hybridfree/eevblog-posts huggingface dataset:
HP 859xE preset softkey numbers - Page 1
Forum section: electronics / testgear

author: Ron Curry
author_rank: Contributor
timestamp: June 09, 2017, 06:40:41 pm
content: Searched high and low for this.... Anyone know of a document that lists the softkey numbers for 859xE SA preset soft keys. I'm looking for the number for "Track Gen". Or, perhaps there is a function that will return the code for the key that is pressed? Any clues appreciated.Thx,Ron

author: Tony_G
author_rank: Super Contributor
timestamp: June 09, 2017, 08:09:30 pm
content: Sorry for not understanding but aren't the softkeys the 6 to the right of the CRT? They should just be numbers 1-6 starting from the top I think.Or are you after what specific command is associated with a specific softkey?I had an 8591E but not tracking gen so I'm not familiar with the TG commands.TonyG

author: Ron Curry
author_rank: Contributor
timestamp: June 11, 2017, 01:22:52 am
content: Perhaps I'm misunderstanding how it works so let me explain what I want to do.... I want to assign a different function to an existing command that's predefined. In this case the "Tracking Gen" command under the AUX CTRL menu. It's my understanding that every such command has an integer assigned to it which is used to reference programmatically.Thanks,Ron

author: Tony_G
author_rank: Super Contributor
timestamp: June 11, 2017, 01:53:14 am
content: Hmm - I know you can create menus under the Meas/User button but I don't think you can take an existing menu item on any arbitrary menu and replace it. At least I've never heard of this being done nor have I seen a programming example showing it.Clicking notify on this thread in case you can actually do this.Sorry I couldn't be more helpful.TonyG

author: Ron Curry
author_rank: Contributor
timestamp: June 15, 2017, 04:26:22 am
content: Ok, figured this out. You CAN redefine preset softkey. The challenge is you must find the menu number of the preset softkey you wish to define because they don't seem to be documented in any of the readily available docs. In this case the AUX CTL menu is #52 (which I'll explain how I found later). to redefine a specific softkey in that menu the formula is menu# -1 * 6 + softkey# . In this case it's 52 -1 * 6 +2 = 308 and then use the KEYDEF command with that key number.Cheers,Ron
ATTEN ADS 1102CA partially bricked - Page 1
Forum section: electronics / testgear

author: bbt95762
author_rank: Contributor
timestamp: June 13, 2017, 12:50:50 pm
content: I have an old ATTEN ADS 1102CA+, never had much luck with the triggers, so shelved it, then read on this forum how to update. I did the update, however, now I've lost the menus (see pictures). I downloaded the files from Siglent site. However, the actual ADS in the CNL Zip was a CML...ADS (not sure if that matters, the FW may detect the memory size), The scope seems to work fine, just the menus are blind. Also, the zip files on the siglent site do not include the .CFG files - so I was not able to update that. any help appreciated.photos attached.Thanks,Brian.

author: bbt95762
author_rank: Contributor
timestamp: June 14, 2017, 01:44:53 am
content: Can anyone send me local copies of the ATTEN ADS 1102CAL+ firmware and config?I'd like to tryThanks,Brian.

author: tautech
author_rank: Super Contributor
timestamp: June 14, 2017, 02:09:45 am
content: Quote from: bbt95762 on June 14, 2017, 01:44:53 amOh dear.You've put C*L FW that's meant for a scope with 7" display into a 5" display model.So the Menu will be off the display to the right.That could be problematic as you need access to the menu to select the FW update mode.So forget about wanting CAL FW, you need CA FW for 5" models.No sorry I haven't got the FW you need and Siglent websites don't have it either for 5" models.BTW, Config files are within the .rar FW packages.............sometimes, but they'll be only applicable to the correct model. They're only added into the FW update package when required.

author: bbt95762
author_rank: Contributor
timestamp: June 14, 2017, 02:25:27 am
content: thank you, and that makes so much sense. the RAR for the CNL now includes only the CML fileSDS1000CNL_SSP_V100R005B01D02P32,contained only: SDS1000CML_SSP_V100R005B01D02P32.ADSand this is from the SDS 1102CNL FW pageanyway, hoping someone has a 5" FW update I can use - thanks for the pointer!

author: bbt95762
author_rank: Contributor
timestamp: June 14, 2017, 08:01:24 pm
content: for the CA (not CAL) does anyone know if the RIGOL files will work on the ATTEN? looks like they use a .RGL extension, vs. .ADSThanks,Brian.

author: tautech
author_rank: Super Contributor
timestamp: June 15, 2017, 06:01:17 am
content: Quote from: bbt95762 on June 14, 2017, 08:01:24 pmNo that would be a bad idea.Another look in my archives finds a CM version of firmware but it's too big to attach here so you need to PM me with your email.CM (2 Mpts) and CN (40 Kpts) share the same FW so we might have what you need after all.Let's hope you can access the menu in some way.
Looking for - Hantek HT8100  differential probe opinions - Page 1
Forum section: electronics / testgear

author: MiroS
author_rank: Regular Contributor
timestamp: May 20, 2017, 08:53:57 pm
content: Is this differential probe HT8100 of Hantek - declared to be 100MHz - worth of its price of 200 USD ?

author: mkee
author_rank: Newbie
timestamp: May 22, 2017, 02:39:15 pm
content: Post edited due to an error on my part. Disregard the post but left up to prevent others from making the same silly mistake.I took the chance and ordered one. Unfortunately I initially thought it's going right back. Something seemed very wrong. Appearing way out of spec and resulting measurements that seemed significantly incorrect. Eg. expected ~120V AC yields 170 at 1/500 sensitivity. I was mistakenly reading Peak and not RMS.

author: bitseeker
author_rank: Super Contributor
timestamp: May 23, 2017, 12:37:45 am
content: mkee, are you seeing 170V peak on 120VAC from the power line? If so, it's working correctly. 120VAC is RMS. 120 * sqrt(2) = 169.71

author: mkee
author_rank: Newbie
timestamp: May 23, 2017, 03:04:13 am
content: wow...thanks for not letting me get away with that bitseeker! Jeez. How embarrassing. I just broke it out after having had some time with it tonight after receiving it and realized, yes, that familiar 170V number was me being to hasty with a quick initial read in peakIt should have been more familiar the first time around, but realized the error in my post when I didn't see that number again. Apologies for the freakout and sorry I couldn't get back here in time to correct it before anyone noticedOther lower voltage offsets seem pretty on par with others and nothing major to worry about...especially given the range this is primarily designed for.

author: bitseeker
author_rank: Super Contributor
timestamp: May 23, 2017, 03:46:52 am
content: No worries. It happens sometimes.

author: PP7BB
author_rank: Contributor
timestamp: June 14, 2017, 04:53:11 pm
content: Boys - especially mkee the owner of HT8100 - do You recommend them to us?I am looking for cheap differential probes to measure things on mains potential. The choice in Poland is Pintek and hantek. Hantek is cheap, Pintek is more expensive - about 1.5 times and I dont know why is that.What bothers me is that I don't see sensitivity in Hantek datasheet, Pintek's datasheet shows this value.Coud You write something about these probes?
BK 1902: Need schematic - Page 1
Forum section: electronics / testgear

author: Relaxe
author_rank: Regular Contributor
timestamp: June 08, 2017, 07:48:58 pm
content: Hello,Due to a terrible drilling mishap, I broke my BK Precision 1902 power supply.I'm looking to simply replace the broken diode, ZD2, but I have no idea of it's part number and type. It could be Zener, not sure.Is anybody here capable of finding the schematics?I asked BK on their websitesupport form, and got no reply (how rude).Thanks!

author: Relaxe
author_rank: Regular Contributor
timestamp: June 09, 2017, 03:24:38 pm
content: Well, Lucky me:Schematic for the 1900, 1901, and 1902.Notice it's the non-B versions.

author: technogeeky
author_rank: Frequent Contributor
timestamp: June 09, 2017, 04:41:59 pm
content: Terrible drilling mishap.Do tell.

author: Relaxe
author_rank: Regular Contributor
timestamp: June 13, 2017, 03:27:29 pm
content: Well,This model doesn't have an "output disconnect" button, but there are contacts on the back to provide the functionality.I decided to add the button on the front, drilling a hole for it to go.Since the power supply is to long to fit nicely into the press drill, I used the hand one. When the hole pierced trough, the bit went to far, ripping apart a couple of components.I was precautious enough to tape a towel inside to prevent metal flakes from flying everywhere, but I forgot THAT possibility.I could have placed a metal plate behind the hole to prevent it, but only hindsight is always 20/20.
Anritsu BTS/Sitemaster RS232 problem - Page 1
Forum section: electronics / testgear

author: slurry
author_rank: Regular Contributor
timestamp: June 12, 2017, 08:49:02 pm
content: I have a BTS-master which wont connect over RS232 to the Anritsu LST-software,it's rather annoying because it's one of my most used instrument.Is there any odd way to connect that is not mentioned in the manual? -a factory reset makes no difference.RS232 pin 2/3 is not shorted to ground or loaded in any way-any ideas?

author: coromonadalix
author_rank: Super Contributor
timestamp: June 13, 2017, 04:21:25 am
content: humDoes it require null modem cable ? or an other type of cable dtr dts pins shorted or a combination, twisted rx / tx pins ... maybe your ic's are fine, and you dont have the proper cable, or the cable is damagedif you say its ok on other instruments, maybe there is a bit of info missingYou could use an rs232 terminal software, short the rs232 pins on your 232 ic (the output pins who go to the buffer chip / cpu etc ...) and echo the commands like sending anything / characters etc ... if the chip is ok the commands / characters will be echoed back to the computer ... see that as a loopback test ??I had a problem similar, the rs232 lines where not pulled right, the dtr line was used as a reset line, since it wasn't at the good logic level, i had reset problems on my interface boardIt resetted fine after unplugging the cableI did manage to find from polland a nice usb to rs232 isolated adapter with all the rs232 lines with status leds, if i have an rs232 line pulled wrong for a project, i see their status before programming ... model UR232ISO from sibit.pl
New Function Generator - Page 1
Forum section: electronics / testgear

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 12, 2017, 04:48:46 pm
content: Hello at all!I am going to buy a new waveform generator, I have notice a Rigol 1022U for 230€ include shipping costs, is new and full functional, and in my country, so 3 working days to receive it, and payament via paypal, it can be a good deal? Or I can take a better fg for this price?Thanks at all

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 12, 2017, 05:05:37 pm
content: Need Arb function

author: colorado.rob
author_rank: Frequent Contributor
timestamp: June 12, 2017, 05:06:52 pm
content: That looks like a great deal for a new DG1022U. Will it meet your needs?

author: NiaDebesis
author_rank: Frequent Contributor
timestamp: June 12, 2017, 05:41:42 pm
content: Quote from: colorado.rob on June 12, 2017, 05:06:52 pmThe function and the range of Mhz is perfect, but is a good function generator? Most of the posts aboit it are from the 2010 /2013
Testing multiple output IPSU with dummy load - Page 1
Forum section: electronics / testgear

author: Gabiruman
author_rank: Newbie
timestamp: June 12, 2017, 04:56:36 pm
content: Hi everyone!I'm currently working on a new project that consists in developing a dummy load to test a multiple output IPSU, it has 9 rails and their voltage ranges from 1.25V to 5V, the output current should be less than 1A, but for testing purposes let's consider 1.5A.The idea is to have an active load controlled by a microcontroller that can perform tests to all the rails regarding overvoltage and overcurrent situations and print the results on a PC screen.I'm having a hard time with the first steps of this project, my knowledge in Power Electronics is not that great so I'm trying to understand how things work and what do I need to do.I found this programmable electronic loadhttp://home.fnal.gov/~huffman/activeload/dtl2a-lc.pdfbut it might an overkill either in power or cost, so I've been researching some related projects on the internet and I found one based on Dave's dummy load board video that also used a microcontroller (http://www.instructables.com/id/Arduino-Programmable-Constant-Current-Power-Resist/).It seems to be similar with what I'm trying to do, however I don't need half the stuff present in this design, namely the cooling fan and the temperature sensors because my application is much lower power.However there are several doubts that come to mind...How can I test all 9 rails at the same time?How do I know which load to use for each rail and what output current they have?Note that I didn't design this IPSU, I've just been making some tests with it mostly in software simulation to check efficiency and threshold values.Also I have a passive dummy load that was given to me to make some consumption tests, it has loads for all the rails but it's built in a way I really don't understand.Unfortunally I'm unable to upload the schematics for the IPSU because the file's too big but I'll upload an image of the schematic of the passive load.If someone could help me with the first steps of this project I'd be much appreciated.Thanks in advanceGabriel
New Yokogawa Equipment - Page 1
Forum section: electronics / testgear

author: TestAment
author_rank: Newbie
timestamp: June 09, 2017, 10:35:52 am
content: Does anyone know anything about the new Yokogawa product coming out? All I have received off them is this:

author: abraxa
author_rank: Frequent Contributor
timestamp: June 09, 2017, 11:53:23 am
content: Where did you find out about it? Does that source say that it's a product of the TMI branch?

author: TestAment
author_rank: Newbie
timestamp: June 12, 2017, 03:01:56 pm
content: It was on an email sent to me from Yokogawa. Apparently the product launches tomorrow.
GW-Instek GDS-800 Service Manual Wanted - Page 1
Forum section: electronics / testgear

author: msraya
author_rank: Unknown
timestamp: June 12, 2017, 10:21:23 am
content: Hello!Sorry to repeat the post, I think I put it in the wrong place.I have a problem with an Promax OD-581 with vertical chanel accuracy...This Oscilloscope is a clone of GW-Instek GDS-800 series...I Only need service manual in order to run the auto cal function that the instrument have.It uses a BNC in the rear panel to do the AUTOCAL.But Promax in Spain only do calibrate the instruments if I send It to them..So if someone have the Service Manual PDF and send it to me, I will thank You foreverRegardsManuel
Fluke 8600A front panel fused input connector - Page 1
Forum section: electronics / testgear

author: znac049
author_rank: Newbie
timestamp: June 12, 2017, 09:41:05 am
content: Newbie alert - this is my first post - please be gentle with meSo I've tried various searches here and drawn a blank. I have recently purchased a Fluke 8600A from ebay which has a couple of problems: the first, a dead segment in one of the 7 segment displays is easily dealt with now I've traced a replacement part. The other is that the combined 4mm banana socket with built in fuse holder (for the mA current input) is missing. It looks like a Fluke specific part so I'm wondering if anyone has a spare they'd be prepared to part with or knows of anywhere I could get one.I've attached a picture of the front panel so you can see the hole where the fuse goes - it looks like a simple bayonet arrangement. The stock picture of the back of the panel shows how it should look with the fuse fitted.Thanks for reading!-Bob
Looking for schematic R&S 339.0010.02 and 339.0010.03 2,5GHz generators - Page 1
Forum section: electronics / testgear

author: Kjelt
author_rank: Super Contributor
timestamp: April 30, 2017, 04:12:31 pm
content: Got my self two R&S RF generators a few months back, just checked them out.Both pass the self test, but then the 02 has some PLL instability under 10MHz above 100MHz it is just fine.The 03 gives no output at all, so I want to see if there is something I can do about that, I took a quick look under the hood, it is loaded with pcb'sOne thing is sure, the elco's are those brown types that show signs of EOL so the elco's should be recapped.Actually I don't know what to do with them, I don't have that much spare time at the moment so I can sell them as is both together or I can try to get the 03 to run at least.If anyone has schematics or URL to them, or is interested in these units as they are, give me a PM. They do weigh a ton so preferably in the vicinity of the Netherlands because shipping will also be quite an effort.

author: Kjelt
author_rank: Super Contributor
timestamp: June 12, 2017, 08:55:23 am
content: So are the R&S schematics unobtanium or what ?
DSO screen off-angle contrast - Page 1
Forum section: electronics / testgear

author: Circlotron
author_rank: Super Contributor
timestamp: June 16, 2017, 12:41:29 am
content: My Rigol scope screen looks fine when looking from slightly above. On-axis it looks not bad. If I put on a shelf above the bench just above eye level the screen contrast and visibility is nowhere near as good. I know some simpler LCD displays have some kind of contrast adjustment that you could alter to suit the viewing angle. I wish someone would do a hack to a Rigol scope to achieve the same thing.

author: Nusa
author_rank: Super Contributor
timestamp: June 16, 2017, 01:17:43 am
content: The simplest hack is to create a secured bracket to hold the unit tilted at the required angle for good viewing. Would probably make the controls more accessible as well.
Tek 547 and 575 weekend haul - Page 1
Forum section: electronics / testgear

author: willb
author_rank: Regular Contributor
timestamp: April 18, 2016, 02:35:00 pm
content: A few weeks ago I scored some vintage HP test equipment. This past weekend was Tektronix. A 575 curve tracer and 547 oscilloscope, both with carts! Both needed a lot of cleaning, inside and out. I took all the knobs off, cleaned them with a brush, cleaned every tube individually, cleaned the sockets, cleaned and lubricated the fans, cleaned all the switches and pots, and did some minor adjustments on the 547 for DC balance. The 547 is awesome, I've been wanting a 500 series scope for a long time, but the shipping made them unrealistic for me to buy. This one appears to be sharper than my Tek 2445 and 475A!!! I absolutely love it. I have a few cabinet parts on their way from Austria to complete the units.

author: Cubdriver
author_rank: Unknown
timestamp: April 18, 2016, 08:34:35 pm
content: Nice!-Pat

author: med6753
author_rank: Super Contributor
timestamp: April 19, 2016, 12:38:38 am
content: I hate you!I've wanted a 547 forever.Just kidding.....Nice!

author: Vgkid
author_rank: Super Contributor
timestamp: April 19, 2016, 02:16:52 am
content: Nice score. They are still using a 575 at my college.

author: AF6LJ
author_rank: Unknown
timestamp: April 19, 2016, 02:45:31 am
content: I remember using one decades ago, nice scope.You scored well.

author: MrSlack
author_rank: Frequent Contributor
timestamp: April 19, 2016, 08:36:55 am
content: Awesome haul.I really want a 500 series but my other half said no when I explained the requirement of a "scope-mobile" to her

author: willb
author_rank: Regular Contributor
timestamp: April 19, 2016, 01:38:19 pm
content: My spouse was with me when I picked them up, which was not a good idea! Haha. Luckily for me, we have an agreement that the basement is pretty much all mine! My spouse gave up a long time ago trying to understand my "need" to have so much test equipment.

author: MrSlack
author_rank: Frequent Contributor
timestamp: April 19, 2016, 01:43:32 pm
content: I'm still working on that, and lack the basement

author: Dubbie
author_rank: Unknown
timestamp: April 25, 2016, 07:54:28 am
content: Your boat won't be going anywhere with one of those beauties on the end of the chain!Sent from my phone using Tapatalk

author: Inverted18650
author_rank: Frequent Contributor
timestamp: June 11, 2017, 02:37:27 pm
content: I realize this thread is old but wanted to try here before making a new post:I recently picked up a nice 547 but the amplitude adjustment is not working. I've downloaded the manual and begun reading up on it but want to know if anyone here may know (from experience) the best place to start trouble shooting it. Thank you.
hantek dso5202p equ-time mode - Page 1
Forum section: electronics / testgear

author: femtohertz15
author_rank: Contributor
timestamp: March 12, 2016, 10:37:09 pm
content: Hi all,I just got a Hantek 5202P, and noticed something odd. Above 20ns/div in equivalent time, the waveform reconstruction becomes very erratic, like it is piecing together the wrong slices of waveform. The triggering was fine at 20ns and faster in real-time just in equivelent time the sampling seems to fail. And, at slower than 20ns/div equivalent time works okay (although it isn't really all that useful at the low sleep rates). Is this need a f/w update to latest or does it sound like a hardware bug? A self-cal didn't help. F/W version 3.40.00

author: snoopy
author_rank: Frequent Contributor
timestamp: June 11, 2017, 04:02:12 am
content: HelloI have a Hantek DSO5202B and I could never get Equivalent time sampling working at all. In fact when I enable it and wind the time base up to 2nS the scope hangs. To do equivalent time sampling requires additional hardware which I don't think is implemented correctly on these scopes.cheers
Tek TLA7AAx logic analyser half/quad channel mode - Page 1
Forum section: electronics / testgear

author: Omicron
author_rank: Regular Contributor
timestamp: June 08, 2017, 11:54:29 am
content: The TLA7AAx logic analyser modules can be used in half channel or quad channel mode to increase sampling rate and memory depth. In TLA software 5.x you had a drop down in the module setup screen where you could pick internal "x2" or "x4" clocking to configure the module that way. However after upgrading to TLA software version 6.1 I can't find a similar setting there. The setup screen has been redesigned compared to version 5.x and the popup is no longer there. I can't find anything in the help file either referring to half or quad channel mode.Anyone have any idea how to set this up in version 6.x? Did they remove the functionality? Or maybe you need a support package to enable it again?

author: nctnico
author_rank: Super Contributor
timestamp: June 08, 2017, 04:45:47 pm
content: IIRC you can set the sample clock rate higher and it will reconfigure the channels. Otherwise you have to look in the help.

author: Omicron
author_rank: Regular Contributor
timestamp: June 08, 2017, 05:58:54 pm
content: The sample rate slider doesn't allow me to set it any lower than 2nS. If there is any topic in the help that explains how to set half channel or quad channel mode then I can't find it...Update: found it! The slider won't allow you to go lower than 2nS. Next to the slider is an edit field. It has small up and down buttons. those won't allow you to go lower than 2nS either, but if you type say 500pS in the edit field it accepts it! It reconfigures the inputs as well! Jeez...they really hid that feature away!

author: nctnico
author_rank: Super Contributor
timestamp: June 10, 2017, 11:00:40 pm
content: Good find! I played a bit with the software but was unable to find it myself.
34401A Firmware History/Changes - Page 1
Forum section: electronics / testgear

author: WernerFalken
author_rank: Contributor
timestamp: June 11, 2016, 08:59:25 pm
content: Has anyone been able to locate a list of firmware versions and release notes/changes for them? Seems like unicorns and pixie dust. The latest I've 'seen' is '11-05-02', and I'd like to know what occurred in each change. I do know that, at some point, the front panel MCU (02?)contents became slightly incompatible with specific main revisions (11?)Colby

author: raileon
author_rank: Unknown
timestamp: December 04, 2016, 01:52:16 pm
content: I'm looking for the same information.Is it possible to update the firmware on this model?

author: Samogon
author_rank: Frequent Contributor
timestamp: June 10, 2017, 01:42:44 pm
content: Well PLCC ROM keeps FW it is soldered in. And it is one time writable chip.So in order to update FW you have to write it on new chip and replace it.I did it for HP unit which had rev 3.0 and replaced with rev 10. No issues.Recalibration is needed though.
Triplett 630-NA clean up - stuff to use ?. - Page 1
Forum section: electronics / testgear

author: capnahab
author_rank: Contributor
timestamp: June 10, 2017, 08:20:27 am
content: I have a good condition Triplett 630 from the usual source. I need to get some leads and maybe new batteries. The inside looks clean apart from some mild battery contact corrosion. The case though has had some neglect - some vandal has scratched a few numbers into it and dug a fairly deep scribble into the bakelite next to the com socket. I don't think I will ever get those out. I am posting for general advice and to ask if I could do better.I found the Ever Ready battery replacement (413) here (I am in the UK)http://www.smallbattery.company.org.uk/sbc_a413.htm?a413,ENERGIZER/EVEREADY,413They also have contact cleanerhttp://www.smallbattery.company.org.uk/sbc_corrosion-gone.htmBe interested if anyone has experience of this?, or which of the Caig Deoxit products you would recommend.I have polished the ?bakelite case with Menzerna and it is pretty good product. The pic of the front shows the right side polished and the red switch, the left side front is as an unpolished matt.Could anyone recommend a source of good quality silicon leads with the right size banana plugs?.CheersNick
Cole Electronics T1007 Mains Check Set Manual - Page 1
Forum section: electronics / testgear

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: June 09, 2017, 09:23:34 pm
content: One device I have not been able to find any information about is this mains transient/disturbance detectorCole Electronics (UK, defunct) T1007 Mains Check SetUser manual as well as service manual or excerpts thereof in any format or any pointer to a source of information would be much appreciated!
New Rigol Gear - Page 1
Forum section: electronics / testgear

author: EEVblog
author_rank: Unknown
timestamp: June 09, 2017, 09:28:09 am
content: A little birdie told me there is some new Rigol gear coming and they heard about it on here somewhere?

author: JPortici
author_rank: Super Contributor
timestamp: June 09, 2017, 09:34:57 am
content: pascal may have beaten you to it?https://www.eevblog.com/forum/testgear/rigol-announces-phoenix-chipset-and-ultravision-ii-technology-platform/of course, i'm both highly skeptical and curious

author: EEVblog
author_rank: Unknown
timestamp: June 09, 2017, 10:33:23 am
content: Quote from: JPortici on June 09, 2017, 09:34:57 amThat's the thread I was looking for, thanks.
probe ground spring clip for Siglent PP215? - Page 1
Forum section: electronics / testgear

author: klaff
author_rank: Regular Contributor
timestamp: June 05, 2017, 04:19:02 am
content: Does anyone know where to buy ground springs which fit on the Siglent PP215 probes? I'm talking about the small springs which fit around the exposed ground near the probe tip and are used to reduce inductance in the probe connection. My probes didn't come with them.

author: serggio
author_rank: Regular Contributor
timestamp: June 05, 2017, 04:51:58 am
content: http://probemaster.com/4983hg-high-frequency-ground/But I do not think that spring like that is really useful

author: BravoV
author_rank: Super Contributor
timestamp: June 05, 2017, 04:56:21 am
content: Take a trip at local music instrument stores, buy a guitar's string, using pliers then coil it at a hard metal rod like screw driver or a even a nail will do.

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2017, 05:04:07 am
content: Quote from: klaff on June 05, 2017, 04:19:02 amBugger.A unit I checked does have them and on the product drawing on the pamphlet does show them as part of the package.Mic'ed up the end and yes the Probemaster ones will fit.

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2017, 05:20:59 am
content: Quote from: BravoV on June 05, 2017, 04:56:21 amYep or even some high tensile Mig welding wire would do, 0.6mm is what I'd use.

author: klaff
author_rank: Regular Contributor
timestamp: June 05, 2017, 06:46:00 pm
content: Thanks everyone!

author: klaff
author_rank: Regular Contributor
timestamp: June 05, 2017, 09:34:49 pm
content: Quote from: serggio on June 05, 2017, 04:51:58 amThanks for the link. I've occasionally found them useful when looking at signal integrity issues or details of switching regulator waveforms.

author: klaff
author_rank: Regular Contributor
timestamp: June 09, 2017, 04:00:17 am
content: As a follow up to my own question I thought I would post captures three different ground connections, 1) with no ground connection at the probe (only the house ground connection through the power cords), 2) with the 6 inch / 150 mm alligator connection, and 3) with a spring ground clip.
Keysight 3000T CAN symbolic decode issue - Page 1
Forum section: electronics / testgear

author: rattnallen
author_rank: Contributor
timestamp: June 08, 2017, 10:15:32 pm
content: I'm unable to get signed integers work with CAN symbolig decoding on Keysight MSO-X 3000T.When decoding a signed integer value, decoded value only shows negative values.Positive values is decoded as the value 0.I modified the ABS part in the .dbc-file from Keysight's Application Note 'Debug Automotive Designs Faster with CAN-dbc Symbolic Trigger and Decode' to show two 16bits and four 8bits signed integer values and used the CAN training signal to demonstrate the issue.The 8 byte CAN message 08 50 51 D2 53 11 53 95 should give the values below but shows 0 for the positive values:P1: 08 50 = 0x5008 = 20488P2: 51 D2 = 0xD251 = -11695P3: 53 = 0x53 = 83P4: 11 = 0x11 = 17P5: 53 = 0x53 = 83P6: 95 = 0x95 = -107Bug?Any comments?Modified .dbc-file:BO_ 2190911837 EngineData: 5 EngineDataSG_ Fuel : 8|8@1+ (0.01,12) [0|12] "gal" GatewaySG_ Temp : 24|8@1+ (0.2,135) [-50|150] "C" GatewaySG_ Speed : 32|8@1+ (0.1,2900) [0|8000] "rpm" GatewayBO_ 189 ABS: 8 BrakesSG_ P1 : 0|16@1- (1,0) [-32768|32767] "psi" GatewaySG_ P2 : 16|16@1- (1,0) [-32768|32767] "psi" GatewaySG_ P3 : 32|8@1- (1,0) [-128|127] "psi" GatewaySG_ P4 : 40|8@1- (1,0) [-128|127] "psi" GatewaySG_ P5 : 48|8@1- (1,0) [-128|127] "psi" GatewaySG_ P6 : 56|8@1- (1,0) [-128|127] "psi" GatewayBO_ 127 Airbag: 1 EmergencySG_ Frwd-impact : 7|1@1+ (1,0) [0|1] "" GatewaySG_ Rear-impact : 6|1@1+ (1,0) [0|1] "" GatewaySG_ Left-impact : 2|1@1+ (1,0) [0|1] "" GatewaySG_ Right-impact : 0|1@1+ (1,0) [0|1] "" GatewayBO_ 000 Steering: 4 SteeringSG_ Lock : 20|1@1+ (1,0) [0|1] "" GatewaySG_ Angle : 24|8@1+ (0.03,45) [0|48] "deg" GatewayCM_ "CAN communication matrix for power train electronics*******************************************************implemented: turn lights, warning ligts, windows";VAL_ 127 Frwd-impact 0 "Deployed" 1 "Armed" ;VAL_ 127 Rear-impact 0 "Deployed" 1 "Armed" ;VAL_ 127 Left-impact 0 "Deployed" 1 "Armed" ;VAL_ 127 Right-impact 0 "Deployed" 1 "Armed" ;VAL_ 000 Lock 0 "On" 1 "Off" ;
Datron 1071 - Page 1
Forum section: electronics / testgear

author: kultakala
author_rank: Regular Contributor
timestamp: June 08, 2017, 11:00:59 am
content: Hi All,I had a bargain offer for a Datron 1071.Its not that i need it but i am interested in those "old" instruments, so i took it.According to the date codes on the parts its from 1988, dont know when it was calibrated last time but there are no stickers on it.Unfortunately it is Voltage only, no resistance or current option installed.Best thing is the perfect looking bright display.Hooked it up to my 5v reference and it looks pretty good, although not as good as my SchlumbergerThe Datron computes +/- 28 ppm for uncertainty...Here are some pictures...Cheers,Olaf

author: Gyro
author_rank: Super Contributor
timestamp: June 08, 2017, 11:29:18 am
content: That's a nice evenly lit Panaplex display, it's the only potential issue with second-hand Datrons of that generation because it's custom.
Siglent Firmware - Page 1
Forum section: electronics / testgear

author: eldiegomario
author_rank: Newbie
timestamp: May 02, 2013, 09:37:44 pm
content: Dear forum readers:Buy Siglent SDS1022D oscilloscope.By mistake update the firmware, without observing that it was one for 7-inch screen.Sincerely online service Siglent the firm sent me for my model.The problem is that the oscilloscope can not load a previous version.The Siglent technician does not know how to solve the problem and advised me to send the dealer.No Siglent distributor in Argentina.It happens as I can relive my oscilloscope???Sorry for my bad English.thanksDiego

author: rf-loop
author_rank: Super Contributor
timestamp: May 03, 2013, 07:21:08 am
content: Sad situation.Perhaps you can send letter to Siglent and ask how much is price for spare part main board with economy shipping to Argentinaspecially in this kind of case where FW update crash and it do not accept anymore FW update at all(do not explain too much.... (!)) and you have 3 year warranty. (If they have becouse this is now obsolete model and production ended time ago.)When you ask, send model and serial number so they do not need ask it before they answer.

author: Siglent
author_rank: Regular Contributor
timestamp: June 21, 2013, 03:16:55 am
content: The problem has solved.Our distributor in Argentina had contact to him, and sent him a new main board for replacement.

author: nixxon
author_rank: Frequent Contributor
timestamp: June 21, 2013, 08:23:22 pm
content: Quote from: Siglent on June 21, 2013, 03:16:55 amIf this is the case, it is a very nice gesture of Siglent.

author: Siglent
author_rank: Regular Contributor
timestamp: June 27, 2013, 01:23:22 am
content: Quote from: nixxon on June 21, 2013, 08:23:22 pmThank you for your encouragement , we will do our work better.

author: Stonent
author_rank: Super Contributor
timestamp: June 27, 2013, 01:27:54 am
content: Well then, good job

author: ManMan
author_rank: Newbie
timestamp: June 09, 2017, 02:36:37 pm
content: Hi AllPlease Helpmy Atten ADS1022C+ not work after firmware upgrade ((I need Atten ADS1022..ADS1042..ADS1062 or Siglent SDS1022CFlash dump.and Siglent SDS1022C latest Firmware
Rigol DS1000Z Series Fan Replacement - Page 1
Forum section: electronics / testgear

author: Ducttape
author_rank: Regular Contributor
timestamp: September 28, 2016, 03:39:37 pm
content: A few days ago I moved my Rigol DS1074Z scope to a more convenient position, but now it's right next to my ear and a bit annoying. I decided to replace the fan, per several YouTube videos, with a Gelid low noise one.I found out that although the Gelid is quieter it also pushes less air, and surprisingly pulls more current. At least the sample I bought. I decided to leave the original fan in for better air flow.I thought it would be helpful to at least give some sort of measurable info regarding the noise and air flow, however crude, rather than just rely on even vaguer verbal descriptions. So here's a video.https://youtu.be/-0S6hqwbiyE

author: _Wim_
author_rank: Super Contributor
timestamp: September 28, 2016, 07:32:40 pm
content: Nice test, well done!

author: alsetalokin4017
author_rank: Super Contributor
timestamp: September 29, 2016, 01:09:19 pm
content: I especially like the airflow measurement test fixture!

author: Ducttape
author_rank: Regular Contributor
timestamp: September 29, 2016, 06:14:00 pm
content: Quote from: alsetalokin4017 on September 29, 2016, 01:09:19 pmI spared no expense.

author: ebastler
author_rank: Super Contributor
timestamp: June 08, 2017, 09:54:38 am
content: Quote from: Ducttape on September 29, 2016, 06:14:00 pmVery nicely done, and true to your user name!Thanks!
Service manual for Philips PM3290 - Page 1
Forum section: electronics / testgear

author: romhunter
author_rank: Regular Contributor
timestamp: June 08, 2017, 02:07:53 am
content: hello, I just got a Philips PM3290 off ebay for around 67$ (shipping incl.), look pretty nice to me, 350Mhz and good old brown case design. They sold it as-is so I wonder if anyone here have the service manual to it? I'd love to have a copy to troubleshoot the scope and maybe fix it if necessaryAnd quite off track but should I buy an old 5Mhz oscilloscope to be use as a curve tracer?
Sabtronics 8610B DFM last calibrated 1993 - Page 1
Forum section: electronics / testgear

author: Circlotron
author_rank: Super Contributor
timestamp: June 07, 2017, 07:07:40 am
content: Dragged the old DFM out of the garage today and connected it to the brand new Rigol function generator. I last calibrated this DFM in 1993 using the 15625Hz tv line timebase multiplied by 64 with a 4046 PLL to make 1MHz. Got it dead on and left it for an hour to be sure. The first reading I got at power up showed only 0.5Hz low then finally settled down to 1Hz high. Picture was taken at the 2 hour mark. I thought that was pretty good for a cheap ass DFM that has never particularly been fussed over. Or maybe the function generator is wrong. Can't be sure.
Manual or Schematic for IEC or Racal-Dana F47 function generator please - Page 1
Forum section: electronics / testgear

author: vindoline
author_rank: Unknown
timestamp: October 10, 2014, 01:52:31 pm
content: Hi, I've picked up for cheap a "for parts/repair" Interstate Electronics Corp. High Voltage Log-In Sweep Generator F-47. This model was also sold under the Racal-Dana brand name. I'm looking for the service manual/schematics. I've been unable to find them on the web and though one of you might be able to help. Thanks if you can! Here's a pic:

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: June 06, 2017, 05:13:02 pm
content: I have the same unit, and would love to get a schematic, user manual, or service manual.The board is very detailed. Obviously made for repair.

author: vindoline
author_rank: Unknown
timestamp: June 06, 2017, 06:20:58 pm
content: I never did find a free on-line source for the F47 manual. I ended up buying a scanned copy from Artek Manuals (www.artekmanuals.com) The scan quality was excellent - particularly on the schematics. The price was also very reasonable - $12.50 I think. I've bought from them several times and for me the cost is worth it just for the clean, hi-res scans of the schematics.I have no relationship other than a satisfied customer.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: June 07, 2017, 03:17:47 am
content: So did you get it working?I have the F43, non-sweep version, and it's a real workhorse. Had to fix it once, without schematic. Replaced the output transistors and all is now working fine.It was a little hard to find the correct replacement transistors. Finally got them from UTSource. I did put some heatsinks on some other transistors on the board that were running hot.

author: vindoline
author_rank: Unknown
timestamp: June 07, 2017, 04:37:39 am
content: I did get it working. My unit had an air dielectric variable capacitor that was physically broken. Once I found a suitable replacement, it was working fine. I used the manual to verify operation and follow the calibration procedure. I sold it soon after that. At the time I thought it was too large and heavy for my small lab. Of course, now I have plenty of space and I wish I had it back!
Getting Sigrok on MBP running OSX 10.12 - Page 1
Forum section: electronics / testgear

author: Daque
author_rank: Contributor
timestamp: June 06, 2017, 07:24:31 pm
content: I keep getting errors trying to install it most like this:$ git clone git://sigrok.org/sigrok-utilCloning into 'sigrok-util'...fatal: unable to connect to sigrok.org:sigrok.org[0: 88.99.77.186]: errno=Operation timed outsigrok.org[1: 2a01:4f8:10a:8e::7369:6772:6f6b]: errno=No route to hostI can load the sigrok.org page in my web browser with out issue.I have tried 3 ways to install it all fail. Using instructionshttps://sigrok.org/wiki/Mac_OS_Xi have tried using a script under Homebrew, Building using Homebrew and even just trying to get the CLI version fails ($ brew install sigrok-cli). Anyone get it to install successfully on 10.12? Googling sigrok install osx didn't turn up anything I found useful.I'm at work could the company VPN be the issue?

author: hendorog
author_rank: Super Contributor
timestamp: June 06, 2017, 07:33:19 pm
content: I just tried this on my MBP and it worked correctly:Code:git clone git://sigrok.org/sigrok-utilCloning into 'sigrok-util'...remote: Counting objects: 1778, done.remote: Compressing objects: 100% (1683/1683), done.remote: Total 1778 (delta 1087), reused 151 (delta 88)Receiving objects: 100% (1778/1778), 274.76 KiB | 184.00 KiB/s, done.Resolving deltas: 100% (1087/1087), done.Perhaps the company is blocking the port range used by the git protocol - you might be able to figure out a way of getting it over http protocol instead.https://git-scm.com/book/no-nb/v1/Git-on-the-Server-The-Protocols

author: Daque
author_rank: Contributor
timestamp: June 06, 2017, 07:41:22 pm
content: Thanks. I just thought of the company blocking it while I was typing the question. I'll just take it home to night and try it there.They got kinda picky here about what comes in on the VPN since we got hit with the 2nd ransomwareThey came in via email but hey don't let the facts get in they way a good plan.

author: Daque
author_rank: Contributor
timestamp: June 07, 2017, 12:32:30 am
content: I got it to install using homebrew at home. Thanks again for trying it. It looks like you just need to run pulseview from a terminal window. I played around with using my DS1054z and think I have a pretty good idea of what's going on now. I'm hoping it's easier to view and decode 6 I2C messages spread over 30 seconds with sigrok and a $6 logic analyzer. A whole lot of scrolling with the scope just to find the 2-6 bytes typical of a message.The data sheet for the chip is from 1980 I think (edit my bad chip is from 2000) and it had me confused for a bit as it had what I guess was an old style of using addresses. Address 80 was write and 81 read (maybe the other way) instead of address 40 with a r/w bit as the scope decoded it.Sent from my iPhone using Tapatalk
tektronix p6131 probe en plastic covers - Page 1
Forum section: electronics / testgear

author: scottie4442
author_rank: Unknown
timestamp: June 06, 2017, 09:09:28 pm
content: have two tek p6131 probes that did not come with the plastic caps/covers on the end of the probe (not sure if I am naming them right sorry), the covers slip over the probe tip on the end of the probe. Anyone know where I can get these. I have found the probe accessory kits on ebay but they do not have this piece included. thanks for any help

author: MarkL
author_rank: Unknown
timestamp: June 06, 2017, 09:56:58 pm
content: You might have discovered all this already, but here you go...If you're talking about the long thin sleeve that slips over the metal attenuator tip, the datasheet calls it "Body shell, probe". The part number is 204-0925-01, but any rev other than -01 should be ok.There's a 204-0925-02 on ebay right now for an insane price if you're desperate enough.Looking at pictures, P6130, P6133, P6134 appear to use the same sleeve (and perhaps others in the P613x series?). So, if you can find some of those that are junkers for cheap on ebay that could be an option.The sleeves are unusually thin. Sleeves from other similar probes (e.g., P6139) are slightly wider and will not fit right.This might help:http://www.barrytech.com/tektronix/probes/tekprobes.html
How to get 130mv rms with old scope & meter ? - Page 1
Forum section: electronics / testgear

author: JanJansen
author_rank: Frequent Contributor
timestamp: June 06, 2017, 03:28:56 pm
content: Hi, i need to adjust noise level to 130 milli volt r.m.s.I only have old Phillips scope & old multimeter without r.m.s. funtion.How do i measure that ?, do i need that expensive DMM with RMS function ?thanks in advance

author: barry14
author_rank: Regular Contributor
timestamp: June 06, 2017, 11:04:06 pm
content: If you need good accuracy (say 5% or better), then an RMS meter would be required. If you just want to be in the ballpark (25% or so), then you can use your oscilloscope if the bandwidth of the oscilloscope is at least the bandwidth of the noise (higher bandwidth would be better). Adjust your noise so that the peak-to-peak level of the noise is about 5 times your desired RMS value (this is somewhat of a judgement call because some of the noise spikes could exceed that value), and your display will depend on the brightness level (you said an old scope so I assume it uses a CRT).

author: JanJansen
author_rank: Frequent Contributor
timestamp: June 07, 2017, 03:47:40 pm
content: Hi, thank you, yes i use analog scope.In a while i will buy a nice multimeter with RMS, so i just need to level it about right, then later i make it perfect.Cant i go measure AC voltage with my multimeter ?

author: barry14
author_rank: Regular Contributor
timestamp: June 07, 2017, 11:20:19 pm
content: You did not specify the bandwidth of your noise. Most ordinary DMMs have very limited bandwidth (some as little as 500 Hz) and they do not measure true RMS. Thus they are not very useful for measuring noise type signals.

author: egonotto
author_rank: Super Contributor
timestamp: June 08, 2017, 12:22:49 am
content: Hi,this video shows you how to measure noise rms with an analog scope:https://youtu.be/zHU9xdU51FYBest regardsegonotto

author: David Hess
author_rank: Super Contributor
timestamp: June 08, 2017, 09:55:42 am
content: If egonotto had not linked that video then I would have. You need a dual trace oscilloscope to do tangential noise measurement but it works great.Offhand I do not know the correction factor for measuring RMS noise on an average reading voltmeter but there is another way which may be easier for you. Measure the absolute value of the RMS noise using your oscilloscope once as shown in that video, and then measure the noise using your average reading AC voltmeter. Now you have a calibration for your AC voltmeter and you can fiddle with the noise level and read the output on your voltmeter without repeatedly doing the steps necessary on your oscilloscope.

author: P90
author_rank: Frequent Contributor
timestamp: June 08, 2017, 10:24:03 am
content: throw in the factor that most True RMS multimeters aren't AC+DC, but rather AC coupled.

author: JanJansen
author_rank: Frequent Contributor
timestamp: June 08, 2017, 01:18:12 pm
content: Nice video,i tryd all switches on my scope, i cant find any dual traces.I keep finding more reasons to buy a good DMM.