hybridfree/eevblog-posts huggingface dataset:
Agilent N4906A Serial BERT - not booting - Page 1
Forum section: electronics / testgear

author: ZBIQ
author_rank: Contributor
timestamp: April 29, 2020, 07:14:28 pm
content: Hi folks,I have just purchased Agilent N4906A for about 100$Obviously, not working.... However, the 3.5 mm solely are worth the price (not mentioning about the microwave beautifull elements inside).Anyway, there is the story:In the beginning, BERt didn't respond at all. Just fan made some noise, but after a few knocks on the power supply housing, it started to work. There are some loose cables inside or shortage to the metal cage. I will check it tomorrow.Then the device started (meanwhile I removed the two inserts with RF connectors and other stuff):but it sticks in such a state forever. The LCD is illuminated, but displays nothing, as well as the external VGA port is not giving any signs of life.I checked all power supplies and voltages, which seem to be OK. However, there are signs of previous repairs: mainly in the power supply management - two inline ICs are missing and their pins are shorted with extra wires. I suspect they were used for current monitoring or delayed turn-on.No sounds from the speaker, even after jumping "reset" goldpins on the motherboard.The motherboard is 86130-60062 with Pentium MMX:https://www.artisantg.com/TestMeasurement/98441-8/RadiSys_60_0500_02_CPU_BoardWhile "booting" LEDs are blinking and they stabilize in this state:BIOS section:RAM:HDD (it starts ok and works quietly):Since the Motherboard is especially suited for this instrument, how to start debugging? I will try to connect to the IOIO serial port at the rear panel. Do you think that GPIB will give any signs?Do you have any clue what could have gone wrong with this MOBO? This device has the last calibration date due to 2017, so it was operational no so far ago.Thanks!Mateusz
Keysight 1200x firmware upgrade - Page 1
Forum section: electronics / testgear

author: Propaganda
author_rank: Newbie
timestamp: April 20, 2020, 10:05:08 pm
content: Has anyone else tried the new firmware upgrade? I have a DSOC1204G that I recently upgraded to firmware "1200XSeries.02.10.2019111333.ksx". After the firmware upgrade my LAN no longer works. The "IO Overview" shows "Status: LAN failure" I have tried several known good working Ethernet cables and also connecting to several different switches. The LAN interface worked before this update. I see standard blinking status lights on the Ethernet port but if I try to alter any settings such as applying the "automatic config" i get a message on the screen saying "The network cable is disconnected". I would try downgrading my firmware but there is no older firmware available for this device on the site. Anyone have access to the old firmware by any chance?

author: stafil
author_rank: Regular Contributor
timestamp: April 20, 2020, 10:16:16 pm
content: I am using 1200XSeries.02.10.2019111333.ksx on my 1204A with no problem.Have you tried factory reset?

author: Propaganda
author_rank: Newbie
timestamp: April 29, 2020, 11:56:43 pm
content: I contacted Keysight and they wanted me to send my scope in so they sent me a loaner to use while mine is gone. Loaner came with newest firmware installed and appears to have the same issue. So I forgot I posted here and read your post and figured it couldn't hurt to reset the loaner so I did the factory reset and the secure erase for good measure. After the reboot on the secure erase ethernet is functional! Did the same on my scope and it is working now as well. I guess for some scopes the upgrade mucks things up that must be cleared. In any case thanks for the help!

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: April 30, 2020, 09:52:51 pm
content: Weird. Glad the support team got you sqaured away, please let them know all this info as well so they can feed it back to the R&D teams!
Pulse generator recommendation - Page 1
Forum section: electronics / testgear

author: HalFoster
author_rank: Frequent Contributor
timestamp: April 29, 2020, 05:06:09 pm
content: All:I'm looking for a relatively simple pulse generator, primarily to be used to check oscilloscopes rise and fall times. I would like it to be capable of configurable rise and fall times with the fastest being below 1 ns, below 500 ps would be nice, at output voltages of at least a couple volts PP. At the moment I have a HP 8082A that is capable of ~1.5 ns at best - have not been able to adjust it to the ~1 ns in the original specs.I don't need it to be able to do much more than the above at differing frequencies - I would be happy with a 200 MHZ top end but would like it to still output a square wave, not sine as the 8082A tends to do at the top end. So far my biggest issue had been finding one with the adjustable rise and fall times - I have TE that does the adjustable times and I have TE that does stupid fast rise times (Anritsu MP1652A) - I'm just having a hard time finding it all in one, somewhat simple, package.Not terribly concerned over any particular manufacturer but a reasonable base quality and the availability of service manuals is a definite plus.Thanks,Hal
RSA3015E Opinion - Page 1
Forum section: electronics / testgear

author: Nassim
author_rank: Contributor
timestamp: April 29, 2020, 07:43:02 am
content: I wa thinking about buying a Spectrum analyzer for getting started with emi pre-compliance.After some research i was ready to go with the SVA1015x, but then i saw the Rigol RSA3015E-TG.I couldnt find anything at the forum.Does anyone here have some experiences with this device ?Nassim

author: tautech
author_rank: Super Contributor
timestamp: April 29, 2020, 08:29:48 am
content: Quote from: Nassim on April 29, 2020, 07:43:02 amSVA's are SA/VNA combo's and the bit cheaper SSA's are dedicated spectrum analyzers covering models from 2.1 GHz to 7.5 GHz in the recently updated SSA3000X Plus range.Any of the SSA/SVA range is quite capable of EMI pre compliance work.

author: Sighound36
author_rank: Frequent Contributor
timestamp: April 29, 2020, 09:00:40 am
content: I have both the Siglent SVA1015x and a Rigol RSA5065 both are more than capable of performing pre compliance work plus the Siglent is a VNA as well. The Rigol has a better SSB phase noise and danl plus a real time bandwidth ability.The E version of the Rigol is more expensive than the Siglent SVA1015x both are good at what they do. For me low noise and RTA would swing it however if these are not important then the SVA1015x is worth the investment

author: Nassim
author_rank: Contributor
timestamp: April 29, 2020, 10:12:48 am
content: Quote from: Sighound36 on April 29, 2020, 09:00:40 amThank you i for your thoughts
Rigol DS1052E firmware update worth the risk? - Page 1
Forum section: electronics / testgear

author: theleakydiode
author_rank: Regular Contributor
timestamp: April 27, 2020, 10:56:18 pm
content: Hi,I've currently got00.03.01installed (Hard version 58) and don't recall having updated the firmware before and I've definitely not performed any of the hacks, I notice the latest firmware available is00.04.02.01.00so quite a leap. I think the scope was purchased in 2012 or 2013.I know "if it ain't broke, don't fix it" but with quite a leap I'm now curious if I'm missing out on squeezing a bit more from this scope, I know it's considered an old model now but as a hobbyist it still does what I need.Has anyone still got one of these scopes and if so have you ever updated the firmware and was there any noticeable differences?Thanks.

author: Fungus
author_rank: Super Contributor
timestamp: April 28, 2020, 05:51:02 am
content: Download the firmware and there should be a release notes .txt with a list of things that changed.But... you know you're going to.

author: dave j
author_rank: Regular Contributor
timestamp: April 28, 2020, 12:16:55 pm
content: If it gives you any confidence, I upgraded a DS1102E, hardware version 58 and firmware 00.03.01, to the 00.04.02.01.00 version about a year ago and the process went smoothly.I'd noticed that the screen capture to USB didn't work on the earlier version. As it was a recently acquired first scope I hadn't really used enough of its features to notice any other changes.

author: marcus h
author_rank: Contributor
timestamp: April 28, 2020, 03:58:35 pm
content: Quote from: Fungus on April 28, 2020, 05:51:02 amThe release notes can be downloaded separately.For this model it's the first in the list:https://www.rigolna.com/firmware/Personally, I don't think that most items in the notes are super-essential but there are some error corrections.

author: theleakydiode
author_rank: Regular Contributor
timestamp: April 29, 2020, 03:46:52 am
content: Update: The upgrade went fine, I went and hid as it was flashing. Haven't seen any noticeable differences yet however.
CMU200, screen glass replacement, TDK FLECLEAR Ag-Stacked Film Sheets - Page 1
Forum section: electronics / testgear

author: alpher
author_rank: Frequent Contributor
timestamp: April 28, 2020, 08:33:43 pm
content: Just broke the glass screen on my CMU200 trying to clean it. Obviously getting the glass itself is not a problem, it's the rf shelding that's an issue. Wonder if anybody tried the TDK FLECLEAR Ag-Stacked Film Sheet, namelyhttps://www.mouser.ca/datasheet/2/400/tdk_09122018_AG-SHEETSAMPLE-4_Datasheet-1479886.pdf?

author: richnormand
author_rank: Unknown
timestamp: April 28, 2020, 09:52:55 pm
content: The has been other posting here about yellow darkening and such but I dont ever recall someone describing if it made any difference operating without it.I am sure it does make a difference (like my HP 3561A dynamic signal analyzer) but under certain conditions and pushing the specs.In regular use (typically as a SA, not testing phones) without the glass do you actually see any ill effects?If so a regular piece of cut plastic or glass might do.Can you power up your unit and find out?You can also get TiO coated glass for LCD displays that is relatively cheap that might work well (grounded to chassis) and still be transparent.Cheers.
Modern replacement for Tek DTG5274 - Page 1
Forum section: electronics / testgear

author: ezalys
author_rank: Frequent Contributor
timestamp: April 28, 2020, 05:11:57 pm
content: Hey all,I'm looking for a precision digital pattern generator that can serve as a modern replacement for the DTG5274 with four DTGM30 modules. That is, digital control of 8 channels at 3.35 Gb/s per channel. It's absolutely crucial that the delays of the edges of the output be deterministic with relation to the trigger pulse.While I could probably hack something together with an FPGA board, I really want a self-contained box (or card) that will provide a plug and play solution. Furthermore, I expect there to be a great deal of subtlety in the trigger synchronization that I'm not comfortable doing myself.Best wishes,Evan
R&S FSP Spectrum Analyzer Win NT HDD Image - Page 1
Forum section: electronics / testgear

author: Cristian2020
author_rank: Newbie
timestamp: April 05, 2020, 11:56:30 pm
content: Hi,I have a R&S FSP13 spectrum analyzer that has the HDD broken.Unfortunately no image of the HDD has been made before this event.The HDD is no recoverable (broken arm with extensive damage of the disks).I have try to get the help from R&S but without any luck.After searching to the forum it seams there is an image available but is for XP and this is not compatible with the current controller that i have (only 64M FRM5 AMD K6) that is only capable of running NT 4.0.Are there any good samaritan willing to share an image of his precious one?.Thank's!Robert

author: wraper
author_rank: Unknown
timestamp: April 06, 2020, 12:14:13 am
content: Did try installing from here?https://www.rohde-schwarz.com/ph/firmware/fsp13/Could be enough to install after you do windows install first. disk1.bin inside the archive is actually a disk image with setup files. EDIT And particulaly V 2.80 SP3 (appears to be main software) is much larger and contains multiple additional .cab archieve files.

author: Cristian2020
author_rank: Newbie
timestamp: April 06, 2020, 06:44:19 am
content: The software from R&S page contains only the Firmware that operates the equipment.Is there for sw upgrades only and will not function as as stand alone (with windows installation done before). This is because the firmware does not contains the drivers necessary to access the boards inside the instrument (the PCI acq. board is not recognized ) .So, i tried this option first, on a VM to take a peek on what the sw does and install also on the real device.Because no driver exist the application will get stuck.This is the reason why i ask about the image because i exhausted all other options!Thank's

author: dagema
author_rank: Contributor
timestamp: April 28, 2020, 02:20:44 pm
content: I am in the same situation with my FMR5 SFP30. Did you find any solution yet?
HP4062UX - Page 1
Forum section: electronics / testgear

author: nonsence
author_rank: Newbie
timestamp: April 28, 2020, 12:02:20 am
content: Hi guys,I was wondering if anyone in the community who works in a fab or lab still uses a HP4062UX (HP4142b + HP4084/5B test head switch matrix)in there daily life.
Philips Pm 5193 programable synthesyser / function generator - Page 1
Forum section: electronics / testgear

author: esprits4s
author_rank: Newbie
timestamp: April 26, 2020, 08:12:57 am
content: So, I'm going through my collection of untested gear and am now looking at this signal generator. So far, I'm getting DC voltages but now much else. So,if anyone has a user manual for this, or any advice, I would be greatful!Thank You!!-Gary

author: Gabriel
author_rank: Regular Contributor
timestamp: April 26, 2020, 08:33:48 am
content: First result for "Phillips PM 5193" in DuckDuckGo bought up this:https://www.manualslib.com/manual/689885/Philips-Pm-5193.htmlIt's the service manual so that might help. Does the display work at all or does it function properly? Also here is the manual:https://www.lost-manuals.com/manufacturer/Philips/PM_5193

author: Electrole
author_rank: Contributor
timestamp: April 26, 2020, 09:31:10 am
content: I have two PM5191, a similar model but with fewer features, and both had issues with the reed relays.There seems to be no direct replacement of these relays so I had to replace a few of them with a model from Pickering and do some wiring. Eventually, I made a small adaptor PCB which allows me to plug in Pickering series 111 or 112, for instance.BR

author: esprits4s
author_rank: Newbie
timestamp: April 27, 2020, 08:34:06 pm
content: Thanks guys. I should have searched.... I had found the service manual earlier, but was looking for the user guide which can be found here:http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Philips. This should keep me busy for a while:)
In Circuit Logic IC Tester - Page 1
Forum section: electronics / testgear

author: ultrasmurf
author_rank: Regular Contributor
timestamp: April 26, 2020, 01:32:19 pm
content: Is there one available within mortal budget ? (Not more than USD5K ?)ATE definitely has some sort of capability to do it if programmed correctly based on what I've read, not that I ever used one, so do let me know if I have been reading science fiction and not science...Saw someone recommending NEAT Mi, but unfortunately the guy at NEAT replied that they discontinued production due to lack of interest...Looks promising from what Ive read. Spec say it does not get affected by other device on board, but the device looks too small to be carrying some sort of driver with backdriving technology that will not fry neighbouring IC. If any of you interested in this, maybe start generating inquiry to the guy inhttp://neatmarine.blogspot.com/2018/11/mi.htmlhopefully enough mortal asking for it for the guy to start production again.Arduino with a driver to do backdriving for logical input pin ? Generate vector test table library and use it to test logic IC in circuit ? Possible ?Anyone can point me to the right direction ?
Transistortester not working - Page 1
Forum section: electronics / testgear

author: panoss
author_rank: Frequent Contributor
timestamp: April 26, 2020, 02:58:52 pm
content: I 've builtthe well known transistor testerbut it 's not working.Withthis firmware(I 'm using an ATMega8).This is what it displays when I have nothing connected on the test points and press the button:And this with a resistor connected (at the test points):As you can see it does not really measure anything.I have checked for cracks on tracks, shorts, cold solderings, anything. But haven't found any fault.Any help is welcome.(I 'm using a 4MHz crystal instead of 8MHz as per the original design. I 've added the frequency in the code)

author: CDaniel
author_rank: Frequent Contributor
timestamp: April 26, 2020, 05:02:13 pm
content: You should try to find an 8MHz quartz and use the original code ...And I don't see how option bits should be set , Atmega8 has CKDIV8 , clock divided by 8 or not

author: panoss
author_rank: Frequent Contributor
timestamp: April 26, 2020, 07:16:00 pm
content: But this is the original code, I just added the frequency:Code:#define F_CPU 4000000UL

author: CDaniel
author_rank: Frequent Contributor
timestamp: April 27, 2020, 12:23:21 am
content: I mean the original hex provided . I don't use that system but after a change the program is recompiled and a different hex should result ... The compiler has to know what timings to change for the new frequency , pretty much everything

author: panoss
author_rank: Frequent Contributor
timestamp: April 27, 2020, 06:34:12 am
content: The result was the same with the original hex file (and other hex files I tried, e.g.this one).

author: panoss
author_rank: Frequent Contributor
timestamp: April 27, 2020, 03:27:18 pm
content: Finally...it was a bad soldering...
RT809F Serial ISP Programmer - VGA ports - Page 1
Forum section: electronics / testgear

author: 2X
author_rank: Frequent Contributor
timestamp: April 26, 2020, 01:54:15 am
content: Hello,I found the "RT809F Serial ISP Programmer" but I can't understand which is the purpose of the ports "VGA IN", "VGA ISP" and "HDMI". On the description I read the below but it is not clear for me at least. Is it possible to program a bios chip on motherboard via VGA?From description:10) Support for Triumph, Leroy, Ding Branch, Rainbow Star, Kang Yue and Wang Jie general driver board. Write the driver board MCU by VGA port without taking the components out of the board. The programmer software has a new additional function, it can restore the chips. If the board has been damaged when programming, it can be work normally with this function. Reduce many matters.11) Support to read and write firmware of LCD display and TV motherboard online and out off line. chipset solution, you can use the official ISP software or third-party software, take into account the functions’s integrity and the user's ease of usehttps://www.ebay.com/itm/RT809F-Serial-ISP-Programmer-with-11-adapters-1-8v-adapter-SOP8-test-clip-EDID/143583488054?hash=item216e3e2836:m:mTo_5ZSSANoLsD7xJ45w4aA

author: shakalnokturn
author_rank: Super Contributor
timestamp: April 26, 2020, 10:48:07 am
content: As clear as translated Chinese...Take my answer with a pinch of salt, I haven't done much research on the subject, I've only read here and there that some LCD TV's (possibly other LCD display devices) allow programming of their mainboards through the VGA or HDMI.I guess that this allows to write the software to flash providing that the CPU's boot code is not corrupt.
In Search Of: LeCroy Waverunner 6zi 7.x Firmware - Page 1
Forum section: electronics / testgear

author: w2hx
author_rank: Contributor
timestamp: April 25, 2020, 06:20:05 pm
content: Hi friends. Any chance someone out there in eevblogland might have a pre 8.0 version of the firmware for the 6Zi series? I have the 610Zi73 Eugene W2HX
SDS1202X-E interfacing with computer. - Page 1
Forum section: electronics / testgear

author: karamba
author_rank: Contributor
timestamp: April 27, 2020, 09:59:56 pm
content: Hello,IthinkI need an oscilloscope for my pet projects. The condition is that I need to be able to transfer all captured data (preferably at real time) to a separate computer and do some processing and visualization there. I haven't used an oscilloscope for a very long time so my knowledge about this stuff is quite a bit rusty. But I did spend my share of time with bulky CRT thingys but those did not know anything about computers.I just picked up an oscilloscope ( not bought it yet) that would not break the bank too much but still I think is quite nice: Siglent SDS1202X-E . Would anyone want to talk me out of it and steer at a better candidate ? Maybe Rigol DS1202Z-E ? My immediate project will require being able to record long sequence of signals ( the longer the better) to a raspberry or PC but saying honestly it is an excuse to buy new shiny toy and look cool when I checking the outlets in my house :-)

author: tautech
author_rank: Super Contributor
timestamp: April 28, 2020, 10:28:58 am
content: Quote from: karamba on April 27, 2020, 09:59:56 pmFirst think about the sampling rate of a DSO, it's in GSa/s and you can't push that much data through to a PC without fast fiber at the very least.Sorry but I've got bad news for you, it won't happen in real time !QuoteIt's good you already have scope experience to know what the basic scope controls do however getting the most from a DSO requires a considerable rethink of scope operation. Become familiar with the strong points of a DSO, namely its Trigger suite, waveform capture and memory depth. How well you use each is fundamental to the end result.QuoteIt will do what you need once you learn its capabilities.QuoteLong records require memory depth and sometimes Roll mode and to start or stop them so knowledge of how to use their most powerful feature, their trigger ! Then you can Save the record in various formats and export it via a USB stick or directly to your PC using EasyScopeX, again via a USB connection or LAN. Remote control of the scope is possible too from within EasyScopeX.QuoteBetter to use a DMM, a transformer to step mains down to safe levels or get a 100:1 probe to ensure scope and you don't get fried !
ISO-TECH / APPA 505 diode test range fault - Page 1
Forum section: electronics / testgear

author: CambridgeMart
author_rank: Regular Contributor
timestamp: April 24, 2020, 04:30:13 pm
content: My ISO-TECH 505 suddenly stopped working on the diode test range, it's now displaying '-----' on the LCD. Checking the open circuit volatge shows roughly 0.1V across the probes and it's very unstable, so could just be a stray voltage reading. Has anyone encountered a similar fault on this range of APPA manufactured meters?
[SOLVED] R&S CMU200 HDD Bracket Mounting Screw Size Identification Request - Page 1
Forum section: electronics / testgear

author: niconiconi
author_rank: Frequent Contributor
timestamp: April 20, 2020, 08:54:17 am
content: Hello everyone. I just received my R&S CMU200 radio communication tester, it's up and running well but there's only a small problem - the HDD bracket didn't come with mounting screws, and I cannot mount the HDD bracket on the equipment. (I meant the two mounting screws used to mount the bracket, not the four mounting screws for the HDD itself). I tried almost all screws I could find from various computer parts, but none of them fits. I checked the service manual's BOM, but it only listed the bracket as a whole as a replacement part, there's no information on the screws. I know I can just glue the HDD on, but I prefer to install it in its original way. I appreciate everyone who owns the equipment and can help measuring/identifying them, thanks.

author: eb4eqa
author_rank: Regular Contributor
timestamp: April 22, 2020, 07:26:53 pm
content: Hi Nico,I had some time today and I took the CMU200 out. The screw has 2.35mm diameter, 0.45mm thread pitch and it is 4mm long. That closely matches a metric M2.5 bolt with standard pitch. See pictures.Roberto EB4EQAwww.rbarrios.com

author: niconiconi
author_rank: Frequent Contributor
timestamp: April 25, 2020, 05:12:44 pm
content: Quote from: eb4eqa on April 22, 2020, 07:26:53 pmThanks! The HDD has been installed back into place
EEVBlog BM235 lcd screen, black spots - Page 1
Forum section: electronics / testgear

author: kosmonooit
author_rank: Contributor
timestamp: March 12, 2020, 08:29:46 pm
content: Hello all,I picked up a used BM235, all good but it has some black artifacts around the edges of the screen with a large blob on the LHS.Its still usable, and no problem reading the numbers, just wondering whether spares are available and if its worth a repair.Cheers from ZA

author: Till Matte
author_rank: Contributor
timestamp: April 24, 2020, 03:46:42 am
content: It should be liquid crystal leaking problem for the lcd, that is the sealing of lcd has been damaged, it can not be recovered any more, and can not be repaired, only if replace it by a newlcd.
JBC T245-A Soldering tip for SMD (down to 0402) - Page 1
Forum section: electronics / testgear

author: TrickyNekro
author_rank: Frequent Contributor
timestamp: March 27, 2020, 09:20:00 pm
content: Hi!So I recently have gone the extra mile and bought myself a worthy soldering iron!But a worthy soldering iron needs also a worthy tip!I got myself some tips but they are better for heavy stuff, I expected something smaller, could not judge from the datasheet correctly.So what would you use for SMD work, rework? I usually don´t go under 0402 in packages and 0.4mm pitch and I have bigger tips to handle bigger stuff.I looking for something in the "Louis Rossmann" micro-pencil category, but I could be wrong so I would like some suggestions before I go out and spend 100€ on tips :-PThanks!

author: VanBudd
author_rank: Contributor
timestamp: April 23, 2020, 08:44:26 am
content: Bevor i got the c210 handle i used C245-731 tip down to 0201 with no problem, for 0402 is normaly use C245-906.But if you want a smaller handle you normaly can use the C210 handle on the same station like C245.I absolutely love the C210, the tips i use on this are C210-008, C210-021 and for realy small things C210-009.For ICs i would take a bevel or spoon tip.

author: Noy
author_rank: Frequent Contributor
timestamp: April 23, 2020, 11:15:21 am
content: I haven't got a T210 handle but i use : Sometimes the Spoons (C245-965 or C245-938) or C245-030 or C245-937 beside the normal 906 / 907/ 908 it depends on what you want to solder.For example if it is really small but on a 10layer board i will use C245-937 because it is better than C245-030 which can't get enough heat into the pad.
Agilent U1272A Demo Unit - Page 1
Forum section: electronics / testgear

author: CygnusX1
author_rank: Newbie
timestamp: April 23, 2020, 01:46:43 pm
content: Greatings everyone,Long time creeper, on and off since was in college I think, and I have learned quite a bit over the years from here, especially when it comes to the equipment I want to acquire for my home lab.I'm currently looking for a new DMM and I saw an Agilent U1272A on the Keysight ebay store so I decided to make an offer. It wasn't until after I made the offer that I found out that these meters have a pretty bad flaw when it comes to measuring DC current in a noisy environment. The serial number falls within the ones mentioned on the service note (U1272A-07A).Should I be worried about this meter having this flaw or would it be safe to assume it has been fixed?Thanks in advance

author: AVGresponding
author_rank: Super Contributor
timestamp: April 23, 2020, 01:50:00 pm
content: If it's from the official Keysight ebay store I'd expect any remedial work to have been carried out.EDIT: The only thing that would put me off is the fact it's an OLED display...

author: CygnusX1
author_rank: Newbie
timestamp: April 23, 2020, 02:09:36 pm
content: You're probably right. I contacted them through ebay, and they said if it wasn't fixed it would be covered so no worries regarding that I guess.You might be thinking about the u1273a regarding the OLED screen, the u1272a has a LCD thankfully.
Tektronix (TDS5054B) - Error message GPIB  - Page 1
Forum section: electronics / testgear

author: mawrick
author_rank: Newbie
timestamp: April 22, 2020, 04:43:20 pm
content: Anyone have any idea what might be the cause of a error on this scope - related to GBIP.Something that's "fixable" or is it a major fault ?.attached images of error messages"Can not find GPIB hardware" after it have booted up

author: daveyk
author_rank: Frequent Contributor
timestamp: April 22, 2020, 11:29:56 pm
content: Yea, that's a tough one. I doubt there is a lot of people with experience with this scope. I recently bought two of the NAVY/MARINE ones and am kind of sorry I did. There are much more of an Engineer's scope than a Tech's scope. I feel they are difficult to operate. I have adapted a utility program to use it instead of my TDS3000 series scopes.Now to get to your problem. I have no experience with repairing a GPIB problem, but my guess is you are going to have to tear it apart. Getting in to the guts is NOT NEARLY AS EASY as the service documents show. There is a learning curve and a lot of cursing to get that right (as you face the front of the scope) hand panel and top panel off. The panel to take off is the one with DVD drive. Once you can get inside the scope (let me know how much you cursed doing so), then you could look for items that may need re-seated.I have one of mine apart right now to that stage to add a SSD drive to it. I think I will give up on removing the old IDE drive - too hard. I will probably velcro the 500GB Samsung SSD to the panel where the DVD drive mounts. Anyhow, looking in to it, the GPIB connector has a cable that plugs in to the main board that is plugged in to the computer mother board. If the GPIB part of the board is bad, you are going to be shit out luck.What you may want to try is trying to re-install the Tektronix drivers. Where can we get those? I found one source on the WEB, but the disks are not in ISO format but a DD format that requires a Linux computer to burn the CD copies. I see there is driver and restore disks on EBAY for $100 a set. The seller has about ten sets. I think I will order a set to have in archive.Lets talk about these scopes. I think they could be very a very powerful tool, but probably not for productive service as I wanted them for. And the fricken things are HUGE and HEAVY.If anyone can kindly provide ISO copies of the restore CDs for a TEK 5054 Scope, please do so and reply to this thread.Thanks kindly,Dave
KP184 dc load - Page 1
Forum section: electronics / testgear

author: Commander_Spock
author_rank: Contributor
timestamp: September 02, 2019, 08:08:25 pm
content: i am looking at buying a cheap programmable dc load. for now i think that the KP184 fit my requirements. i prefer KP184 instead of KP182 because of the serial port allowing to get data in/out. Some vendors on ebay propose the KP184 software as a free gift. When you contact them they explain they have to speak to the suppliers and after few days when you ask them again explain that the supplier did not replied to them.I post here to know if anybody use this dc load and if they ever saw any software that use the serial port ? why buy a KP184 with no way to use the rs232 port (as there is no software to use it) when a KP182 withtout rs232 port is cheaper ? any idea if the software exist and where to find it ?Anybody tried to connect the KP184 to labview ? to mathlab ?

author: interflexo
author_rank: Regular Contributor
timestamp: April 21, 2020, 06:44:23 pm
content: The KP182 is a 20A 200W electronic load no RS232 port. KP184 is a 40A 400W electronic load with RS232 / RS485 ports.A link to the software can be found here in the VoltLog Teardown video description:Only the link to the 2Mb Light National Instruments based PC software is available. The software is full of Chinese chars and crashes easy.I am thinking of using Python to build a simple usable GUI for the common applications and export .csv data.

author: HKJ
author_rank: Super Contributor
timestamp: April 21, 2020, 06:50:40 pm
content: Quote from: interflexo on April 21, 2020, 06:44:23 pmIf it uses SCPI it is probably easy to include it in TestController:https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/

author: interflexo
author_rank: Regular Contributor
timestamp: April 22, 2020, 09:42:34 am
content: It uses a binary format MODBUS-RTU protocol with CRC checks.

author: HKJ
author_rank: Super Contributor
timestamp: April 22, 2020, 10:27:58 am
content: Quote from: interflexo on April 22, 2020, 09:42:34 amI will be supporting MODBUS, but I do not know it users will be able to define a device.
Philips PM 3585 Disassemblers - Page 1
Forum section: electronics / testgear

author: Toyguy
author_rank: Newbie
timestamp: December 23, 2016, 12:46:48 am
content: Wondering if anyone might know of a source for the 68xx disassembler software for my PM 3585 logic analyzer? It came with the system and utility discs and also the 68xx and 68000 target adapters but not the associated disassembler discs. I've done a fair amount of internet poking about with no luck so far, hoping someone might have stashed a copy.Feel free to reply in thread or PM as you prefer. Thanks!Dave

author: tautech
author_rank: Super Contributor
timestamp: December 23, 2016, 12:51:24 am
content: Welcome to the forum.Without going on a wild goose chase (haven't got time sorry) try some of the manual repositories linked in this thread:https://www.eevblog.com/forum/repair/repair-documents-and-links-sticky-me-please-mods/Some hold all manner of software and ROM images so you might get lucky.Good luck.

author: Toyguy
author_rank: Newbie
timestamp: December 23, 2016, 07:03:22 am
content: No software I could locate but a good collection of manuals for other stuff I may end up with :-)Still looking...

author: JimBeam
author_rank: Contributor
timestamp: April 17, 2018, 09:24:25 am
content: @Toyguy: 1.5 years later, did you locate anything of value regarding disassemblers?It also seems a "custom disassembler kit" has existed.andreas

author: Raymond
author_rank: Newbie
timestamp: April 22, 2020, 08:58:11 pm
content: 2 years later..I have the original disk pm me I can send a copy..If some need it. Finally the death end of this thread solved
Heathkit IN-3147 Capacitor Substitution Box, model derivation and measurement - Page 1
Forum section: electronics / testgear

author: graybeard
author_rank: Frequent Contributor
timestamp: April 22, 2020, 08:27:17 am
content: I show the internal construction of a Heathkit IN-3147 Capacitor Substitution Box. Measure the complex impedance from 100 Hz to 10 MHz and derive a circuit model. I then measure the box with multiple multimeters, a DE-500 LCR meter, and a ZM-11/U LCR bridge and compare the and discuss all of the results.Here is a copy of the slides
Scope Probe to BNC Adaptor Part Number??? See picture - Page 1
Forum section: electronics / testgear

author: daveyk
author_rank: Frequent Contributor
timestamp: April 20, 2020, 08:52:14 pm
content: Does anyone know the part number for this Scope Probe to BNC Adaptor? I am 90% sure it is Tektronix and the best I've ever had and want more. Hopefully the attachment is viewable.Thanks kindly.Dave

author: David Hess
author_rank: Super Contributor
timestamp: April 21, 2020, 02:36:26 pm
content: Pages 456 and 457 of the 1975 Tektronix catalog show four different BNC to probe tip adapters depending on the probe:http://w140.com/tekwiki/wiki/Tektronix_Catalogshttp://bitsavers.trailing-edge.com/pdf/tektronix/catalog/Tektronix_Catalog_1975.pdf

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: April 22, 2020, 01:19:06 am
content: With which probes are you using it? From the looks, it is not for the common 5mm modular. Generally, I found those adaptors which have a jack contact for the probe tip and a proper BNC plug contact far better than those which are only a ground sleeve. But it does not look lige a Tek part to me.
R&S CMT-54 / CMT-55 Option CM-B4 GPIB Interface? - Page 1
Forum section: electronics / testgear

author: SpecAI
author_rank: Newbie
timestamp: April 20, 2020, 06:14:35 pm
content: Hello all and greetings!I recently bought a R&S CMT-55 radiocommunication testkit, which unfortunately does not have the GPIB interface option fitted.This website has a good description and some remote control software:http://www.30dbm.com/CMT/CMT_Remote.aspxQuestion to the esteemed international community now, as I could not find a CM-B4 option on its own anywhere...Do you know who might have a CM-B4 option card somewhere available or a business which might be happy to part with one for little money?Many thanks and kind regards,JackPS: I have no affiliation to the above mentioned website
DP832a tracking issue? - Page 1
Forum section: electronics / testgear

author: cpposteve
author_rank: Regular Contributor
timestamp: April 21, 2020, 03:10:36 pm
content: hi all.curious one, i am trying to get 42v out of my psu to charge a 10s li-ion pack, set both at 21v each at 2amps. turned tracking on for both of them, and channel one is in cc mode yet ch2 is in cv mode.any way i can get them to both output the same voltages and stay in cc mode untill the voltage has risen too 42v then both channels fall into cv mode?cheers

author: maginnovision
author_rank: Super Contributor
timestamp: April 21, 2020, 03:42:15 pm
content: You need to put the 2 channels in series. Just set them both to 21V, tie ch1 - to ch2 + and use ch1+ and ch2 - as your connections. This battery has builtin protection?

author: cpposteve
author_rank: Regular Contributor
timestamp: April 21, 2020, 03:43:54 pm
content: hi maginnovisionthats what ive done and is charging fine, my issue is the voltage of each output when under load does not match.steve

author: maginnovision
author_rank: Super Contributor
timestamp: April 21, 2020, 03:56:49 pm
content: That's not really an issue. As your current drawn comes under the limit the voltage on ch1 will come up. At any given time you'll still get xx volts even if it looks odd with 1 channel at max and the other down.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: April 21, 2020, 11:38:32 pm
content: Wow, that's weird. I would have asked the same question.
[AU] AUCTION: Interesting TE (R&S HP etc) - Page 1
Forum section: electronics / testgear

author: SL4P
author_rank: Super Contributor
timestamp: April 21, 2020, 07:45:30 am
content: Here's something to fill your eveningsLocated in Canberra - they will ship...https://www.allbids.com.au/c/office-business/pro-audio-video?utm_medium=email&utm_campaign=2020-04-21%20Vintage%20Electrical%20Sale&utm_content=2020-04-21%20Vintage%20Electrical%20Sale+CID_41238356ca3e76a3568a3db2a9b8088c&utm_source=Email%20Marketing&utm_term=GO%20EXPLORE#?page=1&count=50
uCurrent not working on uA - Page 1
Forum section: electronics / testgear

author: robomaniac
author_rank: Newbie
timestamp: April 10, 2020, 12:33:23 am
content: Hi guys,I have gen 1 uCurrent. Batterie is now at 2.951V (I was 3.12V, I just forgot it ON this evening) I set switch to mA and I do measure the proper mA. I can easily compare it with my Fluke multimeter and I get same reading. I can only go down to 1mA with my fluke.the project I am working on is nA.So I set my switch to nA and it's only show 1.542V, I plug and remove LEDs and nothing change, I still read 1.542VI unplug the same components when testing in mA.Now I remember the last time I used this (years ago) and that 1.5V does bring back memories.I had a deadline for a digikey order so I quickly ordered u1 and u2. That did not solve the problem.now I took the time to check the schematic.I measure resistance of thecurrent inputand I measuremA = 0.3 OhmuA = 10.4 OhmnA = 9.99k OhmMy fluke wire measure 0.2 OhmR1 = 0.2 OhmR2 = 10.00K OhmR8 = 10.5 OhmR6 = 99.9k OhmR7 = 99.7k OhmR3 = 75.1k OhmR11 =23.97k OhmI initially thought the Switch (SW1) was broken or something. I did not use this product a lot. But the fact that thecurrent inputchanges when I change the switch.Kean mention to check virtual groundhttps://www.eevblog.com/forum/testgear/ucurrent-blown-by-overcurrent/msg1776830/#msg1776830>>Also check the virtual ground (negative output jack) is at 1.5V with respect to the battery negative terminal (half battery voltage).1.435VI am looking for suggestion, next time I will order the entire BOMthanks

author: robomaniac
author_rank: Newbie
timestamp: April 15, 2020, 02:06:14 pm
content: I will order and replace all the components. Also the switches because that is the only mechanical components of the kit.

author: Kean
author_rank: Unknown
timestamp: April 16, 2020, 05:19:27 pm
content: Sounds like a problem with SW1 based on your measurements.Or you are just overloading it in nA mode, as a 1.5V output is effectively max range. Or do you get that in the nA range even with nothing connected at the input?

author: robomaniac
author_rank: Newbie
timestamp: April 20, 2020, 02:05:00 pm
content: Quote from: Kean on April 16, 2020, 05:19:27 pmright not I have a 5mA load and get 1.5VQuote from: Kean on April 16, 2020, 05:19:27 pmno I read 0Vbtw, I change all the components on the PCB (except voltage monitor components) still have same issue. So I am lost.is the max 1000µA? then that might explain some stuff. That's 1mA

author: Kean
author_rank: Unknown
timestamp: April 20, 2020, 02:46:03 pm
content: Yeah, the full scale specs are +/-1250 mA/uA/nA depending on the range - i.e 1.25A, 1.25mA, 1.25uA.From memory that is allowing for the 3V battery to drop by 10% or so - you can get a bit more with a brand new battery.Or you can use a different battery config, e.g. 3xAA to get a bigger range - just don't exceed the specs of the opamps.
Source for GW-Instek GOS-6101 Service / User Manual - Page 1
Forum section: electronics / testgear

author: MannyTC
author_rank: Newbie
timestamp: September 29, 2017, 05:46:44 am
content: Hi, does anyone have any leads on where I can find the service and/or user manual for a GWInstek GOS-6101? Been looking for a while but have struck out.

author: MannyTC
author_rank: Newbie
timestamp: October 04, 2017, 05:42:47 am
content: Does anyone have any ideas on other sources? I contacted the manufacturer but they didn't even seem to want to entertain looking in their archives for me.

author: sprintcarfan
author_rank: Contributor
timestamp: October 04, 2017, 06:40:19 pm
content: I assume you've seen this auction?http://www.ebay.com/itm/Instruction-manual-with-Schematics-for-GW-GOM-801G-GOOD-WILL-/282158074826About halfway down in the description they list a schematic for the 6101, but they might also have the service manual.

author: MannyTC
author_rank: Newbie
timestamp: October 05, 2017, 05:43:50 am
content: Quote from: sprintcarfan on October 04, 2017, 06:40:19 pmThanks, I had not seen that. Don't know how I missed it with all the searching I have been doing. I sent a message to the seller to see what they have available.

author: Bjoern
author_rank: Contributor
timestamp: April 22, 2020, 05:22:36 am
content: Hi Manny, Did you manage to find the service manual for the GOS-6191 scope ?I also have a problem with it, all the keypad LEDs are blinking the the beam does what it wants.Would you mind sharing if you have advice or schematic ?bg@bgcontrol.com
Does anyone have a manual or any experience with using a Nicolet Model 42? - Page 1
Forum section: electronics / testgear

author: Dom87
author_rank: Contributor
timestamp: April 19, 2020, 06:28:56 pm
content: A bit of a stab in the dark, but here goes.Does anyone have any experience with using a Nicolet Model-42 4-MHz Programmable Function Generator? Built circa 1986.I'm trying to work out some of the commands for it but some of the features have me stumped. Finding a manual for one of these is proving impossible so far.I have included a picture of what it looks like.Thanks!
Delete, sorry - Page 1
Forum section: electronics / testgear

author: Mp3
author_rank: Frequent Contributor
timestamp: April 20, 2020, 10:16:42 am
content: Delete, sorry

author: Electro Detective
author_rank: Super Contributor
timestamp: April 20, 2020, 10:35:23 am
content: Some pictures of the troublesome circuit please

author: Mp3
author_rank: Frequent Contributor
timestamp: April 20, 2020, 10:41:17 am
content: Quote from: Electro Detective on April 20, 2020, 10:35:23 amSorry, i found a thread about my problem and just replied to it there.https://www.eevblog.com/forum/testgear/diy-calibrating-a-hp-3478a/msg3024868/#new

author: Electro Detective
author_rank: Super Contributor
timestamp: April 20, 2020, 10:53:11 am
content: Take the sorry back mate, I was just having a giggleand yes I found the post, good luck
Leader LBO-325 oscilloscope:  How to disassemble? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: April 19, 2020, 12:57:52 pm
content: Anyone here taken one of these apart? I've got dirty controls that need cleaning and this tiny thing is quite the mechanical puzzle. Before I take out every damn screw I thought I'd ask if there was a better wayThanks!
MOVED: HP 8594E Replacing the green CRT with LCD - Page 1
Forum section: electronics / testgear

author: Miti
author_rank: Super Contributor
timestamp: April 18, 2020, 10:53:42 pm
content: This topic has been moved toProjects, Designs, and Technical Stuff.https://www.eevblog.com/forum/index.php?topic=116809.0
Test Leads for Agilent 34401A - Page 1
Forum section: electronics / testgear

author: Picuino
author_rank: Super Contributor
timestamp: April 18, 2020, 09:45:44 am
content: Hi All.I have a multimeter Agilent 34401A of second hand, with a normal test leads, from a cheaper multimeter.I see that cheap test leads add a little error in the millivolt range so, I want to buy a good ones.any buying advice?

author: Picuino
author_rank: Super Contributor
timestamp: April 18, 2020, 09:51:39 am
content: Joining both probes I read 1.6mV

author: Meltdown2011
author_rank: Newbie
timestamp: April 18, 2020, 10:53:11 am
content: It seems that your multimeter is in spec... It is a matter of accuracy rather than your probes.34401A Accuracy Specification +/-(% of reading + % of range)100.0000mV DC: 0.0050+0.0035 (1Year 23+/-5 deg.C)Therefore, 0V input -> +/-(0mV*0.0050% + 100mV*0.0035%) ->+/-0.0035mV

author: Picuino
author_rank: Super Contributor
timestamp: April 18, 2020, 11:16:34 am
content: I have read wrong, changing comma with dot.Ok, Thank you.

author: jchw4
author_rank: Regular Contributor
timestamp: April 19, 2020, 08:45:12 am
content: 34401A zero also depends on NPLC:https://www.eevblog.com/forum/metrology/dmm-adc-noise-comparison-testing-project/msg2977864/#msg2977864(and probably on the range too).Official leads are 34138A.I believe these were marked obsolete for some time (?), and Keysight suggested another one without grabbers (were they out of grabbers?), but they seem to be backhttps://www.keysight.com/en/pd-826347-pn-34138A.
Rigol DG1022 Trig out question - Page 1
Forum section: electronics / testgear

author: jord4231
author_rank: Regular Contributor
timestamp: April 18, 2020, 12:01:18 am
content: Hi all,Just a quick one, Its not clear to me in the manual, but anyone who has used one or has one may know.If I set up a frequency sweep what does the trigger out look like. Does the trigger out give me a square wave that follows the frequency or does it give me a trigger at the start of each sweep.EG: does the sync out remain high for an entire sweep cycle.Thank you

author: egonotto
author_rank: Super Contributor
timestamp: April 18, 2020, 03:38:51 pm
content: Hello,enclosed three picture.DG1022_sync.jpg: syncDG1022_trig_u.jpg: trigger upDG1022_trig_d.jpg: trigger downBest regardsegonotto

author: jord4231
author_rank: Regular Contributor
timestamp: April 18, 2020, 10:39:35 pm
content: Thank you very much Egonottomuch appreciated!Jordan