hybridfree/eevblog-posts huggingface dataset:
Chinese XJW01 LCR digital bridge - Page 1
Forum section: electronics / testgear

author: Specmaster
author_rank: Super Contributor
timestamp: January 24, 2017, 12:37:23 pm
content: I have been reading through all the threads on here with regard to this LCR meter, having just purchased one following seeing a video on YouTube about this, I was impressed with its accuracy.However, the manual the manual was missing from (as was a UK power lead!!) and the controls are not exactly logical to say the least, so I was wondering if anyone here has now purchased one of these beasts and could point me in the right direction on the best way to use it?There is a calibration menu on the screen but how to calibrate it is not made clear at all. I did approach the Chinese vendor and they supplied the following link to download a manual, which is as clear as mud.https://www.adrive.com/public/ffNYtG/LCR.docThe unit was supplied with a Chinese power lead, despite being shipped to the UK? When contacted, the vendor stated that they did not have a UK power lead? But did offer a £3 refund which was helpful, it paid for a new plug top ha ha.The unit is clearly a handmade unit, at least the case is and it makes no attempt to disguise the fact but for the ease of reading the display and its accuracy, especially given its low price point against units costing many times its selling price, its liveable with.

author: nctnico
author_rank: Super Contributor
timestamp: January 24, 2017, 01:29:11 pm
content: Yeah none of the buttons do what you expect. IIRC the X button selects between auto, R, L and C. The F button switches the frequency range. You have to figure out how the device works 'monkey style': just push the button and note what happens. Still it is a good instrument to have due to it's pretty good accuracy even for low values.

author: buildafriend
author_rank: Newbie
timestamp: June 13, 2018, 04:53:17 pm
content: Tell me more please! The functions of each button makes no sense to me yet

author: SteveSi
author_rank: Contributor
timestamp: October 01, 2019, 07:34:44 am
content: https://youtu.be/NgSRAg9lLYg

author: drumbum
author_rank: Contributor
timestamp: October 01, 2019, 05:30:38 pm
content: Quote from: SteveSi on October 01, 2019, 07:34:44 amThanks for this.
Agilent 34410A: What PC software for datalogging? - Page 1
Forum section: electronics / testgear

author: Illusionist
author_rank: Regular Contributor
timestamp: September 30, 2019, 06:57:52 pm
content: I just bought a 34410A, partly for 6.5 digits and partly because I needed something that could do long (like 24 hours) logging to the PC.Despite trying to do my pre-purchase research, I've hit a snag. The Benchvue software, even the free 3.7 version from before the licensing changed to paid, only allows one hour of logging unless I pay for a 'pro' license. Gits! Now I find out!So, are there any other options? Free ones, that is; skint hobbyist here (more so now I've bought the meter). I even briefly considered trying to make sigrok work with it (it has the 34401A and 34465A) but I won't live long enough for that, I don't think.

author: TheSteve
author_rank: Unknown
timestamp: September 30, 2019, 07:02:43 pm
content: The 34410A (which can be modded to a 34411A) has a wonderful network port. So if you have a raspberry pi or even a desktop PC you can log data with a python script.Many users here are logging data with it 24/7.I know there are sample scripts floating around, the metrology section is a good place to start.

author: Illusionist
author_rank: Regular Contributor
timestamp: September 30, 2019, 07:06:09 pm
content: Interesting! I did search, but didn't come up with anything useful although I did notice some talk about upgrading to the '11A.I'll try searching harder...

author: tszaboo
author_rank: Super Contributor
timestamp: September 30, 2019, 07:14:34 pm
content: If you just need something to log a bunch of data, there is an Excel plugin which does that.Or python indeed. Takes about 10 lines of code to do datalogging through ethernet.

author: Illusionist
author_rank: Regular Contributor
timestamp: September 30, 2019, 07:19:40 pm
content: That's really all I need. I can process and graph the data in excel.I'm working my way through this thread I just found:https://www.eevblog.com/forum/metrology/3458a-logging-via-windows-app-revisited/?allAny other pointers to scripts (python/excel/whatever) are most welcome

author: HighVoltage
author_rank: Super Contributor
timestamp: September 30, 2019, 07:43:47 pm
content: Agilent had a logging software, before it became BenchVue.It was free and had no limitations and worked on the 34410AIt still works well, just no longer available from Keysight.

author: Illusionist
author_rank: Regular Contributor
timestamp: September 30, 2019, 07:57:44 pm
content: @HighVoltage,any idea where I might find that software?I guess it's this one:https://www.eevblog.com/forum/testgear/looking-for-agilent-dmm-connectivity-utility-software/I've just found and installed the (old) Agilent IntuiLink tools for MS office, which looked hopeful, but it seems that only works with GPIB or serial. D'oh!
Just scored a Dynaload RBL 100-600-4000 on eBay. How did I do? - Page 1
Forum section: electronics / testgear

author: Bobertsawesome
author_rank: Regular Contributor
timestamp: September 30, 2019, 12:40:43 am
content: Won the auction with a bid of $560+$95 shipping so $700 overall including tax. These units are going for $2,000+, so if I can't find a use for it I will likely resell.AcroBrwEx_7335_rbl_series_4000w.pdf_ADW3DC1.tmp.pdf(408.3 kB - downloaded 236 times.)
[Oscilloscop] What do you think about SIGLENT SDS 1052Dl and could it be hacked? - Page 1
Forum section: electronics / testgear

author: NiHuShu
author_rank: Newbie
timestamp: September 29, 2019, 06:58:19 pm
content: So I can buy a Siglent oscilloscope, almost brand new for 200$. It's a 50MHz oscilloscope. I would prefer Rigol oscilloscope but it's just not possible to buy one in my country. If anyone used it I would really appreciate your opinion. I'm a beginner at electronics but I have my workshop. Would it be good enough for old computers (Commodore etc.)? Also, it's basically the same thing as SDS1102DL and maybe SDS1202DL. They look identical and have the same specs except for rise time and frequency. Do you think that it would just require software swap like in Rigol to get it to at least 100MHz?

author: tautech
author_rank: Super Contributor
timestamp: September 29, 2019, 08:08:55 pm
content: Welcome to the forum.See here for further info:https://www.eevblog.com/forum/testgear/siglentsds1052dlsds1102cmlhack/

author: tv84
author_rank: Super Contributor
timestamp: September 29, 2019, 08:20:05 pm
content: Quote from: NiHuShu on September 29, 2019, 06:58:19 pmI sent you a pm.
Rigol DL3021 for $89??? - Page 1
Forum section: electronics / testgear

author: jmoschetti45
author_rank: Contributor
timestamp: September 30, 2019, 02:47:59 am
content: I came across this while looking for a USB load tester:https://www.hyoushop.com/products/rigol-electronic-dl3021-programmable-dc--single-load-channel-?zenid=3nqshphh1a0k1ked0gmg7ppfi4I'd probably never need it, but considering the normal price of $499 (I have other Rigol gear which I'm rather happy with), should I just get it, or is this a too good to be true deal?

author: maginnovision
author_rank: Super Contributor
timestamp: September 30, 2019, 02:48:56 am
content: Definitely not going to result in you being happy.

author: jmoschetti45
author_rank: Contributor
timestamp: September 30, 2019, 02:51:25 am
content: Quote from: maginnovision on September 30, 2019, 02:48:56 amFigured. Just thought it was funny since I just watched Dave's latest video about 5 minutes prior to finding that.

author: ataradov
author_rank: Super Contributor
timestamp: September 30, 2019, 03:12:55 am
content: It suggests that customers also bought a toilet paper holder with the power supply. So yeah, I would not buy power supplies from people that also sell underwear.

author: ledtester
author_rank: Super Contributor
timestamp: September 30, 2019, 03:41:45 am
content: Some interesting things about this site:- I was unable to find it using their search tool (how did you find it?)- They cap your order at $100 (check done at checkout time):Quote

author: ArthurDent
author_rank: Super Contributor
timestamp: September 30, 2019, 04:24:38 am
content: Read this similar thread from this past July. It is a SCAM.https://www.eevblog.com/forum/testgear/kickass-deal-or-bs/
Siglent 1104X-E Acquiring Takes Forever  - Page 1
Forum section: electronics / testgear

author: JayMan07
author_rank: Regular Contributor
timestamp: September 29, 2019, 06:31:24 pm
content: First of all I'm pretty amateur when it comes to scopes. All my previous experience has been with a computer based pico scope.Recently I bought a Siglent 1104X-E and at longer times bases it seems to bog down a lot and say "Acquiring" and it takes forever to see the waveform...see the pic.When I was looking at a slow waveform on the picoscope I'd increase the time base in order to see it and then I'd lower the sample rate way down and it'd run just fine.What am I missing here?

author: Martin72
author_rank: Super Contributor
timestamp: September 29, 2019, 06:41:31 pm
content: Hi,What means "forever" ?It´s frozen ?

author: JayMan07
author_rank: Regular Contributor
timestamp: September 29, 2019, 06:50:10 pm
content: Well once I turn up the time base to over 200ms it says "acquiring" over and over then finally after like 10-15 seconds I'll see something on the screen but it's not in real time. Does that make sense?For example, I was looking at a rotary encoder and needed a long time base to see the signal. I turn the knob of the rotary encoder. The scope says "acquiring" then like 10-15 seconds later I finally see the square wave (see pic below). Also I doubt this matters but I am running the latest firmware on the scope. Why am I bogging down the scope so much. I think it auto adjusts sample size. What am I doing that is so demanding on the scope. All I'm trying to do is look at a relatively slow square wave.

author: tautech
author_rank: Super Contributor
timestamp: September 29, 2019, 07:15:42 pm
content: Roll mode of which there are 2 types, Auto and dedicated.At slow timebase setting the Roll button allows you to switch between each type.Take the time to try both and know how they each work.

author: JayMan07
author_rank: Regular Contributor
timestamp: September 29, 2019, 07:30:46 pm
content: tautech thank you!!! I was going crazy lol. A pico scope is literally always in roll mode so I didn't realize that I needed to manually set the siglent to that to see longer waveforms.

author: tautech
author_rank: Super Contributor
timestamp: September 29, 2019, 07:41:40 pm
content: Quote from: JayMan07 on September 29, 2019, 07:30:46 pm'It' can see the waveforms in either Roll mode, they just work differently.In Auto mode a full screen width of data relative to the timebase setting is acquired before anything is sent from the buffer to the display. A little math on timebase setting * 14 div will give you the time before the full capture is displayed and then the display is continually updated at that 'time'/div rate.Each has their advantages depending on what you need to do. The only thing to spirit away into gray matter is Roll mode starts at 50ms/div and slower timebase settings.

author: JayMan07
author_rank: Regular Contributor
timestamp: September 29, 2019, 07:51:46 pm
content: Wow that makes a lot of sense to me now...and just tried the roll mode and it is working perfect. Thanks again!!!
Updated, Custom Data-Logging Software for Mastech MAS345 - Page 1
Forum section: electronics / testgear

author: JP16A60
author_rank: Unknown
timestamp: June 20, 2016, 02:52:35 am
content: While searching for calibration guidance on my MAS345 (see my previous post), I ran across some nifty, custom data-logging software for this meter that will run on a modern, 64-bit OS:http://nooleanbot.blogspot.com/2013/07/mas-345-digital-multimeter-data.htmlHe's programmed it in Java, so in theory it should run with no problems on 64-bit Windows, Linux, and/or OS X.I haven't tried this, but will be doing so sometime soon.JPCincinnati, OHUSA

author: Marekbfm
author_rank: Newbie
timestamp: September 29, 2019, 08:18:54 am
content: HiDo you have this software? If you have, can you share?http://nooleanbot.blogspot.com/2013/07/mas-345-digital-multimeter-data.htmlweb address not workingMarekI found something like this, but I haven't tested it yet.https://libesz.digitaltrip.hu/mas-345/
MS2108 clamp meter, AC amps offset adjustment - Page 1
Forum section: electronics / testgear

author: lizard
author_rank: Newbie
timestamp: September 27, 2019, 11:31:46 pm
content: Dear All,Greetings - new here. Does anyone out there have any pointers to calibrating a Mastech 2108 clamp meter? Specifically, I'm trying to zero out an offset in the AC current range. For example, on power up and selecting ACA with a 3.5A current loop, the meter reads 3.8A. On removing the loop, the reading drops to ~0.3A (consistently). I did try with different loop currents and observed that the error is consistently close to the 0.3A offset. Unfortunately I could find no documentation on what trimpot does what. Any help/advice appreciated.Thanks,ff

author: shakalnokturn
author_rank: Super Contributor
timestamp: September 28, 2019, 07:34:43 am
content: I think getting to calibration mode involves moving a jumper inside, not sure about the cal procedure after that.Be aware that not knowing where you're going, you could make things a lot worse. You could end up with a so badly calibrated meter that you'll have to look for a better one. (The MS2018 is the worst clamp meter I've put my nose in so far...)
HP/Agilent/Keysight 66309D: Anyone ever use one as a current sink/load? - Page 1
Forum section: electronics / testgear

author: IDEngineer
author_rank: Super Contributor
timestamp: September 27, 2019, 05:35:12 am
content: On a 66309D, Output 1 is a two-quadrant supply. The manual specifically states it can be used as a current sink (though you cannot program the current level when sinking). However, the manual doesn't go into any details about how to use it in this mode.Before I take a chance and do something stupid... are there any tricks to doing this? Do you just set a "low voltage" and the unit will sink current in an attempt to "regulate" the sensed voltage down to your setting? You can't program the current level, but does it display how much current is being sunk?

author: nctnico
author_rank: Super Contributor
timestamp: September 27, 2019, 04:02:47 pm
content: Quote from: IDEngineer on September 27, 2019, 05:35:12 amJust set a lower voltage. I have the 66311B myself. I have the feeling these power supplies are designed to act as a battery from a mobile device. The current sink ability is just to sink the current from the charger circuitry.

author: IDEngineer
author_rank: Super Contributor
timestamp: September 27, 2019, 04:36:30 pm
content: Quote from: nctnico on September 27, 2019, 04:02:47 pmYep, the manual basically says that. But since they went out of their way to include that capability, it's odd they don't go into more detail about how they intend for it to be used.QuoteIt's really that simple, eh? Maybe I'll start with the same voltage as the source, and then slowly ramp it down to watch how the 66309D reacts.

author: 2N3055
author_rank: Super Contributor
timestamp: September 27, 2019, 06:37:34 pm
content: It is not really meant for this. This current sinking capability is only there for down programing the output. You also have no CC programming capability on sinking current, when sinking, current will vary depending on voltage on output. With a current limited source (like charger) you could use it as a load but only in CV mode, depending on charger for current limit.
PTS Frequency synthesizers - Page 1
Forum section: electronics / testgear

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: September 28, 2019, 05:35:07 am
content: I have heard about PTS frequency synthesizers for a long time and they are still being produced. They are known for high spectral purity and fast frequency switching. Finally, I got my hands on PTS-160 with nice features for a very reasonable price. It has 0.1 to 160 MHz frequency range, 0.1 Hz resolution, internal OCXO and GPIB control.Here are some quick shots, showing the frequency resolution (with the 10 MHz clock locked to the oscillator of the HP 53310 Modulation domain analyzer).The switching speed for a 1 MHz stepAnd control with GPIB using AR488 USB-GPIB macro to program 1 kHz steps.It should be able to switch frequency in 20-30 mu sec according to the manual. So 1 msec GPIB switching speed can probably be improved.Overall, a nice instrument to play with.
Tek TDS3012 and TDS3024 BW Upgrade/hack - Page 1
Forum section: electronics / testgear

author: grouchobyte
author_rank: Regular Contributor
timestamp: July 17, 2016, 03:56:40 pm
content: I have a couple of Tek lunchbox scopes (TDS 3k) that I have had for years and use them occasionally. Some time ago I ran into a friend of mine that used to work in that group at Tek and he mentioned there are a series of internal hardware jumpers that can be configured to enable higher bandwidth capability. Unfortunately he doesn't recall the details. This is apparently how it was done long before the present day "options" are software configured in firmware.Does anyone know anything about this? If so, please post or PM me with details.Thanks@grouchobyte

author: robert_
author_rank: Regular Contributor
timestamp: July 29, 2016, 06:53:41 pm
content: Wound be interesting to know if there is any solution...I didnt find anything obvious the last time i had to open a TDS3k though.

author: tonykara
author_rank: Contributor
timestamp: September 25, 2019, 03:04:38 am
content: anybody??

author: james_s
author_rank: Super Contributor
timestamp: September 25, 2019, 04:36:05 am
content: I'm not aware of any internal jumpers but the bandwidth can be upgraded via GPIB if you have the comm module.https://www.eevblog.com/forum/testgear/tds-1000-2000-3000-bw-hack/The hardware is identical across all TDS3000 models of a given channel count.

author: tonykara
author_rank: Contributor
timestamp: September 27, 2019, 10:37:08 pm
content: I found this thread yesterday.https://www.eevblog.com/forum/testgear/tds-1000-2000-3000-bw-hack/50/Got 1 scope updated, 2 more to do... Woohoo!
Software for digital waveform analysis - Page 1
Forum section: electronics / testgear

author: mac.6
author_rank: Regular Contributor
timestamp: September 27, 2019, 09:37:29 am
content: Hi All,I do some simple digital measurement with a Saleae logic analyser, mainly to extract cpu/time usage of deep embedded software via GPIO toggling.Pretty simple setup and I tough it would be piece of cake to extract thread cpu usage this way.But no, Saleae software have a nice and shiny UI but has nothing beside protocol decoding.Do you know some tools that can accept a VCD files and perform usefull analysis on it (average duty cycle, cummulative 0/1 time etc...).I know I can probably write a simple python script for it, but I hate reinventing the wheel...

author: Jeroen3
author_rank: Super Contributor
timestamp: September 27, 2019, 11:43:01 am
content: Uhm, the software bundled with the logic analyzer does have measurements.

author: MosherIV
author_rank: Super Contributor
timestamp: September 27, 2019, 07:21:13 pm
content: If I remember correctly, Saleae has export to csv.You can then import to excel or as you suggested with a pyton program to process the csv

author: thm_w
author_rank: Super Contributor
timestamp: September 27, 2019, 10:18:58 pm
content: Sigrok has a few timing features that Saleae software does not have, last time I checked, like pulse counting.Both definitely have average duty cycle measurements (PWM).So one of the two should cover what you want.
Keithley 2910 signal generator bricked - Page 1
Forum section: electronics / testgear

author: Xyphro
author_rank: Regular Contributor
timestamp: September 27, 2019, 07:16:47 pm
content: Hi Guys,Installed accidently an 2920 update on my 2910 unit and now the unit does not work anymore.Downgrading does not work.Urgently need a 2910 flash binary file to reprogram the on DSP flash, to fix the issue.Does anybody have a flash binary or would volunteer to readout his existing flash chip?
Agilent 1159A Differential Probe compatibility with DSOX3000A series - Page 1
Forum section: electronics / testgear

author: rodpp
author_rank: Frequent Contributor
timestamp: September 27, 2019, 01:54:28 pm
content: Hello,I need help regarding the compatibility of the 1159A probe with the DSOX3000A scopes.In the documenthttp://literature.cdn.keysight.com/litweb/pdf/5968-8153EN.pdf(page 4, footnote 3) says that the 1159A is not compatible with the InfiniiVision series.But I see no reason for that incompatibility, does anyone have tried that probe in one InfiniiVision scope?Or can explain why they are incompatible?Thanks,Rodrigo.

author: HighVoltage
author_rank: Super Contributor
timestamp: September 27, 2019, 03:24:22 pm
content: The 1159A is not recognized by the 3000A series scopes firmware and therefore will not work.I tried this on my MSOX3104ABut I have not tried this on the latest firmware, may be a scope FW update to the latest version changed this. Keysight is usually adding older and newer probes to new FW updates.

author: rodpp
author_rank: Frequent Contributor
timestamp: September 27, 2019, 03:37:56 pm
content: Thank you very much!

author: rodpp
author_rank: Frequent Contributor
timestamp: September 27, 2019, 05:30:53 pm
content: Quote from: HighVoltage on September 27, 2019, 03:24:22 pmIn the 3000 series program guide (page 280) the 1159A probe is mentioned as a possible return of a query:https://www.keysight.com/upload/cmc_upload/All/3000_series_prog_guide.pdfBut in the last firmware release notes, that agregrates all other releases, does not mention added support for the 1159A, although it mentions adding support for others probes.

author: TheSteve
author_rank: Unknown
timestamp: September 27, 2019, 05:46:36 pm
content: The 1159A certainly didn't work with a 3000x when I had one, and I don't think support will be added in newer firmware. If you're willing to modify the probe there is a way to make it work.You can find the details here:https://www.eevblog.com/forum/testgear/1159a-differential-probe-modupdate/msg1092252/#msg1092252

author: rodpp
author_rank: Frequent Contributor
timestamp: September 27, 2019, 06:09:36 pm
content: Thanks for the link, interesting...Certainly Keysight will not be adding support for probes to the DSOX3000A series anymore, maybe to the newer T series, but even that seems improbably.
Keithley 6485 OVRVOLT - Page 1
Forum section: electronics / testgear

author: Herbi
author_rank: Newbie
timestamp: August 21, 2019, 09:19:46 am
content: Hi,I never used a Forum before, as there are always more experienced persons giving advice and I don't only want to ask for help. Nevertheless, I thought i'll give it a try, as I really need help and maybe someone else can profit from this problem some time later.So here is my problem:I work at a University and we use a Keithley 6485 for measuring ioncurrents. Unfortunatelly, it started showing "OVRVOLT" on almost all ranges (not on the µA range, but this already showed rubbish before). Input to GND shows 0V. As I am not the only one using this device, I can't tell what happened to it, but worste case is 5kV from a charged up sample holder (no Idea what the capacity of that thing is, quite little probably).I tried exchanging the LMC662 and the LMC6081 more like as a quick and dirty approach, as this would not have been the first time this exchange was needed.I would be glad if you had some suggestions how to approach this problem, as i am not an electronics expert and i don't see where a good starting point would be.

author: HighVoltage
author_rank: Super Contributor
timestamp: August 21, 2019, 12:05:07 pm
content: Welcome to the forum.I have a Keithley 6485 but never opened it up, since it is working perfectly.The maximum allowed input voltage is 220V and 21 mA.If you have exceeded this, especially with 5kV, then follow the input path and check all components in this path.Its always a good idea, to limit the possible input voltage and current, just in case something breaks in the testing circuit.I have not looked.Is the service manual and schematics available for this instrument?

author: Herbi
author_rank: Newbie
timestamp: August 21, 2019, 02:11:16 pm
content: An additional input protection is a good point, i will write this on my Todo list so i don't need to worry that much in the future.The manual is available, but there are no schematics inside. The section covering the error massage of cause expects an external source of failure.A part of the schematics can be found in this posthttps://www.eevblog.com/forum/testgear/keithley-64856487-teardown/but the manual says: "Model 6485/6487 will change from a current limit to a 1MOhm - 3MOhm input impedance to prevent excess power dissipation" so i am not sure, in which state the meter is supposed to be.

author: Herbi
author_rank: Newbie
timestamp: September 27, 2019, 11:56:03 am
content: I could nod work in the meter for quite some time now, but i ordered some ICs in the meantime. However replacing U49 (LM393) alone fixed the problem.

author: HighVoltage
author_rank: Super Contributor
timestamp: September 27, 2019, 03:13:21 pm
content: Congratulations on what seems to be an easy repair.
EMI pre compliance - SVA1015X or Siglent SSA3021X Plus - Page 1
Forum section: electronics / testgear

author: jemangedeslolos
author_rank: Frequent Contributor
timestamp: September 25, 2019, 10:10:23 am
content: Hello,I need for a project a Spectrum analyser for EMI pre compliance tests.I was very interessted by the new SVA1015X but few month ago, the price was much lower.As Im not a RF guy, the SVA seduced me because all advanced measurement was in option.Now the VNA is included with a much higher price...and I don't care today about VNA.So I saw the (new?) SSA3021X plus....maybe it will suits more my requirement.I don't know on what project I will work on next year so I don't know if it is a better choice to go with a SSA or a SVA ?what would be your choice?

author: tautech
author_rank: Super Contributor
timestamp: September 25, 2019, 08:09:42 pm
content: I haven't seen a SSA3kX Plus yet so I wonder what free option trial times are now offered. They might be the same as existing SSA3kX 40 hrs but let's hope they are like SVA1kX that offer 120 hrs of trial time.....plenty enough to get a few projects done before needing to buy options.Most of the option functionality is available in the free EasySpectrum SW for SSA and SVA models for use after option trial times expire.They both now offer touch display, mouse control and Modulation analysis option is now included in the Plus SA models whereas previously only SVA models offered it.Edit to add:SVA and SSA+ both now also have a webserver whereas SSA didn't.Member hendorog and I recently remotely played with a SVA in the US using this feature.Basic prices w/o options areSVA1015X (TG + VNA) 1.5 GHz $1999SSA3021X Plus (TG) 2.1 GHz $1595SVA 1.5 GHz is adequate for EMI work and for $400 more a much more useful tool IMHO.My SSA3032X gets little use nowand will have to go when the SVA1032X arrives.SSA3021X is still available at the lower price of $1395 (c/w TG) for the time being.

author: jemangedeslolos
author_rank: Frequent Contributor
timestamp: September 27, 2019, 08:09:46 am
content: Thank you tautech for your opinion,I think you are right, if I need one of the advanced measures in the future, it will be nice to already have the hardwareI will go for the SVA

author: tautech
author_rank: Super Contributor
timestamp: September 27, 2019, 08:28:12 am
content: Quote from: jemangedeslolos on September 27, 2019, 08:09:46 amGood choice helped by SVA models come with the VNA option as standard now.Only a couple of weeks back I checked if all SVA options could be used in EasySpectrum SW and VNA wasn't supported.However with the recent news VNA comes as standard fare in SVA's it's no longer an option to loose.Now that leaves just the Modulation analysis capability missing in EasySpectrum so hopefully that capability will be added in some future EasySpectrum release.You'll love the SVA, it's by far my favourite tool.
HP/Agilent/Keysight 5-pin power supply output connectors... - Page 1
Forum section: electronics / testgear

author: IDEngineer
author_rank: Super Contributor
timestamp: September 19, 2019, 11:13:25 pm
content: Anyone know the original manufacturer and part number for the 5-pin connectors that HPAK uses on the back panels of power supplies? I've found the Phoenix 3705389 at DigiKey:https://www.digikey.com/products/en?keywords=3705389...but I can't find a dimensional drawing for it so I can't be sure it fits the HPAK header, pin size, etc.I'm looking to use these with an HPAK 66309D dual power supply.Thanks!EDIT: HPAK's original stock number for this part is 0360-2604, but a quick Google search doesn't reveal from whom they buy them.

author: pigrew
author_rank: Frequent Contributor
timestamp: September 20, 2019, 12:38:32 am
content: Phoenix Contact 1757048 (the part you linked to) will work. It's the 5.08mm pitch version.They sell a bunch of variations that you could use, like different entry angles, colors, or gold plating.... but the one you linked to is the most common.The DVM connector is 0.15" pitch (3.81mm). You can use 1803581 or 1850673, or whichever...

author: IDEngineer
author_rank: Super Contributor
timestamp: September 20, 2019, 01:03:41 am
content: Quote from: pigrew on September 20, 2019, 12:38:32 amAwesome, thanks! I've seen so many variations on this basic connector style that I wasn't sure. There are different pitches, different square pin dimensions, different (or absent) keying on the connector body, square-ish surrounds vs. circular surrounds....Again, thank you!

author: IDEngineer
author_rank: Super Contributor
timestamp: September 27, 2019, 02:03:50 am
content: Got the connectors in, from DigiKey.The good news is the five pin connectors fit just fine. This is Phoenix 1757048.The bad news is the FOUR pin versions do NOT fit the seemingly identical (except for pin count) connector for Inhibit/Fault. This is Phoenix 1757035.Theylooklike they should fit. The connector spacing and shroud shape around each pin looks correct. However, they act as if they are just a bit too wide. I'm going to Dremel off a bit of the width and see if I can make them work.I'll report back when I figure things out, in case it helps someone else in the future.
Got PM2534 and PM2121 but doc is spare, any SYSTEM21 gurus around? - Page 1
Forum section: electronics / testgear

author: babysitter
author_rank: Frequent Contributor
timestamp: August 08, 2019, 08:31:28 am
content: Hi eevblog hive mind,I am in the process of setting up some ATE at work. My boss this morning arrived with a philips DMM asking if I can use it for the next setup (I guess I will for the next setup.)When looking at it, i discovered a "SYSTEM 21" connector on its backside and had some memories that I once saw such a connector on the company scrap pile.After a trip to the cellar, I found a PM2121 low level switch that according to its name would actually be useful.The DMM manual shows how to forward commands to System 21 slaves and some low level commands and hints on cabling, but I was unable to find a PM2121 manual.Is there anybody who knows how to the sockets are connected and how to command it to act and is willing to answer the questions which might surface, for good karma and some "thanked you for this post"?Best regardsHendrik

author: coromonadalix
author_rank: Super Contributor
timestamp: August 08, 2019, 09:45:30 am
content: https://skye-electronics.com/product/philips-system-21-service-manual/

author: JXL
author_rank: Regular Contributor
timestamp: September 24, 2019, 12:31:41 am
content: @babysitter, in case you still need this info, there is a good system 21 manual at:https://www.manualslib.com/manual/1615480/Philips-System-21.htmlI don't have a PM2121 manual, but it functions as a 5-pair to 2-pair (or 10-pair to 1-pair) mux in its default mode (M2). The pinout is as in the following table:

author: babysitter
author_rank: Frequent Contributor
timestamp: September 26, 2019, 08:00:45 pm
content: Thank you, that is great
How to synchronize 2 R&S SMB100A two produce a differential signal - Page 1
Forum section: electronics / testgear

author: builder01
author_rank: Newbie
timestamp: September 25, 2019, 08:43:20 pm
content: Hi,I'm currently struggling with producing a differential signal from 2 SMB100A siggens.From siggen 1, I'm connecting having its REF OUT be connected to REF IN of siggen 2.Then, I tried connecting both PULSE EXT or INST TRIG. However, when I look at both signals on the oscilloscope, I see that they are not 180 deg. out of phase, in spite of me setting siggen 2 to have an external reference (instead of the internal oscillator) and set it to be at 180 out of phase from it.I'm a bit lost on what should I do. Would appreciate any tips. So far I'm only tuning them manually

author: jhenderson0107
author_rank: Regular Contributor
timestamp: September 26, 2019, 02:54:37 pm
content: In addition to wiring an external reference to the slaved generator, it is also necessary to specify the source of the reference input to the instrument. On my SML03, this is available via a menu item.

author: nctnico
author_rank: Super Contributor
timestamp: September 26, 2019, 04:17:58 pm
content: At which frequency? External trigger input/outputs usually aren't compensated for the time delay between them so you can't expect the outputs to be 100% synchronised. One way to overcome this is to have an external trigger source which feeds both external triggers (using a splitter and identical type / length cables). This should reduce the channel skew to a few ns tops.However the best option is to use a dual output generator which can phase lock both outputs.
Tek MDO4000 calibration procedure? - Page 1
Forum section: electronics / testgear

author: Howardlong
author_rank: Super Contributor
timestamp: September 30, 2019, 02:28:41 pm
content: Could anyone point me to the scope calibration procedure for these scopes please? Although it's script driven form the UI, there is a step close to the end (of course!!!) that I can't get to pass although as far as the brief onscreen narrative describes, I believe I'm giving it the right signals.If it makes any difference, it's an MDO4104C-SA6. The spectrum analyser section is fine, it's the scope calibration procedure I'm after,so it's possible a DPO/MSO4000(B) procedure would also help identify what I'm doing wrong.Edit: looks like the DPO/MSO4000(B) calibration procedure is in its service manual unlike the MDO4000.Edit: FWIW, it's step 76 that fails (of 78) which requires a 1Vpp 1kHz 50 ohm on all channels for deskew, the same as step 73, which succeeds.
Analog Discovery 2 Runs On Raspberry Pi 4 - Page 1
Forum section: electronics / testgear

author: rstofer
author_rank: Super Contributor
timestamp: September 26, 2019, 01:39:02 am
content: I just got an email about the ARM versions of Adept and Waveforms being available. Here is the link:https://blog.digilentinc.com/analog-discovery-2-is-now-compatible-with-raspberry-pi-4Download 3 .deb files and install with dpkg -i <package name> and you are good to go. It may be important to do the Waveforms file last. The Utilities .deb is not discussed on the web site but I installed it anyway.It works great!
WXD2 Desoldering compressor (Weller) - Page 1
Forum section: electronics / testgear

author: goupil35000
author_rank: Newbie
timestamp: June 07, 2019, 03:34:38 pm
content: Hi,I bought a WXD2 Weller desoldering station. But unfortunately, the needed compressor is not in the box.I have to choose one and want a quiet one.Characteristics of the compressor in WXD2 documentation (dry air) --https://www.weller-tools.com/professional/USA/us/Professional/Soldering+technology/Soldering+stations/Desoldering+stations/WXD2.Direct link to datasheet:https://media-weller.de/weller.php?action=send&modul_erp_article__lang=us&modul_erp_article__main_nr=WXD2- Air consumption l/min: 35- Operating pressure in bar/psi: 4,0-6,0 / 58-87- Vacuum: max. 55 kPa (8psi)- Max. vacuum: .7 bar;20.7 inHgCould someone advise some models, please?Thanks a lot.Goupil-----------------I found Revell 39138 model (https://www.conrad.fr/p/compresseur-aerographe-revell-39138-55-bar-32-lmin-231766?gclid=CjwKEAjwlujnBRDl2teOp_veulQSJAC5bHgtQ9cMZ2Zbrrt5rxl5Nu8DtTyhweuPRRxy1JjX7al7rxoCqEbw_wcB). Documentation (https://cdn.sos.sk/productdata/39/50/890737fd/airbrush-master-class.pdf). Characteristics:- Maximum pressure: 5.5 bar- Output in litres of air: approx. 32l/min- Air tank: approx. 2.5l- Noise level: approx. 50 dBCould you tell me if this model can match? Thanks.

author: Kjelt
author_rank: Super Contributor
timestamp: June 07, 2019, 05:49:51 pm
content: HI you have couole of options but the wxd2 does not need that much air.You can buy a 35l/min low noise for as little as €120 you have to find a company in your area.https://www.hbm-machines.com/producten/compressoren/low-noise-compressoren/hbm-4-liter-professionele-low-noise-airbrush-compressorBut if you find cheap not low noise you can place it somewhere else and use a long pressure hose to your solder table then connect a pressure tank (i buy 2nd hand diving scuba tank that is out of the guarantee since they are useless for the owners you can buy them for iron price) and use it as a local pressurebuffer.Then add a pressure regulator, for the wxd2 set it to 5 bar which ismore then enough.You actually on't need the 35l/mn because that would mean you keep the active button pressed, you only press it a few times per minute.

author: xxx2fan
author_rank: Contributor
timestamp: September 25, 2019, 11:57:47 pm
content: For 15 years now I use a compressor from an old water cooler that was scrapped out. It is quite and last forever, I have a gasoline fuel filter before the compressor to stop any solder etc. from the unit I change once in a while. It have been the best thing I have found. I also use a small cylinder for volume and a solenoid valve to go between the compressor and iron.They are lots of them around and usually can be had free, or for low dollars.Just a thought for youSaw years ago when a shop used this system for 6 techs at a work bench.It is very quite.
hp 8340a sweep generator attenuator issue - Page 1
Forum section: electronics / testgear

author: lkc21851
author_rank: Newbie
timestamp: September 25, 2019, 08:00:15 pm
content: i have an hp 8340a sweep gen and we had an issue with frequency over 18GHz being accurate. We swapped out A61 memory board and it fixed the frequency problem, but now out ulse mod and -90dBm attenuator option isnt working. i know it is something on the memory board but there arent any service documents that i can find that go through this board. looking to get lucky from someone with more experience repairing these units.
Gould 500 DSO Manuals/Schematics/Info? - Page 1
Forum section: electronics / testgear

author: PioB
author_rank: Regular Contributor
timestamp: July 01, 2013, 08:49:57 am
content: Hi,I got a 2-channel Gould 500 Digital Storage Oscilloscope 200 MHz, 200 MS/s as a present from a friend. Unfortunately, he got it without any documentation or info. I tried googling it, but other than a few old ebay auctions, a manual for the 400 series and the knowledge that a Ultima 500 4-channel DSO exists I found nothing. Does anyone have some digital copy of any information/manual/schematics of the Gould 500?Also, I am trying to understand the specs, if I understand correctly, the bandwith should be smaller than half the samples/sec (so < 100 MHz)?Thank you very much!

author: GrandDiego
author_rank: Newbie
timestamp: September 25, 2019, 09:27:50 am
content: Hello, I am also looking for this document for the 4-channel version.Have you found it since all this time?Thank you
New Hot Air Rework Station - NT-861DW / "Quick" (not Quick!) 761DW - Page 1
Forum section: electronics / testgear

author: dreamcat4
author_rank: Frequent Contributor
timestamp: September 24, 2019, 07:04:27 am
content: Finally somebody made a Quick clone, but with rotary controlsThis is brand new on the market, so no reviews as of yet. It would be nice to update / link to those here in the top post. Along with any other photos or relevant information about it.Some seller listings where you can find it:https://www.aliexpress.com/item/32962487112.htmlhttps://www.ebay.com/itm/223551448341https://www.ebay.co.uk/itm/303269538102Not sure about the quality, at all. Could be good. Could be bad

author: Deus
author_rank: Contributor
timestamp: September 24, 2019, 08:34:31 am
content: "Quick Clones" not really... only 700 watt vs Quick's 861DW 1000 watt.

author: thm_w
author_rank: Super Contributor
timestamp: September 24, 2019, 10:44:21 pm
content: Quality of the plastics looks horrific, but maybe thats just the odd color they've chosen.Not sure why you'd want this when the 1200W Best BST-863 can be had for the same price ($170):https://www.aliexpress.com/item/32958682640.html700W is barely above a typical 858D, which is good enough for the vast majority of work, but yeah not really on the level of a clone as Deus says.edit: here is one listing where its a bit cheaper ($140):https://www.aliexpress.com/item/32958869681.htmlbut thats still not enough to justify it.

author: dreamcat4
author_rank: Frequent Contributor
timestamp: September 25, 2019, 08:13:16 am
content: Quote from: thm_w on September 24, 2019, 10:44:21 pmBecause this thing has rotary dials for the user to control the temperature and air flow. Wheras the BST doesn't and has a touch screen instead. This is an aspect which is also missing from the Quick too.The thing is that you are correct that the BST station is a better quality product. Which is why several months ago I emailed a representative at BST company and specificall asked them to make those changes for their BST-863. To improve it into a future product. Ditto. Didn't hear back from them or anything. So for all we know, they might never end up doing that. So what is the way forward here?Personally I would very much like to see if there is any reasonable potential to mod the BST-863's user interface. So that we can install rotary encoders as dials and bypass that touch screen. However since many people buy this thing specifically for doing their most important and critical (or money earning) daily work. There is not much motivation to do that, if it means potentially taking the machine out of action, giving up work time, or risking breaking the machine. Which is kindda why doing such a mod is also a stupid idea.So what ends up happening? Some other company sees the opening in the market, and makes what the user is actually requesting. But it is probably a lower quality product.
FY3200S Easy fix to AC leakage current problem. - Page 1
Forum section: electronics / testgear

author: Insatman
author_rank: Frequent Contributor
timestamp: May 19, 2017, 01:58:59 am
content: I own the FeelTech FY3200S function generator. Recently I watched a YouTube video where a man in England modified his to stop leakage current from the AC mains to "ground", ie the BNC outer. He did this by replacing the existing switching supply with a linear setup. It was quite involved and he optically isolated the USB port as well. Sadly I don't have a link to this video.I wanted to isolate my unit for both safety and ground noise problems but decided to take the easy way out. See photo.The 220VAC isolation transformer is from Digikey and cost's about $17. There may be other cheaper transformers out there. I chose this one because it's low profile and I've used this series before with great results.Dave

author: HoracioDos
author_rank: Frequent Contributor
timestamp: May 19, 2017, 11:44:13 am
content: Quote from: Insatman on May 19, 2017, 01:58:59 amYou will find everything you need here.https://www.eevblog.com/forum/testgear/feeltech-fy3224s-24mhz-2-channel-dds-aw-function-signal-generator/I think that there's no need for another thread about this topic.

author: qq354813374
author_rank: Contributor
timestamp: June 23, 2017, 09:34:37 am
content: First of all, in the absence of the introduction of the ground wire of the two-wire plug of the switching power supply system will have such a situation.In order to suppress common mode interference, the switching power supply in the design, the "safety capacitor" will be between the "LG / NG" (safety capacitor is used for such occasions, even if the capacitor fails, will not lead to electric shock, so the secondary side of the switching power supply "ground" is equivalent to the midpoint of the AC voltage, so you measured 110V voltage. But this does not mean there will be security risks, after all, the capacitance capacity of only 1000pf.If you are still worried about its leakage, then the correct way is to measure its DC leakage resistance, the use of insulation tester is the most effective way

author: tankcreature
author_rank: Newbie
timestamp: September 24, 2019, 02:29:02 pm
content: How did you wire the transformer? I have one of these but I am not sure how to wire it for 110v.
DB25 to USB? LeCroy 9400A Remote output - Page 1
Forum section: electronics / testgear

author: Jon86
author_rank: Frequent Contributor
timestamp: September 24, 2019, 10:02:17 am
content: I just bagged myself a 9400A oscilloscope, which I've been enjoying a lot so far. Part of the reason I picked this model is the RS232-C output on the back, although now I have the unit in my hands I realise it's a DB-25 connector... I'd like to be able to hook this up to my PC to transfer the points and do automated testing, but I'm not sure how to go about converting the DB-25 output to USB.It seems like there are many other functional pins on this connector compared to the usual DB9, and whether they can be safely ignored or not, I have no idea.Hopefully there's an off-the-shelf solution to this, but I'm struggling to find it.Cheers

author: Kean
author_rank: Unknown
timestamp: September 24, 2019, 10:45:27 am
content: Unless it is running synchronous serial, the standard pins as provided on a USB to serial adapter with DE9 are likely to be sufficientGoogle "de9 to db25" for some references - e.g.http://cepd.com/calculators/serial.htmYou can connect all 9 signals, or you can start by just connecting TX, RX, GND, then add the hardware handshaking if needed.Sometimes you need to jumper any missing required signals to another that is active - but usually only on modems and some other specialist comms gear (DCE vs DTE).
Help identifying this logic analyzer(?) harness? - Page 1
Forum section: electronics / testgear

author: nsd_c
author_rank: Contributor
timestamp: September 24, 2019, 05:44:02 am
content: Hi all,I picked up a set of old-school Tektronix logic probe clips (P/N 206-0222-00) and a harness that was with them from an estate sale. I was able to figure out the part number of the Tektronix probe clips by looking in scans of old Tek catalogs on the Internet Archive.But, I can't seem to figure out what the harness is and what it goes to. It has 11 wires instead of 10 as used with theP64xxseries of logic probes. Also, the header connector is quite odd--it's curved and thicker to the rear, which I have never seen before.Does anyone recognize what this goes to?Thanks.
B&K Precision PR-40 scope probe any good? - Page 1
Forum section: electronics / testgear

author: GregDunn
author_rank: Frequent Contributor
timestamp: September 24, 2019, 06:39:56 am
content: I have a decent pair of Tek scope probes which I am using on both my old T922 and the new Siglent. But recently I unearthed a pair of BK Precision PR-40 which I must have bought sometime in the late 80s at a hamfest. I haven't been able to find much info on them, and consequently have no real knowledge of how good they are. They have a 1x / 10x switch but no contact to switch the scope mode, so that has to be done manually. Are they worth keeping? I mostly do audio, and seldom venture into the MHz region, so I suspect they'd be fine - but again, no specs.