hybridfree/eevblog-posts huggingface dataset:
Amps to mV convertor - Page 1
Forum section: electronics / testgear

author: andyB2022
author_rank: Regular Contributor
timestamp: October 10, 2022, 11:12:12 am
content: Hi, looking around Yt I've found Dave's video about a nice box that translates current to mV similar to a regular shunt.Video link:The question is does anyone know the name of the device at 17:40?

author: Kean
author_rank: Unknown
timestamp: October 10, 2022, 11:22:21 am
content: Do you mean the uCurrent?Details in the EEVBlog store, but currently out of stock.https://www.eevblog.com/product/ucurrentgold/

author: wasedadoc
author_rank: Super Contributor
timestamp: October 10, 2022, 11:22:57 am
content: It is a device that Dave Jones designed and sells. He calls it "microcurrent". It is a shunt plus an amplifier to increase the small voltage developed across the shunt.

author: Kean
author_rank: Unknown
timestamp: October 10, 2022, 11:31:33 am
content: Dave published an article describing it, so you could actually build your own if so inclined.http://eevblog.com/files/uCurrentArticle.pdfThere is a few videos and forum posts about improvements (the uCurrent "Gold", potential issues, and custom mods) since that article was originally published.The EEVblog 121GW DMM also includes a similar amplifier for "low burden" current measurement.https://www.eevblog.com/product/121gw/

author: andyB2022
author_rank: Regular Contributor
timestamp: October 10, 2022, 12:01:09 pm
content: Thank you guys for all of your responses, appreciate it.

author: J-R
author_rank: Super Contributor
timestamp: October 10, 2022, 06:36:00 pm
content: If you want something pre-made and don't mind paying a bit for it, there is the CurrentRanger:https://lowpowerlab.com/shop/product/152
I need a review on UNI-T MSO3000E Series Digital Oscilloscopes  - Page 1
Forum section: electronics / testgear

author: AmmarKurd
author_rank: Contributor
timestamp: October 09, 2022, 02:03:42 pm
content: Hello guys, as mentioned in the title I am considering buying one of the UNI-T MSO3000E Series Digital Oscilloscopes, what do you think? has anyone tried this scope before? is it worth the investment? I am buying it online since I don't have any options here in my country, I appreciate any feedback. Thank in advance.

author: BillyO
author_rank: Super Contributor
timestamp: October 09, 2022, 06:08:23 pm
content: I honestly wouldn't buy anything over $100 from UNI-T. Their stuff is not all that bad, but they have absolutely no support.

author: AmmarKurd
author_rank: Contributor
timestamp: October 09, 2022, 06:15:21 pm
content: Thanks for the replay BillyO, what do you think is a better alternative?

author: bdunham7
author_rank: Super Contributor
timestamp: October 09, 2022, 06:27:29 pm
content: Quote from: AmmarKurd on October 09, 2022, 02:03:42 pmIt depends on what is available to you in your area, online or otherwise. Can you obtain products from Siglent, Rigol, GW Instek, Hantek and MicSig?

author: AmmarKurd
author_rank: Contributor
timestamp: October 09, 2022, 06:46:35 pm
content: I don't have anything locally, but the company I work for will manage to order from abroad, they actually suggested this model and requested my opinion, and since I don't have a previous experience with uni-t scopes I posted in here. I have Hantek DSO5072P scope currently. So, basically, I can suggest another scope and if it fits with the budget they will agree to order it.

author: BillyO
author_rank: Super Contributor
timestamp: October 10, 2022, 02:41:11 pm
content: Have a look at the Siglent SDS2000X Plus series and the Rigol MSO5000 Series. I know for sure that Siglent offer terrific support. I have no experience with Rigol but reading reports on this site lead me to believe they are just as responsive as Siglent.

author: AmmarKurd
author_rank: Contributor
timestamp: October 10, 2022, 05:55:02 pm
content: Thanks, BillyO for the recommendations, I really appreciated it.

author: Fungus
author_rank: Super Contributor
timestamp: October 10, 2022, 06:32:00 pm
content: Quote from: AmmarKurd on October 09, 2022, 02:03:42 pmI think that in that price range you'd be insane if you don't get a Siglent SDS2000X-series.
Fuses and Manual for FLUKE D804 Multimeter?  - Page 1
Forum section: electronics / testgear

author: Frank Grimes
author_rank: Newbie
timestamp: October 11, 2022, 05:48:46 pm
content: Does anyone happen to know a source for a manual for a FLUKE D804 Multimeter? I have searched and came up empty. Failing this anyone know the proper fuses for a D804? I have one that appears to be in great condition but Only has a large backup fuse that I think is a Bussman BBS-3?My D804 When in the tone for continuity mode makes a constant noise and not sure its operating correctly.It is such a unique and well made meter I would like to get it running to use when my cheapo auto ranging multimeter isnt readable.Does the D804 reminds anyone else of the Alien movie aesthetics?

author: Gyro
author_rank: Super Contributor
timestamp: October 11, 2022, 06:22:28 pm
content: Welcome to the forum.According to Dr Taylor, one of Fluke's design engineers in the '70 - '80s, the D804 was a variant of the D8024...https://www.eevblog.com/forum/testgear/old-fluke-multimeters/msg322557/#msg322557You can find the 8024 manual on ElektroTanya...https://elektrotanya.com/fluke_8024a_multimeter.pdf/download.htmlHopefully that will give you what you need.EDIT: Fluke have the 8024 (A and B variants) too...https://www.fluke.com/en-gb/support/manuals(leave off the 'D')

author: Frank Grimes
author_rank: Newbie
timestamp: October 11, 2022, 07:23:33 pm
content: Oh awesome!!! Thanks! I did notice the board in the meter is marked 8024. Thank you very much!
JDS6600 SIGNAL GENERATOR CALABRATION  - Page 1
Forum section: electronics / testgear

author: samson
author_rank: Contributor
timestamp: October 07, 2022, 10:23:13 pm
content: I have the JDS6600 Signal Generator.Please help me. When I set the JDS6600 to 10.000'000'00mhz on ch 1 or ch 2, it is showing 9.999.99mhz on my frequency counter after 1 hour warm up. It should read the same 10.000.00mhz. If I set the jds6600 to 10.000'028'00mhz then it will show the same on my frequency counter 10.000.00mhzHow do i adjust the jds6600 so it reads the same on the frequency counter.

author: tunk
author_rank: Super Contributor
timestamp: October 07, 2022, 10:42:34 pm
content: Assume you mean 9.99999MHz?What's you counter and what it's accuracy?

author: BillyO
author_rank: Super Contributor
timestamp: October 07, 2022, 10:46:02 pm
content: Both the WFG and the counter have tolerances in their accuracy. The JDS6600 is +/- 20ppm.I don't know what you counter is rated at, but you are showing it has 3 digits less resolution than the WFG. Is the right?In any case, it looks to me as though you are fairly well within tolerances. Expecting them to be exactly the same is asking a little much.The only way you will see that is on much more costly equipment where both the frequency counter and the WFG can be driven by the same external reference.
Reccomendation for cheap multimeter - Page 1
Forum section: electronics / testgear

author: thefallenidealist
author_rank: Newbie
timestamp: October 11, 2022, 11:35:00 am
content: I need new multimeter for my hobby work.I had a Uni-T UT61E for 5+ years and broke it - tried to measure it's own battery voltage. Battery was new, bought that day. I am an idiot.Anyway, now I need to buy new one.I am usually using buzzer, voltage, resistance & capacitance measurement.Budget: 50-100 $/€.What it needs to have:- auto-range- capacitance measurement on its own "notch" on the selector wheel (some Uni-T have it combined with diode/buzzer/capacitance)- NO auto-power off (I fucking hate that feature)What would be useful:- inductance measuring (not sure if applicable for this type of device)- backlight- capacitance measurement for pico Farads (not sure if applicable for this type of device)- LED blinking with buzzer - useful with headphones. But this can be modded laterI do not need "true RMS" (or anything AC/live house wires related), non conductive finding of wires in the wall etc. I will not measure over 100V DC or 10A of current.Buying another UT61E is an options but I rather have something better if possible.

author: Fungus
author_rank: Super Contributor
timestamp: October 11, 2022, 12:52:18 pm
content: https://lygte-info.dk/info/DMMReviews.html
Chroma Powerpro III training - Page 1
Forum section: electronics / testgear

author: nicknails
author_rank: Regular Contributor
timestamp: October 05, 2022, 02:03:12 pm
content: My company recently acquired a Chroma test system for power supply testing. It runs PowerPro III, and I can't find anything online about programming it or companies that offer training. Chroma itself wants an absurd amount of money for 1 on 1 training. Any use this and have recommendations?
Suggestions for a True RMS Digital Multimeters - Hand Held - Page 1
Forum section: electronics / testgear

author: hilper
author_rank: Contributor
timestamp: October 05, 2022, 09:35:39 am
content: HiWe need a True RMS Digital Multimeters - Hand Held, for my workplace.To guide you a little bit (but hopefully not limit your creativity too much), we had this one: Fluke 175, at my former workplace - but personally, I find it a little expensive.Do you have any choices for a more price friendly True RMS Digital Multimeters - Hand Held.BR

author: Fungus
author_rank: Super Contributor
timestamp: October 05, 2022, 09:46:21 am
content: Here are many suggestions:https://brymen.eu/product-category/multimeters/?orderby=price-descAll are as good quality as Fluke.

author: Kleinstein
author_rank: Super Contributor
timestamp: October 05, 2022, 10:03:08 am
content: True RMS is no longer a really expensive point. The main question is if you need the safety to confidently measure mains - that is what limits the choices.

author: NaxFM
author_rank: Regular Contributor
timestamp: October 05, 2022, 10:07:33 am
content: It depends on what you want to do.For electronics work, i think nothing beats the old trusty Uni-T UT61E.Obviously, your choice depends on your budget.

author: rsjsouza
author_rank: Super Contributor
timestamp: October 05, 2022, 12:02:37 pm
content: It always depends on what you are trying to do and how much you want to spend. Fungus' suggestion for Brymen is the closest you will get to your 175 in terms of quality and safety but at a lower cost than Fluke. If you are looking for a direct replacement, the Brymen BM250S series is what you are looking for. If you do not need capacitance measurements, the BM251 is a great replacement; otherwise, go for a BM252 and up. If you don't need the bargraph, then you can go for the BM230S series.http://www.brymen.com/Products2-3.htmlIf you are in a tighter budget and do not need the safety for high energy circuits, then theUT139C(a bit lower safety) and theUT61E(no safety) are excellent candidates. Both have several better specifications and features when compared to the 175 at the expense of safety - the UT61E has a higher count.
AM modulator for radiated immunity pre-compliance test 61000-4-3 - Page 1
Forum section: electronics / testgear

author: Simoda
author_rank: Newbie
timestamp: October 05, 2022, 10:15:52 am
content: Hello guys,I am planning to conduct a pre-compliance test (61000-4-3) and I have a TEM cellI am wondering what is the best (cheap) option to have a signal generator that can achieve 80% AM 1 kHz modulation whilst sweeping the carrier between 80MHz and 1000MHz!Any suggestions please?
HP8648C Repair Output way low above 1001MHz - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: October 05, 2022, 12:00:48 am
content: Well it seems that my 8648C has stopped working above 1001MHz. Above that frequency the output drops by 9 to 14dBm with reference to 0dBm 1mW.Has anyone seen that issue before I pop the covers on it. From 100KHz to 1001MHz it is absolutely spot on so I think the problem might be in a frequency multiplier string somewhere. Having only block diagrams won't make this easy. This particular generator has option 1EA which is the 100mW power output option.Thank for looking!SamW3OHM

author: TheDefpom
author_rank: Frequent Contributor
timestamp: October 06, 2022, 08:38:35 am
content: I’ve done some repair videos for it’s sister unit the B version, there are probably some pointers in there such as the sections to look at, FYI the 8920 uses very similar modules which has the CLIP info available online.
Pulsetek/Bradley electronics 233 - Page 1
Forum section: electronics / testgear

author: alan.bain
author_rank: Regular Contributor
timestamp: September 24, 2022, 09:30:22 am
content: Does anyone know anything about this pulse generator? I have one which had recently died and am without a diagram or any info and a websearch found nothing. It looks very straightforward repairwise with some information. Construction is almost totally based on MC10101 quad OR/NOR gates in ECL, I was simply using it to trigger a tunnel diode fast rise pulse generator for testing amplifiers and active probes.I've had no joy locating any manuals online or for sale. The only Bradley/Pulsetek products for which I can find information are various calibrators.

author: alm
author_rank: Super Contributor
timestamp: September 25, 2022, 02:18:04 am
content: I don't have any information on this model, but I just happened to come acrossthis eBay listing for a different Bradley pulse generator. I have no idea if they share any similarity, but just in case it might help you.Or maybe it's a tube-based generator that's decades older...

author: alan.bain
author_rank: Regular Contributor
timestamp: September 25, 2022, 11:58:50 am
content: Yes I saw that, but I have no idea what a 176 looks like, I did hunt around for a picture to see if it might be similar (or a previous generation) but so far nothing!

author: alm
author_rank: Super Contributor
timestamp: September 25, 2022, 12:39:10 pm
content: Searching Google Books for Bradley 176 gave me some hits in old magazines. No pictures, but i got snippets of ads of the 176 from 1971, 1972 (176B) and 1973 (176B):Quote from: 1971: Television and Short-wave World - Volume 43Quote from: 1972: Canadian Electronics Engineering - Volume 16 - Page 48Quote from: 1973: Electronic Engineering - Volume 45, Issue 1

author: factory
author_rank: Super Contributor
timestamp: September 25, 2022, 01:03:22 pm
content: Telford Electronics have a operator/service manual under "Pulsetek Type 233", best to check it is the same unit before ordering one though.https://www.telford-electronics.co.uk/manual.php?alpha=pDavid

author: alan.bain
author_rank: Regular Contributor
timestamp: September 25, 2022, 04:06:15 pm
content: Thanks - I have dropped them a line!

author: alan.bain
author_rank: Regular Contributor
timestamp: September 27, 2022, 05:17:48 pm
content: Just to say thanks to David above for the pointer. Telford Electronics have the schematics I need and they should be on their way!

author: alm
author_rank: Super Contributor
timestamp: September 27, 2022, 05:32:40 pm
content: Great! How much did you pay, if you don't mind sharing? Did they have a complete manual or just the schematics?

author: alan.bain
author_rank: Regular Contributor
timestamp: October 04, 2022, 07:53:49 pm
content: I now have schematics only. They were very confusing until I realised that the schematics use the "D" symbol to denote an OR or Do to denote a NOR gate!Alan
Racal VXI card - Page 1
Forum section: electronics / testgear

author: rcm99
author_rank: Newbie
timestamp: October 04, 2022, 03:32:03 am
content: I obtained a Racal 6062 VXI card that does exactly what I need for a project.This card has 4 channels of DAC and 4 channels of ADC.I plug it into a VXI mainframe as the _only_ card (no controller yet)and I get both "failed" and "access" LEDs.Another card (HP DMM) seems to behave better -- "failed"flashes for a few seconds upon power-up, then goes out.I have done the obvious checks of fuses, system voltages, etc.Is the hard simply dead, or will populating themainframe with a controller make any difference?Thanks much for any advice ...

author: coromonadalix
author_rank: Super Contributor
timestamp: October 04, 2022, 11:37:14 am
content: For an vxi or pxi frame, you need a dedicated controller / cpu ??Unless the card needs only a supply and can run autonomousNever saw this ?? a cpu module was always there ??

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: October 04, 2022, 12:33:17 pm
content: Hi rcm99,for all VXI-mainframes one needs a System-controller in slot 0.Can be a E1405/06 (GPIB and RS232) or E8491 (Firewire) orMXI-card with the cable and PCI-card in the PC.....or an embeded PC.Have you got manuals and software for the card?Best regards and good luck.

author: rcm99
author_rank: Newbie
timestamp: October 04, 2022, 03:50:07 pm
content: YesI have Docs on the Racal card and expecting a GPIB controller 1406 soon!Thanks for the reply. Sounds like I **might** not be totallydead in the water with the Racal card!
Teledyne Advisor USB software - Page 1
Forum section: electronics / testgear

author: gossamer
author_rank: Contributor
timestamp: October 04, 2022, 09:31:07 am
content: Hi, does anyone have software for Lecroy advisor usb 2.0 protocol analyzer. I tried to download it from the website but I cannot register to their site as it is disabled. I got used item of the ebay which didn’t come with software..

author: coromonadalix
author_rank: Super Contributor
timestamp: October 04, 2022, 02:11:51 pm
content: see this thread for some infoshttps://www.eevblog.com/forum/testgear/teledyne-lecroy-mercury-usb-protocol-analyzer/
What is the part number for the 34401A/3478A..HP meter gold terminals on PCB ? - Page 1
Forum section: electronics / testgear

author: opa627bm
author_rank: Regular Contributor
timestamp: October 04, 2022, 07:28:54 am
content: Hi all,I have received 2 3478A and I am going to replace the input terminal switch because the contact is bad. (My 34401A is probably due soon too）. In that case, I want to replace all the wiring to silicon wire since they are more flexible and better resistance.There are 2 kinds of end terminal lugs, one goes to PCB gold pin post and the other kind goes to the banana plugs at front and rear panels.anyone happen to know the part number so I can rebuild the cable assembly?Regards,Li
Anritsu MS560J Manual? - Page 1
Forum section: electronics / testgear

author: ruairi
author_rank: Frequent Contributor
timestamp: September 19, 2016, 04:05:18 am
content: Hi all,I'm looking for the manual (and service manual if possible) for the Anritsu MS560J Network/Spectrum Analyzer. My online searches so far have yielded nothing.Thanks!Ruairi

author: stevansan
author_rank: Newbie
timestamp: February 12, 2018, 11:58:36 pm
content: I'm also looking for this one so I'm refreshing a topic. Does anyone have a manual?

author: dalebert
author_rank: Newbie
timestamp: October 03, 2022, 06:06:09 pm
content: Still looking for the manual? I have service and operator manual. Also have the MS560j that works but the screen was cracked. It can still be used with the video out connector to a monitor.I was about to send the unit to e-waste.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 04, 2022, 01:41:48 am
content: pm sent
EDU33212A  jitter on ramp waveform and trigger out - Page 1
Forum section: electronics / testgear

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: October 02, 2022, 04:45:04 pm
content: not having much need for the ramp waveform until now, I had not noticed how bad the jitter was on the falling edge of a positive ramp and trigger out with this generator. I'm wondering if this is expected for a function generator, or if there may be something going on with my unit or this model in particular. the screenshots with the ramp waveform in channel one are moved half a period to the left to center the falling edge on the screen. Jitter is over 200ns peak to peak, and slightly worse for the trigger out signal at 100Khz.I then used a sine wave to see how much worse the trigger out jitter got at higher frequencies, and something strange happens, which I'm not even sure how to describe it, but the screenshots show it. Only at 10MHz does the trigger out jitter seems to not be present, or at least not as bad as at other frequenciesWhat do you all think about this?Thank you

author: Kleinstein
author_rank: Super Contributor
timestamp: October 02, 2022, 05:19:27 pm
content: It is normal, or at least not unusual to see quite some jitter from a digital (DDS / AWG) function genrator at most frequencies. This comes from the sampling method to genrate the signal and has natural limitations. Normally I would have expected a bit less jitter though, more like 50 ns_pp.The sine wave looks like the reconstruction filter is not doing a good job - that looks more like a somewhat unexpected weakness.

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: October 02, 2022, 09:15:30 pm
content: Quote from: Kleinstein on October 02, 2022, 05:19:27 pmThank you, I decided to also test the ramp of the generator that comes in the oscilloscope, and got the same result, then i tried the generator from the analog discovery 2 and also got the same result, so i connected the keysight generator to the analog discovery oscilloscope, and saw that the jitter there was much less, and also on a rigol oscilloscope, which matches well enough with how it looks like on the analog discovery.I now would like to see other people's ramps using these same settings: 4vpp into Hi Z, 100KHz, 100% symmetry, triggering on 0v rising edge and centering the falling edge on the oscilloscope, all images of this on different oscilloscope/generator combinations would be welcome.Thank you!Attached how it looks like on the rigol and ad2.

author: Someone
author_rank: Super Contributor
timestamp: October 02, 2022, 10:18:53 pm
content: The slow rising edge of the ramp is introducing jitter in the trigger position, try looking at the jitter from falling edge to falling edge (or referenced to a square sync signal).

author: Anthocyanina
author_rank: Frequent Contributor
timestamp: October 02, 2022, 11:00:35 pm
content: Quote from: Someone on October 02, 2022, 10:18:53 pmof course this was the reason!same ramp, triggering on a square wave, no horrible jitterThank you, Someone!
Older Agilent Multiport Test Set Software for E835xA PNA Analyzers - Page 1
Forum section: electronics / testgear

author: Forzaman
author_rank: Contributor
timestamp: October 02, 2022, 07:32:37 pm
content: Hi, I have a Agilent E5357A VNA, and can pickup a Agilent N4416A test set which expands the measurement capability to four ports. The test set requires the N4425A Balanced Measurement Software however loaded on a PC, which doesn't come with the unit and Keysight does not provide anymore. Apparently this software works with other N441xA series test sets and their older ATN-4111x counterparts as well.Does anyone have experience using any of these test sets with the N4425A software? If so, can you tell me if the software requires a license?Thanks!
tds744a not completing boot - Page 1
Forum section: electronics / testgear

author: durresaku13
author_rank: Newbie
timestamp: October 01, 2022, 03:28:40 pm
content: hi everyone.im new to the site and to the scope journey.i was given this scope made by tektronics. when i turn it on, starts to boot led lights turn on for a brief moment then the display shows only a horizontal line on the top, both ends of that line have a tiny vertical line-ends.no other item shows up. no grid no nothing. can someone please tell me if is any solution to this, or is it gone to the point of no return.and what other info is needed to help identify the problem.thank you all.

author: nctnico
author_rank: Super Contributor
timestamp: October 01, 2022, 03:34:20 pm
content: Did you try to connect an external (VGA) monitor?

author: durresaku13
author_rank: Newbie
timestamp: October 01, 2022, 04:20:46 pm
content: thank you.i did butshows the something.

author: nctnico
author_rank: Super Contributor
timestamp: October 01, 2022, 04:33:09 pm
content: In that case you'll need to dig deeper. The fact you see the same on the internal and external monitor (at least that is what I assume you mean by your last post) is an indication the display part is still working.Tektronix has a component service manual for a similar DSO of theirs:https://download.tek.com/manual/070971003.pdfIt is not 100% identical but you can use the diagnostics and diagrams to get an idea of what you are dealing with.

author: durresaku13
author_rank: Newbie
timestamp: October 01, 2022, 06:05:56 pm
content: thanks.im new to scopes and i find them very complex instrument. what about the digital segment inside the scope. would that tell me anything? and also the dip switches any particular on/ off position?thank you again.

author: nctnico
author_rank: Super Contributor
timestamp: October 01, 2022, 06:11:15 pm
content: Setting the diagnostic dipswitches and look at the 7 segment display what code it produces will certainly help to diagnose the problem but from there you'll need to understand what is going on and what may be the actual problem. First check to do is whether the diagnostic dipswitches are set correctly for normal operation and whether all connectors / cables are seated properly. Also make sure to check whether all supply voltages are within their specified limits.So basically:1: check all connectors (are all cables that should be there fitted and are they mounted correctly?). IIRC you can connect the cables / boards that distribute power & logic signals the wrong way or swap them causing the oscilloscope not to work.2: set the dipswitches to normal operation3: check all power supply voltages4: perform diagnostics using the dipswitches & 7 segment display if the previous steps didn't cause the oscilloscope to work normally
Replace or repair oscillator in HP 5245M? - Page 1
Forum section: electronics / testgear

author: deafen
author_rank: Contributor
timestamp: October 01, 2022, 12:20:07 pm
content: I picked up this cool nixie counter recently and finally tested it last night. It works great, but only with an external clock source, and there are several wires around the oven that are disconnected or cut and taped. I'm assuming that means that the oscillator malfunctioned, and the last owner used an external clock and disconnected the oven to save the heat.I don't use a central time source, so my options seem to be to repair the stock oscillator, or leave it unhooked and jimmy in an oscillator IC. I know that the 5245M's big claim to fame is the stability and accuracy of the oscillator, but frankly I dabble in AF and don't have much use for ppms. (I was also going to play around with using a voltage to frequency converter to use it as an absurd voltmeter.)Am I correct in thinking that I should just run a cheap clock oscillator and be done with it?

author: TimFox
author_rank: Super Contributor
timestamp: October 01, 2022, 01:50:40 pm
content: You can get reasonable OCXOs on eBay, presumably removed from equipment in the Far East.

author: deafen
author_rank: Contributor
timestamp: October 01, 2022, 02:31:18 pm
content: Hadn't even considered that, glad I asked! What would you consider to be a reasonable OCXO? There are used branded ones that are just the OCXO itself for around $25 shipped (https://www.ebay.com/itm/403749293289), or there are new ones with an unlabeled component, but a complete board including freq adjustment for a little less (https://www.ebay.com/itm/394198674605- also does both TTL and sine, and I don't know which I need).
Mars Gazelle Functional Tester? - Page 1
Forum section: electronics / testgear

author: Richard_Fry
author_rank: Contributor
timestamp: September 30, 2022, 09:27:47 pm
content: Hi All,Wondering if any one has any recollection of something that I think was called a Mars Gazelle.This was an all-in-one ATE / FT setup with built in CRT and DAQ/relay cards.This was around the early - mid '90s that I was using it in the UK, but my feeling is that it was a bit long in the tooth then.My recollection of conversations with colleagues as the time was that this was a unit that the company (Mars?) used in-house to test their other products - that they they decided to sell as a standalone tester.Just trying to scratch a nostalgia itch and wondering if anyone has any information/photos etc.My google foo brings doesn't seem to work for this.Many thanks, Rich.
Tektronix TDS 500,600,700 Disc Drive - Page 1
Forum section: electronics / testgear

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: September 29, 2022, 04:25:45 pm
content: I have a TDS784D with a damaged floppy drive, so had to scavenge one from another scope. Now I am looking to replace the floppy with a USB floppy emulator that supposedly is a one-for-one fit with the original. My intent is to upgrade the scope I'm using and put the scavenged drive back in the donor unit and get it ready for sale. So my question: do any of you have experience with the drive emulator shown below.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 29, 2022, 04:36:20 pm
content: Since its written on the sticker tektronix compatibility, i think it should be fine ??Ask the seller just in case to be sure, and or some warranty it will work in the given models

author: nctnico
author_rank: Super Contributor
timestamp: September 29, 2022, 09:38:05 pm
content: Quote from: Ground_Loop on September 29, 2022, 04:25:45 pmYes. Total crap. Don't even bother.A while ago I bought a Prologix GPIB ethernet interface for 200 euro (new). This plugs into every piece of digital test equipment out there and with a simple Python script you can read data and images from the devices. Way better compared to messing with floppy disks or emulators.
Fieldpiece multitester clamp meter, strange failure! - Page 1
Forum section: electronics / testgear

author: unknownparticle
author_rank: Frequent Contributor
timestamp: September 28, 2022, 08:01:53 pm
content: My Fieldpiece SC680 clamp meter failed, whilst sitting in it's storage case, doing nothing!I was was at the bench working on something when I heard a loud, clicky sprong sound!! Had no idea what it was and could see nothing obvious so I continued my work. A little later I had need to use the SC680, removing it from it's case I went to open the clamp and it was floppy with no spring action. Thats when it dawned on me what that strange sound heard earlier was!I removed the outer casing to examine the mechanism and found the pivot of the moving jaw had just broken! This meter has had virtually no use since I bought it new about 5 months ago, so this must either be fatigue or had been dropped at the factory or the distributor or something.Contacted Fieldpiece and although it's under warranty they wouldn't supply the part for me to fit, it has to be returned to the dealer to be exchanged for a new meter!Anyway, pictures :-
HP power supplies good price now - Page 1
Forum section: electronics / testgear

author: Jester
author_rank: Frequent Contributor
timestamp: September 30, 2022, 09:47:04 pm
content: Seems like newbies are often looking for a low cost good quality power supply. I have no affiliation with this seller, but have purchased from them in the past with good experiences.I have all the power supplies I need, but if I needed another of this style I would have bid. $20 is a good deal IMHO.I think they have a two or three at the moment various iterations of this style.https://www.ebay.com/itm/334576865648?epid=1324004370&hash=item4de655d170:g:vnMAAOSw-W1jNiUo&amdata=enc%3AAQAHAAAAkAnSEVhZP3S3JyJO3RpDEDUpxWB0lAvUmLte9mNKcfBJDcWydvVdbcPvQlQWt9kUAFlxcbphEmusYmNE2Ftk%2BKWUUDdXWMBRds8DqXX3HIDpJcvg78T4%2BwXDw7uZSVvKsFZW2dDAnqjGNoxWiqAceOZgX%2BDN5RUJIr0AmgWolZ3tcWAMzV%2BBCdBPJq3su6AXWg%3D%3D%7Ctkp%3ABk9SR6KYkIbyYA

author: JOFlaherty
author_rank: Contributor
timestamp: October 01, 2022, 04:38:50 am
content: They seem to want $55.41 for shipping, for a total of $75.40.

author: alm
author_rank: Super Contributor
timestamp: October 01, 2022, 07:15:54 am
content: And it's an auction with over five days to run, and is likely to finish well above its asking price, especially if you focus attention by posting about it on a forum.For buy it now listings with good prices I think sharing it makes sense because it goes to whoever buys it first. But with an auction with a 7 day runtime anyone really interested should be able to find it in those 7 days, and having more people bidding just means everyone pays higher prices.

author: Gyro
author_rank: Super Contributor
timestamp: October 01, 2022, 10:50:32 am
content: I've often observed that the tempting items like that, with suspiciously zero or few bids, are the ones that get a huge number of snipe bids in the last minute.

author: BeBuLamar
author_rank: Super Contributor
timestamp: October 01, 2022, 11:45:09 am
content: That's the starting bid. The wining bid could be a lot higher.

author: unknownparticle
author_rank: Frequent Contributor
timestamp: October 01, 2022, 01:03:21 pm
content: They don't ship outside the US either.

author: Jester
author_rank: Frequent Contributor
timestamp: October 01, 2022, 01:29:47 pm
content: At the time I posted, there was 1 hour remaining and it ended with no bids so it was relisted. This was actually the second time around with no bids, they keep dropping the price. I guess everyone wants new and blingy vs. old and reliable?BTW regarding shipping, the ad states no international shipping, however several years ago they had something I really wanted and I called them to see if they would ship to Canada and they did. I do wish that more vendors would take advantage of the Global shipping program it is one of the few aspects that seems to work reasonably well on eBay.Let's see if it sells this time around, or they drop the price to $9.99?Looks like it sold for $34
Do anyone have the information of the RIGOL DS1102CA - Page 1
Forum section: electronics / testgear

author: jacycao
author_rank: Newbie
timestamp: June 23, 2022, 01:17:06 am
content: Dear manito, I just purchase a DS1102CA, I know it is very old, but the 2GSa struck me the most~I don't know who use this unit? And it seems could update to DS1202CA or DS1302CS.

author: Xenador77
author_rank: Newbie
timestamp: September 28, 2022, 01:42:51 pm
content: Same here, bought a DS1102CA that needed a few rotary encoders replaced. I salvaged them from my old ADS1102CA which is the Atten/Gatten model that is mostly the same, but worse in every category.I'm not sure about modding it, but I'm somewhat familiar with Verilog/FPGAs. Maybe I'll find something interesting/worth modding without bricking my scope.I can send links to the manuals (or you can google Rigol DS1102CA like I did) and links to the Ultrascope for 1102CAs if you haven't already found it elsewhere.
NI VISA for keysight instrument (windows 11) - Page 1
Forum section: electronics / testgear

author: Sarke
author_rank: Newbie
timestamp: September 30, 2022, 07:30:05 am
content: Hi,The only post I found talking about VISA drivers on windows 11 washttps://www.eevblog.com/forum/testgear/windows-11-gpib0-no-communication-with-ke5fx-gpib-toolkit/msg4097404/#msg4097404but it wasn't quite what I was looking for.Currently, the latest IO lib suite from keysight doesn't explicitly mention windows 11 on the compatibility list. The NI VISA driver however does. Has anyone been controlling keysight hardware using the NI drivers on windows 11 and know if it's stable? Specifically, I have a bunch of 34972A and 970A dataloggers and use Python (3.7 on win10 atm).

author: alm
author_rank: Super Contributor
timestamp: September 30, 2022, 09:37:44 am
content: I haven't tested this, but I can't imagine the device caring what software is running on the other end of the GPIB cable. If you're talking about a package like BenchVue, it might be different, but for Python I don't think it would make a difference.

author: Tony_G
author_rank: Super Contributor
timestamp: September 30, 2022, 02:55:00 pm
content: I've been using the latest NI-VISA & NI-488.2 packages on Windows 11 to control older HP gear (e.g. HP 8902A, HP 8673B, etc) without issue via a NI GPIB-ENET/1000.However, I don't use Python or any intermediary libraries just C# directly to the NI-VISA .NET API so YMMV, etcTonyG

author: tchiwam
author_rank: Regular Contributor
timestamp: October 01, 2022, 04:42:54 pm
content: https://github.com/tchiwam/GPIBGot tired to play with NI-VISA and made this... a bit simplistic but it works with all my gear.
Siglent SSG5000A 13.6 and 20 GHz RF Sig Gens - Page 1
Forum section: electronics / testgear

author: tautech
author_rank: Super Contributor
timestamp: April 12, 2021, 02:52:57 pm
content: SSG5083A 13.6 GHzSSG5085A 20 GHz.Release 26 Sept 2022SSG5083A 9 k ~ 13.6 GHz$16,210SSG5085A 9 k ~ 20 GHz$19,070OptionsSSG5080A-PU Pulse modulation (software license)SSG5080A-PT Pulse train generator (software license)SSG5080A-LP 110dB Attenuator module （hardware, assembled and calibrated in factory only)Level setting range: -130 dBm ~ +25 dBmOutput frequency resolution up to 0.1 HzPhase noise <-120 dBc/Hz@1 GHz, offset 20 kHz (typical value)Amplitude accuracy ≤0.7 dB (typical value)Support AM/FM/PM analog modulation, support internal and external modulation methodsSupport pulse modulation function (optional), pulse train generator, user-defined pulse sequence (optional)Power meter control kit for and line loss correctionSupports web remote control5-inch capacitive touch screenRich communication interface: standard USB-HOST, USB DEVICE (USB-TMC), LAN (VXI-11, Socket, Telnet), optional GPIBEnglish datasheet:https://int.siglent.com/u_file/download/22_09_23/SSG5000A_Datasheet_DS0805A_EN02B.pdfhttps://int.siglent.com/products-overview/ssg5000a/https://siglentna.com/rf-generators/ssg5000a-series-rf-signal-generator/https://www.siglenteu.com/rf-generators/ssg5000a-series-rf-signal-generator/

author: tautech
author_rank: Super Contributor
timestamp: September 26, 2022, 08:54:34 am
content: Released today to coincide with the release of the new Siglent SSA5000A analyzers.OP updated with links, pricing and specs.

author: graybeard
author_rank: Frequent Contributor
timestamp: September 26, 2022, 08:28:48 pm
content: The +25 dBm output is impressive at that price.

author: switchabl
author_rank: Frequent Contributor
timestamp: September 26, 2022, 09:15:05 pm
content: That's just the setting range though, the actual max. output power depends on the frequency (13/15 dBm @ 20 GHz with/without mechanical step attenuator option).
HITACHI VC-7104 - for 137$ good deal ?  - Page 1
Forum section: electronics / testgear

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 23, 2013, 08:44:05 am
content: heyI was offered 137$ for that HITACHI VC-7104 4CH 150 ( I think ) scope .I didn't saw the overall shape but I believe he's okay . so do you think it'll be okay as second*analogue* scope ?I do have kenwood 40Mhz analogue and the DSOX2002 70Mhz 2CH . so that 4CH and plus the 150Mhz is nice touch , don't you think so ?shall I wait and say buy some old 500Mhz 4CH tek scope and try to repair it myself ? ( ebay action )or that 150Mhz will do ? ( for now perhaps > ? )thank you in advance !

author: jebcom
author_rank: Regular Contributor
timestamp: April 23, 2013, 11:39:03 am
content: At 150 MHz if its dual timebase and is working ok I'd seriously consider it. Not familiar with that model but I had a 60 MHz V-1050F for many years and now wish I hadn't sold it. Zero level would drift with time as did cal, but not bad for the price. Take a look at it and decide if it looks and acts as well cared for.

author: EEVblog
author_rank: Unknown
timestamp: April 23, 2013, 11:52:14 am
content: It's not a bad price for a 4ch 150MHz analog scope I guess, but you could be argued that a nice 300MHz+ Tek might be money better spent?I cannot find that model on Google

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 23, 2013, 12:57:04 pm
content: Quote from: EEVblog on April 23, 2013, 11:52:14 amyup - you can only see few pics

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 23, 2013, 01:34:59 pm
content: I found it mentioned in a few places, looks like it is a 100 MHz scope with a max sample rate of also 100 Mhz...

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 23, 2013, 01:45:05 pm
content: heyI don't know If I sall post it here or open new threadanyhow - I have got offer for 4 CH TEKTRONIX TDS 540 , for 300$the catch is that the unit does not workingI have no fear to trouble shoot the beast . But the question is : is this worth it >?I kindly uppreciate any opinion - thanks !

author: EEVblog
author_rank: Unknown
timestamp: April 23, 2013, 01:51:01 pm
content: Quote from: eevblogfan on April 23, 2013, 01:45:05 pmNo, those Tek scopes use unobtanium components!

author: eevblogfan
author_rank: Frequent Contributor
timestamp: April 23, 2013, 01:53:25 pm
content: heyreally ? if the beast don't turn on the PS is bad hence I was thinking of bad leaking high ESR caps , Wrong path ?I thank you for warning me

author: autoelectra
author_rank: Contributor
timestamp: September 26, 2022, 11:05:08 am
content: Has anyone a calibration manual?Some capacitors have lost capacitance or are short-circuited, coils are also burnt out, so a new calibration is necessary. I know, this ist an old guy and thread, but I like this scope.Best regardsOliver
Help Identifying SMD in DE-5000 - Page 1
Forum section: electronics / testgear

author: cdrat
author_rank: Newbie
timestamp: September 25, 2022, 05:08:02 am
content: I obviously was careless because my DE-5000 has been dead-on reliable and I must not have discharged a capacitor before testing. My DE-5000 is now giving measurements that do not correlate with any other testers. Encouraged by this forum I opened it up looking for bad resistors. I found one that I thought was labeled "514" (which would be 510 kΩ) but was puzzled by the numbering. There is clearly a line beneath the "1". I have attached a photo. Sorry, a newbie question. Thanks in advance.

author: Martin72
author_rank: Super Contributor
timestamp: September 25, 2022, 09:04:32 am
content: Hi and welcome to the forum.I strongly guess that this is indeed a 510k resistor, you can check it with a meter and thin measure tips.The chance that it´s defective is low, because of its high resistance.Follow the path of the input sockets to the chipset, checking the parts in this way.Hopefully there are somekind of overvoltage protection elements in there, otherwise....Good luck!

author: cdrat
author_rank: Newbie
timestamp: September 25, 2022, 12:09:40 pm
content: Thanks so much for the reply! Your suggestion makes total sense. Another slap the forehead moment for me. Thanks much, I will follow up.

author: MarkF
author_rank: Super Contributor
timestamp: September 25, 2022, 02:46:59 pm
content: Have you seen this?It was posted elsewhere for people who blew out the front-end by not discharging a cap.I forget which component is typically taken out since I don't have a DE-5000.

author: cdrat
author_rank: Newbie
timestamp: September 25, 2022, 02:57:12 pm
content: I have not!! This is great, thanks so much!!! I had no idea this sort of information might be available.I guess my earlier search was not as thorough as it should have been.

author: BravoV
author_rank: Super Contributor
timestamp: September 25, 2022, 03:19:17 pm
content: Also, once you fixed that resistor, then do a check up on the reference pin, or do calibration if needed too.Source ->https://www.eevblog.com/forum/testgear/der-ee-de-5000-unboxing-and-teardown/msg1541213/#msg1541213Recommenced to bookmark that particular post.For others with Mastech MS-5308 (used the identical Cyrustek chip sets), based on above info, I also made this with close up shot in the below post.->https://www.eevblog.com/forum/testgear/mastech-ms5308-lcr-meter-with-esr-measurement-on-discount-at-the-moment/msg1542980/#msg1542980

author: cdrat
author_rank: Newbie
timestamp: September 25, 2022, 03:34:05 pm
content: Great, thanks, studying it now.
HP 8566B RF interconnect cable - Page 1
Forum section: electronics / testgear

author: Bill Woodbridge
author_rank: Contributor
timestamp: September 23, 2022, 12:08:06 pm
content: I’ve just taken the plunge and bought the mighty 8566B, complete with YTO Unlock problem (on 2 – 22GHz only) that I’m sort of looking forward to investigating.But I have a simpler query please. My unit came with what seems to be a third-party RF interconnect cable – the connector shells are black and flimsier than the battleship-like HP genuine article (the 50-pin digital bus interconnect however definitely is the genuine article). More concerning than the cosmetics is that my cable has three subminiature coax connectors, whereas I know the genuine HP cable has four. Despite this, (although I’ve barely scratched the surface) I can’t see anything obvious that isn’t working on the instrument.Looking at the IF/display section troubleshooting manual, the missing connector corresponds to J1-5, labelled as ‘IF OUTPUT TO FREQUENCY COUNTER’, which is a signal going back into the RF section from the IF/display section. But I can’t find any reference to this signal as an input to the RF section – for example, I can’t see it on the overall block diagram in the RF section troubleshooting manual.Is this signal perhaps only relevant to the 8568B RF unit (unfortunately I don’t have the troubleshooting manual for that, but I know its other documentation mentions an ‘internal frequency counter’ and that its architecture is completely different to the 8566B)? Apologies as always if this information is somewhere on the forum - I did do a search but might have missed it.Thanks for any help, Bill

author: Bill Woodbridge
author_rank: Contributor
timestamp: September 25, 2022, 09:15:56 am
content: I think I've now answered my own question. Disconnecting the RF cable from the RF section (which I should have thought of before - when I bought the unit it was only disconnected at the IF section end) I see there are only three subminiature connectors present on the 8566B RF section. Whereas the IF/display section has four.So that seems pretty conclusive evidence that the 'IF OUTPUT TO FREQUENCY COUNTER' originating from the IF/display section isn't used by the 8566B - and presumably is only needed for the 8568B.Thanks to those who read this.
Calibration Password for Martel Calibrator - Page 1
Forum section: electronics / testgear

author: Chance92
author_rank: Regular Contributor
timestamp: September 23, 2022, 11:42:27 pm
content: I've recently bought a used Martel MC-1010 calibrator. The output appears to be out of spec, so I'm planning to make some adjustment. However, the calibration menu is password protected. I wonder if anyone know what the password is? The PCB has a marking of "MC1200", so I suppose the password may be the same as the MC-1200 series.

author: alm
author_rank: Super Contributor
timestamp: September 23, 2022, 11:51:07 pm
content: I've never heard of Martel before, but with other manufacturers things like 0000 or the model number are common default password. Do you know how many characters the password is? Did you try a bunch of the obvious ones?

author: Chance92
author_rank: Regular Contributor
timestamp: September 24, 2022, 12:28:25 am
content: Quote from: alm on September 23, 2022, 11:51:07 pmI think they were acquired by Fluke back in 2012. They were probably involved in the development of some of the Fluke's handheld calibrators. I believe the password is 3 or 4 digit long. I have tried the common ones but no luck so far. I'm also trying to write a script to run every possible combination through it.

author: Chance92
author_rank: Regular Contributor
timestamp: September 24, 2022, 05:27:46 pm
content: The script worked! The password is 900. Use CR as terminator.