hybridfree/eevblog-posts huggingface dataset:
Where online do the QuantAsylum QA401 owners hang out? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: February 15, 2019, 05:55:35 pm
content: I don't find a user forum on the QA web page, and there's one really really long thread on diyAudio, but where else do QA401 users hang out and talk to one another?Just took delivery of one and want to kick around a startup issue I'm having. Thanks.

author: mlloyd1
author_rank: Contributor
timestamp: February 15, 2019, 06:34:09 pm
content: given the amount of activity as well as looking at the last post activity dates, i would guess that you are most likely to get some kind of response to a question on the diyaudio forum.other forums where I've seen the QA401 mentioned haven't had much activity for quite some time (over a year or two).good luck,mlloyd1

author: cvanc
author_rank: Frequent Contributor
timestamp: February 15, 2019, 10:38:43 pm
content: Thanks mlloyd.QA email support got right back to me and took care of my issue in a single email. I'm up and running and off to the races...

author: mlloyd1
author_rank: Contributor
timestamp: February 19, 2019, 03:30:26 pm
content: that's great to hear. i'm not surprised by their responsiveness. and they do post in the diyaudio group, too.i like mine also, but i haven't done much with it yet - still settling from moving, etc.mlloyd1

author: agdr
author_rank: Unknown
timestamp: February 20, 2019, 03:05:27 am
content: Be sure to keep an eye out for the latest QA401 software releases on Github too:https://github.com/QuantAsylum/QA401/releaseshelps to subscribe, Github will notify with updates. QA has been quite active lately with new releases.Also applies to the new ASIO driver:https://github.com/dechamps/ASIO401/releaseswritten by a 3rd party.Enjoy your QA401! Great little unit.
HP 3245A Universal Source - Page 1
Forum section: electronics / testgear

author: Inverted18650
author_rank: Frequent Contributor
timestamp: February 19, 2019, 11:33:38 pm
content: I watched TiN (xDevs.com) play with one of these units a couple of years ago and then mod in a newer LTZ1000 vRef, so I decided I wanted to get one and try it out as well.Much Love out to TiN and xDevs
CPU instruction decoding with HP logic analyzer - Page 1
Forum section: electronics / testgear

author: Dan Moos
author_rank: Frequent Contributor
timestamp: February 21, 2019, 01:42:17 am
content: I have an HP 1631d analyzer. I know it can be made to decode CPUs (in my case 6502). I'm just no sure what the steps/purchases needed are.I'm also looking at HP 166x and 167x analyzers. Is it easier to get what I want from them?To be clear, what I would like is to be able to see opcodes instead of HEX. Obviously I can figure this out manually, so the luxury of having it decoded automatically needs to be inexpensive!

author: tsman
author_rank: Frequent Contributor
timestamp: February 21, 2019, 01:43:49 am
content: Readhttps://www.eevblog.com/forum/testgear/hp-logic-analyzer-inverse-assemblers/

author: Dan Moos
author_rank: Frequent Contributor
timestamp: February 21, 2019, 06:50:02 am
content: Dang, looks like a pain in the ass! Is there no simple GPIB to USB trick? How modern an analyzer do you need before this becomes simpler to do? Maybe the long discussion made it look tougher than it is
New Teledyne T3DMM series bench meters - Page 1
Forum section: electronics / testgear

author: tooki
author_rank: Super Contributor
timestamp: February 17, 2019, 04:19:25 pm
content: I was browsing Distrelec and came across some meters I hadn't seen before, from Teledyne. Looks like they were announced about a month ago. Anyone heard anything about them?https://teledynelecroy.com/digital-multimeters/

author: Kean
author_rank: Unknown
timestamp: February 17, 2019, 04:39:29 pm
content: Funny how much it looks like a Siglent SDM3045Xhttp://www.siglent.com/ENs/pdxx.aspx?id=1567&tid=37&T=2Edit: And obviously the 5.5/6.5 digit version - SDM3055/SDM3065Xhttp://www.siglent.com/ENs/pdxx.aspx?id=1910&T=2&tid=37Even the measurement value on the T3DMM fact sheet front page (and some others) seem to be taken directly from the SDM3065X Data Sheet (pg 3 “Analog” Bar Display)Marketing were being a little lazy it seems!http://old.siglentamerica.com/USA_website_2014/Documents/DataSheet/SDM3065X_DataSheet_DS06036-E02F.pdf

author: tooki
author_rank: Super Contributor
timestamp: February 17, 2019, 05:26:11 pm
content: Thanks! I think you nailed it!I'd actually kinda suspected it was a rebadge, after seeing in a data sheet or something that the user interface is switchable between English and Chinese.The quick start manuals are essentially identical, just a search-and-replace on the model number and swapped out images:http://www.siglentamerica.com/wp-content/uploads/dlm_uploads/2017/10/SDM3065X_QuickStart_Qs06036-E01A.pdfhttp://cdn.teledynelecroy.com/files/manuals/t3dmm-quick-start-guide.pdfIt'll be curious to see whether Teledyne will add any unique features in firmware, or whether it'll just stay with the Siglent firmware. (Or worse, not even receive Siglent's own updates.)

author: tautech
author_rank: Super Contributor
timestamp: February 17, 2019, 06:44:29 pm
content: These Siglent bench DMM's are also being sold branded RS Pro.

author: Calvin
author_rank: Regular Contributor
timestamp: February 18, 2019, 07:55:34 am
content: Hi,LeCroy has rebadged almost the whole X-Series of Siglent ... even up to the Manuals.IIrc only the Scope manuals differ by 2pages where LeCoy dismissed with one minor function.Apart from the hefty price-upping all else is 100% the same.And yes, the RS rebranded devices are also alot costier.regardsCalvin
CAN BUS Converter - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: March 27, 2017, 12:10:15 pm
content: I have been asked to build a test fixture for a PCB, the board has (among other things) a CAN BUS interface that needs to be go/no-go tested. I have no experience using CAN BUS. I'm thinking the best approach is to pickup a suitable OTS CAN to USB converter.Can anyone recomend a suitable OTS converter that comes with decent documentation that would allow the test PC to establish the communication link and then send and receive a message to verify the CAN bus interface is functional. The test software would need to do this as part of a sequence of other tests so perhaps by simply sending/receiving data on the USB port or with a hook to a DLL etc.

author: tecman
author_rank: Frequent Contributor
timestamp: March 27, 2017, 12:16:45 pm
content: http://www.peak-system.com/PCAN-USB.199.0.html?L=1paul

author: 0xfede
author_rank: Regular Contributor
timestamp: March 27, 2017, 12:50:39 pm
content: I use this one and never had a problem:http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=APGDT002It is also cheap and you can find it on farnell, digikey or whatever.Best,0xfede

author: nctnico
author_rank: Super Contributor
timestamp: March 27, 2017, 02:29:46 pm
content: I have the Lawicel CAN-USB dongle which seems to work OK but I have never gotten to the point where I needed to write my own software for it.http://www.can232.com/?page_id=16

author: Gabri74
author_rank: Regular Contributor
timestamp: March 27, 2017, 02:50:14 pm
content: Bought one of those:http://www.8devices.com/products/usb2canIt's isolated and has linux kernel driver (i guess it was worth mentioning because meybe your scripting/test suite runs on linux).Works flawlessly.

author: tmbinc
author_rank: Frequent Contributor
timestamp: March 27, 2017, 11:32:27 pm
content: I've used a couple of the 8devices USB2CAN in an automotive environment and never had any issues.The Lawicel is easier to use since it's FTDI-based (and hence enumerates as a serial port, and uses a simple ASCII protocol), but the bandwidth is severely limited because of that. In linux, socketcan support for Lawicel doesn't work great (slcan).

author: Kohanbash
author_rank: Regular Contributor
timestamp: March 27, 2017, 11:36:56 pm
content: I have used the peak and kvaser ones reliablyhttp://www.phytools.com/PEAK_IPEH_002021_PCAN_USB_Adapter_p/IPEH-002021.htm?gclid=CjwKEAjw8OLGBRCklJalqKHzjQ0SJACP4BHrSJJJKXftA1j1crIFvAORUenq4keRLN82HXlTBlfuTxoCXtzw_wcBhttp://www.phytools.com/Kvaser_Leaf_Light_V2_CAN_USB_Interface_p/KV-00685-0.htm?gclid=CjwKEAjw8OLGBRCklJalqKHzjQ0SJACP4BHr6I28-DQ1ZrRyEoEMgs_cQJXL-NXiEqsN08nayTaq6hoCrmrw_wcB

author: gedass2000
author_rank: Contributor
timestamp: February 16, 2019, 08:50:19 pm
content: TouCAN USB to CAN converter from Rusoku:https://www.rusoku.com/productsThey use open source CANAL interface.
ATEN 1102CAL - Page 1
Forum section: electronics / testgear

author: Leonf
author_rank: Newbie
timestamp: February 10, 2019, 05:54:32 pm
content: Hi,Can anyone supply me with a manual for this oscilloscope? Mine is lost stolen or strayed!!ThanksLeon

author: tautech
author_rank: Super Contributor
timestamp: February 10, 2019, 07:46:32 pm
content: Welcome to the forum.Think I have some on CD from when I sold a few Atten but the are too large to add as an attachment.The Siglent CNL+ models are very close to the same (Plus models are a later version) so this one from Siglent sites should be just fine:https://www.siglenteu.com/download/2714/All the other manuals are available here:https://www.siglenteu.com/resources/documents/digital-oscilloscopes/#sds1000cml-seriesFYI, CNL. CML, DL and CFL are all quite similar units in that they could almost share the same user manual.

author: Electro Detective
author_rank: Super Contributor
timestamp: February 10, 2019, 10:54:47 pm
content: There might be a user manual PDF on the CD to 'borrow' and zip up perhaps ?

author: tautech
author_rank: Super Contributor
timestamp: February 10, 2019, 11:09:43 pm
content: Quote from: Electro Detective on February 10, 2019, 10:54:47 pmI'm quite sure a CNL manual will be more than adequate as after all they are the same scope as Atten CAL.

author: Leonf
author_rank: Newbie
timestamp: February 18, 2019, 03:26:27 pm
content: Very Many Thanks!!Looks good!Leonf
GWInstek GDM-8251A firmware file request - Page 1
Forum section: electronics / testgear

author: unimorpheus
author_rank: Regular Contributor
timestamp: March 06, 2017, 06:21:24 pm
content: Does anyone have the current firmware file for the GWInstek GDM-8251A? Emails to GW support go unanswered and firmware does not appear to be available on their support page. Thanks.

author: sequoia
author_rank: Unknown
timestamp: March 14, 2017, 08:00:14 am
content: Try emailing: services (at) goodwill.com.twI never got reply from some of their other email addresses either, but above address worked... (got reply in day or so).

author: unimorpheus
author_rank: Regular Contributor
timestamp: March 14, 2017, 02:41:06 pm
content: Thanks, actually received the file a day after I posted this.

author: Housedad
author_rank: Frequent Contributor
timestamp: March 14, 2017, 05:38:03 pm
content: Isn't the one available on their website the latest one?http://www.gwinstek.com/en-global/products/Discontinued_Products/Discontinued_Meters_LCR/GDM-8251A

author: unimorpheus
author_rank: Regular Contributor
timestamp: March 14, 2017, 09:00:57 pm
content: Quote from: Housedad on March 14, 2017, 05:38:03 pmYour link is incomplete. If you are looking at the support page the file referred to as firmware is not the firmware file, it is the serial comm software used to load the firmware file on the device. The file .hex has to be obtained from GwInstek.

author: aargee
author_rank: Frequent Contributor
timestamp: March 14, 2017, 09:12:37 pm
content: What is the latest firmware? 2.3?

author: usagi
author_rank: Frequent Contributor
timestamp: March 15, 2017, 10:41:46 am
content: mine says V2.11

author: unimorpheus
author_rank: Regular Contributor
timestamp: March 15, 2017, 03:43:09 pm
content: Quote from: aargee on March 14, 2017, 09:12:37 pmv230 appears to be the most current.

author: usagi
author_rank: Frequent Contributor
timestamp: March 20, 2017, 02:55:25 am
content: V230 firmware file attached.

author: Housedad
author_rank: Frequent Contributor
timestamp: March 20, 2017, 03:03:11 am
content: Thank You!!

author: coromonadalix
author_rank: Super Contributor
timestamp: February 16, 2019, 01:52:54 pm
content: keep it preciously, "they" seem to have removed it from their website
JDS2023 Handheld Multimeter oscilloscope combination - Page 1
Forum section: electronics / testgear

author: RyanMc50
author_rank: Newbie
timestamp: February 13, 2019, 08:13:27 pm
content: Hi all,I'm in the market for a cheap (<120 euros) oscilloscope. As an electronics student who sometimes does repairs for a little extra cash, I often find my workstation moving and so I need to gain access to a basic oscilloscope that I can carry around just for a quick look at some waveforms.I was looking at the JDS2023 as a potential candidate and was wondering if anyone on here had any experience with it or could recommend a better product in the same price range? I don't normally have to scope signals above about 1MHz so I'm not looking for anything that fancy, just functional and reliable.I should also say I have an old 2 channel 20MHz analog oscilloscope on my bench which has been more than adequate for years, just thought it would be nice to have a handy handheld digital storage type scope.Any advice would be greatly appreciated.

author: Microcheap
author_rank: Frequent Contributor
timestamp: February 14, 2019, 01:29:46 am
content: I don't know the jds2023 but I recently got one of the new Hantek 2d42 and I am actually liking it. It has a 2ch oscilloscope (40MHz or 70MHz BW), multimeter and AFG functions (there is also a C model with no AFG) and, at least on paper, it presents some slightly better specs than the jdsFor price reference:https://www.aliexpress.com/item/Hantek-3in1-2D72-250MSa-S-Digital-Oscilloscope-Waveform-Generator-Multimeter-USB-Portable-2-Channel-40mhz-70mhz/32961503018.htmlThe manufacture page:http://www.hantek.com/en/ProductDetail_1_13174.htmland a thread about the product:https://www.eevblog.com/forum/testgear/hantek-2c422c722d422d72/Another option could be an USB scope like the Owon VDS1022i or Hantek 6022BE, but then you will need a laptop or pc to use it.
8642A Generator - Incorrect Atten Activation - Page 1
Forum section: electronics / testgear

author: MikD
author_rank: Newbie
timestamp: February 14, 2019, 10:00:47 pm
content: GENERATOR BACKGROUND:Model: 8642A, S/N: 2816A02298, F/W: 871028Opt: No label on back of instrument; Service menu reports A02 which I believe indicates just standard configuration.The attenuators are Opt75(5, 30, & 40 dB) and Opt15(10, 20, & 40 dB).- The back-up battery was dead; I wired in a NiCad 4.5V battery pack, and downloaded calibration data from the A20 to A3 assembly. But the problem described below was present before and after recovering calibration data.- Passes all self-tests.- Aside from described amplitude problem below, the8642A works perfectly.PROBLEM: All amplitude settings (from front panel or over HPIB) from -15dBm down are low by either a fixed 10 or 20 dB. I found that the 30dB attentuator gets activated in place of the 20dB. Also appears that at some lower levels a 40 dB attenuator is activated in lieu of the 30dB. Tested outside the instrument, all the attenuators, yield the expected attenuation.I found that regardless of amplitude set by the user, the A3/A4 assys never activate the ATN3 line (20dB atten), and so the 20dB attenuator never gets activated.As an example, when user sets amplitude to -15dBm, the point at which the 20dB should kick in, the A3/A4 activate the ATN2 line which activates the 30dB atten. Hence -15dBm level setting results in -25dBm output. There are other improper combinations getting activated, but the 5dB, and I believe the 10dB, always gets activated correctly according to the user's amplitude setting.I thought the culprit might be the latch decode circuitry on the A4 assembly, but using the service routine to check each Latch Bit  through  for ATN0-ATN5, I could manually set each of the latched ATN lines high or low inidicating the decoding and latching was working properly.So, at this point, as unlikely as it may seem, I'm left with the opinion that the problem is actually in the firmware and not related to any IC or mechanical problem.I would be appreciative to hear from anyone that might have some insight into this problem, or perhaps some additional testing suggestions that might narrow down the matter.I made binary images of the EPROMs (listed below) which I can share if helpful.U23: 08642-80688 CS:0501, U24: 08642-80689 CS:CE01U25: 08642-80690 CS:9001, U26: 08642-80691 CS:1A01U27: 08642-80692 CS:F101, U28: 08642-80693 CS:6901U32: 08642-80694 CS:2001, U33: 08642-80695 CS:9B01
Keysight U8001A - Page 1
Forum section: electronics / testgear

author: metrologist
author_rank: Super Contributor
timestamp: February 12, 2019, 06:26:50 pm
content: I see one open box "new" listed for $180 firm.I was almost there with getting the popular Rigol. Is this a good enough deal to postpone or cancel that? I don't really need triple output, but remote control would be handy.I think I'm only lured by the name and price if it is like new. Would you?

author: metrologist
author_rank: Super Contributor
timestamp: February 12, 2019, 11:43:51 pm
content: I thought I was going to buy it. Stopped at the bank and got the cash, but I am having second thoughts. It looks like a good clean supply from what I can tell, but that aspect is probably beyond my caliber. I don't think I can warm up to the price of the Rigol, however. I could probably live with an RD Tech DC-DC inverter if I could live with this.
Probes: HANTEK PP-200 vs PP-150 - Page 1
Forum section: electronics / testgear

author: exe
author_rank: Unknown
timestamp: August 02, 2017, 05:56:42 pm
content: Hi guys!Does anyone have experience with PP-200 probes? I can't find anything about them. It looks like PP-150 are widely recognized to be "good and cheap", but PP-200 look even better in specs(I mean BW at 1x attenuation). They are also twice more expensive...

author: exe
author_rank: Unknown
timestamp: August 02, 2017, 07:39:58 pm
content: Huh, I think there is sort of confusion. One e-shop shows that more expensive probes have better 1x specs, but this contradicts the "official" site (http://www.hantek.com/en/ProductDetail_15_73.html). It looks like the 1x performance is identical on these probes. So, I think this answers my question. PP-200 won't make my life better comparing to PP-150.

author: GilbouFR
author_rank: Contributor
timestamp: February 16, 2019, 01:19:16 pm
content: PP-150 is the one you get with the 100 MHz modelPP-200 is the one you get with the 200 MHz modelSo I guess the 200 model will go up to 200 MHz where the 150 might not/won't ?

author: GilbouFR
author_rank: Contributor
timestamp: February 16, 2019, 05:46:48 pm
content: Models : PP80, PP90, PP150, PP200All of them are 6 MHz when set to x1 so there is no differenceThe difference appears when they are set to x10 :PP-80 = 60 MHzPP-90 = 80 MHzPP-150 = 100 MHzPP-200 = 200 MHz

author: joeqsmith
author_rank: Super Contributor
timestamp: February 16, 2019, 06:21:56 pm
content: I bought some of the 150s about 4 years ago and use them a fair bit. They continue to work fine and I can't understand how they could sell them so cheap.I made a video where I compared them with some other probes. I have not tried the 200 but I wonder now if the quality has suffered to keep the price down. It will be interesting to see how they compare if someone decides to run them.https://youtu.be/buG-H_LZH0U?t=396
New Keysight 4 channel DSOX1204G - Page 1
Forum section: electronics / testgear

author: odessa
author_rank: Regular Contributor
timestamp: February 13, 2019, 08:02:22 pm
content: Hi,I've been considering buying the new Keysight DSOX1204G 100 MHz 4 channel scope when it comes out. My question is, does anyone know if the serial decode option is included in this model or is it an option ??http://www.farnell.com/datasheets/2714341.pdfData sheet is a bit confusing as it looks as if its an option on 2 models and included on the other 2 ?Anyone have any info on this ?Thx

author: HighVoltage
author_rank: Super Contributor
timestamp: February 13, 2019, 08:05:46 pm
content: It looks like that is an upgrade:Upgrades:I2C + SPI +RS232protocol decoding licenseCAN + LIN protocol decoding license100 MHz bandwidth200 MHz bandwidthhttps://www.eevblog.com/forum/testgear/new-keysight-4-channel-scope-(1200-x-series)/

author: odessa
author_rank: Regular Contributor
timestamp: February 13, 2019, 08:08:59 pm
content: Doh!Totally missed that thread, cheers
Trouble with LISN noise - Page 1
Forum section: electronics / testgear

author: Larry80
author_rank: Contributor
timestamp: February 12, 2019, 01:47:00 pm
content: Hello,I am trying to do pre-compliance measurements with new Tekbox TBLC08 LISN and i have some sort of interference problem with the equipment. Other channel picks up broadband high-intensity noise (overloading the ADC) raging up to 1Mhz.Let me describe the connections:- No equipment is connected to the LISN, the EUT socket is empty- Direct dedicated power supply, connected next to the PE-N junction (at the meter). 0.3 Ohms N-PE resistance at the socket end- No isolation nor fault protection- Besides LISN, the spectrum analyzer shares the supply socket. As you know, they must share the same ground path and trying on any other socket is not possible.- This power node is also first at the 20kv transformer, nobody is effectively sharing "my" utility cables in between.- Grounding strap is connected with bolt to the metal ground plane sheet and has connectivity when measured (supply socket to plane)What i have tried:- Noise can be found either at 0 or 1, depending on which way the LISN is plugged in. Spectrum analyzer socket orientation has no effect.- Other channel is at background level.- Noise is also unaffected by turning off the main power switch, reliably disconnecting all other devices from this power node (no lights etc.) Only the power meter is (unfortunately) still connected besides the required test equipment.Any ideas? Seems like all there is to try out is a safety isolation.Update: Connecting 500W load to the output did nothing, so it is not a feature of idle LISN. Also checked the polarity and unsurprisingly noise is picked up at the L- side.
Any experience/review of DigiView DV509/DV518? - Page 1
Forum section: electronics / testgear

author: kahuna0k
author_rank: Regular Contributor
timestamp: February 11, 2019, 07:00:27 pm
content: Hi,After Saleae prices skyrocketed, I'm no longer interested in their Logic Pro 16, and looking around I've found this:http://www.tech-tools.com/DV518-logic-analyzer.htmSeems pretty decent, with up to 1Gbps with 4 channels, 20V tolerance, 128Mbit memory and USB3 for streaming. I've not found any reviews or anything here about those models. Anyone with any experience?

author: mroek
author_rank: Contributor
timestamp: February 11, 2019, 07:34:47 pm
content: I have one of their older models (DV3100), and while it works fine, I will admit I have never been able to like their software. It is powerful, but in my opinion it is somewhat complicated and unintuitive in use. Just my 2 cents, you may like the software better than I do.
HP 8594E Option 101 and 151 - Capabilities? - Page 1
Forum section: electronics / testgear

author: SaabFAN
author_rank: Frequent Contributor
timestamp: February 07, 2019, 06:58:44 pm
content: What do these two Options offer in terms of capabilities?I'm looking to buy a 8594E, but as also need a SpecAn for EMC-Compliance measurements I also need a Quasi-Peak Detector. A feature basically all the SpecAn offers on Ebay lack.Would you say the features of the Option 101 or 151 make up for the lack of a Quasi-Peak detector? Is it maybe possible to program the DSP of the Option 151 to implement a digital Quasi Peak-Detector?My Budget is a bit limited (about 900€) and I need an upper Frequency-Limit of 3 GHz or better, so a Spectrum Analyzer made by Rigol, Owon or Siglent is not an option.Anyone here who can share some tips or experiences on this topic?

author: EE-digger
author_rank: Frequent Contributor
timestamp: February 11, 2019, 11:53:10 am
content: Option 101 is good, 151 I'm not sure about. It may help with low frequencies when the analyzer switches to FFT mode.If you can find one with the low RBW option, I think that it can be very useful, especially when attempting to make a (somewhat) accurate frequency measurement with an external reference.That said, I seldom use QP for EMC. If you do a prescan with the peak detector and find that you are within limits, you won't need QP. Of course, this will depend on the nature of the emissions your product / design produces. If you fail with a spectral component that has a low duty cycle, then the QP detector would knock that down, sometimes by a large margin.
121GW why no open source? - Page 1
Forum section: electronics / testgear

author: dav888
author_rank: Regular Contributor
timestamp: February 10, 2019, 09:55:18 am
content: Hi, I might have totally missed out, but wasn't the 121GW firmware supposed to be open source!?I can see all efforts going on reverse engineering it. I see two better options1) EEV to release the original source for the 121GW.2) Create a new multimeter hw+sw from scratch instead of spending time reverse-engineering??

author: Brumby
author_rank: Unknown
timestamp: February 10, 2019, 11:08:21 am
content: The firmware is not open source. Dave would have liked that - but the manufacturer is coy about revealing "secret sauce" routines. In other words - Dave doesn't have it to make it available for "open source"Reverse engineering allows taking functional software and investigating what various sections of code do. You can then play with a part and see how it affects operation. This is a slow way of learning what the software can do - and it will still miss out on hardware functionality that may be available, but not exercised in the existing software.Writing software from scratch will require a full mapping of the hardware, which will include knowing how to configure everything.Creating a DMM with the resources of UEI behind the development was a multi-year project. If you were to spin a completely new meter with full control of the software, you are going to have along and difficult journey.

author: Fungus
author_rank: Super Contributor
timestamp: February 10, 2019, 11:12:17 am
content: Open source mods would nullify the CAT rating.

author: EEVblog
author_rank: Unknown
timestamp: February 10, 2019, 12:04:54 pm
content: Quote from: dav888 on February 10, 2019, 09:55:18 amNo, it was not, and that was never promised.That was the hope though, but the manufacturer ultimately said no.QuoteI do not own the firmware source, it's not my decision to make.I do however own the PC/android/iphone application software though which has been released open source. We rewrote that one completely from scratch and did not use any of the original app code.QuoteGood luck!(Sarcastic because I know how much work is involved)
Meaning of beep warning on Siglent SPD1168X DC power supply - Page 1
Forum section: electronics / testgear

author: jimminyjosh
author_rank: Newbie
timestamp: February 09, 2019, 10:47:24 pm
content: Hi,I was connecting probes from my shiny new Siglent SPD1168X power supply to drive a 3V COB LED. The connection wasn't great - I was pressing probes to the pads on the led board so it was intermittent. The Siglent would beep when I fiddled with the probes and started humming. I disconnected the probes and waited, and after a number of seconds of being left alone, the humming stopped accompanied by a final beep. I couldn't see any error message on the screen.Any idea what the beeps mean? I couldn't find any mention in the manual, and even dug up the manual in Chinese (which I can't read) to see if I could discover any clues.Thanks for any suggestions.Cheers,Josh

author: tautech
author_rank: Super Contributor
timestamp: February 09, 2019, 10:59:00 pm
content: Welcome to the forumDunno.It's not switching between CV and CC modes is it ?Just make sure you have a little more current dialed in than the expected load so it doesn't jump between CV and CC modes.I have one boxed that I can get out and check if nobody comes to your rescue.Have a look at Defpoms review to see if it has the same behavior:

author: jimminyjosh
author_rank: Newbie
timestamp: February 10, 2019, 01:14:18 am
content: Hi, thanks for the suggestions. My unit does switch between CV and CC, but the beeps don't seem timed with those switches. And the unit in the video also doesn't beep either when switching between CC and CV.
AutoProbe lite provide offsets on 3000 X /T ? - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: February 10, 2019, 01:05:13 am
content: Question re-phrased:Are there any probes for which the 3000X or 3000T expose a probe offset control? Is the hardware even present?I got excited when I found the offset control that pops up when you touch the channel area at top of screen, only to find out it was the same as the vertical position control.BTW, if you want to play with probe multipliers and termination, use a 121K resistor for ID. Now the scope thinks it has an N2744A Tektronix probe adapter attached, and lets you choose from the entire range of support Tek probes. I did not see an offset control appear for any of the Tek probes but need to check again.
HP-8591E changing video/processor board - Page 1
Forum section: electronics / testgear

author: lu8egb
author_rank: Newbie
timestamp: February 09, 2019, 02:43:20 am
content: Hello everybody,Apparently I have damaged the A16 video / processor card. I have the possibility of getting a used one from another analyzer.I understand that there is inside some factory cal information within each SA, what would be the procedure to follow?Any guideline will be appreciated.Thanks for watching.Ariel.
Oscilloscope Probe - Page 1
Forum section: electronics / testgear

author: tvl
author_rank: Newbie
timestamp: February 08, 2019, 02:30:15 am
content: Remove

author: james_s
author_rank: Super Contributor
timestamp: February 08, 2019, 04:39:08 am
content: There are any number of probes that will work, just keep in mind that many low cost probes don't come close to meeting their printed specifications.No problem at all with mixing and matching probes, just adjust the compensation of the probe on the channel you're using it on.

author: Electro Detective
author_rank: Super Contributor
timestamp: February 08, 2019, 05:15:09 am
content: ...and label the compensated probe/s to the respective channels, so you don't have to do it every timei.e. if you compensated both the 10x and 100x probes to Channel 1, then only use them on Channel 1.Sometimes you get real lucky, and all the probes and channels are pretty close in compensation, so you can plug any probe into any channel

author: james_s
author_rank: Super Contributor
timestamp: February 08, 2019, 05:16:40 am
content: Most of the time I find they're close enough that it doesn't really matter, but it's still good practice.

author: Fungus
author_rank: Super Contributor
timestamp: February 08, 2019, 06:17:29 pm
content: Quote from: tvl on February 08, 2019, 02:30:15 amYes.Quote from: tvl on February 08, 2019, 02:30:15 amNo.PS: Get it unlocked!http://www.gotroot.ca/rigol/riglol/(use option DSER, even though it's not listed there)

author: alm
author_rank: Super Contributor
timestamp: February 09, 2019, 10:22:01 am
content: Quote from: tvl on February 08, 2019, 02:30:15 amSure. Just make sure the compensation range includes the nominal input capacitance of the scope. If a probe is specified for 15 pF - 35 pF, then a scope with an input capacitance of 15 pF or 20 pF should be fine, but it may not compensate to a scope that has an input capacitance of 12 pF. Actually bandwidth is not all that important: A probe with less than 50 MHz bandwidth will work just fine, but will reduce the total available system bandwidth, which may be fine for some applications. A probe with more than 50 MHz bandwidth will not improve performance (scope will limit system bandwidth), but will not do any harm either.Quote from: tvl on February 08, 2019, 02:30:15 amMixing probes (brands or attenuation) between channels is perfectly fine. Two cases where the difference could matter (both are rare):Cable length may introduce channel skew (visible for high frequencies), if you measure a pulse with two probes with different cable lengths, the rising edge on one channel may be a few nanosecond before the other channel, especially if the difference is large (one cable is 1 meter, the other 3 meter).If you are trying to subtract two channels for a differential measurement, you want the probes attenuation, skew and frequency response to be as close as possible. This generally means identical models.
Rigol ds2102e CAN decode - Page 1
Forum section: electronics / testgear

author: rockfishon
author_rank: Newbie
timestamp: February 08, 2019, 05:20:33 pm
content: Is it possible to CAN decode the "A-B" math signal on a Rigol DS2102E? I just purchased a new DS2102e and am trying to use it to decode potential issues on my Chevy CAN bus. It seems that the decode can only be applied to CH1 or CH2 unless I am missing something.

author: TurboTom
author_rank: Super Contributor
timestamp: February 09, 2019, 12:46:57 am
content: At least on an MSO2**2A-S it's not possible to select math as an input to a decoder. I'm afraid the only way to analyze a differential signal on one of these Rigol scopes with their protocol decoders would be to use a "proper" differential probe.

author: JDubU
author_rank: Frequent Contributor
timestamp: February 09, 2019, 01:26:12 am
content: What about adding a CAN transceiver eval board to do the differential to single ended conversion?For example:https://www.amazon.com/gp/product/B00KM6XMXO/ref=crt_ewc_title_huc_1?ie=UTF8&psc=1&smid=A50C560NZEBBE

author: Romain
author_rank: Regular Contributor
timestamp: February 09, 2019, 01:32:58 am
content: If you're just after decoding the bus, then simply decoding A should be enough to retrieve the packets.However, you could use a CAN transceiver, or a simple op-amp if you're after the differential signal.
Problem with DS1054 - Page 1
Forum section: electronics / testgear

author: Doogs
author_rank: Contributor
timestamp: February 07, 2019, 10:18:46 pm
content: I fired up my DS1054 (hacked) today to test an Arduino RF tx/rx circuit and at boot-up my scope was showing a sine wave of 100mv p-p ac amplitude and a duration of 20ms duration (60Hz) which indicates mains power interference which it's never done before. I tested all four channels with all the probes separately, and it was the same signal on all of them, the signal does disappear when I disconnect the probes. The probe calibration signal is showing 1khz at 3 volts dc with a 500us @ 50% duty cycle square wave so that looks normal. I also disconnected power to all my test equipment and my laptop with no change. I tried a self calibration and no change. I'm stumped so if anyone has any ideas it would be appreciated.Update:I plugged my scope into the kitchen GFI with no change so tried my isolation transformer also no change, then tried the ungrounded receptacle on the Isolation transformer and the amplitude doubled to 200mv at the same frequency?!Interference on the neutral/ground possibly? I wish I had another scope to compare.

author: ataradov
author_rank: Super Contributor
timestamp: February 07, 2019, 10:42:51 pm
content: So what's the problem? Floating probes act like an antenna. This is the expected behavior.

author: Doogs
author_rank: Contributor
timestamp: February 07, 2019, 11:04:00 pm
content: I've never had them float at 100-200mv before! I would expect 20mv or lower which is usually where my scope starts getting noisy. Maybe I have a better spec'd scope... or used to.

author: ataradov
author_rank: Super Contributor
timestamp: February 07, 2019, 11:11:52 pm
content: It depends on a lot of factors, including tip orientation in the space, proximity to wiring in the wall, your body location, etc. It is unpredictable.

author: ElectronicCat
author_rank: Regular Contributor
timestamp: February 07, 2019, 11:16:55 pm
content: Yep, it's entirely normal to pick up AC noise from the environment like that. If you attach the probe to ground it should go away.I've once measured in excess of 1Vpp at 50Hz by using my body as an antenna coupling to the probe by touching it!

author: Doogs
author_rank: Contributor
timestamp: February 07, 2019, 11:33:33 pm
content: Thanks for the replies lads:Whatever it was it's back down to the 20mv range. I realised we had some freezing rain last night and I have some high tension lines outside the window which were pretty covered posssibly radiating more than normal (1.5 meters away) It's thawed up a bit so maybe that was it. I also had the grabber attached which adds a fair bit.Well I'm glad that is cleared up as I just lost my Spectrum Analyser (it won't lock) so I'd be bummed if my scope had of been on the way out. The SA is pretty damn old anyway (Anritsu MS2601A) and I can justify replacing it now.Cheers
Need help narrowing down my search for a DMM  - Page 1
Forum section: electronics / testgear

author: Tjj226_Angel
author_rank: Contributor
timestamp: February 06, 2019, 09:08:19 pm
content: So I have been reading through the various posts here on the EEVblog to try and figure out what the best DMM would be for my purposes.I primarily work on vacuum tube amplifiers. I am usually working with high voltage up to 1Kv (sometimes higher if I am feeling adventurous), DC current rarely exceeds 250ma, but AC current can go as high as 3A. I would like a meter that has 5.5 digits if not 6.5 so that I can accurately hand match resistors for 16 bit R2R ladder dacs (future project).Right now, I am really liking the fluke 45. It has a lot of extra features that I could really use. The dual display is certainly handy for biasing tubes, being able to look at frequency can help me identify and diagnose noise issues, and the db function is nice for a whole host of other reasons.My only issue with it is that its not quite as precise as the fluke 8842 or other meters like it.Is there a big brother to the 45? My budget is about 300 bucks, but I can be convinced to go up to 400.

author: kj7e
author_rank: Frequent Contributor
timestamp: February 07, 2019, 02:38:15 am
content: https://www.ebay.com/itm/Siglent-SDM3055-Precision-Desktop-Digital-Multimeter-AC-DC-Volt-Amp-Hz-Temp/254109492164?epid=1939958603&hash=item3b2a1b23c4:g:QhAAAOSwXTVcWIfR:rk:1:pf:0
My new toy!  HP608E - Page 1
Forum section: electronics / testgear

author: tkamiya
author_rank: Super Contributor
timestamp: February 06, 2019, 03:42:26 pm
content: Yay. I just took a delivery of HP608E signal generator. Currently, all it does is to turn on pilot lamp. I guess I have work cut out for me. Yes, I am fully aware of high voltage. I had HP608D long time ago.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: February 06, 2019, 03:54:17 pm
content: Wish you lots of fun with you new toy.Is there any question in your post?

author: tkamiya
author_rank: Super Contributor
timestamp: February 06, 2019, 03:58:18 pm
content: Nope! Just showing off....

author: Doctorandus_P
author_rank: Super Contributor
timestamp: February 06, 2019, 04:09:52 pm
content: You made me curious.https://www.radiomuseum.org/r/hp_vhf_signal_generator_608e.htmlTo me it looks like an excellent paper weight:28 kg / 61 lb 10.8 oz (61.674 lb)I think you and I have slightly different hobby's

author: Yansi
author_rank: Super Contributor
timestamp: February 06, 2019, 04:12:57 pm
content: Beware that Keysight/Agilent/HP might confiscate your generatorhttps://www.eevblog.com/forum/testgear/keysight-ip-intimidation/msg2148307/#msg2148307

author: tkamiya
author_rank: Super Contributor
timestamp: February 06, 2019, 04:18:04 pm
content: How much does your signal generator weigh?My main one is HP8644A and B. They weight 30kg each. This is a fully synthesized sigGen from mid 80s to early 90s I think?One neat thing about HP608 is I can set it to non-modulated CW and SCREAM into vent on the outer case. It modulates the carrier! Way back when, I hooked it up to an antenna (I am a licensed ham), set it to ham band, and had a contact using this thing. That was funny.
Test crystal 16kihz - Page 1
Forum section: electronics / testgear

author: bullonwheels
author_rank: Contributor
timestamp: February 06, 2019, 05:31:49 am
content: Hello All,How do I test the 32kiHz crystal if it is active or not ?Also, how do I test individual gpio's which is pulling high current ?I see a MCU ARM controller at 1.9 gets into high current consumption mode.I want to find out how and why ?

author: Fungus
author_rank: Super Contributor
timestamp: February 06, 2019, 07:12:53 am
content: Quote from: bullonwheels on February 06, 2019, 05:31:49 amWith an oscilloscope.Quote from: bullonwheels on February 06, 2019, 05:31:49 amA GPIO can only pull high current if something is attached to it and software makes it active.
Oscilloscope Leader 3060D - Page 1
Forum section: electronics / testgear

author: Mortymore
author_rank: Frequent Contributor
timestamp: February 06, 2019, 08:30:37 pm
content: Hi!I have a dead DSO Leader 3060D lying around for some years now.At the time I tried to find a service manual, and now and then I remember to renew the search. I even asked for it to a YouTuber showing one and to a seller on Ebay, but didn't got any answer. So... I'm here to try my luck.I found some stuff regarding oscilloscopes and the reference 3060D, but none of my findings were related to scope I have in hands.The scope was from a friend, and I saw it working for brief minutes, and suddenly it went off to never work again. My friend gave it to me for parts or whatever.It has a PSU problem for sure because even the Power LED lights ON.He has a NiCD battery if I recall correctly, that must be long gone by now.Hope it's not an HV PSU or CRT problem... but, without a schematic and lacking expertise in this area I don't have the conditions to try to repair it. Though I never really gave up.Attached 3 photos. One found on the web of a working unit, and the other 2 from when I opened it some years ago.I don't know when will I have the time to try to repair it, but If someone has a schematic, a service manual, or any idea were I should poke around to see some "usual" known fault, I'd be much appreciated.PS: There's an 100MHz version of the scope, model 3100D.EDIT: Attached a PDF with a rouge Google translation with some information on LEADER 3100D found here:http://nice.kaze.com/av/3100d-no2.html

author: JeanBaileg
author_rank: Newbie
timestamp: February 07, 2019, 05:10:44 am
content: Hindi sigurado kung paano tutulungan ako? Tungkol sa kaalaman na hinahanap ko, patuloy kong ibinabahagi ang impormasyong ito.
Siglent SDS1104X-E LIN decoder doesn't decode frames with zero-length response - Page 1
Forum section: electronics / testgear

author: Yannik
author_rank: Unknown
timestamp: February 01, 2019, 11:21:22 pm
content: I've recently purchased a Siglent SDS1104X-E to analyze a LIN-Bus.Even though the scope works fine in general, I found a bug in the LIN decoding. Frames with 0-length frame response data are not decoded correctly:You can see the Sync Break Field, the Sync Break Delimiter, Sync Field and the Identifier in this screenshot. The frame response has length zero.Normally, the data is decoded like this (bottom part of the screen):When examining a unknown protocol, it's pretty important to see all the data transmitted on the bus, including frames with a 0-length response. (Sometimes, especially those!)Anyone else who experienced this bug?What would be the best way to report this to siglent?

author: tautech
author_rank: Super Contributor
timestamp: February 02, 2019, 09:11:39 am
content: Shoot an email through to the Hamburg office and link them to this thread.info-eu@siglent.com

author: Yannik
author_rank: Unknown
timestamp: February 05, 2019, 10:11:06 pm
content: I got a reply from siglent eu today. They will forward the issue to their chinese developers. I'll report back once I get any news on this.
HP 8656B "Reverse Power Condition" - Page 1
Forum section: electronics / testgear

author: FenTiger
author_rank: Regular Contributor
timestamp: February 03, 2019, 11:06:26 am
content: Hiya,I bought a HP 8656B signal generator from Ebay. When I try to use it, sometimes the amplitude section of the display starts to flash.The manual says (on page 3-19), "Whenever a reverse power condition is detected, all segments and all LED annunciators associated with the AMPLITUDE Display flash until the source of reverse power is removed and the AMPTD key is pressed."This is exactly what's happening to me.What does it mean by a "reverse power condition"? My first thought was that the VSWR is too high, but it will happily run without anything connected to the output at all, so I don't think that can be the case.It's connected to a purely passive circuit (a filter that I'm trying to tune) so it's not that I'm somehow trying to "transmit" back into its output.Any suggestions?

author: 0culus
author_rank: Super Contributor
timestamp: February 03, 2019, 07:25:29 pm
content: My 8657A has done this when connected to a counter before. It's supposedly good to 50W 50Vdc reverse power; no way a counter is providing that much reverse power, perhaps a logic fault?

author: RFDUK
author_rank: Regular Contributor
timestamp: February 04, 2019, 12:25:49 pm
content: This is perhaps only when the output level is turned up near max??I think you may be on the right track considering high vswr.As you tune the filter the sig gen output will be presented with a high vswr at a wide spread of phase angles, some perhaps inducing a trip point.If this is the explanation, connecting an external 10dB pad on the generator output before your filter under test should make the 8656B happy.Good luck.

author: FenTiger
author_rank: Regular Contributor
timestamp: February 04, 2019, 12:56:53 pm
content: It was set to -10dBm at the time, and turning it down to -30dBm did seem to make it a lot more reliable.But if it was a VSWR problem, wouldn't it behave like this with the output disconnected? That's as badly mismatched as it can get, but I can turn it up to +17dBm without triggering this problem, suggesting that it's quite happy with its own reflected power. (Maybe I should try it into a short, to see if the phase makes a difference?)I had another thought, which was ESD. If I managed to accumulate a static charge, and discharged myself into the filter, this could have excited the first resonator and sent a brief pulse of RF back up the cable towards the generator's output. This wouldn't explain why turning the power down seemed to help, though, so I'm still puzzled.Of course, being a second-hand unit from eBay, it might just have a minor fault.
R&S FSL -> Possible Easter Egg - Page 1
Forum section: electronics / testgear

author: CrazyTiger
author_rank: Regular Contributor
timestamp: February 05, 2019, 03:58:21 am
content: Hi,Today while contemplating on getting a new spectrum analyzer with a demodulation capability, something like datasheet below:https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/FS_K7_dat_en.pdfI figured lets try to hack my FSL3 to see if i can enable the option, sadly i did not achieve that but i did enable the power meter option,FSL-K9.Turns out R&S packed the frequency alignment software within their FSL firmware itself, its in:C:\Program Files (x86)\Rohde-Schwarz\Instrument\bin\FSLCorrDataAcquisition.exeNow here is the fun part, by just opening .exe in plain notepad, reveals some of the service functions being used, the one in our interest is:line 1133: Enable powermeter ... diag:serv:sfun? '1.99.2.1.1'Here is how I used it :This is before:Step 1:Enter the service password: 894129, can get there by hitting setupStep2:Enter the Service Function 1.99.2.1.1Now the outcome :I dont have R&S Sensor to try it, but i believe it should work, only downside is, the function goes missing after a reboot, and you have to redo all the step again to get it back.Hope this will be useful, and i will try to check what else we can enable