hybridfree/eevblog-posts huggingface dataset:
Thandar LA160B ROM download-Where from? - Page 1
Forum section: electronics / testgear

author: djsb
author_rank: Super Contributor
timestamp: May 26, 2023, 11:11:42 am
content: I've just bought a Thurlby LA160B Logic Analyser, and I'd like to download the EPROM firmware (including the LR-64 option ROM) so that I can have a backup. Does anyone know where I can download the firmware from? Thanks.David.PS I will need to make a backup of the EXISTING ROMS in the instrument when I receive it. So I also need to make/buy a simple EPROM reader/programmer. Does anyone have any suggestions for one that supports the EPROM used in the LA160B? This is all a bit of a whim based on finding around 6 off LA160 PODS that don't have an actual LA160 to connect to. So I've bought myself one in the hope that it will be useful/educational.

author: RR6502
author_rank: Newbie
timestamp: September 28, 2023, 07:13:43 pm
content: Hi David,still interested in the EPROM contents? I can provide you with the i.e. BIN-files (version 5.0: LA160-50 and LR64-50) if you want them. Well, actually they are out of my IE1620, but they are exactly the same.Talking about unused (data) pods: I will have soon two of these analyzers but just a single pod with the variable threshold level (IE1620-1, which is, if I'm not mistaken, the same as the LC-02). Maybe I can buy the one I don't have from you?Currently I'm still in progress with a complete reverse engineering of that analyzer and that means redrawing the PCBs and schematics. If you're interested in receiving those files just let me know.GreetingsRaimund

author: djsb
author_rank: Super Contributor
timestamp: September 30, 2023, 07:10:11 am
content: Raimund,Yes, I'm interested in ANY firmware you have for these, thanks. I recently bought an Interplex IE-1620 from the states. Problem is, it only works at 110v, so I have to use it with an external autotransformer or figure out a way to drop 240v to 110v internally. I don't have any LC-02 pods. The only ones I have are LC-01's. I would be interested in details of your reverse engineering, including any schematics and PCB layouts. Especially if they are done using KiCad. Thanks

author: adjco
author_rank: Newbie
timestamp: May 21, 2024, 11:20:58 pm
content: Hi Raimund,I have a Thurlby LA-160B. I would be extremely interested in a copy of the LR-64 50 if you could possibly send me a copy?There is a sitehttps://sonicsheep.com/Electronics/2-Thurlby%20LA160.htmlthat has details of the pods, so you can make your own.RegardsAlan.

author: djsb
author_rank: Super Contributor
timestamp: April 12, 2025, 04:52:41 am
content: Any news Progress on this? Thanks.
Tenma 72-10480 PSU dead after disabling output - Page 1
Forum section: electronics / testgear

author: jack32
author_rank: Contributor
timestamp: April 11, 2025, 05:04:13 pm
content: I have a Tenma 72-10480 PSU that just died last week. It is a rebranded Korad, I think a KA3003D.I had an LED controller and 15 metres of (still spooled) LED tape connected. The PSU was putting out 24V and about 2.3A. Then I switched off the output and at that moment the PSU died and never came back.When I switch an mains supply the 7 segments show "patterns" and nothing responds to any input. It seems to me that the uC is dead.I have done a bit of research, but have not found any cases of the controller being dead or any fixes in this direction...Is this a known problem? I have read that these units "do not like load spikes".thanks
Aneng Q1/Zoyi ZT-X black on white display - Page 1
Forum section: electronics / testgear

author: terrance
author_rank: Contributor
timestamp: April 08, 2025, 06:03:51 am
content: Did:1. peel the polarizer from the back of LCD2. flip it and stick to backlight side3. change BL resistor from 10ohm to 100ohm or larger (the "100" one near the relay, forgot to photo it), who needs BL crazily bright, someone debugging circuits in darkness?Now power consumption is about 4 mA.TODO:1. settle time issue, maybe replace the integration cap?2. found a guide to modify APO time3. viewing angle is bad, adjust the LCD bias

author: terrance
author_rank: Contributor
timestamp: April 08, 2025, 06:12:02 am
content: BL resistor should be R8

author: terrance
author_rank: Contributor
timestamp: April 10, 2025, 12:19:52 pm
content: 1. Display viewing angle/contrast. R27 10k is connecting bat+ (~1.8V) to U2 pin16, "VLCD". 10K makes this pin ~1.4V, use a very low R forces it to 1.8V, contrast still kinda low. Sourcing ~3V using another DMM's diode mode can get much better contrast. Found an 2.4V output from internal charge pump, will try that later.2. Resistance settling time: reduce C1 from 27nF to 3.3nF, makes it much faster, ~2s vs 10s. Then measuring 8V voltage results +/-1mV noise, will test mV noise later. C1 is connecting FTP and FTN, "Prefilter capacitor connection port".U1 is DTM0660, U2 ET6621S

author: terrance
author_rank: Contributor
timestamp: April 11, 2025, 01:11:15 pm
content: VLCD solved.remove R27 ("01C" 10kohm), connect U2-16 to C11 (the pad has 2.4V) directly or via a kOhm resistor.
Wanted: User manual for Xitron 2500 poly-phase power analyzer - Page 1
Forum section: electronics / testgear

author: D2236
author_rank: Regular Contributor
timestamp: April 11, 2025, 12:41:04 am
content: If someone can share a copy of this user manual, it will be greatly appreciated. No hits on an Internet search and not available on Xitron old manual downloads. The only downloads are for model numbers 250/1/2/3, which is a newer style power analyzer. Some time ago, I just missed a user manual sold on eBay for the 2500. That is the only time I ever saw the manual listed on any site.
Agilent u1233a data logger software - Page 1
Forum section: electronics / testgear

author: duzycinek
author_rank: Contributor
timestamp: April 08, 2025, 05:38:54 pm
content: Hello, I am looking for datalogger software for agilent u1233a. I searched google, but all links arw expired. Maybe someone have installer for agilent datalogger 1.5

author: shabaz
author_rank: Frequent Contributor
timestamp: April 08, 2025, 05:44:22 pm
content: I believe you're looking for this software:https://www.keysight.com/us/en/lib/software-detail/computer-software/keysight-handheld-meter-logger-software-for-pc-2470924.html(I have not tried it with U1233A, but the release notes mention support for it).

author: Tony_G
author_rank: Super Contributor
timestamp: April 08, 2025, 09:30:40 pm
content: May not be helpful to the OP but I've used that and the BT adapter with a U1253B under Win11 so you can still get it to work...TonyG

author: duzycinek
author_rank: Contributor
timestamp: April 10, 2025, 08:56:28 pm
content: Quote from: shabaz on April 08, 2025, 05:44:22 pmthank you, it solved my problem
Hitachi V-650F oscilloscope service manual - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: April 10, 2025, 05:01:07 pm
content: I found the service manual for the V-1050F which is close but not all correct. Anyone know where I can get the one for The V-650F?

author: coromonadalix
author_rank: Super Contributor
timestamp: April 10, 2025, 06:45:36 pm
content: https://elektrotanya.com/hitachi_v1050_v650f.pdf/download.htmlhttps://bama.edebris.com/manuals/hitachi/v650fI think it's the same, schematics in the bama one

author: BeBuLamar
author_rank: Super Contributor
timestamp: April 10, 2025, 07:19:08 pm
content: The one from Elektrotanya although said 1050 and 650 it's only for the 1050 and it's the service manual. The one from Bama is for the 650 but it's only the user's manual. I need the service manual to do adjustments.
[DS1230Y-120+] x-ray pictures / external battery mod  - Page 1
Forum section: electronics / testgear

author: DavidAlfa
author_rank: Super Contributor
timestamp: April 10, 2025, 10:44:28 am
content: Got a HP 54501A with exhausted nvram.It uses aDS1230Y-120+which seems completely different from other 1230s, there's only one battery inside and the soldered tabs are placed differently.At first I followedxdevs pictures, I made a hole near pin 7 by hand with a flat screwdriver, even with great care I managed to cut two traces...Not a big issue, I fixed the traces and proceeded to cook it in the x-ray machine, it had to be a different design, and indeed it was!The rest was straighforward, I soldered two wires and glued a beefy 2450 battery on top.
Serial communication with Joy-It PSG9080 - Page 1
Forum section: electronics / testgear

author: Raspy
author_rank: Newbie
timestamp: April 09, 2025, 07:50:30 pm
content: Hi!I have a Joy-It PSG9080 signal generator, and i am using if for a ham radio project. To do this i need to communicate with it from a micro processor, using RS232. I can connect with my computer to the signal generator using the USB-Serial adapter thats built in, but the program doesnt say anything about baud rate or anything about the commands to send. I have looked for programs to eaves drop on the communications but havent found any.On the backside is a TTL level port for RS232 communcation, i have tried to decode any information on the RX pin while sending commands from my computer, but it doesnt seem to work that way.Has anyone managed to communicate to the unit with RS232 directly with the 10 pin port on the back side?

author: Kean
author_rank: Unknown
timestamp: April 09, 2025, 08:13:36 pm
content: There are some open source utilities on GitHub for controlling the PSG9080 over USB.https://github.com/poehldaniel/PSG9080https://github.com/qrp73/PSG9080_ARBI have not tried them myself. I presume the JoyIY and Juntek PSG9080 are software compatible.If you were to use the JoyIT Windows software, the USB interface is provided via a CH340 USB to UART converter so you should be able to connect to the internal UART pins to sniff the protocol.Also, see the comment in this post about there being a protocol document available within the software install ZIPhttps://www.eevblog.com/forum/testgear/juntek-psg9080-programmable-signal-generator-(80-mhz-300-msas-14-bit)/msg5857481/#msg5857481Edit: I've attached the protocol specification document

author: tooki
author_rank: Super Contributor
timestamp: April 09, 2025, 08:55:44 pm
content: Quote from: Raspy on April 09, 2025, 07:50:30 pmJust a little bit of technical pedantry: RS-232 defines, among other things, voltage levels that are entirely different from TTL:TTL: 0…0.8V for logic 0, 2…5V for logic 1RS-232: positive (+3…+15V) for a logic zero and negative (-3…-15V) for a logic 1 on the data lines, but the opposite on control lines.So a serial connection cannot be TTL and RS-232 at the same time.What you mean instead of RS-232 is “UART”.
Siglent SDS804x how to connect to Windows PC ? - Page 1
Forum section: electronics / testgear

author: RonPhilips
author_rank: Newbie
timestamp: April 09, 2025, 01:24:26 pm
content: I have a Siglent SDS804x oscilloscope but i cant seem to get it to connect with my Windows 10 PC. In device manager it is missing a driver. So i go to Siglent's Website and they dont have a driver there for the SDS800 series. Since a usb cord came in the box, surely it does support connecting to a computer with Siglent's SigScopeLab software? Can anyone help? Have anyone done it before? Or is it LAN only? Then why the usb cord in the box?

author: coromonadalix
author_rank: Super Contributor
timestamp: April 09, 2025, 02:03:27 pm
content: the usb is normally used for scpi commands, for my Siglents i installed Rhode Schwartz visa drivers ... and with them you have a 32 and 64 bit tools you can use to send commands, and or tests a few things ...as for the lan it is the same for scpi command and or web page access if there is one, just a matter of setting the right parameters for your networkyour pci communications errors should be your pc hardware missing some driversthe other is your scope for sure, and installing visa drivers should help to identify it in windows

author: tautech
author_rank: Super Contributor
timestamp: April 09, 2025, 07:35:01 pm
content: Quote from: RonPhilips on April 09, 2025, 01:24:26 pmWelcome to the forum.Connect LAN.Tap or click on the LAN symbol and either allow it to find your LAN or assign and enter the IP.Open a browser tab and enter the scopes new IP.This is the simplest type of connection, that is using the scopes inbuilt webserver and a PC browser.Only a LAN connection is required.There is other connectivity options however none are as powerful as the inbuilt webserver.EasyScopeX requires NIVISA Runtime drivers for USB or LAN connectivity.The USB cable (USB-A to USB-B) is used for quick seamless connection to any Siglent AWG for the scope to take control of it to provide the sweeps for Bode plot (FRA).
Looking for info on General Radio 1491-9000 Inductance Decade Box (for sale) - Page 1
Forum section: electronics / testgear

author: belba
author_rank: Contributor
timestamp: April 09, 2025, 08:35:59 am
content: Hi everyone,I'm trying to gather more information about a rather uncommon piece of test equipment:aGeneral Radio Inductance Decade Box, model 1491-9000.I haven't found any technical documentation or specs for this exact model online – only references to related models like the 1491-G or 1491-B.I’ve already contacted IET Labs, but haven’t received a response yet. Maybe someone here has more insight?I'd be particularly interested in:The approximate production yearsIntended use / application contextAny technical specifications or original datasheets/manualsCalibration accuracy (if known)I’ve attached a couple of pictures for reference. The unit appears to be in good visual condition, and I’ve done a basic functionality check using a hobby-grade LCR meter – the results were consistent with the front label values (within the limits of the tool).Also, I do plan tosell this unit, so if someone here is interested (or knows someone who might be), feel free to message me.Thanks in advance for any help or info!Best regards,Guido
Display multiple recorder traces on a Siglent SHS820x  - Page 1
Forum section: electronics / testgear

author: cncjerry
author_rank: Unknown
timestamp: April 08, 2025, 12:16:16 am
content: I can't figure out how to show more than one trace in either the meter or scope recorder on the SHS820x even though the trace button shows options for up to four traces. I checked the manual and it doesn't seem to cover this at all. I'd like to run a recording and then have it recalled while running another trace on top of it.thanks

author: tautech
author_rank: Super Contributor
timestamp: April 09, 2025, 12:44:03 am
content: Sorry been busy....Use a Reference trace which you access from the Save/Recall menu.Save the Ref trace then it's available to recall at any time.You should be able to save a few to local memory and then recall each at will and an unlimited # can be saved to external memory.Use the File Manager feature to name them all...

author: cncjerry
author_rank: Unknown
timestamp: April 09, 2025, 03:36:42 am
content: thanks Tautech, but I still don't get it.1) Selecting trace2, for instance on the recorder or hitting the recorder function key in meter mode, displays two traces, both in this case, DCV. So I get two traces across the display, one above the other, both the same after starting the recording.2) "Reference" as in a Ref trace, doesn't work in recorder mode. So I don't see a way to keep a ref trace on the display.3) recalling a trace and then hitting start (to record another trace) just clears the display and shows another fresh trace.I have other ways to do this, just thought it would be interesting to do it on the meter's display. Must be still missing something.Thanks
Agilent 34410a or Fluke 8845/DMM4050 - Page 1
Forum section: electronics / testgear

author: Ahax
author_rank: Newbie
timestamp: April 08, 2025, 04:37:24 pm
content: Hello, I'm looking to get my hands on a good bench meter, I've narowed it down to the Agilent 34410a and the Fluke 8845a/DMM4050. All meters are about the same price on ebay, and from rreputable selers. Anybody have experience with these meters? How is it with replacement and spare parts? And the general performance... Personaly I'm leaning towards the 8845/4050, but synce in new to bench meters some feedback would be apriciated, thanks.Kinds regards.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 08, 2025, 05:11:16 pm
content: i can vouch for 34410a, no problems, fast booting, only a vfd to change (clones exists) lan usb gpib but basic display in a sense vs the more complicated oneon the 8845 8846, when it fails it is more difficult to repair34410a schematics floats on the web, same ones for the 34411a (faster samplings) or the keypad less L4411A, the other Flue or Tek, not to my knowledgeyep i admit the small 34410a fan is slightly annoying, a small hisssssFor Fluke / TEK i mostly hear and saw connectivity / network problems on the 8845 8846, as for repairs ... it's possible to some extent,as for both, there is some custom made sw shown here, who can help for logging and long term use(s)Keysight is a pain in the @#%!@ for their now licensed bench vue, you can still use the old dmm software with specific i/o librairies and or simpler visa drivers like R&S Visa ...Fluke i don't know, i think there was one at some point ? others may chime into choose between the 2, i'm going HP Agilent, and absolutely avoid 34461 34465 .... mcu problems and others, the black series are / seems less prone to problemswe have began to use the Siglent 6.5 digits, seems fine so far.my 2 centssome 34401a can be found at very low prices, the absurd prices are still there on some, but i saw a few very low priced and in very good shape, but less connectivity (no lan), spare vfd's exists, schematics too.

author: bdunham7
author_rank: Super Contributor
timestamp: April 08, 2025, 06:03:53 pm
content: If you opt for the Fluke/Tek model then get a nice one and avoid anything that shows any signs of physical abuse, wear or heavy use. Repairs are not easy and if physically or electrically abused they may not be possible.I have no experience with the 34410A and I don't know what features are important to you, so IDK whether to try and convince you to go with a later model 34401A instead.

author: KungFuJosh
author_rank: Super Contributor
timestamp: April 08, 2025, 06:19:49 pm
content: Quote from: bdunham7 on April 08, 2025, 06:03:53 pmBetween those two, the 10A is superior and includes LAN. Other benefits are listedhere.Of the units listed by the OP, the 34410A is the only one I would consider personally.
Waverunner 610 zi freezing/crashing on auto trigger - Page 1
Forum section: electronics / testgear

author: yoyobob24
author_rank: Contributor
timestamp: April 08, 2025, 10:23:39 am
content: Hi everyone, I was curious if anyone has ran into the issue in which if I set the trigger to auto it works for a few mins and then immediate crashes. I have updated to the newest firmware and it did not fix it. I just recently got the scope for a steal from local place and they said if it still doesn't work I can take it back. Any advice? or on these nicer 1 ghz scope I shouldn't be having the scope running on auto all the time unless I'm actually measuring? I just upgraded from a siglent SDS804X.
EasySpectrum to access SSA3021X what (minimal additional) software to install ? - Page 1
Forum section: electronics / testgear

author: paulvo
author_rank: Newbie
timestamp: April 07, 2025, 12:22:35 pm
content: The documentation forhttps://siglentna.com/operating-tip/getting-started-easyspectrum-software/is mentioning to install the VISA Runtime Engine.The link provided is however returning the general portal for NI.I am a non-commercial user, and wish to install only the bare necessities in order to be able to use my SSA3021X using EasySpectrum over the LAN.A first attempt had installed far too many utilities, versions and packages. Including the 32-bit and 64-bit runtime versions of LabVIEW.After that, EasySpectrum worked, but after a few seconds connection with the SSA3021X during which I could see the exact contents of the display, a warning occurred "One instrument is disconnected". On other occasions (most of the times actually) the error was showing up "Can not open this visa Session".Can anyone advise me what precisely I need to install ?I now have the empty NI Packet Manager, but I don't know what exactly to install.

author: tautech
author_rank: Super Contributor
timestamp: April 07, 2025, 08:14:37 pm
content: The EasySpectrum V6.6 Install instructions is clear on the SW requirements with NI-VISA Run-Time Engine 5.4 the minimum required for the connectivity drivers.https://int.siglent.com/upload_file/zip/software/Spectrometer/EasySpectrum_V1.0.6.6_EN.zipNI-VISA Run-Time Engine 5.4 is not so easy to find but it is online if you take the time to ferret it out.Some ~100MB is much more attractive than a full 500+MB NIVISA install.

author: bte
author_rank: Regular Contributor
timestamp: April 08, 2025, 12:30:02 am
content: Quote from: tautech on April 07, 2025, 08:14:37 pmThis was the second link in the google search for NI-VISA Run-Time Engine 5.4. The binary is about 73MB and the digital signature on the exe is "National Instruments Corporation".https://ni-visa-runtime.software.informer.com/5.4/The software is from 2013. I don't know what kind of machine OP uses but it may not work well with the latest windows 10/11 machines.EDIT: The first link to my search washttps://www.ni.com/en/support/downloads/drivers/download.ni-visa.htmland I ignored that since I thought the old versions were not available based on the quoted comment. It turns out the runtime is available directly from NI. One needs to select V5.4 or V5.4.1 from the menu and then select "runtime" instead of "full" from the "included editions" menu.
Dataman 48XP UXP Upgrade kit? - Page 1
Forum section: electronics / testgear

author: perdrix
author_rank: Frequent Contributor
timestamp: April 06, 2025, 10:27:29 am
content: The kit adds USB support to the these programmers.They were made by Adventech (Labtool-48), and also sold as the Logical Devices Chipmaster 6000.Does anyone have the USB upgrade kit for this?ThanksDavid

author: coromonadalix
author_rank: Super Contributor
timestamp: April 07, 2025, 01:10:56 am
content: try to search the odm variants chipmaster 6000 uxp labtool 48 uxp ... not even sure this kit exist anymore ...at AEC :http://www.aec.com.tw/LT-48UXP-UpgradeKit.htmdataman infos :https://forum.dataman.com/viewtopic.php?t=61311and normally the price is a good deterent .... better find any variant in the UXP form ... alas they don't come cheap way overpricedand for all variants, the 8.32 software is the last free version, you need to pay a 2 year licence to go up to v11 or higher

author: Gyro
author_rank: Super Contributor
timestamp: April 07, 2025, 01:14:49 pm
content: It would almost certainly be cheaper to buy an old parallel port Dell or IBM Thinkpad (T42 or earlier) laptop and put Win98 or XP on it. It does just about work with XP, just fails to connect on first run. That's my approach for old parallel port stuff.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 07, 2025, 03:39:30 pm
content: you have an usp2lpt adapter who could / may work ....https://www.vogons.org/viewtopic.php?t=57919based on usb fx2 cypress chip

author: Gyro
author_rank: Super Contributor
timestamp: April 07, 2025, 05:10:09 pm
content: I remember building and trying the AVR based one back in the day. I can't remember now whether the Dataman was detected, or was just too slow (stated 10-100x speed reduction irrc), it didn't work for me anyway. I hadn't tracked progress and noticed the faster FX2 version. It might be a possibility.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 07, 2025, 06:22:12 pm
content: there is a faster fw and a basic one ....
FLUKE 43 POWER ANALYZER - Page 1
Forum section: electronics / testgear

author: mainman
author_rank: Regular Contributor
timestamp: July 13, 2017, 05:13:34 am
content: Hi what is the difference between the fluke 43 and fluke 43b power analyzer. Can the fluke 43 also measure AC and DC too.

author: J.Macedo
author_rank: Newbie
timestamp: April 07, 2025, 06:50:27 am
content: Hi:Maybe it doesn't matter anymore, but there will always be some clueless people!!!(I'm also new and want to contribute)and this might help in the futureI was lucky enough to acquire one of these items at a good price and had to do some research ("in-depth")Since my device is a 43, some details came out and had to be corrected (if you're wondering, it was its aftermarket display and battery, and corrected the wiring).And broadly speaking, the difference between the 43 and the 43b are improvements in the hardware; the software is practically the same.The 43b improved in:* Redesign of its PCB (minor but useful).* An increase in screen memory (screen capture) from 10 to 20 (I don't know if it's due to the use of a chip with more KB or if they simply discovered that they weren't using all the memory and freed it up).* The ability to handle new chemistry batteries, i.e., Ni-Cd ---> HM-NiAnd in its accessories, the replacement of the ammeter probe. 80i-500S ---> i400s (which improved almost 60% in reliability)and maybe and maybe using a db-9 to usb IrDA optical cable.Other than that, everything remains the same.But for your convenience (anyone), I've attached the technical manuals for the 43 and 43b in case you want to review them yourself.Regards.
Help with SCPI Scripting and Normalize Display – Keysight N5230C VNA (phase comp - Page 1
Forum section: electronics / testgear

author: ak47
author_rank: Newbie
timestamp: April 06, 2025, 06:19:04 pm
content: Hi everyone,I'm working on a Python project using PyVISA + GPIB to remotely control a Keysight (Agilent) N5230C Vector Network Analyzer.🔧 **Project goal:**I'm measuring S21 across several antennas/devices and want to compare their **phase response** to a reference device. Ideally, I'd like to:1. Use the VNA's internal **Normalize (Data/Mem)** function and show the delta phase on screen in real-time2. Or collect `CALC:DATA? SDATA`, extract phase (using atan2), and compute differences in Python---🧱 **What I’ve done so far:**- I can collect raw complex SDATA and calculate phase manually in Python using `math.degrees(atan2(imag, real))`- I’ve tried SCPI commands like:But I don’t see proper normalized phase on the VNA display.- I also tried:→ got error **-113 Undefined Header** (realized it's not supported on the N5230C)- I previously got error **-420 Query UNTERMINATED**, which I fixed by ensuring all queries had a matching `.read()` or used `.query()`---❓ **What I need help with:**- How do I properly enable **Normalize phase display** on-screen for comparisons in the N5230C?- Can anyone share a working SCPI sequence that:- Stores current data to memory as reference- Enables normalized (Data/Mem) view- Shows updated phase display for each new DUT in relation to that reference?Any insights, examples, or even screenshots from your own workflow would be super helpful. Thanks in advance!def init_instrument():instrument.write("*CLS")instrument.write("SYST:PRES; *OPC?")instrument.read()instrument.write("CALC:PAR:DEL:ALL")instrument.write("CALC:PAR:DEF 'TestTrace', S21")instrument.write("CALC:PAR:SEL 'TestTrace'")instrument.write("DISP:WIND1:TRAC1:FEED 'TestTrace'")instrument.write("FORM:DATA ASCII")instrument.write("CALC:FORM POL")instrument.write("SENS:FREQ:START 150e6")instrument.write("SENS:FREQ:STOP 600e6")instrument.write("SENS:SWE:POIN 801")instrument.write("INIT:CONT OFF")def single_sweep_get_phases_deg():instrument.write("INIT; *OPC?")instrument.read()data = instrument.query_ascii_values("CALC:DATA? SDATA")phases = [math.degrees(math.atan2(data[i+1], data)) for i in range(0, len(data), 2)]return phasesdef normalize_reference():instrument.write("CALC:PAR:SEL 'TestTrace'")instrument.write("CALC:MATH:FUNC DIV")instrument.write("CALC:MATH:MEM")instrument.write("CALC:FORM PHAS")

author: Miek
author_rank: Regular Contributor
timestamp: April 07, 2025, 07:54:09 am
content: I don't have the same model to test on, but I can test on an E8803A which should be reasonably similar.Running the code you've posted works for me except for one thing: you need to send CALC:MATH:MEM to store some trace data before trying to enable CALC:MATH:FUNC DIV otherwise it'll throw an error.
GW Instek PPH-1503 calibration？ - Page 1
Forum section: electronics / testgear

author: Wade2019
author_rank: Contributor
timestamp: July 10, 2019, 06:23:54 am
content: My PPH-1503 accuracy is declining and I can't find its calibration from Google. Can anyone help me?

author: coromonadalix
author_rank: Super Contributor
timestamp: July 10, 2019, 06:32:32 am
content: Did you ask GW Instek ?

author: Wade2019
author_rank: Contributor
timestamp: July 10, 2019, 06:47:39 am
content: Quote from: coromonadalix on July 10, 2019, 06:32:32 amThe answer from GW Instek is that it needs to be returned to the factory for calibration.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 10, 2019, 08:16:52 am
content: Damn hope you find a solutionYou have Lan, Usb and gpib, must be an similar or brother look a like smae serie psu, whos been calibrated by someone ??Maybe with the usb and with an terminal software you can see some info while the psi is booting ?

author: nctnico
author_rank: Super Contributor
timestamp: July 10, 2019, 11:06:51 am
content: Quote from: Wade2019 on July 10, 2019, 06:47:39 amThat seems like a logical answer to me. Sending equipment back for adjustment / calibration is the usual way.
Xgpro Universal Programmer AT25SF041 Vs AT25SF041(OTP) - Read Memory - Page 1
Forum section: electronics / testgear

author: 2X
author_rank: Frequent Contributor
timestamp: April 05, 2025, 05:07:03 pm
content: Hello,what is the difference between the SPI Serial Flash Memory AT25SF041 Vs AT25SF041(OTP). I saw in the datasheet (page 20) of the memory that the OTP "protect the security registers". What are the security registers and what I have to select between the AT25SF041 Vs AT25SF041(OTP) in order to read the contents of the memory?AT25SF041 Datasheet:https://www.renesas.com/en/document/dst/at25sf041-datasheet?language=en
Owon XDM Multimeters - Nicer PC application - Page 1
Forum section: electronics / testgear

author: markusdd
author_rank: Contributor
timestamp: April 06, 2025, 10:47:30 pm
content: I just felt this might be interesting for some of you. I own an Owon XDM1041 and I am pretty happy with it, amazing 'bang for buck' actually, as it even comes with SCPI over USB, and all that for under 100€.Problem is: The included PC application is not really good and having to install that whole NI VISA thing etc. ... yeah I am not a fan. And it's Windows only.So I got going and made my own, including graphing capability. It's written in rust with egui - an immidiate UI framework. Which is nice because you can now regulate the graph refresh independent of the actual measurement data coming in, making it very smooth.Right now you can switch to all modes, ranges, control the beeper and the beeper threshold in continuity mode. (for Diode mode threshold adjustment does not work yet and it might never, unless there is an SCPI command for it, any hints appreciated).https://github.com/markusdd/rusty_meter/tree/masterI provide binaries for all 3 major OSes in the release section, you can also build yourself. You do NOT require VISA for this to work, under Windows you might need to install the CH340 USB serial driver, but most people will have that installed anyway in this forum I guessMaybe this is useful for someone, hope you like it. Issues can be posted directly on Github, we can also discuss feature requests there - or here.Cheers.
UNI-T UT139A modified to use a 32 mm fuse instead of a 25 mm fuse - Page 1
Forum section: electronics / testgear

author: nitro2k01
author_rank: Frequent Contributor
timestamp: April 05, 2025, 04:27:22 pm
content: This is a cheap UNI-T UT139A multimeter. It had a blown 10A fuse, but I couldn't find any 6 mm diameter, 25 mm long fuses with the right current and voltage rating for sale anywhere, only 32 mm ones. The board clearly had provisions for this situation since there was an extra hole so the holder could be in one of two positions. So I moved over one of the fuse holder clips and the 10 A range is back to working. Not a groundbreaking hack, but I haven't found this mod documented anywhere online so here goes.
Keysight EXA vs MXA YTF - Page 1
Forum section: electronics / testgear

author: dxl
author_rank: Regular Contributor
timestamp: April 04, 2025, 07:32:39 pm
content: Hi,does anyone know whether the EXA vs MXA YIG is really different betweenthe two units?MXA has 5087-7828EXA has 5087-7382Everything else seems to be the same - the Attenuator has only 60dBrange on EXA, while it has 70dB on MXA, but that's just a softwarelimitation. Same for the Preamp - EXA seems to offer only P03 whichis the 3GHz option. But P26 also works on EXA when providing the missinglicense + calibration data.I changed the device type of the EXA to be a MXA, and the analyzer booted up saying it'san MXA without any error.So i wonder whether the better performance is mostly the YIG, or whether i missed someparts that are different.
Tektronix 577 d1 questions - Page 1
Forum section: electronics / testgear

author: Bargainhunter
author_rank: Regular Contributor
timestamp: March 29, 2025, 03:05:29 pm
content: I have a few questions.I received a Tektronix 577 D1 storage curve tracer without a CRT.Can anyone tell me the model number of a replacement CRT? Also is there a substitute? Where can I find one?The service manual lists 154-0634-00 and 154-0634-10 but I also read somewhere that it uses a 154-0633-10.Also does the D1 and D2 use the same CRT.Any help would be greatly appreciated.

author: Greybeard
author_rank: Frequent Contributor
timestamp: April 03, 2025, 10:13:38 pm
content: https://www.eevblog.com/forum/buysellwanted/wanted-crt-for-tektronix-577-d1-curve-tracer/msg5869955/#msg5869955One thread is enough.
How "magic" is the Fluke 279 FC charger? - Page 1
Forum section: electronics / testgear

author: klausman
author_rank: Regular Contributor
timestamp: March 24, 2025, 03:41:34 pm
content: So I have a chance to buy a Fluke 279 FC for relatively cheap. It has a proprietary-ish battery and normally comes with a charger for that. Now one of the reasons why this meter is cheap, is that the seller has lost the charger (hooooow?? how do you do that?), so it would come without. The question now is: is buying a new charger from Fluke ($$$) the only option? Or would a random wall wart with the right voltage/current and plug work?

author: Everett_Tom
author_rank: Contributor
timestamp: April 03, 2025, 03:10:29 pm
content: Random wall wart with the right plug size, polarity, voltage and the same or higher current rating would be fine.

author: BeBuLamar
author_rank: Super Contributor
timestamp: April 03, 2025, 04:15:13 pm
content: Fluke sells the BC500 AC charger. It goes for something like $150 to $230. Ebay sells generic one for like $25. I don't think the charger is magic, it's just a power supply, the charging control circuit is inside the battery I think. The company that I used to work for has one of those and I really hate to use it because whenever I need to use it the battery is dead. I can fully charge the battery before I put it away and when I need it the battery is dead.
Noise on Rigol DM858 - Page 1
Forum section: electronics / testgear

author: felipesevilhano
author_rank: Newbie
timestamp: February 07, 2025, 08:48:12 pm
content: Hello everyone at EEVblogFirstly, I'm sorry for the English, I'm Brazilian and I'm using a translator.I recently purchased a Rigol DM858 from an authorized Rigol dealer. The equipment is working properly, but I noticed a high-pitched noise coming from the power connector.I have already exchanged the equipment for another of the same type and the same behavior occurs.Just be connected to the power supply and the noise appears (Even in standby).If the environment is silent this ends up bothering me and I need to unplug it.I am attaching an audio I recorded.Model: DM858Hardware Version: 01.01Software Version: 00.01.00.00.20System Version: 1.5.3Does anyone have any idea what it could be?Thanks!

author: Kean
author_rank: Unknown
timestamp: February 08, 2025, 03:52:33 pm
content: I can only just hear it with headphone and max volume. An FFT on the audio shows a peak at about 8800Hz.I don't know the design, but that is kind of a low frequency for a modern buck converter.Maybe a capacitor is vibrating due to piezoelectric effect, or power supply noise coupling into a speaker/buzzer.

author: felipesevilhano
author_rank: Newbie
timestamp: February 12, 2025, 09:44:31 am
content: Hello, thanks for your help.I measured it with my cell phone and it really seems to be an 8.8Khz noise.I opened the equipment and identified that the sound seems to be coming from this DC-DC converter.I found a video on YouTube about a German who had the same problem. I believe it may be a problematic batch

author: KPbICKA
author_rank: Newbie
timestamp: March 07, 2025, 09:26:51 pm
content: Quote from: felipesevilhano on February 07, 2025, 08:48:12 pmI have same problem with new Rigol DM858

author: hp3310a
author_rank: Regular Contributor
timestamp: March 07, 2025, 09:42:43 pm
content: Quote from: felipesevilhano on February 12, 2025, 09:44:31 amI recently had the same kind of problem with a different device type (electronic load) and it turned out to be caused by ceramic capacitors that surround a DC- voltage converter. It operates at 10kHz and so the capacitors can emit extremely annoying noise at audible frequencies. Replacing the capacitors (https://www.eevblog.com/forum/testgear/brand-new-et5410-emits-high-pitch-noise/msg5821403/#msg5821403) with electrolytics fixed the problem almost completely.

author: felipesevilhano
author_rank: Newbie
timestamp: April 02, 2025, 09:22:18 pm
content: I contacted Rigol Brazil and they informed me that the product is within the noise specifications and they could not do anything about it. They only offered me a discount on future purchases of Rigol products.
Anritsu ML4803A - Page 1
Forum section: electronics / testgear

author: ct2iok
author_rank: Newbie
timestamp: April 02, 2025, 03:48:37 pm
content: Good afternoon, I bought an Anritsu ML4803A equipment in the USA, this model comes to work with AC 115V, according to the manual can be configured to 220V, changing the settings of the transformer taps, please someone has this information that can share, thanks in advance

author: picburner
author_rank: Frequent Contributor
timestamp: April 02, 2025, 04:32:19 pm
content: Apply 115V to the instrument and measure the voltage between terminal 1 and terminal 4.If there is 230V you have the answer.Be careful though that there are 4 wires: Do two of them power a 115V fan?If so you must leave the fan wires connected between 1 and 3.
Transformer testing with a LCR meter - Page 1
Forum section: electronics / testgear

author: chilternview
author_rank: Frequent Contributor
timestamp: March 30, 2025, 08:34:53 am
content: So I tried testing a transformer with my new TH2827C and the TH26038 transformer test fixture. Connected up an small transistor output stage transformer with a 1:1 primary-secondary ratio. As per the instructions the primary was connected to Hpot (A) and Lpot (common), the secondary to Hcur (B) and Lcur (common) of the test fixture.When I switch to L2A / L2B measurement settings, the lcr meter internal relays start clicking about twice per second and don't stop. And with the 1:1 transformer I see a high inductance (some 25H) and turns ratio N of 0.1. This doesn't seem right at all.Has anyone else managed to successfully measure a transformer?

author: timeandfrequency
author_rank: Frequent Contributor
timestamp: March 31, 2025, 03:17:57 pm
content: Hello chilternview,Did youringyour transformer to verify its' health before measuring it with the LCR meter ?

author: chilternview
author_rank: Frequent Contributor
timestamp: March 31, 2025, 05:28:39 pm
content: No, but I did check several different transformers, also the relay clicking happens when you select the L2A/L2B tests without anything connected.The meter is giving correct inductance and series resistance values, however its reporting a turns ratio of 0.1 not 1. I'm wondering if the clicking is normal (to measure both primary and secondary consecutively) ?I've contacted the cz-ckt.com manufacturer, hopefully they will reply.

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: March 31, 2025, 05:54:06 pm
content: I am not familiar with the equipment you are using, thus I ignore whether the test frequency can be changed or not. But if so, try the next higher frequency available.

author: chilternview
author_rank: Frequent Contributor
timestamp: April 02, 2025, 08:25:38 am
content: Quote from: UnijunctionTransistor on March 31, 2025, 05:54:06 pmYou're spot on, thanks! I had assumed that for what is a small audio transformer, any frequency in the audio range would give sensible results. The inductance of one winding varies from ~2H at 100Hz to 750mH at 1KHz. Presumably the turns ratio being reported as 0.1 at 100Hz is because of losses?
Korad KA3005DS Inrush Current - Page 1
Forum section: electronics / testgear

author: hgryska
author_rank: Newbie
timestamp: March 30, 2025, 09:28:53 pm
content: I just received a brand-new Korad KA3005DS power supply. It is the facelift model with the 3rd display for power. First impression isn't bad. The fan is temperature controlled and its noise level is ok. But I am just wondering that you can clearly hear a 'zonk' noise when switching on the mains switch. It comes from the transformer windings building up the magnetic flux at startup. Is this normal for the Korad devices? AS this is stressing the transformer windings on the long run, has anyone thought already about adding an inrush current limiter to avoiod this?Many thanks for any comment or recommentdation

author: hgryska
author_rank: Newbie
timestamp: March 31, 2025, 09:04:34 am
content: After some more experiments I found out that the noise is caused by case vibrations during magnetic flux build up. In this case an inrush current limiter would be an overkill and I will just dampen the metal sheet with Alubutyl mats.

author: SHF
author_rank: Regular Contributor
timestamp: March 31, 2025, 03:45:42 pm
content: Hello, I have 2 such power supplies, the solution is --> loosen the transformer screws and put decoupling rubber between them and then slightly tighten again

author: ondraN
author_rank: Regular Contributor
timestamp: April 02, 2025, 08:27:40 am
content: I have two older KA3005D and they both do this too. After a while I learned to ignore it

author: hgryska
author_rank: Newbie
timestamp: April 02, 2025, 08:58:43 am
content: Quote from: SHF on March 31, 2025, 03:45:42 pmMany thanks. My power supply is quiet now too
tinysa ULTRA+ expert config - Page 1
Forum section: electronics / testgear

author: phenol
author_rank: Regular Contributor
timestamp: March 15, 2025, 08:48:57 am
content: Has anyone gotten into the EXPERT CONFIG > INTERNALS menu yet? Looks like older models have mixer drive level options available there, but in ultra+ the menu is locked with a password.

author: cte
author_rank: Regular Contributor
timestamp: March 15, 2025, 05:59:07 pm
content: try 5432

author: phenol
author_rank: Regular Contributor
timestamp: March 15, 2025, 09:41:38 pm
content: thanks, it works

author: DaneLaw
author_rank: Frequent Contributor
timestamp: March 15, 2025, 11:13:48 pm
content: A glance at some of the settings. (thx cte)

author: phenol
author_rank: Regular Contributor
timestamp: March 16, 2025, 07:24:22 pm
content: oddly enough, nothing is selected in the mixer drive menu. 0-3dbm seems low for a level 13 mixer (ade-25mh)

author: cte
author_rank: Regular Contributor
timestamp: March 16, 2025, 10:17:20 pm
content: By reading the source code... I think the value set in the mixer drive menu (0...3) is written to DB3/DB4 of register 4 of an Analog DevicesADF4351chip. Seems like the labels in the menu are not correct. Datasheet shows -4dBm / -1dBm / +2dBm / +5dBm. (it's not my source code, so I might be totally wrong)https://github.com/erikkaashoek/tinySA/blob/aa78ccc1cd9117840f09b7ac7ea3ceeb5d47ca53/ui.c#L2573https://github.com/erikkaashoek/tinySA/blob/aa78ccc1cd9117840f09b7ac7ea3ceeb5d47ca53/sa_core.c#L4499https://github.com/erikkaashoek/tinySA/blob/aa78ccc1cd9117840f09b7ac7ea3ceeb5d47ca53/si4468.c#L428

author: phenol
author_rank: Regular Contributor
timestamp: March 17, 2025, 07:20:56 am
content: I think the ultra+ model has a different synthesizer, a Maxim part. the Imsai guy did a teardown on YouTube

author: Jeroen3
author_rank: Super Contributor
timestamp: March 17, 2025, 07:30:22 am
content: @cteThere is a password on the expert menu so youRTFMbefore using these features because there are serious caveats.

author: hugen
author_rank: Newbie
timestamp: April 03, 2025, 01:13:02 am
content: Do not attempt to modify the mixer drive level of the ultra+. The ultra+ uses a higher gain and flatter LO amplifier than the ULTRA for higher frequency mixer drive, increasing the mixer drive level may saturate the LO amplifier producing a large amount of spurious signals.Use the default AUTO option to ensure that the LO amplifier operates in the linear range and that the LO signal amplitude into the mixer is stabilized in the effective range of +10dBm to +14dBm.
Hantek DSO2D15 scope doesn't recognize USB thumb drive - Page 1
Forum section: electronics / testgear

author: johnmeyer
author_rank: Newbie
timestamp: March 30, 2025, 09:15:19 pm
content: I just purchased this scope. It works fine, but will not recognize any thumb drive. It has firmware 3209.1. I have tried multiple thumb drives.2. I have tried 16, 32, & 64 MB.3. I have tried FAT32 (for the smaller drives) and exFAT.4. I have turned the scope off and then back on in order to reboot.When I first tried this, the exFAT thumb drive was recognized, but the scope kept giving me a repeating alert "disk recognized' and this alert (along with the annoying beep) wouldn't go away. When I tried to save something to that drive, nothing was saved. I then turned the scope on and then off in order to get rid of the alert and to be able to try various different thumb drives with different formatting, and since that point absolutely nothing is recognized, including the original drive.I have pressed "default setup," but that doesn't help.The rear USB port does appear to work. I briefly installed the drivers and software on a laptop and was able to connect to the rear USB port and look at the scope waveform on my PC. I then uninstalled everything because that software is completely useless and I didn't want it on taking up space on my computer.Is this a known problem with this version of firmware? I don't think there is a later version, although if there is, I'd love to try it.

author: johnmeyer
author_rank: Newbie
timestamp: March 30, 2025, 09:38:52 pm
content: OK, probably a cold solder joint. I wiggled each thumb drive and eventually they were recognized.BTW, I found that the beeping, which couldn't be turned off (not even in the utility menu) happened when I tried connecting an exFAT drive. When I finally got it working, and used a FAT32 drive, no beeping. That limits me to 32 GB, but that will be OK for now. exFAT definitely does not work. I didn't try NTFS.Since the scope is new and since wiggling the drive works for now, I won't bother to re-solder the USB header (probably pretty tough to get to).P.S. This is the waveform I was trying to save. It's from an old Tripp-Lite UPS that I sometimes use during blackouts, since it is a self-starter. I will now no longer use if for anything other than for lights (and I'm not sure that an LED bulb will be happy with this). Yes, folks, this is a "modified sine wave." Ugh!