hybridfree/eevblog-posts huggingface dataset:
HAMEG HM 103 Oscilloscope problem - only get a single dot - no horizontal line - Page 1
Forum section: electronics / testgear

author: RaspberryPieman
author_rank: Newbie
timestamp: October 25, 2018, 02:27:47 pm
content: Hi,I have a HAMEG HM 103 Oscilloscope, which has been working fine for years.However, when I turn it on, now, I only get a single dot - no horizontal line.I can move the dot up and down using the Y-POS knob and from side to side using the X-POS knob.But if I try to view the normal square-wave by probing the 'cal' post, I now just get the non-moving dot.I have tried pushing in and out all the push-buttons and rotating all the knobs, to check for bad connections.I have downloaded the manual, but it does not have anything like this problem in its trouble-shooting guide.Does anyone have any suggestions on how to diagnose or fix this problem ?Regards,Martyn

author: jsantoro
author_rank: Regular Contributor
timestamp: October 25, 2018, 03:51:58 pm
content: Make sure it is not in XY mode. Look for a Horiz Ext button or maybe even on the timebase knob

author: alsetalokin4017
author_rank: Super Contributor
timestamp: October 25, 2018, 04:21:49 pm
content: I would think that the calibrator would produce a vertical line rather than a single dot, if the timebase is simply nonfunctional or turned off as in x-y mode.I'd try cycling the Hor. Ext. button a few times. Maybe spray some Deoxit on the contacts first.

author: nctnico
author_rank: Super Contributor
timestamp: October 25, 2018, 05:18:34 pm
content: Don't use contact sprays because these will dissolve metals in the long term. If the buttons don't work I'd start by taking the scope apart and reseating all connectors (unplug and then plug in again).

author: alsetalokin4017
author_rank: Super Contributor
timestamp: October 25, 2018, 05:58:52 pm
content: Don't use Deoxit because it dissolves metals? Whaaaaat?My 50 year old Tek scope begs to differ.

author: nctnico
author_rank: Super Contributor
timestamp: October 25, 2018, 06:32:38 pm
content: It is simple for contact sprays to work they must dissolve metals. What makes it worst is that the wiring will wick it everywhere else too. equipment + contact spray = FUBAR . I've seen it one times too many already.
fluke dmm authenticity - Page 1
Forum section: electronics / testgear

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: October 22, 2018, 03:10:14 am
content: few months back i got a new fluke 177 off myflukestore.com & just recently I noted there isn't the typical UL or VDE symbols on the back. This an authenticity issue? It also came with a 9v energizer installed. However its very accurate and it had the meter had the typical plastic peels and stuff on it. I noted this vid has the symbolshttps://youtu.be/qm3ZvcjiS9Y?t=483but its much older whereas mine was manufactured this year according to some docs which came with the meter. Also the serial on mine is a few digits shorter than the one in the video.

author: retiredcaps
author_rank: Super Contributor
timestamp: October 22, 2018, 03:36:29 am
content: I have been following Fluke hand held meters for several years now and to the best of my knowledge, there has never been any Fluke counterfeit meters.There are meters that have the yellow holster called Fuke, but never a fake outright copy.Some Asian manufacturers have used the Fluke lower end molds and similar casing, but they are not yellow colored and they use a different off the shelf IC chipset.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 22, 2018, 03:41:14 am
content: Without pictures it's really hard to say anything useful.

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: October 24, 2018, 12:03:37 am
content: fluke customer service replied by email and said its fine and authentic said they no longer put those symbols on the recent 177 models since they no longer use UL or VDE rather CSA is what they conform to.
GWInstek GDM 8251A, Is anybody using it to collect data? - Page 1
Forum section: electronics / testgear

author: JPortici
author_rank: Super Contributor
timestamp: October 21, 2018, 12:16:35 am
content: Hi, i have one of these bench multimeters. I'd like to connect it to my pc so i can log data and plot trends, but i'm not sure how to proceed.The meter itself has both RS232 and an USB port for communication (that i think is used as a CDC device)but the guys at GWI had probably one too many when designing the computer interface...- The RS232 port is a Male Type. I would have expected a female type, because all USB-232 cords i could find have a male plug, and IIRC my old computers with a serial port were always a male port.- For some reason they decided to put a dual type A receptacle (one is used for calibration, insert the calibration key) and the other is for communication.. the meter is using a Type A port as a Device. Strange.So, what do i need to connect the meter to my computer? I have a USB-232 but as i said the plug is a male type. Soo... female-female plug? open the meter, desolder the 232 male port and solder in a 232 female port? a type a - type a cable?Then , what software do you use to collect data? i was able to find the "official" software DMM-Viewer:http://59.120.26.36/en/download/downloadfilelist.aspx?id=196Sigrok doesn't support the meter according to the wiki

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 21, 2018, 12:19:57 am
content: The RS232 port is the same type as the one on the venerable 34401A. It's not very unusual and probably even the reason for that port to be on the GW-Instek.

author: nctnico
author_rank: Super Contributor
timestamp: October 21, 2018, 11:52:58 am
content: In general when dealing with RS232 ports you'll need a straight wired (1 to 1) between male / female and a crossed (NULL modem) cable between male / male.

author: LapTop006
author_rank: Unknown
timestamp: October 22, 2018, 07:54:21 am
content: Quote from: nctnico on October 21, 2018, 11:52:58 amBut it's RS232, so good luck.Picking up a breakout with LEDs can be particularly handy for figuring out the exceptions.I've taken to carrying DB9->RJ45 adapters intended for data networking, as well as a rollover RJ45->RJ45 (pin1->8, 2->7, etc.) combined with a normal Cisco console cable, and a USB-Serial I trust, with that combo I can talk to the vast majority of kit out there.
Fluke 345 PQ clamp meter issue - Page 1
Forum section: electronics / testgear

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: October 21, 2018, 08:43:30 pm
content: I was trying to measure the power of an induction heater with the power clamp attached to the induction coil and the clamp's jaw started giving funny reading then i stopped measuring the power and realized it was heating up the jaws and started smelling like burnt plasticNow it's reading a bit off (5.01 A instead of 5.32 A for example) could I have damaged the unit or will a re-calibration do the trick? The meter is under warranty anyway and there are no signs of physical damage.What to do?
Hold peak hp-870p power clamp meter  - Page 1
Forum section: electronics / testgear

author: R_G_B_
author_rank: Frequent Contributor
timestamp: October 27, 2018, 11:24:07 am
content: I have this power clamp meter it's around £40 on Ali expressIts Hold peak hp-870p it is true RMS power and energy Meter and by the looks of the display functionality it can do data logging and also thd measurements.I tested it against a fluke power quality analyzer readings are similar taking into account the clamp sensitivity spec i400s Vs peak hold clamp meterPower clamp meters can be very expensive this seems ok for the price better than nothinghttps://m.aliexpress.com/item/32885509774.html?trace=storeDetail2msiteDetail&spider=y
FLUKE 110 problem - Page 1
Forum section: electronics / testgear

author: djdanielb
author_rank: Newbie
timestamp: October 19, 2018, 03:45:55 pm
content: hi peopleI've got this testr that when I switch on continuity or ohm reading start with random valueIf I start beep it start if i put near positive tester it startsI've open itwhat could be checked ?Best regards

author: retiredcaps
author_rank: Super Contributor
timestamp: October 19, 2018, 07:25:38 pm
content: I have read your post 4 times and I still don't know what you are trying to describe or what is wrong.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 20, 2018, 01:34:36 pm
content: I would say1: meter put in ohms tests, the dislay fluctuates2: continuity test, he touch the leads ?@djdanielb your translation if it is : is hard to read and understandHave you read the user manual to help you use the meter ? ------------->http://assets.fluke.com/manuals/11x_____umeng0200.pdfQuestions:If you measure known values of resistances are the displayed values good ?If you dont have anything connected on the leads sometime an multimeter will read some picked interferences on the leads, they act as antennas.If you short them together, is the display gets to zero and stay at zero ?The continuity test : on this meter if the resistance value are less than 20 ohms, you will hear a beep

author: djdanielb
author_rank: Newbie
timestamp: October 21, 2018, 03:21:51 pm
content: Ok I try to explain betterIf I set in beep test ( short circuts ) and leave open the leads or i don’t plug it on multimeterAfter few seconds it starts to buzzer and random value appear on display ( value that decrease from 900 ohm )If display show OL and wothout leads I put near the leads holes it starts to beepI open the multimeter and seems that the metal shield near the “shunt” ( i’m not shure that it is a shunt) is ok but if I put my hand near starts to beepIn ohm resistance the value are negative ( but probably becouse need to be recalibrate.If I set DIOSE TEST works goods
Siglent SDS 1104X-E Sampling issue  - Page 1
Forum section: electronics / testgear

author: Moriambar
author_rank: Unknown
timestamp: October 21, 2018, 08:50:14 am
content: Hello, beginner here.I noticed that with two channels active the 1104x-e halves the sampling rate to 500M (and memory depth), although I thought that this would only happen with three or more active channels. What am I missing?Being a newbie sucks ass sometimes Firmware is updated to latest version.Cheers.

author: tautech
author_rank: Super Contributor
timestamp: October 21, 2018, 08:58:51 am
content: Quote from: Moriambar on October 21, 2018, 08:50:14 amWhen needing 2 channels at the max sampling rate and memory depth they each need to be used on each of the ADC's.So any combo of the following:1+3, 1+4, 2+3, 2+4.Using any 3rd channel will halve the mem depth and sampling rate.

author: Moriambar
author_rank: Unknown
timestamp: October 21, 2018, 09:01:24 am
content: Quote from: tautech on October 21, 2018, 08:58:51 amWow, thanks! I did not thin about this! I am happy I learned something!Cheers

author: tautech
author_rank: Super Contributor
timestamp: October 21, 2018, 09:07:03 am
content: Quote from: Moriambar on October 21, 2018, 09:01:24 amThis is the standard setup with dual interleaved ADC DSO's. Now you know and aren't likely to forget.Enjoy.Oh, and BTW, the memory is configured 14 Mpts times 2, that is, each ADC has 14 Mpts of memory support.

author: Moriambar
author_rank: Unknown
timestamp: October 21, 2018, 09:08:09 am
content: Yes indeed!

author: rf-loop
author_rank: Super Contributor
timestamp: October 21, 2018, 02:51:43 pm
content: Quote from: Moriambar on October 21, 2018, 09:01:24 am
R&S FSP38 - Page 1
Forum section: electronics / testgear

author: Omicron
author_rank: Regular Contributor
timestamp: October 20, 2018, 04:36:26 pm
content: I came upon a R&S FSP38 Spectrum Analyser that sold inexpensively because it was faulty. It seems that a batch of these units have found their way onto the second hand market from the US government. My example came from the Marine corps, which in itself is interesting. The unit is practically unused and spent its entire life in storage. Probably in a hot place which could explain the problem it has: an EEPROM that has lost some bits. Every module in these machines has an EEPROM that contains things like the serial number of the module and calibration data. This particular EEPROM is on the front end module and the faulty data in it is causing a 1st LO unlock. Fortunately, the hard disk in these units has a backup of the contents of all the EEPROMs so this problem should be fixable. But before I open the thing up and desolder the EEPROM to reprogram it, I was wondering if there might be some service function to re-program the EEPROMs. It makes sense I think that if they took the trouble to make backups of the EEPROMs there would be a restore function as well. Does anyone happen to know? The service manual does mention a service function to program the EEPROM of the IF filter module, but unfortunately says nothing about the other modules.

author: bncengr
author_rank: Newbie
timestamp: October 21, 2018, 06:00:14 am
content: I think you can hold the "." (period) button while it powers up to do what you're asking. I know that re-enumerates all the modules.Cross your fingers. A 1st LO unlock could also be a bad front end unit.

author: Omicron
author_rank: Regular Contributor
timestamp: October 21, 2018, 07:33:14 am
content: That does the opposite: it creates the backups. In fact that’s how I know the EEPROM is bad because when I do this it logs an error for every bad block (2 of them in my case). Luckily it is smart enough not to overwrite a previous backup in this case.
How to use sigrok and gnuplot - Page 1
Forum section: electronics / testgear

author: HoracioDos
author_rank: Frequent Contributor
timestamp: October 18, 2018, 09:56:42 pm
content: I would like to share this example about how to use sigrok and gnuplot. I did this without any particular purpose. I know that there are more useful examples than reading values from a Korad but perhaps someone would fine it useful.This simple bash script (getdata.sh) gets data from a Korad PSU with sigrok and it creates an output file.Code:#!/usr/bin/env bashecho 'Starting ...'sigrok-cli --driver=korad-kaxxxxp:conn=/dev/ttyACM0 --set --config enabled=offecho 'Setting Voltage'sigrok-cli --driver=korad-kaxxxxp:conn=/dev/ttyACM0 --set --config voltage_target=9echo 'Enabling Output'sigrok-cli --driver=korad-kaxxxxp:conn=/dev/ttyACM0 --set --config enabled=onecho 'Logging'sigrok-cli --driver=korad-kaxxxxp:conn=/dev/ttyACM0 --continuous -o /tmp/data.dat -O csvtrap "{ echo 'Quit...' ; sigrok-cli --driver=korad-kaxxxxp:conn=/dev/ttyACM0 --set --config enabled=off ; exit 255; }" EXITThen Gnuplot script (demo.plt) reads the last 50 lines of the output file while sigrok appends new lines at the end in an infinite loop until the escape key is pressed.Code:# set title "Test"# set title font ",20" norotateset datafile separator ','set yrange[0:0.03]set autoscale xset ylabel "A"set xlabel "Samples"set gridbind "Escape" "unset output; exit gnuplot"plot "< tail -n 50 /tmp/data.dat" using 3 smooth acsplines title "I"pause 1rereadExecute gnuplot ./demo.plt to plot data. Remember to Quit by pressing Escape key.

author: HoracioDos
author_rank: Frequent Contributor
timestamp: October 19, 2018, 12:45:51 pm
content: This is a brymen 257s logging voltage.Code:#!/usr/bin/env bashecho 'Logging'sigrok-cli --driver=brymen-bm25x:conn=/dev/ttyUSB0 --continuous -o /tmp/data.dat -O csvtrap "{ echo 'Quit...' ; exit 255; }" EXITBrymen plot scriptCode:set datafile separator ','set yrange[8.980:9.010]set autoscale xset ylabel "Volts"set xlabel "Samples"set gridbind "Escape" "unset output; exit gnuplot"plot "< tail -n 50 /tmp/data.dat" using 2 smooth acsplines title "V"pause 1rereadKorad again with two y-axisCode:set datafile separator ','set yrange[0.01:0.03]set y2range[0:12]set autoscale xset ylabel "Ampere"set y2label "Volts"set ytics border nomirrorset y2tics border nomirrorset xlabel "Samples"set gridset key box lt -1 lw 1bind "Escape" "unset output; exit gnuplot"plot "< tail -n 50 /tmp/data.dat" using 3 smooth acsplines title "I" , '' using 2 with lines axes x1y2 title "V"pause 1reread
Aeroflex SGD-3 Digital Signal Generator. What's 100 ohm differential inputs?? - Page 1
Forum section: electronics / testgear

author: ErnieEngineer
author_rank: Contributor
timestamp: October 18, 2018, 08:51:59 pm
content: Aeroflex SGD-3 Digital RF Signal Generator. Would you recommend?Looking to buy a good general purpose vector signal generator. I really need vector modulation (from IQ inputs) and generic modulation ( PSK, FSK, QAM). I think that this Aeroflex SGD-3 fits the bill. Includes most of the options which is great. I also like that it has a nice UI and the user manual is pretty simple.What is up with I/Q inputs tho? It has " I+, I-, Q+, Q- IN Four BNC sockets, differential inputs, 100 Ω. " Looks like there are four normal looking BNC connectors for this on the front panel. I just want to hook this thing up to a AWG with normal outputs. Would I need some kind of adapter?https://www.ebay.com/itm/Aeroflex-SGD-3-Digital-RF-Signal-Generator-100-kHz-to-3-GHz-w-options/https://www.valuetronics.com/product/sgd3-ifr-rf-generator-usedhttps://aeroflex.viavisolutions.com/support/technical-support/product-support-documents/sgd-digital-signal-generatorhttps://www.viavisolutions.com/en-us/products/discontinued/sgd-digital-signal-generator-discontinued

author: tautech
author_rank: Super Contributor
timestamp: October 18, 2018, 09:10:37 pm
content: This one ?https://www.ebay.com/itm/Aeroflex-SGD-3-Digital-RF-Signal-Generator-100-kHz-to-3-GHz-w-options/263893582164?hash=item3d71488154:g:5MAAAOSwh49bfXPk:rk:1:pf:0Do you need 3 GHz BW or would one of these units with the IQ option be OK ?https://www.siglentamerica.com/waveform-generators/sdg6000x-series-pulsearbitrary-waveform-generator/

author: ErnieEngineer
author_rank: Contributor
timestamp: October 18, 2018, 09:59:03 pm
content: Yes, that one from Aeroflex. I entered the link wrong. Already have an AWG very similar to the one you linked to. I am looking for a proper RF signal generator that I can produce QAM and SSB (and others) at up to a few GHz. Really confused about the 100 ohm IQ inputs. Never saw that before on an instrument .

author: tautech
author_rank: Super Contributor
timestamp: October 18, 2018, 10:14:58 pm
content: Quote from: ErnieEngineer on October 18, 2018, 09:59:03 pmIf you're not in a desperate hurry Siglent have an RF gen coming out soon that apparently links together with SDG6000X models so to give IQ at higher BW's.https://www.eevblog.com/forum/testgear/siglent-ssg3000x-series-rf-signal-generators/This Chinese site won't allow direct translation but you can copy/paste anything into a translator that needs further investigation.http://www.siglent.com/RF-Generator/SSG3000XBeen asking when it's to be released but no definitive answer yet.

author: ogden
author_rank: Super Contributor
timestamp: October 18, 2018, 10:59:29 pm
content: Quote from: tautech on October 18, 2018, 10:14:58 pmMSRP?p.s. I wish I had 4k$ because eBay offer is Goood: You save: $52,346.91 (93% off)
INSTEK GSP 810 how to adjust tracking generator frequency - Page 1
Forum section: electronics / testgear

author: Txtom
author_rank: Newbie
timestamp: April 08, 2017, 01:16:49 am
content: I bought a used INSTEK GSP810 which seems to work quite well exept for a problem with the tracking generator.The problem is that the tracking generator is sweeping too wide a frequency and so doesn't track the spectrum analyzer properly . It starts on the right frequency but sweeps too far out by about 15%. My guess is that there is a calibration pot inside or a hidden calibration menu item but I can't figure it out. Can anyone help with information or a service manual. There is a pot labeled frequency on the back of the cabinet but it doesn't seem to do anything (maybe that's the one but broken).

author: ohmedarick
author_rank: Newbie
timestamp: October 18, 2018, 12:52:16 am
content: Hi:Where you able to get the service manual GSP-810. Thank youRicardo
Cheap basic conducted EMC tester  for offline 60W SMPS LED driver - Page 1
Forum section: electronics / testgear

author: ocset
author_rank: Super Contributor
timestamp: October 17, 2018, 07:46:26 pm
content: Hi,Does anyone know if there's a video like this one for using the DSA815 spec anal for anoffline60W smps (LED driver) conducted emissions test?...We like the idea of just having the small metal sheet under the DUT, rather than a completely shielded room, which we cant afford(its only to act as a basic guide, not for the actual accreditation)I believe the HM6050 is the cheapest LISN to use.http://www.farnell.com/datasheets/1851611.pdf?_ga=1.216594710.1679746183.1489787856

author: tautech
author_rank: Super Contributor
timestamp: October 17, 2018, 08:07:22 pm
content: It ain't rocket science as the EMI testing part in this video demonstrates:https://youtu.be/ZjO5hKPwcEY

author: nctnico
author_rank: Super Contributor
timestamp: October 17, 2018, 08:13:50 pm
content: Please skip Tautech's off-topic infomercial because a) the methods shown in there aren't going to help pass emissions testing first time at all b) it doesn't even show measuring conducted emissions.For conducted emissions testing you don't need a shielded room but a LISN suitable for mains and a spectrum analyser which goes up to 100MHz.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 18, 2018, 12:36:56 am
content: This works, more or less;https://www.seventransistorlabs.com/Images/DistAmp2.jpgThe important part being the metal plate underneath everything, and the LISN on the left, into which the power supplies connect. Its RF ports are terminated as shown, since I was using it as a filter in this case, but yeah, that's where you'd measure things of course.Testerizing conducted susceptibility requires a modestly powerful amplifier and a sweep generator; which, interestingly enough, is the main intended application of the above mentioned amplifier (the shiny stuff on the right side). You will need more than a few watts to reach useful output levels (3 or 10V are typical), times a fair factor to account for the attenuator required (to help isolate the amplifier from reflected power at unlucky frequencies), and you will also need a cable clamp signal injector of some sort, to deliver common mode conducted energy to cables that aren't simply wired into a LISN.A similar setup is used for EFT testing, and surge (where applicable) is coupled in with a CDN as well.Tim
NI PXIe-8106 controller memory upgrade to 4GB - Page 1
Forum section: electronics / testgear

author: ZL1CVD
author_rank: Regular Contributor
timestamp: October 20, 2018, 11:23:33 pm
content: Just a note that may help someone. NI PXIe-8106 can be upgraded to 4GB despite NI docs indicating 2GB is maximum. I used 2x Samsung M470T5663QZ3-CF7 2GB PC2-6400S modules. Note this is the controller used in Agilent E6621A.I also note the CPU is socketed so will look at upgrading that also and advise outcome..

author: ZL1CVD
author_rank: Regular Contributor
timestamp: October 20, 2018, 11:58:11 pm
content: CPU fitted is 2.167GHz Intel Core 2 Duo T7400 (SLGFJ). Maximum upgrade for this Socket M board would be 2.333GHz T7600 (SL9SD). As the performance will not be that great, probably not worth the effort upgrading..
JBC Nano station. The NASE Edition - Page 1
Forum section: electronics / testgear

author: stenbror
author_rank: Unknown
timestamp: October 12, 2018, 12:43:16 pm
content: HiI am considering buying a JBC NASE 2C from eleshop.eu for import to Norway. They are asking about Euro 977.81 including freight and i have to pay about 25% tax and 34 EURO for the plesure of paying TAX........ So about 12.500 Norwegian Kroner.I have a JBC CD-2BE station already and is pleased with it. Are there anyone that has experience with the Nano station in question and is it worth it to invest in it?Thanks for any replies and advices.

author: stenbror
author_rank: Unknown
timestamp: October 17, 2018, 05:26:23 pm
content: Well, now it is at my lab anyway.

author: netandino
author_rank: Newbie
timestamp: October 17, 2018, 10:37:02 pm
content: is a nice tools for very fine work, I have only had lios with the consumables "tips" that are very fast spent to be very small, I spend more the C105-105
Firmware ESR ? - Page 1
Forum section: electronics / testgear

author: Andbro
author_rank: Regular Contributor
timestamp: October 16, 2018, 03:50:47 pm
content: Hi,I need your help, wich is the right firmware formy model ?Thanks

author: joeyjoejoe
author_rank: Frequent Contributor
timestamp: October 17, 2018, 04:59:37 pm
content: You should visit this thread to ask questions :https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/It is the Fish8840TFT variant.
FY6600 - 60MHz - bug reporting ??? - Page 1
Forum section: electronics / testgear

author: softfoot
author_rank: Contributor
timestamp: October 26, 2018, 11:39:50 am
content: I have one of these and, for me at least, it is good value for what I paid.The PC software is v6.0 and the firmware is v3.3 and seems to have provision to update the firmware on line.I have discovered one problem - the PC S/W only talks to CON1 to CON16 - my system goes up to 24!! so using it requires a certain ammount of "fafing" about to get it to connect. It does have an "autoconnect" feature but it dioesnt seem to work above 16.Has anyone found a way to report such bugsTIA and best regards,Dave

author: rhb
author_rank: Super Contributor
timestamp: October 26, 2018, 05:56:28 pm
content: ROFL!!!You must be kidding. Your chance of getting a "bug/feature" fix from Feeltech is identically zero. But you can try contacting admin@feeltech.net is you're feeling masochistic. They will promise lifetime support, but that person has already died, so the support has ended.

author: softfoot
author_rank: Contributor
timestamp: October 26, 2018, 07:11:21 pm
content: PMSL - much as I expected ;-)Dave

author: TheSteve
author_rank: Unknown
timestamp: October 26, 2018, 07:29:36 pm
content: Probably not so much a bug as a limitation of the development software they used - VB6 maybe?

author: malagas_on_fire
author_rank: Frequent Contributor
timestamp: October 26, 2018, 10:26:28 pm
content: Can you go to Device Manager , Com Ports and right click. Then go advanced and change Com number

author: softfoot
author_rank: Contributor
timestamp: October 26, 2018, 10:29:44 pm
content: I didn't know you could do that!You cannot do that as it b*****s up bluetooth device handling :-(The only thing you can do is change the com port to one that is free (and below 16)!Oh well - worth a try I supposeDave
Rigol 1000Z series: all options standard - Page 1
Forum section: electronics / testgear

author: TomS_
author_rank: Frequent Contributor
timestamp: October 17, 2018, 08:10:39 am
content: (I did a very weak search for this, apologies if it has already been posted and Ive just been under a rock for some time)I was just browsing the Rigol website to grab some prices for a friend and noticed that the 1000Z series now comes with all options standard. According to the website:QuoteThis only seems to apply in North America (United States and Canada), not Europe or International (which seems to cover Australia at the very least), and I didnt check any other non-English speaking country pages.

author: Fungus
author_rank: Super Contributor
timestamp: October 17, 2018, 08:32:36 am
content: Quote from: TomS_ on October 17, 2018, 08:10:39 amYep, it's been that way for a while now.(possibly a response the Siglent, who include serial decoders, etc., as standard)Quote from: TomS_ on October 17, 2018, 08:10:39 amIt's worldwide.

author: TomS_
author_rank: Frequent Contributor
timestamp: October 17, 2018, 09:26:25 am
content: Ah very good then. I dont look at the Rigol website very often.

author: Fungus
author_rank: Super Contributor
timestamp: October 17, 2018, 09:27:39 am
content: If only they'd do 100Mhz as standard.
Using the DE-5000 to measure stray inductance of low-value wirewound resistors - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: October 15, 2018, 03:47:48 pm
content: Hi all-Anyone have experience using the DE-5000 to measure the stray inductance of low value wirewound emitter resistors?I've got a few different emitter resistors here and will post some measurements, but I'm curious if others have done this and found it A) accurate and B) useful?Thanks.

author: chronos42
author_rank: Regular Contributor
timestamp: October 15, 2018, 07:12:53 pm
content: Hi,that works well with the DER EE 5000.Set the meter to LS/LP with the blue LCR AUTO key, then with the SER/PAL key to LS and D/Q/ESR/phi to ESR. Set the frequency to 100kHz.

author: coppercone2
author_rank: Super Contributor
timestamp: October 15, 2018, 08:07:09 pm
content: I think the DE-5000 has accuracy specs in the manual relating to the accuracy of measurements at particular impedances. I don't recall if it has accuracy specs of the parasitics though.Secondary Parameters Accuracy in manual has formulas for accuracy. would be nice if someone bothered to make a graph

author: evava
author_rank: Regular Contributor
timestamp: October 16, 2018, 07:19:58 am
content: Quote from: cvanc on October 15, 2018, 03:47:48 pmI have experience using my DE-5000 to measure stray inductance of low valuewirewoundresistors, but it is not pleasing experience and my DE-5000 behaves exactly the same way as in this post:(sorry for cross linking)https://www.eevblog.com/forum/testgear/strange-behaviour-with-my-de-5000/msg897162/#msg897162.SoI think there are better meters for this task.

author: coppercone2
author_rank: Super Contributor
timestamp: October 16, 2018, 12:59:34 pm
content: he said he had problems with the kelvin clips. I noticed this too and I had to resolder my alligator clips.I might do experiments on mine in a few weeks, but I have nothing good to compare it to.I can actually use the formula to calculate error based on the manual.oh yea, this thing also got funky with me before from batteries IIRC.
AC/DC power/energy meter - Page 1
Forum section: electronics / testgear

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: October 15, 2018, 05:09:13 pm
content: I am having a hard time finding a tool to measure power in both AC and DC.Ideally I would buy the Metrahit Energy meter but it is very hard to find and a bit expensive since I don't need all the other DMM functions.I already have a Fluke 345 which I use mainly for High current application since it is a clamp style meter but I need something much more accurate for power and energy reading at low power outputs.Finding a suitable tool has been frustrating as there seems to be none out there.

author: R_G_B_
author_rank: Frequent Contributor
timestamp: October 15, 2018, 05:19:08 pm
content: I have the gossen it does AC power analysis and DC upto say about 10 amps.If you want to measure higher D.C power you need a later version of the meter with version 2.xxx as they made some modification to allow you to connect a hall effect current clamp to the current input. They sell a D.C power sethttps://www.gossenmetrawatt.com/english/produkte/metrahit-energy-dc-power-set.htmOrI managed to find a cheap power clamp meter that does kWh, KW, VAR, VA.Problems is it's not true r.m.s which is a bit disappointing. It also does D.C power which is useful.https://www.aliexpress.com/item/HoldPeak-HP-870P-Power-Clamp-Meter-Auto-Range-AC-DC-Voltmeter-999-9A-Ammeter-Tester-Electronic/32885509774.html
SL-928 SORNY ROONG desoldering station schematic - Page 1
Forum section: electronics / testgear

author: smile
author_rank: Regular Contributor
timestamp: October 15, 2018, 11:30:04 am
content: Hello, I'm looking or the SL-928 SORNY ROONG desoldering station schematic.Anyone has heard anything, I would really appreciate.https://www.soldering.com.tw/desoldering-station/sl-928.html
ESR meter vs firmware  - Page 1
Forum section: electronics / testgear

author: Andbro
author_rank: Regular Contributor
timestamp: October 14, 2018, 11:00:32 am
content: Hi,On the website of Mikrocontroller.net where we can find the latest Firmware Karl-Heinz, there are several possible models. Is there a website where you can find a photo with the model ?Thanks

author: hugo
author_rank: Regular Contributor
timestamp: October 14, 2018, 04:24:31 pm
content: Check this out:https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/
Wavetek 95 Manual? - Page 1
Forum section: electronics / testgear

author: Echo88
author_rank: Frequent Contributor
timestamp: October 16, 2018, 08:18:17 pm
content: Hi,does anyone have the manual for the Wavetek 95 (or 92, they should be the same in behavior) frequency generator? I cant get the sweep-mode to actually work.Thanks,Echo
MTI-1200 Fotonic Sensor - Page 1
Forum section: electronics / testgear

author: mdszy
author_rank: Unknown
timestamp: October 17, 2018, 09:38:27 pm
content: I just recently got an MTI-1200 Fotonic sensor from my local university and was wondering if anyone knew anything about these things! This one has a single channel installed and light comes out of the probe at the end, and it powers on, auto-zeroes and everything. I have no idea how to test it further. Anyone have any ideas?Furthermore, anyone have any idea as to how much one of these is worth in used condition? I see some on eBay currently for quite a bit of money and I really have no idea how much this thing would go for.

author: helius
author_rank: Super Contributor
timestamp: October 17, 2018, 10:12:32 pm
content: It is used similarly to adial indicator, to measure deflection such as runout in a bearing or eccentricity in a gear. You could put the probe in a clamp and aim it at a rotating object such as a drill chuck. As the object rotates, its runout will vary the distance to the probe, which should appear on the instrument's output.

author: mdszy
author_rank: Unknown
timestamp: October 17, 2018, 10:19:57 pm
content: Quote from: helius on October 17, 2018, 10:12:32 pmOh gotcha, cool! Thanks, I'll see if I can give that a try at some point soon!
DSO-X 4154A not booting - Page 1
Forum section: electronics / testgear

author: rtekal
author_rank: Contributor
timestamp: October 11, 2018, 10:16:44 am
content: Hi,I have a Agilent DSO-X 4154 A in which the display is not coming. I have monitored the voltages mentioned in the service manual. The VP25V (Backlight power) and the (VP13VPRB Auto probe power) are not coming. The front panel lights of Ref, Math & Digital glow sequentially and stops there.I tried analyzing the power up process and found that the NCP3064 pin 5 on/off is held low. I am unable to find out the source for this control pin.Anyone who has faced and resolved this problem, please help. I have 2 more MSO's with the same issue.I read in the other forums that Keysight has a service note 3 for this problem, but Keysight has removed that service note.Regards

author: Pinkus
author_rank: Frequent Contributor
timestamp: October 12, 2018, 09:14:09 pm
content: as said in the other thread twice: youmustlog the output of the serial interface. Everything else is just guessing.

author: rtekal
author_rank: Contributor
timestamp: October 13, 2018, 09:30:45 am
content: Quote from: Pinkus on October 12, 2018, 09:14:09 pmNo offence meant. Just posted it here based on your reply to my post in the repair thread.Will post the serial data once I get back to the dso.Regards

author: Petter
author_rank: Contributor
timestamp: October 13, 2018, 03:43:49 pm
content: I had a similar (your description is a bit too vague to say for sure) boot problem with a DSOX3K. Turned out there was a free repair for that - it was caused by dodgy memory chips causing a boot problem. Later firmwares are more tolerant to this issue. There was some activity of lights on the buttons, but no display. Might be the same problem for your scope. Good luck
Agilent E3648A odd behavior (+Video) - Page 1
Forum section: electronics / testgear

author: The E Engineer
author_rank: Newbie
timestamp: October 13, 2018, 01:22:07 pm
content: Dear all,This is my first post but i have been here as a guest for many years. Today I need your help.I got an Agilent E3648A, used from ebay. The first channel does not go all the way to 0.00V. The minimum I can set is 0.3x volt and this voltage remains even when the output if OFF!When I set the voltage to 8V for example, and disable the output, the power goes down to 0.3V not as instantly as the 2nd channel goes.Any idea where to begin with?Thank you in advance-Update1: The behavior is like the output capacitor remains charged even when the power supply is disconnected from the mains. So the 0.3v stays and gradually goes down.-Update2:See it in action:
Service manual for Gould 1425? - Page 1
Forum section: electronics / testgear

author: LeaUK
author_rank: Contributor
timestamp: October 09, 2018, 12:33:00 pm
content: Hi allAny one know where I can obtain a Gould 1425 manual and service manual from?Bought an old girl and note the voltage cal is around 10% out, also a difference between storage mode voltage and analogue appears present.Any tips welcomedCheersLea

author: LeaUK
author_rank: Contributor
timestamp: October 12, 2018, 11:31:33 am
content: Couldn't find a service/cal manual but did find CH1 and CH2 vertical gain presets after a long hard stare. Remove the top cover and they are located near the front on the main large 'OS300' PCB.CH1 Gain preset is R302 and easily accessible.CH2 Gain preset R352 is hidden by a PCB hosting the trigger press switches, but this PCB has a cutout to enable preset access. See referenced photos below:https://1drv.ms/f/s!AgmKo7c0CB2xi2NFij7dsctNGRaXThey needed a little tweek and 'Bob's ya Uncle'.That's enough of a calibration for me for this old girl.

author: LeaUK
author_rank: Contributor
timestamp: October 13, 2018, 07:52:44 am
content: Just one last tip, I found a PCB with 6 presets on easily accessible from the side. These change the storage CH1/CH2 gain and vertical position in storage mode only, so if adjusted settings between analogue and storage mode can be aligned.It's a Bobby Dazzler!See here:https://1drv.ms/u/s!AgmKo7c0CB2xi2SJGXDSiyLQJvrVLea
Cheap basic signal generator vs bench model ? - Page 1
Forum section: electronics / testgear

author: lordvader88
author_rank: Frequent Contributor
timestamp: April 25, 2018, 01:40:30 pm
content: I have a basic $10 XR2206 SigGen, which is only a few volts and only DC. I only really use to see if my scopes are working (I have some I'm working on). But it should be an investment to get a bench model, or even a broken 1 and try to fix it and learn. So I don't mind spending +$100-200. I love RF, so higher the freq. the better, I'm sure I'll need it.But what do the proper bench models from the big brands really do, vs a brand new $100 FY3224S 24MHz for example (24MHz is still low I know)

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: April 25, 2018, 02:37:43 pm
content: The more expensive models will give wave forms like cardiac. Why this is in any way important is any ones guess.

author: BillB
author_rank: Unknown
timestamp: April 25, 2018, 04:13:23 pm
content: Higher output frequency, higher sampling rate, higher vertical resolution, fancier displays, more built-in waveform options, standard lab-interface (GPIB,SCPI) and better accuracy.

author: lordvader88
author_rank: Frequent Contributor
timestamp: April 25, 2018, 04:47:37 pm
content: Noob Q but are they usually full AC output? And then with DC offset ?

author: BillB
author_rank: Unknown
timestamp: April 25, 2018, 05:01:54 pm
content: Yes, AC waveform with an optional, adjustable DC offset.

author: Mr. Scram
author_rank: Super Contributor
timestamp: April 25, 2018, 05:08:42 pm
content: The one purchase that really surprised me with its usefulness was the AWG. I bought it as a nice to have, but it ended up being a part of many projects and tests. Now I only regret having just one channel.Both AC and DC settings allow you to emulate all sorts of signals. You can shift AC until it becomes DC.

author: Gregg
author_rank: Super Contributor
timestamp: April 25, 2018, 07:08:16 pm
content: You may want to look over the FY6600 thread; it may be an inexpensive solution with some hacking.https://www.eevblog.com/forum/testgear/feeltech-fy6600-60mhz-2-ch-vco-function-arbitrary-waveform-signal-generator/It can be enhanced considerably by installing a linear power supply and a couple of op-amps; some of the forum members are working on new firmware.I bought one from a US warehoused company and it came with the latest firmware and have been following along with the improvements.Feeltech is coming out with a newer model fy6800 that may bring the prices of the 6600 way down in the near future

author: josh bowman
author_rank: Newbie
timestamp: October 13, 2018, 08:16:17 pm
content: Hi I have a question about FY3224S (FY3200S-24M). What does Scan rate: 1s ~ 999s / step mean? I want to use this to sweep an FM radio to align it and need it to sweep 60 times per second.
Looking for Simco Ion "Calibrator Reader" software - Page 1
Forum section: electronics / testgear

author: _Wim_
author_rank: Super Contributor
timestamp: October 10, 2018, 07:12:20 pm
content: Hi, I bought the following unit on Ebay to play around with:https://technology-ionization.simco-ion.com/products/instrumentation/novx/novx-7000-process-monitorTo my surprise, little info was available on the website of Simco. I contacted the Simco Ion support, and after a few retries I managed to receive the user manual for this unit. But for the software they said "we will look into what is possible", but no feedback since...I have no idea if the "Calibrator Reader" software needed to be purchased, or it came free with the purchase of the unit. Currently my unit beeps when its turned on due to missing RS485 comms, and they is no way using the internal dip switches to turn this alarm off.If somebody knows where I can get this software, this would be greatly appreciated.

author: _Wim_
author_rank: Super Contributor
timestamp: October 12, 2018, 02:52:38 pm
content: Some update. Today I was contacted by Simco Ion, apperently a CD is on its way to me.
Fluke 867B Replacement Battery Not Charging -- Cameron Sino?? - Page 1
Forum section: electronics / testgear

author: jazz57
author_rank: Newbie
timestamp: October 10, 2018, 07:01:04 am
content: I recently picked up a used Fluke 867B and the previous owner was nice enough to install a new replacement battery made by Cameron Sino. Only problem is: It doesn't charge!Can anyone with this meter and a working battery check if they're able to measure anything on the 'C' battery terminal? From what I can tell it seems to be open circuit. The service manual says the charging circuit in the meter is connected to a current limited 15V internal supply, and I was able to verify the meter does put out 15V on the C contact. I was able to flow about 100mA through a 150 ohm resistor, too, so I think the charging circuitry is OK.Also, if anyone has replaced their 867/3 battery, which brand did you use? They all look like they come from the same factory in China.

author: mahi
author_rank: Regular Contributor
timestamp: October 11, 2018, 05:09:19 pm
content: See my reply inFluke 867B, good or obsolete?

author: jazz57
author_rank: Newbie
timestamp: October 11, 2018, 08:51:56 pm
content: Saw it. Thank you!
Fluke 8800A/8810A Ohms converter board version and compatibility - Page 1
Forum section: electronics / testgear

author: GregDunn
author_rank: Frequent Contributor
timestamp: October 10, 2018, 02:15:34 am
content: I have an 8800A with the newer ohms converter board (no batteries). If I were to buy one of these boards separately, would updating an older 8800A be as simple as swapping the battery-using board on a meter with one of these? I ask because there seem to be multiple versions of the ohms board; I have seen a 4010, 4012, 4015 listed in various documents - and some seem to have 5 connections to the main board and others, 4.Another thing: do all versions have the precision resistor network (listed as RN6 in my 8800A schematic)? I have seen photos of a board which does not have this network and I suspect it's been hacked to make it function, but improperly.

author: lowimpedance
author_rank: Super Contributor
timestamp: October 10, 2018, 02:44:52 am
content: Do you have links to or copies of these documents relating to the various revisions as I would like to see what changes there are.I have an 8810a and a dead 8800a with only the battery ohms PCB which incidentally works happily in the 8810a. (the 8810a model DVM would have had the non battery ohms option only available).The online 8810a manual has an updated ohms PCB circuit, are there other versions I should be looking for with actual circuit differences ?.Still for me the chances of getting one of those later ohms versions is practically non existent down here so I will re-engineer the existing battery version to take an isolated dc-dc supplyin place of the battery holder so all information I can get will be helpful making the right choices.

author: GregDunn
author_rank: Frequent Contributor
timestamp: October 10, 2018, 03:32:21 am
content: I have 8800A and 8810A manuals I downloaded from Fluke as well as found via Google. A couple of them may have come from xdevs, I can't remember. They're about 3.5MB each; if you can't find them I might be able to send them via email.fluke_8810a_im.v4_service_manualFluke_8810A_Digital_Multimeter_Instruction_ManualFluke--8800A--user,schematics--ID1438Fluke8800A Instruction ManualThey have some subtle differences. I also did a Google image search and found a couple of the boards which looked a bit different, including one which is missing the resistor network and appears to be an earlier rev of the no-battery board.

author: lowimpedance
author_rank: Super Contributor
timestamp: October 10, 2018, 04:08:42 am
content: Ah ok I will search some more including the image search which I did not try before.Thanks

author: GregDunn
author_rank: Frequent Contributor
timestamp: October 10, 2018, 05:42:16 am
content: Here's one which appears to be missing the resistor network - not sure if it's a different rev or just a modified/faulty board?https://www.ebay.com/itm/FLUKE-Digital-Multimeter-part-8800A-4010T-/122395902974
ifr a8000 with out sweep generator - Page 1
Forum section: electronics / testgear

author: ve2pf
author_rank: Newbie
timestamp: October 08, 2018, 10:41:32 pm
content: High Guys! First post here..I got myself a nice IFR A-8000 spectrum generator. It lack a sweep generator. (it does have a sweep output for synching of a sweep genrator)I am in search of a tracking generator so that I could use it to tune rf filters and to adjust radio's.I dont need it to be the most precise rf generator cause all my electronics stuff is for personnal thing. I am a Ham radio operator (think that it is obvious from my nickname ;-) )If anyone have parts that would fit in my IFR that would be nice. or a tracking generator at a good price I would be very happy.If you also have a service manual.. it would even be incredible..ThanksPierreVE2PF