hybridfree/eevblog-posts huggingface dataset:
Poor Fluke handheld DMM display angles - Page 1
Forum section: electronics / testgear

author: bitbanger
author_rank: Regular Contributor
timestamp: May 28, 2018, 07:32:40 pm
content: Has anyone experienced similar display angle issues on a newer Fluke DMM? Unless viewing dead on, it "washes" out. In the real world you can't always position the meter perfectly. I expect this to some degree but these aren't absurd angles. Never noticed this problem on my personal '87V which is considerably older.Distributor wouldn't do anything about, sort of laughed it off. Am I being too picky (I mean it's not my money, just looking out for the company/other techs)?? My 10-year old factory stereo in my truck (super-twist LCD display I believe has amazing viewing angle). I suspect this may be the lens assembly causing this?Multiple other images here:https://imgur.com/a/w1wFp8m

author: ataradov
author_rank: Super Contributor
timestamp: May 28, 2018, 07:58:58 pm
content: This is absolutely not normal. LCDs do have "dead angles", but segments should change equally. I would just return it. An may be don't buy another Fluke.Although this one looks somewhat used. Was it like this from the beginning?

author: mzacharias
author_rank: Frequent Contributor
timestamp: May 28, 2018, 07:59:28 pm
content: You could try cleaning (or replacing) the elastomers for the LCD.Also Fluke might fix it for free.

author: bitbanger
author_rank: Regular Contributor
timestamp: May 28, 2018, 08:08:57 pm
content: Yeah this was a problem from day one on a brand new meter - which was why I turned to distributor first. I've since left the company but I happened to find the pictures on my phone and thought I'd see what you guys thought.

author: WhichEnt2
author_rank: Regular Contributor
timestamp: June 03, 2018, 08:04:46 am
content: No, it is not normal. All active segments should change it's contrast simultaneously.

author: frogg
author_rank: Regular Contributor
timestamp: April 03, 2019, 12:32:23 am
content: Mine is exactly the same. Does two 87V's make it "normal"?It only happens when the backlight is on.87V's have meh LCD's - it is well known. Unsurprising since the design and therefore components spec is from 20 years ago. They are great meters overall, but Fluke hit a winner in the 90's and just keeps buying the same suppliers components for decades. That's the strength and weakness of the 87V. It is what it is. What do you want? Just measure stuff. Stop worrying about viewing angles, or buy a DMM that was designed and spec'd in the naughties.Note: non-backlit LCD's from the same era (like the original 85) have sharper LCD's. You'll notice that the contrast went down when they switched to backlits like the 87 in later years.
Tenma 30v 3A power supply’s info - Page 1
Forum section: electronics / testgear

author: Gazmon
author_rank: Regular Contributor
timestamp: April 01, 2019, 11:10:14 pm
content: HiDoes anyone have experience of these I have the 30v 3A single version, if I buy another would I be able to link these togeather to get a negative and positive voltage output?Thanks for any informationGazmon

author: coromonadalix
author_rank: Super Contributor
timestamp: April 01, 2019, 11:42:18 pm
content: you put 2 serials psu in serial like the photo, the common point will be your groundV+ and ground for your positive voltageV- and ground for your negative voltage

author: BobRyan
author_rank: Contributor
timestamp: April 02, 2019, 02:55:16 am
content: I'm not familiar with that supply but make sure earth ground isn't tied to 0v if you want to do this. It's often isolated but in that case a green earth ground terminal should be present.

author: Kean
author_rank: Unknown
timestamp: April 02, 2019, 04:45:59 am
content: There is a bunch of different Tenma models, so I'm guessing something like the 72-10480.The outputs are isolated from mains, but there is an earth terminal that you can optionally connect to either the positive or negative (usually the latter). As the output is floating you can do what you want, but there are safe voltage limits that you can float the voltage without exceeding the isolation. I don't see any details of this in the specifications, so I'd recommend keeping it below 50V above earth.

author: Gazmon
author_rank: Regular Contributor
timestamp: April 02, 2019, 10:10:44 am
content: Quote from: Kean on April 02, 2019, 04:45:59 am72-10480 Yes that is the model I have , and I would using it to 15v max to be honest , for op amps etc , so I’m guessing on the advice above a second unit would give me what I need positive and negative related

author: Kean
author_rank: Unknown
timestamp: April 02, 2019, 10:22:05 am
content: Quote from: Gazmon on April 02, 2019, 10:10:44 amOK, so here is a picture of two of those set up for +/-12V. The green cable from earth to 0V is optional.

author: Gazmon
author_rank: Regular Contributor
timestamp: April 02, 2019, 11:00:55 am
content: Quote from: Kean on April 02, 2019, 10:22:05 amYes thanks , that confirms what I can do , I will get a second unit , thanks for all input above
Rigol warranty sticker not removable - Page 1
Forum section: electronics / testgear

author: Gioreva
author_rank: Contributor
timestamp: April 08, 2017, 07:00:06 am
content: My warranty sticker is non-removable.I'm studying to make a copy for me, perhaps to sell it.

author: gnif
author_rank: Unknown
timestamp: April 08, 2017, 08:13:07 am
content: Dave has a video on this already.

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: April 08, 2017, 08:14:47 am
content: These are easily removable.For me, the most convenient way of doing it is preheating it with my hot-air station set to lowest temperature, or use a hairdryer. Then I use a piece of PTFE, that I cut to a very flat wedge / knife.Works every time.

author: Gioreva
author_rank: Contributor
timestamp: April 08, 2017, 08:30:33 am
content: This is different.It breaks allI warmed up as soon as I touched you have already removed the piecesOnly I have this type of adhesive?

author: gnif
author_rank: Unknown
timestamp: April 08, 2017, 08:48:35 am
content: Rigol have not changed their sticker, it is still the same one that everyone else here has had success removing using the above information, it just takes patience. A teflon or PTFE scraper is very handy here also.

author: Gioreva
author_rank: Contributor
timestamp: April 08, 2017, 08:50:19 am
content: If you look at my pictures, my adhesive is different.I can not remove.I've already ruined

author: autoelectra
author_rank: Contributor
timestamp: April 06, 2019, 09:07:00 pm
content: No problem, I have your warranty stickers.If someone needs some stickers, can contact me.
Fixing oscilloscope future prediction circuit - Page 1
Forum section: electronics / testgear

author: AutogolazzoJr
author_rank: Regular Contributor
timestamp: April 01, 2019, 08:50:59 pm
content: I own a phillips/fluke PM3394. The oscilloscope is supposed to be able to view up to one acquisition or 32768 points before the trigger. Unfortunately, my scope is not up to spec. It seems to make weird clicking noises when over 88 or so points. Beyond that, the oscilloscope heats up and the screen becomes incredibly bright. I could feel imense stress on the crt vacuum tube and decided not to use any more negative trigger delay. The positive trigger delay seems to work fine, and the circuits seem plenty patient to display the waveform after the trigger. I assume this is is something wrong with the future prediction circuit that will use algorithms to predict when the trigger will activate. Is it also possible that there is something wrong with the trend learning/hopping circuit or the shark jumping circuit? Any help would be appreciated.

author: Fungus
author_rank: Super Contributor
timestamp: April 01, 2019, 08:58:49 pm
content: Quote from: AutogolazzoJr on April 01, 2019, 08:50:59 pmThat's the dolphin capacitor, maybe it's drying out. Open it up and look for salt deposits around the shark jumper wire.

author: luma
author_rank: Regular Contributor
timestamp: April 01, 2019, 11:02:25 pm
content: This bears all the hallmarks of an underpowered device. Is your power supply able to handle the load? I suspect you'll be needing something north of 1.2GW for this to work correctly.
Is it possible to generate waveforms with an "upgraded" Rigol DS1054Z? - Page 1
Forum section: electronics / testgear

author: typoknig
author_rank: Regular Contributor
timestamp: April 06, 2019, 07:32:49 am
content: I'm getting ready to upgrade from a Bitscope BS10U to my first "real" dedicated scope. I've watched all of Dave's videos on the DS1054Z and with it's feature set, popularity, and "upgradeability" it seem like my best choice. One feature that a non-upgraded DS1054Z for sure doesn't have is waveform generation. The DS1074Z does have waveform generation and seems to share the exact same hardware as the DS1054Z, but it is unclear to me if there is an upgrade path that would enable waveform generation on the DS1054Z.

author: Helix70
author_rank: Unknown
timestamp: April 06, 2019, 07:38:43 am
content: No, only the models with -S (DS1074Z-S) have the components populated for the waveform generator.

author: typoknig
author_rank: Regular Contributor
timestamp: April 06, 2019, 07:49:42 am
content: Ok, I see now reading the Q/A on Amazon for the DS1074Z that commenters have said the same thing. The "S" models must have different hardware. You say that the components are not populated, does that mean the PCB between the "S" and non "S" models are the same and possibly just missing a few key parts? I'm curious to know if anyone has tried to add signal generation to a DS1054Z or a DS1074Z via a hardware mod.

author: ebastler
author_rank: Super Contributor
timestamp: April 06, 2019, 07:57:05 am
content: https://www.eevblog.com/forum/testgear/rigol-ds1074z-s-ds1104z-s-signal-generator-daughterboard/

author: typoknig
author_rank: Regular Contributor
timestamp: April 06, 2019, 01:44:36 pm
content: Thanks, that answers all of my questions!
TURN Dynamic Systems High Stability GPSDO - Page 1
Forum section: electronics / testgear

author: jpb
author_rank: Super Contributor
timestamp: March 31, 2019, 07:53:16 pm
content: I've recently noticed a new GPSDO appearing on ebay. It is based on a module from "TURN Dynamic Systems" whom I've never heard of but the claimed specs are quite impressive.The price is also rather high (at least for a GPSDO from China whose core module is around 10 years old):https://www.ebay.co.uk/itm/NEW-High-stability-accuracy-GPSDO-GNSS-Disciplined-Oscillator-Frequency-Standard/264248687890?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649Does anyone know of the company that makes (or made) the module?Has anyone bought one of these? They are a little pricey for the average hobbyist by a factor of at least two times but I'm curious.
MOVED: Agilent 3458A GPIB Data Aquisition software and options ? - Page 1
Forum section: electronics / testgear

author: HighVoltage
author_rank: Super Contributor
timestamp: March 31, 2019, 10:27:08 pm
content: This topic has been moved toMetrology.https://www.eevblog.com/forum/index.php?topic=75098.0
Issue with Fluke 902 Clamp Meter - Page 1
Forum section: electronics / testgear

author: Elektrongeek
author_rank: Contributor
timestamp: March 29, 2019, 07:11:35 pm
content: Hello everyone ,I have bought for a very cheap price a Clamp meter form fluke , the 902.My issue is that it is stuck in Cal Mode (displaying CAL on startup)In the battery compartement the cal sticker is broken.Do you know how to unstuck this meter form CAL mode ?Cheers From France !

author: PTR_1275
author_rank: Frequent Contributor
timestamp: March 30, 2019, 12:16:37 am
content: The fluke 374/375/376 has 2 contacts behind a calibration sticker in the battery compartment that need to be shorted when the meter is turned on for it to go into the calibration mode.I can’t find the cal manual for the 902 that says how to get it into calibration mode, but it might be something similar and someone may have soldered a bridge to make it easier when they were calibrating it?Can you take some photos of it?

author: Elektrongeek
author_rank: Contributor
timestamp: March 30, 2019, 12:48:43 am
content: Hello , the contacts behind seems to be brand new , no trace of any solder !Please find 2 pictures attached

author: retiredcaps
author_rank: Super Contributor
timestamp: March 30, 2019, 12:54:26 am
content: Did you buy this meter new or used? From where? ebay? Fluke authorized dealer?

author: Elektrongeek
author_rank: Contributor
timestamp: March 30, 2019, 01:01:01 am
content: I bought It used , from LeBonCoin (french Craiglist) was delivered with the original box and probes.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 30, 2019, 01:10:46 am
content: Looks like you might have been scammed. Now there could a way to bypass "CAL", but manual sayshttps://assets.tequipment.net/assets/1/26/Documents/Fluke/902_calibrationinformation.pdf"When the Meter displays CAL, the unit will lock and no measurements can be made. The Meter must be sent to a Fluke Service Center for repair."

author: Elektrongeek
author_rank: Contributor
timestamp: March 30, 2019, 01:16:07 am
content: Ok , i will see with Fluke aftersale service ^^it had only costed me something like 20 €

author: retiredcaps
author_rank: Super Contributor
timestamp: March 30, 2019, 01:19:11 am
content: A quick search of other Fluke clamp meters that have calibration info might give some possible things to try like (page 12). This may or may not work on the 902. I don't know enough about Fluke clamp meters to know how they are calibrated.https://www.instrumart.com/assets/772-773-cal-manual.pdfA short button push (1 second) changes the Meter to the first calibration stepA long button push exits the Meters calibration mode

author: Elektrongeek
author_rank: Contributor
timestamp: March 31, 2019, 10:02:30 am
content: i have tried , but it didn't worked for me ! i have contacted Fluke french aftersale service , waiting for a response
MicroCurrent gold availability? - Page 1
Forum section: electronics / testgear

author: Rolo
author_rank: Regular Contributor
timestamp: March 29, 2019, 04:17:22 pm
content: Is there any news on the MicroCurrent gold availability? Shows out of stock for a while now. Will it come back? Doing a project with battery powered devices and would like to buy one. Simon is also out of stock, I'm in europe so buying from him is the most economical choice.(Before the brexit kicks in ....)

author: Wimberleytech
author_rank: Super Contributor
timestamp: March 30, 2019, 03:30:04 pm
content: Quote from: Rolo on March 29, 2019, 04:17:22 pmBeen wondering the same thing. Pondering just building one. Digikey has links to gerbers and parts etc. Seems there is little demand, otherwise someone would be supplying them. Hmmmm.....

author: timgiles
author_rank: Regular Contributor
timestamp: March 30, 2019, 03:34:17 pm
content: Isn't there a new version coming out soon or am I thinking of another updated Web product?

author: Noy
author_rank: Frequent Contributor
timestamp: March 30, 2019, 06:45:45 pm
content: Welectron in the EU has them "available" within 30 days.
Ando/Yokogawa AQ6319 Optical Spectrum Analyzer - Page 1
Forum section: electronics / testgear

author: wldshy
author_rank: Contributor
timestamp: March 30, 2019, 04:44:51 pm
content: Is there any one have system restore image and maintenance procedure for Ando/Yokogawa AQ6319 Optical Spectrum Analyzer?I get one AQ6319 with PSU failure, I am trying to bring back to life. Now the PSU & embedded PC works fine, but I cannot obtain its drivers/operating system image.Hardware:PCI\VEN_1172&DEV_6317&SUBSYS_00000000&REV_10PCI\VEN_1172&DEV_7410&SUBSYS_00000000&REV_10Is there anyone have any idea about it or can give some help?Thanks
Vectorscope app for Android - Page 1
Forum section: electronics / testgear

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: March 26, 2019, 04:17:23 am
content: This post technically involves a piece of test equipment.When I was browsing for vectorscopes on eBay, I came across a Harris TVM-850-E which the fitted video inputs were entirely digital and can do measurements on a selected video input in the digital domain and display the results like a vectorscope.Considering this find, I am looking for an Android app which can analyse a live colour image and display the results like a vectorscope.

author: ebastler
author_rank: Super Contributor
timestamp: March 28, 2019, 08:57:14 am
content: How would the video stream get into the Android device?

author: ewaller
author_rank: Contributor
timestamp: March 30, 2019, 03:44:03 pm
content: Possible transports:TCP over WiFiBluetoothAsynchronous serial over a FTDI based USB adapter.My Sigalent 1204x-e has a mechanism where you can download the trace data from the web interface; Android could certainly grab that too.Sounds like an interesting project. The real problem is going to be getting the data out fast enough to provide a rational update rate, and the latency introduced by the time required to transport, then analyze the data.
Tektronix time-base 7B92A dies after 5 seconds  - Page 1
Forum section: electronics / testgear

author: jonpaul
author_rank: Super Contributor
timestamp: March 30, 2019, 09:07:50 am
content: Hello all,I Have a pair of 7B92A and a 7B92, all in various states of disrepair or disassembly. A fine example of Tek design, a very versatile time-base.From the three, I hope to get one working to use in 7904, 7104 mainframes. The remaining junker might yields some tunnel diodes or other spare parts. The best is a 7B92A, works fine for 5 seconds and then completely dies,It seems like a power support is getting loaded or shorted after 5 seconds. The PCBS are loaded with molded radial tants. Yet none are visibly darkened or split. What's the best proceedure to locate a possibility shoted tant or could it be elsewhere?Or just replace every tant?Many thanks for your advice!À Bientôt,Jon

author: tautech
author_rank: Super Contributor
timestamp: March 30, 2019, 09:16:38 am
content: Pull some wires from the rails to the outside and monitor the rails for voltage stability. At least that will tell you which rail with tants on it to focus on.Pay particular attention to tants with little voltage headroom above the rail its on.

author: jonpaul
author_rank: Super Contributor
timestamp: March 30, 2019, 12:53:43 pm
content: Hello again: Many thanks for the fast reply!NOT A TANT!1/ all other power is OK! Had assumed the very slow appearance of the bug meant thermally related.2/ Instead it is related to time/div cam switch and variable: just touching the var knob would cause delaying and/or delayed traces to slowly shrink towards the left.3/ I tried to clean and exercise time/div using only 100% isopropylene alcohol, injected into slots. No go.4/ Removed board on opposite side of time/div cam switch, check for loose screws on switch and injected alcohol thru holes. No go.5/ Finally realized the var switch in center red knob of time/div may be the culprit.6/ var Switch is at the back of long shaft, has a plastic actuator moving fingers on PCB.Used same alcohol/exercise, IT WORKS!The cause must be a marginal contact, opening after some time or movement, with timing Rt open circuit, the trace moves and shrinks slowly left.Doing this repair, and removing the board on 6 precision standoffs, with about 30 0.025 long pin interconnects, I could only marvel at the electronic and mechanical engineering in the plugin! Fortunately I have the original TEK service manulas for both 7B92 and 7B92A.Really a great plugin especially with 500 pS/div and extensive triggering capabilities. I will compare to 7B92A.I welcome comments from you TEK 7Bxx mavens!Cheers,Jon
[ask+help] rigol MSO1104Z signal protocol decoder - Page 1
Forum section: electronics / testgear

author: e0ne199
author_rank: Regular Contributor
timestamp: March 28, 2019, 10:54:48 am
content: hello everyone...i just want to ask something about MSO1104Z before buying it..anyway, as far as i know MSO1104Z can decode RS232,I2C and SPI but is there any way to decode signal like RS485 or CAN bus using PC software, if the oscilloscope doesn't have firmware to do it ?i really need to know this before buying one because i am afraid that i can't use this oscilloscope to analyze signal protocols other than what this oscilloscope is capable of....any feedback is really appreciated

author: hexreader
author_rank: Frequent Contributor
timestamp: March 28, 2019, 12:21:27 pm
content: Disclaimer - my opinion only... ...but based on owning MSO1104z-s and DS1054zDon't buy MSO - buy DS1054Z and a separate logic analyser. Cheaper and far better.QuoteYou are right to be afraid - be very afraid.

author: Gege34
author_rank: Contributor
timestamp: March 28, 2019, 03:43:39 pm
content: Generaly (I don't know a scope where it's possible) a scope provide limited number of protocols decoder and it's not upgradable by the user.One possibility is to useSigrokto decode alot of protocols (you can write your own) :.Personally I have a Siglent SDS1104X-E and I use aDS-Logic Plus(base on sigrok software) when I need more complicated or not supported protocols.

author: Fungus
author_rank: Super Contributor
timestamp: March 28, 2019, 06:51:46 pm
content: Quote from: e0ne199 on March 28, 2019, 10:54:48 amProbably, but you're better off getting one of those$6 USB logic analyzersoff eBay.

author: ebastler
author_rank: Super Contributor
timestamp: March 28, 2019, 08:13:34 pm
content: Quote from: e0ne199 on March 28, 2019, 10:54:48 amYou are afraid that this oscilloscope can't do what this oscilloscope can't do?A valid concern, I'd say...

author: e0ne199
author_rank: Regular Contributor
timestamp: March 28, 2019, 09:29:37 pm
content: Quote from: ebastler on March 28, 2019, 08:13:34 pmlol i mean i would be unable to analyze other signal protocols than the ones built into this oscilloscopeanyway thx for the response everyone
[Solved] PXI system questions - Page 1
Forum section: electronics / testgear

author: blueskull
author_rank: Unknown
timestamp: March 28, 2019, 08:22:39 am
content: Test gear gurus,Is there anyone who has dealt with PXI systems from NI and KS?I'm looking into build a cheap (relatively) PXI system with the following components:1. NI PXIe-8301 Thunderbolt 3 PXIe controller2. NI PXIe-1078 PXI/PXIe chassis3. KS M9240A auto probe I/F4. KS M9243A 1GHz 2ch scope *25. KS M9111A SMU *36. A 6.5-dgt DMM of any brand I can scavengeHere are the questions:1. I don't want to spend $ on LabView nor its ilks. Can I still use an NI chassis and controller card?2. If I use a measurement card (a DMM perhaps) from NI, can I still get around without LabView? I'm willing to code with VISA/SCPI as long as it's not something complicated as a scope.3. KS IO Suite is only available on Windows and Linux. How can I get it to run on a Mac? Or alternatively, how can I passthrough thunderbolt devices over to a desktop VM (not the expensive ones like ESXi)?Thanks for your help.Solved. Ordered a Keysight embedded controller w/ Windows 7 pre-installed.

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: March 28, 2019, 09:29:35 am
content: Is this as replacement for a general lab, or for automated test (or tests that require a lot of automation, like characterization of circuits or chips)? If the latter, I would say why not just invest in a small dedicated computer and run matlab/python/whatever on that to do your measurements?I don't have much experience with PXI systems, but I'm used to just running a computer and talking SCPI to my instruments regardless of the formfactor.

author: Gribo
author_rank: Frequent Contributor
timestamp: March 28, 2019, 11:44:59 am
content: You can use PXI with any language (Python, C#, VB). It becomes useful when you need high instrument density (Lots of scope channels, DIO, power supplies in a 4U form factor) and tight timing/triggers that standard benchtop devices can't provide, otherwise it is just a very expensive equipment rack.
Atten F2700-C - why 13 MHz as a reference? - Page 1
Forum section: electronics / testgear

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: March 28, 2019, 07:35:18 am
content: This frequency counter has an 8051-compatible MCU which contains two 16-bit timer/counters using a reference frequency of 13 MHz which I consider to be unusual for this application.For a 13 MHz reference, the highest timer/counter modulus-free result ((13 * (10^6)) / 65000 = 200) which is 99.182% of its maximum of (65536 - 1) before overflow, but if we use a more common 10 MHz reference ((10^7) / 62500 = 160), we only get 95.367% of its maximum.In this case, a result of 200 would be an easier division ratio compared to 160.
help TEKTRONIX 491 C band oscillator components  - Page 1
Forum section: electronics / testgear

author: harrimansat
author_rank: Regular Contributor
timestamp: April 01, 2019, 07:03:14 am
content: Hi, I´m fixing a tek 491, PLL is not working, one of the varactor diodes inputs is shorted. I have opened the oscillator box, is the second version, solid state, and it there´s two burned components, a diode? and a resistor.Can someone help me with the correct values?
Info on Gould/Siemens DSO demonstration device sought - Page 1
Forum section: electronics / testgear

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: March 28, 2019, 12:36:31 am
content: A tough nut for the scope experts:This SIEMENS labeled device stems from the time when Siemens T&M sold relabeled Gould oscilloscopes. That I know for sure, as I had once seen the same thing in it's original Gould livery.It was associated with a certain 4-channel DSO of the 100..200Ms/s class, not sure which one it was anymore.It was used as a demonstration aid for some of the more advanced features of the instrument, such as glitch triggering, waveform envelope etc. So I figured that it might be useful for verification of similar functions on other scopes. Or for testing other instrumentation, where it might be useful to be able to add noise to a known signal etc.On the back is a cryptic list of waveforms, lacking any parametric information. Some of those patterns show up upon selection, some do not. Also, the action of the 'Glitch' and 'Noise' selections as well as the 'Start' button are less than clear from the experiments which I have performed. Same for the ranges of the possible adjustments.Inside is a Xilinx FPGA and an EPROM and some analog components on the hidden side.RfI to Teledyne-Gould-Nicolet came up as 'you have a WHAT?', a couple of hours of Internet research came up with a archived picture of exactly the auction from which I got it (years ago) - and nothing else.Now a final try before it becomes a 'whatever box': did anyone come across it and can contribute additional information, which might make the little wonderkludge useful? Maybe in a DSO manual of Gould/Siemens?

author: bitseeker
author_rank: Super Contributor
timestamp: March 28, 2019, 05:46:48 am
content: Never seen one, but now I have to follow along to learn more about it.
Megger pat32 portable appliance tester - Page 1
Forum section: electronics / testgear

author: downwind27
author_rank: Newbie
timestamp: March 26, 2019, 10:44:20 pm
content: I've had a Megger PAT32 for quite a few years but now it's playing up. Takes ages to start up and often sticks on the display test routine. I noticed that after pressing the two outer switches it shows 'cal' in the display and stays there - presumably waiting for some input. A calibration function is not mentioned in the user manual and I can't find any service information anywhere - does anyone have any clues? There are a couple of pots inside the unit so there must be some setting up procedure somewhere.

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 26, 2019, 11:09:22 pm
content: No experience with this model, a few things you could check:Traces of battery leakage or corrosion.Poor or dirty contacts: test sockets, internal fuse holder, relays, power switch...Bad capacitors: look more specifically around any SMPS section HV or high current source, CPU supply.If it is still working once you are past the long startup time, going by the spec sheet, there are a number of tests you could carry out with a DMM, clamp meter, resistors to check if the PAT32 is generating voltages and currents in the correct ranges. This could point you to what section may be failing.
Agilent OLED display issues?  - Page 1
Forum section: electronics / testgear

author: jdurango
author_rank: Contributor
timestamp: March 26, 2019, 12:22:43 am
content: I'm looking at a used Agilent U1253b with the OLED display. I understand the u1252a's had major issues with fading over time. Does anyone know if they fixed this with the revised B model or have any personal longterm experience with the 1253b?And if OLED is inherently flawed and there no way to "fix" it, why would they choose to continue using this technology in their revised model after having so many obvious problems with the A?Thanks fellas!

author: PTR_1275
author_rank: Frequent Contributor
timestamp: March 26, 2019, 02:10:56 am
content: The U1252A is a LCD screen not a OLEDI’ve been hesitant to get a OLED display from keysight after their demo unit at a trade day looked horrible.

author: jdurango
author_rank: Contributor
timestamp: March 26, 2019, 02:17:41 am
content: Oops, typo, u1253a had major issues. The 1253b looks great, and if the screen were to die tomorrow I could replace it.....but I'm worried about the screen dying a few years from now when the part is unavailable. At that point it becomes a paperweight. Pretty stupid idea on the part of Agilent.....and the fact that they carried it over to the B models is just irresponsible. Might be wise to go with Fluke or Brymen.

author: Fungus
author_rank: Super Contributor
timestamp: March 26, 2019, 07:39:44 am
content: Quote from: jdurango on March 26, 2019, 12:22:43 amDepends what you mean by "flawed" - some people don't see it as a flaw.Quote from: jdurango on March 26, 2019, 12:22:43 amBecause "Oooooh! Shiny!".Enough people still want multimeters that chew through batteries like there's no tomorrow and fade after a couple of years to make it viable.
Siglent 3021x - How do you take screenshot? doc is wrong. - Page 1
Forum section: electronics / testgear

author: nealix
author_rank: Regular Contributor
timestamp: March 26, 2019, 12:15:38 am
content: OK, I have just wasted 2 hours trying to decode the crap user manual.When I follow the user manual for the "FILE" operations, or if I also lookat this webpage;https://www.siglentamerica.com/operating-tip/save-file-ssa3000x/then the only thing that happens is a get a screenshot of the entire FILE BROWSER window,NOT of the spectrum analyzer trace and screen text. I tried this multiple times, to external USB,using half a dozen file names, and each time I get a full screen picture of the FILE BROWSER windowand not the analyzer trace screen. Google was NOT my friend for this, nor was searching youtube.They sure took great pains to make this less than obvious.Help please?Cheers,NealN6YFM

author: tautech
author_rank: Super Contributor
timestamp: March 26, 2019, 07:22:31 am
content: SSA3032X latest FW V1.2.9.2aIn normal spectrum analyser display mode:Insert USB drive and wait for USB drive icon to appear on top bar of display.Press Save button (above encoder) and a box appears to give an option to change Save filename.Press Enter to save file with a default filename.Note: if saving to just one folder and not editing the filename (using default), the SSA3000X will automatically increment the default filename #.Edit to addPress File button and check Save Type is set to PNG for screenshots.
EMI Toolkit - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: March 25, 2019, 01:40:10 pm
content: In some cases when making a trip to the compliance lab for a pre-scan, the device is marginal or fails slightly and a little tweak is all that is needed to get below the line. The compliance lab I usually use, keep a decent selection of clamp filters etc. I also have a little kit; copper tape, common mode chokes, clamp filters, etc.What other goodies do you bring along when heading to the compliance lab?

author: RFDUK
author_rank: Regular Contributor
timestamp: March 25, 2019, 02:40:10 pm
content: Not a direct answer to your question, but another option worth a mention ...Rather than using a Compliance Lab for first look and remedial testing/dev, find a specialist in pre-comp testing close to you with a product design skill set as well as thorough EMC testing knowledge.I've offered such services, emissions and immunity, since the start of the EU EMC Directive in the mid 90's. Such a specialist should have all the support hardware, components and expertise to guide your EMC remedial work down the right path in terms of cost effective solutions.Compliance labs, even the good ones with remedial support, will often take much, much longer to arrive at solutions than a EMC pre-comp specialist. The difference in time to solution and hour rate typically results in (better) outcomes at a quarter of the cost. For high volume products where unit cost is critical such a specialist is indispensable, although many manufacturers will have the resources in house.An important issue in pre-comp testing is how well the results correlate with a full compliance tests. Whilst I would encourage anyone to start on the learning curve, there is no magic bullet here and years of experience count. Carrying out accurate quick look see tests in one tenth of the time compared to systematic compliance lab procedures can be achieved but comes with experience.

author: Jester
author_rank: Frequent Contributor
timestamp: March 25, 2019, 03:43:30 pm
content: I do a pre-pre-scan here, I have SA, LISN's, NF probes etc. Usually the conducted aspect mirrors the lab fairly closely, radiated is another story. Good point though, there is a semi-retired expert near by, I should at least give him a try next time I have "issues"
What is the name of this thing (for simple AC power measurements)? - Page 1
Forum section: electronics / testgear

author: IAmBack
author_rank: Regular Contributor
timestamp: March 29, 2019, 12:53:20 pm
content: I've noticed "magic" BLACK box on this video (at 2:25) with AC socket and jumpers:https://youtu.be/4VedR-NUORMI'd like to buy such thing. I know, that it's quire easy to be build on my own, but I like "safe" jumpers, which are "essential" for this design...What is the "merchant" name of this thing or, maybe, where it can be bought?Regards.Edit. O'k, I've found jumpers, but still...

author: PTR_1275
author_rank: Frequent Contributor
timestamp: March 29, 2019, 01:16:53 pm
content: Google AC Test Fixture and that should bring up a few different varietiesSomething like thishttp://www.testequipmentdepot.com/instek/accessories/test-fixtures/ac-test-fixture-for-gpm-8213-gpm-01.htmCompanies that make power analyzers (Zimmer, voltech etc...) make them too bit be prepared to pay big $$$$$ (for essentially a box with a fuse, switch, mains socket and some banana sockets)If you have a clamp meter, these are really handy. Gives you 1x and 10x current (just the active looping around 10 times).https://mymeter.com.au/product/ht-instruments-ha000951-line-splitter-separator/

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: March 29, 2019, 04:41:05 pm
content: Mine is from BEHA (Unitest) and has phase lamps and a GFC test button.Didn't find it right online right now, but here are some others:https://www.conrad.de/de/messadapter-schutzkontakt-stecker-buchse-4-mm-schutzkontakt-kupplung-beruehrungssicher-voltcraft-sma-10-schwarz-123980.htmlhttps://www.pce-instruments.com/deutsch/messtechnik/messgeraete-fuer-alle-parameter/leistungsmessgeraet-pce-instruments-pce-pa-adp-schuko-leistungsadapter-adapter-det_5885283.htmhttps://www.gmc-instruments.de/produkte/software-und-zubehoer/zubehoer/multimeter-handkalibratoren/messadapter/pma16/
APC-7 to N-F adapters - Page 1
Forum section: electronics / testgear

author: rhb
author_rank: Super Contributor
timestamp: March 23, 2019, 08:03:00 pm
content: Does anyone have any experience with adapters sold on Amazon by Custom Cables Group, LLC? I've asked Custom Cables for specs, but not heard yet because of the weekend. When I asked about brand I was told "generic" which doubtless means China. L-Com has a lot of stuff made in China as do other companies. I don't want to buy parts rejected by a reputable company.Aaren Technology in the UK makes them and sells them for $111 US each for a pair. They are specified as VSWR < 1.10 to 18 GHz. These are for the 85046A S parameter set for my 8753B VNA.I've got an 8560A with TG, so I can sweep them over most of the range of the 85046A, but I'd prefer to avoid having to return stuff.

author: Tony_G
author_rank: Super Contributor
timestamp: March 24, 2019, 01:58:59 am
content: Interested in hearing how this goes - I've never used them but I picked up a set of APC-7 to N adapters when I acquired a set of APC-7 HP Attenuators.Have you thought about APC-7 to N test cables?TonyG

author: rhb
author_rank: Super Contributor
timestamp: March 24, 2019, 12:27:16 pm
content: APC-7 coaxial connectors are harder to find than adapters and at least as expensive.

author: Bud
author_rank: Super Contributor
timestamp: March 24, 2019, 01:42:24 pm
content: I'd buy a pair from Aaren and be done with it. I would be more concerned about the N part of the adapter as this is where you may incur damage to your mating connectors if the mechanical tolerances are out of wack.

author: rhb
author_rank: Super Contributor
timestamp: March 24, 2019, 04:54:45 pm
content: That's almost certainly what I'll do.Custom Cables Group will have to come up with better documentation than "generic". That seems unlikely to happen. If they did their own QC, they would have said that when I asked about the brand/make of the adapters.Damaging the APC-7s on the 45076A would be a much bigger problem than damaging an N-M cable.

author: Bud
author_rank: Super Contributor
timestamp: March 24, 2019, 05:22:46 pm
content: APC7 is sexless, the mating surfaces are the same on both sides , being kept in contact by spring force. Whereas N has male pin mating with female socket and mechanical tolerances like pin and socket protrusion or diameter are important.
SDS7102: Impossible to set XY mode remotely? - Page 1
Forum section: electronics / testgear

author: JohnCC
author_rank: Newbie
timestamp: March 24, 2019, 11:13:13 pm
content: I've been using the Omron's rather poor XY mode, but what really bothers me:1) It seems impossible to set the scope to XY mode. At least I couldn't find any SCPI commandto do that2) When (manually) set to XY, only dot plotting is enabled (vector plotting doesn't seem tohave any effect).The firmware version is 4.7.2. Does anyone have a solution here?
Latest or Best Rigol DS2000 Series software? - Page 1
Forum section: electronics / testgear

author: DrBob
author_rank: Contributor
timestamp: January 04, 2017, 06:15:26 pm
content: I have the Rigol DS2202 with Software version 00.00.01 and Hardware version 1.0.I am getting the Upgrade bundle from Tequipment today to upgrade all the options from Trial to Installed - except the bandwidth, which I believe I already have purchased the top, 200 MHz, for this series.I want to consider upgrading the scope's software at this time.What is the latest software for this scope?Given that all software has bugs and those in the latest version are not repaired,in your opinion what is the best version available to upgrade this machine?Why that one vs other choices?Thanks for your help!

author: Grandchuck
author_rank: Super Contributor
timestamp: March 24, 2019, 08:12:16 pm
content: v00.03.05.03.03 2017/06/26Is the latest firmware. I just downloaded it. Does not seem to offer much beyond 00.03.05 which I already have. Yours is rather old and should be upgraded if you have not already done so.My hardware version is also 1.0

author: tv84
author_rank: Super Contributor
timestamp: March 24, 2019, 10:03:59 pm
content: I have the feeling he won't read you...

author: Fungus
author_rank: Super Contributor
timestamp: March 25, 2019, 07:30:58 am
content: Quote from: tv84 on March 24, 2019, 10:03:59 pmI get that sensation, too. Weird!

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 25, 2019, 09:10:32 am
content: Quote from: Fungus on March 25, 2019, 07:30:58 amyeah, as weird as it is, it might be usefull to other owners. so let it be
Keysight 3000T DC offset problem - Page 1
Forum section: electronics / testgear

author: apblog
author_rank: Regular Contributor
timestamp: March 24, 2019, 10:07:11 am
content: All of the channels on my Keysight MSOX 3104T have a displayed DC offset of about -0.25 mV, in 1:1 mode with no probe connected. That's -2.5mV with an x10 probe. This holds true for both DC and AC coupling.I've had this scope for about 3 years, and it was a keysight "premium used" refurb.I only noticed this because I was trying to look for dc offsets in a passive RF detection circuit.I was wondering if other 3000T owners have this same problem. I might be expecting too much accuracy...EDIT:they list the dc vertical offset accuracy as "± 0.1 div ± 2 mV ± 1% of offset setting", so I guess I'm doing OK with this scope.Still annoying though that it can't be tweaked out by the user. On an analog scope, you just adjust the vertical offset knob. But on a digital scope, adjusting the vertical offset knob changes the trace position, but of course all off the various read out numbers are still wrong.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 24, 2019, 11:25:46 am
content: Have you tried a self-cal ?

author: apblog
author_rank: Regular Contributor
timestamp: March 24, 2019, 12:26:37 pm
content: Quote from: mikeselectricstuff on March 24, 2019, 11:25:46 amI haven't. I don't have the appropriate cables, and I'm a little afraid of messing it up. I need this scope for work, I can't risk any down time right now.Mostly I just want to if this is similar to what other people with the same scope are seeing.

author: Bud
author_rank: Super Contributor
timestamp: March 24, 2019, 01:53:05 pm
content: DC offsets are typically taken care of by user self calibration.
Agilent E4406A enables 100MHz SPAN with CDMA2000 option - Page 1
Forum section: electronics / testgear

author: zxase258
author_rank: Contributor
timestamp: July 09, 2018, 04:56:37 pm
content: I have always thought that when the Agilent E4406A has the BAF (WCDMA) option, it can enable 100MHz SPAN (using the "intermod" mode in the WCDMA measurement function).But when I purchased the E4406A, none of the 40 stocks in the seller had BAF options. They are all used for GSM and CDMA measurements. My E4406A has a CDMA2000 measurement option. When I studied it, I found that the CDMA2000 measurement function also had intermodulation measurements, which worked the same way as the WCDMA option. This provides a bit of convenience for "wideband" measurements.

author: RCHRDM
author_rank: Regular Contributor
timestamp: March 23, 2019, 08:43:49 pm
content: HelloHave you successfully updated the firmware in your E4406A using the Agilent updater software? I am having problems with this.Richard
Softplot with Prologix interface revisited - Page 1
Forum section: electronics / testgear

author: PA5Y
author_rank: Newbie
timestamp: June 14, 2018, 12:38:05 pm
content: Hello I really hope that someone can help me with this, my 2nd attempt at finding a solution.In Aphena softplot I am unable to get my Prologix V6.0.0.1 USB to GPIB interface to work. It works perfectly well with the KE5FX GPIB tools. I have an E4406A, HP-8712 VNA and an HP-8562A, 7040.exe is able to get screen grabs from these instruments easily. I can get data from the E4406A in softplot using the LAN connection but not using GPIB.For instance should which of the following options should I choose:National Instruments or Computerboards GPIB CardHewlett Packard HPIB CardThenGPIB Card DLL Filename - no idea what this is and the documentation does not help at all, do I need to use VISA drivers?ThenGPIB Card Symbolic Name - GPIB0? How can I set this or determine what it is? Can I use the KE5FX GPIB configurator?The rest is obvious enough. Please help I would really like to get this working.RegardsConrad

author: PA5Y
author_rank: Newbie
timestamp: June 15, 2018, 09:02:52 am
content: Or should I set it up as serial device?Somebody must know :-)

author: valgamaa
author_rank: Contributor
timestamp: June 15, 2018, 12:54:52 pm
content: Why not contact Chris direct at this address?http://www.cambridgerf.com

author: RCHRDM
author_rank: Regular Contributor
timestamp: March 23, 2019, 08:44:45 pm
content: HelloHas anyone successfully updated the firmware in the E4406A using the Agilent updater software? I am having problems with this.Richard
ACV Calibrator - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: March 22, 2019, 01:28:30 am
content: I picked up a dcv calibrator a couple of years back and did not expect to use it as much as I have. Turns out to be really handy. Now I’m thinking of getting an ac voltage calibrator. Something to spot check the 34401A meters and for calibration of ac measurement circuits in general. I’m thinking of an older Fluke or Datron unit. Can anyone chime in on what to look for and what to stay away from? I will be watching eBay for a lab pull for under $1k

author: coromonadalix
author_rank: Super Contributor
timestamp: March 22, 2019, 10:37:45 am
content: find any model who has a service manual available ... my 2 centsIm restoring a fluke 343, still stuck with an overload when i select 1000v, but the service manual is a big help ..

author: Jester
author_rank: Frequent Contributor
timestamp: March 22, 2019, 11:51:03 am
content: One thing I’m curuios about is after a repair what type of equipment is required to calibrate the calibrator?

author: HalFET
author_rank: Frequent Contributor
timestamp: March 22, 2019, 11:52:35 am
content: Also, ask for a picture of the transformer if you buy a Fluke 5200A, it's prone to fatal rust-induced defects.

author: coromonadalix
author_rank: Super Contributor
timestamp: March 22, 2019, 09:07:11 pm
content: Quote from: Jester on March 22, 2019, 11:51:03 amFor an example in the fluke 343, you have to calibrate a 15.000 or 15.0000 volt reference, so i needed an 6.5 digit meter
UCE-DSO210 – 2 channel digital oscilloscope with xy-mode - Page 1
Forum section: electronics / testgear

author: DieterLaser
author_rank: Newbie
timestamp: April 02, 2019, 11:57:27 am
content: Hi!I'm trying to find a decent digital oscilloscope that has an okayish xy-mode. I know analogue is better for that but my place is small and I also travel a lot with my gear. I also know that I'm not the first one asking for suggestions for these specifications on here, but I wanted to mention the UCE-DSO210, because I couldn't find any info about it on this forum. Does anyone use one of these? I actually just want to use it to understand my modular synthesizer a bit better. xy-mode is good for visualising the sound/cv coming from chaos modules.I know the DSO 203 has a Firmwareupdate that offers xy-mode, but I can't find it anywhere and i also don't need 4 channels. also it seems a bit slowhere is a video of the UCE-DSO210 in xy-mode, which seems to be the best example i found so far for xy-mode on a digital oscilloscope. also its cheap, around 80 buckshttps://youtu.be/G4w3OJqbB90

author: DieterLaser
author_rank: Newbie
timestamp: April 02, 2019, 12:03:40 pm
content: here is more informationhttps://www.ucore-electronics.com/product/uce-dso210-oscilloscope/