hybridfree/eevblog-posts huggingface dataset:
Agilent 53147A / 53148A / 53149A OCXO upgrade - Page 1
Forum section: electronics / testgear

author: Rubo
author_rank: Regular Contributor
timestamp: July 19, 2025, 02:45:18 pm
content: A few days ago the fan in my 53147A started making noise. After opening it to change the fan, I noticed a larger footprint around the factory XO.Since the factory XO is downright atrocious (it drifts with time, temperature, direction of the wind, phase of the moon, etc.), thought it will be woth it to see if I can find a better replacement.After probing around the board, 3 out of the 4 pins on the larger footprint were directly connected to the existing (smaller) XO pins. The VCC pin has a separate LM7805 regulator bolted to the side of the case instead of the PCB mounted 78M05 regulator for the factory XO. The 5th pin on the larger footprint is not connected to anything (at least as far as I can probe). You can move a 0 Ohm jumper to utilize the 5th pin, but I decided not to use it.After looking on DigiKey, Mouser, etc. found what should be a much better option (from what was available in stock and for the amount of money I was willing to spend).https://www.digikey.com/en/products/detail/taitien/NI-10M-2401/6126539One concern I had when looking for an OCXO was that the factory XO is a square wave output with a Vpp of around 4.6-4.8V, so from around 0.1-0.2V to 4.8-4.9V.Most of the OSXO's I found that were available were CMOS level, so around 3.3-3.5Vpp. After soldering the new OCXO in and powering it on, looks like the output level is not that importantOn a side note, I checked Shariar's video on 53152A (it would apply to 53150A & 53151A also), looks like the XO section of the boards are identical between all those instruments.So this upgrade might be a viable path for them too.

author: Rubo
author_rank: Regular Contributor
timestamp: July 23, 2025, 04:21:04 am
content: Just an update. After running it for 5 days the drift of the new OCXO seems to have slowed significantly.To the point that after adjusting it, it has been seating at +/- 0.2ppb for the past 24h (mostly temperature variation).LSD is moving around by +/- 8, it just happened to be be at a 0 when I took the pictrueIn the above image PM6680B, 53147A & Channel 1 of 53132A are all connected to BG7TBL GPSDOCXO.53132A is displaying the 10MHz output from the 53147A.
Uni-T UT61E+ is the same as GW-Instek GDM-541 - Page 1
Forum section: electronics / testgear

author: Doctorandus_P
author_rank: Super Contributor
timestamp: July 22, 2025, 02:55:12 pm
content: I know it's pretty common that measurement equipment gets renamed and sold under different brand names, to see the same meter from GW-Instek and Uni-T is a bit surprising to me.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: July 23, 2025, 03:28:18 am
content: I had a bit of fun with AI, (duck.ai) and it to compare these meters, and results were not so good. At first it mistook theEversion of the Uni-T for a lower resolution variant, and attempting to correct that mostly lead to the AI spitting out plausible sounding gibberish. But it did manage to do some comparisons, and it did make a side by side comparison when I asked it to do that, and shorten the table to show only the differences.It also could not answer questions such as what ADC's are used in these meters, but just gave a generic response (datasheets, manufacturer's websites).In some ways the AI response was impressive, but it definitely was not very intelligent yet.
HP RF power meter cable 11730A (resolved) - Page 1
Forum section: electronics / testgear

author: benj38
author_rank: Frequent Contributor
timestamp: July 21, 2025, 10:25:01 pm
content: I need a custom length version of the HP 11730A power meter cable. Does anyone know how hard it is to make one?I guess the cable itself is a shielded multi-conductor cable and is nothing too fancy, but I have no idea what the connectors are.I see all kinds of Chinese sellers on eBay are making these, so it cannot be too difficult. Right?

author: Uunoctium
author_rank: Frequent Contributor
timestamp: July 22, 2025, 01:35:09 am
content: For me it looks like an modified Lumberg SV120 ( alternative Amphenol Series C 091 A/B/D ) witha) custom insulatorb) reduced number of contacts

author: xtech
author_rank: Regular Contributor
timestamp: July 22, 2025, 06:50:53 am
content: http://mikrofale.iq24.pl/default.asp?grupa=223849&temat=486475Connector is former DIN-12, now can be found in IEC 61076-2-106. At TME it is available as M16 connector

author: benj38
author_rank: Frequent Contributor
timestamp: July 22, 2025, 07:45:02 am
content: I actually found this thread on groups.io with good information:https://groups.io/g/HP-Agilent-Keysight-equipment/topic/a_homemade_diode_power_sensor/28194882?page=5Thanks all.
fluke solder mask - Page 1
Forum section: electronics / testgear

author: boful
author_rank: Contributor
timestamp: July 21, 2025, 04:38:18 am
content: Greetings..Just very very curious, the purpose of the checker mask on the Fluke PCB. Attached picture is from a Fluke 77 series II.It is the COMMON connection, top side of PCB, above U1.Thanks

author: BILLPOD
author_rank: Frequent Contributor
timestamp: July 21, 2025, 07:47:45 pm
content: Good Morning Boful, I don't see a U1 in the photo, or am I not seeing the forest through the trees?

author: tooki
author_rank: Super Contributor
timestamp: July 21, 2025, 10:01:24 pm
content: Quote from: boful on July 21, 2025, 04:38:18 amThe square pattern isn't in the solder mask. (The solder mask is the transparent green coating.) The dark squares are just square holes in the copper pour. In the past, this was done to reduce warping during soldering.

author: EvgenyG
author_rank: Regular Contributor
timestamp: July 22, 2025, 03:37:35 am
content: Might be a good idea to replace that cracked capacitor while you're there.

author: picburner
author_rank: Frequent Contributor
timestamp: July 22, 2025, 03:54:51 am
content: Quote from: EvgenyG on July 22, 2025, 03:37:35 amThat notch is intentional, not a broken capacitor. It's a spark gap.
Hakko FR-400 Vs JBC DT530 Desoldering Tool - Page 1
Forum section: electronics / testgear

author: 2X
author_rank: Frequent Contributor
timestamp: July 20, 2025, 06:56:32 am
content: Hi,I am a JBC user and I am pleased with them. I have never use any hakko tool. I want to buy a desoldering station so I can desolder terminal connectors or big capacitors from photovoltaic inverters where are soldered in big ground planes on PCB.Do you knlow if Hakko FR-400 is more powerfull than JBC DT530?On specs I saw Hakko tool is 300W and JBC DT530 is 150W but I am not sure if these values are comparable between two brands.Hakko FR-400 desoldering stationhttps://eleshop.eu/hakko-fr-400-desoldering-station.htmlDT530 Iron Angled Desolderinghttps://www.jbctools.com/dt530-angled-desoldering-iron-product-2373.htmlMSE Module Electric Desoldering for DDE & DMEhttps://www.jbctools.com/mse-electric-desoldering-module-for-dde-dme-product-2581.htmlDDE Control Unit 2-Toolhttps://www.jbctools.com/dde-2-tool-control-unit-product-919.htmlDTS Stand for DT530https://www.jbctools.com/dts-stand-for-dt530-product-2861.htmlD530 Tip Range for DT530https://www.jbctools.com/d530-tip-range-product-2585.html

author: KungFuJosh
author_rank: Super Contributor
timestamp: July 20, 2025, 04:39:25 pm
content: The Hakko claims it delivers higher temperature and power. Pressure seems to be about the same, despite them using inconsistent terms to make that less clear.
SMD fixture adapter for axial fuxture - Page 1
Forum section: electronics / testgear

author: d-el
author_rank: Regular Contributor
timestamp: July 20, 2025, 04:36:57 pm
content: Easy way to fix SMD component in Axial fixture.This method gives a highly accurate result and repitable. During using, I realized that it would be better to fix one of the pogo pin with solder.
Keysight SSR Scan Card DAQM900A - Page 1
Forum section: electronics / testgear

author: voltsandjolts
author_rank: Unknown
timestamp: June 30, 2021, 12:24:29 pm
content: The DAQM900A is an SSR scan card for Keysight's new-ish DAQ970A.Looking at the board, I'm puzzled about a couple of things:1/ Unless I am mistaken, there seems to be a flyback step-up followed by Cockcroft-Walton style voltage multiplier on board, with high enough voltage to warrant caution symbols. What would that be for?2/ Why does each SSR have a "000" resistor on the switch side? Are they polyfuses?https://www.keysight.com/gb/en/product/DAQM900A/20-channel-solid-state-multiplexer-module-for-daq970a-daq973a.html

author: thm_w
author_rank: Super Contributor
timestamp: June 30, 2021, 09:52:28 pm
content: Those are just normal low inductance resistors. The SSR will fry long before the resistor.https://www.batronix.com/files/Keysight/DAQ/DAQ970A-973A-Datasheet.pdf#page=10Oddly the PDF above shows 100R resistors in the COM lines, but I don't see those on the PCB. Maybe there are custom versions where people want to specify a series resistance in there?But yeah the specs don't say why a voltage multiplier is needed here. Seems way overbuilt.Quoteedit: I don't think thats a voltage multiplier, its some sort of clamping circuit. The SMA parts are SMBJ75(C)A so maybe two in series for 150V clamping of the 120V max input? That or its limiting the total floating voltage, 6 * 75V = 450V.

author: voltsandjolts
author_rank: Unknown
timestamp: July 01, 2021, 09:58:57 am
content: Thanks for the comments.I agree on the zero Ohm resistors, perhaps there just to give the user the option of adding inline resistance for SSR protection.Good idea, clamping circuit would make much more sense than a step up.I notice ZGND labelled in that area, which is the chassis.Could be limiting the common mode voltage to within a certain limit of chassis potential, and the differential to 150V.Perhaps two SMBJ75 for the measurement bus differential, and same for sense bus, then the centre of those to another two SMBJ75 to ZGND.Hence HV warnings because its connected to the measurement and/or sense bus.Still not sure about the inductor, but yeah, clamp circuit it is.

author: sfs1
author_rank: Contributor
timestamp: July 19, 2025, 11:24:03 am
content: I recently repaired one of these and because it was not easy to find the right replacement parts, I'll post here so google and openai can index this information to prevent future suffering.The solid state relays are Panasonic PhotoMOS AQY210S. There are dual diodes on the back for the clamping protection, which are Toshiba 1SS398TE85LF (Vr = 400V)I'll add a few pictures too. In the one with the test leads I'm measuring 175V (±87.5 V relative to ZGND).
Adret 104A Issue - Page 1
Forum section: electronics / testgear

author: MattM
author_rank: Contributor
timestamp: January 21, 2025, 07:40:43 pm
content: Hi Guys,does anyone possibly have a repair manual/schematic for Adret 104A? (and willing to share)It started to output the max range voltage for each range no matter what is set on the switches, e.g. 10V range just outputs 10V even though the switches are all set to zero.Thanks!

author: coromonadalix
author_rank: Super Contributor
timestamp: January 21, 2025, 09:59:12 pm
content: some infoshttps://dabbledoo.weebly.com/adret-104a.htmlthey share the same pwm design with 103, the 103 service manual can be foundthe 104a seems impossible to find ?

author: coromonadalix
author_rank: Super Contributor
timestamp: January 21, 2025, 10:01:52 pm
content: othersa french pagehttp://adret-electronique.fr/roger_charbonnier_genie/genie_createur.html

author: coromonadalix
author_rank: Super Contributor
timestamp: January 21, 2025, 10:06:57 pm
content: 103 p1

author: coromonadalix
author_rank: Super Contributor
timestamp: January 21, 2025, 10:08:44 pm
content: 103 p2

author: MattM
author_rank: Contributor
timestamp: January 23, 2025, 09:16:29 am
content: Hi coromonadalix,thank you very much! Yes, I can't really find anything about 104A, except for what's on the dabbledoo page. I guess it is a relatively obscure brand.

author: RLMCN
author_rank: Contributor
timestamp: July 19, 2025, 06:07:41 am
content: Hello,Please forgive me for coming to this topic a bit late — I'm not sure if it's still relevant.Just in case, here is the documentation I have on the 104.These are instruments I'm quite familiar with (especially the 103), and I'd be happy to help if I can.Best regards.

author: RLMCN
author_rank: Contributor
timestamp: July 19, 2025, 06:08:16 am
content: Adret_104_Schematics

author: RLMCN
author_rank: Contributor
timestamp: July 19, 2025, 06:09:16 am
content: Adret_104_Maintenance

author: RLMCN
author_rank: Contributor
timestamp: July 19, 2025, 06:10:28 am
content: Adret_104A_Fiche_TechniqueAdret_104A_Parts_List

author: RLMCN
author_rank: Contributor
timestamp: July 19, 2025, 06:12:10 am
content: Adret_104_SubAssembliesAdret 104A Fiche Technique Provisoire
Manually adjusting HP 8673 series signal generators flatness and ALC - Page 1
Forum section: electronics / testgear

author: benj38
author_rank: Frequent Contributor
timestamp: July 21, 2025, 09:51:44 am
content: I have posted the question below to the groups.io HP-Agilent-Keysight group, but without luck, so I am hoping maybe someone here can help.*****************************I am in the process of nursing a venerable 8673A back to life, and I have reached the point of having to adjust the output level: it varies by over 6dB, as measured on an external power meter, at different frequencies (with the same setting/reading on the internal generator's meter).The 8673A (as well as other instruments in this series) service manual calls for the use of an unobtainable service program running on an HP 85 computer in order to adjust some aspects of this instrument, in particular output level flatness and ALC.Is there any way to perform this adjustment manually?Is the HP 85 adjustment program used just to give the operator instructions on how to adjust trimmers, or does it send over GPIB values to be stored inside the signal generator's memory (such as DAC values)?Any insights and suggestions are highly welcome!
New GW Instek GDS-912G oscilloscope - Page 1
Forum section: electronics / testgear

author: Hydrawerk
author_rank: Super Contributor
timestamp: July 16, 2025, 10:28:23 pm
content: A rather basic model.https://www.gwinstek.com/en-global/news_release/detail/20250715_GDS_900_Globalhttps://www.gwinstek.com/en-global/products/detail/GDS-912_GDS-912GIt looks like a rebadged Owon SDS210S with a little different front panel.https://www.owon.com.hk/products_sds200_series_digital_oscilloscope

author: tunk
author_rank: Super Contributor
timestamp: July 16, 2025, 10:53:08 pm
content: Looks like the rear covers are identical.

author: Martin72
author_rank: Super Contributor
timestamp: July 16, 2025, 10:56:28 pm
content: In times when you can get a completely different class of scopes from Rigol and Siglent for less than €500, I find such “new” models somewhat backward-looking.Unless they cost a maximum of 300, then it would be halfway acceptable.Given GW Instek's portfolio, I find it questionable whether a manufacturer like GW Instek needs to partner with Owon for low-cost models.

author: nctnico
author_rank: Super Contributor
timestamp: July 16, 2025, 11:02:25 pm
content: Looking at the Owon model, it seems to run the typical GW-Instek GUI. I think Owon is doing the rebadging. Maybe to bring a Taiwanese product onto the Chinese market more easely.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 17, 2025, 12:30:51 am
content: i would jump on the Owon than the gw instek, their support is lacking big time

author: BillyO
author_rank: Super Contributor
timestamp: July 17, 2025, 12:49:18 am
content: Yawn...

author: Hydrawerk
author_rank: Super Contributor
timestamp: July 18, 2025, 11:54:54 pm
content: https://youtu.be/1hhaz1bt_UY?si=gjg7XWQY92rF_rXM

author: DaneLaw
author_rank: Frequent Contributor
timestamp: July 19, 2025, 12:11:45 am
content: Bottom of the barrel.Aint the Owon priced around 200US (100Mhz in USA, while the 200Mhz is 50 to 100 more.Its a 480p screen (7"), but at least they seem to make decent use of the screen and the waveform can fill most of it and not too much secondary chinagang on the screen.* seems its a tad over 200 $ with incl. sig-gen and the 200MHz is 299$ so quite a bit lower regional US pricing, than the likes of Rigol and Siglent.https://www.amazon.com/OWON-Oscilloscope/dp/B0DQKT3KXY
Rigol DP900 / DP2000 fan replacement - make it quiet! - Page 1
Forum section: electronics / testgear

author: gweb
author_rank: Newbie
timestamp: July 18, 2025, 10:18:23 am
content: Just some basic info for anyone considering to change the fan in their unit, so that you know what to expect and can select an appropriate replacement without having to open the unit first.Original Fan:Sunon Maglev MF80251V1-1000C-A9980x80x25 mm12V - 1.44W3200 RPM69.6 m³/h4.6 mmH2O33.0 dB(A)2-pin connectorOpening the unit is very simple and you don't have to tamper with the warranty void sticker (at least on my unit, the sticker is at the bottom and only the top needs to be removed).Just remove the three visible screws on each side of the top panel. No need to remove any of the rubber feet.The fan cable is a bit short and needs to be disconnected while removing the top panel. The other cables can be left attached if you flip the panel on the side and support it with something.I replaced the original fan with a Noctua NF-A8-FLX, using a 3 to 2 pin adapter. It offers 75% of the airflow and about 50% of the static pressure at 16,1 dB(A), making the unit much quieter. While it's not completely silent, the main noise coming from the unit is now transformer hum that was previously covered by the fan noise.I haven't measured how the replacement affects the temperature in the unit, so no guarantees it's enough and won't affect longevity. However I have a feeling it doesn't need that much cooling at a normal room temperature of 20-22 Celsius.

author: thm_w
author_rank: Super Contributor
timestamp: July 18, 2025, 10:43:29 pm
content: Its ~40% of the static pressure. Hopefully that won't matter here, there is not much restriction. Stock fan is 3200rpm and the noctua is 2000rpm.Thanks for posting the info.
new rigol dp2000 and dp900 series - Page 1
Forum section: electronics / testgear

author: justme1968
author_rank: Contributor
timestamp: September 03, 2022, 02:20:02 pm
content: has anyone already seen and used the new rigol dp2000 and dp900 power supplies and can say something about the fan noise compared to the ds800 series?thanksandre

author: Xoff
author_rank: Contributor
timestamp: December 28, 2022, 10:05:13 am
content: The DP932E fan is quiet after the start-up burst. It has slightly higher pitch (but is less intense) than RIGOL DS1054Z fan. Overall great improvement over DS800.

author: KrzysztofB
author_rank: Regular Contributor
timestamp: December 28, 2022, 10:09:12 am
content: Never used 800 series, but I'm pretty sure 900 is same as 2000, and I don't find it annoying at all.More quiet than other power supplies we have.

author: gweb
author_rank: Newbie
timestamp: July 18, 2025, 10:22:04 am
content: My impression was that the fan noise was really annoying and loud (for a home lab) so I had to replace it with something quieter...https://www.eevblog.com/forum/testgear/rigol-dp900-dp2000-fan-replacement-make-it-quiet!/
Simple Raw I2C to SDC card data recorder-Anything out there? - Page 1
Forum section: electronics / testgear

author: djsb
author_rank: Super Contributor
timestamp: July 13, 2025, 06:38:16 am
content: I'm looking for a SIMPLE but capable raw I2C to SDC card data recorder? I don't mind building something. I've found one design in an old Elektor magazine article (will post a link below later). Are there any recent DIY designs that can be used with easily available parts and firmware or source code? I just want to connect it to an I2C bus inside a radio receiver and log the data between the MCU and the LCD controller, synthesizer, and keyboard. I have a PC based logic analyser but want something that's independent and NOT tethered to a laptop. Thanks.PS This is for a 4.4MHz MCU (MAB8440 8048 based MCU). Not sure what the bus speed is so something with timestamp capability would be good. Maybe logged to CSV for use in a spreadsheet.The attached Elektor article from March/April 2019 uses a PIC16F15313 and PIC16F1455. Reads to USB but NOT SD card. My application just needs to read short periods of activity NOT constant streaming. Also attached is anothe Elektor project from 2008.PPS Maybe this is better moved to the microcontroller sub forum?

author: tv84
author_rank: Super Contributor
timestamp: July 13, 2025, 09:10:11 am
content: Those attachs are pure interface projects. You want a standalone unit.See attach.Also:https://itp.nyu.edu/physcomp/labs/labs-serial-communication/lab-data-logging-with-an-sd-card-reader-using-spi-communication/

author: djsb
author_rank: Super Contributor
timestamp: July 13, 2025, 09:25:29 am
content: Thanks for your reply. I'm going to try the Etienne Boyer design to start off withhttps://www.elektormagazine.com/magazine/elektor-200803/18732As it uses a PIC I'm familiar with and can hopefully be made smaller and with a pin compatible PIC with more RAM etc.The link you posted can provide me with some ideas for improvement.

author: luudee
author_rank: Frequent Contributor
timestamp: July 18, 2025, 06:20:42 am
content: What a coincidence! I was just going to start a similar topic!I find myself again and again in need to record data. Sometimes for a few seconds, sometimes for a day or more.Sometimes I want to record voltage, sometimes current, and sometimes temperature.I would also like to have a basic UI and SD card storage.I saw some super expensive stuff out there that does one or the other, but it is all overkill for me.So I am thinking of using a CoreS3-SE and adding my own ADC (over SPI) board that can acceptone of multiple input boards for voltage, current, and temperature.https://docs.m5stack.com/en/core/M5CoreS3%20SEAnybody interested in that?Cheers,rudi
MSO6104A XY mode Z-Axis blanking doesn't work - Page 1
Forum section: electronics / testgear

author: JoeyP
author_rank: Frequent Contributor
timestamp: July 16, 2025, 06:09:33 am
content: I've had my MSO6104A for quite a few years now, and have only used XY mode a few times. Until now I had never tried to use Z-Axis blanking. It looks like there may be a bug - either in the scope or in my head. The symptom: After first selecting Default Setup and then setting up channels 1, 2 and 4 with X, Y and Z signals in Normal Time Mode (YT), I change the Time Mode to XY. That immediately turns OFF channel 4 (Z), but leaves channels 1 (X) and 2 (Y) enabled. The XY display works as expected except that Z-axis blanking does not happen. I have already exercised RTFM protocol, but it simply says an input to channel 4 will be interpreted with a +1.4v threshold, and when High the Z axis blanks captured samples. It doesn't mention anything about this feature being dependent upon any options or settings other than selecting XY mode. I'm hoping someone with an Agilent 6000 series scope can duplicate (or not) the problem as a sanity check. The scope is running System version 06.20.0000, Library 02.25, Graphics 02.19 and Help 06.16 with options MSO, mem8M, MST and E00.

author: 2N3055
author_rank: Super Contributor
timestamp: July 16, 2025, 10:45:37 am
content: Quote from: JoeyP on July 16, 2025, 06:09:33 amI don't have 6000 but have MSOX3000T and on it blanking channel is connected to External Trigger IN, not analog channels.And it works. I tried.

author: JoeyP
author_rank: Frequent Contributor
timestamp: July 16, 2025, 12:14:32 pm
content: Is that a 2 or 4 channel model? On 2 channel scopes they specify the Ext Trig Input for blanking. On 4 channel scopes they use channel 4 instead.

author: 2N3055
author_rank: Super Contributor
timestamp: July 16, 2025, 01:08:22 pm
content: Quote from: JoeyP on July 16, 2025, 12:14:32 pm4 channel. There is no difference for 2 or 4 CH.It might be problem with doc. Try external TrigIN.

author: JoeyP
author_rank: Frequent Contributor
timestamp: July 17, 2025, 01:38:07 am
content: Thanks for checking. The MSOX3000 series must be different in that regard. The MSO6104A has "Z" printed on the front panel next to the BNC for channel 4 (along with "X" and "Y" next to channel 1, 2 BNCs). That makes me think it's not a misprint in the user guide. The attached shows the sum total of what's said in the user guide. It's got to be either a firmware bug or there's some other dependency that I'm missing. Anyone have experience using Z-blanking on a 6000 series scope?

author: JoeyP
author_rank: Frequent Contributor
timestamp: July 17, 2025, 03:17:28 pm
content: Post-log: Just in case someone finds this thread in the future while troubleshooting similar issues, the problem wasn't the MSO6104A. It was my sweep generator! Turns out its blanking output is not properly timed with its sweep retrace. The attached shows the issue. The MSO6104A was working as specified. The fact that it turns off the LED for channel 4 when switched to XY mode, combined with visible samples acquired during sweep retrace had me convinced that no blanking was happening
Agilent 54831B not powering on after being plugged in for a while - Page 1
Forum section: electronics / testgear

author: FzR dontdie x
author_rank: Newbie
timestamp: July 16, 2025, 10:00:19 pm
content: I recently acquired an Agilent 54831B (i successfully uphacked it to 54832B) and it is in near mint condition, i replaced the cmos battery and thermal paste and it turns on and runs great when first plugged in, however once the unit has been turned off and sits for several hours the power button stops working and i must unplug the unit for about a minute before it will power on again. Any help on identifying a cause would be greatly appreciated.
Time from NPL / MSF / Rugby time signal receivers? Like the Fluke 207-1 - Page 1
Forum section: electronics / testgear

author: Thomas Ballantine
author_rank: Contributor
timestamp: July 16, 2025, 02:27:55 pm
content: Was/is there any test equipment configured to use the Rugby/NPL/MSF time signal? Or does WWVB equipment work with the carrier wave from it OK, and ignore the encoding on it?

author: tautech
author_rank: Super Contributor
timestamp: July 16, 2025, 03:23:50 pm
content: Some DSO's without a RTC use NTP over LAN for real time captures/stamps.SDS1000X-E and SDS800X HD ranges are examples.

author: Thomas Ballantine
author_rank: Contributor
timestamp: July 16, 2025, 05:03:18 pm
content: Sorry, I'm referring to the radio signal broadcast fromhere

author: tautech
author_rank: Super Contributor
timestamp: July 16, 2025, 09:23:05 pm
content: Quote from: Thomas Ballantine on July 16, 2025, 05:03:18 pmYes I used to tune into it here in NZ when I was a kid well knowing it came from the northern hemisphere, half a world away.I imagine NTP and GPSDO has entirely replaced it.https://en.wikipedia.org/wiki/Network_Time_Protocolhttps://en.wikipedia.org/wiki/GPS_disciplined_oscillator
Meguro MSG-3100 HD Radio Vector Signal Generator Software - Page 1
Forum section: electronics / testgear

author: pac1085
author_rank: Regular Contributor
timestamp: July 16, 2025, 07:17:11 pm
content: Hi,Does anyone have the software CD-ROM for Meguro MSG-3100/3100A HD Radio Vector Signal Generator, and would be willing to share? A datasheet and manual would be nice too. I can't find too much info on these but it is a capability I would like to have and the price is right on some used units I see.Thanks!
Hscope on Android phone - Working! - Page 1
Forum section: electronics / testgear

author: hijoton
author_rank: Newbie
timestamp: July 16, 2025, 02:09:43 pm
content: Hi gents!I write this from Uruguay, even down here we know of the legendary EEVblog.Long story short.I used a OWON VDS1022I (isolated version) and tried the Hscope app.Did not work on my Samsung a6 tablet, also a nope on my Motorola G7 power.But Martin Loren did a great step by step guide to diagnose.I used a OTG adapter for the usb and it started working at once when connecting with my phone with a USB-C connector.Caveat, from the get go, I connected the probe to the calibration pin.I also have a mini usb OTG adapter to use with the tablet. But it did not work.It is my understanding that the problem is that the mini usb does not provide enough current to boot the device.
DE-5000 IR to USB with power. - Page 1
Forum section: electronics / testgear

author: MaxPi
author_rank: Newbie
timestamp: July 16, 2025, 06:19:57 am
content: Hi everyone!I've seen a few threads here on the forum about IR interfaces for the DE-5000, but they all assume the device will be powered by a separate power supply or batteries.But why should we need another power source, when we already have USB right there?This is a USB interface for the DE-5000 LCR Meter that also powers the device from USB. Since it uses an isolated 5V-to-9V DC/DC converter, the meter remains electrically isolated during operation.I decided to share this in case anyone else is interested — here’s the link to the print files:https://www.thingiverse.com/thing:7092984
Fluke 73 PCB Battery Terminal - Page 1
Forum section: electronics / testgear

author: boful
author_rank: Contributor
timestamp: July 16, 2025, 06:27:04 am
content: Greetings...Fluke 73 Series II ...Old Fluke, but my daily driver due to ease of use.Sadly, one of the PCB 9V battery terminal (-) has broken.Specifically, the riveted head the battery terminal inserts inStill have the riveted head, but before I attempt to solder repair etcI Have been looking for replacement PCB terminal, no luck.Any Ideas on where I might find one. The part is not listed in the service manualOr any ideas on repair tips.Thanks

author: Uunoctium
author_rank: Frequent Contributor
timestamp: July 16, 2025, 07:04:27 am
content: What about reusing of crown-contacts from old 9V batteries?

author: floobydust
author_rank: Super Contributor
timestamp: July 16, 2025, 07:38:29 am
content: Look atKeystone Electronics#594, #593.

author: boful
author_rank: Contributor
timestamp: July 16, 2025, 11:39:27 am
content: Dimensions look correct .. Just ordered a couple of male and female.Thanks

author: floobydust
author_rank: Super Contributor
timestamp: July 16, 2025, 06:43:18 pm
content: Let us know how it works out.I'll mention that it takes an awful lot of heat to desolder these, your technique must be good, with good heat transfer to the soldering iron. Just to avoid wrecking the PC board.I'll use (two handed) desoldering gun on one side, and a soldering iron (big tip) on the other side of the pin heating it up.The Keystone datasheet shows the contacts available as a seperate part; female socket #269, male stud #261 but these are rivet mount and you'd have to have that.Difference between Duracell and Energizer 9V terminals, I find the Duracell always fit poorly and trash the connector.

author: Wrenches of Death
author_rank: Regular Contributor
timestamp: July 16, 2025, 10:04:11 pm
content: Quote from: boful on July 16, 2025, 11:39:27 amI've used a number of these over the years. So far, in every application, if it looked like it was the same and would fit, it did.I tin these and wipe the excess solder off before placing them on the pc board. It makes it a lot easier. Also, I use multicore or a similar quality LEAD based solder and I've never had a problem.WoD

author: boful
author_rank: Contributor
timestamp: July 19, 2025, 05:00:00 pm
content: thanks....replaced no problem.. having plenty of flux, good solder sucker, and METCAL IRON and going slow really helps ...
ET 4410 vs Ruo Shui 4090C - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: July 15, 2025, 12:26:28 pm
content: I am considering an LCR meter. Which of these would you buy today? I do not need continuously variable freq so these are the two I am considering.THANKS!Dewey

author: Martin72
author_rank: Super Contributor
timestamp: July 15, 2025, 12:38:20 pm
content: QuoteIt doesn't matter, they're both the same...Edit:https://www.eevblog.com/forum/testgear/east-tester-et4410-desktop-lcr-meter/msg3989009/#msg3989009In this thread, we have covered pretty much everything there is to know about ET4410, including clones from Mustool and others.
Rohde & Schwarz VCA: looking for manuals and software/firmware - Page 1
Forum section: electronics / testgear

author: Bicurico
author_rank: Super Contributor
timestamp: July 10, 2025, 05:38:18 pm
content: Hello,I bought a Rohde & Schwarz VCA (Video Component Analyser). The price was great and I wanted to have one to further improve my own software (https://vma-broadcast.com/).While I do have a (free) GLORIS account, I am unable to find any document or file relative to the R&S VCA (1052.4003.02).I wonder if anyone here has a better access and could provide me with documentation, software and firmware.Regards,Vitor

author: tv84
author_rank: Super Contributor
timestamp: July 10, 2025, 10:29:04 pm
content: Brochure and FW.

author: Bicurico
author_rank: Super Contributor
timestamp: July 11, 2025, 06:30:02 am
content: Thanks!Where did you find the FW?

author: Qw3rtzuiop
author_rank: Frequent Contributor
timestamp: July 11, 2025, 09:15:17 am
content: Quote from: Bicurico on July 11, 2025, 06:30:02 amThe firmware is available at gloris. but nothing else. That is typical for older systems. More rights in gloris wont give you access to the old stuff.

author: pdenisowski
author_rank: Super Contributor
timestamp: July 11, 2025, 10:48:47 pm
content: Quote from: Qw3rtzuiop on July 11, 2025, 09:15:17 amI was actually shocked to see that FW in GLORIS - it's ~25 years old.And yes, the FW was the only thing I found there ... and I presume I have as much access rights in GLORIS as anyone

author: Bicurico
author_rank: Super Contributor
timestamp: July 12, 2025, 05:05:45 am
content: Thanks!I was able to extract the SCPI comands from the firmware (which is why I asked for it - the device came with this v4.10 installed).When I have some time I will see if I can build my own remote control software.
Sorensen DHP Series Power Supply RS232 Control Hack - Page 1
Forum section: electronics / testgear

author: jmurray
author_rank: Regular Contributor
timestamp: July 09, 2025, 04:02:55 am
content: For anyone who is using a Sorensen DHP series power supply and wishes they had the RS232 SCPI feature, I have worked out how to enable it.I am not able to provide extensive advice on the process, so you will need to be familiar with reading/writing DIP memory ICs and have a suitable device to do so (we used a MiniPro programmer).Configuration data and calibration constants are stored on the Dallas DS1230Y NVRAM; U5 on the front control panel PCBA.Changing the value of address 0x084A from 0x00 to 0x01 enables the RS232 SCPI remote control option that would have been an additional fee back when these were built.The RS232 port is J10, next to the NVRAM.Pinout is:3 RX5 TX9 GNDLooks like it was probably designed to connect straight to a DE9 male ribbon connector, as the pins line up with 2, 3, and 5 respectively.Posting it here because I needed to put it somewhere in the wild so that it might help someone.

author: jmurray
author_rank: Regular Contributor
timestamp: July 11, 2025, 02:51:39 am
content: I've updated the above post, as I was encountering a bug. It seems that only bit 0 needs to be set, so 0x084A should be changed to 0x01, not 0xFF.
N2790A probes - Page 1
Forum section: electronics / testgear

author: chilternview
author_rank: Frequent Contributor
timestamp: July 10, 2025, 01:56:35 pm
content: Anyone use these on a Keysight scope? I'm curious to know if the autoprobe interface can set the attenuation of the scope according to the 50x/500x switch on the probe. The documentation says you need to set it manually, but then what's the point of autoprobe (apart from supplying power)?

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: July 10, 2025, 11:26:35 pm
content: I do not remember this one but I tend to believe that they stated whole in here:"The probe is compatible with Keysight’s AutoProbe interface with 1 Mohm input where the probe’s power is supplied by the Keysight oscilloscope’s probe interface."so power delivery interface for this one presumably as it was an avaiable option and we add trendy name on box

author: mkissin
author_rank: Regular Contributor
timestamp: July 11, 2025, 01:40:57 am
content: I use these all the time and yes, you do need to manually set the attenuation.The scope knows that only 50x and 500x are possible, but for some reason doesn't know which is active.
Exact Model 119 Function Generator - anyone got schematics? it misbehaves. - Page 1
Forum section: electronics / testgear

author: LinuxHata
author_rank: Frequent Contributor
timestamp: July 10, 2025, 08:02:25 pm
content: Hello.I was gifted this nice function generator. While I have no practical need of it, I decided to restore it. While there is some wear and tear in switches and pots, and these can be easily fixed, there are also several issues with waveforms.Square always has about 90% or 10% of duty cycle, regardless how you adjust the pot (and pot is not defective, because it affects sine and sawtooth waves when rotated)Sawtooth is OK, but sine is messed - first halfwave looks ok, but 2nd part is chopped off. (See the picture).These issues persist on all frequencies and frequency ranges.I quickly visually checked all caps and they look ok. Also, there are voltage test points, +15V and -15V are spot on, however, voltage on +20V marked test point is about 25V.Any ideas what to try to check first?

author: Martin72
author_rank: Super Contributor
timestamp: July 10, 2025, 08:18:45 pm
content: Hi,Manual with circuit descriptions and schematics:https://www.casa.co.nz/equipment/instruments/Signal/119-Exact-Manual_78p.pdfWhats the channel coupling of your scope?

author: LinuxHata
author_rank: Frequent Contributor
timestamp: July 11, 2025, 04:18:36 am
content: I tried both DC and AC coupling, no noticeable difference.Thanks for the link, I've found it by myself, but thought it was only user manual, without circuitry. Will have better look now.
Advice needed about a multimeter behavior - Page 1
Forum section: electronics / testgear

author: jakal012001
author_rank: Newbie
timestamp: July 13, 2025, 05:08:47 pm
content: Hello every body,i've puchased multimeter model UT107+ about 65$, it is an improved version from ut107 automotive model with more featuresthe purpose of use is personal hoby and especially for testing and maintaining my carthe product is perfect over all, except one detail wich im asking about:the issue comes when i set up the multimeter to calculate rpm the meter is reversed between 2stroke and 4stroke, that is to say when i choose 4ST it give me reading for 2STthis is the problem i've foundobviously there was no answer from uni-t after i called their service supportis there a solution for that or maybe i can live with thatbtwn the reading is quite exact exept for indication between 2ST and 4STany advices will be welcomthank you.
Zoyi ZT-1000R - Anyone heard of this? - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: July 08, 2025, 08:51:06 pm
content: A new insulation tester / DMM from Zoyi. I can't even find it on their website.https://vi.aliexpress.com/item/1005009371767749.html

author: coromonadalix
author_rank: Super Contributor
timestamp: July 08, 2025, 09:52:31 pm
content: look like they want to copy Gossen m27I meters loll

author: TheDefpom
author_rank: Frequent Contributor
timestamp: July 09, 2025, 11:27:15 am
content: I just received one to review, so should have a video done for it and published in the next couple of weeks I expect.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: July 10, 2025, 05:39:40 pm
content: Quote from: coromonadalix on July 08, 2025, 09:52:31 pmAt merely 30$ copy away' with those high-voltages.Its does seem quite a bit more advanced than the usual run-of-the-budget-mill when it comes to insulation testers at this sub-50 price range, where it tends to be the likes of VC60B and variants of it that usually don't implement timing PI & DAR aspects, plus you also get a multimeter on top. (-A)I do like the use of 18650cells, as I believe the older box-variant used a shutload of AA cells.

author: BillyO
author_rank: Super Contributor
timestamp: July 10, 2025, 06:00:03 pm
content: Quote from: DaneLaw on July 10, 2025, 05:39:40 pmI think he said they were 14500 cells. Quite a bit smaller than the 18650, but still nice to have. The only issue I see is that you have to remove them to charge them.

author: DaneLaw
author_rank: Frequent Contributor
timestamp: July 10, 2025, 06:11:44 pm
content: Quote from: BillyO on July 10, 2025, 06:00:03 pmYour right Billy, it relies on 3x14500.. so cells around 14x500mm in dimension.. A Lithium-ion variant (3.7v) of the classic AA-sized 1.5v batteryA shame, as that standard isn't as common in Li-ion regi, or can hold anywhere around the same charge as fx 18650, and a cell standard that quite a few multimeters & clampmeters are using.14500 is usually sub 1000mAh not least no-name cells from China, where most 18650 these days are in the 2500 to 3000mAh range pr cell.

author: BillyO
author_rank: Super Contributor
timestamp: July 10, 2025, 06:19:52 pm
content: YEs, they are significantly lower capacity. They are not used nearly as much so lack the attention of the manufacturers for getting the latest improvements.But wait! There are these:https://vi.aliexpress.com/item/1005008685930134.htmlAnd, if you believe that I have a bridge you might be interested in, in NY city!
Rigol DHO804 - Data logging Measurments? - Page 1
Forum section: electronics / testgear

author: LiftedTrace
author_rank: Regular Contributor
timestamp: July 06, 2025, 04:06:22 pm
content: Hello,Does anyone know if its possible to log the measurements on this scope? Measurements like Frequency or Vrms, etc?I know you can dump memory to a csv file, but this seems to only have voltage values and a LOT of them what seems to be many points along the trace.I wanted to do a frequency sweep of an audio amplifier and log Vrms output through the sweep and calculate the dB through the range.Thanks.

author: Kean
author_rank: Unknown
timestamp: July 07, 2025, 11:40:53 am
content: I think you would need to use the SCPI command MEASure from a computer over USB/LAN.There are other topics here about writing SCPI scripts in Python or using other tools.I've not got this scope, but there is good info in section 3.17 of the programmers manual.Do a web search for "dho800 programming guide" or maybe use this link:https://www.batterfly.com/PDF/RIGOL/dho800/DHO800-Series_programmingguide_EN.pdfIt looks like the SCPI MEASure commands are very similar to other Rigol models like the MSO5000.

author: Fungus
author_rank: Super Contributor
timestamp: July 07, 2025, 02:14:13 pm
content: From the programming guide:

author: zelectronicauy
author_rank: Newbie
timestamp: July 08, 2025, 12:27:29 pm
content: Or you can use this program:https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/

author: LiftedTrace
author_rank: Regular Contributor
timestamp: July 09, 2025, 12:22:01 pm
content: Wow, thanks for the input.I had no idea you could do this sort of thing with these scopes.

author: RoGeorge
author_rank: Super Contributor
timestamp: July 09, 2025, 12:29:54 pm
content: Yes, it is possible to log, did once something like that, to log the Vavg of all 4 channels from a Rigol DS1054Z.https://www.eevblog.com/forum/testgear/python-scripts-to-control-instruments-using-lxi-scpi-no-drivers-required/msg1169193/#msg1169193It's very crude, but the Python sources are easy to adapt for logging other things the oscilloscope can measure (by changing the corresponding SCPI commands).

author: LiftedTrace
author_rank: Regular Contributor
timestamp: July 10, 2025, 06:15:19 pm
content: This is really cool.I tried to get the TestController to work, but I think I fall into the issues others had with USB3 not talking correctly with the scope in linux. I am currently waiting for the small wifi dongle to get this connected to my network so I can try again over IP.
Rigol DHO924S digital channel triggers lagging issue? - Page 1
Forum section: electronics / testgear

author: real_m
author_rank: Newbie
timestamp: July 10, 2025, 08:14:14 am
content: Hi everyone,I've recently started doing more work on embedded projects with custom circuits. I thought the DHO924S would be a good fit for my needs which are basically:- 2 analog channels- a good number of digital probesNow that I have the DHO924S here, I am trying to view the last 1-2 seconds of all connected channels in a rolling or periodically refreshing view, but that's not supported, it seems (only for a few milliseconds at once). Displaying digital channels periodically with triggers doesn't work in a responsive manner, it just seems to freeze, and often not trigger at allIs the DHO924S really that bad at displaying digital channels? I can't really imagine what the use case for these digital probes is if they neither trigger in a timely fashion (it just seems to hang) nor be viewed in a rolling view (or refreshing based on an interval)Ideally I would also like to be able to view the digital channels on my PC as well, but their PC software is horrible and they don't support macOS

author: Fungus
author_rank: Super Contributor
timestamp: July 10, 2025, 08:32:26 am
content: Quote from: real_m on July 10, 2025, 08:14:14 amPlease tell me you didn't download UltraSigma.Just connect to it using a web browser...http://192.168.0.xxx(or whatever IP address you set on the 'scope)
Using the Anritsu MG3700A for complex vector waveforms  - Page 1
Forum section: electronics / testgear

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: August 04, 2023, 06:13:27 pm
content: If you’re interested in creating complex vector signals with high bandwidth, then the Anritsu MG3700A might be what you are looking for. It’s an ARB device with hundreds of waveforms preloaded, and quite a lot of other functions as a standard, including BER analysis.When looking for an ARB-capable vector signal generator myself, I eventually decided against upgrading my SMIQ3 or AMU200A (which both can do so, but with hard-to-find options) but decided to buy an Anritsu MG3700AI picked up mine for less than €1000 at ebay and made a video about its use as a stand-alone instrument. It’s a quite exiting device, enjoying it quite a lot!In the future, I plan to explore its use together with a computer, allowing you to create many complex waveforms (QAM, FPSK, etc.), multitone signals, and upload your own created waveforms from Matlab, Python code or other software.https://youtu.be/wyKYlI6jtRALet me know what you think…- Rudi

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: October 08, 2023, 12:54:30 pm
content: Those using the Anritsu MG3700A, or those interested in a quite capable yet affordable Vector Network Generator, might be interested in the second episode of my review of that device. Here, I go into the use of computer software (IQproducer) for generating standards-compliant waveforms, generic waveforms (e.g., QPSK, AFK, or QAM16 up to QAM256), or importing your own waveform from MatLab, Python code, or whatever.The episode also demonstrates how to show an IQ constellation diagram on an R&S RTB2 scope (using an undocumented command) and how to overcome the missing clock out signal on the Anritsu. Enjoy!https://youtu.be/uXCm8BXbKnI

author: wkb
author_rank: Super Contributor
timestamp: July 08, 2025, 06:49:12 pm
content: I picked up one yesterday, it is an absolutely fascinating piece of kit. Learning curve is, hmmm, interesting. But that is part of the fun in the end.Wilko
Owon ADS800A 12 bit oscilloscope new video in Chinese - Page 1
Forum section: electronics / testgear

author: ptluis
author_rank: Frequent Contributor
timestamp: July 09, 2025, 04:12:34 pm
content: Panel and Menu interfaceIn Chinese language for those who understand ithttps://m.iqiyi.com/v_13zjsv62bjc.html

author: DaneLaw
author_rank: Frequent Contributor
timestamp: July 10, 2025, 05:50:23 pm
content: Why a brand new thread?Don't you already have one for ADS800A like 3 months back?https://www.eevblog.com/forum/testgear/owon-ads814a-12-bits-oscilloscope-rigol-dho800-competition

author: ptluis
author_rank: Frequent Contributor
timestamp: July 11, 2025, 01:37:44 am
content: Quote from: DaneLaw on July 10, 2025, 05:50:23 pmFor some unknown reason I'm not able to view my previous topic, always getting 404 error, even after clearing cache and refreshing webpage