hybridfree/eevblog-posts huggingface dataset:
HP 8920B and RFTools - Page 1
Forum section: electronics / testgear

author: Tony_G
author_rank: Super Contributor
timestamp: April 02, 2022, 04:43:18 pm
content: Hey All,This is just a quick post to write down what I needed to do to create a PCMCIA card with RFTools on it that can be used by an HP 8920B.Here is what I ended up doing (ignoring the faffing around that was also a key part of the experience):I used an old Thinkpad T20 that I've had since the late '90s (I think) - It has 2 PCMCIA slots on itUpgraded to Win98SE - I had just MS-DOS 5 installed on it as I was using it for some R&S software that needed an NI GPIB-323Previously I had purchased a flash memory card from eBay just for this - The card I bought was an IBM 2Mb Flash Card, part number 0934290 - I plugged it into the T20 and after the PCMCIA Card Services files were installed (with the requisite flashback to me filing a bug asking why this requires me to find my original CD again and it couldn't just be cached as part of the required files YMMV), the card was ready to go.Installed the MCE app from a site I was pointed to - As this was on a machine that I only use very occasionally I was Ok with downloading it on my PC, scanning it, and then putting it on a CD to install on the T20 - Yes I had some pucker factor going on about rouge software but the T20 doesn't connect to the net so I crossed my fingers and went ahead anyway - You can get ithere- I needed to use low memory launch - It's basically a command-line option that you pass to the app - The app installed placed two shortcuts on the desktop and when the Low Memory Value one worked I didn't bother to look into it further.I grabbed the binary file for the 11807E from the files section on the HP8924-Family-Spectrum-Analyzers group on Groups.io locatedhereDragging and dropping this onto the MCE let the T20 write the image to the cardShutting down and transferring the card to the 8920B enabled me to use it thereOn the 8920B, hit the TESTS button and select CARD as the program location, find RF TOOLS in the list of apps and execute it - Warning, it took the better part of 2 ice ages for it to launch on the 8920B but I might just be impatient - It ended up ranging without problems.Hopefully this helps anyone who is looking for RFTools in the future.TonyG
Solve the problem that the fan of MPT-7210A solar controller is too loud - Page 1
Forum section: electronics / testgear

author: Junce
author_rank: Contributor
timestamp: April 01, 2022, 09:17:27 am
content: Solve the problem that the fan of MPT-7210A solar controller is too loud1. The fan of the original MPT-7210A blows inwards, that is, under the design of the existing MPPT, the noise is about 76 decibels; the sound is relatively noisy, which is unbearable in a quiet room, if it is in a noisy outdoor environment. obviously heard;2. When the fan is changed to blow outward, the noise is about 66.4 decibels; the sound is relatively low, and the sound can be accepted in a quiet room, if it is in a noisy outdoor environment, the sound cannot be heard;3. It is also possible to directly add a booster column between the fan and the baffle. For example, I added a hexagonal nut between the fan and the metal baffle, so that the sound produced by the fan is also very small, and the sound of this size can also be received in a quiet room. ;Summary: You can use this form to optimize the sound produced by the fan and the shell. Of course, this is not the case for this product, such as other products with fans. If there is noise, you can try this method to solve it. Of course, if you have a better solution, I hope you can propose and communicate with each other.
Siglent EasywareX and Software questions - Page 1
Forum section: electronics / testgear

author: JimLev
author_rank: Contributor
timestamp: March 30, 2022, 07:31:31 pm
content: I haven’t downloaded anything yet.Looks like the SD1032x uses EasywaveX.The SPD3303x-e uses EasypowerThe SDM3055 uses EasyDMM.I thought EasywaveX would communicate with all 3 of them?

author: tautech
author_rank: Super Contributor
timestamp: March 30, 2022, 07:55:19 pm
content: They all share the connectivity drivers in the NIVISA Runtime package and that’s about all. Important it’s installed first.EasyWaveX uses mainly .BIN files for which you instruct the scope or other file source instrument to Save the correct file type for use in the SW.All these packages and more are here:https://int.siglent.com/download/softwares/All instruments also have programming guides to use within their respective SCPI command windows.Take some time to RTFM’s.

author: JimLev
author_rank: Contributor
timestamp: March 30, 2022, 09:44:36 pm
content: Of the 3 manuals I have there is only one page in the SDM3055 manual with info on using EasySDM.I’ll keep looking on line, maybe it’s in some of the manuals you linked to.ThanksUpdateNIVISA said it would run on Win7Prof 64bit, upon install is said Win10.I’ll look for an older version.

author: tautech
author_rank: Super Contributor
timestamp: March 30, 2022, 10:29:24 pm
content: Two manuals for each SDM model, the remote control and programming:https://int.siglent.com/download/documents/?CateIdss=5

author: JimLev
author_rank: Contributor
timestamp: March 30, 2022, 10:34:27 pm
content: Thanks, you always seen to have more info than I can get on the Siglentna.com site.

author: tautech
author_rank: Super Contributor
timestamp: March 30, 2022, 10:47:23 pm
content: Quote from: JimLev on March 30, 2022, 10:34:27 pmYou’re welcome Jim.TBH I use all 3 Siglent websites however I can generally find anything members need on the NA site however ATM I’m recovering from a medical procedure so only have an iPad to work from until hopefully home later today.In a day or so we’ll have some fun with some pilfered medical souvenirs and scopes probably in the TEA thread with a description of the journey I’ve been though in the last few days.

author: JimLev
author_rank: Contributor
timestamp: March 31, 2022, 02:55:26 am
content: Get well my friend.I was wrong about the OS. It was EasySDM that would run on Win7 and above.The version of NIVISA that I downloaded needs Win 10.

author: JimLev
author_rank: Contributor
timestamp: March 31, 2022, 05:48:57 pm
content: I found NIVISA V20.0 that will run on Win7, downloaded it and then EasySDM and it works.Thanks for the help.
Agilent U1152A? - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: April 01, 2022, 07:00:27 pm
content: I need to get VOM with remote link built in to work with iPhone. The Agilent ad indicates that the "remote link" is enabled on the U1152B but I can't find anything on the U1152A. If it's not enabled on the U1152A is it hackable and will it work with an iPhone without adding accessories? I have a Fluke 189II but I think it needs accessories.ThanksHank

author: HKJ
author_rank: Super Contributor
timestamp: April 01, 2022, 07:11:34 pm
content: I do not know about a Keysight U1152B, but generally Keysight needs a Keysight Bluetooth adapter to work with a phone. It also needs a Keysight program for the phone.There are some meters with build-in Bluetooth (That is the way they work with phones), you can find them from Fluke and from some other brands, usually they need a matching software on the phone. The quality and function of that software varies significantly between brands.

author: wd5jfr
author_rank: Regular Contributor
timestamp: April 02, 2022, 12:05:42 am
content: I've downloaded the Keysight Meter Logger App for the iPhone and I see that I need an U1177A IR to Bluetooth adapter about $50.00. But what bothers me is the Keysight data sheet on the U1252B indicates Keysight Remote Link Solution enabled but the U1252A doesn't indicate that but says it obsolete.https://www.keysight.com/us/en/product/U1252B/handheld-digital-multimeter-4-5-digit.htmlAgain, does anyone with U1252A experience know if it will work with the U1177A and the their iPhone App?ThanksHank

author: J-R
author_rank: Super Contributor
timestamp: April 02, 2022, 12:29:30 am
content: Seems like odds are good that they are the identical DMM just a different color:https://www.keysight.com/us/en/product/U1252A/handheld-digital-multimeter-45digit.html"The replacement models are the handheld in orange colour for greater visibility. The replacement model for U1252A is U1252B."

author: wd5jfr
author_rank: Regular Contributor
timestamp: April 02, 2022, 02:36:00 pm
content: What concerns me is this statement in the U1252B data sheet."Keysight Remote Link Solution enabled, which allows remote monitoring on a mobile device."https://www.keysight.com/us/en/product/U1252B/handheld-digital-multimeter-4-5-digit.htmlIt doesn't appear in the U1250A data sheet.

author: Wrenches of Death
author_rank: Regular Contributor
timestamp: April 04, 2022, 01:38:05 pm
content: Quote from: J-R on April 02, 2022, 12:29:30 amIf I rememer right, one of the differences was that the chargers in the Blue ones only supported 7.2 volt batteries. The Orange ones supported 7.2 and 8.4 volt batteries. I think that there were also other differences.I think that this might have been discussed a few years ago when the batch of NOS Blue ones popped up on Ebay.WoD
Kikusui 164D AC Voltmeter - schematic or service manual?... - Page 1
Forum section: electronics / testgear

author: Rax
author_rank: Super Contributor
timestamp: March 31, 2022, 12:38:35 am
content: Hi all,I recently got this at the local swap/hamfest, and am attempting to do calibration (it works OK upon a cursory check).But I can't get it to max the scale when seeing a 30mV voltage (per calibration procedure step 2). It does see full scale when seeing 10mV, 100mV in the respective scales. So, I'm not too worried yet and am still assessing this (little beaut of an instrument), but I was wondering if anyone is in possession of an actual service manual, or at least a schematic.The Operating Manual is available from Kikusui, and I've contacted them about the SM/schematic availability today.Thank you!Radu.

author: Rax
author_rank: Super Contributor
timestamp: March 31, 2022, 12:43:11 am
content: Well, no, I take that back. This thing measures (this far) absolutely dead on.I'd still be interested in schematic and SM, though.
Agilent ESA-E E4401-60066 "A5D" DC Power cable (For spectrum analyzer) - Page 1
Forum section: electronics / testgear

author: inaxeon
author_rank: Regular Contributor
timestamp: March 29, 2022, 08:40:13 am
content: Anyone got one of these?Would be good to see a shot of inside the mating receptacle. i.e. are the pins on the instrument male or female? I think they might be male.It's using a AMP Universal Mate-n-Lok connector but looks like it has non standard contacts which don't appear in the catalogue. Attachment shows against a standard variety for comparison. There's a couple for sale on eBay at the moment but none show inside that connector!

author: inaxeon
author_rank: Regular Contributor
timestamp: March 29, 2022, 09:18:18 am
content: Gender on instrument must be female as the diameter of the pin is the same as the opening in the receptacle, so if male there'd be no space for the mating contact.But there is still something weird here. The contacts on the instrument are about a millimeter longer than the standard 19A types, so if I load a Mate-n-Lock receptacle with male contacts it'll matebut not latchas the contacts on the instrument are colliding with the chamfer on the mating pin.Argh! Seriously!

author: inaxeon
author_rank: Regular Contributor
timestamp: March 29, 2022, 10:59:46 am
content: I think this might be these things - from the "Universal Mate-n-Lok II" catalogue (Attached)I'll put some on my next Digi-Key order...

author: inaxeon
author_rank: Regular Contributor
timestamp: March 31, 2022, 10:15:51 am
content: Okey dokey. My bits just arrived, and it's a definite confirm, that the instrument does not use the regular "auto store" variety of Universal Mate-n-Lok connector (top, pictured).Do not be tempted to use these.The pins are not long enough to reach to the spring cylinder inside the mating contact, result will be a meltdown given the amount of current this instrument is stated to draw.The correct contacts are a much larger machined type which crimp with a "Daniels" tool (also pictured). Would also be easy to solder. No chance of fitting these contacts into a regular housing either. They need a different two-piece type.Part numbers:Contacts: 193841-1Housing: 770017-1
Panasonic/Levear VP8194D software for Radio Data System - Page 1
Forum section: electronics / testgear

author: imaurente
author_rank: Contributor
timestamp: March 30, 2022, 11:34:06 pm
content: Hi everyone, I need some help. I bought a Levear (Panasonic) VP-8194D generator and I'm looking for the RDS (Radio Data System) editing software, I've looked everywhere on Google and haven't found any traces.
Need software PACE ThermoFlo 1700  - Page 1
Forum section: electronics / testgear

author: Vasya58
author_rank: Newbie
timestamp: April 01, 2022, 01:45:51 pm
content: Hi, i have an TF 1700E bga rework station, but the harddisk died and need to be replaced.Now we have a new windows xp installed but could not rescue the TF1700E software from the old disk.Does any one have this software please?
Have Keysight firmware upgrades given new function to older app bundles ? - Page 1
Forum section: electronics / testgear

author: EE-digger
author_rank: Frequent Contributor
timestamp: April 02, 2022, 04:41:01 pm
content: I'm looking at a loaded 3000T and the licenses appear to be the original app bundle from 2014. USB testing is completely missing, possibly more.Has anyone noticed if the latest firmware has upgraded any of their licenses?The reason I ask is because the latest firmware does actually group .lnk file options into the newly named bundles (if you've "improved" your scope). Don't know if the same happens for legit licenses (i.e. older names grouped into the new names).I know this topic may have come up before but I'm hoping that with the grouping under new license names, some missing functions may have been activated. Actually, this may be something that Daniel had alluded to in the past.Daniel - if you're listening, others and myself would be happy to pay a reasonable fee for bundle upgrades. For at least one person I know, it would REALLY need to be in the 10% range, not "50% off"

author: 2N3055
author_rank: Super Contributor
timestamp: April 02, 2022, 06:58:14 pm
content: Quote from: EE-digger on April 02, 2022, 04:41:01 pmDon't waste your energy. I asked for this several times here. Also sent an official question to Keysight.Answer is that if I want upgrade to new license I have to simply buy full new bundle. Because it is a new product and they don't support upgrade path...And no they don't care. Unless you're a big customer in which case there is no retail catalog but direct negotiation and anything goes...
Siglent SVA 1032X - Page 1
Forum section: electronics / testgear

author: W4OP
author_rank: Newbie
timestamp: March 29, 2022, 12:37:50 am
content: While I have a long history with network analyzers, I am rather new to my 1032. My question is about recalling save Calibrations. I have successfully (I think) saved calibrations (.CAL format), but cannot seem to recall them. I highlight the CAL file and press Open- but the screen does not change. So how does one recall a saved Calibration?Tnx,Dale

author: hendorog
author_rank: Super Contributor
timestamp: March 29, 2022, 12:47:06 am
content: Off the top of my head I think you may be hitting a known bug - where calibrations don't load unless there is already a calibration in place.You could test this theory by doing a 'dummy' OSL calibration (don't bother changing the standards on the port), and then try loading the cal. you saved.

author: W4OP
author_rank: Newbie
timestamp: March 29, 2022, 01:47:59 am
content: Thank you for the idea. Just tried it .I had a calibrated screen up (COR) and tried to load another CAL file. The only difference I could see was that the COR disappeared and was replaced by uncalibrated (C?). One would think this should be a very basic function. Heck, saved calibrations even work on the $100 nano-VNA, along with the ablity to plot a rectangular R+/-JX graph. Maybe I should have done more homework before purchasing the 1032X.Dale W4OP

author: hendorog
author_rank: Super Contributor
timestamp: March 29, 2022, 02:25:02 am
content: I have heard the COR indicator is also buggy.It should be pretty clear if you have managed to restore the saved calibration after you have attached one of the standards you used in the original calibration.Which version of firmware are you on? These issues have been around for a while and should have been fixed by now.

author: W4OP
author_rank: Newbie
timestamp: March 29, 2022, 02:28:05 pm
content: Yes, I did a 2 port cal and saved it. Then I set up a different set of frequencies and did a 1 port CAL. Next, I tried to recall the 1st CAL. Nothing on the screen changed except the COR went to C?It is also hard to understand the lack of a rectangular graph plotting R +/-JX versus frequency (also available on the nano-VNA).Tmx,Dale W4OP
Sencore FE160 opinions? - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 28, 2022, 09:44:21 pm
content: I need to upgrade my 1950s Eico 232 vtvm to perhaps a Sencore FE160 if I can find one in good shape and reasonable. Use is limited to tube type ham gear. I'm ready for pushbuttons instead of twisting knobs. Would like to know if anyone is or has used one and what they think. Here's a product release bulletin..https://worldradiohistory.com/Archive-Company-Publications/Sencore/Sencore-News-1971-06.pdfThanksHank

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 29, 2022, 02:45:32 am
content: Forgot to mention that on Lo power 0.08 volts it won't turn on transistors or diodes which is a plus for me.
Fluke 45 plastics broken is there a source for "new" parts?  - Page 1
Forum section: electronics / testgear

author: JasonB0020
author_rank: Newbie
timestamp: March 29, 2022, 02:29:14 am
content: Hey all. I bought a Fluke 45 from a seller on eBay that WAS in good condition, until he shipped it by UPS. Evidently he and UPS both made mistakes, his in the packing material chosen and UPS by dropping it from the warehouse roof and kicking it across the yard. Needless to say the front display assembly and rear plastic trim pieces are busted. Rear is worse than the front. I was able to snap the display back together, but it's mounting tabs are broken. The rear on the other hand is toast. Does anyone have any idea where I could possibly find those plastic pieces without having to buy another parts meter? Thanks.
I miss my UT203 (why you shouldn't buy a UT216C) - Page 1
Forum section: electronics / testgear

author: ball
author_rank: Contributor
timestamp: March 29, 2022, 01:48:48 am
content: My UNI-T 203 died due to humidity so I bought a UT210E. Seemed slower and it defaulted to AC, plus the clamp was too small for some wires I need to monitor. Why anyone would spend extra for DC just to use the AC function I don't know, but I did appreciate it using AAA batteries instead of 9V. So I then decided to buy a UT216C seeing as some people liked it and it seems even slower and has a completely unusable continuity mode where it takes a full second to beep. Who finds this useful?! So now I have to use two different DC clamp meters and both default to AC.All I want is a faster (in case UNI-T is listening, faster is the opposite of slower) and accurate UT203 that doesn't die when you breathe on it. Why can't they get this right?
Gould DSO 4071 Doumentation - Page 1
Forum section: electronics / testgear

author: rcrook
author_rank: Contributor
timestamp: March 28, 2022, 07:37:39 am
content: Hi,Picked up this Gould DSO 4071 for $AU60. Doesn't work of course but would like to try to get it working.What I am truly having trouble with is getting any sort of documentation on this model. I have the Operations manual for the 4072 which it the 4 channel version, (this is a two channel) but what I am after is a service manual for 4071.I hoping someone here might have some clues as to where I might find it.RegardsRandall Crook.
Replacement mA Fuse for BM235, BM786 and 121GW - Page 1
Forum section: electronics / testgear

author: paul_g_787
author_rank: Frequent Contributor
timestamp: March 27, 2022, 08:01:32 pm
content: Hi everyone! Thought I would post this as a new post.As so many people have wanted a replacement fuse for their EEVBlog meters I have ordered some stock in from SIBA and I have put them up for sale on eBay.If you need postage to outside the UK I will gladly arrange this for you.I can also sell you the fuse(s) direct if you do not use eBay. Send me a PM here. (eBay do not get a 10% cut this way).1pcs listing:https://www.ebay.co.uk/itm/12522661302510pcs listing:https://www.ebay.co.uk/itm/125226619741
Support Repair N9320B, Amplitude Level measuaring is incorrect - Page 1
Forum section: electronics / testgear

author: Thuyvv
author_rank: Newbie
timestamp: March 30, 2022, 03:16:05 am
content: Hi All,I have an errored unit N9320B, the Amplitude Level measuring is incorrect, the result measuring is larger than the RF level at the input ~ +6 ÷ +7 dB,The monitor display ERROR 102. 50 MHz calibration reference unleveled when I Align allPlease see the video in this link and help us fix this error,Thanks !
Marconi 2955B/2957B - Page 1
Forum section: electronics / testgear

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 26, 2022, 12:59:00 am
content: I have one of these test sets that I have had for years just not used.I sold several of these in the past to a local test equipment seller however they will only buy from a companynot an individual and our company is closed.Now I want to get this to someone who will use it, local only or trade for something I can use.Any ideas on what types of bussiness to look for?Jeff

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 26, 2022, 11:42:56 pm
content: Wally thanks for the help. That was the first group I went to and that went no-where (pun intended.)Again, local only and I am not very mobile so going to is not very likely.So, so far 1 responce Local hams or ham type radio repair shops, sounds like a good place to start.Jeff
Need help with E6601A test set. - Page 1
Forum section: electronics / testgear

author: JoeInAsia
author_rank: Newbie
timestamp: March 26, 2022, 02:51:49 am
content: Hello, I am new to this forum and came across it when searching for information on a HP8713C Network Analyzer.I purchased a E6601A test set back in 2014 and didn’t use it much. Pulled it out of the closet and powered it up and it was nice to see her again after so long. I booted up all ok (Windows XP) and Agilent software and I was trying to remember how to use it. I left it on all night only to see it was off in the morning and she won’t power up.It was quite a pain to open her up but I finally got to the power supply; a self contained module with propriety connectors. I have no idea how to trouble shoot this guy. There is no visible or smell to the power supply or anything else that I can see. I reseated all the modules. My next step would be to access the front panel and reseat things there in hopes it is something simple.Note when working and the power cable is applied, I get an amber light in the power on button and it turns green when pressed.Troubleshooting suggestions are most welcome.Thank you,Joe

author: JoeInAsia
author_rank: Newbie
timestamp: March 27, 2022, 04:18:17 am
content: I missed the fuse socket on the power supply hidden deep inside the first time; replaced the fuse and it popped again. Next; I though maybe I should apply power with he PS removed from the 6601A and take some voltage measurements with it on the bench. Bad idea, Snap, crackle, and pop's; then the fuse blew again. Now, I had additional damage to the power supply. Sad because I only paid about $600 for the whole unit and it may cost that much for a replacement power supply. Plus, if something else is bad, that caused the PS to go bad in the first place, I may be back to square 1 even with a replacement. I tend to just put situations like this back in the closet and may never deal with it again.Right now, I am in the market for a LAMBDA VA-26715 rev D; (Agilent PN: 0950-4457. This supply has 14 different D.C. outputs.
HP 54645A Issues - Page 1
Forum section: electronics / testgear

author: H713
author_rank: Regular Contributor
timestamp: March 27, 2022, 02:10:33 am
content: Greetings,I've had this HP 54645A in the "deal with it later" pile for a good two years now, and I figured I should ask the HP nerds before sending it to E-waste.At slower sweep speeds (>2 ms / div), I get the sort of artifacting seen in the attached photos. You can still see the approximate shape of the waveform, but with the strange glitches shown. Part of me is suspecting either the ADC or one of the ASICs (this is common to both channels), but I figure I should check the power supply rails before condemning it. Anyone else seen this behavior before? I've got better scopes around, so I'm not about to throw any appreciable money at this thing. I do have a soft spot for anything with a CRT, so I figure I should at least try.
Rigol DS1054Z save data as csv easily - Page 1
Forum section: electronics / testgear

author: T_guttata
author_rank: Regular Contributor
timestamp: March 26, 2022, 09:12:03 am
content: HiI have been using a Rigol 1054Z for about a year now. I'm happy with the device, but there is one "function" I'm missing.I often use the "print" button in order to save the current screen as an image on a usb stick. This is really handy as you only have to press one single button to perform the action. Now, it would be great to save a csv file the same way because the low resolution image only contains a fraction of the data available.Is there any solution around to save all raw data with a single click? Going into the menu takes forever and is not practical.Are there alternative scopes which do better in this regard?

author: Fungus
author_rank: Super Contributor
timestamp: March 26, 2022, 11:14:38 am
content: Do it via a network cable and avoid all the messing around with USB sticks.https://www.google.com/search?q=rigol+ds1054z+csv+via+ethernet

author: T_guttata
author_rank: Regular Contributor
timestamp: March 26, 2022, 11:50:17 am
content: Well, for me the USB stick is not bad at all because my computer is not in the same room as my scope ;-) But LAN would be fine too.Do you mean this piece of software:https://github.com/RoGeorge/DS1054Z_screen_capture?If I understand it right you just send a command to the scope via ethernet and you get the current screen either in CSV or bnp?

author: Fungus
author_rank: Super Contributor
timestamp: March 26, 2022, 12:16:42 pm
content: Quote from: T_guttata on March 26, 2022, 11:50:17 amThere's a lot of different software/scripts for it, they're constantly changing so I didn't recommend any one in particular.You can grab the screen, you can grab the entire memory... whatever you want. It uses SCPI (ASCII text commands) so a language like Python makes it easy to make little script files for various jobs.Here's the manual:https://www.batronix.com/files/Rigol/Oszilloskope/_DS&MSO1000Z/MSO_DS1000Z_ProgrammingGuide_EN.pdf

author: T_guttata
author_rank: Regular Contributor
timestamp: March 26, 2022, 09:17:03 pm
content: How can you send the commands? Do you need this "Ultra Sigma"?

author: Fungus
author_rank: Super Contributor
timestamp: March 26, 2022, 11:54:06 pm
content: Quote from: T_guttata on March 26, 2022, 09:17:03 pmNo! Avoid Ultra Sigma like the plague. It's the most awful, bloated thing imaginable.Just make a network connection on port 5555 (eg. with telnet if you want to play around manually) and send them.
Hantek 2d72 upgradable to 2d82? - Page 1
Forum section: electronics / testgear

author: Geza
author_rank: Newbie
timestamp: March 30, 2022, 12:49:31 pm
content: Hello,Need some help with my 2d72. It is working (correctly) with 2d82 firmware I loaded, but not sure if automotive tests are working - I have the menu on the scope, but not in software companion. I saw that for 6000 series is a specific menu item for automotive tests....Anybody - any ideas for hacking this device?Thanks, G.
Broken frame on HP-410B VTVM - Page 1
Forum section: electronics / testgear

author: sorenkir
author_rank: Regular Contributor
timestamp: March 22, 2022, 04:59:10 pm
content: Hello,I have this VTVM with a broken front frame (the missing part has been lost).It is made of some sort of metal alloy.Does anyone have an idea of how to fix this ?Thanks,Michel.

author: SeanB
author_rank: Super Contributor
timestamp: March 22, 2022, 05:09:31 pm
content: Clean up another corner, and apply wax to it, and use it to make a mould of that corner. Then use that mould, placed on the broken section, and use 2 part metal loaded epoxy to make a filler piece. Then after the epoxy is cured sand down till it matches, and spray paint with silver paint the whole bezel, so that it looks like a single part, the paint covering the damaged section.

author: sorenkir
author_rank: Regular Contributor
timestamp: March 22, 2022, 05:59:54 pm
content: I cannot make a mould from any other corner as top and bottom corners are not identically shaped.But I keep the idea of metal loaded epoxy.Michel.

author: trackersoft
author_rank: Contributor
timestamp: March 22, 2022, 08:12:35 pm
content: Go tohttp://www.kiss-electronics.com/index.htmand ask her if she has a frame. She does great work on the b and c models and is a source for parts.Scott KE1RR

author: The Doktor
author_rank: Regular Contributor
timestamp: March 25, 2022, 11:58:00 am
content: Any luck yet? I've got a 410B with a burned out main transformer. I'd be willing to send the piece you need for the cost of shipping, which may not be cheap as I'm in USA.Let me know if you still need it and I will check that it hasn't been damaged in it's years of storage, we'll figure best shipping option if it's OK.Ed

author: sorenkir
author_rank: Regular Contributor
timestamp: March 25, 2022, 02:05:50 pm
content: Hi,Thanks to all!I think I may have two solutions on my side:1) make a swap2) make a mould from the good frame, to make a filler piece (never done that before)I will probably try to go with 2) as I want to keep my 200CD intact.Michel.
Uni-T UT204A clamp meter 600 A range zero adjustment? - Page 1
Forum section: electronics / testgear

author: pOM
author_rank: Contributor
timestamp: March 19, 2022, 07:09:26 pm
content: Is there a way to adjust the 600 Amp DC range indication to be at or near zero when there's no wire or nearby field present? Mine reads 23 ("0023") Amps!The 40 Amp range has some residual, but it's down around 10 or 20 ma., and not a concern for my use.I know I can, and I do, use the "relative" function to zero the meter; however, if I could get the 600 A range residual to be zero, or even just a few Amps, it would be small enough that I wouldn't have to use the relative function every time.https://www.eevblog.com/forum/testgear/uni-t-ut204-clamp-meter-review-and-tear-down/msg173557/#msg173557has a link to the schematic (Reply #23) and a list of the variable resistors (Reply #2), but as far as I can tell none of the latter are for zeroing the residual indication on the 600 A range.The "23" is rock-solid and repeats every time the meter is turned on. It also adds to the actual current in the positive direction, and subtracts from the current in the negative direction. I wonder if it's being caused by an errant fixed component rather than a variable control that needs resetting.I've opened the case but haven't yet done any close inspection/testing along these lines.

author: Fungus
author_rank: Super Contributor
timestamp: March 20, 2022, 12:56:43 pm
content: It might need degaussing.

author: pOM
author_rank: Contributor
timestamp: March 21, 2022, 08:14:04 pm
content: Thanks.I had thought of something like that, but then wouldn't it affect the lower current range (40 Amps), at least as much, and perhaps even more?Not sure how I could degauss it, in any event. Ideas?

author: Fungus
author_rank: Super Contributor
timestamp: March 23, 2022, 04:11:22 pm
content: Quote from: pOM on March 21, 2022, 08:14:04 pmProbably.Quote from: pOM on March 21, 2022, 08:14:04 pmWave a magnet near it. See if the offset goes up or down. If it goes up then turn the magnet around. Repeat.

author: pOM
author_rank: Contributor
timestamp: March 24, 2022, 03:31:32 pm
content: Moving a magnet near the sensing end, and especially within the clamp area, does cause the reading to change, but that's normal. It's simulating the magnetic field around a wire that's carrying current.Earlier I linked another thread that had a schematic and range-calibrating controls; however that was wrong. It's for the UT204, not the UT204A that I have.I foundhttps://www.eevblog.com/forum/reviews/uni-t-ut204a-clamp-meter-review-not-the-one-with-the-truerms/msg169667/#msg169667,which is, indeed, about the 204A. There, others comment about the somewhat high residual offset. The response is that it's normal.I guess that's probably it.
HP428B probes - Page 1
Forum section: electronics / testgear

author: jeffjmr
author_rank: Regular Contributor
timestamp: March 22, 2022, 02:09:52 pm
content: The meters are plentiful but the probes are few.Is there an aftermarket or suitable substitute readily available, or a DIY plan that a non-engineer might be able to fabricate?Thanks,Jeff

author: bob91343
author_rank: Super Contributor
timestamp: March 22, 2022, 10:44:23 pm
content: I once got a broken 412A from these people. As for a 428, I believe the probe is the same for the A and B versions.http://www.kiss-electronics.com/index.htm

author: factory
author_rank: Super Contributor
timestamp: March 23, 2022, 07:55:45 pm
content: They are still made for the 428D from Applied Physics, but probably cheaper to look for an old 428A/B probe on ebay.https://www.appliedphysics.com/products/magnetometers/David
Help identifying oscillator on keyboard logic board - Page 1
Forum section: electronics / testgear

author: newtekuser
author_rank: Frequent Contributor
timestamp: March 22, 2022, 11:28:09 pm
content: This is yet again another component from an old xt keyboard belonging to a compaq portable I.A Google search for KSS4B shows it to be an oscillator running at 14.3MHz but pictures are different from mine (see below)I did probe all 4 pins with my scope and it measures 4.6MHz on all so now I'm not sure if the part is not the same one or I have a bad oscillator (the keyboard throws a 301 error)I also probed pin 6 on the keyboard connector and saw no clock signal... nothing at all.Can anyone familiar with this part please confirm if this is indeed a 14.3MHz one?

author: Venturi962
author_rank: Regular Contributor
timestamp: March 23, 2022, 01:02:27 am
content: Here's a similar keyboard with 'KSS3M' marking so 'KSS4B' may not be helpful to understand what the part is:https://forum.vcfed.org/index.php?threads/compaq-portable-i-corroded-keyboard.57223/This also shows that the chip next to it is a INS8035-6 (datasheet attached) which looks to max out at 6MHz, 4.6MHz would seem alright.

author: newtekuser
author_rank: Frequent Contributor
timestamp: March 23, 2022, 05:11:42 am
content: Quote from: Venturi962 on March 23, 2022, 01:02:27 amIs there any correlation between the 4.6MHz and the 6MHz IC next to it? That does have two XTAL pins but I thought it's running off its own internal oscillator.
Rigol DS1104Z Plus and DS1104Z Plus-S differences - Page 1
Forum section: electronics / testgear

author: oceanborn
author_rank: Newbie
timestamp: March 28, 2022, 09:12:22 am
content: Hi everyone. I am new on the forum.Some questions for owners of the Rigol DS1104Z. I have ordered a DS1104Z-Plus-S. But the one I received is labeled "DS1104Z-Plus" (without the S i.e. source channels / function generator option):1. System utility : displays "DS1104Z Plus" . Should not it display "DS1104Z S Plus" ?2. It is written on the front panel (right to the blue rigol logo)Should not it read "DS1104 Z PlusSon that front panel ?3. I do not see "Function generator" in the list of installed optionsHowever, the scope I receiveddoeshave the function generator (2 sources BNC in the back) and it seems to work. I tested with BNC cables from the source1&2 to the inputs.I am pondering whether to return the unit but I feel this is going to be a waste of time as it seems I have all the functions. Are there any other diffferences between those 2 models I should know about ? I looked at the datasheet and rigol shop and I do not see much else.I filed a case with Amazon & rigol but I would like an opinion from the forum as well.regards,Good day.

author: RoGeorge
author_rank: Super Contributor
timestamp: March 28, 2022, 09:23:46 am
content: You have the "Plus S" version, nothing to complain or to return. There is no such thing like a "Plus" without S but with a signal generator included. The "S" stands for "Signal Generator".At most, you can report a firmware bug, because the "S" letter is missing from the screen when the model is displayed.
GW Instek GDS-1104B disappointment - Page 1
Forum section: electronics / testgear

author: JAubrey
author_rank: Contributor
timestamp: March 22, 2022, 04:09:38 am
content: One of the features I was looking forward to with this scope was the advertised serial decoder. However it is not in the apps on the scope or mentioned in the manual.Furthermore Instek has not answered my emails or chats.Jack

author: modoran
author_rank: Regular Contributor
timestamp: March 22, 2022, 06:11:28 am
content: Firmware is V1.27 or higher ?

author: JAubrey
author_rank: Contributor
timestamp: March 22, 2022, 02:46:48 pm
content: Thanks for asking. It is V1.29.Maybe they call it something else but all I found was so demo board stuff which requires an external part.

author: nctnico
author_rank: Super Contributor
timestamp: March 22, 2022, 02:59:13 pm
content: Press the pink 'BUS' button on the front panel.Don't know about the manual but an easy route is to get the manual for the GDS-2074E

author: JAubrey
author_rank: Contributor
timestamp: March 22, 2022, 03:33:09 pm
content: Doh!I went to the site and downloaded manuals again and , "there it is". I actually searched the other manual for UART, I2C, etc. It is on my old computer will take a look next time I fire it up.Of course I did not look under bus, being the Homer that I am, thought it would be an app.Thanks big time.Bus is blue now, math is pink, and ref is yellow.Perfect because I have two unknowns, a new TM4C MCU and an untested I2C device. Actually the scope helped already by letting me se there was no SCL leaving the MCU board. So now I have goes-outtas and can now analyze goes-into's.Now if I could make the tiny screen fonts larger.jh
Pacific Power UPC12 program controller test automation  - Page 1
Forum section: electronics / testgear

author: munkeyman1985
author_rank: Contributor
timestamp: March 17, 2022, 02:49:51 pm
content: I have this an AMX-108 with the UPC12 controller. It has the D25 pin RS232 interface. I started by downloading the labVIEW VIs from the NI webpage. They are for GPIB so I had to modify them with line feeds for the most part. After that I have add some odd problems that I have not come across before.Any read from LabVIEW caused errors of some sort. Mostly and RS-232 framing error, and read time out. Even commands like *OPC? or *IDN? cause a problem when I use VISA Write. When I run the commands from a console with the same port settings they seem to work most of the time. I hope someone has seen this before and has some insights.lastly I'm trying to save programs to it over RS-232 with several segments. I don't get any errors but nothing happens. Even the example code slightly modified because this unit only has 2phases. I have tried in labVIEW and directly from a console. I get the same result. This power supply has been around for a while, some one must of had luck programing over RS-232. I would appreciate any help.

author: SuperMario
author_rank: Contributor
timestamp: March 22, 2022, 01:19:58 am
content: Hi,If you still need help with this problem, could you post your code screenshot?Thanks
Who makes Multicomp Pro instruments sold by Farnell? - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: March 20, 2022, 02:24:05 pm
content: Farnell, Newark is selling a line of instruments called Multicomp Pro. I wonder who made them. Some of the instruments look like Uni-T but I am not sure.

author: nctnico
author_rank: Super Contributor
timestamp: March 20, 2022, 02:28:57 pm
content: AFAIK it is a wild variety. Personally I avoid anything sold under the Multicomp brand; it usually is rather cheap (crappy) stuff sold with a high markup.

author: threephase
author_rank: Regular Contributor
timestamp: March 20, 2022, 02:45:07 pm
content: Similar to the RS Pro Brand, appears to be a number of different rebranded items, predominantly Chinese. Certainly some of them are made by CEM.

author: tooki
author_rank: Super Contributor
timestamp: March 20, 2022, 06:44:42 pm
content: Same with RND, Distrelec’s house brand. Some of it is great, and looks for all the world to be made by top manufacturers, while some looks like the cheapest crap marked up to brand-name prices. :/

author: tunk
author_rank: Super Contributor
timestamp: March 20, 2022, 08:30:38 pm
content: I think some of the scopes are made by Owon.
Filter signal on oscilloscope using math functions - Page 1
Forum section: electronics / testgear

author: chris_eb
author_rank: Newbie
timestamp: March 27, 2022, 05:01:54 pm
content: Can I use these functions available in the math menu to simulate a low pass filter on a Siglent SDS2000X Plus oscilloscope?Basically I'm asking what is the time domain transfer function of a first order low pass filter

author: mawyatt
author_rank: Super Contributor
timestamp: March 27, 2022, 05:27:14 pm
content: The time response of a LPF will depend on the input signal. A normalized voltage type 1st order differential equation describing a 1st order LFP is:Vo + K * dVo/dt -Vi = 0, where Vo is the output voltage, Vi is the input voltage, and K is the filter constant (usually RC or R/L).Best,
digital multimeters diode check voltages [LEDs] - Page 1
Forum section: electronics / testgear

author: impetus_maximus
author_rank: Contributor
timestamp: March 19, 2022, 04:38:55 am
content: i was looking at Brymen multimeters to replace my aging & out of alignment TekPower DT9602R when i noticed something.Quote from: mos6502 on October 03, 2016, 06:45:19 pmthis had me leaning toward the 235 as i'll be working with LEDs frequently. as a 'bench' power supply i thought of a BM869s. seeing joe smith's video "Updates to the Brymen BM869s Backlight Timer" i noticed during a function test the white LED lit, but didn't show the forward voltage. looking at the brochure the BM869s has a 2v diode check. another $650 meter wouldn't even light the white LED.TLDR;as a noobie, my question is this. are testing LED's forward voltage not that important to most since it's not supported on high end multimeters? do folks just use a dedicated LED tester or some other method?cheers

author: retiredfeline
author_rank: Frequent Contributor
timestamp: March 19, 2022, 04:43:36 am
content: It wouldn't be an important factor to me. If I really wanted to do a thorough LED check, I could whip up a test harness. For go-nogo, I use a coin cell.

author: bdunham7
author_rank: Super Contributor
timestamp: March 19, 2022, 05:06:53 am
content: The 257s is available as the DM-510A from Greenlee, a US distributor that offers a green shroud and a lifetime warranty. TEquipment sells them and with the EEVBlog discount it's under $150.LED testing is just another feature, but IMO not a huge one. 3V isn't really enough either for blue LEDs or zeners, and if you are regularly testing LEDs or zeners you should have a power supply and a test rig to measure current and voltage.Either meter will be fine for basic use.

author: impetus_maximus
author_rank: Contributor
timestamp: March 19, 2022, 05:28:41 am
content: thank you both. i was putting too much importance on this.@bdunham7 i love your sig

author: Fungus
author_rank: Super Contributor
timestamp: March 19, 2022, 11:15:31 am
content: Quote from: impetus_maximus on March 19, 2022, 04:38:55 am2V wouldn't light a white LED. The meter actually puts out 3.5V but can only show up to 2V on the display.(nb. this sort of thing is quite common - higher test voltage than the meter can display)Quote from: impetus_maximus on March 19, 2022, 04:38:55 amA lot of people, joe smith included, don't think it's important. Many manufacturers don't even list the diode test voltage.Me? I quite like it as a feature. It's something I look for in a meter.Quote from: retiredfeline on March 19, 2022, 04:43:36 amHow does that work on a star LED?(Yeah, I know... you could put it in a holder with two wires but that's a faff if your multimeter can do it)

author: impetus_maximus
author_rank: Contributor
timestamp: March 19, 2022, 10:24:56 pm
content: Quote from: Fungus on March 19, 2022, 11:15:31 amyou think this is a hardware or software limitation?Quote from: Fungus on March 19, 2022, 11:15:31 amappreciate that.Quote from: Fungus on March 19, 2022, 11:15:31 ama good point for flashoholics. then again they would probably have some sort of rig for that.cheers
Anyone have a BNC Connector for a HP5460XB Series scope. - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: March 20, 2022, 05:53:05 pm
content: I have a HP54602B where one of the BNC connectors has been damaged beyond repair. Does anyone have one of these for the B series froma scrap PCB assembly? The A version uses different BNC connectors that are part of a cast assembly so they sadly will not work. The B serieshas a guide pin on the rear of the connector and it is secured with a T8 metric thread screw.Thanks,SamW3OHM
Amprobe RS-1007 PRO analog meter Teardown  - Page 1
Forum section: electronics / testgear

author: rjardina
author_rank: Contributor
timestamp: March 19, 2022, 11:15:43 am
content: Do realize this is an electronics forum and this meter is more for electricians / "mains".But love teardowns here on the forum. This is the only analog meter (that I can find) that is CAT IV 600 rated and still being produce.Only two differences between RS-1007 PRO and RS-3 PRO (guessing) clamp size and scaling on current.In my 30s and never really used an analog meter. Have watched Dave's video on Analog Vs. Digital meters, and can't disagree with anything he says but find them fascinating non the less.One of the very few pros of analog meters is no battery required on amps and voltage. Therefore it hangs above my work beach, connected and taunts me if I trip the breaker.