hybridfree/eevblog-posts huggingface dataset:
seek　Lecroy wavesurfer 64xs circuit schematic - Page 1
Forum section: electronics / testgear

author: xiangwang137
author_rank: Newbie
timestamp: February 16, 2023, 10:09:37 am
content: My wavesurfer 64xs meter is broken, which friend can provide Lecroy wavesurfer 64xs circuit schematic, thank you very much

author: coromonadalix
author_rank: Super Contributor
timestamp: February 16, 2023, 11:24:42 am
content: You surely know it may be impossible to get ...

author: Wade2019
author_rank: Contributor
timestamp: February 16, 2023, 12:05:11 pm
content: are you serious ？？？

author: Momchilo
author_rank: Regular Contributor
timestamp: February 16, 2023, 12:36:22 pm
content: The last available schematics are for the Wavesurfer 500 series. For the later models there are no official or unofficial schematics available.There is basically no way to get them. The best chance would be to bribe an employee

author: coromonadalix
author_rank: Super Contributor
timestamp: February 16, 2023, 01:15:23 pm
content: I'm serious lollgood luck
Wavetek Model 270 Schematic??? - Page 1
Forum section: electronics / testgear

author: JLBolinger
author_rank: Newbie
timestamp: February 15, 2023, 08:38:31 pm
content: Just joined the forum here.I have a Wavetek Model 270, 12 MHz function generator.I think something in the final amplifier stage blew as the sinewave output is clipped.Also, there is 60Hz hum on the +5v power line.Does anyone know where I can get a service manual for this thing, or at least a schematic?
MSOX4104A touch screen calibration - Page 1
Forum section: electronics / testgear

author: Oddball_85
author_rank: Newbie
timestamp: February 16, 2023, 11:10:56 pm
content: Does anyone know how to calibrate the touch screen on a Keysight MSOX4104A? I called Keysight support and they apparently can't answer the question unless I register with them and create a case ID. Seems like a pretty straightforward question, but I can't find the answer to it anywhere in the service or user manual. Please help, thanks!

author: TheSteve
author_rank: Unknown
timestamp: February 17, 2023, 04:17:33 am
content: I've never seen any touch screen cal for the 3000t series or the 4000 series. I've also never heard of it being required.
PM 2517E and X Philips 1970's true RMS, auto ranging 4 digit multimeters - Page 1
Forum section: electronics / testgear

author: adinsen
author_rank: Regular Contributor
timestamp: February 15, 2023, 07:06:31 am
content: I bought a working Philips 2517E and a 2517X with damaged LCD a few days ago from a woman whose late father had kept them in his home lab. These are true RMS, auto ranging hand held 4 digit multimeters from the late 70's - very advanced for their time!An article in thePhilips Technical Review publication from 1978describes the multimeters in detail including the custom bipolar and CMOS chips Philips designed for these meters.My initial checks show me that the PM 2517E works fine. Calibration is good comparing with my Fluke 8060A. There are five axial 22uF/10V electrolytes in the power supply none of which seems to be leaking, but I will replace them as soon as I received new ones in the same dimensions as age must have taken its toll on them.The PM 2517X needs a new LCD display and doesn't show any useful readings, but I have checked the outputs from the main board with my logic analyzer and the main board seems to be working fine, so I'm consindering good ways to replace the display module. An arduino or PIC processor reading the signals from the main board, driving a 2x16 character LCD and some serial RS232 or USB output in order to convert the multimeter into a data logging multimeter could be a fun project, but a copy of the 2517E LED display on a piece of prototyping board will probably be my first go to ensure the meter actually works.I coudn't find any threads about these fine instruments so I decided to start a new one.Below are some pictures of the PM2517E and the internals of the PM2517X for your enjoyment.
FSH6 FSH3 schematic or layout - Page 1
Forum section: electronics / testgear

author: Xyphro
author_rank: Regular Contributor
timestamp: February 13, 2023, 09:26:51 pm
content: Hi!A friend of mine (without internet) has an R&S FSH6 where some keys on the keyboard are not working.We checked already the keyboard, but there are no broken wires. They make well contact, even when testing them down towards the connector on the PCB. The resistances of the keys when pressed is rather equal for all keys. After long analysis we think, that there is something broken on the PCB.Unfortunately the service manual does not contain any schematic or layout, only a component placement diagram.Does maybe somebody has some more details like schematic of keyboard to main IC connection or similar to enable us to debug further?Best regards,Kai

author: Xyphro
author_rank: Regular Contributor
timestamp: February 14, 2023, 10:56:08 am
content: Or: did anybody probe the switch matrix connections and can tell me which connector pin has to make connection to which IC pin? :-)
Small Bench-Top Temperature Test Chamber - Page 1
Forum section: electronics / testgear

author: 741
author_rank: Frequent Contributor
timestamp: February 13, 2023, 01:51:30 pm
content: We are testing electronic assemblies, including (as yet undecided type) batteries.Specifications/RequirementsAbility to set a time-temperature profile (PC control ideally)-25C to + 40C range (No requirement for external coolant)Able to accommodate a 'box' with dimensions 285 x 250 x 140mm = 11.2 x 9.8 x 5.5 inchesBudget about £4kI don't know if the above budget is realistic - After lots of searching, I've not found anything that seems to approach the above wish-list.Most results are over-the-top in terms of specification, size and cost.

author: mendip_discovery
author_rank: Super Contributor
timestamp: February 13, 2023, 06:37:09 pm
content: TiN has some instructions over on xdevs for the kind of setup he uses.
Analogue-capable logic analysers? Looking for alternative to Saleae Logic Pro - Page 1
Forum section: electronics / testgear

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: February 12, 2023, 06:07:48 pm
content: The Saleae Logic Pro's multi-channel analogue capture can be very useful for finding non-obvious electrical-level problems like bus fights. Problem is it's bloody expensive ... $1,000 US new, or maybe about $400 on the secondary market. Could just as well buy a four-channel scope at this price, except the tiny Saleae's portability is a feature in itself.Alternatives:Analog Discovery: cheaper, but only 2 analogue channelsLHT00SU1: super cheap, fully open source, but only 1 analogue channel and only 24 MS/sAnything else out there?

author: cedric!
author_rank: Contributor
timestamp: February 12, 2023, 07:01:09 pm
content: You can checkout the mixed signal devices here:https://sigrok.org/wiki/Supported_hardware

author: cedric!
author_rank: Contributor
timestamp: February 12, 2023, 07:20:06 pm
content: maybe 3 channel ADC @ 500KHz + 21 digital channels is suitable?https://hackaday.com/2022/03/02/need-a-logic-analyzer-use-your-pico/

author: Gyro
author_rank: Super Contributor
timestamp: February 12, 2023, 07:25:21 pm
content: Quote from: I wanted a rude username on February 12, 2023, 06:07:48 pmAh, a clone of the old USBee AX pro. Just a standard unbuffered EzUSB chip $10 logic analyser with an ADC tacked on. There's no way that'll give you anything like 24Ms/s if you're monitoring digital signals too.P.S. I'm not sure about the "fully open source". The reason why USBee dropped it and nearly went bust was because they got massively cloned.

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: February 12, 2023, 07:51:51 pm
content: You're right, I should have clarified ... thesoftwareis fully open source, right down tothe firmware that runs on the device. It's 12 MS/s in mixed mode.Quote from: cedric! on February 12, 2023, 07:20:06 pmIt's a bit slow aside from maybe capturing I2C or UART. The digital side could be useful for embedding in DUTs though. I'd already checked Sigrok's site unfortunately ... the devices classed as mixed signal there are mostly scopes, pricey and with limited analogue channels.
HDS200 oscillation funktion damaged - Page 1
Forum section: electronics / testgear

author: Xinax
author_rank: Newbie
timestamp: February 13, 2023, 12:08:44 pm
content: I have the problem, that I had a short moment where I was not paying attention and measured a 230V AC over a wrong connection and seem to grilled only the oscillation.The normal measurements are still working correctly, at a visual inspection the only SMD part which seems damaged is the component D11 at the board HDS200-MAIN-V3.1.I cannot see which part this is, so I can replace it (no visual, no wiring diagram and no PCB info). Hopefully someone here can help me with this, I do not want to buy a new one, when the repair cost would be only cents.

author: jonpaul
author_rank: Super Contributor
timestamp: February 13, 2023, 12:25:56 pm
content: no idea what is hds200probably impossible to fix, buy a new meter, €15..50j

author: Xinax
author_rank: Newbie
timestamp: February 13, 2023, 01:39:11 pm
content: That is a multimeter with integrated oscillation gen and measure and cost about 200€+

author: nctnico
author_rank: Super Contributor
timestamp: February 13, 2023, 01:45:06 pm
content: You can try to leave the diode out but it is possible a lot more is damaged. It looks like an output protection that uses the supply rails to clamp overvoltage into (which is not good design practise). If the output still doesn't work without the diode, you'll need to reverse engineer the circuit starting with the power supplies and check whether these still work. Also make sure the trace between the diode and the output connector is still making a connection.
Thermal chamber brands recommendations - Page 1
Forum section: electronics / testgear

author: ddavidebor
author_rank: Super Contributor
timestamp: February 11, 2023, 11:32:35 pm
content: I’m considering purchasing a thermal chamber with around 400x400x400mm internal volume that can hold temperature between 10 and 40 degrees Celsius, so pretty basic requirements.Does anyone have any brand recommendations? I’m in the UK

author: mkissin
author_rank: Regular Contributor
timestamp: February 13, 2023, 12:11:06 am
content: You'll need to provide more specs; mainly the power requirements if you're looking for one that can actively chill like that.

author: Kean
author_rank: Unknown
timestamp: February 13, 2023, 01:16:18 am
content: Quote from: mkissin on February 13, 2023, 12:11:06 amChill? He is in the UK, so surely it will always be heating even with a decent heat source inside...But seriously, at a minimum you'll need an idea of system capacity to deal with your thermal loads. A range of 10-40C generally isn't hard, unless you are also dealing with high power devices or need high ramp rates. Also consider if you want control (or at least monitoring) of RH, and if you want a window or need cable egress.There are a few DIY projects documented on this site using peltiers and OTS controllers, and Dave even did at east one video on the topic.

author: fourfathom
author_rank: Super Contributor
timestamp: February 13, 2023, 01:44:19 am
content: I don't think the internal measurements are quite that big, but for keeping low-power devices at a constant temperature you might want to look at the "Reptile Incubator" as seen on EEVBlog video. With this TEC heating/cooling I can control the temperature from <+10C to +60CI modified mine to use an external controller. The stock incubator internal fans only run when the TEC is on, and the change in air circulation when cycling affected my DUT, so now the fan runs continuously when the chamber is in use. My controller lets me set up temperature/time profiles. The stock unit only has a setpoint, and IIRC the temperature would oscillate +/- 1 deg C around the setpoint. It can take hours to run a 50 deg C cycle, the heating/cooling rate is very slow. So you're not going to use this for thermal shock tests!But it's cheap and good enough for what I need.
Brymen BM786 surface discolouration upon contact w/ test leads - Page 1
Forum section: electronics / testgear

author: borez
author_rank: Newbie
timestamp: February 17, 2023, 12:20:05 pm
content: Hi all,Got a strange cosmetic problem. Ordered a BM786 from WeElectron recently (with the packaged test leads). Have a habit to wrap the test leads around the multimeter. Took it out recently and realised that there are discoloured marks on the multimeter (where the leads were wrapped).It’s a cosmetic issue, but certainly weird and of a bummer (I can’t wrap the test leads now). Any idea on what’s happening? Will drop an email to WeElectron nevertheless.

author: TomKatt
author_rank: Frequent Contributor
timestamp: February 17, 2023, 12:27:26 pm
content: Is it possible the discoloration is some kind of coating or silicone rubbing off the leads, or does it look like it's in the blue boot?I do the same thing with my leads on my BM235... Only received it last week, but haven't observed anything like that (yet).

author: borez
author_rank: Newbie
timestamp: February 17, 2023, 12:35:03 pm
content: Tried to rub it off with iso alcohol but no go. It seems that the rubber coating got eaten into - I can feel surface indentations when I run my fingers across.Have I gotten radioactive test leads?

author: robert.rozee
author_rank: Frequent Contributor
timestamp: February 17, 2023, 12:37:03 pm
content: the problem is discussed in this thread:https://www.eevblog.com/forum/testgear/protek-their-production-line-is-just-too-fast/msg22352/#msg22352and:https://www.eevblog.com/forum/testgear/protek-their-production-line-is-just-too-fast/msg22559/#msg22559a relatively common problem in various forms, caused by chemicals from one type of plastic leaching out and affecting another type of plastic that happens to be in close proximity (touching). i'm going to hazard a guess that your meter came with PVC leads instead of silicone.cheers,rob :-)

author: borez
author_rank: Newbie
timestamp: February 17, 2023, 12:42:36 pm
content: Quote from: robert.rozee on February 17, 2023, 12:37:03 pmThanks - would have thought the prepackaged test leads (which are upgraded versions?) would have been better made. And it certainly felt soft enough to be made out of silicone. My test leads weren't even wrapped around for more than 2 weeks.

author: TomKatt
author_rank: Frequent Contributor
timestamp: February 17, 2023, 02:49:19 pm
content: I wonder if there is something with either the blue colored composition, or perhaps they've changed the recipe in recent years? I've got a many years old Greenlee DM-280A (rebranded Brymen BM827S) and have always wrapped my test leads around the meter. The Greenlee boot cover is green, and other than scuffing from use has no marks from the leads at all. As my primary working meter, it's been tossed into bags and stored in hot cars so it certainly hasn't lived a sheltered life.
Best Spectrum Analyzer for 15k USD - Page 1
Forum section: electronics / testgear

author: strahd_von_zarovich
author_rank: Contributor
timestamp: February 10, 2023, 11:09:09 am
content: Hi everyone,Can you suggest me a spectrum analyzer for 15k USD?Features like remote connection etc. which are not about performance is not important for me. Also, brand is not important.I am trying to find a device which has best performance characteristics.Hackable instruments are more than welcome for best price/performance.Thanks in advance.

author: AFTORF
author_rank: Contributor
timestamp: February 10, 2023, 12:38:26 pm
content: Which max frequency do you need ?

author: jonpaul
author_rank: Super Contributor
timestamp: February 10, 2023, 01:24:35 pm
content: Very vague questionsaudio ? RF ? microwave? millimeter ?for EMI, SMPS, broadcast,Jon

author: gperoni
author_rank: Contributor
timestamp: February 10, 2023, 02:45:10 pm
content: SignalHound SM200Bhttps://signalhound.com/products/sm200b-20-ghz-real-time-spectrum-analyzer/

author: baldurn
author_rank: Regular Contributor
timestamp: February 12, 2023, 12:52:14 am
content: A budget is good but just asking for the most expensive instrument that fits within the budget may not be the best approach? Maybe you could save some money or maybe it is better to buy multiple instruments all depending on your requirements. Maybe the budget is too small. Please let us know more about what you intend to do with your investment. You will get much better advice that way.
Fluke Helios Plus 2287A, 1500 I/O Frontend, Teardown and Test - Page 1
Forum section: electronics / testgear

author: madsbarnkob
author_rank: Frequent Contributor
timestamp: February 11, 2023, 06:43:30 pm
content: Teardown, cleaning and test of a Fluke Helios Plus 2287A Data Acquisition Frontend and 2181A Extender. The Frontend and extender features two Fluke 2280A-161 High Performance A/D Converter 2280A161 cards and nine 20-channel RTD/Resistance Scanner modules, for a total of 180 inputs in this setup with a Frontend and Extender.The main CPU is a Texas Instruments TMS9995, which essentially is a TI-990 Microcomputer on a single IC.Fluke 2280A-161 High Performance A/D Converter 2280A161 has its own smaller microcontroller to respond and time the measurements, in correspondence to the commands from the CPU module. The local controller is a Toshiba TMP80C39AP-6 which is a 8-bit controller running at 6 MHz with 27 I/O and 8 built-in timers.A Intersil HD3-6402 UART Universal Asynchronous Receiver Transmitter is used for the communication through the mainframe backplaneThe 20-channel RTD/Resistance Scanner 2280A153 modules only has enough logic ICs to drive the 20 reed relays and communicate with the High Performance ADC 2280A161 card.All pictures can be found at:https://kaizerpowerelectronics.dk/electronics/fluke-helios-plus-2287a-1500-i-o-frontend-teardown-and-test/
"Saleae" clone logic analyzer and pulseview show inputs as HIGH when they aren't - Page 1
Forum section: electronics / testgear

author: robduarte
author_rank: Newbie
timestamp: February 11, 2023, 02:47:25 pm
content: Hi,I am trying to reverse engineer an RJ45 data cable on a laser cutter. I can see, with the logic analyzer and Pulseview, that there is really only one wire that does much. I could just stop there, since that wire tells me everything I need to continue with my project - it encodes the duty cycle of the laser tube.The issue is that I can see, with a multimeter, that some of the other 7 wires are HIGH and some are LOW. But Pulseview shows them all as HIGH (except for the one with a changing signal). I tried swapping wires around and Pulseview always shows the data where it should, but the others remain HIGH on-screen (so it's not dead inputs on the LA). The voltages are essentially 3.3v and 0v so I wouldn't think it's a problem with the threshold. I have connected the ground pin from the LA to the circuit.What am I missing??Thanks for any help!Rob

author: ledtester
author_rank: Super Contributor
timestamp: February 11, 2023, 03:03:52 pm
content: If the other wires aren't carrying any data it is possible they are floating in which case the logic analyzer could detect it as a high or low or even as an oscillating input.Try attaching a 10K to 100K resistor from the wire to ground and see how the LA reads it. If the wire is floating then with the resistor it will consistently read it as low.Btw, is ground one of the wires in the RJ45 cable? You mentioned that you see the issue with "7 other wires" but I would expect at most 6 wires in the RJ45 cable to be floating (8 minus the data and ground wires).Finally, how is the computer/laptop connected to the LA powered? Are you using a laptop running on battery power or plugged into an AC adaptor?

author: robduarte
author_rank: Newbie
timestamp: February 11, 2023, 04:11:56 pm
content: You are correct - one of the 8 wires is ground.The computer is a desktop and it's plugged into the wall. This is a fancy facility with lots of outlets on independent circuits, so I guess it's possible that the outlet that the laser is plugged into is a different circuit than the computer. Do you think that matters? If there were a ground loop, would I be able to see the interesting signal with no troubles?Re:floating that's an interesting thought.. I really think this company used an RJ45 connector/cable to connect the control board to the laser tube because it was convenient but only one wire (and ground) were actually needed. So maybe the other wires are floating because they are essentially ignoring them. I think it's also possible that I disconnected the laser tube's power at some point in my testing - maybe there's some active electronics in there that pull down the other pins?Rob
HP 8640B swap range gear assemblies? - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: February 10, 2023, 06:55:24 pm
content: My 8640B needs new gears and at 82 I didn't like the challenge of the task of changing gears so I delayed and just bought a range gear assembly off eBay and consider the swap an acceptable task. It's been over 20 years since I've been inside one and would appreciate any tips on doing the swap safely and with the least effort. ThanksHank
HP8566 data? - Page 1
Forum section: electronics / testgear

author: gdgross
author_rank: Newbie
timestamp: February 09, 2023, 09:24:45 pm
content: Shot in the dark here.Does anyone know of a way to get actual trace data (ie, a csv file or similar) out of an old HP8566 spectrum analyzer? I am able to get *plots* via a national instruments GPIB->USB converter and the HP7470A plotter emulator app, but there are only graphical plots. I'd like to get actual xy data that I can import into excel or matlab and plot on my own.Any ideas?Thanks!Geoff

author: RFMWdude
author_rank: Contributor
timestamp: February 09, 2023, 09:43:35 pm
content: Look for the 'SATRACE' utility in the KE5FX GPIB Toolkit (http://www.ke5fx.com/gpib/readme.htm)

author: 0culus
author_rank: Super Contributor
timestamp: February 10, 2023, 04:02:13 am
content: I recommend reading and understanding the 8566B programming manual. I don't quite remember all the specific commands, but there are a lot of BASIC capabilities provided for operating on traces (including getting the contents of a trace memory offboard onto a computer for further analysis). Note that the trace memories are fully digitized post IF...except for the fastest few sweep settings (where it switches to a direct analog sweep), the crt displays the data vector from trace memory.
DIY Open-Sided TEM Cell for EMC Testing? - Page 1
Forum section: electronics / testgear

author: coflynn
author_rank: Regular Contributor
timestamp: March 07, 2015, 10:32:03 pm
content: Hello,I wondered if anyone had designed/built their own open-sided TEM cell for basic EMC testing, or otherwise used one? Basically appears to be a few pieces of PCB of appropriate dimensions to form the cell.As a reference here is a few examples of what I'm talking about:Commercial small TEM cell - $599, see manual for detailsAtmel article on TEM cell - fairly largePaper on DIY TEM cell - medium sizeI was looking at making PCB design that could just be sent to fab, but wondered if someone else had done that? The $600 TEM cell isn't a terrible deal compared to the cost of large PCBs, but it's also maybe a little small for my use.Regards,-Colin

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 08, 2015, 04:15:58 am
content: One of these days I'm going to do something like that. But why use PCB? I was thinking cardboard, aluminum foil and tape!Tim

author: wemme
author_rank: Regular Contributor
timestamp: April 23, 2015, 10:24:26 am
content: I would like to build a closed tem cell for emc radiated and susceptibility testing. I always thought a open tem cell was some what compromised I.e spewing out e fields and picking up back ground noise. Any one have any experience with these?

author: acbern
author_rank: Frequent Contributor
timestamp: April 23, 2015, 11:17:16 pm
content: would agree, should be closed. am interested as well, so anybody who has done that and wishes to share info would really be appreciated.

author: wemme
author_rank: Regular Contributor
timestamp: April 24, 2015, 10:37:52 pm
content: I Have collected a number of papers including research on the topic however i have not had any time to review or do anything about it as i am seriously tied up with work.PM me if you are interested in a copy of what i have collected.RegardsBartQuote from: acbern on April 23, 2015, 11:17:16 pm

author: asiannerd
author_rank: Newbie
timestamp: May 14, 2015, 09:12:11 am
content: We use a commercial open TEM Cell in our lab:http://www.frankoniagroup.com/downloads/EMC_Test_Equipment/tem_cells_open.pdf, though not really low cost. Advantage is that we can monitor displays and LEDs during testing easily.External noise can be easily identified by powering on/off the DUTHere a youtube video from the chip whisperer using an open TEM Cell:

author: Smokey
author_rank: Super Contributor
timestamp: February 09, 2023, 06:58:21 am
content: Anyone end up making one of these?

author: nctnico
author_rank: Super Contributor
timestamp: February 09, 2023, 08:39:08 am
content: Quote from: Smokey on February 09, 2023, 06:58:21 amYes. I have designed and build a fully closed TEM cell. But I didn't got to finishing the text yet and the Excel sheet I created to calculate all the sizes needs some tweaking as well. I'm planning to do a very longwinded post about the entire project. Likely I'll need several postings to fit all the text...
2mm Banana Socket Test Probes - Page 1
Forum section: electronics / testgear

author: TimeBandit
author_rank: Regular Contributor
timestamp: February 11, 2023, 08:35:23 pm
content: I'm looking for a pair of test probes like these from Peak:https://www.peakelec.co.uk/acatalog/esr-needle-probes.htmlOther than them and Fluke/Pomona, I haven't been able to find any other manufacturers. BUT. . .there's a chance I've missed someone. If anyone knows of a source, let me know. Otherwise, I'll just get the ones from Peak.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: February 12, 2023, 06:16:04 am
content: Both Staeubli (formerly MC) and SKS (formerly Hirschmann) have probes with 2mm connectors.
Utilisation de LogicPort avec CAN BUS - Page 1
Forum section: electronics / testgear

author: awyi2023
author_rank: Newbie
timestamp: January 21, 2023, 10:52:05 pm
content: Bonjour,J’utilise INTRONIX Logicport pour mesurer des trames CAN BUS. J’utilise 2 carte CANduino.La communication marche parfaitement entre les 2 cartes . Je visualise les données sur le l’HyperTerminal tout est correct.Mais lorsque j’essaye de mesurer le signal CANL avec LogicPort, je n’arrive pas identifier correctement la trame. Je ne trouve pas les identificateurs au niveau de la trame. dans l'interpréteur j'ai utilisé les dominants LO et HI je n'arrive pasLe CANduino émetteur, envoi 2 trames de 8 octets, avec les identificateurs 0x0F6 et 0x036.Voir en pièces jointes les captures d’écran.Merci de votre aide.Bonne journéeIdir---------------------------Hello,I use INTRONIX Logicport to measure CAN BUS frames. I use 2 CANduino cards.Communication works perfectly between the 2 cards. I view the data on the HyperTerminal everything is correct.But when I try to measure the CANL signal with LogicPort, I cannot correctly identify the frame. I can't find the frame-level identifiers. in the interpreter I used the dominants LO and HI I can'tThe sending CANduino, sends 2 frames of 8 bytes, with identifiers 0x0F6 and 0x036.See attached screenshots.Thank you for your help.Have a good dayIdir

author: EEngo
author_rank: Unknown
timestamp: February 04, 2023, 07:06:50 pm
content: Hi,are you sure you are using 50000 Hz, not 500kbit/s?

author: awyi2023
author_rank: Newbie
timestamp: February 07, 2023, 03:22:28 am
content: Hello,Thanks you for your response. Yes I use 50Kb . I try with 500Kb it give's same result.Idir

author: darkspr1te
author_rank: Frequent Contributor
timestamp: February 07, 2023, 06:03:21 am
content: Quote from: awyi2023 on January 21, 2023, 10:52:05 pmWhen i was using various devices to scan CANBUS (scope, logic probe) i found that i needed to monitor both CAN H and CAN L for the automated system to auto decoded. Not sure is you have that same issue. As CAN L is just a inversed CAN H one would assume it's not required to just decode but I found that software often assume that both signals are there and AND's them for the result.darkspr1te

author: awyi2023
author_rank: Newbie
timestamp: February 09, 2023, 05:23:54 am
content: Hello,Thank you. I have make change in code send.inoCAN.sendMsgBuf(0x2AA,0,8,stmp) with CAN.sendMsgBuf(0x2AA,0,0,8,stmp)the first "0" is the standard mode and the second "0" say that the frame is Data.I Visuale CANL, now it's Work.see the captures.Thank for your help
Hantek DSO5102P D/C measurements.  - Page 1
Forum section: electronics / testgear

author: chinoy
author_rank: Regular Contributor
timestamp: February 08, 2023, 06:32:57 am
content: Working on discrete voltage regulators and power supply units for audio.I spent a few weeks trying to build a clean PSU regulated circuit for my pre-amp.After I figured something was wrong and Ive been chasing my tail. For a few weeks.Decided to test the scope on a battery. And when I saw the same noise when measuring a bat. Figured its an issue with the scope.I have a new Hantek DSO5102P (Did not upgrade the firmware / hack).My problem is I am seeing a 600 millivolt peak to peak when measuring a bat. So the logic of trying to build a clean d/c power supply from audio hits a brick wall here.What am I doing wrong ?. Unit has been self calibrated multiple times. Probes have been calibrated multiple times.I have tried auto set. Manual set. Still I see this peak to peak no matter what bat I try with.Im thinking I should dig up my old Fluke Scope and see if it reports the same problem.I have tried with lead acid bat, li-ion bats. No matter what I try. Im seeing this large peak to peak values.Any tips on how to setup the scope to measure d/c noise. And what is acceptable peak to peak on a d/c line.Also if you have any circuits for a discreet 7812 / 7912.I will try to take some pictures next time Im at the workshop.I read on another post to set the signal to a/c if set to a/c this is the results i get.Note the peak to peak numbers.DUT= Li-Ion Bat.Pic 1 is the result I get if I click on auto set.Pic 2 is the result I get if I set coupling to a/cVideo is the result if I set to d/c with 1 volt and I spend a lot of time scrolling to get the line visible. Note the peak to peak number jumping and the noise.My understanding that a bat should not have noise or peak to peak signals. (Ok video not allowed).

author: chinoy
author_rank: Regular Contributor
timestamp: February 08, 2023, 02:45:20 pm
content: Found this will add more.https://www.eetimes.com/tips-and-techniques-for-power-supply-noise-measurements/#:~:text=Due%20to%20the%20wide%20bandwidth,illustrate%20later%20in%20an%20example.
Need drivers for ADLINK USBDAQ 9100 MS  - Page 1
Forum section: electronics / testgear

author: Overspeed
author_rank: Frequent Contributor
timestamp: February 11, 2023, 10:13:33 am
content: HelloDoes some one have a set of Windows drivers for a data acquisition system for ADLINK USBDAQ 9100 MSRegardsOS

author: coromonadalix
author_rank: Super Contributor
timestamp: February 11, 2023, 01:30:56 pm
content: yur best luck is asking ADLINK ....they only show manualsand their ad logger software need some registration

author: Overspeed
author_rank: Frequent Contributor
timestamp: February 11, 2023, 02:51:13 pm
content: HelloThanks I have tried by using the registration way and no answer after one week .....RegardsOS

author: coromonadalix
author_rank: Super Contributor
timestamp: February 11, 2023, 04:14:52 pm
content: oh shooot good luck, google fuu gave nothing
Agilent N1996A LF operations. - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: February 07, 2023, 03:16:38 am
content: The system screen indicates that all options are installed and it covers 100kHz to 6GHz. I want to sweep some 455 kHz IF filters and I can't set the Start Frequency below 10 mHz. It automatically goes to 10 mHz for any number below 10 mHz. I hope it's me doing something incorrectly and not the CSA! Any guidance appreciated. ThanksHank

author: chilternview
author_rank: Frequent Contributor
timestamp: February 07, 2023, 06:18:47 am
content: I believe that the stimulus/response unit on that model only goes from 10MHz up, so you may be out of luck.

author: TheSteve
author_rank: Unknown
timestamp: February 07, 2023, 07:02:45 am
content: Correct, the return loss bridge is not spec'd for operation below 10 MHz. That doesn't mean the firmware can't be "tweaked" though.

author: wd5jfr
author_rank: Regular Contributor
timestamp: February 07, 2023, 12:42:22 pm
content: Hey SteveThanks for the response and now for 3 questions.!. How did you get down to 7 mHz?2. What does the 100 kHz spec mean as far as when and how can the CSA be used at 100mHz?3. I just want to sweep the filter which with a SA doesn't require a RLB, so can it be configured to do a sweep without its RLB?ThanksHank

author: TheSteve
author_rank: Unknown
timestamp: February 07, 2023, 04:11:26 pm
content: The Spectrum Analyzer is spec'd to 100 kHz. The signal source begins at 10 MHz. I have used it lower but I don't recall how low I had it operating as it was quite a few years ago now. The instructions on how to alter the freq range are in a post on this forum somewhere. I recall you need to login via telnet and then edit a text file.

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 07, 2023, 04:47:10 pm
content: Or just use a noise source, the SA goes down to 100KHz so well within reach.

author: wd5jfr
author_rank: Regular Contributor
timestamp: February 08, 2023, 01:48:15 pm
content: Hey PaulThanks for the suggestion. There's a lot of rf noise sources on Ebay and a few on Amazon and Aliexpress. I've never used one so I would appreciate any recommendations for one that goes to 10mHz as the CSA is go to go after that. I think I rather go with Amazon rather than have to wait on China.ThanksHank
Agilent Logic Analyzer 90 pin pods - CLK_p, CLK_n connection? - Page 1
Forum section: electronics / testgear

author: deanclaxton
author_rank: Regular Contributor
timestamp: February 08, 2023, 04:19:24 am
content: I'm building a 65C02 adapter that will be attached to 90 pin analyzer pods. I'm assuming if I'm using a single ended clock signal that I connect it to the CLK_p - is CLK_n then connected to ground or left floating?

author: deanclaxton
author_rank: Regular Contributor
timestamp: February 08, 2023, 06:37:03 am
content: Found this on page 53 of this manualhttps://www.artisantg.com/info/Agilent_E5378A_Manual.pdf:Clock inputThe clock input to the E5378A probe is differential. If you supply a differential clock, you should select the "differential" option in the clock threshold user interface.If your system uses a single-ended clock signal, the CLKn input should be either grounded or connected to a dc power supply.You may:• Ground the CLKn input and adjust the clock threshold from the user interface to between -3V dc and +5V dc.Or• Supply a threshold reference voltage between -3V dc and +5V dc to the CLKn input. In this case, the clock threshold in the user interface should be set to zero.If your circuit uses a resistive divider to provide a threshold reference, be sure to consider the equivalent circuit consisting of the 20k resistor connected to +0.75Vas shown on page 34 and 35.The threshold for the clock input has a separate adjustment in the user interface, independent of the data inputs.
Rigol DS1102e partially powers on. Help please - Page 1
Forum section: electronics / testgear

author: Vetteguy112233
author_rank: Newbie
timestamp: February 08, 2023, 06:02:31 am
content: Last year I purchased the unit at a local yard sale and the user couldn't remember if it worked or not but upon getting it home and trying to Power It Up I found that it sometimes will show the green lights on the switches but almost immediately they go out. Every once in awhile the screen will also turn on with a white color but also immediately turns off and goes black however it appears the screen is still on but just showing a black color. I can also hear the fan running and right before things shut off the relay underneath input Port 1 clicks but I've been told that's normal. I guess that's what I get for $20It's currently torn apart on my bed and I don't see any leaking or bulging caps, charred areas or any other signs of an obvious problem.I'm still learning and would love to fix this device which will obviously Aid me in fixing others once I learn how to use it

author: Psi
author_rank: Super Contributor
timestamp: February 08, 2023, 06:11:32 am
content: Put a meter on each supply rail on the power supply PCB and see if one is disappearing when the thing shuts off, could be a sign of a problem where the PSU is shutting-down or one rail is disappearing .Also check the psu board power on wire (if it has one) to see if the control board is commanding a turn off or not.WATCH OUT FOR MAINS VOLTAGES on the PSU board.
Siglent SDS1204X-E trigger affects input signal - Page 1
Forum section: electronics / testgear

author: andorrr
author_rank: Newbie
timestamp: February 07, 2023, 12:36:38 pm
content: Dear EEVblog Forum,This is my first post. Attached, you see two screenshots of a Siglent SDS1204X-E scope displaying a 1kHz sine wave originating from a HP8903B Audio Analyzer. The sine wave's THD+noise is close to -90dB, so it is quite a clean signal. It was fed to channels 1 and 3 of the scope, and terminated properly with 50 Ohms. (The HP8903B can be switched to 50 Ohm output impedance).The only difference in the screenshots' setup is the trigger source. I captured these shots because I noticed in the past days that at such a small horizontal time base, you can see a small bump on the signal at the trigger point. Has anyone else noticed this behavior? I didn't find this on the forum, but please tell me if I am repeating someone else's post. Thanks a lot!Andor
SDS6204A - double triggering on oscilloscope - Page 1
Forum section: electronics / testgear

author: mash107
author_rank: Contributor
timestamp: February 06, 2023, 08:34:16 pm
content: HiLong term lurker - need help with a newly purchased Siglent SDS6204A. First time I've ever captured two waveforms in a single screen. Is this a feature or a bug?Is there a workaround?https://imgur.com/a/s6sVbO5Regards!

author: tautech
author_rank: Super Contributor
timestamp: February 06, 2023, 09:01:48 pm
content: Quote from: mash107 on February 06, 2023, 08:34:16 pmInteresting, what is it ?I see AC coupled with 20 MHz BW filter engaged and scope timebase in segmented acquisition mode, why for all ?Can you do a Default and check the waveform again with normal settings please.Best here to use the blue Print button to grab a PNG screenshot to USB and use Attachments to add the image as a thumbnail.

author: rf-loop
author_rank: Super Contributor
timestamp: February 07, 2023, 05:55:33 am
content: Quote from: mash107 on February 06, 2023, 08:34:16 pmOf course it works that way because you have set it up to work that way.You have (continuously repeating) sequence acquisition enabled in this image! Do you know what it is?When you turn the reverse gear on in your car, do you call the help desk when you are surprised that your car is going backwards even though the windshield is forward. Your question is on the same level. Just had to say, but it's kinder than it looks because you can't see my face.As already mentioned, hit "default" and start over.Then don't start doing things/functions you haven't figured out first. Feel free to explore what the different functions are and how they work and how their use is applied for different purposes.RTFM
Extech older power supplies - how does master/slave linking work? - Page 1
Forum section: electronics / testgear

author: dobsonr741
author_rank: Frequent Contributor
timestamp: February 05, 2023, 10:22:05 pm
content: I got an Extech 382260 power supply recently. Also sold as Voltcraft LSP-1403, Maplin N27GG, Manson SSP-7080. Great little form factor. It has a master/slave linking mode. I'd like to find out how it works with only GND + 1 wire going between master and slave. I see no analog voltage or any digital signaling leaving the master. Would be great to put the box in remote mode and control it's voltage externally. Does anyone know how?

author: dobsonr741
author_rank: Frequent Contributor
timestamp: February 06, 2023, 09:24:49 pm
content: Looked further. The master presents a voltage proportional to the output current. I expect the master to cut back on it when the feedback loop want to reduce the output voltage. Anyone experimented with controlling a slave?
Tektronix TDS3052B upgrade to MSO4032 - Page 1
Forum section: electronics / testgear

author: Finderbinder
author_rank: Regular Contributor
timestamp: February 06, 2023, 08:57:59 am
content: Does it looks like reasonable upgrade?MSO4032 is stuck with 350MHz as I understand, because 2 ch 500MHz version does not exist.But not looking this aspect is MSO4032 reasonably big step forward? UI, functionality, other?

author: coromonadalix
author_rank: Super Contributor
timestamp: February 06, 2023, 05:08:20 pm
content: i dont know where you took this information, they are not the same machine / hardware based ?unless you made a typo error ??

author: alm
author_rank: Super Contributor
timestamp: February 06, 2023, 05:22:13 pm
content: I'm guessing the question is if it makes sense to buy (or trade) an MSO4032 to replace a TDS3052.

author: Finderbinder
author_rank: Regular Contributor
timestamp: February 06, 2023, 08:35:32 pm
content: Quote from: alm on February 06, 2023, 05:22:13 pmYes, I have Tektronix TDS3052B and want to replace it with Tektronix MSO4032.I know MSO has +Logic analyzer (this is definitely an advantage), but despite that what I might lose if I let go TDS (not to mention bandwidth)?
Atorch DL24p (or pcb) vs DL24MP: function "Costant voltage" - Page 1
Forum section: electronics / testgear

author: Filippo52
author_rank: Regular Contributor
timestamp: February 06, 2023, 07:00:27 pm
content: Does anyone know why the constant voltage function on the model with a single mosfet type DL24P or DL24pcb is practically unusable because it oscillates between two values, while in the model with 4 mosfets DL24MP it works perfectly?Is there a new firmware for the DL24P that can correct the problem or is there a hardware modification??Thank you
Tektronix TDS340 trigger adjustments? - Page 1
Forum section: electronics / testgear

author: cincin
author_rank: Regular Contributor
timestamp: February 06, 2023, 05:01:52 pm
content: My trusty TDS340 (with option 14) works wonderfully but for one thing: the trigger behaviour doesn't match the trigger display. That is, the trigger arrow and displayed trigger level value, are both some 600mV off where the unit actually triggers.i.e. If I look at the 5V calibration square wave (0V to 5V), the trigger won't actually trigger until the displayed trigger value is at about 600mV, and the arrow indicating the same. And it won't stop triggering until I am about 600mV above the wave. So it'll trigger on the 5V square wave all the way up to 5.6V, with the trigger cursor arrow 600mV above the square wave.It hasn't really gotten in the way yet, when you know you can compensate for it. But I'd love to adjust that, to make it perfect.I read the service manual (for the TDS340A, closest I could find) and the only trim-pot based adjustment they speak of is for the incoming probe signals.Anyone familiar with Tektronix trigger adjustments?Or is this not adjustable, and a symptom of a potential problem?Any insights greatly appreciated.
Rigol DS1054Z fussy probe question - Page 1
Forum section: electronics / testgear

author: mbratch
author_rank: Contributor
timestamp: February 08, 2023, 04:33:15 pm
content: I have a Rigol DS1054Z and have noticed that the stock probes sometimes don't seem to be making good contact. The symptom is that I will sometimes get readings from the probe which have a reduced voltage compared to actual, roughly around 50% of the actual level. The signal integrity otherwise is good (relative levels, frequency, etc). If I fuss with the probe a bit, twisting it, reinserting the spring hook adapter, reconnecting the ground lead, etc, I can eventually get it to read full signal. But sometimes if I wiggle it a little inadvertently, it might go back to reduced level.Is this typical of probes, or are these probes suffering from some minor quality issue? The probes are RP2200 (c) 2007. Not sure of their date of manufacture. I bought the scope new within the last 2 years.

author: RoGeorge
author_rank: Super Contributor
timestamp: February 08, 2023, 04:46:21 pm
content: Try to flip a couple of times back and forth the 10x-1x mechanical switch. Check the GND and the tip clamps are firmly inserted. If not, maybe it's a defective probe.

author: hexreader
author_rank: Frequent Contributor
timestamp: February 08, 2023, 05:12:59 pm
content: I have Two rigol scopes with probes as follows:RP2200 copyright year 2007 - all four of these are reliable on 10x setting, but very unreliable on 1x - rattling the switches and/or spraying with switch cleaner helps a little, but not for long. I only ever use these on 10x setting.PVP2150 copyright 2016 - never had any problems of any kind

author: mbratch
author_rank: Contributor
timestamp: February 08, 2023, 06:22:18 pm
content: Quote from: RoGeorge on February 08, 2023, 04:46:21 pmThanks for the suggestion! The inaccuracy is usually a factor of 2x, not 10x. I'll try this but I'm skeptical that it will help.

author: mbratch
author_rank: Contributor
timestamp: February 08, 2023, 06:23:18 pm
content: Quote from: hexreader on February 08, 2023, 05:12:59 pmI'm using RP2200 (c) 2007 probes. I usually am on 10x settings, and see the issues there. So my experience differs from yours. The date of manufacture of RP2200 probes is probably over a number of years, so we could easily have probes from totally different years. The probes seem otherwise reasonably good quality. There are a few variable contact points: where the clip goes on the device, where the probe pin inserts into the probe clip adapter, and where the probe connector connects to the scope. I suspect the probe pin to clip adapter contact is not great.
HP 8593A Cal Tracking issue - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: February 06, 2023, 02:13:40 pm
content: Short story is: I push the "CAL TRK GEN" and it just does nothing. I did place a 1100-1160MHz Band Pass filter inline and it tracked perfect?? So it seems the tracking Gen is working but wont run the self cal? yes I have a good coax between TRK out to RF IN.Everything else is working great just this weird issue, I would like to say I know when it started but I acquired the Analyzer like this.I know that the hard button used for CAAL TRK GEN is functioning I’ve used for other tests/ settings.Might this be a software issue?I’m lost, Andrew
RD6018 on a lower current supply - can I set an OCP current curve? - Page 1
Forum section: electronics / testgear

author: SpottedDick
author_rank: Regular Contributor
timestamp: February 05, 2023, 02:36:41 pm
content: Hi All,So I'm currently putting together a power supply using a RD6018 and Meanwell 400W 48V 8.3A supply.(Figures below are just for demonstration)While at 48V, I'll only get 8.3A, at 24V, I could get 16A.Is it possible to set an OCP curve for this setup on the RD6018?Thanks in advance

author: SpottedDick
author_rank: Regular Contributor
timestamp: February 06, 2023, 03:32:32 am
content: Well apparently it's not possible on the default Riden software BUT the Unisoft software adds over power protection, which will do exactly what I want