hybridfree/eevblog-posts huggingface dataset:
RFL 912 Gaussmeter - Page 1
Forum section: electronics / testgear

author: branadic
author_rank: Super Contributor
timestamp: July 31, 2017, 12:50:55 pm
content: Hi to everyone out there,I'm searching for a complete manual for RFL 912 Gaussmeter. The only thing I found on the web is not complete.Also I'm interested, if someone replaced the original fragile probes by something more modern and more robust. Please share your knowledge to this gear in here. Thanks.-branadic-

author: branadic
author_rank: Super Contributor
timestamp: August 01, 2017, 04:02:48 pm
content: Noone out there with similar device and original users manual?-branadic-

author: HighVoltage
author_rank: Super Contributor
timestamp: August 01, 2017, 04:08:43 pm
content: What about this first hit on Googlehttp://web.mit.edu/8.13/8.13d/manuals/rfl-912-gaussmeter.pdfIs this the correct one?Who made this?How old is it?

author: branadic
author_rank: Super Contributor
timestamp: August 01, 2017, 04:42:59 pm
content: As I wrote, this one is incomplete-branadic-

author: jh15
author_rank: Frequent Contributor
timestamp: August 02, 2017, 05:40:57 am
content: Somewhere I have an anus meter I used to check audio tape head magnetism, but it was a D'arsonval movement.

author: Dr Bob
author_rank: Contributor
timestamp: January 31, 2018, 12:46:00 am
content: What information are you looking for?Hall effect probes come in a wide variety of styles and measurement ranges. If you need a very thin one for probing loudspeaker gaps, they are going to be fragile and need looking after. The thicker you can go, the better off you are for robustness.
Lecroy LC684 (DDA-125) screen brightness - Page 1
Forum section: electronics / testgear

author: johncprice
author_rank: Newbie
timestamp: January 30, 2018, 09:55:58 pm
content: I just got a Lecroy DDA-125 (same as LC684AXL, I believe) from Ebay in the US. It seems I got lucky and everything is working as expected. In my home lab it is replacing a Tek 7904, so this thing is quite an improvement! The only fault I can find with it is that the screen is not very bright. Does anyone know if there is a way to fix that? Maybe there is a backlight tube that can be replaced?

author: nctnico
author_rank: Super Contributor
timestamp: January 30, 2018, 10:04:45 pm
content: If it has an LCD screen you can try CFL replacements which use LEDs.https://www.ebay.com/itm/385mm-LED-Backlight-Strip-Kit-CCFL-LCD-Screen-to-LED-Monitor-DC-10-30V-D7W8-U5X7/182948771911?epid=20010951805You'll have to adjust the current through the LEDs though after cutting the strip to the right length. There are current sensing resistors on the board which are easy to identify.

author: johncprice
author_rank: Newbie
timestamp: January 30, 2018, 11:36:05 pm
content: Thanks for the reply. I just found a Youtube video showing a repair of a DDA-125 screen. It is a Sharp LQ10D367 10.4" TFT module, and new backlight assemblies for it are available for $15 on Ebay and Amazon. So I will give one of those a try.

author: eb4eqa
author_rank: Regular Contributor
timestamp: January 30, 2018, 11:40:22 pm
content: If you want tongo thru the trouble, installing a LED backlight is not difficult and will provide illumination.http://www.rbarrios.com/projects/LCD2LED/Roberto
CPU die test rig based on CPS 4090µ+ with cold/hot chucks, Celadon VersaCore? - Page 1
Forum section: electronics / testgear

author: eton975
author_rank: Newbie
timestamp: January 30, 2018, 03:09:07 pm
content: If anyone here (hell, even Dave himself or the CPS/Electroglas guys) have experience here, would be lovely. Lead time and cost estimates for such a rig with 240VAC input and climate control appreciated. Cleanroom reqs (ISO 3 good enough for probing a 14~28nm FinFET 200mm wafer?), oscilloscope and logging device/PC/server recommendations would be great too.
Advantest R3465 - Page 1
Forum section: electronics / testgear

author: tecman
author_rank: Frequent Contributor
timestamp: January 30, 2018, 05:40:37 pm
content: I picked up a nice working R3465 8 ghz spectrum analyzer on ebay. It suffered some front panel damage to the frame of the front panel, but otherwise seems fully functional. Passes POST and calibrated w/o errors. There seems to be a lack of any documentation on the web other than the user manual, which is somewhat typical of Advantest. My question is does anyone have any documentation on the R3464/5 analyzers ? Also if someone has dug into one of these, I would be curious about the location and type of battery used for (cal) data storage.paul

author: edpalmer42
author_rank: Super Contributor
timestamp: January 30, 2018, 06:13:53 pm
content: The battery is on the processor board on the top of the unit. It's in the right, rear corner. In mine, it was a Maxell ER3, 1/2 AA, 3V6, 1.1 AH.I have a copy of the service manual, but it's totally worthless. No schematic, parts list, or circuit descriptions. Utterly worthless.Ed

author: tecman
author_rank: Frequent Contributor
timestamp: January 30, 2018, 06:52:56 pm
content: Did you replace yours ?On my other equipment having a schematic is very helpful when replacing the battery. I usually connect a spare battery through a diode to the board after the internal diode from the unit's battery. This preserves the data. I will have to try to trace out a bit to see if I can find the isolation diode on the board.I am not surprised to hear that the "service" manual was a bust. Somebody, somewhere must have some schematics on the Advantest stuff.paul

author: edpalmer42
author_rank: Super Contributor
timestamp: January 30, 2018, 08:16:50 pm
content: My battery was stone dead so I didn't have to jump through any hoops to replace it. I installed a BR2325 coin cell simply because I've got a bunch. It looks ugly, but it works.One thing I noticed is that the voltage dropped in the first month from 3V3 to 2V9 and then basically sat there. I don't know if that was due to the battery or the load. My testing showed that at 2V9, the circuit draws ~3 ua. so, at 3V6, you could be looking at a 5 ua drain which sounds nuts to me, but whatever. After 4 yrs, the voltage is 2V870 and the clock is on time.I don't know if there's supposed to be any high-band calibration data in there or not. If the R3465 has any kind of service menu, I haven't found it. Of course, the lack-of-service manual didn't mention anything. The autocal only works on the low band.Usually in a situation like this, you replace the battery while the unit is running. Be sure to use anUNgrounded soldering iron.Ed
Oscilloscope probe readout pin fail - Page 1
Forum section: electronics / testgear

author: Paul Moir
author_rank: Frequent Contributor
timestamp: January 29, 2018, 03:22:25 am
content: I went to remove the probe from my oscilloscope only to find that I couldn't. Surely this problem has affected more than just me?Anyway, forewarned is forearmed!

author: Gyro
author_rank: Super Contributor
timestamp: January 29, 2018, 04:10:02 pm
content: Haha, that's a very old problem! We used to have issues with that donkeys' years ago in our lab...People would swap Tek X10 probes onto HP1741A scopes - those had external nuts on the BNC connectors and the pin would get caught. There were an awful lot of scratched up connectors (sometimes front panels too!) and bent or snipped pins in the probe connectors. Our calibration department used to moan like crazy - that and blown 50R internal terminators!It was actually a pretty good way of not getting your probes stolen, potential villains would often give up and go off in search of an easier target!
Yokogawa DL1540 Communication Interface User’s Manual - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: December 20, 2017, 04:18:11 pm
content: Evnin' (o;Has anyone stumbled upon the Yokogawa DL1540 communication interface users manual?Especially I am interested of course in the GPIB commands (o;Nothing on the net to be found..just the plain user manual...but not the comm manual with number IM701510-11E.thanks in advance

author: JFJ
author_rank: Regular Contributor
timestamp: December 20, 2017, 05:38:38 pm
content: A communication manual for the DL1540C/1540CL is available from here:http://labit501.upct.es/~fburrull/docencia/FundamentosTelematica/OsciloscopioDL1520/IM701530-11E_010%20Communication%20Interface%20Manual.pdfThe GPIB commands may be sufficiently similar to those in the DL1540 communications manual to be of some use.

author: davorin
author_rank: Unknown
timestamp: December 21, 2017, 01:51:33 pm
content: Seems to be identical..thanks (o;Just wonder why all scopes I know don't have a GPIB command to put it back into local mode (o;A quick test gets me a TIFF capture:Code:<?php$string="";$u=ibfind("1540");ibwrt($u,"IMAG:FORMAT TIFF");ibwrt($u,"IMAG:SEND?");$r=ibrd($u,$string,100000);$string=substr($string,8, -1);file_put_contents("/var/www/html/image.tif",$string);;?>

author: davorin
author_rank: Unknown
timestamp: December 21, 2017, 02:04:54 pm
content: And with this little addition:Code:<?php$image="";$u=ibfind("1540");ibwrt($u,"IMAG:FORMAT TIFF");ibwrt($u,"IMAG:SEND?");$r=ibrd($u,$image,100000);$image=substr($image,8, -1);$imagick= newImagick();$imagick->readImageBlob($image);$imagick->setImageDepth(24);$imagick->setImageFormat("png");$clut= newImagick();$clut->newPseudoImage(2,1,"gradient:orange-black");$imagick->clutImage($clut);header("Content-Type: image/png");echo$imagick;?>It is shown in a browser like:

author: dl1640
author_rank: Regular Contributor
timestamp: January 28, 2018, 04:57:21 pm
content: should be identical in commands..C is for color display and L is for longer memory..to switch to local mode maybe use ":COMM:REMOTE OFF", not sure.

author: davorin
author_rank: Unknown
timestamp: January 29, 2018, 01:32:17 pm
content: Well..it is actually simple...as "go to local mode" has nothing to do with a command, but with the GPIB bus itself...In PHP that would be then a simple:Code:ibloc($u);
Paperwork porn!  A 40 year old scope manual - Page 1
Forum section: electronics / testgear

author: jewelie
author_rank: Regular Contributor
timestamp: January 29, 2018, 01:15:40 am
content: When I got hold of an old CRT scope last year, I couldn't help but be dazzled by the 40 year old manual that came with it. It's nearly as old as me (but in FAR better condition!) The theory of operation description is fab, as are the mint circuit diagrams. It's practically an electronics textbook and tutorial in itself.See the attached photos...Julie

author: xrunner
author_rank: Super Contributor
timestamp: January 29, 2018, 01:23:24 am
content: Yea cool. Back then they actually were proud to explain the entire theory of operation.

author: David Hess
author_rank: Super Contributor
timestamp: January 29, 2018, 03:23:23 am
content: For Tektronix, complete service documentation was withheld starting at about 1990.

author: BravoV
author_rank: Super Contributor
timestamp: January 29, 2018, 03:37:00 am
content: From my Tek P6046 Differential probe ..

author: abraxa
author_rank: Frequent Contributor
timestamp: January 29, 2018, 08:42:11 am
content: Damn... completely hand-drawn, yet well laid-out and so very sharp... what craftmanship and skill!
Quick question about DMM - Page 1
Forum section: electronics / testgear

author: LeonR
author_rank: Regular Contributor
timestamp: February 01, 2018, 09:12:05 pm
content: Hiya. So, I've bought a cheap DMM for some tinkering with electronics from ali (an Aneng 8009). But there's one thing bothering me: When on some scales, the DMM shows values even with no loads (or even probes!) attached to it. I've made a small video showing it.(there's some people talking on the background, just ignore it)It's been more than a decade since I've last had one in my hands, and I don't remember if it is normal or if I have a defective one. Any help would be appreciated.

author: Fungus
author_rank: Super Contributor
timestamp: February 01, 2018, 09:15:20 pm
content: Millivolts with no leads attached is normal, nothing to worry about. It's capacitance in the environment, you can influence the numbers by waving your hands near the meter.To get rid of it: Attach the leads and short them together.

author: rsjsouza
author_rank: Super Contributor
timestamp: February 01, 2018, 09:17:41 pm
content: Totally normal, especially in the mV range. The higher sensitivity is actually picking up noise from the environment.The temperature range is fine as well - it is measuring the ambient temperature.Nada que seja preocupante. Use o bichinho sem neuras.

author: LeonR
author_rank: Regular Contributor
timestamp: February 01, 2018, 10:02:07 pm
content: Quote from: Fungus on February 01, 2018, 09:15:20 pmThat's good to know! I've tried shorting the leads, but as soon as I disconnect them, the reading would start again.Thanks!Quote from: rsjsouza on February 01, 2018, 09:17:41 pmThanks! I was worried about the voltage readings, since I didn't remember if it was normal on the mV scale.

author: Fungus
author_rank: Super Contributor
timestamp: February 02, 2018, 09:15:47 am
content: Quote from: LeonR on February 01, 2018, 10:02:07 pmOf course - the environment didn't go away!nb. They're connected when you're measuring things, that's all that matters.
Precision Gold N56FU (EM6000) Multimeter Failure on Ohms/Diod/Continuity/mV - Page 1
Forum section: electronics / testgear

author: mpmansell
author_rank: Newbie
timestamp: January 28, 2018, 05:08:33 pm
content: Hi there.I have a Precision Gold N56FU meter which I bought from Maplin in the UK about 10 years ago. It hasn't been so heavily used, but has been a decent meter for use with my home projects.Just today I took it out to check some resistances and match a few transistors and discovered that it had failed on the Ohms/Diode/continuity and mV ranges. On mV it beeps constantly, although not entirely regularly and sometimes shows a reading, even though there is noting under test and the test probes open. If left long enough, it sometimes stops the beeping and shows -ve symbol and starts counting down from approx 600 (as I type it is -523.0 and still counting down).On Ohms/Diode/Continuity, it shows none of the expected symbols with a reading of -0L and the 'C' from temperature measurement showing. presisng range does nothing (short, long and very long) and the only thing select does is toggle bweteen 'c' and 'f'.As far as I can tell without any other equipment available currently, the other ranges appear functional (although I have no way of telling if the readings are barking mad, or good)I have tried 2 fresh batteries and they, as well as the originally installed battery, read in excess of 9V.I have opened the unit and checked/cleaned connections. There are no other apparent faults but I will look again, more closely when I have access to more test gear again.Any ideas ?Thanks

author: retiredcaps
author_rank: Super Contributor
timestamp: January 28, 2018, 06:48:05 pm
content: Quote from: mpmansell on January 28, 2018, 05:08:33 pmLook at the main IC datasheet for the above. Many of these meters seems to follow the schematic in the datasheet.Check the range switch/contacts for debris or oxidiation?

author: mpmansell
author_rank: Newbie
timestamp: January 28, 2018, 11:40:39 pm
content: Thanks. I checked all those prior to posting but am a little limited until I can find another meter to race things through with. A visual inspection showed nothing obvious so will have to trace things a little more closely once I get hold of another meter
Testing Tek 7854 - Page 1
Forum section: electronics / testgear

author: tkamiya
author_rank: Super Contributor
timestamp: January 28, 2018, 04:39:56 pm
content: I was recently given Tektronix 7854 mainframe and two 7A26 plugins. I don't have any timebase.Before I invest in any more money, are there any way to run tests on these? Manual mentions self-diagnostic but requires timebase. Can mainframe itself be tested by itself??Thank you.

author: chris_leyson
author_rank: Super Contributor
timestamp: January 28, 2018, 04:47:55 pm
content: Should pass self test on power up without needing a horizontal plugin. You could plug one 7A26 into a horizontal slot and use it in XY mode.
reverse engineering DOS hardware interfaces - Page 1
Forum section: electronics / testgear

author: fisafisa
author_rank: Regular Contributor
timestamp: January 28, 2018, 05:11:46 pm
content: Hi.I am trying to get some more flexibility out of a pair of CRTUs.I know the ISA address space and ports used by the software to communicate to the hardware.Anybody knows of a software package that allows to intercept and possibly record the IO operations.could be a dos software or alternatively a windows one that let me run the dos app in a sort of VM.Failing that, the only solution I see is that to use a logic analyser to record the bus traffic.Additionally, anybody knows what are the scsi like interfaces in the R&S CRTU and PU units.They are meant to interconnect these devices but I do not understand the use case.Regards
Help for firmware  of tektronix TDS2012B - Page 1
Forum section: electronics / testgear

author: pasta2018
author_rank: Regular Contributor
timestamp: January 28, 2018, 06:14:22 am
content: Can anybody share the firmware of tektronix TDS2012B?The firmware version I need isV21.20 or earlier.Now I know that the tds1000B and tds2000B is the same firmware.would anybody help please. Very appreciate!

author: Jeroen_Bezemer
author_rank: Contributor
timestamp: January 28, 2018, 09:47:38 am
content: Quote from: pasta2018 on January 28, 2018, 06:14:22 amI might have it somwhere at work, i'll be there tomorrow again, and i will check.Verstuurd vanaf mijn SHIELD Tablet K1 met Tapatalk

author: pasta2018
author_rank: Regular Contributor
timestamp: January 28, 2018, 03:19:48 pm
content: Thanks,glad to hear that. Looking forward to your good news.
Correct GPIB-Commands to control a Keithley 705 Scanner-Mainframe? - Page 1
Forum section: electronics / testgear

author: Echo88
author_rank: Frequent Contributor
timestamp: January 28, 2018, 12:24:56 am
content: Seems im too dumb or blind to find the correct GPIB-commands to simply activate/deactivate channels of an arbitrary relay-card (i have a Keithley 7059-card plugged in, which are just 10 relays). Maybe someone can help me out with a working example?Keithley 705 Manual:https://doc.xdevs.com/doc/Keithley/705/705_901_01F.pdfThanks.

author: alm
author_rank: Super Contributor
timestamp: January 28, 2018, 09:58:48 am
content: I haven't used that unit, but it from reading the manual, something like C002 X should close channel 2. Depending on the type of card, you may need to open the previous channel manually unless you use the built-in step / scan feature. X stands for execute the previous commands in many Keithley instruments from this era.

author: Echo88
author_rank: Frequent Contributor
timestamp: January 28, 2018, 11:37:35 am
content: Thanks! "C002X" or "C002 X" did indeed work. After a little manual-reading ive also seen that "N002X" is the correct command to open the channel.I was just confused at first that "C002" wouldnt work and didnt see that the "X"-suffix was needed to execute the command.On page 49 of the manual is a fitting program example which i didnt see at first.
DP832 faulty or not? - Page 1
Forum section: electronics / testgear

author: buvikingen
author_rank: Contributor
timestamp: January 27, 2018, 10:00:33 am
content: Hello EEVblogThis is my first postI have just got a brand new DP832 for my lab, and I began testing it. I can see that channel 1 and 3 is spot on within spec, however channel two is off by approximating 7-10mV. My big consern is that when all outputs is turned off, I can see that on channel two there is 7mV on the out put and running 143uA. I do not know if this i normal or I got a faulty unit?Looking forward to hear from you guys/girls, and please say if you need more informationKind RegardsEmil

author: JDubU
author_rank: Frequent Contributor
timestamp: January 28, 2018, 01:05:27 am
content: Mine had similar offsets. Technically within published specs but a little bit annoying.I adjusted them out using my new 9999 count $22 AN8009.Rigol calibration document attached below.
scope aquisition modes - Page 1
Forum section: electronics / testgear

author: Dan Moos
author_rank: Frequent Contributor
timestamp: January 27, 2018, 02:33:42 am
content: I have a 1054z (fully hacked)I have never full understood what high res mode is actually doing. I have a digital signal that, in normal and peak mode, shows significant noise on both HIGH and LOW levels.High res mode basically makes all go away. We're talking 1 volt P to P of noise, with spikes even higher than that.I took a look with my analog scope (tektronix 2213), and I can't see the noise.I tend to think Normal and Peak modes are telling me the true story, and that High res is hiding the truth from me. I wuld have thought the noise would at least appear on my analog scope though.Thoughts?

author: bson
author_rank: Unknown
timestamp: January 27, 2018, 08:11:46 am
content: Hi res acquisition applies a boxcar filter to groups of samples.So if you want say 100MS/s it will run at its max of 1GS/s (?), and average 10 together for a single acquisition sample.

author: David Hess
author_rank: Super Contributor
timestamp: January 27, 2018, 06:26:01 pm
content: What you are seeing is normal although maybe it should not be. Despite having an index graded display, the Rigol is *not* producing an output comparable to the response of a CRT display simply because that would require either more processing power or a slower display rate. That is why the normal acquisition mode looks so similar to the peak detect acquisition mode. They should look significantly different and they even do look different on my old DSOs that lack index grading. (1)The analog display of your 2213 produces an accurate graded display of the noise. It is so accurate, that tangential noise measurement is possible which is something I have never seen any DSO do correctly however DSOs do not need to because they can make RMS noise measurements directly ... unless they are made by Rigol. Somehow Rigol screwed up even that.I have given some thought to this in the past and what I would prefer is a DSO display which duplicates the response of an analog display but overlays the peak detected envelope as an outside boundary. I know exactly how this could be done but nobody makes such an instrument.(1) With one exception. The old Tektronix 2232 has an optional low noise peak detect mode which produces a display identical to the normal sample mode when no signal is present. If any DSO did this without documenting it, I would consider it deceptive but Tektronix documented it and made it optional. It is very handy for documentation purposes. Below are two examples of this which lead to contemplating exactly what Tektronix did to produce this.
AFG3021 self calibration error - Page 1
Forum section: electronics / testgear

author: analogRF
author_rank: Super Contributor
timestamp: January 26, 2018, 04:29:36 pm
content: I recently bought a used AFG3021 (fairly cheap I guess at $325 delivered). It seems to work fine and I cannot find anything wrong with its output waveform but when I do the self CAL it gives error 1103,0 (CH1 Output offset calibration failure) all other tests pass OK.Anyone has experience with these units? Where should I start troubleshooting for this error? I thought it must be a DAC or Vref (related to the DAC) which is in the self calibration path. I see a PCM56PU on the board and that seems to be the only DAC. Is that it? But if it is faulty I should be getting more errors because it must be responsible for more parameters than just offset, no?How serious is this error? because when operating the unit I cannot really detect anything wrong with it.The firmware version is 1.04 Sept 2005. Can I upgrade the firmware from the file that exists on the TeK website?your help is greatly appreciatedthanks

author: analogRF
author_rank: Super Contributor
timestamp: January 27, 2018, 03:41:13 pm
content: this topic is closed for now as I have accidentally killed the signal generator. please see the following posthttps://www.eevblog.com/forum/testgear/tektronix-afg3021-died-firmware-update-gone-horribly-wrong-(/i have also posted on tektronix support forumany help is appreciated
Intelegent panel meter from EBAY - NEED OPINIONS - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: January 24, 2018, 03:01:34 pm
content: I rehouse now my isolation transformer and variac in new enclosureIt is 0-440V up to 4A deviceNow I`m looking for some sort of indication (V and A)Is it will be ok? (is it possible to mod it for work below 220V (via separate PS)?)It will be better replace current transformer to simple shunt but I can`t find this variant at EBAYAnd what about this?

author: alm
author_rank: Super Contributor
timestamp: January 27, 2018, 08:57:23 am
content: The advantage of a current transformer is that it isolates the meter from the live voltage, so no low-impedance connection needs to exist between the 440 V wires and the meter. I would say the meter in the second picture looks not at all suitable for 440 V. The exposed shunt, flimsy wiring and limited clearance would limit it to something like 50 V at best, in my opinion, even with an external voltage divider. Never mind that it is likely limited to measuring DC only, so you would need to add rectification and loose information about reactive power / power factor.
$50 milliohm meter review - Page 1
Forum section: electronics / testgear

author: joeqsmith
author_rank: Super Contributor
timestamp: January 27, 2018, 02:21:10 am
content: Scott finally released this video on a milliohm meter he had found. Inexpensive and appears to actually work.https://youtu.be/iIz-v9kfwIM
CRTU: R&S Apps for Windows 2000 mode - Page 1
Forum section: electronics / testgear

author: Bicurico
author_rank: Super Contributor
timestamp: February 03, 2017, 04:45:10 pm
content: Hi,I am still playing with the CRTU I received (Thanks!).The Windows 2000 partition only contains:- Windows 2000 default installation with custom boot screen- NI GPIO software- Adobe Acrobat Reader- Visual Studio / C++On many of the screenshots I have seen on the web, most have lots of Icons/Shortcuts of different tools and apps for testing.What are those?Are they official from R&S or custom developments?Is my CRTU missing software?Thanks,Vitor

author: Bicurico
author_rank: Super Contributor
timestamp: January 21, 2018, 01:33:22 pm
content: Pushing this up...Any kind soul, please?All it takes is to boot into Windows 2000, copy the folder containing the software to a USB flash drive and send it to me via WeTransfer.Thanks,Vitor

author: fisafisa
author_rank: Regular Contributor
timestamp: January 24, 2018, 10:53:00 pm
content: The root of mine contains the following:program filesOPSWtempStdImageConfigsCONFIGTedTempRohde-SchwarzCustomer InstallablesDocuments and SettingsswdisThere are no application you can use for general purpose.Only toolkit to build test apps.

author: Bicurico
author_rank: Super Contributor
timestamp: January 25, 2018, 08:40:13 am
content: Hi,Thank you for the reply!Would you be willing to copy & zip these foldes and send them to me through WeTransfer:program filesOPSWStdImageConfigsCONFIGTedTempRohde-SchwarzCustomer InstallablesswdisThat would be awesome!I have a folder called BASE that mainly contains th Windows drivers. I can share that with you.Regards,Vitor

author: fisafisa
author_rank: Regular Contributor
timestamp: January 25, 2018, 10:11:33 pm
content: I will prepare a backup ...

author: Bicurico
author_rank: Super Contributor
timestamp: January 25, 2018, 10:15:23 pm
content: Muchas gracias!Un saludo,Vitor

author: fisafisa
author_rank: Regular Contributor
timestamp: January 26, 2018, 10:33:04 pm
content: HiI do not know how to use wetransfer.What information do I need to send to you?
Opinion wanted:  Best HP ovenized osc - (choose from 3) - Page 1
Forum section: electronics / testgear

author: 4thDoctorWhoFan
author_rank: Regular Contributor
timestamp: January 26, 2018, 05:12:23 pm
content: I have three HP ovenized 10Mhz crystal oscillators to choose from for a little project. These are all pulls from HP equipment.Which of the three listed below would you choose & why? Which has the best overall specs? I really have not kept up with crystal osc to know which is the better product.1)HP#: 0950-0411KSS Japan - 19882)HP#: 0950-0411McCoy ElectronicsModel: osc92-38B3)HP#: 0960-0465Nihon Dempa Kogyo - Japan - 1991Model: ENA3003A

author: Tony_G
author_rank: Super Contributor
timestamp: January 26, 2018, 05:57:30 pm
content: Part number 0950-0411 was used in the 8657A/B (and others) but I have an 8657B Option 001 - I'm not sure who made mine but it should be reasonable to assume that whatever supplier HP used they were hitting the described specifications.The details on this are:Aging Rate - 1.5x10-8/day (after 10 days warm-up) & 1.0x10-9/day (after 180 days warm-up)Temp - 7x10-9Line - 2x10-9 (+5%, -10%)For part number 0960-0465 - This is used in the 3325B - I also have this but I don't have option 001 (generally called the High Stability Timebase across HP gear). The specs on this one are:Aging Rate - +/- 5x10-8/week (after 72 hours warm-up) & +/- 1x10-7/month (after 15 days warm-up)Temp - N/ALine - N/AI think lacking the Temp & Line for 0960-0465 isn't a big issue as the Option 001 for the 8657B is the better OCXO.Apparently I didn't do any videos on my 8657B or 3325B - I will have to rectify that.

author: 4thDoctorWhoFan
author_rank: Regular Contributor
timestamp: January 26, 2018, 06:09:53 pm
content: Thanks TonyG, that was very informative.I will go with the 0411.I will probably post the two I am not going to use in the for sale section if anybody is interested. Probably in a few weeks.

author: edpalmer42
author_rank: Super Contributor
timestamp: January 26, 2018, 07:44:54 pm
content: Before you get rid of any of them, you might want to test them. Regardless of the specs, high quality oscillators are very unique in their characteristics. Some are much better than spec. Their performance will also depend on how well they've aged and how well they've been treated.If phase noise is important in your application, that's a quick test if you have the right equipment. Phase noise would be important if you took the oscillator's output and multiplied it up to a high frequency, e.g. GHz.Aging is a longer test, of course, not just because of the numbers involved, but also due to the time it takes for the oscillator to settle down. Note that TonyG's data talks about 10 or 15 days warmup.Ed
Komerci PS2002H - Anyone tried or tested one of these? - Page 1
Forum section: electronics / testgear

author: McBryce
author_rank: Super Contributor
timestamp: January 29, 2018, 09:39:10 am
content: A portable powersupply? Anyone tried it?McBryce.Komerci PS2002Hhttp://komerci.de/shop/bild_gross.php?img=labornetzteil_ps2002-h.jpg&products_id=945&osCsid=3b8060149255a3e9d1242a26ca59620c

author: Pinkus
author_rank: Frequent Contributor
timestamp: January 29, 2018, 10:12:41 am
content: I did quite some time ago and sent it back quickly.As far as I remember it had a quite high noise / peaks. I did not feel secure using it on my electronics (though I do have reliable 'real' desktop power supplies).Look also the reviews here:https://www.eevblog.com/forum/testgear/tekpower-tp3016m-handheld-power-suppy/https://www.ebay.com/itm/292224923696

author: McBryce
author_rank: Super Contributor
timestamp: January 29, 2018, 10:43:15 am
content: Ah, thanks for the review. I couldn't find anything on the Forum with the name / number that I had.I also have a reliable bench supply (Rigol DP832), but I thought this might be useful for testing/repairing things on-site.McBryce.
Is the UT-61E still the best budget DMM with USB connection? - Page 1
Forum section: electronics / testgear

author: gstorto
author_rank: Contributor
timestamp: January 25, 2018, 12:14:16 am
content: I have been considering adding a second DMM to my current UT-61E one. I need to log the voltage and current (old + new DMM) at the same time and transfer it to my PC.There was a thread in 2013 about the same subject:https://www.eevblog.com/forum/testgear/choosing-a-usb-dmm-and-software/Many users recommended the UT-61E, is it still the king for a budget DMM w/ USB?I have checked some rivals, such as the Mastech 82xx series, but their availability seems scarce and the counts are lower.Flukes 287/289 are at least 10x more expensive and I don't think I will use their features to be worth the price. Other Fluke USB models seem to have been discontinued...

author: Nusa
author_rank: Super Contributor
timestamp: January 25, 2018, 12:57:59 am
content: I don't know that anything qualifies as King, but the UT61E has a decent price/feature ratio. My UT61E came with a serial cable and I had to get my own serial-->USB adapter. Maybe it's packaged different now.There are a lot more Serial/USB enabled meters now than there were when the 2013 thread happened. If you don't need high counts or micro ranges for voltage and/or current, you may be able to find the feature cheap. I've seen meters as low as $12 with that feature. Can't recommend anything specific, sorry.

author: joeqsmith
author_rank: Super Contributor
timestamp: January 25, 2018, 01:13:35 am
content: If you are happy with the UT61E, I can't see any reason you wouldn't just get a second one.

author: cellularmitosis
author_rank: Unknown
timestamp: January 25, 2018, 06:50:19 am
content: The digitek meter is a bit cheaper, but is only 3.5 digit.https://youtu.be/7pbRLom7bNc

author: gstorto
author_rank: Contributor
timestamp: January 26, 2018, 12:17:11 am
content: Quote from: Nusa on January 25, 2018, 12:57:59 amNo, unfortunately it still comes with the RS232 serial port. I am buying a UT-D04 to have the USB one, it is only 8EUR.I tried to look into cheaper ones, but the majority has its own software and no alternative to get a direct USB connection.Quote from: joeqsmith on January 25, 2018, 01:13:35 amYeah, I think I have reached the same conclusion.Quote from: cellularmitosis on January 25, 2018, 06:50:19 amThanks for the tip. It seems a good alternative and is supported by Sigrok (Linux library for DMM). I will think about it.
B&K Precision 891 - 300kHz Bench LCR Meter Photos - Page 1
Forum section: electronics / testgear

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 23, 2018, 06:49:11 pm
content: For those interested, I took a look inside B&K Model 891 300kHz Bench LCR Meter today.Main ADC isADS8556, running intoTMS320F28035(C2000 microcontroller).

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 23, 2018, 06:51:48 pm
content: More photos (1/3)

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 23, 2018, 06:53:19 pm
content: More photos (2/3)

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 23, 2018, 06:56:29 pm
content: More photos (3/3)

author: Kean
author_rank: Unknown
timestamp: January 24, 2018, 01:31:50 am
content: Interesting that they used a TMS320 main mcu, when the display and GPIB/Ethernet boards use STM32F20x.Hang over from an earlier design, or making use of some special features of the C2000?

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 25, 2018, 06:47:51 pm
content: Does anyone more familiar with Impedance Analyzers care to compare the B&K 891 specifications to classic HP 4192A?
MiniVNA Tiny capabilities - Tx power measurements? - Page 1
Forum section: electronics / testgear

author: sensors
author_rank: Newbie
timestamp: January 23, 2018, 08:23:29 am
content: Hi,I'm looking at getting a miniVNA tiny to perform some measurements on a 868MHz antenna design, but in future I'd also like to use it for 2.4GHz designs too.It seems from the documentation that it can be used to do antenna matching and tuning, so that's one of my boxes ticked. What it doesn't say, and what I'd really like to know is if it can also measure TX power and frequency output from my transmitting device.Does anyone know if these measurements are possible with this tool?Thanks

author: borjam
author_rank: Unknown
timestamp: January 23, 2018, 10:46:06 am
content: Quote from: sensors on January 23, 2018, 08:23:29 amNot with the current software at least. I don't know about potentially unused features of the hardware, though.It's not a spectrum analyzer, nor a power meter.

author: sensors
author_rank: Newbie
timestamp: January 23, 2018, 05:01:31 pm
content: Any idea if there are devices that will do this, for similar cost?
NEW DTM0660L based DMM? NKTECH NK-51G/H - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: January 24, 2018, 09:39:36 am
content: Any opinions?Looks similar to

author: Hydrawerk
author_rank: Super Contributor
timestamp: January 24, 2018, 10:07:24 pm
content: What input fuses does it have??

author: 001
author_rank: Super Contributor
timestamp: January 24, 2018, 11:47:53 pm
content: Quote from: Hydrawerk on January 24, 2018, 10:07:24 pmFuses looks good
What is the smallest ampmeter you built? - Page 1
Forum section: electronics / testgear

author: ez24
author_rank: Super Contributor
timestamp: January 22, 2018, 07:00:08 am
content: I am trying to come up with the smallest amp meter I can using 3 digit mini LED meters from Aliexpress. I will probably use a 25 watt 0.1 ohm resistor as a shunt because the shunts on Aliexpress are too big. A 3 digit meter is just fine for me.I ordered some different mini voltmeters. From a 2 wire voltmeter, 3 wire black magic (I do not understand how they work), 4 wire that makes sense (volts and current are separate). They are all about 1 - 1 1/2 square inches. By the time I attach the shunt and terminals it will get 2-3 sq inches.Anyone come up with an amp meter (say 5-20 amps max) that is smaller than 3 sq inches (on the panel). I have 1.5 inches depth.My biggest power supplies (12 v 4a and 9 v 3a ) are 3x4 each = 24 total square inches. I have a 12x16 inch working area = 192 sq in. So far I plan 5 power supplies, 4 amp meters, 2 function generators, and 2-3 oscilloscopes (and maybe a multimeter). Space is getting tight.This is for a briefcase electronics lab. Everything is going inside the lid of the briefcase (Samsonite).Some meters I bought:https://www.aliexpress.com/item/1pcs-Mini-0-28-inch-0-28-3-bits-DC-0-100v-Digital-Red-LED-Display/32829464634.htmlhttps://www.aliexpress.com/item/Mini-0-36-inch-Digital-Voltage-Tester-Voltmeter-DC-0-100V-Volt-Meter-3-0-30V/32845665368.html?https://www.aliexpress.com/item/New-DC-0-5-A-Direct-Current-0-36-LED-Digital-Display-Ammeter-Panel-Electrical-Current/32827654076.htmlhttps://www.aliexpress.com/item/4-30V-0-10A-0-36-DC-Digital-Current-Meter-ammeter-Accuracy-Class-0-1/32833346031.htmlThanks

author: JDubU
author_rank: Frequent Contributor
timestamp: January 23, 2018, 02:06:49 am
content: Banggood has several lcd and oled display meters that you might find interesting.For example:https://www.banggood.com/100V-50A100A-7in1-OLED-Multifunction-Tester-Voltage-Current-Time-Capacity-Voltmeter-Ammeter-p-1120290.html?rmmds=detail-left-hotproducts__2&cur_warehouse=CNhttps://www.banggood.com/100V-15A-Digital-DC-Voltmeter-Ammeter-Current-Voltage-Meter-LCD-Energy-Tester-p-1170132.html?rmmds=detail-left-hotproducts__4&cur_warehouse=CN

author: ez24
author_rank: Super Contributor
timestamp: January 23, 2018, 02:30:35 am
content: Quote from: JDubU on January 23, 2018, 02:06:49 amThanks I have several of these - they are too big By the time I hook up wires and a switch they get really big
Instek GDS-2072E front end cal - Page 1
Forum section: electronics / testgear

author: rhb
author_rank: Super Contributor
timestamp: January 23, 2018, 03:41:32 am
content: Does anyone know anything about the two trim caps in the front end? There's one accessible through a round hole and another through an oval hole for each channel.Ive got a new GDS-2072E which *almost* meets a 150 MHz BW spec out of the box referenced against one of Leo Bodnar's 40 pS rise time pulse generators. Having done analog scope calibrations using a Tek 106, this raises the question of whether the step response can be improved. A slight mismatch of the pulse generator significantly improves the step response.Does anyone know anything about the trimmers? Just a block diagram would be helpful. But IIRC, there is a particular sequence in which one is supposed to adjust the trimmers in the front end of a Tek 465.I realize that even Tek and Keysight no longer provide the level of instrument documentation they used to, but it would be nice to know how to do a basic front end calibration adjustment. Especially since i also have an MSO-2204EA.

author: nctnico
author_rank: Super Contributor
timestamp: January 23, 2018, 09:39:35 am
content: These trimmers are most likely to adjust the low frequency response (there is little other reason to put a trimmer in a modern oscilloscope frontend). In the end there is only so much you can do to get a fast pulse into a very capacitive 1M Ohm input.
SDG2000X 10 MHz output - Page 1
Forum section: electronics / testgear

author: mojoe
author_rank: Frequent Contributor
timestamp: January 20, 2018, 01:22:13 am
content: Can anyone tell me what the output level is for the internal reference to the rear BNC? It isn't listed in the user or service manuals. I'd measure it, but my service monitor is packed away at the moment.Thanks.

author: tautech
author_rank: Super Contributor
timestamp: January 20, 2018, 01:29:02 am
content: It's listed in the datasheet as typically 3.3V p-p into a HiZ load.Output impedance listed as 50 ohm

author: pigrew
author_rank: Frequent Contributor
timestamp: January 23, 2018, 02:57:09 am
content: My unit produces 3.3Vpk-pk into a 1Mohm oscilloscope input. It is fairly band-limited. It's common-mode is 0 V, so I'm guessing that the output is AC coupled (though I didn't confirm that).With a 50-ohm termination, the amplitude is about half, so it does seem to be a 50-ohm output.
GP Industrial Electronics XP640 EPROM Programmer - Page 1
Forum section: electronics / testgear

author: adegough
author_rank: Newbie
timestamp: January 22, 2018, 11:59:14 pm
content: Hello all!This post is a request for information on The GP Industrial Electronics XP640 EPROM Programmer. This device was manufactured in the mid 1980's and a few still exist (I have one, hence this post). The machine had a few attachments to allow it to program EPROMs larger than 28 pins and also to act as an EPROM Emulator.The additional attachments were the XU620, with various pods for different devices and microprocessors of the era. The EPROM Emulator was designated the XM512.I located a review of the XP640 and XM512 in the July 1985 issue of Electronics Today International (Australia).I would be interested in finding more information about this machine and whether anyone has examples of the programmer or attachments. I am willing to purchase any items related to this device (at a reasonable price + shipping).Documentation would be very useful. Please see Matthieu Benoit's website for further info.Regards to all.Ade
SENCORE LC102 - service manual and/or calibration instructions needed - Page 1
Forum section: electronics / testgear

author: Rosebud41
author_rank: Newbie
timestamp: July 07, 2015, 04:22:27 am
content: Hello,I don't see these PDF's floating around the internet....however, does anyone have a scanned/PDF version available ?Let me know...thanks.SG.

author: miguelvp
author_rank: Super Contributor
timestamp: July 07, 2015, 04:41:25 am
content: I don't think this has the calibration procedure but has all the rest:http://bama.edebris.com/manuals/sencore/lc102/

author: Sencoretech
author_rank: Contributor
timestamp: October 20, 2015, 08:53:38 pm
content: Late but it's your lucky day, here is the cal procedure

author: commongrounder
author_rank: Frequent Contributor
timestamp: October 21, 2015, 01:52:11 pm
content: LC102 owners (myself included) thank you very much!

author: Sencoretech
author_rank: Contributor
timestamp: October 21, 2015, 05:44:45 pm
content: Quote from: commongrounder on October 21, 2015, 01:52:11 pmNo problem, there is a homemade switch box this cal refers to, but at least it gives you most of what you'd need.

author: mwb928
author_rank: Newbie
timestamp: January 22, 2018, 06:53:47 pm
content: Hi Sencoretech,Thanks for sharing the LC102 calibration procedure online. However, I found out the procedures are missing R200 and R227 adjustment information. Could you please update the information?Thanks

author: mwb928
author_rank: Newbie
timestamp: January 22, 2018, 07:00:48 pm
content: R200, and R227 locations.
LCR T5 Multifunction tester calibration - Page 1
Forum section: electronics / testgear

author: hussamaldean
author_rank: Unknown
timestamp: January 26, 2018, 04:10:51 pm
content: Hi all,I got my hand on LCR T5 component tester and I am testing some components and I noticed that the capacitance measurement is 10 time less than the one shown on the label, zenor diode detected as normal diode but the resistance detection is accurateis there anyway to calibrate the device ?Regards

author: kripton2035
author_rank: Super Contributor
timestamp: January 26, 2018, 04:39:26 pm
content: something inside must be badly soldered.

author: hussamaldean
author_rank: Unknown
timestamp: January 26, 2018, 04:55:36 pm
content: Quote from: kripton2035 on January 26, 2018, 04:39:26 pmI opened it and seems okand I noticed it is very slow and takes very long time to identify

author: PedroDaGr8
author_rank: Super Contributor
timestamp: January 26, 2018, 05:07:38 pm
content: The T5 is just a variant of the $20 transistor tester. This tester is rebadged and sold all over the internet (it is 100% open-source) but the english facing discussion (the inventors are German I believe) is actually this thread on this forum:https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

author: hussamaldean
author_rank: Unknown
timestamp: January 26, 2018, 05:13:08 pm
content: Quote from: PedroDaGr8 on January 26, 2018, 05:07:38 pmI need to fix the issue of slow identification and inaccurate results for capacitance measurement, testing the inductance

author: PedroDaGr8
author_rank: Super Contributor
timestamp: January 26, 2018, 06:05:36 pm
content: My point is that if you ask in that thread, you will encounter people, including the developer madires, who know EVERYTHING about how those testers work. They can tell you what is possible and what is not, what is faulty and what is not, etc. and help you troubleshoot.