hybridfree/eevblog-posts huggingface dataset:
R&S UPV anyone with Win 7 OS? - Page 1
Forum section: electronics / testgear

author: Sighound36
author_rank: Frequent Contributor
timestamp: December 20, 2020, 10:06:05 pm
content: Hello chapsApologies for the long gap between posts we have just been really busy during this difficult period for everyoneRealise this maybe a long shot does anyone use a Rhode & Schwarz UPV or UPV66 at all particularly if you use Win 7 operating system.If so would like to hear from you would like to know which pc hardware and firmware you are runningJust acquired one of these device and would like to dig deeper into this great piece of test equipmentThanksSH

author: Sighound36
author_rank: Frequent Contributor
timestamp: December 23, 2020, 03:42:17 pm
content: Nobody has a Win 7 version?

author: tv84
author_rank: Super Contributor
timestamp: December 23, 2020, 03:44:21 pm
content: Quote from: Sighound36 on December 23, 2020, 03:42:17 pmI think nobody has a UPV...

author: coromonadalix
author_rank: Super Contributor
timestamp: December 24, 2020, 01:10:26 am
content: https://www.rohde-schwarz.com/ca/product/upv-options_63490-7558.html?
Korad kel 103 electronic load - timer in battery mode - Page 1
Forum section: electronics / testgear

author: masterx81
author_rank: Frequent Contributor
timestamp: June 01, 2020, 04:15:39 pm
content: Hi! I have a kel103 as electronic load. I'm using it (also) as battery discharger, but i've noticed that the timer (down/sx display) is not in seconds. The setting of "timeout" in the manual is in seconds (and must be referred to that display). So, it's only my unit that count too fast, or it's a general issue?

author: ArturP
author_rank: Newbie
timestamp: December 26, 2020, 08:33:37 pm
content: Hi,I am not sure if you still need an answer to this, but the display shows the time in minutes (decimal representation). The setting is indeed in seconds, but display in minutes, go figure

author: masterx81
author_rank: Frequent Contributor
timestamp: December 26, 2020, 09:29:25 pm
content: Yeah, after a while i've figured it out. But why decimal??
Hitachi V-1100 oscilloscope manuals - Page 1
Forum section: electronics / testgear

author: yo0
author_rank: Regular Contributor
timestamp: December 22, 2020, 08:47:08 pm
content: hello, somebody can help me? i can´t find manuals for Hitachi v-1100 (non A) model, any help will be really appreciated.best regards.Pio
Interesting Alternative to a LISN - Page 1
Forum section: electronics / testgear

author: charliedelta
author_rank: Regular Contributor
timestamp: December 21, 2020, 08:37:18 am
content: I came across this device while surfing for a new LISN.Looks like a good product in concept. Dont know the price and know nothing about it.https://www.onfilter.com/emi-adapter-msn15There is a EDN by Wyatt which gives it the thumbs upConsidering what LISN's sell for it might be a perfect EMC diagnostic tool.Anyone use one?

author: nctnico
author_rank: Super Contributor
timestamp: December 21, 2020, 02:09:24 pm
content: It is a nice tool to monitor AC content on power lines but it is not alternative for a LISN. The purpose of a LISN is that it provides a well defined (simulated) line impedance so you can make absolute measurements.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 21, 2020, 11:13:05 pm
content: So... it's >10nF, a resistor and a >300uH transformer? Handy I suppose, if you're doing that sort of thing.The isolation is interesting, I suppose one might save the isolation transformer in building a LISN, but still need isolation, for which a nice wideband transformer would do. This can be patched on pretty much any time.Tim

author: charliedelta
author_rank: Regular Contributor
timestamp: December 22, 2020, 07:50:03 pm
content: Nobody is suggesting that this device will take the place of CISPR LISN.It would make a handy pre-compliance tool for design work. I suppose it would not take much to do a baseline comparison to see how much error it has in terms of level measurements when comparing it to a true CISPR standard LISNQuote from: nctnico on December 21, 2020, 02:09:24 pm

author: charliedelta
author_rank: Regular Contributor
timestamp: December 22, 2020, 07:58:13 pm
content: The circuit is published somewhere on the net.It uses a Schaffner or other EMC line filter 2 coupling capacitors grounded through resistors and then a 20db attenuator for the receiver. Its simple enough to make and nothing special or CISPR certified! I suppose if you lazy you can just use a current probe!I suppose a LISN is not something that you leave laying around on your workbench when doing devlopment or pre-compliance work! A tool that can quickly do spot measurements without killing yourself or tripping the RCD breakers would be handy.
GOULD DSO 475 - Page 1
Forum section: electronics / testgear

author: Hugo_De_Almeida
author_rank: Newbie
timestamp: April 25, 2019, 06:43:38 pm
content: Hi allI have a GOULD DSO 475 but it is not working:The scope starts/boots up but only displays "VERSION 6.18" on the CRTThe front panel does not seem to react to any inputs on the buttonsThe LEDs on the front panel light up but do not change either (for example when I change channel 1 from CD to AC or to GND mode)None of the menu or function buttons seem to be workingI have no trace, no lines, nothing. only "VERSION 6.18" shows on the CRTI have searched the internet for weeks now but the only service manual I can find is for the GOULD DSO 400, not for the model I have (GOULD DSO 475)I would like to repair it myself because I like doing debugging and repairing stuff but never had to repair such a complicated device with no service manual and no hints on what is missing.All the supply voltanges seem to be ok (only the +15V seem to be a little low (14.6V), in the 400 service manual it should be 15.0V +/- 0.2V)All the fuses I could find are ok, none is blown.Any ideas where I could start trouble shooting the scopeDoes any of you have the same model? or even better the service manual for the GOULD DSO 475??I hope some of you could help me on this manner.Thanks in advance for the help.regardsHugo

author: TAMHAN
author_rank: Frequent Contributor
timestamp: April 25, 2019, 10:59:19 pm
content: Hello,I have the manual for the DSO450.Tam

author: Hugo_De_Almeida
author_rank: Newbie
timestamp: April 26, 2019, 04:49:02 am
content: Hi TAMHANThats good, at least it is closer to the 475 model than the 400 model.Is it in PDF form?Is there a possibility to send it trough e-mail?That would help a lot.Hugo

author: TAMHAN
author_rank: Frequent Contributor
timestamp: April 28, 2019, 12:25:08 pm
content: Hello,I already DMd you my email address.I have a bit of a problem giving the manual as it is, technically, owned by Telford Electronics who want to sell it...Tam

author: Frank_Ges
author_rank: Newbie
timestamp: October 06, 2020, 11:10:21 am
content: Hi Hugoi own the same DSO and got the same error last week. Did you solve yours ? how ?perhaps the NiCd-Battery ?many thanks for your answerFrank

author: oleeiner
author_rank: Newbie
timestamp: December 22, 2020, 07:05:17 pm
content: Hello,i've got an Gould 450 with some strange error in channel two. The gain of channel 2 is always to high, an the square wave edges are overshooting.Can you send me the manual for the 475? The Manual of the Gould 400 doesn`t fit to my instrument.regardsErik
Calibration of only VDC on Fluke 287/289? - Page 1
Forum section: electronics / testgear

author: aronake
author_rank: Frequent Contributor
timestamp: December 21, 2020, 01:46:28 pm
content: Hi,My fluke 289 is around 8 digits of at 5 V DC compared to my newly calibrated Fluke 8845a.I would want to calibrate that away, but reading the 289 calibration manual, its seems all (VAC, ohm, current, etc) or no calibration steps need to be done.Do anybody know if there is some workaround to this, to only calibrate the V DC?

author: Grandchuck
author_rank: Super Contributor
timestamp: December 21, 2020, 04:22:40 pm
content: I have never calibrated this meter but from the manual it seemsperhapsyou can select the range of interest and then calibrate it:1. Move the rotary switch to the function that you are calibrating as indicated by the calibration procedure.2. Apply the source value indicated by the secondary display.3. Wait for the measurement on the primary display to settle to its final value. There is no internal control or wait time. It is up to the user to determine that the measurement is settled.4. Press the NEXT softkey to calculate calibration constants for the current step. During calculation of calibration constants the secondary display will show Calibrating.... Some calibration measurements take longer to execute than others (up to 115 seconds). If the measurement is within calibration tolerance the Meter records the new constant(s) and proceeds to the next calibration step, giving a single beep to prompt the user to proceed.

author: bdunham7
author_rank: Super Contributor
timestamp: December 21, 2020, 05:27:47 pm
content: I think this note in the cal manual shoots your idea down:If the measurement is not within calibration tolerance then after pressingNEXT an error message will be shown and the calibration step will notproceed. The operator can adjust input signal if needed and attempt NEXTagain.So it appears that stepping through the calibration steps and deliberately having an invalid input at each step to prevent writing a new cal constant won't work--it will simply not advance.If you did, you would need an exact 5.0000 volt source, since there is no option to customize the calibration input as there is with some meters. So you can't use the 8845A as a reference for a source that is close to, but not exactly, 5 volts. Also, the specified uncertainty for this meter at 5.0000 volts is 14 counts, so you are well within spec. Unless you have very precise temperature control, you may not be improving the calibration of the meter at all even if you were to find some way to do this.

author: aronake
author_rank: Frequent Contributor
timestamp: December 23, 2020, 01:06:22 pm
content: Quote from: bdunham7 on December 21, 2020, 05:27:47 pmHi!Thanks for comment. Yes, it seems to be a somewhat odd arrangement of calibrating all or nothing.And yes, I am aware it is well within spec, so just one of these because you can (well actually cannot in this case...) things. No particular need. I have a very stable adjustable DC source, so plan was to use the 8845a to adjust that to exact voltage, then use that for calibration.
Aneng AN9002 App Problems - Page 1
Forum section: electronics / testgear

author: justanothername
author_rank: Regular Contributor
timestamp: December 19, 2020, 03:31:41 pm
content: Hi All.I got myself an Aneng AN9002 BT Multimeter. Just for fun and as a backup. I can't get the app working.Anyone has an idea what to do? Aside that, I do not understand why a multimeter app needs access to my location..Any hints how to reverse engineer are appreciated as well.M.

author: HKJ
author_rank: Super Contributor
timestamp: December 19, 2020, 05:35:56 pm
content: Quote from: justanothername on December 19, 2020, 03:31:41 pmThat has something to do with the way BT works on the phone, some "smart" guy at google decided that scanning for BT devices requires access to you location (Probably so google can use BT id as a way to find you location).

author: rernexy
author_rank: Contributor
timestamp: December 20, 2020, 08:52:59 am
content: What phone model? What version of Android/iOS?My 9002 is working with an iPhone7 running iOS14.2, and with a Nokia 6.1 running Android 10.

author: justanothername
author_rank: Regular Contributor
timestamp: December 21, 2020, 01:50:21 pm
content: I got a xperia XZ1 compact with Android 9.It says "Add device" and "Scanning" and thats all.I did allow location access and file access but did deny access to audio recording. Why should it record audio files from microphone?

author: rernexy
author_rank: Contributor
timestamp: December 21, 2020, 03:40:04 pm
content: Quote from: justanothername on December 21, 2020, 01:50:21 pmDid you turn on Bluetooth on the meter by holding down the button labelled "Hz %" for more than 2 seconds?

author: justanothername
author_rank: Regular Contributor
timestamp: December 21, 2020, 08:07:59 pm
content: Sure I did.I can see the multimeter as Bluetooth device. I tried to pair manually but no success.

author: rernexy
author_rank: Contributor
timestamp: December 22, 2020, 02:11:04 am
content: Quote from: justanothername on December 21, 2020, 08:07:59 pmIf you can see it there then we know the meter bluetooth module is working, or at least not inoperative.But the meter uses bluetooth LE for the interface, so attempting to pair via the Android bluetooth system menus serves no purpose apart from troubleshooting its existence.Where did you download the app from? I downloaded it by scanning the qr-code on the back of the meter and following the web link it produced.The Android app version I downloaded is 1.0.13

author: Tjuurko
author_rank: Regular Contributor
timestamp: December 22, 2020, 05:43:31 am
content: Quote from: justanothername on December 21, 2020, 08:07:59 pmThere is a great app to check if the BT/BLE is working:https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminalAfter starting the application, select: Menu -> Devices -> Bluetooth LE -> Scan
Fluke 189 Calibration - Page 1
Forum section: electronics / testgear

author: ci11
author_rank: Regular Contributor
timestamp: December 22, 2020, 02:07:26 am
content: A little OT - has anyone experienced Fluke 189's not staying calibrated after 2 weeks? It is about 1% on DCV - i.e., 12.000 DCV read 12.000 after cal but 12.148 after about 2 weeks.

author: bdunham7
author_rank: Super Contributor
timestamp: December 22, 2020, 02:39:35 am
content: Quote from: ci11 on December 22, 2020, 02:07:26 amIs it off by similar amounts on all ranges? How about resistance and ACV? Was it calibrated due to a similar issue?

author: ci11
author_rank: Regular Contributor
timestamp: December 22, 2020, 02:51:05 am
content: Quote from: bdunham7 on December 22, 2020, 02:39:35 amI followed the cal manual and did DCmV first as suggested. Since I I cannot seem to get the DCmV or DCV to stick, I did not do ACV or R. I did call Fluke Service in WA. They do cal the 189 still but do not fix i tany more. If the cal turned into a service, then I still pay for the cal and get a dud back. There is a "Repair through Replace" option but it's not really economical.I am sincerely hoping that this is not the end of the 189 as it's a nice meter to use.

author: bdunham7
author_rank: Super Contributor
timestamp: December 22, 2020, 03:03:45 am
content: Quote from: ci11 on December 22, 2020, 02:51:05 amI assume it is not it cal mode anymore. When you use it to measure DCV on different ranges, ACV and R, is it off by similar amounts? If you haven't tried, give it a try with some basic measurements compared to another meter.

author: ci11
author_rank: Regular Contributor
timestamp: December 22, 2020, 03:25:44 am
content: Quote from: bdunham7 on December 22, 2020, 03:03:45 amI will give your suggestions a go tomorrow.Unfortunately, the 189WASthe most likely to be accurate DMM I have. I sold my DM5120 some time back because it just was too big to get used. Now I use a 79 II daily which has never been cal'd since I bought it at Fry's 30 years ago. Many others came and went but the 189 is the most reached-for.Thanks for your suggestions.
Uni–T UT61e louder continuity buzzer? - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: December 22, 2020, 06:26:49 pm
content: Hi!Just a quickie one!Can anyone recommend an alternative type of continuity buzzer that will go in the UT61E that's either louder or more audible please?The one I have in mine is too faint and high–pitch to hear when I'm tracing circuit boards out!Chris Williams
LeCroy 9450 inside - Page 1
Forum section: electronics / testgear

author: ulyanoff
author_rank: Contributor
timestamp: December 19, 2020, 09:50:01 pm
content: Hello anybody ! I bought this scope on ebay and I have concerns that one module is missing inside. while dealing with the manual. Someone can send a photo from the top side (under the cover). Since there is one free slot on the motherboard.

author: smaultre
author_rank: Regular Contributor
timestamp: December 20, 2020, 02:32:47 pm
content: https://www.radiomuseum.co.uk/9450.htmlhttps://www.eevblog.com/forum/repair/lecroy-9450-with-bad-1m-inputs-need-help/https://www.eluke.nl/2014/01/26/lecroy-9450-oscilloscope-repair/...

author: ulyanoff
author_rank: Contributor
timestamp: December 21, 2020, 03:36:38 pm
content: Thanks, this info I looked through several times.
Looking for Oscilloquartz OSA 5230 user manual - Page 1
Forum section: electronics / testgear

author: looney
author_rank: Newbie
timestamp: December 21, 2020, 02:15:41 pm
content: Hi!I'm looking for the user manual for my Oscilloquartz OSA 5230 GPS receiver with the rubidium oscillator option.Specifically the manual for version "945.523.040".I was only able to find the 945.523.06x version, but sadly this one has a lot of information and serial commands that don't match with my 040 unit.I have been trying to get the manual from Oscilloquartz / ADVA for over a year now but they don't want to hand it out as I'm not a direct customer nor do I have a service contract.I'm hoping someone here happens to have it or maybe someone has better standings with Oscilloquartz / ADVA.PS: new to the forum after being a long time lurker, not sure if this is the correct part of the forum for this, so feel free to correct me on this!
Metrix MX 579 Multimeter Error (no manual) - Page 1
Forum section: electronics / testgear

author: David H
author_rank: Newbie
timestamp: December 21, 2020, 06:27:04 pm
content: Hi,I've recently got hands on a Metrix MX 579 bench-multimeter. However, I didn't get my Hands on a unser manual nor am I able to find one on (In German or English) on the Internet.When powering the instrument up, all display segments show some character, not a digit, neither a letter, propably some error charcter. It doesn't matter, which mode or range I select.I have no clue where to start troubleshooting, can anyone help me?Thanks in advance,David

author: bob91343
author_rank: Super Contributor
timestamp: December 21, 2020, 10:54:09 pm
content: A mystery. Without some technical info you would probably just poke around looking for poor connections, whether soldered or on connectors. If there is a range or function switch perhaps it's dirty or corroded.Have you tried to contact the manufacturer?Here is a manual in French.https://www.thierry-lequeu.fr/data/METRIX-MX579-ENSET.pdf

author: 2N3055
author_rank: Super Contributor
timestamp: December 21, 2020, 11:04:43 pm
content: What is your knowledge level?It might be many things. You should very carefully disassemble it (using gloves touching PCB if it is clean).If it is obviously dirty, it might need cleaning. It could be board damage or corrosion. It could be LCD elastomer contacts between glass and PCB, or holder is broken so it doesn't have enough contact pressure.You should contact Austria Metrix office first and explain your problem and nicely ask if they could provide you with some documentation.After that, you will either have some docs and good starting point, or you will have none and nothing to loose but to proceed without it..Start with that an report back here how it went..

author: bdunham7
author_rank: Super Contributor
timestamp: December 21, 2020, 11:32:47 pm
content: Take the cover off and post a photo of the board. If Metrix can't provide a schematic or info, perhaps you may discover that the unit is actually rebadged from something else. It looks vaguely familiar, but not the same as the usual suspects that I checked.

author: lowimpedance
author_rank: Super Contributor
timestamp: December 22, 2020, 01:10:09 am
content: Quote from: David H on December 21, 2020, 06:27:04 pmAttached is the schematic, parts list and cal procedure. Merry Christmas.

author: bdunham7
author_rank: Super Contributor
timestamp: December 22, 2020, 01:40:34 am
content: http://www.tsf-radio.org/newarch/tome-99/schmes-metrix-MX579.pdf

author: bdunham7
author_rank: Super Contributor
timestamp: December 22, 2020, 03:52:39 pm
content: The heart of the unit is IC Z7 (or Z107 in the parts list) which is an ICL7135 'all-in-one' 4.5 digit meter chip. Z12 and Z13 are just 74LS display logic. Your problem is most likely either Z7 or Z13, as Z12 just selects the digit, while Z13 is the BCD-to-7 segment converter. The schematic lacks the individual chip details, so you'll have to get datasheets for the ICL7135 and 74LS47, then check the lines between Z7 and Z13 to see what you get.
Keysight DSOX1102G FRA for 8.83MHz SSB Filter - Page 1
Forum section: electronics / testgear

author: bb1
author_rank: Regular Contributor
timestamp: December 20, 2020, 07:08:20 pm
content: When DSOX1102G was initially released it had very underwhelming FRA. Later firmware version 01.20 significantly improved the FRA.It is interesting to see how good the FRA is using practical example of the SSB filter for the standard IF of 8.83 MHz.
Mastech 2115B - Page 1
Forum section: electronics / testgear

author: MarkMLl
author_rank: Frequent Contributor
timestamp: February 01, 2020, 12:24:44 pm
content: I bought myself one of these a few days ago, since it was the only affordable meter I could find that had both a current clamp and USB (etc.) output.Quality is acceptable, I've not checked the calibration and I'd not trust it for anything other than LV (no isolation slots on the PCB etc.). There's a "review" video on YouTube which appears to show around 5x captures per sec., but what I'm seeing is a fairly stable 2x per sec unless the reading implies long integration which obviously slows things down more.If it's of any use to anybody I've borrowed a description of the message format from the Sigrok sources and knocked together a little program using Free Pascalhttps://www.freepascal.org/which captures readings on Linux. Graphical output RSN...MarkMLl

author: Hernexto
author_rank: Newbie
timestamp: December 18, 2020, 01:16:13 pm
content: (I know your post is old, but could help others)I have the 2115B for few years, many units (including mine) do not work well: buttons interchanged, functions don't work, it hangs, clamp functions broken without using it...

author: MarkMLl
author_rank: Frequent Contributor
timestamp: December 20, 2020, 05:23:19 pm
content: Mine appears OK as a knockabout meter, subject to the usual caveats about unknown calibration accuracy etc.I've not found any button etc. problems, if I've got a gripe it's probably the slow (and variable) update of data on the USB i/f.MarkMLl
Multi function tester TC1/T7 - Page 1
Forum section: electronics / testgear

author: vk3ohm
author_rank: Newbie
timestamp: December 20, 2020, 06:15:55 am
content: I have a multi function tester type T7. Appears to be the same as type TC1.1. After not using it for 6 months, I have powered it up and it consistently reads 50-60 ohms between terminals 2 and 3. Nothing is connected. It has been calibrated. Any ideas what could be wrong?2. These are an intriguing and very useful device. Is there a document somewhere that explains the theory of operation?

author: bob91343
author_rank: Super Contributor
timestamp: December 20, 2020, 06:51:06 am
content: Take it apart and look for damage. I have two of these. The first one is old and I drilled three tiny holes to run wires in to solder to the pads so I could have test leads. If there is a solder bridge there it could cause a problem.The battery in that one also isn't secure and developed shorts and later, broken leads.You need a tiny Phillips screwdriver to take out four screws and the case comes apart.

author: vk3ohm
author_rank: Newbie
timestamp: December 20, 2020, 07:56:19 am
content: Yep - done all that, but thanks for the advice.

author: indman
author_rank: Super Contributor
timestamp: December 20, 2020, 08:09:39 am
content: vk3ohm,the forum already has a separate topic for repairing clones like yourshttps://www.eevblog.com/forum/testgear/tc1-lcr-meter-transistor-tester-fix/And also a global topic for different clones herehttps://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/
KeySight Infiniivision 2000X 3000X 4000X scopes NAND corruption repair summary - Page 1
Forum section: electronics / testgear

author: wp_wp
author_rank: Regular Contributor
timestamp: December 20, 2020, 04:43:05 am
content: KeySight Infiniivision 2000X 3000X 4000X scopes NAND corruption repair summaryAfter a period of study and research,I have helped my friends repair their KeySight Infiniivision 2000X 3000X 4000X scopes with NAND corruption problems successfully.Now I write some summaries，welcome to add and correct.Up to now,I have encountered two cases of infiniivision series scopes NAND corruption：1.power on with no displayIn this suitation,when you power on the scope,its screen has no display,just some LED indicator splash.From the UART interface of the board，you can stop U-boot with pressing space key,go into P500 prompt,then you can upload WinCE kernel file,start the Infiniivisionapplication from USB drive.2.display a picture,and then crashIn this situation,when you power on scope,you can see the scope displaying a picture,but then it stop at the picture,it can not go into Infiniivision UI.From the UART interface,if you press space key,you can not see P500 prompt.You will see something like this:l)Load memory resident image Load image 1 now1)Load memory resident image 1 now2)Load memory resident image 2 now3)Load memory resident image 3 nowd) Download from platform builder nowu) Start u-boot by resettingv) Verify ImagesI uploaded the WinCE kernel file through LAN interface,start the Infiniivision application from USB drive.I know some friends repair NAND corruption scopes with changing flash chip,and they will change model number and serial number of scope also.
UNI-T 216C,BRYMEN BM037,AND KLEIN CL800??? - Page 1
Forum section: electronics / testgear

author: Neeko
author_rank: Contributor
timestamp: December 19, 2020, 05:30:23 pm
content: So I think I narrowed down 3 clamp meters... the uni-t 216c, the brymen BM037, and the Klein cl800. If anyone has experience with any of these or even just a opinion I'd be extremely grateful! I'm looking to learn and I need/want a decent clamp meter. Hoping to be fairly accurate from the clamp for AC AND DC current down to 250 milliamps/.25 amps, safe,and reliable! THANK YOU TO ANYONE WHO CAN HELP ME! this is only my 2nd post so hope I'm following any guidelines and posting correctly.

author: threephase
author_rank: Regular Contributor
timestamp: December 19, 2020, 09:45:19 pm
content: I do have a UT216C, it seems ok build quality, has some good functionality built into it for a general purpose clamp meter. I haven't tested it for accuracy, but if you don't hear from anyone else on here, I can tun it up on an injection test set and see what I get.

author: threephase
author_rank: Regular Contributor
timestamp: December 20, 2020, 09:22:12 pm
content: Some measurements for you on the UT216C. Current is from an injection test set with 0.15% accuracy.

author: Neeko
author_rank: Contributor
timestamp: December 21, 2020, 12:11:14 am
content: Wow.... that's a lot better then I thought it would be from a uni-t.... I REALLY APPRECIATE YOUR HELP AND TIME
MSO1074Z telnet access... - Page 1
Forum section: electronics / testgear

author: KK1L
author_rank: Contributor
timestamp: December 19, 2020, 04:55:55 pm
content: Folks,I have my MSO1074Z on my LAN. I am able to access it with UltraSigma, Bildshirmkopie, rigolif. I can ping it as well (obviously). Try as I might PuTTY just stares blankly back at me trying port 5555, 23, or 22 using either SSH or telnet. I MUST be missing something.P.S. 1st post for me. I have been scouring this forum this month before and after purchasing the scope. Lots of great information and FAR too many folks to thank for what I have found, but I will say THANK YOU nonetheless73 es God Bless,KK1L Ron <><
MSO1000Z series software licensing - Page 1
Forum section: electronics / testgear

author: DMKitsch
author_rank: Newbie
timestamp: May 21, 2020, 12:28:59 am
content: Hi,I've been debating whether to buy a MSO1000Z series scope which seems to be the same as the DS1000 Plus series with a common firmware? I was wondering if I can enable a higher bandwidth on these scopes, like you can on the non plus models from 50MHz up to 100MHz.From what I understand I can enable all software options once I have dumped the internal keys, but it seems like it may not be a software option to increase the bandwidth available? I've been looking at link 1 as a basis for doing this hack. I guess the main question is whether it does exist as a key that may not be showing in the GUI or whether anyone has released a custom firmware that can enable the higher bandwidth options on the scope? I guess it's not really a deal breaker either way, just looking into my options availableI appreciate all the help that's given,Davelink 1:https://www.eevblog.com/forum/testgear/sniffing-the-rigol_s-internal-i2c-bus/msg569236/#msg569236

author: jiarui
author_rank: Contributor
timestamp: May 21, 2020, 02:15:57 pm
content: I bought a MSO1074Z when Arrow had a ridiculous sale (I bought it about $350, with logic probes). I was able to enable all options. It is reporting that it is an MSO1104Z. So, I assume that it is a 100Mhz model now.

author: DMKitsch
author_rank: Newbie
timestamp: May 21, 2020, 05:36:47 pm
content: Beauty, thanks so much for the info. I must say I'm a little envious of your deal, I've just paid double that in the UK

author: KK1L
author_rank: Contributor
timestamp: December 19, 2020, 04:44:55 pm
content: Was your change to 100MHz official, JTAG memory dump, or were you able to load the firmware which allows the memory dump over LAN? I am stuck not being able to load a down-level firmware, and none of the SCPI interface programs yield any joy on that front either (bildschirmkopie, UltraSigma, etc).73 es God Bless,KK1L, Ron <><
https://www.eevblog.com/forum/buysellwanted/marconi-2945a-power-supply-module-44 - Page 1
Forum section: electronics / testgear

author: GusCX
author_rank: Newbie
timestamp: December 29, 2020, 07:21:44 pm
content: Dear forum users:I am repairing a Marconi 2945A. Equipment was working up to the Self-test screen until trouble happened at Power Supply module 44991/179.I am used to component-level troubleshooting and Power Supply repairs; however, I have no detailed schematic diagram, just what comes in the Manual: External connections and block diagram.I have the equipment Service Manual but neither the diagram nor the components are listed.Module is defective and I am looking for:A. Schematic diagram.B. A complete working replacement module. (Refurbished is acceptable)C. A qualified service center where I could send the module for repair.Any help is appreciated. Thanks and regards
Amprobe AMP-320 AC/DC Clamp Meter - Page 1
Forum section: electronics / testgear

author: dylanmitchell
author_rank: Contributor
timestamp: December 18, 2020, 12:33:33 am
content: Got an Amprobe AMP-320 AC/DC Clamp Meter and made a DIY line splitter to test the amp tip. Liking it so far. Wanted a good quality meter to measure AC/ DC current, in rush, low current under 60 A, and True RMS. 320 has Peak RMS for measuring in rush or start up current (AC only), low current 0-60 A tip, does AC and DC current, and can measures HZ through clamps. Temperature reading are 5-10 degrees off, and my Fluke 117 has more accurate voltage readings. 320 is overkill for working on residential electrical but I wanted AC DC clamp meter with in rush and low current.It is step down from a Fluke 325, 376, or 902 but is a lot more affordable. You have to spend a lot to get a Flukes all the feature you need. Fluke and Amprobe are the same company but build for different markets. 320 is lighter, thinner, and taller than my 323. Interesting because Amprobe invented the clamp meter but Fluke has figured out how to build a better on. Be interested to see how size compares to Fluke 325.Originally ordered the Amprobe AMP-25 Mini-Clamp but ship date kept getting pushed back. Amprobe only has in rush on 25, 320, and some of their more expensive models. Amp-25 may sweet spot in line up it has. It is smaller, has in rush but may not have fit an AC line splitter. Also looked at Hioki CM4370, Fluke 376, 902, 325, and i410 but they were at least a hundred dollars more and I don’t know if 325 and i410 can measure in rush.Used 12-gauge rubber appliance cord with 5-15P to bare leads, exposed a bit of wire and connected to 15.0 A 5-15R connector. Overkill and a little heavy but very solid.https://photos.app.goo.gl/foHhFvqemX2Z4wzq8
Feeltech Fy6900 DDS Function Generator - Page 1
Forum section: electronics / testgear

author: mark256
author_rank: Newbie
timestamp: November 19, 2020, 07:06:24 pm
content: Hello All,I am new to the forum and this is my first post.I have just recieved my FY6900 DDS Function Generator and I want to add some custom signals to it, I intend touse it for ECU repairs and want to inject the cam and crank sensor signals into the ecu. I have a hantek 1008c usb oscilloscope which can save a trace as a CVS file.If i try to import the CVS file on the FY6900 software v6.5 by doing file open channel 1 CVS a second windows open where I can select the file and open. My problem is nothing seem to happen. Is thier a maximum file size that can be imported this way.Thank You

author: ledtester
author_rank: Super Contributor
timestamp: November 20, 2020, 12:28:18 am
content: The arbitrary waveforms are limited to 8192 points on the FY6900.Just two days ago this python library got support for the FY6900:https://github.com/mattwach/fygenThere's are examples of uploading an arbitrary waveform in the examples directory.

author: mark256
author_rank: Newbie
timestamp: November 20, 2020, 01:05:55 am
content: Thank You for the reply but this link seems to be for Linux I am using Windows 10. I have created a CVS file for a hall sensor from Picoscope 7 but when copied into the FY6900 software it come in as a saw tooth wave. Does anyone have a CVS file they have created I could look at as I must be doing something wrong.Thank You

author: ledtester
author_rank: Super Contributor
timestamp: November 20, 2020, 11:22:45 pm
content: Well, the Introduction page claims:QuoteHere is a recipe for installing Python and pyserial on Windows:https://stackoverflow.com/a/27596979You can also use the Ubuntu recipe described on the github page by activating WSL -- the Windows Subsystem for Linux:https://ubuntu.com/wsl

author: henque
author_rank: Newbie
timestamp: December 18, 2020, 10:02:52 pm
content: Hi,for some time, I have been working on a GUI application in Java for the cheap MHS-5200 function generator, and now when I got myself a FY6900-100 unit, I am adding support for it as well. The basic stuff is starting to work. Someday it might even be useful :-)I just discovered an annoying deviation in my unit and wonder if it is just my unit or a common thing.For CH1 the first selectable wave forms are:Sine, Square, Rectangle, Trapezoid, CMOS, Adj-Pulse, DC ...but for CH2 they are:Sine, Square, Rectangle, Trapezoid, CMOS, DC ...Notice the absence of Adj-Pulse on CH2.No big thing, but I want to have a nice combobox where you pick the waveform you want, but as they seem to differ between CH1 and CH2 I might need to handle CH1 and CH2 differently. Before doing anything, it would be nice to know if it is just my unit having this issue.
2304A - Programming issue - Page 1
Forum section: electronics / testgear

author: jmonette
author_rank: Contributor
timestamp: December 17, 2020, 11:53:52 pm
content: Hello,I'm trying to automate my 2304A to make automated power measurements. I wrote a small software that connect via GPIB to it and send it instructions. It was working pretty well until I try to read the values from the power supply. I want to read the voltage readout and for some reason, it needs a delay of about 700ms between the write and the read, otherwise the power supply gets in error -420,"Query UNTERMINATED". It only happens when I try to read the readout (both voltage and current). I doubt it is related to the sample rate (NPLC) or average since they are both as fast as possible.I tried sending both : :MEASure:VOLTage? or :FETCh? and the result is the same.Interestingly enough, when I try to measure both the voltage and the current, it needs even more delay, about 900ms. That makes 1.8 seconds per measurement!Do you have ever encountered this issue or any clue what could causes this?Thanks
Agilent ARB 33521B (33500B Series) -- Screen Saver ? - Page 1
Forum section: electronics / testgear

author: JohnPi
author_rank: Regular Contributor
timestamp: December 17, 2020, 05:34:53 am
content: On my 33521B, the 'Screen Saver' appears to only (slightly) dim the display -- it doesn't turn it off.Is this normal ?

author: TheSteve
author_rank: Unknown
timestamp: December 17, 2020, 06:17:35 pm
content: Quote from: JohnPi on December 17, 2020, 05:34:53 amYes, this is normal.
Rigol MSO5074 or Siglent SDS2104X Plus ? - Page 1
Forum section: electronics / testgear

author: Finderbinder
author_rank: Regular Contributor
timestamp: December 17, 2020, 11:47:46 am
content: Hello,I know each device has been discused. But mostly at launch period of each. So not much direct comparisons of both at current date perspective. I watched Dave's review of MSO5074. But it had early firmware. UI lags are rather annoying for me and I have no clue if that was/would be fixed in other fw versions. And so many aspects (bugs) were discussed earlier left unanswered.Generally it looks for me like Rigol offered a super specs hardware (8 GSa/s (not any review of it), Spectrum analyzer (didn't found any review of it),...) but it left without propper implementation.SDS2104X Plus, has bigger display, better responsivenes, more eye candy UI, firmware updates seems to come out regularly, but... less features, 2 GSa/s, much higher price.Long story short, at first I was tended towards Rigol, then I saw Siglent, now I am lostP.S. by now I have Tektronix TDS3012B and Protek 1006. Just wanted to try something modern for a reasonable price.

author: pascal_sweden
author_rank: Super Contributor
timestamp: December 17, 2020, 01:43:45 pm
content: Check my thread:https://www.eevblog.com/forum/testgear/best-350mhz-scope-in-a-hackable-world-(siglent-sds2104x-plus-or-rigol-mso5072)/

author: tautech
author_rank: Super Contributor
timestamp: December 17, 2020, 04:51:47 pm
content: Howardlong does a fair comparison here:Note there at this time been a SDS2000X Plus firmware update that has addressed points bought up by Howard.
Siglent Warranty Question - Page 1
Forum section: electronics / testgear

author: alpha_rolf
author_rank: Newbie
timestamp: December 17, 2020, 11:36:16 am
content: Hello everyone,I just ordered my Siglent SDS1104X-E oscilloscope yesterday and it should arrive today. I got the invoice with the serial number already and checked it on the "Check Your Warranty Status" site. It says: "Warranty period to： 2023-11-28". Does this mean I got a returned product resold to me again?! If this is true, I am a bit angry because I could buy returns cheaper on the Siglent web-store and pay not the full retail price.Thanks!

author: masterx81
author_rank: Frequent Contributor
timestamp: December 17, 2020, 11:53:09 am
content: Also my serial show the same date, ordered 1 1/2 weeks ago, arrived 4 days ago. The siglent warranty is 3 years. Normally an oem use the production date (or the last date that they have it before shipment to sales points) as warranty start, then correct it when you need to use the warranty services (asking the proof of purchase), at that time they update theyr records. Siglent is unaware when a product is sold, the only proof is the invoice.Let me bet: You bought it from meilhaus?

author: rf-loop
author_rank: Super Contributor
timestamp: December 17, 2020, 01:48:26 pm
content: I think it is very clear.Whole warranty info is herehttps://www.siglenteu.com/service-and-support/warranty-information/Quote from: Warranty Information

author: masterx81
author_rank: Frequent Contributor
timestamp: December 17, 2020, 02:03:17 pm
content: When you claim the warranty, is valid the date on the invoice. But siglent isn't aware of every oscilloscope sold from every reseller. So, at their records on the website there is the manufacturer’s delivery date.When you claim the warranty, if you show the receipt, is used that date.The date reported on the website is absolutely correct. Most manifacteurs or authorized service point update their records if the product if returned for servicing in warranty period (if the receipt is provided).

author: rf-loop
author_rank: Super Contributor
timestamp: December 17, 2020, 02:47:24 pm
content: Quote from: masterx81 on December 17, 2020, 02:03:17 pmIt is exactly as I quote Siglent official statement about warranty. Period.Siglent also keep track about all serials what have sold to parties what have purchased then from Siglent. When this party, distributor or other Siglent accepted party, sell it to end user. If he is normal good quality seller, he keep record what serial he have sold to individual end user because he have also record about all serials what he have get from Siglent. So normally it is fully traceable. Of course there is then sellers who sell oscilloscopes etc as what ever things like soap or milk bottles.
5$ K-Type thermocouple to measure soldering iron temperature tip - Page 1
Forum section: electronics / testgear

author: mimmus78
author_rank: Unknown
timestamp: August 01, 2014, 06:08:13 pm
content: I just want to share you a very simple trick to check the temperature of your soldering iron tip. By using this method I got a very good repeatability of the measurements up to the degree (C°) despite using a simple sub 5$ k-type probe. Don't think you can go any better than this even by using a dedicated tip thermometer.1. split the k-type thermocouple wires so you can stick yoursoldering iron tip inside the two wires.2. tin the tip of the soldering iron3. stick the soldering iron tip between the two wires of the thermocouple4. just slightly pull the thermocouple wires so they get good thermal contact with the soldering iron tip5. you should now have a very stable and accurate temperature reading on your multimeterI attached a photo just in case my English is too poor.PS: just ensure the two wires doesn't short before touching the soldering iron

author: charlespax
author_rank: Regular Contributor
timestamp: August 25, 2014, 04:57:34 pm
content: Nice trick! I wish I had known about it before I bought a dedicated tip thermometer

author: TimeBandit
author_rank: Regular Contributor
timestamp: December 17, 2020, 12:45:16 am
content: Old thread, I know.I'd like to try this, but need to pick up a thermocouple, something I know little about.Seems I need a beaded type like this one from Reed (limited to 500 degrees F):https://www.amazon.com/REED-Instruments-R2503-Beaded-Thermocouple/dp/B0142P11YC/ref=sr_1_7?dchild=1&keywords=k+thermocouple+beaded&qid=1608165497&s=hi&sr=1-7Thoughts?
AGILENT E9300B and E4418B problem. - Page 1
Forum section: electronics / testgear

author: MikeP
author_rank: Regular Contributor
timestamp: March 04, 2020, 05:33:32 pm
content: Hello all.Two problems in one place.E9300B sensor with 30dB attenuator. Usually gives readings ten times more than the actual value. But VERY rarely do I get the correct value. The sensor is disassembled, unfortunately there is nothing obvious. We have no experience with this device and I want to be careful. Perhaps the sensor is not hopeless. So I ask for help.And the second problem. The power meter often does not respond to the power button. All tests passed. The keyboard, connector, and ribbon cable are checked. Now we are checking the main board.I would be grateful for any help.

author: MikeP
author_rank: Regular Contributor
timestamp: March 08, 2020, 07:12:25 am
content: A small update. The problem with the power button has been resolved. One of the divider resistors was defective. Therefore, the logic gate received insufficient voltage. Everything is simple.Unfortunately, there is no solution with the sensor. But there is hope. Deformation may result in obtaining correct data. We still hope for community help. Thanks.

author: kirill_ka
author_rank: Frequent Contributor
timestamp: March 08, 2020, 06:04:32 pm
content: QuotePlease, describe your experiments and setup in detail. Do you get different readings while measuring the 50MHz calibration? How do you know what's the actual power? Do you have another power sensor to compare?

author: MikeP
author_rank: Regular Contributor
timestamp: March 08, 2020, 07:25:31 pm
content: Yes, we have a second power meter and two GHz generators.At the moment, 4418 without any problems.Most likely, the problem is in the sensor. By deforming the sensors PCB, we get true results. Under the microscope, everything is perfect.But until I hear experienced comrades, I don’t want to do anything. The price of the error is very high.

author: chinhcheng
author_rank: Contributor
timestamp: December 15, 2020, 03:50:01 am
content: Hi, Could you please show me detail about the way to resolve the power button of E4418B?I have 2 of these units that need to repair the power button.Thanks so much in advance

author: MikeP
author_rank: Regular Contributor
timestamp: December 16, 2020, 06:19:12 am
content: Hello.I will not add anything new. The button is serviced by a logic IC. In my case, one of the divider resistors was damaged. This is not the only failure option, obviously.You have to check if the resistors are good and the voltage / resistor ratio is correct. The scheme is very simple.BR.