hybridfree/eevblog-posts huggingface dataset:
Rigol DS4000 option bundle at TEquipment... - Page 1
Forum section: electronics / testgear

author: alank2
author_rank: Super Contributor
timestamp: May 08, 2015, 04:27:53 pm
content: Hi,Just a heads up for anyone wanting to purchase official options for their MSO/DS4000 series. I received an email from TEquipment that they are bundling CAN/RS232/Serial/Flexray into a single price of $605. You can probably save off of that using the discount code for the forum. They are saying that all the options added individually are valued at $3190.Also part of the email is that they are offering bandwidth upgrades for sale on this series as well.Good luck,Alan

author: TooOldForThis
author_rank: Regular Contributor
timestamp: May 08, 2015, 11:45:08 pm
content: For $5775.00 you can get a license key to upgrade your MSO/DS4000 from 200MHz to 500MHz. (BW2T5-MSO/DS4000)Don't everyone shove to the front of the line. They have enough of these licenses to meet demand.

author: IDEngineer
author_rank: Super Contributor
timestamp: December 07, 2015, 11:44:04 pm
content: Both of those deals are also available straight from Rigol.It's annoying - I gave my money to Rigol one month too early. If I'd waited, I'd have a 350MHz scope instead of a 200MHz one. Grrrrrrrrrrrrrrr......
Trouble reading inductance of copper coil using Extech LCR Meter 380193 - Page 1
Forum section: electronics / testgear

author: C3Theo
author_rank: Newbie
timestamp: December 03, 2015, 04:27:23 pm
content: I'm having trouble measuring the inductance on all the copper coils I've made using an LCR meter. I thought at first that it was because I was measuring the coils without applying current to the inductor, but this is a passive LCR meter and the manual states that all DUT's should be powered down before testing. I believe there's something wrong with my coils, because I've tested several commercial antennas and get a reading. I've tried several handmade coils now and can't get a reading out of any of them, and I'm not sure how else to troubleshoot this. I have an Oscillocope and function generator, but I'd like to use the LCR meter since I've already purchased it.

author: cyr
author_rank: Frequent Contributor
timestamp: December 03, 2015, 04:32:29 pm
content: Maybe a silly question, but are you sure you are getting a good connection to the wire? Stripping insulation like that can be tricky... Hard to tell from the picture.

author: C3Theo
author_rank: Newbie
timestamp: December 03, 2015, 04:32:36 pm
content: Here's pics of the meter picking up a reading with commercial antennas

author: cncjerry
author_rank: Unknown
timestamp: December 03, 2015, 04:33:07 pm
content: you scraped or burned the insulation off the magnet wire, right? I assume you get conductivity with an ohm meter?

author: Rupunzell
author_rank: Frequent Contributor
timestamp: December 03, 2015, 05:27:31 pm
content: There will be significant error due to the long test leads connecting to the coil under test.Put the test coil directly at the LCR meter with the shortest connection possible.BerniceQuote from: C3Theo on December 03, 2015, 04:32:36 pm

author: C3Theo
author_rank: Newbie
timestamp: December 03, 2015, 05:29:05 pm
content: That was the problem. I didn't get all the enamel off when I scraped it with an exacto knife. Used soldering iron and now it works. I'll shorten the test leads as well. Thanks!
agilent DSO-X 2002a, knobs not working properly - Page 1
Forum section: electronics / testgear

author: wiss
author_rank: Frequent Contributor
timestamp: December 03, 2015, 04:40:08 pm
content: HiI have a few DSO-X 2002a at work.A few of them is starting to develop problems with the some knobs, the trig in one case and the cursor in another.I removed the cursor-switch-thingie and opened it up (picture). I expected some dust in there but no, seems clean.Now I want to clean it but there is some grease visible on the contacts, what kind of grease is this? Where could one get more? (within EU preferably).or:Does anyone know the where I could get replacement switch-thingies?
Rohde&Schwartz FSH-Z34 optical cable - Page 1
Forum section: electronics / testgear

author: kazam
author_rank: Regular Contributor
timestamp: December 03, 2015, 03:28:29 pm
content: Hi,I just bought a used FSH3 and inconveniently enough is uses a proprietary optically coupled serial interface cable, FSH-Z34.Anyone know where I can get one for cheap? There's one on eBay but it's expensive and shipping is outrageous.I really only need it for a software update so I'm thinking about soldering directly on the LEDs with some resistors in series but don't know if I want to risk it./K
HP E4437B Vector Signal Generator, replacement LCD? - Page 1
Forum section: electronics / testgear

author: kazam
author_rank: Regular Contributor
timestamp: December 03, 2015, 12:04:02 am
content: Hi,Just got an HP 4437B vsg, fully loaded with dual arb and extra signal memory. Great.Also has AWGN which is great for receiver testing.Everything works great but the LCD is a little dim. Common with these machines.Does anyone know a source to get a new one? Is it even possible to get a replacement TFT? That would be sweet.Thanks!/K

author: free_electron
author_rank: Super Contributor
timestamp: December 03, 2015, 12:32:22 am
content: most likely the same lcd as in the infiniium scopes.you can always swap the tube out.

author: kazam
author_rank: Regular Contributor
timestamp: December 03, 2015, 09:25:28 am
content: Right,I'll have to open it up and check the CCFL. Did find some complete assemblies but they go for $250 so that's a bit of overkill.Nice bit of kit none the less!/K

author: TheSteve
author_rank: Unknown
timestamp: December 03, 2015, 10:07:33 am
content: Check out this thread from a few days ago:https://www.eevblog.com/forum/testgear/hp-agilent-e4433b-esg-d-series-signal-generator-250khz-4-0ghz/

author: kazam
author_rank: Regular Contributor
timestamp: December 03, 2015, 10:37:07 am
content: Quote from: TheSteve on December 03, 2015, 10:07:33 amThanks, interesting. I did a search but somehow missed this. I will be ordering a new CCFL.
Manufacturing visual validation - Page 1
Forum section: electronics / testgear

author: Stonent
author_rank: Super Contributor
timestamp: December 02, 2015, 09:48:43 pm
content: Does anyone know if there's a device or company that makes a product that can look at an assembly via a camera and makes sure it matches a template?I had someone today ask about a way to validate all the correct devices were installed in a power distribution box. Since each part used is color coded, it seems like it would be simple to create some system that looks at the finished product and sees if the colors match a template.Such as Position A1 should have something Red, Position A2 has something green. Position A3 should be an empty socket. etc.

author: Stonent
author_rank: Super Contributor
timestamp: December 02, 2015, 09:54:16 pm
content: Update: I think I found somethinghttp://www.newtonlabs.com/auto_fuse.html

author: pascal_sweden
author_rank: Super Contributor
timestamp: December 02, 2015, 10:58:38 pm
content: Check out the technology from ICOS Vision Systems.They are now actually part of KLA Tencor:http://www.kla-tencor.com/Corporate-Releases/kla-tencor-announces-intent-to-acquire-belgiums-icos-vision-systems.htmlhttp://www.kla-tencor.com/products.html

author: H.O
author_rank: Frequent Contributor
timestamp: December 03, 2015, 07:02:39 am
content: Roborealmshould be able to do that easily. It, a SFF PC and a USB/Firewire/Ethernet camera will probably be a lot cheaper than any standalone vision system.EDIT: Or, if you're a programmer, you can look into using the OpenCV library.
Tektronix 106 Refurb - Calibration Question (60ns Delay) - Page 1
Forum section: electronics / testgear

author: Addicted2AnalogTek
author_rank: Frequent Contributor
timestamp: December 03, 2015, 01:16:41 am
content: I just finished fully restoring a worn down Tek 106 square wave generator and it is time to cal it. I have everything that I need except for the Tek Type 113 60ns delay box. That specific one is made out of RG-213/U with GR874 connectors.I cannot afford to drop a few hundred on a quality coaxial delay box right now and intend to build one to suit - unless generating the 60ns delay via a digital delay generator such as the Tektronix DD501 or BNC 7010 would suffice.I would rather spend $60 on something such as that than spend the same on building a single-purpose coax delay box.Anyone able to shoot me some tips here?

author: MadTux
author_rank: Frequent Contributor
timestamp: December 03, 2015, 02:39:03 am
content: What is the delay line used for? If it's used for pretigger of a sampler/fast CRO, you probably get away fine by buying some 60nsx20cm/ns => 12m of cheap RG58 and coiling it up. Higher quality coax delay lines are usually found in most higher end CROs to generate pretrigger signal. In old ones, it is usually modular with BNC on both ends, so you might be able to unplug it temporarily and use it for your purposes

author: Addicted2AnalogTek
author_rank: Frequent Contributor
timestamp: December 03, 2015, 03:10:57 am
content: It's used to check the Hi Amplitude output, check and adjust the + and - fast rise output. It's used in conjunction with a sampling scope to check the rise time and aberrations.Here's a picture of the setup from the manual:

author: Addicted2AnalogTek
author_rank: Frequent Contributor
timestamp: December 03, 2015, 03:21:40 am
content: Here's the pages of the manual which use the 60ns delay.According to the datasheets, I need almost 40ft if I use RG-213/U, and around 43ft if I use RG-58 (A or C).I can get some used 213 for $0.50 per ft right now and I would only need to buy one GR874 end for about $10. That's less than I can get the RG58 and ends for right now.But basically what you are saying is that I should stick with a coax delay unit for this application, correct?I'll try to find a deal on some decent RG58 so that I can actually use it for something later on if that is the case.
Circuitmate Universal Counter - Service Manual needed! - Page 1
Forum section: electronics / testgear

author: clockbiscuit
author_rank: Contributor
timestamp: December 05, 2015, 01:54:17 pm
content: So I recently scored a function generator and frequency counter while a workmate was explaining how old and useless some of the archived equipment was at a local mine site. The conversation went something like "you want it? - you can have it"...Awesome!So I was really keen on the function generator as my current sig gen is an absolute potato. And this unit worked flawlessly. I am totally stoked.</brag>But the frequency counter has some issues. I've had at her and cant find anything damming within the box; it is all very tidy and the voltage rails look normal. I was wondering if anyone would have a service manual knocking about for one of these or any good ideas where I can find one? Google has failed me as of yet.The unit is a Circuitmate "Universal Counter UC10". Looks like it is a Beckman Industrial/Emerson product circa 1988. I have attached a photo.

author: oldway
author_rank: Super Contributor
timestamp: December 05, 2015, 03:44:23 pm
content: Probably based on ICM7216...Internal picture and list of IC's should be fine.Even if you don't find the service manual, datasheet and application note of the ICM can help you.
Agilent 34461A Problems - Page 1
Forum section: electronics / testgear

author: FaultlineAudio
author_rank: Unknown
timestamp: September 18, 2014, 11:53:41 pm
content: I purchased a new 34461A in February 2014 and recently is has developed 2 different problems.1. Sometimes the screen will freeze and the keypad does not function.2. There will be a "Application Error" window that pops up and says "Application Torreys.exe encounter a serious error and must shut down"These problems existed with the original firmware that came with the meter and they still occur since the most recent firmware upgrade (although it may be happening slightly less frequently)I spoke with Agilent Customer Service and they said that there may be a problem with the connection from the front panel, he didn't seem to familiar with the 34461A.The meter is under warranty and I may have to send it to a Service Center for repairHas anyone else had these types of problems?ThanksChris

author: LabSpokane
author_rank: Super Contributor
timestamp: September 19, 2014, 03:43:23 am
content: Any particular mode or condition that this occurs in so that we could try to replicate it?

author: FaultlineAudio
author_rank: Unknown
timestamp: September 19, 2014, 03:02:22 pm
content: Not really, The meter is typically powered on for 6-8 hours per day. Either problem can occur at any time or several times a day.Chris

author: LabSpokane
author_rank: Super Contributor
timestamp: September 19, 2014, 04:03:08 pm
content: I wonder if Keysight would cross ship you a replacement. Please post how it turns out.

author: mbartel
author_rank: Newbie
timestamp: December 02, 2015, 03:37:40 pm
content: This apparent bug is happening because LAN is enabled but the LXI service is offDo this to remove the Application error dialogPress Shift and then the Utility keysSelect I/O ConfigSelect LAN SettingsSelect LAN ServicesToggle VXI-11 from Off to OnSelect Done and repeat until you are back to the Home screenCycle Power
Maynuo M9742 and M9812 are supposed to be different models? - Page 1
Forum section: electronics / testgear

author: bubba198
author_rank: Contributor
timestamp: December 07, 2015, 06:48:42 pm
content: Hi,Maynuo M9742 and M9812 are supposed to be different models? If so why is then Amazon selling them exactly at the same price point?Am I missing something? I read the forum carefully and it seems that the 9812 is dubbed as a higher quality model which is why I am a bid confused by Amazon's decision:

author: Pinkus
author_rank: Frequent Contributor
timestamp: December 07, 2015, 11:05:18 pm
content: You mean M9712 and not M9742, don't you?I cannot compare as I do not own both, but I own a M9712 and checked it out and it is all perfect inside. It does not look as somebody was saving pennies by using dubious parts. The M9812 does have a different firmware as it offers also some LED mode. Probably it is otherwise identical. I can recommend the M9712.

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: December 08, 2015, 12:11:30 am
content: For unknown reasons, the M9812 is sometimes even cheaper to get than the M9712. Maybe/probably because the M9711/M9712 is better known!?Spec wise they are more or less the same, internals look the same, PC software is the same.The only difference seems to be the "LED mode" (which is not actually described in the manual apart from that it exists) and the slightly lower short circuit resistance specification of the M9812.Both use the same transistors, both have the same maximum current slope of 2.5A/µs.Someone claimed the Maynuo support said the M9812 had slower edges but I guess they tried to describe what the LED mode is for. Either that or the manuals are wrong.BTW: to whom it may concern:DYI isolated RS232/USB adapterthat can be used for the Maynuo M9812.

author: georges80
author_rank: Frequent Contributor
timestamp: December 08, 2015, 12:35:46 am
content: Another isolated USB option with less 'frills'.https://www.eevblog.com/forum/testgear/maynuo-electronic-load-serialusb-isolator/msg660142/#msg660142cheers,george.

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: December 08, 2015, 01:15:02 am
content: Hey, these are options, not frillsFor the Maynuo loads, you can leave the DC/DC and the 3.3V regulator unpopulated and place the jumper J4 to take the voltage from the connector pin 1.Then again, with the DC/DC and the 3.3V regulator it can be used as general converter, not only for Maynuo loads.

author: georges80
author_rank: Frequent Contributor
timestamp: December 08, 2015, 01:31:37 am
content: Options, ah, okI was going for a small solution so it would easily fit in some heatshrink tubing and sit 'under' my m9812 - then I can just plug in a USB cable when I need it. So, my version is the no frills/stripped implementation...The software that comes with the Maynuo isn't bad, the battery load test is pretty useful.cheers,george.
Kepco JQE 25-4M modification - Page 1
Forum section: electronics / testgear

author: biotron345
author_rank: Contributor
timestamp: December 01, 2015, 06:45:30 pm
content: Recently got one of these really cheap. I'm considering adding a digital meter. I had one lying around and tested it - appears to work. Is this a sensible mod? Also I'm a bit puzzled about the patchbay of screws on the back. Can anyone shed any light on this?

author: Teste
author_rank: Newbie
timestamp: December 01, 2015, 10:00:00 pm
content: If you want to measure voltage and the voltimeter impedance is high enough, there is no problem to install a digital voltimeter on our PSU.Kepco also sells these JQE power supplies with digital voltmeter + ammeter readouts.You can download the Kepco Service manual on these links: (however there aren't for your power supply model - JQE25-4M - a "similar" should be JQE55-2)http://exodus.poly.edu/~kurt/manuals/manuals/Other/KEPCO%20JQE55-2%28M%29%20Instruction.pdfhttp://exodus.poly.edu/~kurt/manuals/manuals/Other/KEPCO%20JQE36-15%28M%29%20Instruction.pdfhttp://physics.ucsd.edu/neurophysics/Manuals/Kepco/JQE%206-22M.pdfhttp://mmrc.caltech.edu/MPMS/Manuals/Kepco%20JQE6-45M.pdf
DS1054Z SPI trigger isn't working as expected - Page 1
Forum section: electronics / testgear

author: NRoach44
author_rank: Contributor
timestamp: December 03, 2015, 02:31:15 pm
content: Hi again!I'm screwing around with the Arduino Uno and I want to connect it to a MCP2515 so I can listen in on my car's CANBus.I've set the trigger settings as follows:Type: SPISCL: CH1 (Connected to 13 on the arduino)SDA: CH2 (Connected to 11 on the arduino)When: TimeoutTimeout: 3us (Just a value that should work)Data: LLLL LLLLEdge: RisingSweep: NormalThe issue is that in this setup the scope will trigger on any SPI packet, not just 0x00. If I set the trigger to anything other than 0x00 it will not trigger, even if I know that value is being sent out.Also interestingly enough, if SDA is set to the same input as SCL, the behavior doesn't change (but it can't be set to an unused channel)I'mhopingI'm doing something wrong here.I'm running Version 00.04.03.SP2Thanks!

author: NRoach44
author_rank: Contributor
timestamp: December 03, 2015, 02:36:24 pm
content: I'm an idiot.As you should be able to see, the trigger is way off the 5v in that screenshot.If I set the right data to trigger onANDset a voltage threshold that's valid it works as expected.
Latest Rigol Ultra Sigma Software - Page 1
Forum section: electronics / testgear

author: JohnPen
author_rank: Regular Contributor
timestamp: December 01, 2015, 11:52:24 am
content: I have just downloaded the latest Ultra Sigma 00.01.06.01 (dated 25-11-15) and installed it on a Windows 10 PC. This new Ultra Sigma application stalls, tries to start but never makes it, and my only solution has been to uninstall it and re-install the 00.01.06.00 version which works OK. I went round the loop a couple of times with no joy. Has anyone else tried this new version?

author: Marcos
author_rank: Contributor
timestamp: December 01, 2015, 03:14:00 pm
content: Where did you get it because it's not available on their website (US or European one)Did they said that it's compatible with Windows 10 ?Edit: well I found it into an obscure linkhttp://beyondmeasure.rigoltech.com/acton/attachment/1579/u-0003/0/-/-/-/-/

author: JohnPen
author_rank: Regular Contributor
timestamp: December 01, 2015, 03:42:36 pm
content: I found it on the Beijing Rigol Technology site see below. Google translate helps!http://rigol.com/Support/SoftDownload/2I am back on 00.01.06.00 having given up with the 00.01.06,01. Perhaps your download may work I will wait and see how you get on!John

author: Marcos
author_rank: Contributor
timestamp: December 01, 2015, 05:27:30 pm
content: It was pretty straight.Installed, restarted computer, run it without issues.I just wanted to see if it will start or not. Haven't tried yet a connection with my scope.

author: JohnPen
author_rank: Regular Contributor
timestamp: December 01, 2015, 07:02:48 pm
content: Marcos,I tried again downloading from the link you provided with the same result. I have now gone back to the 06.00 version again. You didn't say whether you were on Win 10 otherwise I must have something hiding in my PC that doesn't agree with the 06.01 version. Do you perhaps know of a release note for the 00.01.06.01 of Ultra Sigma?John

author: Marcos
author_rank: Contributor
timestamp: December 01, 2015, 07:20:02 pm
content: Sorry I forgot to mention. Yes, I'm on windows 10 too.I couldn't find yet a release note for it but if I remember well some notes are available when the setup is started.My advice is to check your installed programs and remove all those who are related with your previous installation. I mean IVI drivers, NI stuff a.s.o.
GW Instek product quality - Page 1
Forum section: electronics / testgear

author: Gary350z
author_rank: Regular Contributor
timestamp: December 01, 2015, 08:28:34 am
content: Dave recently tore down the GW Instek GDS-1104B oscilloscope.I was wondering what does everyone think about the overall quality of GW Instek products.The reason I ask is I have a new GW Instek SFG-1013 DDS Function Generator and allthough itworks OK, the top of the case gets very hot which means the parts inside are even hotter, whichdoes not give me a very good feeling.

author: TimNJ
author_rank: Super Contributor
timestamp: December 01, 2015, 06:09:31 pm
content: I also don't have too much to base my opinion off of, but I think they are "reputable enough" for a home workbench and non mission critical commercial/industrial work. I have a GFG-8020H function generator and it's pretty good for a basic analog generator. I replaced all of its electrolytic caps because it was used (unknown usage) and a decade old or so, but it probabaly didn't need that.

author: fivefish
author_rank: Frequent Contributor
timestamp: December 01, 2015, 06:30:58 pm
content: I have an 8219A... lots of features in a small box. I got this several years ago... An "upgrade" from my eBay Tenma generator. Paid good sum for the GWInstek compared to the eBay-find generator.I am sorely disappointed in it because the frequency counter jumps all over the place, not so stable.I guess its better than nothing. It'll do, gets the job done but nothing to brag about. As I said, it's better than nothing.
Siglent SDG1025 Conmbine Ch1+Ch2 - Page 1
Forum section: electronics / testgear

author: bitbo
author_rank: Newbie
timestamp: December 01, 2015, 01:38:13 pm
content: Hi !I need to locically AND Ch2 output with Ch1 but still need Ch1 separately(see attachment)Does someone know of how to do this?Thanks in advancebitbo

author: nctnico
author_rank: Super Contributor
timestamp: December 01, 2015, 02:13:43 pm
content: You should be able to use channel 1 connected to the trigger / gate input and use that to 'gate' (enable) channel 2.
old lytic capacitors adapters - Page 1
Forum section: electronics / testgear

author: dan3460
author_rank: Frequent Contributor
timestamp: December 02, 2015, 03:00:10 am
content: I remember seeing a pcb mount that fit old style can caps holes on the pcb that will take modern lytic caps.I did a google search but could not find the right ones. Does any one know where to get them?

author: MarkL
author_rank: Unknown
timestamp: December 02, 2015, 03:15:45 am
content: dave_k recently did a post on adapters he designed and had made:https://www.eevblog.com/forum/testgear/tektronix-76037613-repairs/msg743296/#msg743296Design files are available if you read through the thread.
Tektronix PS2520 triple output power supply repair and calibration - Page 1
Forum section: electronics / testgear

author: feedback.loop
author_rank: Frequent Contributor
timestamp: November 29, 2015, 06:03:43 am
content: Check out this video. These supplies aren't bad at all. Two channels 0-36V up to 1.5A, the third channel 0-6V up to 3A. I saw good ones on eBay for less than $150.It turned out this supply needed a fuse, a DAC, and a calibration.https://youtu.be/q3bn7r77yDY

author: siggi
author_rank: Regular Contributor
timestamp: November 29, 2015, 04:11:01 pm
content: I recently bought one of those. Mine needed a lot of TLC.There was shorted logic on the display board, which took out the rectifier and fuse. Some of the optos weren't making grade on the current transfer ratio, and didn't make the logic thresholds on the far end. There was a broken schmitt trigger on one of the channels, and all the DACs were bad (shorted gate to source).I found it ... interesting .... to find damage across all four galvanically isolated domains in the thing.Sent from my iPad using Tapatalk

author: Len
author_rank: Frequent Contributor
timestamp: November 29, 2015, 05:29:25 pm
content: At 11:05 do I see you using an unlicensed copy of DaveCAD(TM)?

author: feedback.loop
author_rank: Frequent Contributor
timestamp: November 30, 2015, 08:36:21 pm
content: Quote from: siggi on November 29, 2015, 04:11:01 pmSounds unbelievable. What are the chances of so many components failing at the same time? It must have been struck by lightning.

author: siggi
author_rank: Regular Contributor
timestamp: December 01, 2015, 02:19:40 am
content: Quote from: feedback.loop on November 30, 2015, 08:36:21 pmYeah, go figure.It didn't look like it had been repaired or boards swapped either. All the pass elements were fine, and it calibrated right up after I fixed that litany.Sent from my iPad using Tapatalk
BSIDE BTM01 thermcouple meter - Page 1
Forum section: electronics / testgear

author: Circlotron
author_rank: Super Contributor
timestamp: November 23, 2015, 11:37:24 am
content: http://aud.dx.com/product/bside-btm01-1-77-2-channel-temperature-meter-thermometer-w-k-type-thermocouple-probe-blue-grey-961401367Would like some opinions on this thing.Only looking for something simple for 1/ setting temperature of soldering iron tip 2/ measuring air conditioner outlet temps. Described as 2-channel but obviously it's not, with only 1 connector. Also, what is the thing next to the connector? An ambient temp sensor?

author: Vgkid
author_rank: Super Contributor
timestamp: November 23, 2015, 02:23:09 pm
content: It looks like 1sensor is internal to the unit.

author: vector31337
author_rank: Newbie
timestamp: November 30, 2015, 02:43:59 pm
content: Yes it says right there that it will display ambient temperature when there is no thermocouple plugged in.

author: Circlotron
author_rank: Super Contributor
timestamp: November 30, 2015, 08:17:02 pm
content: So it does. Thanks for that.
U1780A specification  - Page 1
Forum section: electronics / testgear

author: rgawron
author_rank: Contributor
timestamp: November 30, 2015, 01:00:15 am
content: I'm looking for below information about U1780A (wall-socket power supply for a family of Keysight LRC meters):- output voltage.- maximum output current.- socket type to plug it into the powered device.I couldn't find it (and also any datasheet for this particular device in general).It seems to be just a regular power supply, but it's price is overly expensive.

author: kaz911
author_rank: Super Contributor
timestamp: November 30, 2015, 04:08:20 pm
content: 12v/3a/center positive - made by DVE

author: rgawron
author_rank: Contributor
timestamp: November 30, 2015, 04:34:11 pm
content: Thank you very much for both replies!
Difference between Rigol DP832 and DP832A - Page 1
Forum section: electronics / testgear

author: LeoUCDavis
author_rank: Contributor
timestamp: November 30, 2015, 07:03:57 am
content: The two models look almost identical. With the high resolution option, the DP832 has 1mV/1mA setting resolution so it's almost the same as the 832A with a much lower price?

author: Howardlong
author_rank: Super Contributor
timestamp: November 30, 2015, 07:21:21 am
content: Quote from: LeoUCDavis on November 30, 2015, 07:03:57 amThe A version has firmware that actually uses the colour screen, although that UI is somewhat different and has been derided as the base 832 is more straightforward in its presentation.The base 832 has a colour screen, bit it's used only in a single colour. You can change that colour if you want.

author: nbritton
author_rank: Frequent Contributor
timestamp: November 30, 2015, 10:06:59 am
content: Quote from: LeoUCDavis on November 30, 2015, 07:03:57 amIt's my understanding that they both use the same internal hardware and that it can be hacked.

author: Stupid Beard
author_rank: Regular Contributor
timestamp: November 30, 2015, 01:00:31 pm
content: Aside from the display differences that Howard mentioned, the DP832A is basically a DP832 with all options enabled. There's no need to hack it.
Used Fluke 179 is it worth it? - Page 1
Forum section: electronics / testgear

author: Kakashi
author_rank: Contributor
timestamp: November 30, 2015, 02:51:44 am
content: Got an offer for used Fluke 179 for 155$, so is it worth it? The price is only for the multimeter without any accessories or probes.Currently where I live the same fluke has a price of 410$ brand new. Don't know if I should pick it up...

author: lowimpedance
author_rank: Super Contributor
timestamp: November 30, 2015, 03:37:39 am
content: Depends on whether it has what you need etc. (do you have more DMMs?). Is it in good shape , no abuse either physical or 'electrical'. If you really want it go for it but if still in 2 minds maybe you dont really need it.Remember you will need to spend on leads too.edit and OT ....500th post ...........only took just under 5 years !!.

author: elCap
author_rank: Regular Contributor
timestamp: November 30, 2015, 04:32:08 am
content: If you're into electronics it's good as a second meter. I'm currently considering to buy one myself (but will probably go for a Brymen). I don't think it's good as the main meter for electronics as it lacks in some areas, e.g. current measurement.My experience in used equipment in Japan is that they are quite abused, a lot of scratches, dirt, smell cigarette smoke, and so on. I try to avoid used if I can.Have you checked Rakuten or Yahoo Auction? Best price of new Fluke 179 is about 34000yen (US$277). At Yahoo Actions there is one available with some kind of test leads, asking 14900yen (US$122).(edit: 100th post! Only 4.5 years)

author: retiredcaps
author_rank: Super Contributor
timestamp: November 30, 2015, 06:25:56 am
content: Quote from: elCap on November 30, 2015, 04:32:08 amAll the Fluke 170 series measure current. A and mA, but not uA.
HP 8568B Compress command - Page 1
Forum section: electronics / testgear

author: cncjerry
author_rank: Unknown
timestamp: November 29, 2015, 11:09:03 pm
content: Does anybody have experience with the Compress command on the 856X Spectrum analyzers? I assume you can only use it from GPIB? I've seen examples of 3 plots on one screen and though I could do the same with a Labview or Visual Basic application, I would like to take a crack at using the analyzer.From the simple example I read, it looks like you can compress the trace and store it into one of the trace memories like A,B,C. I don't see an example of where you then position the traces on the screen.I picked up a beautiful 8568B about a month ago to supplement my Advantest portable analyzer. Over the weekend I was able to find the RF preselector (85685a) again for what I thought was a good deal. In reading thru some of the lit I found the multiple trace screens somewhat interesting for an old box like this.Thanks
Silent Equipment - Page 1
Forum section: electronics / testgear

author: luky315
author_rank: Regular Contributor
timestamp: November 28, 2015, 12:31:28 pm
content: I'm a bit sensitive to noise and therefore looking for a silent scope and power supply. I have a Rigol DP832 and its fan is loud even when idling and I'm also not happy with the noise the DS4024 Scope makes.Are there silent scopes and lab supplies out there?

author: mehdi
author_rank: Regular Contributor
timestamp: November 28, 2015, 02:25:18 pm
content: I've got a R&S (Hameg) HMO1002 and these are fanless, so nothing there to make noise

author: Stupid Beard
author_rank: Regular Contributor
timestamp: November 28, 2015, 02:38:04 pm
content: Quote from: luky315 on November 28, 2015, 12:31:28 pmThere is the option of replacing the fans. I've been seriously considering doing that with my DP832, but I don't want to void the warranty so I've been avoiding it.

author: nowlan
author_rank: Frequent Contributor
timestamp: November 28, 2015, 03:47:43 pm
content: https://www.eevblog.com/forum/testgear/fanless-dso/also the slower siglent sdg805 (810?) are fanless function generators. Old Analogue ones would be silent too.
Practical books about DSO and Spectrum Analyzer - Page 1
Forum section: electronics / testgear

author: pascal_sweden
author_rank: Super Contributor
timestamp: November 28, 2015, 01:15:10 pm
content: Are there any good practical books out there to fully learn all the features of DSO and Spectrum Analyzer?The books do not have to cover both the DSO and the Spectrum Analyzer.Two separate books will do.I am looking for new and practical books on this subject matter.If one would manage to include the background theory and the practical use in one book, and base the practical use cases on the Rigol DS1054Z and the Rigol DSA815-TG, chances would be high it would become a bestseller

author: mehdi
author_rank: Regular Contributor
timestamp: November 28, 2015, 03:03:27 pm
content: I haven't read any books specifically about oscilloscopes or spectrum analyzers, but there is a book called "Oscilloscopes for Radio Amateurs" which I think is for ARRL.Maybe can help you.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: November 28, 2015, 03:14:34 pm
content: Quote from: pascal_sweden on November 28, 2015, 01:15:10 pmYes, there is one, at least for spectrum analysis:C. Rauscher - Fundamentals of Spectrum Analysishttp://www.ictregulationtoolkit.org/Documents/Document/Document/3588Mr. Rauscher is one of the spectrum analyzer gurus at Rohde & Schwarz.I haven't seen any good book for scopes, though. Almost everything I saw was based on analog scope, and even the ones that have been updated to include DSOs pretty much keep their analog scope approach to using them.
Solartron 7081 DMM GP-IB programming getting no response - Page 1
Forum section: electronics / testgear

author: KSP
author_rank: Regular Contributor
timestamp: November 27, 2015, 12:25:57 pm
content: Hi allI'm trying to write a calibration/verification routine for a 7081 DMM, but I can't seem to get it talking. It will listen just fine, Using NI-MAX's 488.2 Communicator I can send it individual lines of commands and I am able to set up ranges etc. but I cant seem to figure out how to get a response. With modern SCPI instruments the setting and result are different commands (i.e. "RANGe:VOLT DC" being the setup, and something like "FETch?" to acquire the result) but the commands for this seem to just set up the measurement samples, but not output anything. Am I missing a termination character or something? I'm setting the range with "MODe,VDC" and measurement single measurement using "MEAsure,SIngle", which are received by the unit just fine and I can see the reading on the display, but it returns no result to my PC. And querying using "MEAsure?" should return the measurement type (i.e. SIngle) but this returns nothing either, just a time-out error.I've checked the rear of the instrument and the DIP switches for Listen Only and Talk Only are both off, beaning it should listen and talk.Any ideas?

author: 3roomlab
author_rank: Frequent Contributor
timestamp: November 27, 2015, 12:43:57 pm
content: i saw this nice solartron website, maybe you can checkhttp://www.perdrix.co.uk/Solartron7081/index.htmgee whiz, all the used solartron under $2k are gone !were you one of them buyers?i hope to get 1 btw**edit : mickle T is a 7081 owner, PM him(dmm noise thread #65)

author: KSP
author_rank: Regular Contributor
timestamp: November 27, 2015, 12:51:57 pm
content: ThanksI skimmed through that site earlier and it is all about the repair from what I could see, whereas I'm 90% certain the meter is fine and I'm just programming it wrong.And no I didn't purchase this meter used, we have had it since new and I just dug it out from the pile in an attempt to find a use for it. Believe its from an old ATE test set which got decommissioned years ago

author: picburner
author_rank: Frequent Contributor
timestamp: November 27, 2015, 05:31:21 pm
content: For get answers from my 7081 I had to set:DELI=END page 3.13 User ManualandOUTPUT,GP-IB,ON page 3.37 User Manual

author: KSP
author_rank: Regular Contributor
timestamp: November 28, 2015, 09:12:24 am
content: Perfect! Seems to have worked nicely

author: KSP
author_rank: Regular Contributor
timestamp: November 28, 2015, 09:13:05 am
content: Thank you very much!
Amprobe AM-530 multimeter - Page 1
Forum section: electronics / testgear

author: JGAN
author_rank: Contributor
timestamp: November 28, 2015, 03:49:43 am
content: I'm looking to get a new sub $100 multimeter. I saw tequipment has thisAmprobe AM-530which seems like a good multimeter from a name brand, and even has some nice features such as a bar graph and temperature measurement. Has anybody used it? Does it have latch continuity testing? Overall thoughts?

author: retiredcaps
author_rank: Super Contributor
timestamp: November 28, 2015, 04:33:19 am
content: Quote from: JGAN on November 28, 2015, 03:49:43 amThere is a whole series of 5ky videos discussed here on the forum and one of them is the AM-530.
Multimeter reliability and safe use over 3600 meters above sea level ? - Page 1
Forum section: electronics / testgear

author: HangarAndino
author_rank: Newbie
timestamp: November 27, 2015, 08:34:02 pm
content: Greetings from Bolivia, South America.I was serching for a good multipurpose multimeter, but all are rated at a top working altitude of 2000 meters, and my beloved city is above 3600 meters.So my question is how trustworthy and safe would be to use one of those multimeters at this height?Do you know a multimeter with a higher altitude rating ?Thanks for the help.

author: Someone
author_rank: Super Contributor
timestamp: November 27, 2015, 09:40:50 pm
content: Keysight have their standard altitude specification up to 3,000m and some of their military products are specified to 30,00ft. Beyond that you would derate the voltage rating, and possibly have some loss of accuracy. The data is usually presented in the Paschen curve, and the slope in that region of the graph suggests much less than a factor of 2 derating.

author: Lightages
author_rank: Unknown
timestamp: November 27, 2015, 11:44:52 pm
content: The main concern is for the safe voltage rating. As already said the maximum voltage should be de-rated. I am in Chile and live at 2500m, not quite as high as you do. I don't think accuracy would be affected much if at all. Here is how you derate, from a document on measurement standards:
ISO-Tech LCR-1701 teardown and review - Page 1
Forum section: electronics / testgear

author: Deckert
author_rank: Regular Contributor
timestamp: November 27, 2015, 08:15:27 am
content: Hi guys,After some thought and research on which handheld LCR meter to get, I finally settled on the ISO-Tech LCR-1701 meter. I had a look at the DER EE DE-5000, but after shipping and duties into South Africa it would have cost a lot more than the one I got from RS.I did a teardown and review of the meter here, for what it's worth:Measures up to 20mF, but more importantly down to 10fF and has a 1 milli-ohm resolution on the resistance scale.Note that it's an OEM from Appa (the Appa-701). It is also distributed by GWinstek as the LCR-915.--deckert

author: purpose
author_rank: Frequent Contributor
timestamp: November 27, 2015, 11:16:47 am
content: Nice review Mr. D.... Thanks.

author: crispy_tofu
author_rank: Super Contributor
timestamp: November 27, 2015, 11:00:50 pm
content: Fantastic, thanks for sharing! Subbed.
Ordering some gear, yay or nay - Page 1
Forum section: electronics / testgear

author: Reef_Stevens
author_rank: Newbie
timestamp: November 26, 2015, 11:34:33 pm
content: Going to order my first lot of testing gear. Does this stuff seem alright? Open to any suggestions, trying to stick to the approximate price of the listed components.DSO: Tektronix TSB1052Bhttp://au.element14.com/tektronix/tbs1052b/oscilloscope-2ch-50mhz-1gsps/dp/238321601PSU: TENMA 72-2540http://au.element14.com/tenma/72-2540/power-supply-1ch-30v-5a-prog/dp/244541201Cheers, Reef.

author: Howardlong
author_rank: Super Contributor
timestamp: November 26, 2015, 11:51:39 pm
content: Value for money, the Rigol DS1054Z is a far better investment as a scope in my opinion.The Tek is only 2 channels and has a miniscule 2.5k points for starters.Edit: typo.

author: rdl
author_rank: Super Contributor
timestamp: November 26, 2015, 11:53:00 pm
content: Almost everyone here is going to tell you to buy a Rigol DS1054z.That power supply is a re-badged Korad. You might be able to find the original Korad version at a lower price.

author: ataradov
author_rank: Super Contributor
timestamp: November 26, 2015, 11:53:28 pm
content: Are you buying Tektroinx just for the name? In all other respects it is way worse that the Rigol DS1054Z.

author: nctnico
author_rank: Super Contributor
timestamp: November 27, 2015, 12:30:48 am
content: I agree. Buy a DS1000Z, shell out a couple of thousand $ or buy something second hand.

author: Muttley Snickers
author_rank: Unknown
timestamp: November 27, 2015, 12:59:12 am
content: The price down here is almost the same between the Tektronix and the Rigol, the Rigol is currently the forums most recommended DSO for good reason, very hard to beat and available from Emona Instruments linked below.And if you are buying from Element 14 don't forget that you may be eligible for a bonus pictured below, they have indicated to us recently that a review of their pricing structure is being undertaken and are very keen to talk turkey on particular products.http://www.emona.com.au/products/electronic-test-measure/oscilloscopes/ds1054z.html#.Vlen0dIrIdU

author: Fungus
author_rank: Super Contributor
timestamp: November 27, 2015, 07:32:32 am
content: Quote from: Howardlong on November 26, 2015, 11:51:39 pm2.5k points is a deal-breaker IMHO. Simply not enough in 2015, eg. a DS1054Z has 5,000 times more memory than that (even without hacking - you can get even more by hacking!)Being able to record signals and zoom in is a fundamental feature of DSOs.

author: tautech
author_rank: Super Contributor
timestamp: November 27, 2015, 01:05:47 pm
content: If you have that sort of budget for a DSO and only want/need 2 channels this may interest you:http://www.triotest.com.au/shop/siglent/3816-siglent-sds1102x-digital-oscilloscope-100mhz-1gsas-2-channel.htmlApart from better basic specs it also has 400V rated channel inputs that offer better safety if you are doing any mains or SMPS primary side work.
Keithley 2015 vs hp 333a - Page 1
Forum section: electronics / testgear

author: Aztlanpz
author_rank: Regular Contributor
timestamp: November 28, 2015, 05:09:51 pm
content: What is the best product to measure thd from the keithley 2015 vs the hp 333a?Aztlan

author: deadlylover
author_rank: Frequent Contributor
timestamp: November 28, 2015, 06:06:12 pm
content: The Keithley looks to be better specced for THD if you only care about the audio band, -87dB (20hz-20khz) vs -70dB(5hz-200khz) for the HP 333a.I haven't used either one, but I'd probably lean towards the Keithley, it doubles as a 6.5 digit DMM.
siglent Sdg1025 tcxo  - Page 1
Forum section: electronics / testgear

author: Aztlanpz
author_rank: Regular Contributor
timestamp: November 26, 2015, 03:11:11 pm
content: What frequency of Tcxo do I need for my siglent Sdg1025?Thanks Aztlan

author: tautech
author_rank: Super Contributor
timestamp: November 26, 2015, 06:28:16 pm
content: Recent discussion on the last page of this thread:https://www.eevblog.com/forum/testgear/siglent-sdg1025-arbitraryfunction-generator-under-some-tests/
Which t15 tips do you recommend? - Page 1
Forum section: electronics / testgear

author: minho
author_rank: Newbie
timestamp: November 24, 2015, 07:39:22 pm
content: What are your favourite T15 tips for the Hakko FM203/FM2027 combination?Thanks

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: November 26, 2015, 06:08:19 am
content: Quote from: minho on November 24, 2015, 07:39:22 pmAnd that is related to Test Equipment in which way?Hint: there's a sub-forum for stuff like that. It's not this one.
Keithley is now part of Tektronix - Page 1
Forum section: electronics / testgear

author: dacman
author_rank: Frequent Contributor
timestamp: November 26, 2015, 03:01:27 am
content: http://www.tek.com/keithley

author: EEVblog
author_rank: Unknown
timestamp: November 26, 2015, 03:06:24 am
content: Same Danaher smell ether way.

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 26, 2015, 03:11:54 am
content: Dahner bought Keithley back 5 years ago. Is there new news?

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: November 26, 2015, 03:14:35 am
content: Hi,Don't worry, in May, Danaher announced that it is going to split into two separate companies:http://investors.danaher.com/2015-05-13-Danaher-Announces-Intention-to-Separate-Into-Two-Independent-Publicly-Traded-CompaniesVery similar Agilent / Keysight the T&M part will be spun-off.This is expected to complete by the end of 2016.Regards,Jay_Diddy_B

author: LabSpokane
author_rank: Super Contributor
timestamp: November 26, 2015, 03:17:33 am
content: This looks like they've done a "redundant" employee reduction and put Keithley under Tek's administrative structure. It's all part of the corporate death spiral. Holding companies like Danaher overburden a company with reporting and overhead, while milking it for all its worth, then punish the employees for the imposed inefficiencies by rightsizing them into unemployment.

author: EEVblog
author_rank: Unknown
timestamp: November 26, 2015, 03:25:07 am
content: Quote from: LabSpokane on November 26, 2015, 03:17:33 amIt's called the "Danaher Business System"http://www.icmrindia.org/casestudies/catalogue/Operations/OPER108.htm

author: EEVblog
author_rank: Unknown
timestamp: November 26, 2015, 03:26:06 am
content: Quote from: Richard Crowley on November 26, 2015, 03:11:54 amSounds like they are being put under one name and management structure now, instead of (mostly) two independent companies as they have been.

author: LabSpokane
author_rank: Super Contributor
timestamp: November 26, 2015, 05:33:38 am
content: Quote from: EEVblog on November 26, 2015, 03:25:07 amYup. And it's an OK way to milk a company with a very mature, static product like bearings for all it's worth. It's a horrible system for anything that requires constant innovation.
Fluke 5500a Calibrator repair , help with Fet IFC07703  ? - Page 1
Forum section: electronics / testgear

author: rickells
author_rank: Regular Contributor
timestamp: November 25, 2015, 06:37:27 pm
content: Fluke 5500a Calibrator repair, help with Fet or transistor IFC07703 ?Trying to solve some issues with a Fluke 5500a Multi Calibrator.Error codes on the A5 Impedance Synthesizer board:1049 & 1051Trying to find Fet part # IFC 07703 !! { listed as Q3 & Q4 in Fluke 5500a manual... no schematics either !! }in a TO-92 plastic package, also can't find data sheets for this Fet or transistor !thanks
IKALOGIC Store 10% Discount for ScanaQuad Logic Analyzer - Page 1
Forum section: electronics / testgear

author: caligula
author_rank: Newbie
timestamp: November 25, 2015, 08:33:34 pm
content: As I've read good things about the IKALOGIC ScanaStudio software in this forum, and i liked the idea of being able to generate logic patterns and capture the response at the same time, I have purchased their new ScanaQuad SQ200 product today (seehttps://www.ikalogic.com/scanaquad-logic-analyzer-signal-generators/for details).The ScanaQuad product is pretty new that is why I did not found a lot of hands-on experience on the internet. I will upload some unboxing photos when the Logic Analyzer has arrived.And maybe someone is interested that (as of today) the voucher code "GimmeScanaQuad" (-10%) seems to be still accepted by the IKALOGIC Store. That pushes the price down a bitA nice anecdote: My order number was double-digit ;-)