hybridfree/eevblog-posts huggingface dataset:
TDS3000 Backlight replacement - Page 1
Forum section: electronics / testgear

author: matth
author_rank: Contributor
timestamp: April 24, 2024, 04:34:17 am
content: I have been reading various threads about backlight replacements for my TDS3000 scope.I am tossing up between replacing the CCFL with LED, however I do hear that there will be an impact on the colours due to the colour temp of the LEDs. The CCFLs are hard to get. I can get some from Plazmo.com but with shipping they are getting expensive and international shipping has no guarantee they will arrive intact). Aliexpress tubes are an unknown (no specs).So I am leaning to replacing the CCFL with LEDs but I am not sure what LED strips will fit. The CCFL tubes are 2.6mm but most retrofit LED strips are 4mm so looking for advice from people who have done this mod as to whether a 4mm LED strip will fit in the CCFL tracks in these scopes.Also keen for others' mileage.M

author: MarkL
author_rank: Unknown
timestamp: April 24, 2024, 02:42:09 pm
content: Perhaps you've read these already:https://www.eevblog.com/forum/testgear/tektronix-tds3xxx-replacing-backlight-power-supply-fan-etc-(photos)/msg5056963/#msg5056963https://www.eevblog.com/forum/repair/tds3000-series-ccfl-upgrade-to-led/msg3853634/#msg3853634https://www.eevblog.com/forum/testgear/led-strips-to-replace-cfl-tubes-in-tds3000-series-scopes/msg3622656/#msg3622656If you still want to consider a CCFL replacement:https://www.eevblog.com/forum/testgear/tek-tds-3054b-vs-tds-744a/msg539810/#msg539810The bare tubes are still available from ccflwarehouse.com and you'll have to solder them in the old CCFL slide-in modules (qty 2). This is what I opted to do and I think was the simplest path. The color rendering on the replacement tubes is ok, but not as good as the original tubes. The replacements are more blue-ish, but at least the brightness is back to new.

author: JusTideaFIX
author_rank: Contributor
timestamp: August 24, 2024, 03:35:28 pm
content: A 4mm wide strip will not fit into its own metal holder. The most advantageous solution is to use 3 mm wide strips. Color distortion is not a big problem. The colors are initially of low quality due to outdated technology and poor choice of oscilloscope interface colors by the developers of the device themselves.After replacing with LEDs, you will get a color correction effect similar to the images below (It is necessary to adjust the current on the LEDs to a safe value). But the screen itself will not allow you to make the image perfect. Viewing angles will remain just as bad.Personally, I like the picture after correction better.I used a cheap "Universal LED Backlight Strip Light Kit. CCFL Screen To LED" from China from Aliexpress.

author: IM3
author_rank: Contributor
timestamp: October 27, 2024, 04:54:02 pm
content: Quote from: JusTideaFIX on August 24, 2024, 03:35:28 pmCan you cut those LED strips to the right length needed ?

author: picburner
author_rank: Frequent Contributor
timestamp: October 28, 2024, 05:05:33 am
content: Usually you can break the strip every 3 LEDs.
HP 5350B - Noise on input - Page 1
Forum section: electronics / testgear

author: W4PJB
author_rank: Regular Contributor
timestamp: October 22, 2024, 07:48:22 pm
content: I have an 5350B with a LOT of electrical noise coming from the input of my 5350B counter. As in, sweeping signals approaching 0dBm! Something tells me this is not normal for these counters. I'll include a pic below. I noticed this when I was having issues with accurate readings on some frequencies, particularly with one SG. I have to really crank up the amplitude to get over the noise or it reads hundreds of MHz low at 4GHz. It's fine around 2GHz, but as you can see from the photo, the noise is much lower in that range also.I'd be interested to hear others experience on this. Please note, I had the 8566B SA set at -10dBm, and a 10dBm pad in line. My pad was only rated for 4GHz, so it's likely the noise is happening at much higher frequencies, but it's not making it through the pad. So if anyone tries this I'd put some attenuation in line to be safe as the signals are strong.

author: Orange
author_rank: Frequent Contributor
timestamp: October 22, 2024, 11:56:59 pm
content: The signals that you see on the SA are coming from the synthesizer comb generator in the 5350.This is not normal for a good 5350B. I'm afraid the sampler bridge (U1) in the 5350B has at least one damaged diode (probably short) which shorts the LO of the comb generator to the input to the counter.Counter sensitivity is compromised as well if this is the caseThis difficult to repair, best is to look for a replacement microwave module.

author: W4PJB
author_rank: Regular Contributor
timestamp: October 23, 2024, 12:38:10 am
content: Hi Orange,Thank you for your reply. I had suspected this was from a "leak" in the sample bridge and replacing the A12 module would be the fix. I was just hoping it wouldn't be, as they are neither cheap nor easy to find! And yes, it is absolutely killing the sensitively!
Tripplett 630-PL Type 5 rotary switch - Page 1
Forum section: electronics / testgear

author: BeBuLamar
author_rank: Super Contributor
timestamp: October 30, 2024, 04:01:22 pm
content: I got a very nice condition Triplett 630-PL Type 5 from estate sales for $25. Everything works well except the 10VAC and 3VAC range don't work well. I found because the rotary switch doesn't make good contact at those positions. At first the 2 positions didn't work at all but after I spray some deoxit in the switch it works but sometimes I still have to move the switch back and forth a bit to get it to work. I wonder how to clean the switch better? Can it be taken apart? How tough is it to do so?
DHO914 battery - Page 1
Forum section: electronics / testgear

author: Murayama
author_rank: Contributor
timestamp: September 25, 2024, 06:29:30 am
content: Hello!Just received a DSO9014.Does anyone know if DHO914 can be powered with a battery?I read something about batteries, don't use batteries except those recommended by Rigol, usual blah blah,but I don't see any battery hatch on the case. I also tried to power it with USB-C on the back side (insteadof the power supply), and it doesn't work. They probably use a higher voltage. Any hint welcome.Thanks!

author: csuhi17
author_rank: Frequent Contributor
timestamp: September 25, 2024, 06:48:40 am
content: https://www.eevblog.com/forum/testgear/suitable-usb-c-powerbank-for-rigol-dho800900-series/msg5321621/#msg5321621https://www.eevblog.com/forum/testgear/powerbanks-tested-with-dho800900/msg5262675/#msg5262675

author: Bryn
author_rank: Regular Contributor
timestamp: September 25, 2024, 06:51:00 am
content: Yes, it can be powered by a battery... but unfortunately not with the one you just got (sorry if it's a wasted purchase). While both devices may share similar power requirements, they typically use different battery configurations and connections and that battery you mentioned would only work with a certain model it's made for.However, it can be powered with USB-C power adapter or a power bank with the same kind of connectivity.EDIT: Got ninja'd by csuhi17... damn.

author: Murayama
author_rank: Contributor
timestamp: September 25, 2024, 06:58:59 am
content: Hello!Thanks for your reply. Apparently some powerbanks do work, some other don't. Just for info, I was using an Anker, 20000mAh.so be sure before buying, not to buy this model. Well, it's a bit old now, so there are probably newer types.Thanks

author: Murayama
author_rank: Contributor
timestamp: September 25, 2024, 07:01:23 am
content: Hello!Quote from: Bryn on September 25, 2024, 06:51:00 amHow did you know? I just wrote I'm using a power pack.By the way, what do you mean by "the one you just got"? The scope? The power pack?Thanks

author: csuhi17
author_rank: Frequent Contributor
timestamp: September 25, 2024, 07:14:44 am
content: Powerbank.not all powerbank compatible with the scope

author: Fungus
author_rank: Super Contributor
timestamp: September 25, 2024, 07:37:49 am
content: The 'scope needs 12V, 36W (power delivery profile 3).If your power bank supports that mode then it should work.https://en.wikipedia.org/wiki/USB_hardware#USB_Power_Delivery

author: RogerG
author_rank: Regular Contributor
timestamp: October 22, 2024, 12:05:04 pm
content: Since USB PD 2.0 V1.2 the 12V profile is deprecated. At newer power supplies (other than the Rigol DHO "first edition" 12V PS) or power banks the DHO will always negotiate 15V/3A instead. So the power bank must be able to deliver 15V with enough power.
Agilent Logic Analyzers 90-pin connectors reference - Page 1
Forum section: electronics / testgear

author: F1GWR
author_rank: Regular Contributor
timestamp: October 21, 2024, 06:35:12 pm
content: Hi,Considering refurb pods demential prices, I'm planning to rebuild a series of Agilent E5382A-like pods. Flat cables of 16700 series input on "90-pin high-density connectors".Found nowhere any reference for a male mating connector. And Mousikey is a real maze for connectors.Anyone has the answer?Best,ChristianReferences:https://www.keysight.com/zz/en/assets/9018-02385/user-manuals/9018-02385.pdf?success=truehttps://www.techtravels.org/2021/02/hp-agilent-5382a-tear-down-with-photos/

author: MarkL
author_rank: Unknown
timestamp: October 21, 2024, 07:51:03 pm
content: It's definitely a Samtec part (has the "S" logo), and could be TFML-145-01-L-D:https://www.samtec.com/products/tfml-145-01-l-dA brief search on Octopart doesn't show availability anywhere, but it looks like Mouser and others can backorder it for you, or you could possibly order directly from Samtec.Alternatively, you could start with any of the 90-pin probe adapters and use it for parts. Right now there are a bunch of E5380B probe sets (90-pin to Mictor) on everyone's favorite auction site for non-insane prices ($15 ea.). If your signals are slow enough, you could create a Mictor to flying lead adapter.Edit/correction: The listing is actually for the "E5380A" if you go looking for it. Same functionality as the "B" version, just a later rev.
Tektronix TDS3054B - should I update to latest firmware from V3.35? - Page 1
Forum section: electronics / testgear

author: stevehall
author_rank: Newbie
timestamp: October 21, 2024, 02:35:32 am
content: Everyone,I am a new member, this is my first post. I have a TDS3054B that came with version 3.35 firmware. It's a new enough firmware version that it has the FFT and advanced triggering features enabled. Would there be any benefit to updating to the latest firmware version? Are there likely to be any significant improvements or bug fixes in the latest firmware version that aren't in 3.35?Thanks in advance!Steve

author: coromonadalix
author_rank: Super Contributor
timestamp: October 21, 2024, 10:16:08 am
content: there is a saying, aint broke dont fix it ...but normally on Fw updates there is stability or usability corrections or else, normally try to find any related Fw updates listsSome did hack the bw on theses series and put the last fw, i think was 3.41 ??and be sure it applies to your model ...but avoid doing mistakes etc ... and possibly brick a working scope ...
Needs help of HP 8510 cable DIY - Page 1
Forum section: electronics / testgear

author: BillyGo
author_rank: Contributor
timestamp: October 07, 2024, 12:18:34 am
content: Basically, I got a set of HP 8510C for free recently, but it didn't come with any original cable.It needs some non universal cable that costs more than 400$ on ebay, I probably need to figure out a way to make them myself.08510-60101 for connection between VNA and display, both male 37 D-SUB on each side.08510-60102 for IF signal between S-parameter test set, 24W7 D-SUB with coaxial contact, one male and female on the other.I ordered the right connector already, now the problem is to findout the correct order. Can anyone with 8510 check their pinout of these two with a multimeter?Thanks for any related clues.

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 07, 2024, 01:25:05 am
content: I thought I could find it in the service manual, but there was no schematic.https://www.glkinst.com/cables/hp_cables.htm#8510

author: BillyGo
author_rank: Contributor
timestamp: October 07, 2024, 02:44:02 pm
content: Quote from: squadchannel on October 07, 2024, 01:25:05 amThe block diagram in the service manual was too basic.This guy obviously doesn't provide the best offer

author: bergenhut
author_rank: Contributor
timestamp: October 14, 2024, 10:42:53 am
content: Hi,Here are some pics of the 2 cables for the HP 8510 system in questionThey are 1 to 1Both cables are fully sheilded, with the sheild at both ends connected to the metal cases and Not to any pins.The 08510-60101 cable- Pin 37 is NOT connected at both ends

author: BillyGo
author_rank: Contributor
timestamp: October 21, 2024, 12:06:01 am
content: Thank you so much!!Looks like 08510-60101 can be replaced by any normal DB37 cable!I couldn't identify whether the signal wires of 08510-60102 were twisted pairs. From the picture they were the same as the none twisted cable inside 08510-60101. I might try with some normal 23AWG cables for my DIY first.
Anyone Mod'd RIGOL DM3058E to Increase Volume of Test-tone Beeper? - Page 1
Forum section: electronics / testgear

author: GrievousAngel
author_rank: Contributor
timestamp: February 19, 2021, 12:37:46 am
content: I can hardly hear the beeper (from many years of playing on stage), so I have to keep looking up and over to see DM3058 display. Then my porbe slips and I curse loudly yet again! I've looked into it some. Rigol told me that you should be able increase the beeper volume via code accessible via the USB port. It's not adjustable at instrument's 'skin' level.This is RIGOL's reply:Hi William,Just get an update from my supervisor. We have an undocumented for the beeper sound::SYSTem:BEEPer:VOLUme <value> 2<=value<30You can use our Ultrasigma software to type the command to see if the sound changes a little bit.Here is the Ultrasigma download link and user guide:https://beyondmeasure.rigoltech.com/acton/attachment/1579/u-0003/0/-/-/-/-/https://rigol.force.com/support/s/article/ultrasigma-users-guide1Best regards,Sheng FangTechnical Support SpecialistRigol Technologies USA8140 SW Nimbus Ave, Beaverton, OR 97008--------------- Original Message ---------------From: RIGOL Support [help@rigol.com]Sent: 12/28/2020 8:55 AMTo: grievousangel.wtj@gmail.comSubject: Re: Fwd: RigolNA.com Wesite Contact [ ref:_00DA0IWhw._5004w229qr3:ref ]Hi William,I don't think there is a way to adjust the volume through programming.Here is the programming manual for DM3058/3058Ehttps://beyondmeasure.rigoltech.com/acton/attachment/1579/f-003f/0/-/-/-/-/file.pdfI tried to hack that section of code but I ran into a few obstacles attempting to enter. It wasn't like the Online examples.Anyone been successful doing this or interested in trying?Later,GrievousAngel

author: Gary350z
author_rank: Regular Contributor
timestamp: February 19, 2021, 05:42:43 pm
content: I have been wondering about this for along time. The beeper loudness in mine is very low, in a quiet lab, and I have average hearing.I find it hard to believe it was designed this low because you probably could not hear it in a somewhat noisy lab.Have you looked inside? I'm curious if the cover sticker has been removed form the beeper.I have searched for answers to this problem, but have found nothing. Does everyone think this is a acceptable?Let me know what you find out.

author: H.O
author_rank: Frequent Contributor
timestamp: February 19, 2021, 09:24:19 pm
content: FWIW: I tried this undocumented command on my DM3068 and I can't seem to get it to do anything.

author: Gary350z
author_rank: Regular Contributor
timestamp: February 22, 2021, 12:07:39 pm
content: Bump

author: GrievousAngel
author_rank: Contributor
timestamp: October 19, 2024, 12:54:54 pm
content: I tried it with no results as well.I just found this info on Rigol's skite:For instance, try :SYST:BEEP:VOLU 12You can send these from SCPI Communicator in UltraSigma. Here is the download link for Ultra Sigma. Right click the instrument->select SCPI control panel->then type the above command in it.Has anyone tried this?Anyone succeeded yet?Later, Billy
Siglent SDS2000X Option Unlocking - Page 1
Forum section: electronics / testgear

author: rh1
author_rank: Newbie
timestamp: January 06, 2022, 11:31:56 am
content: Yet another request for Siglent SDS2000X option unlocking assistance. I have been searching around both here and Google, all solutions seem to be for the Plus version which do not appear to work for the non-Plus version. This scope is getting old so I would have expected solutions to have emerged by now. In my case I have the SDS2304X and would like to use the AWG / WaveGen / function generator option. Does anybody have a method for this?Topics related to SDS2000X scope unlocking:Bandwidth hacking (requires hardware mod), mentions option unlocking but no procedures:https://www.eevblog.com/forum/testgear/siglent-sds2000x-hack/An older request for option unlocking:https://www.eevblog.com/forum/testgear/siglent-sds2000-hacking-unlocking/Thanks

author: MetalHead
author_rank: Contributor
timestamp: October 22, 2024, 07:06:30 am
content: Hello, curious if you found a way to unlock it?
Keysight MXA Reference Assembly A16 replacement - Page 1
Forum section: electronics / testgear

author: AndyEng
author_rank: Newbie
timestamp: October 18, 2024, 04:36:21 pm
content: Hello allI have MXA Analyzer. It is works good, but I need higher phase noise performance for some measurements. At present time, my analyzer have E4410-60108 reference assembly. This assembly used for devices with serials < MY/SG/US52330000 and have phase noise around -106 dBm/Hz@10 kHz. In documentation, I found, that devices with serials > MY/SG/US52330000 have different assembly N9020-60200 and higher phase noise performance –114 dBc/Hz@10 kHz. So my question is it possible to replace E4410-60108 to N9020-60200? Is it fit inside MXA with serials < MY/SG/US52330000 ?I noticed devices with serials > MY/SG/US52330000 also have different Chassis Base, Rear Panel numbers and I worry, maybe it is impossible to retrofit N9020-60200 inside...
Jerrold SS-300 sweep generator schematic - Page 1
Forum section: electronics / testgear

author: Byacey
author_rank: Newbie
timestamp: October 18, 2024, 03:52:59 pm
content: Hi,I'm looking for a schematic for a Jerrold SS-300-7F sweep marker generator. Jerrold is long gone and I haven't been able to find much on the net. I did procure on years ago, but it was an older model and the schematics and alignment didn't apply to the version I have.Mine has an opamp in the drive and shaping circuits for the varactor; this is the info I'm looking for.Thanks
Topward 6303D power supply repair - Page 1
Forum section: electronics / testgear

author: anton74
author_rank: Contributor
timestamp: February 22, 2023, 12:47:53 pm
content: Hello,I am trying to repair a Topward 6303D power supply. The SLAVE channel works only in parallel mode with the MASTER channel; in individual mode the SLAVE channel does not respond to its voltage setting potentiometer. I believe the fault is somewhere in the commutation circuit. I tried to understand the commutation between the channels; unfortunately, it looks quite complicated. Attached is the circuit diagram of the unit. Maybe somebody could explain me the commutation of this device and/or give some directions. Thanks.

author: seronday
author_rank: Regular Contributor
timestamp: February 24, 2023, 03:25:09 am
content: I sympathise with you trying to follow the circuit diagram as it is drawn.The way it is laid out makes it very difficult to see how the control circuit operates.Some months ago I carried out some repairs to a Topward 6603D power supply, (The 60 volt 3Amp version), which is identical to the 6303D except for the transformer secondary voltage and additional series pass regulation transistors.I ended up re-drawing some parts of the circuit diagram so that it was easier for me to see how the control circuit operates.It may take a few days, but I can try to find my notes and hand re-drawn circuits to copy for you if that may help.Regards.

author: Smoke Bandit
author_rank: Newbie
timestamp: October 16, 2024, 04:44:45 am
content: Hi, I have one of these Topward PSU's with the master circuit amp control clamped down not allowing the current limit to work. The op amp has been changed so now think it is in the control circuit for the amp. As above, following the circuitry is proving to be a mission. Any chance you could share your redrawn circuit again please? Thanks and regards

author: seronday
author_rank: Regular Contributor
timestamp: October 18, 2024, 11:47:31 am
content: @Smoke Bandit.Appologies for the slow reply.At present I dont have any electronic copies of my hand drawn circuits.They were drawn in pencil and do not copy very well in my docunent scanner.As soon as time permits, I can try to redo them and make a copy for you.Regards.

author: Smoke Bandit
author_rank: Newbie
timestamp: October 18, 2024, 02:37:38 pm
content: Brilliant, thanks for your reply. Appreciated.
BSIDE has a new p5 network analyzer - Page 1
Forum section: electronics / testgear

author: RAPo
author_rank: Super Contributor
timestamp: October 02, 2024, 01:32:38 pm
content: Seeheredelivery from 1 november onwards.

author: Phil1977
author_rank: Frequent Contributor
timestamp: October 02, 2024, 01:48:29 pm
content: On the first glance it looks intriguing because the description title states up to 15GHz frequency range for less than €50!The test in the bitmaps sets the decimal point and then its "only" a usual mini-VNA clone up to 1.5GHz.

author: csuhi17
author_rank: Frequent Contributor
timestamp: October 02, 2024, 05:07:11 pm
content: Quote from: Phil1977 on October 02, 2024, 01:48:29 pmYou mean 1.5 GHz.15GHz seems to be a typo.

author: RAPo
author_rank: Super Contributor
timestamp: October 18, 2024, 02:13:37 pm
content: The VNA arrived today.It is just a regular VNA that goes to 1.5GHz (not 15GHz).The VNA is packed in a green sleeve that feels very comfy; you long to touch it. The sleeve is just like their S30 DMM.But the window in the sleeve to see the VNA screen is just a bit to tight on the right. You can see the stop frequency MH but the z from MHz is barely visible.The rocker switch is effortless to operate, you don't need the guitar pick.Delivered in a sturdy carrying case with two SMA<->SMA cables and a set of cals, and the familiar menu poster.The quality sticker is dated 2024.09.05The device is delivered with a 4GB SD-card.
CMU 200 - Added TG - Page 1
Forum section: electronics / testgear

author: wiredwrx
author_rank: Contributor
timestamp: July 15, 2020, 01:06:43 am
content: Since I work with repeaters, and radios, when I got the CMU 200, I felt it really needed a tracking generator, and missed not having one. There are several available options out there, from using computers and software, to hardware addition. I chose to order one from Ebay. (I ordered this onehttps://www.ebay.com/itm/CMU200-radio-services-monitor-source-tracking-generator-duplexer-measuring/142084270822?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649) When it arrived, I went about integrating the tracking generator into the unit. Here is a link to some pics, and descriptions. Hope people find it helpful and/or inspiring.As an aside, the unit works perfectly now, and satisfies my needs.https://imgur.com/a/DiAA7OfThanks,Michael

author: Rollin Hand
author_rank: Regular Contributor
timestamp: July 18, 2020, 03:18:30 pm
content: sir I only see 1 picture of the cmu .Can you extend the instalation information and performance Thanks.

author: wiredwrx
author_rank: Contributor
timestamp: July 20, 2020, 02:05:27 am
content: I thought I fixed that. Can you try the link in the post above and let me know. It might be because I am logged into my own account, but I did test the link in a different browser and it seemed to work fine.Actually, here it is again.https://imgur.com/a/DiAA7Of

author: tv84
author_rank: Super Contributor
timestamp: July 20, 2020, 04:00:27 pm
content: It works fine for me.

author: tazmadman
author_rank: Newbie
timestamp: October 17, 2024, 11:58:27 pm
content: Hi Wiredwrx i know this is a old post but is it possible to get a drawing of where the connections go between the cmu200 and the tracking generator please

author: tazmadman
author_rank: Newbie
timestamp: October 18, 2024, 05:04:29 am
content: Or does anyone have a connection diagram to add one to the cmu200 please
HP 3585A CRT Twitch - Page 1
Forum section: electronics / testgear

author: MarshallPlexi
author_rank: Contributor
timestamp: October 16, 2024, 07:28:24 pm
content: Afternoon all!I've had this HP 3585A for a few weeks now and it's been working great. Tonight I noticed that the CRT is, for lack of a better term, twitching. I took a video and you can see it more clearly once I turn down the CRT intensity later in the video. Also note the reference line is not as pure as it once was. It's almost striped looking now.Any idea what could be causing this? I would assume a power supply issue.

author: Grandchuck
author_rank: Super Contributor
timestamp: October 17, 2024, 03:44:39 pm
content: Can you open it up and look at the power rails with an oscilloscope?

author: KE5FX
author_rank: Super Contributor
timestamp: October 17, 2024, 11:32:52 pm
content: Doesn't look too bad. After checking the power rails and any electrolytic caps in the vicinity, you might try pre-emptively replacing all of the high-value carbon comp resistors in the focus chain and elsewhere. They are prone to drift and noise as they age, sometimes in ways that aren't apparent when tested at low voltages with an ohmmeter.
Tektronix thm series scope - Page 1
Forum section: electronics / testgear

author: Napalm2002
author_rank: Regular Contributor
timestamp: October 03, 2024, 12:17:22 am
content: Hello all I need a little help. I recently purchased a tektronix thm571 and it's missing the battery holder/ battery door. Can anyone help me out?

author: jal1234
author_rank: Contributor
timestamp: October 08, 2024, 11:53:23 pm
content: Try this:https://www.ebay.com/itm/276676533580?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=3r0QSilUTwG&sssrc=4429486&ssuid=Z_B_yX6WRIS&var=&widget_ver=artemis&media=COPYThe plastic in the original packs gets very brittle and break, so old ones are hard to find. They came in two basic types, one that took AA batteries, and the other with NiCds inside. The plastic case was the same, the AA version having contacts for the cells. There was also a rare external powersupply/interface/print adapter.

author: Napalm2002
author_rank: Regular Contributor
timestamp: October 11, 2024, 02:00:56 am
content: Thanks jeez thats pricy. I got the scope for a steal. Don't want to spend a ton and not be able to get it working.

author: factory
author_rank: Super Contributor
timestamp: October 11, 2024, 12:56:01 pm
content: Hopefully the seller wasn't able to power it up, this series of scopemeters are notorious for the surface mount electrolytics to leak & corrode, the leaked electrolyte is conductive & can take out the expensive DC-DC converter ICs when powered up, YMMV.David

author: jal1234
author_rank: Contributor
timestamp: October 11, 2024, 04:25:48 pm
content: Quote from: factory on October 11, 2024, 12:56:01 pmGood point. This youtube video shows the process the change the caps and the vulnerable ICs. Same scope, different firmware:https://youtu.be/NGWSTz83dHw

author: Napalm2002
author_rank: Regular Contributor
timestamp: October 17, 2024, 01:36:36 am
content: Yes I watched that video and ordered the new caps and the 2 ic chips just to be safe. Now I need some free time to go fix it. Thanks guys for the input
TH2851-130 and other inexpensive devices to measure LCR - Page 1
Forum section: electronics / testgear

author: egonotto
author_rank: Super Contributor
timestamp: October 16, 2024, 02:00:30 am
content: Hello,Here we can talk about LCR measuring devices, for which you don't want to open a separate thread.Best regardsegonotto

author: KungFuJosh
author_rank: Super Contributor
timestamp: October 16, 2024, 02:07:33 am
content: Love the title

author: egonotto
author_rank: Super Contributor
timestamp: October 16, 2024, 02:23:52 am
content: Hello,the Analog Discovery 3 has a price of about 2400 €/kg.The TH2851-130 weighs 14.5 kg. This is stated in the data sheet, which can be found athttps://www.meilhaus.de/th2851.htm.Best regardsegonotto

author: egonotto
author_rank: Super Contributor
timestamp: October 16, 2024, 02:34:07 am
content: Hello,I once used the Analog Discovery 3 to measure the capacitance of two wires in close proximity to each other.I carried out an “open” calibration before the measurement.Best regardsegonotto

author: egonotto
author_rank: Super Contributor
timestamp: October 16, 2024, 03:30:29 am
content: Hello,a capacitor with 50 nF and an inductor with 5 mH.Best regardsegonotto
Need firmware for cheap for frequency counter 7 digits - Page 1
Forum section: electronics / testgear

author: Andbro
author_rank: Regular Contributor
timestamp: October 15, 2024, 08:42:29 pm
content: Hi,I'm looking for the firmware for this cheap frequency counter 7 digits.Thank

author: coromonadalix
author_rank: Super Contributor
timestamp: October 15, 2024, 11:19:31 pm
content: would be nice to know model or any writing on the pcb ... my crystal ball doesn't work since it's based on an atmega you could be able to find some code on the web ...

author: robert.rozee
author_rank: Frequent Contributor
timestamp: October 16, 2024, 03:29:48 am
content: looks like it is this one:https://www.ebay.com/itm/156132471658with some additional photos here:https://www.ebay.com/itm/296310420888cheers,rob :-)
Finding quality probe tip replacements for Agilent N2772A Differential Probe. - Page 1
Forum section: electronics / testgear

author: Electrician Dude
author_rank: Newbie
timestamp: October 16, 2024, 01:32:29 am
content: Hi, this is my first post here I will try to keep it short and quick. I Recently Purchased a Agilent n2772A 600v 20 MHZ Differential probe second hand from someone who found it in a storage locker. The price I got was quite the deal at below $100 USD. This piece of test equipment will prove itself useful with time. As the projects I am working on frequently connect to rectified mains at 180V. With switching Mosfets operating at these voltages. The idea was to be able to freely measure voltage overshoot and transient voltage spikes in circuit live. The Differential probe seems incredibly well built and feels like a quality piece of test equipment. Since this came at such an incredible price I had no chance to be picky and bought the probe untested and without probe tips. The connector this probe uses is quite unfamiliar for an oscilloscope probe. It uses the Shrouded banana probe tip. This is the same connector that exists on most multimeter leads. And I mean it quite literally is the leads. I attached a picture of the probe tips plugged into my multimeter. It is quite the strange connector to use for such a thing. It does feel right however and has a good sturdy feel in my hand which I like. The question is where I should look to hunt down probe tips of a good quality that wont break the bank. I want to hear peoples input on what brands to look out for and what to avoid.I just purchased a Rigol DHO804. Since this is my first day using it I figured I would connect a screen capture. It is a measurement of a Klein multimeter in capacitance measuring mode. The multimeter outputs a 2.7V peak to peak sawtooth wave at 12.844 kHZ. Quite an interesting measurement to me. The probe tips quite literally fit directly into the standard multimeter socket. This was my test to see if the differential probe works.
siglent sds1102dl wrong firmware update, so not function... - Page 1
Forum section: electronics / testgear

author: sonielkraf
author_rank: Contributor
timestamp: October 14, 2024, 12:25:30 am
content: heloo everyone, my siglent sds1102dl was update firmware with sds1000cml, and then my scope is abnormaly...i need firmware sds1102dl, do you have? thank you

author: coromonadalix
author_rank: Super Contributor
timestamp: October 14, 2024, 12:36:50 am
content: try to contact member here Tautech, he maybe can supply you with recovery proceduresOH you already did ...........one attached

author: sonielkraf
author_rank: Contributor
timestamp: October 14, 2024, 12:41:54 am
content: i was contact tautech, i send email , maybe he is busy...

author: coromonadalix
author_rank: Super Contributor
timestamp: October 14, 2024, 12:45:48 am
content: file is posted check it

author: sonielkraf
author_rank: Contributor
timestamp: October 14, 2024, 12:52:25 am
content: ok thank you, i try to update, please wait for result.....thanks...

author: sonielkraf
author_rank: Contributor
timestamp: October 14, 2024, 01:07:34 am
content: thank you so much brother, my scope is back....but on ch2 any something, what happened? this is hardware problem?

author: BillyO
author_rank: Super Contributor
timestamp: October 14, 2024, 11:24:58 pm
content: If that scope has a self-calibration, try running it.

author: tautech
author_rank: Super Contributor
timestamp: October 15, 2024, 12:08:09 am
content: Quote from: sonielkraf on October 14, 2024, 01:07:34 amNo, it's a PBKAC issue.Input couplings are unequal.Quote from: BillyO on October 14, 2024, 11:24:58 pmDo this ^ too.

author: sonielkraf
author_rank: Contributor
timestamp: October 15, 2024, 02:30:34 pm
content: I was try do self calibration, is same result, what happens Mr. Tautech,? Any solution?

author: sonielkraf
author_rank: Contributor
timestamp: October 15, 2024, 02:50:13 pm
content: This is condition no probe, and zoom it, like ripple, not smooth

author: tautech
author_rank: Super Contributor
timestamp: October 15, 2024, 07:09:19 pm
content: Quote from: sonielkraf on October 15, 2024, 02:50:13 pmAnd probe input attenuation is set to what ?10x ?If sorealinput sensitivity is 100mV/div.

author: sonielkraf
author_rank: Contributor
timestamp: October 15, 2024, 10:12:55 pm
content: Attenuation set to 1x, I try set 10x but no effect....
E444x trigger in connector - Page 1
Forum section: electronics / testgear

author: alan.bain
author_rank: Regular Contributor
timestamp: October 15, 2024, 01:18:34 pm
content: I'm trying to replace a trigger in on a PSA (it has been squashed by an elephant) E444X series SA.It looks just like a 1250-0870 but in a variant for a thicker panel. The SM only suggests E4406-60139 as the replacement cable assy and the old connector unlike the old 1250- series doesn't have a number on it. Can anyone help identify?For reference the front of a 1250-0870 fits perfectly and works electrically, but when passed through the chassis plate too little protrudes to fully engage the bayonet of the BNC.Alan
Calibration signal on siglent sds1102dl is not smooth graphic, why?  - Page 1
Forum section: electronics / testgear

author: sonielkraf
author_rank: Contributor
timestamp: October 15, 2024, 02:25:37 pm
content: Hello, thanks before, my scope siglent sds1102dl, the calibration signal of 1khz is not smooth on horizontal line, why?problem on hardware?

author: coromonadalix
author_rank: Super Contributor
timestamp: October 15, 2024, 03:18:07 pm
content: please dont start another thread .... you could have redacted your 1st post title in your original onecould be power supply problems noises ...

author: sonielkraf
author_rank: Contributor
timestamp: October 15, 2024, 10:35:02 pm
content: :ok, the post will be delete
UT612 bad accuracy for the inductor, anyone experience? - Page 1
Forum section: electronics / testgear

author: dzungpham0703
author_rank: Newbie
timestamp: October 15, 2024, 07:13:04 am
content: I have just bought UT612.I have a project using common filter inductor, value in hundreds mH range and try to measure it but value difference with same parts.For example I measure the Wurth 750318652https://www.we-online.com/components/products/datasheet/750318652.pdf,the value on the manufacturer is 100mH at 10khz, but I measure with 10khz it show 25mH.And I try to measure some filter it show 180mH for 100mH value by manufacturer, they write it is 1khz measurement:https://www.lcsc.com/product-detail/Common-Mode-Filters_XR-XRUU9-8-100mH-V_C5358173.html.So the error rate is 80%So I am very disappointment about the UT612.I do it wrong or it is limitation of this device? Before by the UT612 I just read in the front page show range from 20uH-2000H and bought, it is my fault. The range is not for all frequency.I also try some power inductor like 33uh, 22uh and it accurate. But anythings bigger than 10mH show ridiculous value.
Hacking Keysight Agilent U1602B to U1604B - SOLVED! - Page 1
Forum section: electronics / testgear

author: rvalente
author_rank: Frequent Contributor
timestamp: April 13, 2021, 12:18:24 am
content: Hello Mates,i've scored a nice U1602B and I'm waiting for it to arrive...Anyone knows if its possible to hack the U1602B (20MHz) to U1604B (40MHz)?Greetings, Renan

author: rvalente
author_rank: Frequent Contributor
timestamp: April 13, 2021, 10:16:00 pm
content: Just got the equipment from the mailChecked the firmware and was out of date,Got the U1600 firmware update tool from Keysight site..Though... what if I upload the 1604B firmware instead of the 1602B?Turns out it worked, can go down to 10ns now (was 50ns before), FFT is enabled!And it pass self-cal! Could not have been better!

author: TheSteve
author_rank: Unknown
timestamp: April 14, 2021, 04:04:24 am
content: It sounds promising but to really know if you have the additional bandwidth you'll need to feed in a signal with an RF gen to verify the 3 dB point or measure the rise time of a known fast enough square wave.

author: rvalente
author_rank: Frequent Contributor
timestamp: April 14, 2021, 01:46:57 pm
content: Quote from: TheSteve on April 14, 2021, 04:04:24 amI'm still investigating it but seems no true BW upgradehum, we may try a little further... I tested with my 8656A today...The FFT is enabledThe vertical 25ns and 10ns makes no difference, frequency measurement doubles and quadruplesCan't see signals beyond 26Mhz the trigger gets funny, -3dB point is 25.3MHz, with firmware 1.1.5 for 1604B or 1602B, makes no difference.So, its a half a hack, enables a near to useless FFT mode.I believe the FPGA must be updated or maybe a resistor config in board.One thing I've noticed at version 1.1.5 in both 1602B and 1604B, the measurement menus does not works properly after update. You cant select measurements, the scope works fine but the values wont "select", there is a workaround tough, to do a power cycle.I've flashed the 1602B firmware back and open a ticket with Keysight, that's a serious bug

author: TheSteve
author_rank: Unknown
timestamp: April 14, 2021, 06:57:19 pm
content: The front end physical filters may be different, or it could just be a jumper to select the bandwidth. Newer stuff often changes max freq in software but they are of an older design so it wouldn't surprise me if the lowpass filters have different values

author: satanistik
author_rank: Contributor
timestamp: October 15, 2024, 06:59:27 am
content: Can You post update file and firmware loader tool? Agilent remove it from webpage. I need flasch dump from U1602 or U1604, someone have backup copy?
R&S NMG202 feedback - Page 1
Forum section: electronics / testgear

author: jc101
author_rank: Frequent Contributor
timestamp: October 14, 2024, 05:03:26 pm
content: Anyone have an NGM202 or NGM201 they would like to pass comment on?Looking at replacing my Keithley 2281S-20-6 with an NGM202, specifically the bundle offer NGM-COM2B. The Keithley is OK, but it doesn't let you generate battery models. Well, it does, but only at a discharge of 1A. There looks to be software available for the NGM series to create battery models. The R&S is also two channel, so can simulate two batteries at once. This would also be handy for an upcoming project.After a trawl around I've not found much online about the NGM series. Just a few write ups from around the launch in 2019/2020. So I'd be interested for any feedback from anyone who has one.I did fill in the form on the R&S (UK) website for a quote. Zero response from that thus far, which is a little disappointing. It would be a company purchase.
DHO800-900 Android unlock  - Page 1
Forum section: electronics / testgear

author: UIQ
author_rank: Newbie
timestamp: October 13, 2024, 07:00:58 pm
content: I don't know if any guide already exists. If anyone is interested I'll try to write one.Only keyboard and mouse are required.No hacks, no ADBUPDATE:1 -Connect the scope to interne via ehernet.2 -Connect an USB keyboard and mouse (mouse not mandatory)Launcher install:3 -Type win+B to start Lightning Browser.4 -Search for "ruthless apkpure" or type directlyhttps://apkpure.com/it/ruthless-launcher/shubh.ruthless.5 -Download the Apk.6 -Type win+N to open notifications. Wait the download to complete then click to install.7 -Once installed, type win+N, open android settings and search for "home"8 -Select "Home app" then change default launcher from "Launcher" to "Ruthless".9 -Now if you type Win+ENTER you should see your new home.10-Swipe up to open the app drawer and tap on Explorer. Leave it open.Go to your pc and download:11-Soft Keys apk fromhttps://apkpure.com/soft-keys-home-back-buttons/com.softkeys.homebuttonandbackbutton12-Floris Board 0.4.0 apk fromhttps://f-droid.org/it/packages/dev.patrickgold.florisboard/13-Put APKs on a pendrive and insert into the scope.14-Using Explorer opened before, navigate to USB then install and configure both softkeys and keyboard.DONE!Now you can access your Android home with the softkeys and install any application compatible with Android 7.To restore the scope to its previous state, use a file explorer to delete all the downloaded files, uninstall all the apps then go to settings>home and restore the default launcher "Launcher".The suggested APKs are not mandatory, you can choose other launcher, soft keys aNd keyboard compatible with android 7.Disclaimer: the procedure looks pretty safe but you try at your own risk!

author: moffy
author_rank: Super Contributor
timestamp: October 13, 2024, 11:30:29 pm
content: You might wish to post this in the 'Test Equipment' section of the forum.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 14, 2024, 12:50:00 am
content: would be nice to tell us HOW ?

author: UIQ
author_rank: Newbie
timestamp: October 14, 2024, 01:24:38 pm
content: Updated with guide.
LeCroy WR6050 Custom BIOS - Page 1
Forum section: electronics / testgear

author: jfoster
author_rank: Newbie
timestamp: October 13, 2024, 08:48:43 pm
content: I have a LeCroy WR6050 (Intel D865GLC motherboard) and tried to get SATA SSD working but was unsuccessful. I thought doing a BIOS update would help recognize the SSD but it seems LeCroy has some kind of custom BIOS where it has settings for the AGP video card. Now I've updated the BIOS but the onboard LCD doesn't work and the scope doesn't boot unless I plug in a VGA monitor then the onboard LCD works fine after Win2000 loads.Does anyone have a copy of the original BIOS for WR6050 so I can reflash? I didn't think to make a copy of the original BIOS.I've tried messing with the video card settings in the BIOS but no luck.I'm going to LeCroy but I don't have high hopes...

author: coromonadalix
author_rank: Super Contributor
timestamp: October 14, 2024, 12:14:13 am
content: normally theses mobo don't have any lcd interfaces on them, you should have somekind of lcd interface card, or something on the agp port .... to do this kind of interfacecan you access your windows device manager and check any exclamation mark, you have how to on the web .. and you should have software / drivers to do so ....you have Lecroy Groups on Groups.IO for the same questions, no real answers yetthere is a p11 bios versionhttps://drivers.plus/it/intel-d865glc-bios-p11/9682/p15https://drivers.plus/it/intel-d865glc-bios-p15/9681/old threadhttps://www.eevblog.com/forum/testgear/intel-d865glc-in-wr6030a-dead/this thread as some lecroy bin files attached herehttps://www.eevblog.com/forum/repair/tds5054b-nv-av-bios-file/

author: jfoster
author_rank: Newbie
timestamp: October 14, 2024, 04:47:15 am
content: Thank you very much! I flashed P15 bios version and got it working again.I'm not sure what is the difference between P11, P15, P10, etc. I tried other versions before posting (P10, P25) and didn't work, so I assume they all have slightly different configurations?
Hp 6181/6177 guard terminal  - Page 1
Forum section: electronics / testgear

author: coppercone2
author_rank: Super Contributor
timestamp: October 13, 2024, 05:31:03 am
content: I am curious about the guard terminal on this unit, which is screw terminal A0.The manual does not say much about it.Are you supposed to use it with a triaxial cable for really low level settings?I was planning on doing a lower current range mod , so it has a setting for 250uA full scale, described here in reply 10https://www.eevblog.com/forum/repair/hp-6177c-dc-current-source-repair-and-restoration-(complete)/Also, I thought about adding a guard banana jack to the front panel if that is what it does.... I thought it might be useful if you have it set to ~75 nanoamps (0.03 percent of 250uA range) if it works.

author: coppercone2
author_rank: Super Contributor
timestamp: October 13, 2024, 05:14:57 pm
content: my main concern is something with capacitance, I think. Can the guard thing deal with the cable capacitance

author: coppercone2
author_rank: Super Contributor
timestamp: October 14, 2024, 03:07:15 am
content: ah, it looks like the imonitor is connected to guard and its a front panel thing.but it says nothing about using it for guard shields. perhaps with a 250uA FS mod, it might make sense. Tempted to try bigger resistors there too see how low the full scale can go (i.e. 90k ohm)at 100V it seems like it almost makes sense to have a guard capability. Like if you connect the guard to another prototype PCB's guard. Then the guard might even be useful, even if the cable is not the source of leakage, so its a good capability to have.
Anyone have a Cami Research CableEye M2 M3 M2+ M3+ Cable Tester?  - Page 1
Forum section: electronics / testgear

author: KG7AMV
author_rank: Frequent Contributor
timestamp: July 03, 2024, 10:34:14 pm
content: I have a Cami Research CableEye M2 Cable Tester on the way. I will do a teardown of it.I have not received the machine yet will be here any day. I have registered the unit and have downloaded the software V4.3.15 Anyone have a later version of the software?I just Received my 1st set of Connector Boards for some cables I plan on testing.I have also started on making the connector board PCB footprint. I will post the easyeda project files on my blog once I get the fit fine tuned!

author: KG7AMV
author_rank: Frequent Contributor
timestamp: July 06, 2024, 03:39:20 am
content: I have started the teardown. Not Much to it inside.

author: Messtechniker
author_rank: Frequent Contributor
timestamp: July 06, 2024, 04:31:13 am
content: Not much to it? Some 80+ chips and some 20 resistor arrays plus all the other stuff.Easy to build yourself.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: July 06, 2024, 04:50:45 am
content: Except for the PAL pretty sure it's going to be locked.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: August 22, 2024, 05:56:02 pm
content: Snagged a M3U the other day... It Should be arriving Thursday the 22nd or Friday the 23rdI now have Version V5.3 Thats the Version the M3U was Shipped with.I Noticed in settings it Listed the M2 so I plugged it in and detected it.I have to say V5.3 is better then the V4.3Someone out there must have newer software? Latest Version is V6.2 B-1905Cable I Made for my Data I/O 29B.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: October 10, 2024, 02:34:35 am
content: I got another cable eye m3 this one came with Software Version 5.4.240-1277. I conform it works with the Serial M2 units. V5.4 is a lot larger then 5.3 39 MB vs 102 MB

author: KG7AMV
author_rank: Frequent Contributor
timestamp: October 17, 2024, 08:51:14 am
content: here is the M3U Main Board, I have Backed up the MCU. Still looking for a M4.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: October 18, 2024, 09:33:38 am
content: One of the Cami Research M3U's has a Bridge Check (High Impedance) error. No time to diagnose it right now a project for another day.