had been outsourcing their cable manufacturing to some place like Berg for many years. I would trust these old cables as much as any new ones made who knows where.
Good inductance meter? - Page 1
Forum section: electronics / testgear

author: Axtman
author_rank: Regular Contributor
timestamp: March 18, 2022, 12:01:38 am
content: Hello. I am looking to buy a good multimeter that measures inductance. I have some guitar pickups that I would like to check out. What do you recommend. Thanks.

author: Esquared
author_rank: Contributor
timestamp: March 18, 2022, 01:49:28 am
content: DE-5000 Handheld LCR Meter is your best bet. You can usually pick them up for around $130 US with all the attachments. I got mine a few months ago to help quantify a large solenoid's inductance that the manufacturer refused to share with us. If your price point is higher then I would look at getting a benchtop unit.

author: bob91343
author_rank: Super Contributor
timestamp: March 18, 2022, 02:57:00 am
content: I have two vintage GR bridges that do an excellent job. Guitar pickups don't have dc flowing so their inductance is more easily characterized. I wonder how the little Chinese magic component tester (TC-1?) would do. I guess it depends on the quality of the results you feel you need.
Thoughts on Mastech MS8050 - Page 1
Forum section: electronics / testgear

author: finos
author_rank: Contributor
timestamp: March 08, 2022, 01:39:11 am
content: Hello everyone .Im intrested in buying a Desktop DMM. I ran across the Mastech MS8050 and based on the specs it seems to fulfill my needs as a hobbyist/EE student .I know it's kind of an overkill but still, I found it for around 250€ that makes it look like an "ok" deal .I want your thoughts on this meter ,if I should or should I not buy it .Thanks in advance .

author: rsjsouza
author_rank: Super Contributor
timestamp: March 08, 2022, 01:58:30 am
content: Unfortunately I don't know this meter, but you may want to look at the discussions here in the EEVBloghttps://eevblog.com/forum/testgear/mastech-ms8050-digital-bench-multimeter/https://www.eevblog.com/forum/repair/if-you_ve-got-a-mastech-ms8050/https://www.eevblog.com/forum/testgear/part-2-teardownevaluation-mastech-ms8040-bench-dmm/

author: HKJ
author_rank: Super Contributor
timestamp: March 08, 2022, 12:48:38 pm
content: I have not used or tested it, but it looks like a fairly low end desktop meter. Precision is close to high end hand-held meters.It is missing the 4-terminal and probably also the high-z functions from more advanced meters. It is also missing a graphical display, but that can be partially offset with the computer connection.Generally it looks like a fairly good meter, that is a bit better than a hand-held meter for desk usage.Note: I have played with a lot of multimeters over time:https://lygte-info.dk/info/DMMReviews.html

author: DaleWentz
author_rank: Newbie
timestamp: March 17, 2022, 08:54:38 pm
content: I have this meter, as well as an good HP and a Siglent. The Mastech is my main bench meter that I use for normal everyday things. Its fast and accurate enough for most things. I like the large display. My only gripe is that the backlight does not stay on full time. I have not took the time to open it up and fix that! If it broke I would replace it with the exact same meter. I prefer bench meters on the bench personally over a standard hand held.Dale
Service Manual for Philips/Fluke PM5139 ? - Page 1
Forum section: electronics / testgear

author: giovannirat
author_rank: Regular Contributor
timestamp: March 15, 2022, 09:30:28 am
content: I've got an old Philips function generator PM5139.It needs some adjustments. Unfortunately I was not able to find the PM5139 Service Manual (NOT for the PM5193 !)I would be really grateful if someone could provide this service manual.Thank you very much.

author: HighVoltage
author_rank: Super Contributor
timestamp: March 15, 2022, 01:50:23 pm
content: I used to have a PM5139 that was broken and I looked for the service manual and could not find it. I think there is no service manual available in the open.However, the PM5139 was not too difficult to repair without service manual.

author: tautech
author_rank: Super Contributor
timestamp: March 15, 2022, 02:10:50 pm
content: From the users manual, the service manual is 4822 872 15206Google brings up zip.Good luck with your hunting.
Digitech qc1932 scope screen problems - Page 1
Forum section: electronics / testgear

author: nzmikec
author_rank: Contributor
timestamp: March 15, 2022, 05:12:32 am
content: Hi all,Ive purchased my first basic scope - the Digitech qc1932. It was sold to me as used in a school environment but appears to have been unused as the screen protector still on etc. Unfortunately when I received it and powered it on the screen seems to be problematic with both the boot image (splash screen) and scope image being reversed, corrupted and overlapping. See pics.Initially I thought this would be a simple screen ribbon cable issue and opened it up. The cable seemed in place correctly so I reseated the terminals however this did not fix the problem.Another thought I had is that maybe the scope was flashed with incompatible hardware? Looks like Digitech used this model number across a few products based on Siglent hardware.Has anyone any idea what might be the issue here?ThanksMike.

author: tautech
author_rank: Super Contributor
timestamp: March 15, 2022, 05:27:44 am
content: Fairly sure that's a display ribbon cable fault.I can't remember if these have a secondary ribbon cable connector on the rear of the display which to get to requires almost a complete dismantle. Unlike the socket on the mainboard IIRC they didn't have a retaining tape and these ribbon cable sockets have a somewhat fragile locking system so be sure to take care with them.If you get the cable free between the mainboard and display and buzz it out and find it faulty there's a good chance I have one here.

author: nzmikec
author_rank: Contributor
timestamp: March 15, 2022, 06:40:24 am
content: Thanks,Yes the ribbon cable goes from the main board to a small PCB connector taped to the back of the screen. There is then a second cable going from this PCB into the screen. Getting to this did require extensive disassembly - removing the power supply PCB to get to the screws securing the front of the case to the steel casing. The small PCB tapped to the back of the screen has the cables glued in, I didn't muck around with these connections as they looked good but I guess the fault could be there? Ill take another look tomorrow. Will also check continuity of the cable thanks.Thank you very much for your help, you have saved me from going off on the firmware tangent.

author: Muttley Snickers
author_rank: Unknown
timestamp: March 15, 2022, 08:55:42 am
content: Another member also had a reversed screen problem so it might be worth having a read ofthis threadbefore you pull it apart again.

author: nzmikec
author_rank: Contributor
timestamp: March 16, 2022, 02:11:40 am
content: Thanks everyone,Ive just got the scope working again.I disassembled the scope and got access to the small ribbon cable connector (pictured) and removed the silicone and cables. Cleaned / reseated and assembled. It looks like this is the same issue linked to in the above post also.Regards,Mike
RIGOL signal storage - Page 1
Forum section: electronics / testgear

author: fsonnichsen
author_rank: Newbie
timestamp: March 13, 2022, 12:21:27 pm
content: I had used a Rigol scope for some time with good results. However I never quite understood storage. Going thru all the usual gyrations to set up a USB flash on it I am saving some CSV images. But what is not clear to me is once set up-how to I start the storage process. It seems to immediately begin while I am setting up the USB. Also it is not entirely clear how many samples are stored--perhaps this relates to the sample width setting for the overall scope.What I want to do of course, is get everything ready and then start my IC (an I2C device in this case) while capturing.I have read their manual and it does no clarify thisthanksFritz

author: Fungus
author_rank: Super Contributor
timestamp: March 13, 2022, 12:35:30 pm
content: I think what you need to do is to set up I2C trigger then put the 'scope in "single shot" mode.When your I2C device starts to transmit then the 'scope will capture signal and you can save it manually if you see it's what you wanted.

author: H.O
author_rank: Frequent Contributor
timestamp: March 13, 2022, 06:32:20 pm
content: The term storage, when it comes to digital scopes in general, means that the scope digitizes andstoresthe waveform in memory from which it then renders the waveform onto to the display.The user canthen(ie after the signal has been digitized and stored in internal memory) choose to save that waveform data to an external device such as an USB memory stick but that's usually a manual process where you decide to save a specific acqusition/waveform. As far as I'm aware, there's no way to automatically (like once per trigger) save/store acqusitions to the USB-stick - if that's what you're looking for.If you want to capture, and save, multiple I2C transactions spaced apart by relatively long (as in several ms) periods of "silence" then what you want is, as Fungus says, first to setup your trigger to properly trig on the I2C signal and then use segmented memory to acquire multiple frames (trigger events). Once you have those frames in memory you should then be able to export/save them to the USB-stick.If you need help on the specific details I suggest you you tell us which Rigol scope you're using since there's a bit of a difference difference between a 1052E and a DSO70000 :-)
Looking for Flir MR users - MR176/MR277/MR77 (Moisture meters) - Page 1
Forum section: electronics / testgear

author: kaz911
author_rank: Super Contributor
timestamp: March 13, 2022, 02:30:39 pm
content: Hi,are there any other Flir MR users here? Especially MR series with detachable temperature / humidity sensors. So those are at least the MR77/MR176 and MR277 series of very expensive Temperature/Humidity measurement devices.I seem to have found a "very big bug" - and I would like verification from a few more users before I draw final conclusions.Please contact me via pm or answer here.
Tek 2465 with faulty HV Module Power fault. - Page 1
Forum section: electronics / testgear

author: gazzaplus
author_rank: Newbie
timestamp: March 13, 2022, 11:29:58 am
content: Hi All,My faithful old 2465 died a few years ago and decided not to repair, fatal mistake, I now need a scope.The problem is there is no display, seems to pass the power on test ok. Front panel lights look good as if it's ready to go.When the scope failed initially I noticed that Q1981 was extremely hot. { Need to clarify a few points, I have the service manual for the 2465 (downloaded) but the PCA layout of the A9 is different to mine, the closest layout which I"m using is for the 2465B, the A9 part number of my scope is 670-7277-07 }Using the 2465 schematic and troubleshooting the fault I disconnected pin 7 of U1830 the HV Module. No over heating and the -15v at pin 4 of T1970 returned. Removed pin 2 of the HV Module thereby removing the CRT cathode form the circuit and reconnected pin 7 of U1830. The -15V dropped to -9v, but no overheating of Q1981. Did some resistance measurements of the crt to make sure there were no internal shorts and all were high resistance.Resistance measured between U1830 pins 2 & 14 and got 10K, correct. Negative end of dmm on U1830 pin 9 and positive probe on pin 2 had no reading. Possible for high voltage diodes even forward biased.Did the same test from U1830 pin 3 to pin 2 no reading.I'ts not possible to measure the tripler, resistance wise or its output voltage of 14kv.I've made measurements at different points with pin 7 disconnected and all voltages are correct. Can't scope anything though.I would be guessing that the HV Module has an internal short but I don't order parts based on a hunch. Like to be 90% sure and this is were I asked the forum for help and any suggestions as to what to do next. No doubt I have not included some pertinent information, please ask.I have attached images of the schematic 2465 I'm using and A9 PCA layout.Thanksgazza
Encoder needed for HP54600 Series - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: March 12, 2022, 05:47:18 pm
content: I am looking for one encoder non click type for a HP54601/2/3/45/A/B, etc. Non click are the ones that have the blue plastic shafts.The one for the trigger level on my HP54645A came mechanically damaged :-((.Thanks!SamW3OHMP.S. I said black shaft in my previous post. The non click ones have a BLUE shaft. Duh!
The simplest, cheapest ESR meter circuit  - Page 1
Forum section: electronics / testgear

author: abdulbadii
author_rank: Frequent Contributor
timestamp: September 20, 2021, 10:30:36 am
content: Any experienced expert in creating some testing instrument here ?What'd the simplest, cheapest and most practical ESR meter circuit be, requiring only 6 V PS (not 9 as usually) while it's reliable enough to perform a test with ~ 2% (or even just 2.5%) tolerance

author: ledtester
author_rank: Super Contributor
timestamp: September 20, 2021, 11:03:18 am
content: https://eevblog.com/forum/projects/5-transistor-esr-meter-design/

author: kripton2035
author_rank: Super Contributor
timestamp: September 20, 2021, 12:24:02 pm
content: lots of ideas here :http://kripton2035.free.fr/esr-repository.htmlthe easiest today is the one above, or the same adapter from the same author :http://kripton2035.free.fr/analog%20esr/esr-dmm-adapter-.html

author: Hexley
author_rank: Regular Contributor
timestamp: September 20, 2021, 10:08:31 pm
content: This one will run off 5V directly, or 7V if you use the on-board regulator. Simple to build -- just a single op amp.http://ludens.cl/Electron/esr/esr.html

author: BrokenYugo
author_rank: Super Contributor
timestamp: September 21, 2021, 07:43:33 pm
content: Runs straight off a 9V, but there is also this 6 transistor design also from Jay_Diddy_B that interfaces with a DMM at 100mV/ohm. I haven't built it yet, but like that it's all generic transistors and doesn't require finding/buying a $10 50uA meter that doesn't really appear in more modern and modest junk boxes. Only trouble is it seems nobody else built it yet to prove that it's a stable easily reproduced design like the other two from them, I intend to breadboard it eventually, build it through hole on perf board if that works, probably this winter when I dig harder into my project backlog.https://www.eevblog.com/forum/projects/10-transistor-esr-meter-adapter/

author: CMTan
author_rank: Contributor
timestamp: March 13, 2022, 01:22:43 pm
content: Hi All,Anyone wants to build one can also use the design I did. This is based off the Luden's design, but being a design engineer I have to evaluate the flaws in this design and to correct it as much as possible. Not perfect, but definitely better and can be build with consistence performance. I have also some question for developer to think about, so as to understand the design at a deeper level.https://electronicsdesignfun.blogspot.com/p/esr-meter.html
HMC8043 Calibration Manual/ Or even how to. - Page 1
Forum section: electronics / testgear

author: RoadRunner
author_rank: Frequent Contributor
timestamp: March 13, 2022, 12:32:17 am
content: Hallo,I have with me somewhat old HMC8043, It is out of calibration on voltage. I have looked around on the web but there seems to be no info about how to perform even basic calibration. I wonder if any one has manual or even the commands needed for calibration.Regards
34138A test leads - Page 1
Forum section: electronics / testgear

author: Traceless
author_rank: Frequent Contributor
timestamp: March 12, 2022, 06:02:19 pm
content: Is it normal that Keysight's 34138A test leads have (red) plastic capsinside bothbanana connectors? I'm not talking about the dust protection caps, I mean plastic caps on the tip of the contact/pin inside the connector.

author: AVGresponding
author_rank: Super Contributor
timestamp: March 12, 2022, 07:22:03 pm
content: Yes.

author: Traceless
author_rank: Frequent Contributor
timestamp: March 12, 2022, 07:48:54 pm
content: @AVGresponding: Thanks, I've honestly never seen that on any other type of test lead. The fact that the caps are red even inside the black probe had me wondering if that was a manufacturing defect.

author: tautech
author_rank: Super Contributor
timestamp: March 12, 2022, 07:55:32 pm
content: No it's typical of the modern safety shrouded banana plug.

author: gamalot
author_rank: Super Contributor
timestamp: March 12, 2022, 08:43:32 pm
content: Don't worry, all of my Keysight test leads have the same banana plugs.

author: gamalot
author_rank: Super Contributor
timestamp: March 12, 2022, 08:56:22 pm
content: Found another one. The banana plugs on my Hioki L2101 Kelvin test leads also have the same color scheme.

author: nightfire
author_rank: Frequent Contributor
timestamp: March 12, 2022, 10:12:43 pm
content: Also lots of 3rd party leads etc. have those- due to some regulations, it is IMHO also a cool thing to prevent accidental touching of leads that could in the field be attached to something with 230 Volts or more...
Wavetek 186  - Page 1
Forum section: electronics / testgear

author: Axtman
author_rank: Regular Contributor
timestamp: March 11, 2022, 04:12:39 pm
content: Does anyone have a service manual for a Wavetek 186 5 MHz Phase Lock Generator? Thanks.

author: precaud
author_rank: Frequent Contributor
timestamp: March 12, 2022, 05:40:35 pm
content: Artek has it available on their website.
advantest r3131a TG issues - Page 1
Forum section: electronics / testgear

author: kc8gpd
author_rank: Newbie
timestamp: March 12, 2022, 09:59:48 am
content: i scored a advantest r3131a. well i'm having tracking generator issues. the TG starts out strong then after a few minutes the output goes weak and eventually down to nothing. i let the analyzer warm up first, so it's not a warm up issue. i turn off TG (not the spec an) for a few minutes and it comes back strong then weakens over a few minutes again. could it be a power supply issue? anybody have pics / procedure of where i should be looking and what i should replace?Note: i did use the search function first and found nothing on point that i could see.
Phase locking two E8257D's for pulsing two different frequencies? - Page 1
Forum section: electronics / testgear

author: Plasmateur
author_rank: Regular Contributor
timestamp: March 11, 2022, 07:00:50 pm
content: Hello, I am having an issue with pulsing two different frequencies with the goal of each pulse starting at 0 phase even with the 10 MHz clocks linkedI have two aglient/keysightE8257Dsignal generators. Each one is set to their own respective frequency.f1 = 4.5 GHzf2 = 4.057 GHzdifference = 7 MHzI have each one in pulse mode and they are set to an external trigger. When I trigger them, they do not each start at 0 phase. The one that is off of some multipul of the 10 MHz clock (f2) just jitters about.I have no problem setting this up so long as each frequency is a multiple of 10 MHz.f1 = 4.510 GHzf2 = 4.520 GHzDifference = 10 MHzThe above scenario works perfect every time. Why is this? Is there a way to pulse these signal generators so they are locked to begin at 0 phase each when not at a multipul of 10 MHz?The only way I can think to get around this is to use my Siglent SDG6052X and2 frequency multipliers. What do people do when they need a setup like this?
Brymen BM857, looking for a link cable - Page 1
Forum section: electronics / testgear

author: DiTBho
author_rank: Super Contributor
timestamp: April 12, 2021, 03:56:26 pm
content: I am tempted to buy one unit but I also I need a cable to log some values. When I asked the seller if the RS232 adapting cable is included he answered thisQuoteUnfortunately he doesn't have any cable for sale, and I don't know where to buy it. I wonder ... is there a guide or an hack to make an homemade one?Edit:BM857

author: HKJ
author_rank: Super Contributor
timestamp: April 12, 2021, 04:21:28 pm
content: The cable is called BU-86X and is USB only.You can get it and the meter at:https://www.welectron.com/orhttps://brymen.eu/The software is include on a CD or can be downloaded from Brymen.You can also usehttps://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/for logging, it is considerable more advanced than the Brymen software.If you want a Brymen meter with RS232 check the BM257s and interface BRUA-20X, again there is Brymen software and the other software listed above.

author: DiTBho
author_rank: Super Contributor
timestamp: April 12, 2021, 09:47:50 pm
content: Wrong model, I meantthis: BM857QuoteQuoteThis is the connector:For the software I am willing to write my own software for Linux, I have the documentation about the protocol.

author: DiTBho
author_rank: Super Contributor
timestamp: April 12, 2021, 10:04:06 pm
content: A seller answered thisQuote60 Euro umm ... I wonder if someone has already built an homemadeBRUA-85XA-like adapter

author: pjwum
author_rank: Contributor
timestamp: April 13, 2021, 03:52:04 pm
content: Quote from: DiTBho on April 12, 2021, 03:56:26 pmOne alternative is the embedblog adapter herehttp://embedblog.eu/?p=475. Schematic and 3d-print are free and he also sells the unit for very reasonable 10 EUR. The ATTiny adapter expects a BM869S for signal decoding, but you can configure it to send raw data to the USB port. This way it will work with almost all Brymens.I purchased one myself for a BM829s and configured an Excel spreadsheet to translate the raw data. Works very reliably and gives me more flexibility than with the original cable.Patrick

author: DiTBho
author_rank: Super Contributor
timestamp: March 10, 2022, 03:44:59 pm
content: I need to buy a new one. Is there a shop or anything?

author: Fungus
author_rank: Super Contributor
timestamp: March 10, 2022, 05:28:34 pm
content: You scan buy directly from from brymen.eu

author: rsjsouza
author_rank: Super Contributor
timestamp: March 10, 2022, 07:48:26 pm
content: Tme.eu sells the BRUA-85XA for US$40.77 (at least for me)https://www.tme.com/br/pt/details/kitbrua-85xa/medidores-software/brymen/kit-brua-85xa/I have its older version BR85X (BC-85X-1), which is RS232C only and it was the only compatible (I think) with the older versions of the BM857/859 (non A, or S).Check the last photo of my page at:https://sites.google.com/view/vbeletronico/brymen-bm857-misc-071

author: DiTBho
author_rank: Super Contributor
timestamp: March 11, 2022, 02:38:41 pm
content: Bought! Thanks guys
What's the type of internal hard disk of keysight n9020a spectrum analyzer? - Page 1
Forum section: electronics / testgear

author: nicegirl
author_rank: Contributor
timestamp: March 11, 2022, 08:23:44 am
content: I already bought a second hand keysight n9020a spectrum analyzer.I try to replace the internal hard disk with a new bigger one.What's the type of internal hard disk of keysight n9020a spectrum analyzer?If you know the replacement model of hard disk,thanks in advance.

author: 1Ghz
author_rank: Unknown
timestamp: March 11, 2022, 09:05:17 am
content: Press "F2" or "Delete" key during analyzer boot up and get into the BIOS settings, you may find the hard disk model name from the BIOS.If you want replace the hard disk, please follow the Internally Mounted Disk Drive replacement procedure in the service manual on chapter 14.You can find the Keysight N9020A MXA service manual on the internet.
Program IEEE-488 & Fluke 8842A & Agilent 82357B GPIB converter - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: March 10, 2022, 08:54:06 pm
content: Hi,I just want to test the IEEE-488 interface on a couple of Fluke 8842A meters.From what I recall the Test Controller (data logger for many multi-meters) program does not support the 82357B USB adapter, and I don't have the Arduino GPIB adapter.Is there something free and easy to access to do a quick test of these 8842A ports (that works with the 82357B adapter)?

author: Venturi962
author_rank: Regular Contributor
timestamp: March 10, 2022, 09:42:15 pm
content: I recommend WinGPIB:https://www.eevblog.com/forum/metrology/3458a-logging-via-windows-app-revisited/
Tektronix MSO 4 Series 500GS/s Equivalent Time Sampling? - Page 1
Forum section: electronics / testgear

author: ftwang
author_rank: Newbie
timestamp: March 10, 2022, 09:23:17 am
content: I just recently bought the MSO 4 series, and noticed that I can manually configure the sampling rate up to 500GS/s, even though the scope specification only lists it as 6.25GS/s. For sampling rates above 6.25GS/s is the scope running in equivalent time sampling instead of real time sampling? What is the benefit of such high sampling rate, when the bandwidth itself is limited to a maximum of 1.5GHz for this series? Is it for the high-res mode...?

author: Domitronic
author_rank: Regular Contributor
timestamp: March 10, 2022, 10:39:50 am
content: The datasheet says:Sample rate range :1.5625 S/s to 6.25 GS/s (real time)12.5 GS/s to 500 GS/s (interpolated)So i guess just some interpolation between the real time samples. Not sure what this would be used for. Maybe have a look at the user manual of the device.

author: tv84
author_rank: Super Contributor
timestamp: March 10, 2022, 10:58:28 am
content: Quote from: ftwang on March 10, 2022, 09:23:17 amI also would like to know, from the gurus here, why a brand like Tek has the need to advertise such a gymnic.

author: ftwang
author_rank: Newbie
timestamp: March 10, 2022, 12:35:32 pm
content: Thanks! Unfortunately I couldn't find anything in the manual nor on Tek's website.I think you are right though that the scope is just interpolating between the sampled points. I zoomed into the plot and changed the waveform display to "dots". It shows that the scope is still sampling at 6.25GS/s, not sure why Tek advertise this "interpolated" sampling rate.

author: Domitronic
author_rank: Regular Contributor
timestamp: March 10, 2022, 01:30:20 pm
content: From the manual / printable help:Interpolated Real-Time samplingIn interpolated real-time sampling, the instrument digitizes all of the points it acquires using one trigger event. If the instrument cannotacquire enough samples for a complete waveform at the maximum real-time sample rate, it interpolates. Use interpolated real-timesampling to capture single-shot or transient events.

author: Sighound36
author_rank: Frequent Contributor
timestamp: March 10, 2022, 03:08:04 pm
content: Just like the time we had the Tek 6000 that clearly showed Zeptosec jitter

author: nctnico
author_rank: Super Contributor
timestamp: March 10, 2022, 05:12:59 pm
content: Quote from: ftwang on March 10, 2022, 09:23:17 amBack in the old days DSOs has equivalent time sampling but with 6.25Gs/s that isn't needed for acquire a 1.5GHz signal. I guess the 'virtual' samplerate shows the amount of extra points created by doing interpolation but to me it seems like a useless number.
Tektronix 2230 - Dot Only, No Line - Page 1
Forum section: electronics / testgear

author: bluearchtop
author_rank: Newbie
timestamp: March 10, 2022, 01:18:47 am
content: Hello! First, let me say I am new to scopes (sorry!). I just got a 2230 which I was told was working but I can't seem to get it to show the horizontal line. Only a dot. I've tried lots of different things, but apparently not the right thing. Here is a photo of what I have. I actually don't have the probe yet (it's on the way). Does a probe need to be connected for the line to show?Thanks!

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 10, 2022, 01:36:53 am
content: Have not used that model but you can use a piece of wire from probe test to center of ch 1 input BNC. ADD is not correct for only one channel selected, turn on ch 2 use ALT or chop and play with controls on right side, see what you can get.Jeff

author: bluearchtop
author_rank: Newbie
timestamp: March 10, 2022, 01:55:57 am
content: Thanks, that was helpful. Using wire for the probe got it showing a line. Appreciate it.

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: March 10, 2022, 03:05:01 am
content: It looks like the XY mode button is pressed. That will produce a dot with no channel inputs.
strange 34465a IV test result - Page 1
Forum section: electronics / testgear

author: analogNewbie
author_rank: Regular Contributor
timestamp: March 09, 2022, 06:29:46 am
content: 34465A is set to 10V range, input Z auto.B2987A provides voltage to 34465A, and measure current.V(volt) I(pA)0 7.11 9.12 10.23 11.14 13.15 15.26 15.57 15.78 14.89 13.810 12.2It's strange that the current gets smaller when V>8.

author: Kleinstein
author_rank: Super Contributor
timestamp: March 09, 2022, 12:16:30 pm
content: The input current does not have to be a linear function of the voltage. Especially the current from charge injection due to Az switching can be nonlinear and possibly getting smaller with higher voltage.

author: analogNewbie
author_rank: Regular Contributor
timestamp: March 09, 2022, 03:37:45 pm
content: ThanksThe data is much better after turning off auto zeroV I0 1.01 1.92 2.03 2.04 2.75 4.16 5.37 6.58 7.69 8.610 9.9
TEK TDS 380 option 14 help pls - Page 1
Forum section: electronics / testgear

author: frantisek
author_rank: Regular Contributor
timestamp: March 14, 2022, 10:58:41 am
content: Greetings dear colleagues and ask for advice. If I take option 14 from TDS380 and put it in another that didn't have it, does something have to be set? Or does the oscilloscope set it up for itself? If a colleague from the Czech Republic reads it, or someone knows about it, please contact PM. I found his post but did not save .. Thank you!
ASCII decoding on MSO/DPO/MDO Tek scopes - Page 1
Forum section: electronics / testgear

author: Fred8
author_rank: Newbie
timestamp: November 22, 2020, 02:20:58 pm
content: Hi folks !Does someone know if there is a (good) reason why Tektronix do not provide ASCII decoding in their MSO/DPO/MDO (4000 and others), except for RS232 bus.This is weird isn't it ? Lecroy, Rigol and I think other ones do it. But Tek, no. Do they think at Tektronix that a man that wants ASCII decoding for I2C or SPI is a too bad one to merit their scopes ?Allo Tektro !https://fr.tek.com/datasheet/serial-triggering-and-analysis

author: TP126779
author_rank: Newbie
timestamp: March 02, 2022, 09:33:36 am
content: Has there been an update on that issue?This would be a deal breaker for me. Convenience...

author: Fred8
author_rank: Newbie
timestamp: March 08, 2022, 09:03:52 pm
content: Hello !Well, in fact, there was only your reply my friend !

author: Electro Fan
author_rank: Super Contributor
timestamp: March 09, 2022, 10:00:19 am
content: It’s been awhile but I think I’ve seen some USB logic analyzers / software that seem to only support ASCII for RS232. For I2C and SPI there was support for Hex, Decimal, and Binary, but not ASCII. Might just be the product manager’s assessment of user needs/wants vs NRE and production cost constraints. Personally I like ASCII decoding and would enjoy having it for most protocols along with Hex, Decimal, and Binary.
HP 4395A Screen grabber - Page 1
Forum section: electronics / testgear

author: Lexy
author_rank: Contributor
timestamp: March 10, 2022, 08:52:39 pm
content: I've made a Screen grabber for the HP 4395A Network/Spectrum/Impedance analyzer:Linkt to my github page with the sources and executables:https://github.com/Lexy1972/HP4395A_Screen_Grabber/You do need a NI compatible GPIB interface and the NI-488 drivers.Cheer and have fun with it!
Old Sanwa P-2B Restoration - Page 1
Forum section: electronics / testgear

author: TiredOldDad
author_rank: Newbie
timestamp: March 09, 2022, 08:30:23 am
content: I've got a vintage Sanwa P-2B from I think the 70's or earlier which I broke way back when I was still in middle school. It was a hand-me-down from my dad and was the first multimeter I ever owned and learned on. I recently took it out and I'm thinking of restoring it.... not to put it back into service, but to keep it as a functional memento.There two issues with it... the wiper on the zero-adjust pot has broken off and the DC voltage measurements aren't working.I can probably figure out the latter but I don't know if the pot can be replaced. It appears to be proprietary.Any ideas?