hybridfree/eevblog-posts huggingface dataset:
PROSTER BM4070 Digital LCR Tester - Page 1
Forum section: electronics / testgear

author: jebem
author_rank: Regular Contributor
timestamp: June 15, 2025, 06:33:14 pm
content: I got this BM4070 some years ago. I believe it is still available on several web shops.This tester comes from an era when a linear potentiometer was needed to adjust for Zero (only for on Capacitor ranges).It needs now calibration on the higher capacitance ranges, as the readings are far off to be trusted.It uses trimmers for calibration. Just need to remove the back cover by undoing four screws.The daughterboard PCB has nine trimmers labeled as follows:VR1 200pFVR3 20-200uFVR4 2000uFVR5 200uHVR8 200uH-1VR6 2mHVR9 2mH-1VR2 20mH-200mHVR7 2-20HI am waiting to get my new ZT-DQ02 LCR tester to have another tester to compare readings.Meanwhile I opened it for inspection and took the opportunity to take pictures.There are two PCB's. The main board with reference BM4070 REV:2.0 220106 (2022-JAN-06), and the daughterboard is BM4070x REV:2.1 211210 (2021-DEC-10).Main board - Main components:IC1 BLOB MCU - 44-PIN ICIC2 14053BG 16-PIN MC14053B Triple SPDT Analog Multiplexers/DemultiplexersIC3 TL062G 8-pin TL062G Dual Low Power JFET OpAmpQ1 S8050 TO-92 S8050 NPN BJT 2W 1.5A 40VQ1 S8050 TO-92 S8050 NPN BJT 2W 1.5A 40VQ3 J6 SOT-23 SMD S9014 NPN BJT 0.2W 0.1A 50VQ4 2A SOT-23 SMD MMBT3906 PNP BJT 0.2W 0.2A 40VD3-D7 M7 1N4007 1A 1000V Si DIODED8-D12 M7 1N4007 1A 1000V Si DIODER27 PTC 1500RVR10 Zero Adj 1MR Linear PotDaughterboard - Main components:IC4 072C 8-PIN TL072 Dual Low Noise FET OpAmpIC5 072C 8-PIN TL072 Dual Low Noise FET OpAmpIC6 4093BF 14-PIN CD4093BF Quad 2-Input NAND Schmitt TriggerIC7 14066BG 14-PIN MC14066B Quad Analog Switch/Quad MultiplexerIC8 OPA1612 8-PIN OPA1612 Dual High Performance Bipolar Audio OpAmpThe BM4070 runs on a 9V dry battery and consumes around 10mA independently of the selected scale.A value too high for such a small battery imho.

author: jebem
author_rank: Regular Contributor
timestamp: June 15, 2025, 06:34:33 pm
content: Additional pictures:

author: Stray Electron
author_rank: Super Contributor
timestamp: October 05, 2025, 07:22:08 pm
content: Thanks for the review. I was just gifted one of these yesterday and I just tried it out this afternoon. It seems to work very well for $37 meter! But I was curious about what frequency they tested inductors and capacitors on. I looked in the meter's manual and it doesn't says anything about it so I looked up the specs on Proester's website and they claim that it test at "99.99Hz/999.9Hz/9.999KHz/99.99KHz/999.9KHz/5MHz". Do anyone know anything about that? My guess is that they must change frequency with each range on the meter.

author: Martin72
author_rank: Super Contributor
timestamp: October 05, 2025, 08:09:26 pm
content: Do you have an oscilloscope?Then you can measure it.QuoteThat will also be the case; for example, pF is difficult to measure at 100Hz, so the measurement frequency must be higher.
HSPY-1000 Power Supply defective - „CC Mode“ - Page 1
Forum section: electronics / testgear

author: mani9876
author_rank: Newbie
timestamp: October 05, 2025, 08:03:01 am
content: Hello!I am owning a HSPY-1000 since about 2 years, it suddenly stopped working - the problem is, as soon as I turn on the output, it goes into "CC" mode, reads about 4.2mA and there is no output at all.Does anyone ever face such a problem regarding the HSPY Power supplies and could tell me the issue?Thanks!
Ferrex ANS-24-146 (Aldi) - Page 1
Forum section: electronics / testgear

author: Aldo22
author_rank: Super Contributor
timestamp: September 08, 2025, 11:57:06 am
content: Today, I bought a DMM at Aldi while passing by.Ferrex ANS-24-146 for CHF 7.95 (8.50 €)It is my cheapest DMM so far, but also my only meter that has an ampere rangeanda GS certification.https://www.certipedia.com/certificates/50639471?locale=enIt comes with two test leads, 2 x AAA batteries, two 600V ceramic fuses, and a manual.It has a 3-year warranty.All of this somewhat contradicts the impression of quality. It all looks as cheap as it is.The accuracy is... well, it's 2000 counts.Initial tests show:DC and AC voltage measurements are acceptable.Current measurements are a little off, but within specifications. Resistance measurements too.The continuity tester is OK.Pros:It has auto rangeandmanual range selection.There is a “Rel” function.There is a “Hold” function.It has Min/Max and even Max-Min!There is a 1kHz square wave signal.It has A, mA, and uA ranges.The display is easy to read.It has a Cal switch inside, but I don't know how it works yet.The banana jack spacing is correct. ;-)Cons:No backlightmA on the volt jack.Poor quality impression.What to make of it?Useable, partially surprising. Certainly not a bad thing to have in the trunk.But despite the certificate and the 600V fuses, it does not inspire much confidence.

author: Kean
author_rank: Unknown
timestamp: September 08, 2025, 12:47:19 pm
content: Amazing that they spent money (even if just a few cents) on a switch for cal mode when a couple of test pads would surely have sufficed.

author: Aldo22
author_rank: Super Contributor
timestamp: September 08, 2025, 02:28:27 pm
content: Quote from: Kean on September 08, 2025, 12:47:19 pmThat's what I thought too. There are a few unusual decisions with this product.

author: Aldo22
author_rank: Super Contributor
timestamp: September 10, 2025, 12:41:52 pm
content: I bought two more to play around with and for spare parts.Today they were on sale. Now only 5.99 each.You probably can't even get the two 30mm 600V 10A and 250mA ceramic fuses for that price in retail stores.I messed up the voltage calibration on my first one because I didn't know the procedure.Maybe I can fix it later. There's a video on how to do it in the Eprom.

author: Aldo22
author_rank: Super Contributor
timestamp: October 02, 2025, 02:38:57 pm
content: After completely messing up my Ferrex with the “CAL” switch (I don't know the correct procedure), I tried to readjust it.I had never done this with a USB programmer before and thought that a cheap Ferrex would be an ideal practice object.And yes, it worked. I was able to correct V, Ω, μA, mA, and A.The accuracy now seems better to me than the factory setting, especially for current measurement.I think this cheap meter is now accurate enough for simple tasks.Attached images:IMSProg.png: The yellow markings are relevant. In reading direction: V, Ω, μA, mA, AVDC_VAC_Ohm.jpg: 1.234VDC, 1VAC, 1kΩuA_mA_A.jpg: 100μA, 1mA, 1.5A
Question about Atten ADS1202CML oscilloscope - Page 1
Forum section: electronics / testgear

author: bte
author_rank: Regular Contributor
timestamp: October 04, 2025, 11:40:46 pm
content: An Atten ADS1202CML oscilloscope is listed for sale at one of the local sites for about $200. The seller claims it's been used only once. I don't do design work so I don't really need an oscilloscope with all the analytics; I used the one I had (Rigol DS1054Z) a few times for debugging/investigation purposes and "seeing the wiggles" was enough nearly all the time. This one looks interesting because of its 200 MHz bandwidth and price/condition; if it gets broken, I won't feel so sad (for comparison, Rigol DS1054Z costs $550, DHO804 costs similar, and a Siglent SDS804HD costs $575, all from official importers, including 20% VAT). I also found in one forum post that ADS1202CML had dual time base that recent scopes don't have.However, this post is about some other details that I came across while trawling the forums. I came upon this spec sheet document (attached) and found two interesting details: A mention of 50 Ohm input and only 5K points/channel memory depth while its slower sibling sports 2M points total (see attached png). I know that Siglent is the OEM for these scopes yet I couldn't find a corresponding Siglent model at 200 MHz. The Siglent versions top at 150 MHz but they all sport 2M points memory depth, similar to the Atten counterparts.In short, does anyone know:1- if this scope really has 50 Ohm input? It is only mentioned in one table and nowhere else in the rest of the document.2- if this scope really has only 5K points/channel memory or does it come with 2M point total memory? If only 5K/channel, this brings up the question of whether this scope is really based on the Siglent CML series or something even older than that.Thanks in advance for any insight.

author: tautech
author_rank: Super Contributor
timestamp: October 04, 2025, 11:52:12 pm
content: These old models varied significantly in spec.Trust what the datasheet says.
Tektronix CSA803 distorted edge waveform - Page 1
Forum section: electronics / testgear

author: Xtremexp
author_rank: Regular Contributor
timestamp: October 01, 2025, 02:16:02 am
content: Hi all,I have tektronix CSA803 which does not give any errors on self test. I do have some sampling heads. When I use SD-26 sampling head and try to see the output of the calibrator, the rising edge of the signal looks so noisy. Has anyone face similar issue on these sampling scopes?I can confirm that the sampling head is working fine as I can see the edge OK in another CSA. The output of the calibrator and the internal clock looks OK too.Any sort of help or direction for debugging is appreciated

author: calibrationfixture
author_rank: Regular Contributor
timestamp: October 01, 2025, 05:40:30 am
content: Hi Xtremexp,Never saw this. Reinserting the SD-26, other Slot, other Channel, Initialize. All done?Calibrationfixture

author: KrudyZ
author_rank: Frequent Contributor
timestamp: October 02, 2025, 03:37:21 am
content: I believe that scope used a random delay from trigger to sample and then reconstructs the full waveform.This looks like something was messed up in the reconstruction process...
Looking for LeCroy AP020 Manual - Page 1
Forum section: electronics / testgear

author: RCHRDM
author_rank: Regular Contributor
timestamp: December 08, 2018, 06:20:20 am
content: Does anyone have an electronic copy of the manual for the LeCroy AP020 Active Probe?Richard

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 08, 2018, 06:49:20 am
content: do you need one?http://www.testequipmenthq.com/datasheets/LECROY-AP020-Datasheet.pdf

author: RCHRDM
author_rank: Regular Contributor
timestamp: December 08, 2018, 04:24:29 pm
content: Thanks. That seems to be a data sheet. I just wondered if there was a manual too.Richard

author: atr1_cornell
author_rank: Newbie
timestamp: October 01, 2025, 06:15:18 pm
content: I know, ancient thread, but I also needed a manual so I spent some time digging. I did not find a real manual, but there is more detailed spec info as part of the LeCroy 9320 scope manual.Specifically, the voltage range is clarified a bit: +/-5V dynamic range, +/-20V offset range, 1.5m cable, <350ps tRise, and +/-40V non-destruct limits.See:https://archive.org/embed/LeCroy_9320section 2 Specifications, pages 2-9 through 2-10.
cheap oscilloscope comparison - Page 1
Forum section: electronics / testgear

author: htrv
author_rank: Newbie
timestamp: October 01, 2025, 02:20:50 pm
content: Hey guysIm looking for cheap upto 200$ oscilloscope mainly for analog circuits, DCDC converters and some slow communications upto 10MBPSi found those 2 oscilloscope with alot of reviews from the community but couldnt make sense if their triggers, accuracy and noise are any good?zeeweii DSO3D12 about 75$ 2CH 120Mhz BWFNIRSI 1013D - 105$ with larger screen also 2CH 100Mhz BW

author: tunk
author_rank: Super Contributor
timestamp: October 01, 2025, 02:29:29 pm
content: There's a long thread about the 1013D, and I thinkthe general advice is to stay away (in reality thebandwidth is 20-30MHz).Edit: There's also a list of inexpensive scopes here(not fully updated though). You could also take alook at Owon HDS200 and Zoyi/Zotek ZT-703S.https://www.eevblog.com/forum/testgear/portable-oscilloscopes-list
MICSIG VATO2004 - Page 1
Forum section: electronics / testgear

author: htrv
author_rank: Newbie
timestamp: September 28, 2025, 02:42:35 pm
content: HeyI stumbled across this oscilloscope MICSIG VATO2004 here:https://he.aliexpress.com/item/1005008887912384.html?spm=a2g0o.productlist.main.2.23a297dc9YfnDH&algo_pvid=00d90df1-6e14-43a5-a91c-19e71791a7b0&algo_exp_id=00d90df1-6e14-43a5-a91c-19e71791a7b0-1&pdp_ext_f=%7B%22order%22%3A%2215%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&pdp_npi=6%40dis%21ILS%211589.41%21794.70%21%21%213311.28%211655.64%21%40210156fc17590408708028340e055c%2112000047087228173%21sea%21IL%210%21ABX%211%210%21n_tag%3A-29910%3Bd%3Ae3e2e060%3Bm03_new_user%3A-29895&curPageLogUid=0fQ9buPRyr9K&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005008887912384%7C_p_origin_prod%3A#nav-specificationThe price sound too good to be true for this specification (200MHZ@1GS/s, 4CH, 50Mpts)Any one had any experiance with it?Im mainly measuring audio amps / computers / DCDC converters etc

author: thm_w
author_rank: Super Contributor
timestamp: September 30, 2025, 01:08:33 am
content: Fixed link:https://www.aliexpress.com/item/1005008887912384.htmlSeller has 75% rating, basically a scammer, you may or may not get the item you order.Real price for VATO2004 is about $500https://www.saelig.com/micsig-vato/vato2004.htmFor that price you can get a benchtop scope with a screen.

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: October 01, 2025, 04:00:12 pm
content: #1 the Micsig VTO2004 is the cheaper version with nearly the same specs. VATO is the "automotive" version#2 even the VTO2004 only support CAN (original, not CAN-FD) and LIN as protocol decoders (and triggers). Obviously no other decoders or protocol triggers exist for these two scopes.#3 the supported trigger types are rather basicGiven that the VTO1004 costs ~392€ here while a MHO14-200N (12bit, 200MHz, 110MPts, 8" 1280x800 touchscreen) costs ~725€ (or ~548€ on Banggood), the VTO1004 looks pretty much underwhelming even considering the lower price.
NORMA D5235 - Page 1
Forum section: electronics / testgear

author: wurstwerner
author_rank: Newbie
timestamp: November 23, 2016, 08:30:48 pm
content: Hey there!I recently got myself a NORMA Power Analyzer D5235. Problem is I'm lacking the manual and external shunt.So the question is: Can you guys help me out with either or both of:- Manual?- Specification of the Connector used for the external shunts?Thats how it looks likehttp://www.wotol.com/1-lem-norma-d5235-ac-dc-power-analyzer/second-hand-machinery/prod_id/404170RegardsPaul

author: michal82
author_rank: Contributor
timestamp: January 26, 2018, 01:57:13 pm
content: HeyHave you found the manual?You can use a shunt or hall sensor for this meter.The seller informed me that a hall sensor should be used for DC measurement. I would like to verify it.RegardsMichal

author: Kjelt
author_rank: Super Contributor
timestamp: September 09, 2019, 02:23:33 pm
content: Quote from: wurstwerner on November 23, 2016, 08:30:48 pmAre you still interested in this ? Might be able to help.

author: IkBinInBlokjeOm
author_rank: Newbie
timestamp: February 19, 2025, 08:32:01 pm
content: Hi Kjelt, I ran into this post while looking for a manual for the Norma D5235 Power Analyzer. Are you still able to help? Although it's an old post; I thought to give it a try.

author: Kjelt
author_rank: Super Contributor
timestamp: February 19, 2025, 11:17:38 pm
content: Oh man I have no idea where I left this, if it is still thereMy shack was hit by a roof leakage three years ago and it took more than a month before I found out and had to safe as much as quick as I could. So a lot has been trashed and it is still an unsorted mess.If I ever come across it I will contact you but don't get your hopes up.

author: C_K_E
author_rank: Newbie
timestamp: October 01, 2025, 07:40:41 am
content: HelloI have seen this post in search for the shunt connector of the lem norma d5235, i still am searching for the connector itself but for all other people searching i have the manual for it.

author: Kjelt
author_rank: Super Contributor
timestamp: October 01, 2025, 02:03:53 pm
content: Quote from: C_K_E on October 01, 2025, 07:40:41 amWish I could help you, only thing I can tell you is what is on my two connectors: "SWISS MADE" FISCHER 104 where the '1' is barely readable.And the symbol a large f with two W's inside.
HP3478A power supply pre-regulator voltages and replacement front bezel - Page 1
Forum section: electronics / testgear

author: hartvige
author_rank: Newbie
timestamp: October 01, 2025, 10:59:08 am
content: I'm fixing up a 3478a which had PSU problems. It works now, but one thing I stumbled over is that the voltages on the big caps (before the four regulators) seem excessively high, even with the instrument configured for 240V and being fed 230V. For the two 5V supplies, the cap voltage (with ripple) never goes below 12.5V. And the +/-15V caps similarly never go below 28V. Nothing wrong per se, but causes unnecessary power consumption and heating of the regulators. It would be great if someone could do a quick measurement and see if they observe the same.And unfortunately, the front bezel is broken - so if anyone has a dead parts unit with an intact bezel in good shape and would be willing to sell it, I would be interested

author: pqass
author_rank: Super Contributor
timestamp: October 01, 2025, 01:58:08 pm
content: I've also observed the same.AC line in = 118VACAcross C703 (330uF 50V) = 28.7VDCAcross C711 (1000uF 25V) = 13.3VDCAcross C702 (330uF 50V) = 29.1VDCAcross C761 (3000uF) = 12.9VDCTemperature of U703 +15V regulator (7815) = 44°CTemperature of U701 +5V regulator (LM340) = 40°CTemperature of U702 -15V regulator (7915) = 44°CTemperature of U760 +5V regulator (LM340) = 39°CAll the regulators have a maximum input voltage of 35V.I can still hold on to the heatsinks so I don't think the regulators are stressed.HP 3478A service manualhere.7815 datasheethere.7915 datasheethere.LM340LAZ datasheethere.
Any documentation or schematics for the METRIX Micro-MX 580 (Bench)Multimeter? - Page 1
Forum section: electronics / testgear

author: kblue
author_rank: Regular Contributor
timestamp: June 18, 2025, 12:05:01 am
content: Hello there!Trying to repair this thing. All 3 batteries are dead, all cal is lost and the only function that works is ... well ... cal-mode. Which wouldn't be a problem, but i have no clue about the menus, the steps and so on. I've already found a small PDF online but it's missing a lot of information due to missing pages (especially the cal-part). The cal-part has something to do with memory-adresses, values and so on. Without documents it's a bit of a mystery what the unit actually wantsSo yeah ... does someone has the full PDF? I've already asked Chauvin-Arnoux (the company behind Metrix) but no response for weeks.Best wishes!

author: Poroit
author_rank: Frequent Contributor
timestamp: June 18, 2025, 05:11:16 am
content: I remember contacting Chauvin Arnoux previously.Slow to respond !Keep sending them "ANY NEWS"

author: kblue
author_rank: Regular Contributor
timestamp: September 30, 2025, 05:24:21 pm
content: I asked them again ... and again, no luck so far. What a bummer, the unit wants to work but measured input is ... well ... not quite right like 1,9 V input schows 1,8XXX or 100 Ohms shows as 104 Ohms and so on.
Siglent SDS1052DL firmware - Page 1
Forum section: electronics / testgear

author: Khaveer
author_rank: Contributor
timestamp: March 18, 2021, 09:26:20 am
content: Hello. I've been recently trying to find the most recent firmware for my Siglent SDS1052DL scope. Unfortunately it seems that it's gone from the downloads list. There's only firmware for the newer plus models. Is there any other place I could download it?By the way, did anyone ever try to figure out if this scope is hackable?

author: Tjuurko
author_rank: Regular Contributor
timestamp: March 18, 2021, 09:38:14 am
content: https://int.siglent.com/upload_file/zip/firmware/Oscilloscope/https://int.siglent.com/upload_file/zip/firmware/Oscilloscope/SDS1000DL_V6.02.01.07.ziphttps://int.siglent.com/upload_file/zip/firmware/Oscilloscope/SDS1000DL_V100R006B02D01P08_FPGA_V3.1.zip

author: tv84
author_rank: Super Contributor
timestamp: March 18, 2021, 09:52:57 am
content: Tjuurko, those FW are for DL+ version, not DL.I think the latest DL is the one attached.Maybe it's hackable as the CML (see the forum) although I never tried to patch it. The goal would be the 200 MHz BW?

author: TinnyTime
author_rank: Newbie
timestamp: September 30, 2025, 03:15:28 pm
content: I just got the latest firmware from siglent, I thought I'd post here for others in the future.Comment from Siglent support team:"Version 5.06.02.21 was the final firmware release (in 2015) for SDS1000DL series and there will be no further updates. I attached a copy of the version 5.06.02.21 ADS file to this email for you to use if you would like. We no longer have any release notes describing this revision. This firmware is not compatible with the current model SDS1052DL+ (Plus version), so please confirm that your oscilloscope is model SDS1052DL before upgrading."
Hantek 6022BE V/div and sigrok-cli - Page 1
Forum section: electronics / testgear

author: Jex
author_rank: Newbie
timestamp: September 30, 2025, 10:17:06 am
content: The problem is that I can't set any scaling V/div value using sigrok-cli?Is it that the device just doesn't support this from the command line? As I understand it, the setting should be done with numbers 0-5. e.g. --config num_vdiv=3but this doesn't work.this table is not necessarily correct0 5 V --config num_vdiv=01 2 V --config num_vdiv=12 1 V --config num_vdiv=23 500 mV (0.5 V) --config num_vdiv=34 200 mV (0.2 V) --config num_vdiv=45 100 mV (0.1 V) --config num_vdiv=5sigrok-cli --driver hantek-6xxx --showDriver functions:OscilloscopeScan options:connhantek-6xxx:conn=1.3 - Hantek 6022BE with 2 channels: CH1 CH2Channel groups:CH1: channel CH1CH2: channel CH2Supported configuration options across all channel groups:conn: 1.3 (current)limit_samples: 0 (current)limit_time: 0 (current)samplerate - supported samplerates:48 MHz30 MHz24 MHz16 MHz8 MHz (current)4 MHz1 MHz500 kHz200 kHz100 kHznum_vdiv
Using Yaorea Battery Resistance Fixture for SMD Low Z Kelvin type measurement - Page 1
Forum section: electronics / testgear

author: mawyatt
author_rank: Super Contributor
timestamp: September 29, 2025, 06:13:16 pm
content: While posting on another thread about low Z LCR Tweezer measurements we decided to try this Yaorea Battery Resistance Fixture for larger SMD Low Z devices again from awhile back.https://www.eevblog.com/forum/testgear/any-more-in-depth-info-on-the-yr1035-battery-tester-milliohm-meter/msg5784723/#msg5784723This fixture has coaxial terminals for the High and Low Force/Sense leads which allow the larger SMD components to be positioned between the plungers as shown. Tedious yes, but with a little patience one can position the DUT as shown (make sure to clean the terminals and DUT ends for low Z measurements, we use IPA).The fixture has open exposed cable leads and thus not too good for AC measurements with an LCR meter, but OK for use with DMM as shown with an adapter to take the cable connector to the typical 4 banana jacks. For LCR use one would wants to replace the cable with proper shielded BNC cables. We may modify this fixture or order another (they are cheap) for LCR meter use.The coaxial connections are made by pins, also used in some Kelvin Type probes resembling DMM meter probes, and interesting as this begs for a custom based 3D printed fixture utilizing the coaxial pins, could be a very interesting project possibly yielding a really good low Z LCR/DMM Meter fixtureShown is a Zero Ω Calibration with a Cu plate and a 1.00mΩ 1/2% 2512 SMD resistor measured with an adapter for the cable connector and a DMM6500 on the 1Ω range. Seems to work OK, but a little tedious.Anyway, fun stuff getting this cheap battery fixture to behave this way and curious if anyone else has tried this or similar, if so please report findings.Should add works well with the intended YR1035+ meterBest
Difa PDF3700 Programmable Dual Filter information - Page 1
Forum section: electronics / testgear

author: Ancato
author_rank: Newbie
timestamp: October 02, 2025, 09:08:36 am
content: I am looking for technical information / documentation (datasheet, user manual, service manual) for an older unit: Difa PDF3700 / PDF 3700 Programmable Dual Filter.I think the unit is from around 1980.The two filters seems adustable between 0.1 Hz - 102 kHz.
Zoyi ZT703S firmware issue  - Page 1
Forum section: electronics / testgear

author: FantaBH
author_rank: Newbie
timestamp: September 27, 2025, 12:29:09 pm
content: Hello to all. I am also maybe known as BA electronic at YouTube. When I made review of zt703s it was with v142 firmware. For me instrument was doing all I need with no problems. Recently I decided to upgrade unit with latest v157 firmware which is at my opinion terrible. XY does not work properly , Oscilloscope function is ruined badly. Simple 1Mhz sine weave signal is jittering a lot over screen. Higher in middle of the screen then at edges. Even started to think that something is wrong with my JDS6600 signal gen. But after confirmed good same signal with two other oscilloscopes, now I know it is problem with latest 157 firmware since it was working properly and very nicely with 142 firmware.My questions are:Does anyone have 142 firmware file ?Is anyone else tried downgrading this zt703s ?Is it safe to do it?I mean I do not want to ruin device fully as I need it and I am quite pure to afford buying new one. Thank you .

author: Salient666
author_rank: Newbie
timestamp: September 28, 2025, 07:18:40 pm
content: Here you go.

author: FantaBH
author_rank: Newbie
timestamp: September 28, 2025, 09:26:48 pm
content: thank you , now question how safe is to perform downgrade, anyone did it ?

author: csuhi17
author_rank: Frequent Contributor
timestamp: September 29, 2025, 02:57:12 am
content: As much as the update.

author: Phb
author_rank: Contributor
timestamp: September 29, 2025, 03:54:39 am
content: Quote from: FantaBH on September 28, 2025, 09:26:48 pmhttps://www.eevblog.com/forum/testgear/new-zoyi-multimeteroscilloscopes-zt-70xs-up-to-50mhz250msps-(nov-2022)/msg5430815/#msg5430815This post seems to show that it can be done. And so does this one....https://www.eevblog.com/forum/testgear/new-zoyi-multimeteroscilloscopes-zt-70xs-up-to-50mhz250msps-(nov-2022)/msg5678903/#msg5678903I would also recommend the above chat discussion with hope that it is worth your time reading...

author: FantaBH
author_rank: Newbie
timestamp: September 29, 2025, 04:59:18 pm
content: Thank you all
New Siglent SDG3000X Arb. Waveform Generator - Page 1
Forum section: electronics / testgear

author: CsK
author_rank: Newbie
timestamp: March 05, 2025, 11:07:24 pm
content: HelloJust noticed a new SDG3000X series 80/160/200MHz Arbitrary Function Geenerator. (at this moment only shows on Chinese website)Besides the usual functions it can generate IQ signals as well, nice!It looks to be a nice gear.Attached the translated datasheet.Cheers!

author: tautech
author_rank: Super Contributor
timestamp: March 05, 2025, 11:13:56 pm
content: Quote from: CsK on March 05, 2025, 11:07:24 pmYup, spotted already:https://www.eevblog.com/forum/testgear/new-siglent-awg-sdg3000x/

author: Grandchuck
author_rank: Super Contributor
timestamp: July 31, 2025, 02:12:57 pm
content: I contacted SiglentNA and learned they are expected fourth quarter for USA market. Hmmm maybe a surprise Xmas gift from me to meNo price yet.

author: famalex
author_rank: Regular Contributor
timestamp: September 26, 2025, 08:30:13 pm
content: https://www.batronix.com/shop/waveform-generator/Siglent-SDG3082X.html

author: black6host
author_rank: Contributor
timestamp: September 26, 2025, 09:30:36 pm
content: I'm not liking the new form factor. Stacking gear is the only way I can fit stuff in my lab and this form factor doesn't lend itself well to that.

author: tautech
author_rank: Super Contributor
timestamp: September 26, 2025, 10:45:17 pm
content: Merge request to mods filed for content here to be merged into:https://www.eevblog.com/forum/testgear/new-siglent-awg-sdg3000x/
Giga-tronics 12000A series microwave synthesizer - Page 1
Forum section: electronics / testgear

author: thememo
author_rank: Newbie
timestamp: September 06, 2019, 11:58:18 am
content: I will buy used signal generator in my country, i found 3 generators that gigatronics, keysight and rigol. I know keysight and rigol, also i examine them in several sources. However, i did't find any information and user experience about gigatronics 12000A series microwave synthesizer in this forum, youtube and other web-sites. Can anybody have an experience on this device ? if it is , it will be nice to hear

author: thememo
author_rank: Newbie
timestamp: September 07, 2019, 05:20:07 am
content: Any reccomendation ?

author: DaJMasta
author_rank: Super Contributor
timestamp: September 07, 2019, 03:42:14 pm
content: I've got a later version but considered the 12000 series, a few things:They're very capable for the price especially for high frequency output.There is little to know service information available (just datasheet and manual) and Gigatronics seems to remove all mentions of previous models from their website.It's also very difficult to find software for them, though user manuals do contain a GPIB command reference.At least with my series, frequency sweep and mechanical attenuators are optional - so you may end up with an instrument you can't automatically sweep with to make frequency response plots with a SA's max hold mode and that can't output below -20dBm or so, which are often standard features of other RF sig gens.If you're looking for high bandwidth alternatives, sometimes Anritsu synthesizers come up with some bandwidth, and while they command a price premium, Rohde & Schwarz makes some very good ones as well.

author: romal76
author_rank: Contributor
timestamp: September 27, 2025, 04:40:06 pm
content: Hi All!Does anybody have Giga-tronics 12000 Cal Software (P/N 32464) from Chapter 3 of service manual?

author: Aiy
author_rank: Regular Contributor
timestamp: September 28, 2025, 04:07:10 pm
content: Hi,Attached is the 12000A series software and calibration data from my unit in case you want to compare.Best regards,

author: romal76
author_rank: Contributor
timestamp: September 28, 2025, 05:10:31 pm
content: Hi AiyThanks a lot!
8594E Input Issue - Page 1
Forum section: electronics / testgear

author: TylerPeppy
author_rank: Newbie
timestamp: September 26, 2025, 02:14:11 am
content: Hopefully someone has run into this issue before...I just bought an HP 8594E spectrum analyzer from EBay, but when I recieved it, I noticed a particular issue with the measured power flatness. Using my HackRF on generator mode, I swept from 9kHz to 2.9GHz but noticed the output power was measured as ~-42dBm up until 2.169GHz. Exactly at 2.170GHz, the peak will jump to -32dBm and remain there until the 2.9GHz.I did a CAL AMPTD and CAL FREQ with the CAL OUT on the front, but it still is having the same issue. Has anyone encountered this issue before? I can't seem to find much that would cause the amplitude to jump.For the sake of testing, I tested the HackRF output at 2.169GHz on my Keysight U2000H and got ~-42dBm, and around -41dBm at 2.170GHz up to 2.9GHz.
Vision Engineering Lynx Microscope alignment - Page 1
Forum section: electronics / testgear

author: FlexibleMammoth
author_rank: Regular Contributor
timestamp: September 21, 2025, 04:18:51 pm
content: Hi allI moved the topic here from the assembly category since this seems more fitting.I have a Vision Engineering Lynx Microscope that seems misaligned. When I place the word "ENGINEERING" below it, one eye reads "ENG" and the other "GIN". there seems some slight misalignment in height, too.The Zoom unit has an odd problem where after a few days without use, the zoom range will seize up and need considerable force to be turned for the range beyond 20x. Once you do that, it is completely free until it seizes up again. Heard this is a common problem on older Lynx units, not sure if the two problems are related.I messed with the screws in the head that I could reach, none have a visible impact on the image. I also removed one lens from the zoom unit, but did not really see anything that could be adjusted.Does anyone have an idea for where to start?Thanks,Andreas

author: kmoonwalker
author_rank: Frequent Contributor
timestamp: September 22, 2025, 09:13:04 am
content: Hi,I think you should consider contacting area service representative or the manufacturer.Aligning (collimating) is usually not easy on some brands but if you have some mechanical issue inside the zoom system it maybe that your problem is more complex.Usually the problem with it requiring large force to get it moving first time happens due to improper grease/excesive grease amount inside which gets you a similar outcome like for improperly greased CD player tray that works well but after few days with improper grease it gets "stuck" then after forcing the movement it will work and after some time not used it comes back to stuck state.But it maybe also a combination of that and some mechanical fault or some particles inside inside that are causing the parts to move with excessive force and using it like that may cause some excessive internal wear or additional damage to it. Hard to say what precisely in this particular brand but most of optical systems is one of three kinds with some modifications (for example Greenough) but it is really hard to say without exact model.Best to contact the manufacturer even for service advice or service manual if it is an older model.

author: FlexibleMammoth
author_rank: Regular Contributor
timestamp: September 25, 2025, 06:22:44 pm
content: Hi,The Vision Enginneering Lynx (not the new Lynx EVO) is an ocular-less stereo microscope, which gives a bit of 3D view (see the photo below). Really nice if it works. Unfortunately, it is poorly documented in terms of service.I contacted the manufacturer and they said the alignment needs precision equipment and it needs to be sent inWe will see what their cost estimate is, but I assume that puts it in the "expensive paperweight" section.Best regards,Andreas
A Hickok Semiconductor Curve Tracer - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: September 21, 2025, 03:03:10 pm
content: Model 440. Could not resist. Couple ECs, repair broken wire and replace fuse; all good to go. Smaller and brighter traces than my HK. The manual includes many applications I would not have thought of. The InstaBeta is a nice touch. Will see how they did it and modify a HK.I did not pay attention to where I got the manual from, sadly. If there is interest, I will upload it to my google drive.Dewey

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: September 21, 2025, 03:24:14 pm
content: Where did you find it, EBay?Did you have photos of the interior guts that you could share?

author: watchmaker
author_rank: Unknown
timestamp: September 21, 2025, 03:58:31 pm
content: I already opened it and did the repairs; I dropped my phone and borked the camera. New one is transferring now. 20 screws plus knobs.I will post some pics of the display though.See if the PDF will upload w/o the photos.

author: UnijunctionTransistor
author_rank: Frequent Contributor
timestamp: September 21, 2025, 04:30:53 pm
content: The manual fully satisfied my curiosity, thanks!Weirdly, the CMOS NAND gates are powered with-15 volts.Please do post the photos of typical curves when available.

author: watchmaker
author_rank: Unknown
timestamp: September 25, 2025, 05:05:56 pm
content: Quote from: UnijunctionTransistor on September 21, 2025, 04:30:53 pmThe InstaBeta changeover is more than I want to do to the Heathkit. But Hickok produces clean traces on the Siglent comparable to Heathkit. The only complaint is the wide steps for H divsions 1v/5v/10v.Because I consider this a "collector's" item, I am not changing the outputs to the scope. I have no idea what I am going to do with it, it IS about 1/2 the size of the Heathkit. The only changes I made are the 2 electrolytics and installing an inline fuse holder in palce of the pigtailed fuse.
Defective channel of the power supply Rohde & Schwarz / Hameg HMP 4040 - Page 1
Forum section: electronics / testgear

author: Dagobert1
author_rank: Contributor
timestamp: September 27, 2025, 10:09:43 am
content: I bought a cheap HMP4040 on eBay with a defective channel 2. The error was exactly the same as in the report here:https://community.element14.com/members-area/personalblogs/b/gough-lui-s-blog/posts/roadtest-extra-rohde-schwarz-hmp4040-04-teardown-attempted-repairI'll spare you any further description of the error here; everything is as described in the link above.The defective components were exactly the same, but the person (Gough Lui) who wrote the report couldn't find the error. I searched for the error for many months. Since the components on the board were difficult to desolder due to their high thermal mass, I first replaced the apparently defective parts and, just to be on the safe side, I also replaced all the capacitors. After switching it on, all the components were immediately defective again. I bought a thermal imaging camera and supplied power from the defective channel with a different power supply after the rectifier. My power supply can deliver a maximum of 32 V/6 A. Due to the short circuit in the defective channel, the voltage was limited to < 1 V at 6 A. I couldn't detect any heat generation in the channel using the thermal imaging camera. After an extended period of power supply, however, slight heating became apparent in the area of ​​the heat sinks around the two components (left 75339P, right BYV32E) in the TO-220 housing. Could it be a defective thermal pad? All power transistors and the rectifier are mounted on a heat sink and separated by a thermal pad. After removing the heat sink, I was able to examine the thermal pad. The thermal pad of the BYV32E power diode in the TO-220 housing below(!) the circuit board was indeed damaged on the picture in the red rectangle. When assembled, it was not possible to see that the thermal pad was damaged. After replacing the defective components and fuses and taping over the defective area of ​​the thermal pad below the circuit board with polyimide film, the nervously was high before the power supply was switched on for the first time. To my delight, the defective channel on the power supply now works perfectly. Then I tested the channel for several hours with a load resistor at full power without any problems. I don't think the cooling of the components is affected, as the damaged area is underneath the board near the BYV32E solder joint. I hope this repair report helps others. It's highly recommended to use a good desoldering station during the repair.
New 4" handheld 2ch touch DSO, BSIDE O2, 50MHz/250MSps (November 2024) - Page 1
Forum section: electronics / testgear

author: tunk
author_rank: Super Contributor
timestamp: November 09, 2024, 05:08:34 pm
content: Yawn, yet another (hopefully a bit better than the Fnirsi 2C53P):- 50MHz, 250MSa/s- storage depth： Up to 128kByte- time base range： 10ns - 20s/div.- vertical sensitivity： 10mv - 20v/div.- basic signal generator- 4" screen, portrait, 480*272 pixels- size 170x81x24mm- weight 268g- from around $60:https://vi.aliexpress.com/item/1005007964104548.html

author: tim_
author_rank: Regular Contributor
timestamp: September 24, 2025, 10:43:49 am
content: Has anyone tried this? The touch screen control sounds interesting.I got the Owon, but not having any dials or touch is quite limiting.
Looking for ESI 1063B manual. - Page 1
Forum section: electronics / testgear

author: NANOJOLTS
author_rank: Contributor
timestamp: September 24, 2025, 05:31:13 pm
content: Looking for ESI 1063B manual.Hi all, anyone have a manual for ESI 1063B VOLT-OHM BOX?I can think of a few ways to use them. I have (3) of these.But the manual would be super nice. PicsThanks Nano
Hameg HM 1007 interface HO 79 use? - Page 1
Forum section: electronics / testgear

author: tedsorvino
author_rank: Regular Contributor
timestamp: September 23, 2025, 04:06:19 am
content: Hi everyone.I ‘ve recently acquired a good old “hybrid” oscilloscope Hameg HM 1007. All good with it.Recently I saw that there is that interface accessory. After a bit of online research I realised that the appropriate series is HO 79 and there are 6 models. 2-3-4-5-6 and 7.Apparently HM 1007 works with the 3 of those 3-4 and 5. Am I correct?There is also a diy arduino option. The GitHub is online at least.Since I’m clueless of what I could achieve other than printing (I don’t need - I can take a picture of the “largeish” screen) I would like to know:a) if there is anything to gain from an interface. They can be found pretty cheaply from time to time. And the arduino one is very cheap.Do they give any data readings on the computer screen like a digital scope (p-p voltage, frequency hz etc)?b) what the appropriate models of HO 79 for the HM 1007 are and what are their differences?c) What computer software and hardware do they need (I guess I have to enter a bit in a pc time machine ). I guess arduino may take the lead on that field?Thanks in advance for your time

author: egonotto
author_rank: Super Contributor
timestamp: September 23, 2025, 06:19:05 am
content: Hello,there is an old (2019-2020) thread in German called “Hameg 1007 with HO79-4 interface PC software – where to get it?”But it could still be helpful.Hameg 1007 mit HO79-4 Interface PC-Software woher?https://www.mikrocontroller.net/topic/484173Best regardsegonotto

author: tedsorvino
author_rank: Regular Contributor
timestamp: September 23, 2025, 08:34:57 am
content: Thanks for that,Any idea regarding my other questions?After carefully reading the link provide there is a sub link in deutsch that helped with most of my questions.https://www.sky-messtechnik.de/images/PDFs/HO79.pdf
Does anyone have the files for visual studio express 2015? - Page 1
Forum section: electronics / testgear

author: SCSKITS
author_rank: Regular Contributor
timestamp: September 22, 2025, 04:20:51 pm
content: Does anyone have the files for visual studio express 2015? I have it installed on my current system but misplaced the files I downloaded. It was originally available as a install, where you could install from the Microsoft site or as a CD like image that you could put onto disk or USB stick and load on multiple PCs. I am looking for the latter.Thanksed

author: coromonadalix
author_rank: Super Contributor
timestamp: September 22, 2025, 05:01:25 pm
content: you can find 2015 RTM entreprise, community and express iso's with some searchthe only 2015 express i found is on ''archive'' iso of 677mb seems to be japan or not ?https://archive.org/details/ja_visual_studio_express_2015_for_windows_10_x86_dvd_dce55198you have on archive the 2015 community iso 7.2 gb toohttps://archive.org/details/vs2015.3.com_enu_202102and you can find the WEB online installers .... good luck my google fuu did not gave me good results and lots of duds

author: mahi
author_rank: Regular Contributor
timestamp: September 23, 2025, 07:34:50 am
content: There were several versions of Visual Studio Express 2015, so you must make sure to get the right version:For DesktopFor WebFor Windows (only for Windows UWP apps)But it seems Microsoft removed all Visual Studio Express 2015 downloads, even for MSDN Enterprise subscribers. Kinda weird because the downloads for older Visual Studio Express 2012 and 2013 versions are still available.Is there a particular reason why you can't use Visual Studio 2015 Community (or a newer Community version)?
Rotek Model 8000 - Programming Manual - Page 1
Forum section: electronics / testgear

author: MrPig
author_rank: Newbie
timestamp: September 23, 2025, 03:48:55 am
content: I wasn't able to find the original command list for this AC source ANYWHERE. I eventually got some old LabView VI's and pulled the commands from there. Posting to help other lost folk.Maybe someone on here has the original programming manual / command list?CommandSyntax / ExampleDescriptionOutput StateOUTP?Query output ON/OFF stateOutput StateOUTP ON / OUTP OFFTurn outputs ON or OFFCurrentCURR1 1.23Set current on channel 1 to 1.23 ACurrentCURR1?Query current setting for channel 1Current PhaseCURR1:PHAS 1.0Set phase offset for current channel 1Current PhaseCURR1:PHAS?Query current phase settingVoltageVOLT1 120Set voltage on channel 1 to 120 VVoltageVOLT1?Query voltage setting for channel 1Voltage PhaseVOLT1:PHAS 0.0Set phase angle for voltage channel 1Voltage PhaseVOLT1:PHAS?Query voltage phase settingFrequencyFREQ 60Set system frequency to 60 HzFrequencyFREQ?Query system frequencyOutput TerminalsROUT1:TERM FRONTRoute channel 1 output to FRONT terminalsOutput TerminalsROUT1:TERM REARRoute channel 1 output to REAR terminalsOutput TerminalsROUT1:TERM?Query active terminal set for channel 1
Clarostat 240-C with very strange internals... - Page 1
Forum section: electronics / testgear

author: HalFoster
author_rank: Frequent Contributor
timestamp: September 23, 2025, 11:21:40 pm
content: It's something new every day...I have a bad habit of collecting Clarostat 240-x Power Resistance Decade boxes and had another one come in tonight - but it is different than any other I have ever seen. **All** of them have large wirewound resistors making up the decades, but not this one. When I unboxed it I could tell it was very light and I thought someone had removed the resistance banks - no problem, I thought, it's a NaD just send it back... then I started looking closer and saw that there was, indeed, something wired inside - I still was thinking something homebrew. I opened it up and... durn if it doesn't look like something factory made, just in no way capable of meeting the power and performance requirements of a 240-C. Surely this can't be something from Clarostat, could it? Has anyone seen something like this before?

author: TimFox
author_rank: Super Contributor
timestamp: September 23, 2025, 11:34:15 pm
content: I have two Clarostat 240Cs, and recommend them highly.The photos of your suspect unit show carbon composition resistors, mounted on standoffs, obviously built by someone in a Clarostat housing.The actual 240Cs use four wirewound resistors per decade (1, 2, 4, & 4?), with appropriately-coded rotary switches to obtain (0 to 9) x 10nin 10 steps.

author: Bud
author_rank: Super Contributor
timestamp: September 24, 2025, 12:03:25 am
content: Why do you guys love so much that precious dust in your equipment? Is it because it adds authenticity or something? I would be ashamed to post dusty equipment photos, let alone in "Test Equipment" board.

author: HalFoster
author_rank: Frequent Contributor
timestamp: September 24, 2025, 07:58:44 am
content: Tim- Yep, this is my 33rd - as I stated in my original post, I enjoy refurbishing them.Bud - Not sure if you are trying to be humorous or if you didn't bother to read my original post.
GW-INSTEK 1100 LCR meter - new PC software, not working?  - Page 1
Forum section: electronics / testgear

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: September 21, 2025, 05:12:35 pm
content: A short while ago I did avideo reviewof the GW-INSTEK 1100 LCR meter, and also showed some DIY quasi-sweep software.A couple of days ago, GW INSTEK released new Windows software itself (PC Software version 2.00, dated 16-9-2025). I was keen to see how that software is, but when downloading it, the only thing I got was an “LCR-1000 PC SW_V2.00.ms_” file, of which I am not sure how to install it…Am I overlooking the install procedure for *.MS_ files, or did GW INSTEK publish something incomplete>?Best, Rudi

author: KungFuJosh
author_rank: Super Contributor
timestamp: September 21, 2025, 05:14:52 pm
content: Try changing the extension to .msi and see if it works. They might have used the underscore to avoid problems downloading.ETA: Yup, I just tested it. Rename the extension and it will work for you. You might need to allow it to run as it's not signed.

author: RBBVNL9
author_rank: Frequent Contributor
timestamp: September 22, 2025, 05:23:40 pm
content: KungFuJosh,Thanks a lot, that was precisely it. Now the new software is running.Since this was a 1.x to 2.00 update, I expected some major changes or functionalities, but can't really see any difference at all! And there is no change log either, so no idea what changed - if anything at all.Best, Rudi

author: KungFuJosh
author_rank: Super Contributor
timestamp: September 22, 2025, 06:44:04 pm
content: Well, you know at least the version number changed.