hybridfree/eevblog-posts huggingface dataset:
Old vehicle scanner (Hi Scan ) linear flash card problem - Page 1
Forum section: electronics / testgear

author: soptea
author_rank: Newbie
timestamp: July 30, 2016, 09:13:59 pm
content: Old (year 1998 ) has a 2 channel scope which is what I needed more. I am looking for a way to backup the2 mB PCMCIA linear flash card ,because without it the tool is useless .Bought from ebay 2 linear flash card ,which can be read/erase/write but none of the card worked ,tool just keep rebooting like there were no card inserted .1st card bought is SM9FA832-C7500S ,2nd an INTEL series 2+ used in Cisco routersDon t know much about PCMCIA ,is there any area that cannot be modified/read only ?Thanks !

author: gabita976
author_rank: Newbie
timestamp: December 21, 2016, 10:39:33 pm
content: i have small problem. i lock for pinout of original rs232c cable for carman1 hi-scan prothanks in advance

author: richnormand
author_rank: Unknown
timestamp: December 21, 2016, 11:33:47 pm
content: Quote from: soptea on July 30, 2016, 09:13:59 pmSome older equipment with PCMCIA cards will only work with static ram cards (The ones with a battery backup in them) and not the more common flash type.A good example are the 93xx LeCroy oscilloscope with the front PCMCIA slot on the front panel. If you insert a more "modern" card it will act as if the card is not there even though you checked that the data was actually there with your laptop!Got a PCMCIA static ram card from ebay, inserted a fresh button battery in it and all is OK now.If your original card turns out to be a static ram card be careful as all the info will vanish when the battery dies or is removed.
AVCOM PSA-37D VS AVCOM PSA-37 XP - Page 1
Forum section: electronics / testgear

author: djevanstn
author_rank: Newbie
timestamp: December 21, 2016, 08:14:35 pm
content: I have two questions :- Other than the obvious, display and layout, I was wondering if someone here may know the differences between these two units?- Would you still purchase one in decent shape for $300.00 to $500.00 with no specific purpose other than looking for sat signals(aligning) maybe some wifi planning (with the down converter) and very general amateur radio useThanks !Don . . .
VXI DATRON/WAVETEK 1362S - Page 1
Forum section: electronics / testgear

author: jfphp
author_rank: Regular Contributor
timestamp: December 22, 2016, 09:14:37 pm
content: Hello,I am looking for a virtual panel for this DMM but alone, I mean not linked neither with HP VEE nor with Labwiew (or, at least, for an exe sparing me the task to write a lot of code lines...). Thank you.
My first soldering Station - Page 1
Forum section: electronics / testgear

author: aniket
author_rank: Contributor
timestamp: December 21, 2016, 12:13:39 pm
content: Hi all,So I am planning to buy my first soldering station prime candidates are as follows .1. Hakko FX888D2. DSS363. generic Cheap 936 or 938Being in India process its own challenges , I got the quote for a Hakko FX888D close to 230$ where as its actual cost is <100$ as i saw on amazon.com the price difference is mainly due to dealer margin , import duties in india etc etc . So i went ahead and found some cheaper solution like the DSS36 which cost roughly 120$ and within my reach. After talking to the seller i got to know that this is a chinese OEM manufacture. Does anybody have a idea how good or bad this DSS36 actually isFind attached datasheet .or some one could point to some cheaper and better alternative & I mainly do 0603,1206 SOIC8 some 64-Pin QFP and gerneric TH soldering.thanks and RegardsAniket
Oscope with isolated inputs - Page 1
Forum section: electronics / testgear

author: BlueRider
author_rank: Newbie
timestamp: December 21, 2016, 02:44:55 am
content: Hi folks, I'm new here to the forum, but I know I'm in the right place......(should have been here all along...lol) Been watching Dave's videos when I get a chance, and learning whatever I can. My question is regarding oscopes with isolated inputs, such as the Fluke 190 series, Tektronix THS3024, etc. Are these battery powered type of scopes the only ones that truly have isolated inputs?? I use a Fluke 199C occasionally at work, along with some other Tek scopes. That said, I did get a Rigol DS1102E earlier this year for home use (hobby stuff) and have liked it thus far. However, I will say I wish I had a scope with isolated inputs in order to take different measurements without having to worry about grounding something.I'm far from a scope expert, so I'm hoping some of you experts will jump in here with reasons/suggestions why I should go with a particular scope. My preference thus far has been to stick with a portable scope, due to the obvious portability, and mostly the isolation of all channels. The scopes I mentioned above are not cheap by any means, but I also wonder if getting a portable scope in that range that I might be losing out on a great bench scope in that same $$ range. I would have thought there would have been more scopes with isolated inputs......maybe I'm looking in the wrong places, or too low of price range.....HELP!Any and all feedback is welcomed and appreciated.Thanks,BlueRider

author: BravoV
author_rank: Super Contributor
timestamp: December 21, 2016, 02:52:47 am
content: Quote from: BlueRider on December 21, 2016, 02:44:55 amYes, they're truly isolated, this example illustration from Tektronix handheld scope should give you a clear details ...

author: tautech
author_rank: Super Contributor
timestamp: December 21, 2016, 03:22:53 am
content: Yes there are HH DSO's with 2 isolated inputs but MOST only offer disconnection from mains ground (for 1 channel) and the input BNC's are commoned like the vast majority of benchtop scopes.Eg. In the Siglent range we have both, the SHS1000 (isolated inputs) and SHS800 (commoned inputs).http://www.siglentamerica.com/pd.aspx?tid=2&T=1Usually the cheapest solution for input isolation is Differential probes, something like a Pintek DP-25.

author: JPortici
author_rank: Super Contributor
timestamp: December 21, 2016, 05:54:34 am
content: the isolated-input-scope i use is the tektronix tps2000.4 chan + triggerevery channel is isolated (has its own ground connection)operates on mains or batteryand it has a power analysis optionthat's it. no decode, very tiny memory, very high cost.. well not so high compared to other scopes with 4 isolated ins. think like a tek tds but with isolated inputs.
4 wire measurement (Kelvin clips) - handheld LCR meters - Page 1
Forum section: electronics / testgear

author: bozidarms
author_rank: Regular Contributor
timestamp: December 20, 2016, 09:11:53 am
content: Hi to the group,on some sites can bee read that DE-5000 LCR meter is capable for 4 wire measurement, in contrary Agilent U1733C not.Can someone, please, explain why - both LCR meters have the same 3 connections: plus, minus and guard?Thanks in advance

author: PedroDaGr8
author_rank: Super Contributor
timestamp: December 20, 2016, 07:15:35 pm
content: Quote from: bozidarms on December 20, 2016, 09:11:53 amOn the Der EE, the slots are actually two connections in one. They are a kind of clip, where each side of the clip is a part of the five wire connection (traditional kelvin four wire plus guard). The adapters use a double sided PCB that slides into those slots breaking it down into the individual connecitons.You can see more in my teardown here:https://www.eevblog.com/forum/testgear/der-ee-de-5000-unboxing-and-teardown/

author: TurboTom
author_rank: Super Contributor
timestamp: December 20, 2016, 07:27:29 pm
content: Before buying any LCR meter with one of the Cyrustek chipsets, and if the somewhat higher spending is not an issue, I would strongly recommend the Applent AT826. After I purchased one of these for my "basement lab" and showed it to the engineers at work, we meanwhile bought there two more since all the users were really amazed about these instruments. Moreover, the AT826 comes with a set of kelvin clips and a really decent pair of SMD tweezers which already makes the price look much more competitive. At least I never regretted the money spent on that instrument since it's always been a joy to use. Accuracy and measurement ranges are really great.Cheers,Thomas

author: TimFox
author_rank: Super Contributor
timestamp: December 20, 2016, 09:52:12 pm
content: On the DER DE-5000, when you plug in one of the auxiliary cables into the slots, using the banana jacks only for mechanical support (plastic pins in the mating connector) you have the four wires needed for a Kelvin connection. The alligator-clip connector connects two wires to each clip at the clip.

author: bozidarms
author_rank: Regular Contributor
timestamp: December 21, 2016, 12:41:08 am
content: Thanks for responses, i was just curious.Besides, decision is already met before - Agilent,but this Applent AT826 seems to be very interesting.By the way - my "lab" is also in basementRegards
PC USB 2CH 60M 200MS/s Digital Oscilloscope 60M Spectrum analyzer Data Recorder - Page 1
Forum section: electronics / testgear

author: RJ
author_rank: Contributor
timestamp: December 18, 2016, 12:43:10 am
content: Has anyone tried one of these?PC USB 2CH 60M 200MS/s Digital Oscilloscope 60M Spectrum analyzer Data Recorderhttp://www.ebay.com/itm/141102674263?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT&rmvSB=true

author: RJ
author_rank: Contributor
timestamp: December 18, 2016, 09:35:11 pm
content: Ok how about some thoughts on this thing?

author: thm_w
author_rank: Super Contributor
timestamp: December 19, 2016, 10:51:41 pm
content: There are a few comments, not of much use, on aliexpress:https://www.aliexpress.com/item/Free-shipping-New-2-Channels-ISDS220A-2-IN-1-PC-USB-virtual-Digital-oscilloscop-Spectrum-analyzers/32353908055.htmlSeems they used to do Hantek clones, but this one falls between 6052BE and 6082BE, while having better specs for memory per channel (512kB).Up to you if you want to risk it with a no name brand and want a USB scope.

author: RJ
author_rank: Contributor
timestamp: December 20, 2016, 02:06:12 am
content: Thanks for the info. Not really after the scope part. I'm looking for the spectrum analyzer and Sinad part of this unit. Having all three in one is a cool idea but how well it works is the big question.

author: guenthert
author_rank: Frequent Contributor
timestamp: December 20, 2016, 08:19:50 pm
content: Quote from: RJ on December 18, 2016, 09:35:11 pm8 bit vertical resolution is a bit underwhelming. It's common for digital oscilloscopes, but those tend to be much faster. Those 8bit won't be a joy as spectrum analyzer.The digilent analog discovery uses 14bit (but "only" 100MHz sampling rate) and is in similar price range. It won't replace either an oscilloscope or spectrum analyzer, but as educational or hobby tool it's works quite well I'd say (I like its network analyzer feature using the built-in wave-form generator).Those PC based solutions stand and fall with the software. The one for the analog discovery is free, works IMHO quite well and there's a documented API if you care to write customized software.

author: coppice
author_rank: Super Contributor
timestamp: December 20, 2016, 10:57:13 pm
content: Quote from: RJ on December 20, 2016, 02:06:12 amA tool like this probably produces some useful, if limited, results as a spectrum analyser. With an 8 bit ADC its a bit of a joke trying to use it for SINAD measurements.

author: RJ
author_rank: Contributor
timestamp: December 20, 2016, 11:17:22 pm
content: Yeah I'm passing on it for now. Have someone on another site getting one of these any day now and said to hold off until he gets his and does a full test on it then give a review. As for the Sinad meter I followed Rob's foot steps and got the one he has. Don't need a S-G as I have a killer one already. S-A is the only thing I am missing but the cost of those things are way out of my budget for a long time. I will come back and give the results on this unit once the testing is over. Could be a week to a month so stay tuned..
MHS 5200A USB Driver - Page 1
Forum section: electronics / testgear

author: r07
author_rank: Newbie
timestamp: December 19, 2016, 06:05:19 pm
content: I just purchased an MHS 5200A from ebay. it seems to be working fine in that it lights up properly, but I cannot get either of my PCs to 'connect' to it. it does not show up as a USB device. the MHS 5200A software does correctly identify the COM ports, which are COM1 on one PC and COM1 and COM5 on the other PC but none of these connect. I'm stuck. the next step is to connect this device to an oscilloscope to make sure it's working. I prefer to use the software so I can save data on the generated signal.any comments welcome, especially on:1) how to connect via USB.2) suggestions on checking to make sure the device works properly.3) suggestions on how to capture the generated signal as a data file.

author: paf
author_rank: Regular Contributor
timestamp: December 19, 2016, 06:20:32 pm
content: You need to install the CH340/CH341 driver, on the CD and also available at:http://www.wch.cn/download/CH341SER_ZIP.html

author: r07
author_rank: Newbie
timestamp: December 19, 2016, 11:25:18 pm
content: thanks.i've tried that repeatedly but haven't been able to get it to work. however, the URL you listed does contain a folder that is not on the CD. this folder is named INSTALL and has a file named README.TXT which is not in English. there is also an executable that is mostly not in English. this executable lists COM1 - COM16 and also has settings for baud rate, bit length and other serial parameters. there is also a button labeled SetusbMode. i tried various combinations of button settings and presses, but still no connection to the device from the PC.

author: paf
author_rank: Regular Contributor
timestamp: December 20, 2016, 08:04:58 am
content: The right folder of the "zip" is the CH341 folder. The driver is there. You should run the setup.exe from there, or when Windows ask for a driver point it to that folder.

author: r07
author_rank: Newbie
timestamp: December 20, 2016, 02:15:58 pm
content: Thanks.there is no folder named CH341, but there is one named CH341.SER and another folder named INSTALL. inside the CH341SER folder is a file named SETUP.EXE. attached are screen prints. the first one shows what happens when SETUP.EXE is run. The second one shows the contents of the CH341SER\INSTALL folder in the zip file. I've tried everything. the first screen shot shows that something called WCH.CN is related to a USB with an address of CH340. the third screen shot, on page 2 of the attachment, shows USB information from device manager. there is no new USB port and none with an address of CH340.i've tried this on two computers so far. one runs W7x64 and the other runs Vista.
Lecroy waverunner 6000X service passwords - Page 1
Forum section: electronics / testgear

author: Jwalling
author_rank: Unknown
timestamp: December 19, 2016, 03:27:59 pm
content: Does anyone happen to know what the service passwords are for Lecroy Waverunners?I have a 6100 and a 6200A on my bench and I would like to see what's in there.Thanks!Jay
Agilent DSO3062A - Page 1
Forum section: electronics / testgear

author: mattbrockuk
author_rank: Contributor
timestamp: December 19, 2016, 01:33:21 pm
content: Hi guysI've got an Agilent DSO3062A 'scope thats branded as being 60mhz - they did these in various frequencys (3102 was 100mhz, 3152 - 150mhz, 3202 was 200mhz).Purely out of interest... is it just a software lock to the frequency... i.e. is the hardware the same under the hood? And of course, if so, does anyone know how to "upgrade" itI believe these might be rebadged Rigols?Thanks in advanceMatt
Tektronix TLA714 to remote server connection - Page 1
Forum section: electronics / testgear

author: baakre
author_rank: Newbie
timestamp: December 18, 2016, 01:11:09 pm
content: Hello,I've got a TLA714 mainframe with a TLA7N3 and TLA7D1 modules installed. The TLA714 is running TLA SW 5.1 SP1. I would like to use a newer TLA SW version on a networked client system.I first tried TLA SW 5.8 on the client (a Windows Vista machine). With TLA 5.8, I could connect to the TLA714 on the network. However, neither of the modules were recognized. Viewing "System Properties", it reported "Unsupported device" for both of the modules.Well, one problem was that I was running FW version 4.x on the TLA7N3. Using a updated firmware file for the module, I successfully upgraded the firmware on the TLA7N3 to version 5.5.However, this still did not seem to fix the problem. Looking through the release notes for 5.8, it wasn't clear that either the TLA7N3 or TLA7D1 were supported. So, I uninstalled TLA SW 5.8 and installed version 5.7. The release notes for this version specifically list the TLA7N/P/Qx in the SW version table. (NO mention of the DSO module, unfortunately) Unfortunately, still no change. I can connect to the TLA714 just fine, but bring ing up system properties, it reports two unsupported devices. (See screen capture attachment)My next attempt will be to try an even earlier version of the client SW. Perhaps 5.5?Does anyone else have a similar configuration that they are successfully using?

author: nctnico
author_rank: Super Contributor
timestamp: December 18, 2016, 01:30:16 pm
content: Did you stop de client software on the logic analyser itself?
Anritsu MG3641A - Page 1
Forum section: electronics / testgear

author: alexo
author_rank: Contributor
timestamp: December 18, 2016, 11:22:13 am
content: Sorry to repeat a post but I need some advice : for a physics experiment I need a spectrally clean signal gen with very little phase noise. 2-300Khz to around 1Ghz. What might be some good 2nd hand options around $1k ?I'd prefer something which can be repaired should need arise. Though I suspect spares might not be available.No fancy "bells and whistles" needed, not even modulation.
MHS-5200A New Software - Page 1
Forum section: electronics / testgear

author: danadak
author_rank: Super Contributor
timestamp: April 30, 2016, 04:58:18 pm
content: I loaded this new version (attached), connected gen, and tried to do an arbitrary waveform.Loaded it on "Arbitrary" tab, then wrote to arb00 mem location.https://www.dropbox.com/s/cdlsuv2w5rkss6g/MHS-5200A_en5.0.rar?dl=0It shows up on "Control Panel" tab when I select arb00 as wavefom,but does not output out of the generator.I need a drink........Also sweep mode do. And no sweep trigger out of TTL outputs on gen to synch the displayon scope to the sweep. Although I think one could use 2'ond channel to create the triggeras both channels operate off same time base.Regards, Dana.

author: r07
author_rank: Newbie
timestamp: December 17, 2016, 10:02:51 pm
content: I recently purchased an MHS-5200A and followed the instructions for installing the software. the software version is 5.01. am not able to connect the software to the device. tried your software on Dropbox, which is an earlier version, but no success. have tried this on two PCs - one running W7 64bit and the other Vista. any comments or suggestions welcomed!
(solved) Rigol MSO1104Z-S Pulse Generator is Pointless? - Page 1
Forum section: electronics / testgear

author: hexreader
author_rank: Frequent Contributor
timestamp: December 16, 2016, 12:16:32 pm
content: Just learning the features on my MSO1104Z-S and I am confused as to the purpose of "Pulse" selection as one of the wave selections on the in-built signal generators.I was disappointed to find that pulse generator Duty Cycle is limited to 10% as the lowest value.I am struggling to see what "pulse" waveform gives me that "square" waveform does not.Is "pulse" mode just a marketing gimmick, or am I missing something obvious?Any help or insight will be appreciated, though it is not important, just a matter of curiosity.EDIT:- sorry.... posted too soon. Answer turns out to be obvious now I look harder.....Square wave has no duty cycle adjustment- it really is square waves only.

author: tautech
author_rank: Super Contributor
timestamp: December 16, 2016, 03:54:17 pm
content: Had me checking my Siglent..........IMO a square wave should be just that; square, 50% duty cycle but it's up to the manufacturer in their FW as to the adjustments available.Eg, My SDS2304X has adjustment from 20-80% duty cycle for square wave and in Pulse mode @ 10 MHz (max) widths from 48ns up.They are occasionally quite handy but can't offer the functionality of a fully fledged AWG.

author: hexreader
author_rank: Frequent Contributor
timestamp: December 16, 2016, 04:27:09 pm
content: I think I like your Siglent more than I like my Rigol. (can't find an envy emoticon)... but I don't have the budget for the best tools, so I am more than happy to accept what I can afford along with it's limitations.
Weird auto ranging behavior, another issue of Keysight multimeter? - Page 1
Forum section: electronics / testgear

author: gamalot
author_rank: Super Contributor
timestamp: December 17, 2016, 02:11:29 pm
content: I've found this strange thing while I was trying to test the secondary winding resistance of the transformer in my broken 34970A.The resistance should be around 30 Ohm, but the range looks like stuck at 100k and wont go down to 100 Ohm automatically.It only happens to my Keysight 34465A, all my other meters don't have this problem. See pictures.

author: Kleinstein
author_rank: Super Contributor
timestamp: December 17, 2016, 02:35:45 pm
content: A transfomer winding has a significant inductance. This could upset the resistance measurement and especially range (and thus current) switching. To reduce the inductance I suggest shortening one of the other windings while measuring resistance.

author: gamalot
author_rank: Super Contributor
timestamp: December 17, 2016, 02:44:02 pm
content: Quote from: Kleinstein on December 17, 2016, 02:35:45 pmYes I know what you are talking about and I totally agree with you. But what I wanna say is why it only happens to my 34465A not others.

author: Kleinstein
author_rank: Super Contributor
timestamp: December 17, 2016, 03:01:05 pm
content: Newer meters tend to do things like auto ranging fast and thus makes them more sensitive to inductance. I would expect that some of the other DMMs will have a similar problem too.

author: gamalot
author_rank: Super Contributor
timestamp: December 17, 2016, 03:05:06 pm
content: I have just done some additional tests. If I turn off the auto-zero or turn on the low-power mode, the problem will be disappeared, Very interesting.

author: gamalot
author_rank: Super Contributor
timestamp: December 17, 2016, 03:08:17 pm
content: Quote from: Kleinstein on December 17, 2016, 03:01:05 pmThere are not too many new meters in the market, all I know are Keysight3446x/7x and Keithley DMM7510, any others?
Old, Obscure HP Product Manuals Source? - Page 1
Forum section: electronics / testgear

author: forrestc
author_rank: Unknown
timestamp: December 15, 2016, 01:05:18 pm
content: I've ended up with some HP Z2466A VXI cards I'd like to put to use for some automated testing I'm planning on doing (Quad 16x4 solid state relay matrix card).Unfortunately, the manual for this seems to have been converted to unobtainium once the product was discontinued. My usually fine google-fu and out of desperation bing-fu, dogpile-fu, etc. etc. etc. has yet to yield a source for a manuals for this. I've searched on quite a few manual sites I knew of, but still no luck. The only thing I've found is a couple of catalog pages which describe this product (which happens to be exactly what I'm looking for).I'm hoping someone knows of a resource or two I haven't looked at yet. Ideas?
HP Agilent 82357B USB-GPIB Interface High-Speed USB 2 - how to test? - Page 1
Forum section: electronics / testgear

author: enut11
author_rank: Super Contributor
timestamp: December 13, 2016, 09:41:34 am
content: HiI have an HP3456A DMM and have just taken delivery of a used HP Agilent 82357B USB-GPIB High-Speed USB 2 interface.Is there a simple way to test this device to see if it works?enut11

author: Micke
author_rank: Regular Contributor
timestamp: December 13, 2016, 12:07:28 pm
content: Hi!One idea could be to install National Instruments NI-VISA or Keysight I/O-libraries.They are quite big though! there is also available a much smaller lightweight version of NI-VISA if you plan to use Python (with PyVISA) for example.Then in any of the suites, you can try send for example *IDN? to the multimeter, it should then respond with its model number, FW version number etc.In NI version, run NI-MAX, use the "Open VISA Test Panel", where you can send preconfigured *IDN? command.

author: enut11
author_rank: Super Contributor
timestamp: December 13, 2016, 08:03:02 pm
content: Thanks Micke, I will try those tests.enut11

author: plesa
author_rank: Frequent Contributor
timestamp: December 13, 2016, 08:39:29 pm
content: Install Keysight connection expert.BTW your meter does not support *IDN? command but ID.Check thishttps://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib-usb-adaptors-on-ebay-the-real-deal/In general after connection PID should be 518 and after firmware upload 718.

author: MarkL
author_rank: Unknown
timestamp: December 14, 2016, 04:16:37 am
content: The 3456A is a pre-SCPI instrument and doesn't have an "*IDN?" command, or "ID" for that matter.If you want a command with a return value, try "REI" (all uppercase). This will return the number of power line cycles per integration, which by default is 10. The actual string returned should be "+10.00000E+0".If you do a read from it without issuing a command, it will return the next data acquisition.Hitting the reset button on the front panel will display the unit's GPIB address, which is set at the factory to 22 but could have been changed. Also, make sure it is not set for "Talk-Only" mode (left-most switch should be down).The 82357B is also supported by linux-gpib, if you're interested. But you did say "simple", and I don't think the 82357B setup under linux-gpib qualifies.

author: enut11
author_rank: Super Contributor
timestamp: December 15, 2016, 10:56:24 am
content: Thank you plesa and MarkL. Yes, a simple test is what I am after.
Accuracy DMM - Page 1
Forum section: electronics / testgear

author: JanJansen
author_rank: Frequent Contributor
timestamp: December 14, 2016, 02:32:29 pm
content: Hi, does DMMs with hi accuracy have these numbers for nothing ?,i mean, do they jump around ?, or does it give a stable reading acros all digits ?Is it worth buying ?thank you

author: Fortran
author_rank: Regular Contributor
timestamp: December 14, 2016, 03:06:30 pm
content: Check the manual for the DMM in question. It should say what kind of accuracy you can expect.One of my HP's have a "High Resolution" mode, which sacrifices update rate and takes a lot of samples and averages them out which sometimes gives you an extra digit depending on your range.They might mean something like that, but again, that would be mentioned in the manual.If you're measuring a clean supply, you get a clean reading.If your supply is full of ripple, it doesn't matter how good the multimeter is, you're still gonna get the last digit(s) jumping around.

author: JanJansen
author_rank: Frequent Contributor
timestamp: December 14, 2016, 03:30:53 pm
content: I mean more for with resistors or diodes, do they give stable reading ?

author: Kleinstein
author_rank: Super Contributor
timestamp: December 14, 2016, 03:50:18 pm
content: It is quite common that the last digit is moving a round a little. It also depends on the range and update rate used. Slower readings can be more stable and sometime even show an extra digit.Quite often accuracy is not as good as the resolution - so the last digit or sometimes even more are not guarantied to be accurate, but it can be still useful to see small changes and the difference can than still be meaningful.With the resistor ranges it is well possible that the ranges for the high resistors (e.g. 2 M and more) are a little less stable. The reading on high resistors is just sensitive to external capacitive coupled disturbance and more noise by principle.Similar the other ranges might not be all the same accuracy. Especially AC readings are usually less accurate. So check the manual to compare - not just looking at the number of digits / counts.

author: Fortran
author_rank: Regular Contributor
timestamp: December 14, 2016, 04:22:31 pm
content: To put it this way.Which multimeter(s) are you looking at, and what do you intend to use it for?If the "hi resolution" you mention is a marketing scheme, or an actual feature, we'll know pretty instantly.

author: JanJansen
author_rank: Frequent Contributor
timestamp: December 14, 2016, 04:37:46 pm
content: I am looking to a : Hameg HMC8012
Looking for a new AC/DC clamp meter - Page 1
Forum section: electronics / testgear

author: nbritton
author_rank: Frequent Contributor
timestamp: December 11, 2016, 06:59:42 am
content: My RadioShack 22-172 is busted, so I'm looking for a recommendation for a new AC/DC clamp meter. Primary purpose would be for electricians work measuring AC amperage, but I would also like a meter that is versatile enough for measuring current for low voltage electronics projects. I can budget up to maybe $250. I tend to stay away from tier 1 players like fluke because they're usually way overpriced compared to lessor tier players.

author: Lightages
author_rank: Unknown
timestamp: December 11, 2016, 08:37:09 pm
content: I posted this link, but it might not do everything you want. It is a great clamp meter but more for industrial electricians. I would still suggest it and another meter to compliment it. You will still be far below your budget.http://www.tme.eu/en/details/bm089/meters-and-acdc-clamp-probes/brymen/The second clam meter would be the UT210E or UT211B for lower current and voltages. I would lean toward the UT211B. If you only want to buy one clamp meter then for your stated uses I would get the UT211B.Edited to add information.

author: nbritton
author_rank: Frequent Contributor
timestamp: December 14, 2016, 04:28:49 am
content: Quote from: Lightages on December 11, 2016, 08:37:09 pmI don't think that Brymen has True RMS. However, what are your thoughts on the Brymen BM197? It's only $25 more than the BM089.http://www.brymen.com/product-html/cata190/BM190_Catalog.pdf

author: Lightages
author_rank: Unknown
timestamp: December 14, 2016, 05:14:11 am
content: The BM089 has TRMS, as does the BM197. They are both great meters. Pick the one that has the features you want. The BM197 might be better suited to you.
Rare EMI / Light Filters for Tek 7000 Series Scopes on Ebay - Page 1
Forum section: electronics / testgear

author: Marc M.
author_rank: Regular Contributor
timestamp: December 13, 2016, 06:33:01 pm
content: Tek 7000 fans, I ran across these on Fleabay and picked up a couple. They have them listed as "TEKTRONIX 378-0603-00 LIGHT FILTER NEW OLD STOCK 5 1/4 X 4 3/4" so they're easily missed. They are actually part of the EMI option 3 (at least on the 7844's) which also includes added RF gaskets on the covers, and that's about it. The filter is a flat black fine mesh screen which replaces the standard off white bezel. It cuts the glare down considerably at the cost of a bit of brightness as well as providing EMI shielding. It was a pretty rare option and this is the 1st time I've run into them on Fleabay (caveat: I haven't been actively searching). They are US Government Surplus and came in sealed metalized bags, wrapped in bubble wrap, and finally in a die-cut, fold out cardboard carrier. Top quality all the way. A bit pricey for the shipping ($12.85 + $2.00 each additional) but $7.99 for the filter itself is very reasonable. I've included a couple of requisite pictures. The 'before and after' shots were taken at a fixed f/4 1/15sec IS0-800 for comparison.The usual disclaimer: I don't know the seller from Adam, just excited to find these and knew some fellow EEVblog members would share my enthusiasm!Link:http://www.ebay.com/itm/251270874903?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

author: edavid
author_rank: Super Contributor
timestamp: December 13, 2016, 08:01:00 pm
content: Just wanted to mention that I find these far inferior to the regular plastic filters for normal use. It's like looking at your scope through a window screen.
Keysight Connection Expert - How to Connect to Instrument? - Page 1
Forum section: electronics / testgear

author: RCHRDM
author_rank: Regular Contributor
timestamp: December 12, 2016, 02:36:22 am
content: I have an Agilent E4400B and I am trying to connect it up to some of the Keysight lab software. There is an application called "Keysight Connection Expert" that runs to connect the software or computer to the instrument. I need some help figuring out how to get it to see the instrument using and RS-232 cable.

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: December 12, 2016, 06:33:56 pm
content: I'd give your local Keysight Contact Center a quick call, it's pretty painless and quick.

author: RCHRDM
author_rank: Regular Contributor
timestamp: December 12, 2016, 10:01:54 pm
content: Thanks, I did that and the technician was very helpful. He thought he recalled that a custom RS-232 serial cable is needed. Also, my model of signal generator may not work with some of the software I downloaded. He pointed me to another Keysight web page where there was some other software called Inuilink.I think I will buy one of those Agilent GPIB to USB adapters that are for sale on eBay just now and see if that works.My model of signal generator is analog, so there will be a limit to what I can do.Richard
Hack Rigol DS1074Z-S PLUS  - Page 1
Forum section: electronics / testgear

author: ElettroFabio
author_rank: Newbie
timestamp: December 12, 2016, 06:29:00 pm
content: Hello, I'm new to the forum and start right away with the excuse for my bad English. However, I have recently bought the DS1074Z Rigol S-Plus and the first thing I immediately tried to unlock all options with this guide:but inserting the codes generated by "Rigup" oscilloscope I shows: Invalid License!Any of you have the solution to this problem?

author: Fungus
author_rank: Super Contributor
timestamp: December 12, 2016, 08:10:46 pm
content: Quote from: ElettroFabio on December 12, 2016, 06:29:00 pmThe plus models can't be hacked with simple unlock codes.This is the thread where people are trying to hack them (with limited success)https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/4300/
Tektronix TDS 1002 -> 2002 (monochrome to color display) - Page 1
Forum section: electronics / testgear

author: harm
author_rank: Contributor
timestamp: December 11, 2016, 07:01:14 pm
content: Hi,I've a TDS1002 scope with broken (monochrome) display. I want to replace/install a newcolor display.Will it work without 'hacking' the TDS1002 scope to TDS2002 and only wire the color display the right way (18pin mainboard to 15-pin display connector)?Anyone done this before?Thanks!HarmThe Netherlands
Hantek 6022BE - Page 1
Forum section: electronics / testgear

author: Fabio1963
author_rank: Newbie
timestamp: December 10, 2016, 01:12:47 pm
content: Goog morningthis is my first post. I bought an Hantek 6022BE and I've played with its SDK. So I developed a little spectrum analyzer using VB.NET (framework 4.5). If anyone is interested this is the dropbox link:https://www.dropbox.com/sh/elzchpzufbv2t6v/AAAVoirJRXP92jZ-GX7Cez_5a?dl=0Fabio

author: daybyter
author_rank: Frequent Contributor
timestamp: December 10, 2016, 09:37:21 pm
content: Better post it in this thread:https://www.eevblog.com/forum/testgear/hantek-6022be-20mhz-usb-dso/
Rigol 1054Z New vs Refurb? - Page 1
Forum section: electronics / testgear

author: made2hack
author_rank: Frequent Contributor
timestamp: December 09, 2016, 03:49:45 pm
content: Hello all,Looking for some opinion from the forum.Would you buy a refurbished 1054Z for 40 EUR off the price of the New unit?Comes with 90 days warranty vs the 2 year? Is it worth saving that 40 Euros?Thanks,

author: pascal_sweden
author_rank: Super Contributor
timestamp: December 09, 2016, 04:19:01 pm
content: 40 USD is like 5 Starbucks coffees in Norway.Go for the brand new one!The brand new, factory sealed unboxing feeling on its own, and the 2 years warranty can't be beaten

author: smithnerd
author_rank: Regular Contributor
timestamp: December 09, 2016, 04:20:54 pm
content: Quote from: made2hack on December 09, 2016, 03:49:45 pmDoesn't seem like it to me.

author: Fungus
author_rank: Super Contributor
timestamp: December 09, 2016, 04:21:11 pm
content: Quote from: made2hack on December 09, 2016, 03:49:45 pmNo.

author: metrologist
author_rank: Super Contributor
timestamp: December 09, 2016, 05:04:05 pm
content: I thought the warranty was 3 years?

author: made2hack
author_rank: Frequent Contributor
timestamp: December 10, 2016, 01:13:00 pm
content: Quote from: metrologist on December 09, 2016, 05:04:05 pmYou are correct. Just noticed on the Rigol EU website. Yeah, definitely worth the 40 Euros.

author: Fungus
author_rank: Super Contributor
timestamp: December 10, 2016, 02:01:43 pm
content: Quote from: made2hack on December 10, 2016, 01:13:00 pmIf you get a 3-year warranty direct from Rigol then yes, go for it.
Microcurrent out of range - Page 1
Forum section: electronics / testgear

author: DavidDLC
author_rank: Frequent Contributor
timestamp: December 09, 2016, 12:25:11 am
content: How Am I know if the microcurrent is out of range ? This question is when I want to measure unknown currents.What is the microcurrent value for overload ?I made this just for experiment:I'm reading a current of 155 uA on the uA range very stable, then I switch to the nano amps range expecting to have the maximum value on the range which is 1250 nA, but the readings on the voltmeter are fluctuating between 770 and 817 nano amps.Can somebody explain please ?David DLC.

author: mzacharias
author_rank: Frequent Contributor
timestamp: December 09, 2016, 01:05:40 pm
content: I have no actual experience with the microcurrent but nevertheless I'm willing to suggest that that this is normal operation. Just as any ordinary multimeter uses progressively larger value shunt resistors with a corresponding increase in burden voltage, the microcurrent must play by the same rules, it is merely designed mainly to minimize these losses where insertion of such a measurement device might upset normal operation of the circuit, mainly an issue with low voltage, relatively high current circuits, 3.3 volts, 2.5. 1.2, etc.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: December 09, 2016, 06:03:55 pm
content: Dave, can you comment on this please ?David DLC

author: guenthert
author_rank: Frequent Contributor
timestamp: December 09, 2016, 06:07:56 pm
content: In the nano amp range the u-current uses a moderately large 10 kOhm shunt resistor. This seems to be large enough to allow EMI picked up via the leads to have a significant effect. Try shielding the leads and the u-current or otherwise minimizing EMI (at my place Ethernet-over-powerline, a.k.a. HomePlug, causes quite some grieve).Generally speaking though, you might want to avoid driving measurement instruments outside their specifications.

author: wraper
author_rank: Unknown
timestamp: December 09, 2016, 06:36:56 pm
content: https://www.eevblog.com/projects/ucurrent/So unless output voltage does not exceed specified range (1.25V), it shouldn't be overloaded (if there is DC on the input).Quote

author: DavidDLC
author_rank: Frequent Contributor
timestamp: December 09, 2016, 07:10:21 pm
content: Quote from: guenthert on December 09, 2016, 06:07:56 pmI know that, my original comment was in the case you are measuring an unknown current.David DLC.
HP-6501R probes - Page 1
Forum section: electronics / testgear

author: cheeseit
author_rank: Regular Contributor
timestamp: December 04, 2016, 07:11:52 pm
content: I need some probes for a Tek 2465B and have found someone selling a set of four of these HP-6501R x10 500MHz probes for about €125 including shipping.I can't find much on them so does anyone own some of these or have experience with them? I wasn't that impressed by a pair of P6100 I bought some time ago but they only cost like a six pack of somewhat good beer so no big deal. These four cost a bit more and kinda looks like more of the same so the question is if I would be better of saving the money for something else?

author: tggzzz
author_rank: Super Contributor
timestamp: December 04, 2016, 08:38:12 pm
content: Be aware those probes input impedance is 25ohms at 500MHz, and that they will show resonances at 100-300MHz depending on the ground connection.Depending on what you are doing, you might like to consider resistive divider probes, a.k.a. Z0 probes.FFI seehttps://entertaininghacks.wordpress.com/library-2/scope-probe-reference-material/

author: cheeseit
author_rank: Regular Contributor
timestamp: December 10, 2016, 10:37:28 pm
content: That is a great page you linked to, with loads of information that will take some time to get through and likely much longer to absorb. Bookmarked, thanks.I haven't really done anything that required high bandwidth and my fastest scope was a analog 100MHz scope before the 2465B. I mostly used a 20MHz Hameg or a 60MHz Fluke combiscope so my requirements are rather modest.I decided to skip on the HP-6501R probes and have instead (hopefully) bought another 2465B. It appears to be fully working, is a bit dirty but looks bright and in good condition, and includes four P6137 and a P6105A, probe acessories, pouches and manual for scope and probes. I'm waiting for seller to message me how to pay the €180 including shipping I negotiated, but the deal should be final and seems to me a much, much better deal.
Nicolet 310, 3091, 4094, Pro Oscilloscope Data Utilities. - Page 1
Forum section: electronics / testgear

author: Sparc
author_rank: Contributor
timestamp: January 03, 2015, 02:25:26 am
content: I've had an old Nicolet Pro oscilloscope for a while now. Just today I thought to track down the software utilities for converting saved trace data. It seems Nicolet was bought out long ago, but their old web page is viewable through the Internet Archive. The Internet Archive is a fabulous resource, we're fortunate to have it. Its a bit nostalgic to view the web as it used to look.The Nicolet saves trace data in a WFT binary file format. It looks like the "utilities.exe" file has programs supporting the 310, 3091, 4094, and Pro series scopes. I've tried them and found it easy to convert a WFT file to ASCII and then load the converted file into a spreadsheet.Apparently, programs can be written and loaded on to the Pro series with a language called TACT. Unfortunately the TACT.zip file wasn't archived.I hope this will be useful to other owners of Nicolet oscilloscopes.https://web.archive.org/web/20010302090323/http://www.niti.com/downloads.htmlhttps://web.archive.org/web/20010430162927/http://www.niti.com/utilities_disk.htmlhttps://web.archive.org/web/20010502010418/http://www.niti.com/waveform_viewers.htmlDescriptions:view_wft.exeThis is a program used to display, zoom, measure, and plot *.WFT Nicolet waveforms on a PC. Reads *.WFT files directly.wavecnv.exeThis program converts Nicolet *.WFT or *.WFF files into ASCII files. Enables conversion of Nicolet files for importing into other software packages. This is a Windows program.wft_2flt.exeThis program converts Nicolet *.WFT files into ASCII files. Enables conversion of Nicolet files for importing into other software packages. This is a DOS program.

author: Sparc
author_rank: Contributor
timestamp: December 09, 2016, 05:24:10 am
content: I looked again. Apparently there were tact sample programs archived.https://web.archive.org/web/19981205045036/http://www.niti.com/frames.htmlhttps://web.archive.org/web/19981205034611/http://www.niti.com/software/tactsubs.exe
Request for Fluke 77 IV service manual - Page 1
Forum section: electronics / testgear

author: dardosordi
author_rank: Regular Contributor
timestamp: December 07, 2016, 09:17:48 pm
content: Hey guys,I've bought a Fluke 77 IV used of ebay and its in good working condition but I would like to have the service manual and Im unable to find it. I was able to get the 77III service manual but not the 77IVIf someone knows where I can download it I would appreciate the link very much, thanks!

author: retiredcaps
author_rank: Super Contributor
timestamp: December 07, 2016, 10:47:31 pm
content: There is no publicly available service manual that has schematics, bill of materials, etc for any current selling Fluke handheld multimeter with the exception of the Fluke 17B schematic leaked onto the Internet.

author: dardosordi
author_rank: Regular Contributor
timestamp: December 08, 2016, 09:11:52 pm
content: Thanks! Those bastards, now I like my old 75 more!
Keisoku LN-300A-G7 control over USB - Page 1
Forum section: electronics / testgear

author: Gecko
author_rank: Contributor
timestamp: December 08, 2016, 05:49:59 pm
content: Does anybody have experience with the Keisoku LN-300A-G7 electronic load?It has a USB port and comes with a Labview based Windows GUI which can control the Instrument. But I'd like to control it as part of some lab automation routines with python (pyvisa)Documentation is pretty much not existent for non-Japanese(?) speakers.It does not follow any standard like SCPI or IVI or USBTMC:/I can connect to it with pyvisa (it's a USB RAW device). And I can also query the '*IDN?' Command and get the device identification string, so basic communication works. But that's about it, no other commands that the SCPI standard specifies for this device class (electronic load) is understood.

author: plesa
author_rank: Frequent Contributor
timestamp: December 08, 2016, 07:01:40 pm
content: Did you try to log the commands from program you mentioned in NI MAX?
Fluke PM3084 service manual found! (100MHz scope) - Page 1
Forum section: electronics / testgear

author: Hydrawerk
author_rank: Super Contributor
timestamp: June 12, 2013, 06:18:44 pm
content: Hello,I am looking foruser manualandservice manualforFluke/ Philips 4×100MHz oscilloscopePM3084.Photos arehere.I could not find any manual for free download.

author: Hydrawerk
author_rank: Super Contributor
timestamp: June 12, 2013, 06:30:14 pm
content: I found theusermanual somewhere athttp://www.fluke.com/fluke/czcs/support/manuals/default.htm

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 06, 2013, 03:34:27 pm
content: Theservice manual for Fluke / Philips PM3084PM3082 PM3092 PM3094 can be found here.http://uloz.to/xJyoHVt7/pm3084-pm3082-pm3092-pm3094-fluke-philips-oscilloscope-service-manual-pdf

author: zaoka
author_rank: Frequent Contributor
timestamp: September 06, 2013, 04:03:45 pm
content: Whats wrong with it?I had that scope for over 10 years never had any problems except loose probes.

author: DeuxVis
author_rank: Newbie
timestamp: December 07, 2016, 09:29:18 am
content: Direct link :http://assets.fluke.com/manuals/PM3082__umeng0000.pdf
Peaktech vs Owon rebrands - Page 1
Forum section: electronics / testgear

author: JanJansen
author_rank: Frequent Contributor
timestamp: December 06, 2016, 03:51:40 pm
content: Hi, i was looking to a Peaktech scope, i readed in this forum : Peaktech are rebranded Owon scopes.Does anyone know the exact type numbers that are rebranded ?, so i can compare the prices.The Owons seem to be cheaper for the same thing, just to be sure i would like to compare before buying.In the digital scope chart there is no Peaktech, maybe it would be nice to have a rebrand chart also ?Anyone knows if these Owon/Peaktech scopes are worth the money ?, do they have good rotary encoders and pushbuttons ?thanks in advance