hybridfree/eevblog-posts huggingface dataset:
Cursor and test mask self-adjusting to timebase change on Keysight vs Siglent  - Page 1
Forum section: electronics / testgear

author: TK
author_rank: Super Contributor
timestamp: May 14, 2019, 11:22:43 pm
content: I am evaluating the Siglent SDS1104X-E vs my current Keysight EDUX1002G. When I set the cursor and pass/fail mask on my EDUX1002G, they get re-scaled / auto-adjusted when I change the timebase. The SDS1104X-E does not do the same. They remain the same asking the user to do extra steps to re-adjust them (the same with Gate definition on measurements). Is there any reason why the SDS1104X-E is not re-adjusting them? Is there any advantage on one vs the other?

author: Someone
author_rank: Super Contributor
timestamp: May 15, 2019, 12:51:51 am
content: Quote from: TK on May 14, 2019, 11:22:43 pmHow far will it rescale before you see undesirable artefacts? The mask is usually just an overlay on the screen histogram and not catching all the waveform(s). So it can be just a bitmap of the pixels to include/exclude rather than a geometric description of the mask opening.

author: TK
author_rank: Super Contributor
timestamp: May 15, 2019, 01:00:07 am
content: About 2-3 timebase settings. I have not tested the cursors, but I think there is no limit
New 121gw meter odd VAC readings - Page 1
Forum section: electronics / testgear

author: kelemvor
author_rank: Regular Contributor
timestamp: May 02, 2019, 09:19:04 pm
content: Hello,I'm kind of a noob so I'm sure I'm just doing something stupid here. I keep getting vac readings on my 1.21gw when there shouldn't be anything. They tend to drop off over time. I was just playing with the meter connected to my crappy 30v bench power supply (pevono ps305H). I'm pretty sure it's the meter that has the problem because I do the same test with my no-name meter and get 0vac also with my fluke 117 I get 0vac. I don't think it's within the range of my crappy meter, but it should be in range for the fluke. I don't have a scope to connect to the ps. I did add two 1000μF filter caps to the power supply when I got it.I've included a screenshot from the 121gw app that shows the reading over time.http://www.kellyphotos.org/ForumPics/eevblog/121gv%20ac%20voltage.jpgSeems odd to me. Am I making some noob mistake?I get similar behavior from it if the probes aren't connected at all.Firmware: 1.57I just got the meter today.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 02, 2019, 09:31:33 pm
content: you should post in the 121 gw threads instead .........
Tek RSA3308A Option Keys - Page 1
Forum section: electronics / testgear

author: chris719
author_rank: Newbie
timestamp: May 03, 2019, 02:14:01 am
content: Does anyone know if there is a way to get these anywhere? I called Tektronix and they aren't even available for purchase anymore. Would like to enable Option 21. I know people have found the keys for the MDOs, but not many posts on the spectrum analyzers.Thanks!
Bench multimeter for school lab environment. - Page 1
Forum section: electronics / testgear

author: Bugsyson
author_rank: Contributor
timestamp: May 02, 2019, 12:00:54 am
content: Hi all, just started teaching, and our labs are in need of a bench meter upgrade. Requesting from people in the know their two cents on a decent bench meter that will survive first year collage students. Spec's for meter are very light, we are starting them off from ground zero and end up after two years building and testing radio equipment. 2 year Avionics program.The big requirements are survive the abuse, measure milli amps and volts AC and DC. Oh and have really cheap fuses, as teaching someone to measure current has turned out to be way harder than I ever thought it would be.Thank you in advance

author: windsmurf
author_rank: Frequent Contributor
timestamp: May 02, 2019, 02:56:54 am
content: Tenma bench multimeters seem to get high marks for its low cost and decent performance, especially for educational use.For fuses, you can probably source some low-cost ones that meet its specs.
Poll: Keysight (Agilent), Tektronix, LeCroy, R&S Etc DSO with Special Interface - Page 1
Forum section: electronics / testgear

author: Mechatrommer
author_rank: Super Contributor
timestamp: May 01, 2019, 11:10:32 am
content: The objective for this poll is to show how many or the most popular Higher End Model DSO brand among anyone who can vote here. Higher end means the DSO with special interface specifically Probe Interface, but if you think other interface worth mentioning, please vote and post your interface/suggestion here. It doesnt necessarily means "expensive" or "new model", it can be $20 cheap and very old unit, as long as it has special (probe) interface. If you have $100K DSO that only use standard BNC interface as input and no I2C communication nor power rails etc to feed into the (active) probe system, you dont have to vote (this includes the famous entry Rigol DS1000Z and Siglent et al), just enjoy the result. for voters, it can be helpful to post your DSO brand and model number, the special interface type if its not already mentioned, or any other posts/links etc that you think revelant. Cheers and Thank you.ps: I'm particularly interested in DSO probe interface, so with this vote i can see which brand is worth to invest more time studying or developing. I know few names, ProLink for LeCroy, ProbeConnect for Tektronix if i'm not mistaken. This can also help if someone out there or here want to make 3rd party or add-on accessories or just simply reverse engineering to DSO brand for personal/hobby use. with this i think i explained it all. Cheers.Rules: you can vote up to 5 votes in case you have multiple brand, and you can change in case you've made a mistake, but please dont abuse it for fun. and anybody can see the result, not just the voters, this is a public poll, for the sake of the matter. Thanks.
Analog Option for R&S URE RMS-Voltmeter needed ? - Page 1
Forum section: electronics / testgear

author: induzer
author_rank: Contributor
timestamp: May 01, 2019, 10:24:42 am
content: Hello there,is anyone in need for a Option URE-B2: OPT. DC-OUT for their R&S URE RMS-Voltmeter ?The option modul in mine didn't work, the mosfets in the dc-dc section had died.I decided to design a new one, my idea was to remove the discrete squarewave DC-DC converter on the board. So I went with an integrated one.Now I have parts, PCB's and Unobtanium-DAC's for 9 further modules in spare and would like to share them.Please PM me, if interested.hack on,induzer
Request for ASSEMBLY manual - HeathKit CO-1015 Ignition Scope - Page 1
Forum section: electronics / testgear

author: Joule Thief
author_rank: Regular Contributor
timestamp: June 12, 2014, 09:14:07 am
content: Anyone have access to a PDF or wish to sell anASSEMBLYmanual (not operators manual or schematics) for a HeathKit CO-1015 Ignition Analyzer Scope?Google is all dried up for anything on this model except for schematics.Thanks in advance.

author: xwarp
author_rank: Frequent Contributor
timestamp: June 12, 2014, 09:32:32 am
content: Good luck, but I'll keep a look out for one for you.I had wanted one of those to use on my 1985 truck but the prices were more than I wanted to pay.A while later I picked up a Snap On MT-1665 automotive oscilloscope with cart, cables, and manuals for $40.

author: Joule Thief
author_rank: Regular Contributor
timestamp: June 12, 2014, 11:28:07 am
content: Thanks XWarp.I'm trying to revive one to use for tinkering with vintage 4 cycle single cylinder lawn and garden tractors. I appreciate the diagnostic info these can deliver and wanted to see how well my experience using one on multi-cylinder automobile engines correlates to single cylinder garden tractors. Of course the tach circuit will have to be modded to allow single cylinder direct readout of RPMS. It will be interesting to see if weak coil output, air fuel mixture and cylinder turbulence from valve issues can be detected from the scope pattern.

author: ludzinc
author_rank: Unknown
timestamp: June 12, 2014, 12:00:44 pm
content: http://www.ebay.com/itm/ORIG-VTG-HEATHKIT-IGNITION-ANALYZER-ASSEMBLY-MANUAL-IO-20-/281354386798?pt=US_Manuals_Magazines&hash=item4182073d6e

author: Joule Thief
author_rank: Regular Contributor
timestamp: June 13, 2014, 09:14:09 am
content: Thanks Ludzinc,unfortunately, that link leads to a previous model of the ignition analyzer - the vacuum tube version.Thanks anyway

author: kens
author_rank: Newbie
timestamp: July 28, 2014, 06:04:54 am
content: Joule Thief are you still looking for an assembly manual for the CO-1015 Analyzer? I have one. message me. or, ken55ford2001@yahoo.com

author: druthers
author_rank: Newbie
timestamp: June 28, 2016, 06:12:41 pm
content: Did you find a manual? I have the whole caboodle -- analyzer, assembly manual and users manual. Can scan for you.

author: Gerhard
author_rank: Newbie
timestamp: May 01, 2019, 07:15:30 am
content: Hi druthers,I am Gerhard, a Heathkit Collector in Germany.For EUR 20 I was able to save a CO-1015 with the optional power inverter from ending up at the recycling place.The Analyzer seems to work, but is missing the 2 pickups. And NO Manual online.I just read that you offered to scan your Manuals.Are they still available?Greetings from GermanyGerhard, DF1DA
Another HP 53131A, 53132A, etc., power switch modification - Page 1
Forum section: electronics / testgear

author: ArthurDent
author_rank: Super Contributor
timestamp: May 01, 2019, 03:58:12 am
content: There have been a few power on switch modifications for the HP5313X frequency counters and I initially just put a SPST toggle switch on the back of mine in series with the A.C. power and that worked fine. However reaching around back to fumble for the switch grew old pretty fast.Gerry Sweeney () modified the front panel circuit board by removing the existing switch and putting a mechanical switch button in that location with a bent rod to activate a DPST switch wired in series with the A.C. power so the on-standby feature of the counter was eliminated. The new mechanical switch was also placed where my high stability oscillator (opt 10) is mounted and that mod would eliminate the OCXO from being powered to stabilize while having the display off.Wayne Holder (https://sites.google.com/site/wayneholder/hp-53131a-power-off-mod) made a more complicated modification that accomplished the same thing but his could be undone if you decided to sell the counter as stock.The modification I made does involve drilling one hole in the front panel just under the channel 3 input jack and using a bent rod to clear the 3Ghz (opt 30) board to activate a SPST push on-off switch I recovered from an old 1970s dead DMM. The rod is coupled to the switch shaft with a short piece of small rubber air hose like is used for aquarium air pumps. The switch is wired in series with just the hot side of the IEC power connector on the back which is the common way to wire a power switch in the States. The bracket for the switch did also require drilling 2 small mounting holes in the side rail.What I ended up with is a modification that allows the counter to operate as intended with OCXO and channel 3 options installed but I can completely power the counter down if I use an external time base and don’t want to have the counter partially powered in standby mode. Here are some photos of what I did.
HP3466a - removing battery option (J700) - Page 1
Forum section: electronics / testgear

author: Rax
author_rank: Super Contributor
timestamp: May 06, 2019, 04:37:42 am
content: Hi all,Fervent reader; seldom poster.I just got to restore all functions on my HP3466A - dc current being a bit reluctant to cooperate, all else dead on - and would love to remove the useless battery option which mine came with. Reportedly, this is done by J700, but I could not figure out what the jumper connects. Anyone has a snip, or some direction?...Many thanks!Radu.

author: wn1fju
author_rank: Frequent Contributor
timestamp: May 06, 2019, 12:56:51 pm
content: Remove the cable connector from the battery pack (you can leave the battery pack in the unit if you want) and solder jumper as shown in picture.

author: Rax
author_rank: Super Contributor
timestamp: May 07, 2019, 12:49:09 am
content: Thank you! Perfectly clear.Now I just have to figure out how to remove the battery option module. It's held in place with these locking washers... Can't imagine why they did that.Thank you again.
SOLVED - Rigol MSO5000 firmware reset without UI? - Page 1
Forum section: electronics / testgear

author: Harvs
author_rank: Super Contributor
timestamp: April 30, 2019, 09:12:55 am
content: I've got a Rigol MSO5000 that today decided to fail on start halfway through the day. Gets to the UI, and I can get a single button push in before the UI locks up. I haven't used the ethernet before, but assuming it would be DHCP by default, it doesn't show up in an ip scan.At a guess it would seem like a file has been corrupted, but hard to be sure? Seems like it locks up as it's finalising the boot process.It's hacked and I have the /rigol/data folder backed up. It's not very old, so would normally be a warranty job, but it's pretty obvious it has a whole lot of stuff enabled that I didn't buy keys for.So anyway is there a way to reset or reload the firmware without the normal menu access and without opening the case? Or is it a matter of cracking it open to get to the uart?Sorry if there's something I've missed with my searching and this has already be answered somewhere.

author: Harvs
author_rank: Super Contributor
timestamp: April 30, 2019, 10:18:39 am
content: Found it, I knew it would be in there somewhere!https://www.eevblog.com/forum/testgear/hacking-the-rigol-mso5000-series-oscilloscopes/msg2250807/#msg2250807Thanks to everyone who contributes to this great wealth of info. Scopes all good again.
Agilent ESA PSA 8753 4418 8712 operating manuals - Page 1
Forum section: electronics / testgear

author: woodchips
author_rank: Frequent Contributor
timestamp: April 30, 2019, 03:50:45 pm
content: Don't know if any interest in these, thought this heading would be more use than the for sale one.All look to be new and unused. Collected from various places, I will never need them now.E4418B/E4419B power meter prog8712 ET/ES & 8714 ET/ES rf network analyser serviceESA spectrum analyser calibrationESA SA user'sESA SA user/prog refESA-E SA specificationESA-L SA specificationPSA & ESA SA phase noise opt 226ESA SA calibrationESA SA getting startedPSA SA instrument messages & functional testsESA SA user & programming ref vol 1PSA & ESA SA instrument messages & functional testsPSA & ESA SA measurement guide & programming examples8753E opt 11 network analyser users8753E opt 11 NA quick reference8753E opt 11 NA HP-IB programming & command reference8753E opt 11 NA HP basic programming examples8753E opt 11 NA instructions & quick start8753E opt 11 NA system verification & performance testsMany of these are heavy and chunky manuals, any postage costs are likewise likely to be high, particularly outside mainland UK.
Fiberpro LE-155-6A Lightwave Equalizer - Page 1
Forum section: electronics / testgear

author: Dzale
author_rank: Newbie
timestamp: April 25, 2019, 11:41:19 pm
content: Hi,I have acquired this instrument for a really good price, but I'm unable to find out what is it really.Do anybody know its purpose, how to test it and what projects will be interesting with it?Thanks to all!

author: Specmaster
author_rank: Super Contributor
timestamp: April 26, 2019, 12:07:41 am
content: I'm guessing that is something that is used to test out fibre optic cables for transmission qualities?

author: Dzale
author_rank: Newbie
timestamp: April 26, 2019, 12:21:23 pm
content: It is clear to me that it is for optic fiber testing, but what kind of testing, is it some kind of optical filter for waves, or is it some signal conditioning instrument?Thank you for reply
So who slipped a Fluke on the barbie? - Page 1
Forum section: electronics / testgear

author: nctnico
author_rank: Super Contributor
timestamp: April 27, 2019, 08:19:17 pm
content: Perhaps Dave went on another hiking trip?

author: joeqsmith
author_rank: Super Contributor
timestamp: April 27, 2019, 08:34:35 pm
content: The gold standard doesn't look so golden anymore.

author: mr.fabe
author_rank: Regular Contributor
timestamp: April 27, 2019, 08:41:56 pm
content: and you wonder why nobody wants you to borrow their tools...

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 27, 2019, 09:11:57 pm
content: Would guess mechanic over barbie. At least the screen is still readable.Tim

author: med6753
author_rank: Super Contributor
timestamp: April 27, 2019, 09:38:58 pm
content: Nobody asked the obvious question. Does it still work??

author: DaJMasta
author_rank: Super Contributor
timestamp: April 28, 2019, 12:34:06 am
content: Quote from: med6753 on April 27, 2019, 09:38:58 pmJust from a glance, I'd expect it to.Maybe send it through the dishwasher to get her cleaned up first

author: vk6zgo
author_rank: Super Contributor
timestamp: April 28, 2019, 12:45:07 am
content: Quote from: med6753 on April 27, 2019, 09:38:58 pmIt would be a total "fluke" if it didn't!

author: james_s
author_rank: Super Contributor
timestamp: April 28, 2019, 04:19:44 am
content: Either a mechanic or somebody working on heavy factory equipment, field service is brutal on tools.

author: windsmurf
author_rank: Frequent Contributor
timestamp: April 28, 2019, 08:20:49 am
content: Quote from: nctnico on April 27, 2019, 08:19:17 pmI think that's just what happens when Dave gets introduced to Paul.https://www.youtube.com/watch?time_continue=42&v=Xn_CPrCS8gs

author: Rerouter
author_rank: Super Contributor
timestamp: April 28, 2019, 08:27:53 am
content: That doesnt look like fire to me, more like heavy oils, e.g. hydraulic fluid, dissolving into the plastic,

author: eKretz
author_rank: Frequent Contributor
timestamp: April 28, 2019, 04:12:32 pm
content: Yeah that looks like the work of greasy dirty hands. Tools look similar after doing field work at the steel mills too.
Keysight scope and sigrok - Page 1
Forum section: electronics / testgear

author: gaminn
author_rank: Frequent Contributor
timestamp: April 15, 2019, 10:06:41 am
content: Hi,I have Keysight MSOX2000 which I don't see as a hardware supported by sigrok (https://sigrok.org/wiki/Supported_hardware). Do you know a comfortable way one can analyze data from the scope using sigrok (at the moment I want to decode full speed USB mainly)?ThanksMartin

author: LapTop006
author_rank: Unknown
timestamp: April 19, 2019, 08:57:21 am
content: I did that with my MSO6000X by doing a single shot capture of the waveform, then saving it to CSV on a USB drive, which I transformed into a merged single CSV file with logic thresholds applied, which opened right up in pulseview.I keep meaning to write a blog post about it, but haven't gotten to it yet.If you don't need to analyse the ultra-low-level you might be better off using somethingsupported by Wireshark.

author: Herbertl
author_rank: Contributor
timestamp: April 27, 2019, 08:29:02 pm
content: I know it is probably not the answer you hoped for, but as far as I am concerned I was having trouble with simple hardware that was supported by sigrok but did not work with it.A scope is way more complex to handle.Most manufacturers offer software for their scopes. Have you checked the Keysight website?May that is an option for you?What data would you like analyse?
el cheapo xy scope - Page 1
Forum section: electronics / testgear

author: m3vuv
author_rank: Super Contributor
timestamp: September 11, 2018, 08:47:31 am
content: hi does anyone know of a cheap pocket scope that will do xy mode,just want one for a component tester?,cheers m3vuv.

author: Ebusikan
author_rank: Newbie
timestamp: September 11, 2018, 10:07:27 am
content: I think this message is a good one to follow.

author: tkamiya
author_rank: Super Contributor
timestamp: September 19, 2018, 07:46:04 pm
content: I've been looking for one, too. DSO seem to do very badly in XY mode with super slow refresh modes.Cheapest solution for you may be to buy older 20Mhz scope on eBay and set it to XY mode. Another thing is, even good quality digital scopes do not have Z axis. So there is no way to blank out the dot. If you have any retrace, then that will show too. I have a couple of off-brand scope for this purpose. It works very very well for this.

author: m3vuv
author_rank: Super Contributor
timestamp: September 22, 2018, 09:03:26 am
content: its not the solution im looking for,i already have a tek scope and a hitachi,im looking for someting pocket sized and battery powered,refresh rates are not an issue,i want to use it with a battery powered sine wave generator for curve tracing components,ie octopuss,component tester.,the whole idea is to have something battery powered and small to use in the field without lugging scopes ,inverters etc around.

author: tkamiya
author_rank: Super Contributor
timestamp: September 22, 2018, 10:12:46 am
content: That's a very good idea. Good luck with that.

author: Miti
author_rank: Super Contributor
timestamp: September 22, 2018, 11:15:44 am
content: Take a look at this:

author: DieterLaser
author_rank: Newbie
timestamp: April 02, 2019, 02:11:00 pm
content: or this:https://youtu.be/G4w3OJqbB90

author: m3vuv
author_rank: Super Contributor
timestamp: April 26, 2019, 10:46:36 am
content: nice demo but where do you buy one,ebay draws a blank google too!

author: Peabody
author_rank: Super Contributor
timestamp: April 26, 2019, 01:43:02 pm
content: This is a new product that I'm not sure is quite ready for shipping, but it appears to be what you're looking for.https://jyetech.com/wave2-2-channel-oscilloscope/
Play Tetris on a Transistor Tester,   Because Why Not? - Page 1
Forum section: electronics / testgear

author: coromonadalix
author_rank: Super Contributor
timestamp: May 03, 2019, 08:28:08 pm
content: just saw that on Hack a dayhttps://dragaosemchama.com/en/2019/04/gm328a-reverse-engineering-new-firmware-and-tetris/very nice implementation

author: hwj-d
author_rank: Frequent Contributor
timestamp: May 03, 2019, 08:45:43 pm
content: Wow, that's nice
Wish to repair Tenma 72-8155 capactiance meter  - Page 1
Forum section: electronics / testgear

author: ocset
author_rank: Super Contributor
timestamp: April 24, 2019, 08:03:25 pm
content: Hi,Today I tried to measure the capacitance of a 100n ceramic cap on an unpowered PCB that had not been powered for several days. In service this capacitor has 339V pk on it.I used a Tenma 72-8155 capacitance meter....https://uk.farnell.com/tenma/72-8155...8mm/dp/1283643There was a “click” type sound as I probed the capacitor with the 72-8155 meter….which I guess was some excess charge on the capacitor discharging through the meter.After this, the meter would not work.I am surprised that the capacitance range doesn’t have overvoltage protection on it.I wonder if anyone has a schematic of this meter?.... because maybe its just a crowbar circuit that has gone and blown a fuse.Seriously, capacitors often have excess voltage left on them and its so easy to forget…so I’m amazed the meter was not protected against this.Now neither the R, L or C aspect of the meter works..its totally dead.How may i repair?

author: ebastler
author_rank: Super Contributor
timestamp: April 25, 2019, 03:39:01 pm
content: The below thread has a (hard-to-read) schematic which is claimed to apply to the Tenma meter. Also mentions that it is identical to the UT 603; maybe that's another lead to a schematic?https://www.eevblog.com/forum/repair/tenma-72-8155-(ut-603)-lcr-meter-bin-or-repair/
Fluke 110 Plus/114 Easter Egg - Page 1
Forum section: electronics / testgear

author: ogdento
author_rank: Regular Contributor
timestamp: April 24, 2019, 11:56:05 pm
content: I recently got a free, beat-up, and dead-ish 117 meter. Knowing that it uses the same board as the 110plus/114/115/116 I picked up a cheap working 110plus for comparison (I read on eevblog that the 110plus is a 114 rebadged for Lowes).After seeing a cool post by Excavatoree about his Fluke 10 (link below) and being aware of other similar Fluke trickiness I wondered if the Hz, Diode, and Cap functions might work on the 110.The 110 dial won't rotate past continuity so I put the 110 board into the 117 top case and indeed the Diode/Cap setting works! I haven't yet modified the 110 to allow the extra rotation but I've attached photos of the two so you can see the stops.Sadly, the Hz setting does not work - the yellow button responds only with an irritated beep. On volt alert or current settings the meter displays ---- as could be expected.I've attached some other photos of the internals showing the differences...here's Excavatoree's post about modding his Fluke 10:https://www.eevblog.com/forum/chat/fluke-25-my-first-digital-multimeter/msg36115/#msg36115
Anritsu ms2711d  or  S331  Firmware upgrade - [SOLVED] - Page 1
Forum section: electronics / testgear

author: luisprata
author_rank: Regular Contributor
timestamp: September 21, 2018, 01:20:08 am
content: Does anyone have the latest firmware version? I'm using "Master Software Tools" but It is unable to download the file CMCV534.bin.Update: Firmware attached.

author: jbass
author_rank: Newbie
timestamp: April 24, 2019, 12:19:18 am
content: I'm a bit late to the party, but thanks for posting this; I needed it as well.
Pacific Measurements or Wavetek 1038-N10/NS20 & NS201 - Page 1
Forum section: electronics / testgear

author: PrecisionAnalytic
author_rank: Regular Contributor
timestamp: March 16, 2019, 12:10:44 am
content: Hi,Received a Pacific Measurements D14 with a 1038-NS20 module after some rough shipping and Wavetek 1038-NS201 and have a 1038-N10 and two detectors on the way.I have no information regarding other than the OPERATIONAL HANDBOOK that I'll post what I photographed so far as an attachment to this post.I'm planning to update the information on the Tekwiki site eventually once I photograph and/or scan what documents I've purchased. I notice there is no reference to the D14 on the Pacific Measurements 1038 web page.http://w140.com/tekwiki/wiki/Pacific_Measurements_1038I'm wondering, does anyone have any suggestions, questions, comments and/or information relating to this system or similar systems?Walter has been a great help as his site is the only reference regarding any detail other than a few messages in another EEVblog Forum post:https://www.sphere.bc.ca/test/rf-analyzers.html(Note he just posted some equipment in the groups.io for stuff day:https://groups.io/g/TekScopes/message/155375)https://www.eevblog.com/forum/testgear/tektronix-5000-series-(1970-1990-era)-shenanigans/msg1264368/#msg1264368Anyone know anything about these systems or have any information or experience to share?I'm wondering more-so issues to look out for, maintenance, tips/tricks and anything to consider.I'd also like to find a MAINTENANCE and SCHEMATICS Manual for the N10/NS20 and NS201 as well as for the Detectors since I'm thinking I can make the detectors. Looks like the cable that is missing is a RJ21 Telco 50 cable since has screws and therefore most likely not a SCSI1. I didn't measure the details yet... though just going by looks.Thanks for your time in advance and I appreciate your feedback! This is a big systems analysis capabilities jump for me on the bench, and if safe in the field, if I can get operational and in spec... whatever that spec is???

author: PrecisionAnalytic
author_rank: Regular Contributor
timestamp: April 23, 2019, 04:05:43 am
content: I'm trying to open source share and still gather information regarding the Pacific Measurements or Wavetek 1038 system.I updated the Tekwiki regarding, have more to scan and figured I'd reach out to this group to see if we have any of the missing pieces of the puzzle of details I'm trying to find.http://w140.com/tekwiki/wiki/Pacific_Measurements_1038Please reply here or on one of the groups.io threads where I posted.https://groups.io/g/TekScopes2/topic/pacific_measurements_or/31300494I created a FB page also if anyone is interested and wants to show off their Pacific Measurements and/or Wavetek systems:https://www.facebook.com/groups/698747963909529/Thanks in advance for your time, consideration and support!
Keysight New Style DAQ970A. Next DMM4xxA? - Page 1
Forum section: electronics / testgear

author: AG7CK
author_rank: Regular Contributor
timestamp: October 30, 2018, 12:58:03 pm
content: Quote fromhttps://docs-emea.rs-online.com/webdocs/1680/0900766b816802f3.pdf:"DAQ970A: Basic data acquisition, static measurements, replaces the existing 34970A/72A with several improvements"The instrument has ACAL and is probably based on the measurement innards of 34465A.Quote fromhttps://www.keysight.com/main/editorial.jspx?cc=TH&lc=eng&ckey=2693281&id=2693281&cmpid=zzfindnewlook"The instruments and components in the new design are charcoal gray and other gray tones, accented with Keysight's signature red, white, and black."Source:https://docs-emea.rs-online.com/webdocs/1680/0900766b816802f3.pdf"Key Competitive Products:Keithley DAQ6510 Data Acquisition SystemRigol M300 Data Acquisition SystemNational Instruments CompactDAQFluke 2638 Data Acquisition System"Datasheet:https://docs-emea.rs-online.com/webdocs/167e/0900766b8167e002.pdf

author: HighVoltage
author_rank: Super Contributor
timestamp: October 30, 2018, 02:56:52 pm
content: It looks nice ... but it seems the multiplexer cards from the older 34972A will not be compatible, too bad.And since it is listing the Keithley DAQ6510 as a competitive product, it will probably be a 6 1/2 digit system.I was looking forward to a stable 7 1/2 digit DAQ system from Keysight.But, who knows, may be that will be next.

author: TheSteve
author_rank: Unknown
timestamp: October 30, 2018, 06:12:54 pm
content: I wonder what OS this runs. Perhaps it is the first in what we believe the new series of equipment will be that does not run WinCE.

author: purfield
author_rank: Regular Contributor
timestamp: April 22, 2019, 06:09:15 pm
content: Pretty excited to see this as I've been waiting for a more modern bench top DAQ from Keysight. They have some Youtube videos on their channel about it. I wish the trend chart would display more than one channel at a time. I'd love to be able to monitor all of my signals graphically at the same time, but not sure I want to rely on BenchVue for that...
Fluke 540A Transfer Standard - Page 1
Forum section: electronics / testgear

author: HalFoster
author_rank: Frequent Contributor
timestamp: April 22, 2019, 02:03:13 pm
content: All:I have a Fluke 540A transfer standard that is in very good condition and I would like to do a full restoration but I can't find any information on it. The 540B model, yes, but not the 540A.Does anyone have anything that they could share?Thank you!Hal

author: HalFoster
author_rank: Frequent Contributor
timestamp: April 22, 2019, 05:37:24 pm
content: Pic:
BK Precision 2190 Calibration Manual? - Page 1
Forum section: electronics / testgear

author: Sharkster
author_rank: Newbie
timestamp: April 22, 2019, 04:27:53 pm
content: Hello, Does anyone have an electronic copy of the Calibration or User Manuals for a BK Precision model 2190 100 Mhz oscilloscope? Or, does anyone happen to know if there is an alternative manufacturer for this product? I've searched, but had no luck thus far.
Agilent E4400B Reverse Overload - Page 1
Forum section: electronics / testgear

author: RCHRDM
author_rank: Regular Contributor
timestamp: April 22, 2019, 12:02:31 am
content: I am embarrassed to say that I accidentally sent RF into the signal generator at about 50 watts. This is higher than the overload circuit can protect, I think.The resistance across the output N-connector is zero or open. It should be 50 Ohms, right (with power off)?The signal generator still has a normal output as far as I can tell.Does anyone know how to check this out and repair it?I am looking through the service manual.Richard

author: nctnico
author_rank: Super Contributor
timestamp: April 22, 2019, 12:32:29 am
content: But it is still working? If yes, consider yourself lucky and carry on.I have a similar generator; AFAIK that has a relay inside which disconnects the output in case of reverse power (or overload).

author: RCHRDM
author_rank: Regular Contributor
timestamp: April 22, 2019, 01:34:21 am
content: Thanks! That's encouraging.But shouldn't the RF output connector measure 50 Ohms (power off)?Richard

author: TheSteve
author_rank: Unknown
timestamp: April 22, 2019, 01:38:55 am
content: I believe the output is AC coupled so you'll likely measure an open.

author: RCHRDM
author_rank: Regular Contributor
timestamp: April 22, 2019, 01:48:30 am
content: SIGH OF RELIEF!I tried testing the output with my oscilloscope with an output of 10 MHz and 10 mV. Everything looks good!I really appreciate your help. That makes a bad evening turn into a good evening!I will be more careful...Ricahrd

author: bob91343
author_rank: Super Contributor
timestamp: April 22, 2019, 04:04:40 am
content: I recently did the same thing with my HP 8657B. After resetting the reverse protector, the output was down about 20 dB although everything else worked.I tracked it down to bad SPDT switch(es) in the frequency doubler. Replaced those and now all is well again. And learned a lesson on repairing SMT.

author: RCHRDM
author_rank: Regular Contributor
timestamp: April 22, 2019, 04:09:36 am
content: Good work! I have not worked on SMD stuff yet...Richard
HP 54601a voltage input question - Page 1
Forum section: electronics / testgear

author: Tjj226_Angel
author_rank: Contributor
timestamp: April 20, 2019, 08:16:07 pm
content: Hello everyone.I am trying to find an oscilloscope that can work with very high voltages (1Kv+). I work with a lot of vacuum tubes and I would like to be able to monitor tube tube plates to see the signal output.I came across a HP/agilent 54601a for a good price. I read the manual and it says that it can handle 400v input. However the manual also states that it comes with 10:1 probes. I am trying to figure out if 400v is the maximum I can use with a 1:1 probe, or if it is the maximum I can use with the included 10:1 probe.

author: 0culus
author_rank: Super Contributor
timestamp: April 20, 2019, 08:33:27 pm
content: I'm not aware of any 'scopes that, without voltage dividers, handle that much on the front end. Personally, I'd use 10:1 or even 100:1 probes and protect the 'scope from seeing the full voltage. Better yet, for safety's sake, get a proper HV probing setup, e.g.https://www.tek.com/high-voltage-probe-single-ended

author: rf-loop
author_rank: Super Contributor
timestamp: April 21, 2019, 03:57:11 pm
content: Quote from: Tjj226_Angel on April 20, 2019, 08:16:07 pmMaximum input is 400V (DC + pk AC)Input is oscilloscope front panel BNC connector.Probe specifications are separate and Probe max voltages need read from probe specification.When probe is set for 1:1 then 400V to probe tip is also level in oscilloscope input.1:10 probe do not mean that you can connect 4000V DC to probe tip and then oscilloscope input level is again accepted 400V. Normal usual probe can not handle this level.Then, also from probe data sheet need look carefully its max voltage but do not forget to read what is acceptable voltage level with higher frequencies. Example: Some probe 1:10 may be specified for 600Vp-p but after some tens of kHz this may be lot of less, example with 100kHz it may be 200Vp-p and 1MHz it may be only 50Vp-p and so on.But, when oscilloscope specification tell example 400V it means level between scope input BNC center tap and GND. It need note of course that it also include peaks. So, example "dirty" 400V DC need be careful because it may include peaks what goes to over (undefined) damage level.I have tested example Siglent scope inputs what are specified for 400VDC + pk AC). No problem at all with clean 400VDC.But, so or so, I do not still recommend it for use with 400Vdc even when it can last it without damage.For more safe use least 1kV 1:10 probe - depending situation. And for your needs least 2kV 1:100 probe what have also trusted safety, example Fluke and many others have some. (seriously, who can trust $10 100MHz 2kV 1:100 chinese elcheapo probe )HP54601A specs tell input BNC connector level.www.testequipmenthq.com/datasheets/Agilent-54601A-Datasheet.pdf
New DMM - BM235 or BM257 for Heating engineer? - Page 1
Forum section: electronics / testgear

author: coppertree
author_rank: Newbie
timestamp: April 22, 2019, 09:03:27 pm
content: Hi Folks,I have managed with a fairly basic DMM for a number of years, it's starting to act oddly and thought it about time to invest in something half decent.mainly to help with occasional diagnostics on gas boilers. sobasic safety checksresistance readings on NTC thermistorsflame rectificationsometimes DC voltage to gas valves and fans etcafter some researching it seems the BM235 or BM257 looks a solid reliable robust day to day meter in the field?would you agree? and for my purposes would the 235 be adequate - any advantage getting the 257?i have found them on telonic.co.uk - about £76.00 for 235 - £90.00 for 257So not much difference in price and for me would be a business expenceAlways good to have the opinion of people with knowledge - every day's a school day!Thanks in advance for any advice

author: 2N3055
author_rank: Super Contributor
timestamp: April 22, 2019, 09:38:16 pm
content: 235 has VFD mode (frequency converter mode filter) but 257 has such frequency response so it doesn't need one...257 is slightly more accurate and has bar-graph ...Otherwise, they are very similar, both good instruments, both more than enough for stated purpose... They both should be way more than half decent, they are pro level kit.Regards
Agilent E4406A System Password? - Page 1
Forum section: electronics / testgear

author: RCHRDM
author_rank: Regular Contributor
timestamp: March 20, 2019, 05:47:50 am
content: I am trying to connect to an E4406A and use FTP to update the OS and personalities.Using the updater software is not really working.Has anyone figured out the user name and password for this instrument? I can't find this in the service manual.Richard

author: harha
author_rank: Contributor
timestamp: April 21, 2019, 04:40:57 am
content: HiYour update program should work without passwords---its service---vsaYou are welcome to contact me offline---hardyhansen mail.tele.dkHardy
Miniscope with Knobs? - Page 1
Forum section: electronics / testgear

author: wholder
author_rank: Regular Contributor
timestamp: April 21, 2019, 02:31:00 am
content: Back in the day I used to use the Tek 200 series scopes for work out in the wild outdoors. In their time, these mini scopes were, like all things Tek back then, wonderfully designed and a joy to use (except perhaps for battery life.) I've been thinking about getting a more modern, LCD-based portable scope such as the ones packaged as DVM, but I dislike having to use up[/down buttons for setting things like position, scale, etc. and prefer having real knobs for these settings. Does anyone know of any field-portable scopes that are designed this way?Wayne

author: LaurentR
author_rank: Frequent Contributor
timestamp: April 21, 2019, 02:37:11 am
content: Micsig has a knobbed version of their tablet scope.http://www.micsig.com/html/86.htmlI have no experience with those - just mentioning their existence.

author: IDEngineer
author_rank: Super Contributor
timestamp: April 21, 2019, 03:29:31 am
content: That is a VERY interesting scope. Is it new? I don't seem to find any reviews of the STO1000C series. Lots of reviews of the "pure tablet" version without the separate knob/button human interface panel, but none of the STO1000C series.I do a fair bit of development work in hotel rooms and my present Owon handheld scope leaves a lot to be desired. I'd love to read a review of this Micsig series. Pointers to any review would be most appreciated!EDIT: Naturally, after typing this message I found a thread that discusses this scope. For the convenience of others, here it is:https://www.eevblog.com/forum/testgear/micsig-sto1104c-tablet-scope-with-knobs-on!/
Tektronix lube? - Page 1
Forum section: electronics / testgear

author: innkeeper
author_rank: Unknown
timestamp: April 17, 2019, 10:24:22 pm
content: I recently acquired a Tektronix 576 curve tracer cerca 1975.Interestingly they actually have a recommended maintenance for cleaning and lubing the switches, pots, and bushings and of course, they recommend you use Textronix lubesI'm curious what those lubes actually were/are. If anyone knows, please post. I've noted what id typically use for lubricating the items they describe. let me know what you think of those too.3 lubes are ..1. α cleaning-type lubricant (such as Tektronix Part Νο . 006-0218-00) on shaft bushings andswitch contacts.note: kind of curious on this as I've used like a deoxit D to clean switches and bushings but lubed the bushings with a drop of synthetic oil, or on occasion a drop of deoxit F in a pinch.2. Lubricate switch detents with α heavier grease (such as Tektronix Part Νο. 006-0219-00).note: I typically clean out the old grease using Isopropyl Alcohol or at least finish with it so there's no grease residue and re-lube with superlube, I have used lucas X-tra on occasion3. Potentiometers that are not sealed should be lubricated with α lubricantwhich will not affect electrical characteristics (such as Tektronix Part Νο. 006-0220-00)Note: Typically clean with deoxit D and lube with deoxit F, and on wirewounds that can be disassembled I have used superlube if i disassemble them.snippet from the manualCode:PREVENTIVE MAINTENANCECAUTIONAvoid the use of chemical cleaning agents whichmight damage the plastics used in this instrument.Avoid chemicals which contain benzene, toluene,xylene, acetone or similar solvents.LubricationThe reliability of potentiometers, rotary switches, andother moving parts can be maintained if they are keptproperly lubricated. Use α cleaning-type lubricant (such asTektronix Part Νο . 006-0218-00) on shaft bushings andswitch contacts. Lubricate switch detents with α heaviergrease (such as Tektronix Part Νο. 006-0219-00). Potentiometersthat are not sealed should be lubricated with α lubricantwhich will not affect electrical characteristics (such asTektronix Part Νο. 006-0220-00) . Do not use excessive lubrication. Α lubrication kit containing the necessary lubricantsand instructions is available from Tektronix, Inc.(Order Tektronix Part Νο . 003-0342-00).It is very refreshing to read a manual that assumes your smart enough to fix your own stuff, and actually see it build so you can easily get inside of and really were expected to.

author: TERRA Operative
author_rank: Super Contributor
timestamp: April 18, 2019, 01:10:31 am
content: A plastic safe lithium grease would probably work well.I am interested in this too, for when I finally get around to restoring the 577 under my bench.

author: David Hess
author_rank: Super Contributor
timestamp: April 19, 2019, 03:22:47 am
content: I would use a naphtha and PPE (poly phenyl ether) based contact cleaner and lubricant for the slide switches and potentiometers. A white lithium grease is suitable for the cam detents.
Hantek HDG2022B Arbitrary Function Generator - no output - Page 1
Forum section: electronics / testgear

author: Duaneh
author_rank: Newbie
timestamp: April 18, 2019, 02:02:09 am
content: My generator suddenly stopped outputting a signal. The display and inputs seem to work just fine. Anyone have an idea where I could get a manual for this, or send it for repair? I tried the Hantek web site - what joke! I hate to toss this, but I'm beginning to believe that there isn't a way to get these looked at for any reasonable cost.

author: Daruosha
author_rank: Regular Contributor
timestamp: April 18, 2019, 02:10:42 am
content: Check the two 12V and -12V regulators at the bottom left of the main board. I had the same issue (it was my own fault, did a lot of thinkering with it) and had a similar symptoms. It can be anything, however I guess the quickest way is to check all the supply rails.Keep us informed, I have a rather good understanding of the PCB layout and architecture of this particular AWG.

author: Duaneh
author_rank: Newbie
timestamp: April 18, 2019, 06:50:59 pm
content: I'll do that and let you know.
Mustool MT77 Multimeter - Page 1
Forum section: electronics / testgear

author: EEVblog
author_rank: Unknown
timestamp: April 15, 2019, 01:43:49 pm
content: https://www.banggood.com/MUSTOOL-MT77-Digital-Multimeter-Large-Screen-Smart-Digital-Multimeter-3-Line-Display-Fully-Auto-Range-True-RMS-6000-Counts-DMM-with-Analog-Bargraph-p-1450742.html?rmmds=search&cur_warehouse=CNFunky design, but it's asingle rangemultimeter

author: Fungus
author_rank: Super Contributor
timestamp: April 15, 2019, 02:13:26 pm
content: For hipsters who want to poke at mains electricity?Edit: There's symbols for Ohms and continuity on the front panel.

author: EEVblog
author_rank: Unknown
timestamp: April 16, 2019, 06:11:52 am
content: Quote from: Fungus on April 15, 2019, 02:13:26 pmSingle ohms range!

author: H.O
author_rank: Frequent Contributor
timestamp: April 16, 2019, 10:23:13 am
content: Usually I'd trust the specifications in the manual over what the text in the item description on Banggood says butsurelyit can't be a single range can it !?Clearly the manual lists a single range per function only but the item description says "fully autoranging" and lists the specs:Display: 6000 countsDC Voltage: 60mV/600mV/6V/60V/600V ±(0.8%+3)AC Voltage: 60mV/600mV/6V/60V/600V ±(1.2%+5)Resistance: 0.006Ω/0.06Ω/0.6Ω/6Ω/60Ω/600Ω/6kΩ ±(1.2%+3)Frequency: 10Hz/100Hz/1KHz ±(1.0%+5)6kΩ on the highest range, impressive :-)

author: Fungus
author_rank: Super Contributor
timestamp: April 16, 2019, 04:03:41 pm
content: Quote from: H.O on April 16, 2019, 10:23:13 amI'm impressed by the 0.006Ω range. That gives micro Ohm resolution in a 6000 count meter.

author: Fungus
author_rank: Super Contributor
timestamp: April 16, 2019, 04:18:00 pm
content: You can download the manual here:http://myosuploads3.banggood.com/products/20190411/20190411214240ADMS7.pdfIt only has one range for Volts (up to 600V in 0.1V steps), another one for Ohms (up to 6000 Ohms in 1-Ohm steps) and frequency up to 1kHz in AC Volts mode.Three minute auto-power off. How annoying will that be?On the bright side: It has a bar graph and it looks like a smartphone when it sticks out of your pocket. Members of the opposite sex will think you have a new iPhone!

author: MegaVolt
author_rank: Frequent Contributor
timestamp: April 17, 2019, 11:28:49 am
content: Instruction describing the screen says mV, kOhm, MOhm ....

author: Fungus
author_rank: Super Contributor
timestamp: April 17, 2019, 12:00:15 pm
content: Quote from: MegaVolt on April 17, 2019, 11:28:49 amMaybe that's for version 2.0
metrotech lmg 200 oscilloscope - Page 1
Forum section: electronics / testgear

author: irvDelgado
author_rank: Newbie
timestamp: December 15, 2017, 09:43:48 am
content: Hello everyone, I was wondering if anyone knows anything about this oscilloscope (I think), I found it for 30 dollars but I can't find any information about it.Thanks!

author: StillTrying
author_rank: Super Contributor
timestamp: December 15, 2017, 02:06:21 pm
content: It's probably a TDR for testing long cables, I think you've got the only one of that model! maybe even a one off prototype or something.

author: rhrnl
author_rank: Newbie
timestamp: April 17, 2019, 11:25:20 pm
content: It is a pulse reflection meter for cable and coax,to determe open or shorted cable length.workt on 12v NICAD batteries.