hybridfree/eevblog-posts huggingface dataset:
How change temp on Quick 202D solder iron - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: July 19, 2021, 02:03:48 pm
content: Hi,Do you know how to change temperature of the Quick 202D solder iron?The docs available for it dont say.It has 3 buttons, up, down and "star"..pressing any of them, or simultaneous combo's, does nothing.The temperature is stuck at 390degc set temperaturehttps://www.pmtech.co.uk/pdfs/TDS/Consumables/quick/202D-ESD.pdf

author: modoran
author_rank: Regular Contributor
timestamp: July 19, 2021, 02:08:26 pm
content: Isn't it using HF at 400khz as Metcal does ? It has a coil, not a heating element inside.If it is so, to change the temperature you change the tip itself.

author: Faringdon
author_rank: Super Contributor
timestamp: July 19, 2021, 04:11:17 pm
content: Thanks , but there are up and down arrows on the unit, with an LCD display showing "set temp" and "real temp"

author: Kean
author_rank: Unknown
timestamp: July 20, 2021, 09:03:42 am
content: Tried the method shown here?

author: Kean
author_rank: Unknown
timestamp: July 20, 2021, 09:05:29 am
content: BTW this really doesn't belong under Test Equipment - It would probably be better under Manufacturing & Assembly
Tek P6243 probe distortion question - Page 1
Forum section: electronics / testgear

author: TimFox
author_rank: Super Contributor
timestamp: July 19, 2021, 09:43:59 pm
content: I recently purchased a Tektronix P6243 x10 high-Z probe and the required 1103 TekProbe power supply from eBay. So far, I have been very careful with it, never connecting it to a signal with a DC component, and obeying the input limits.The power supply signal output must be connected to a DC-coupled 50 ohm load: I have used a TDS 350 DSO with a 50 ohm BNC terminator and a Marconi 2380/2382 400 MHz spectrum analyzer that has a 50 ohm input.So far as I can tell, the unit is performing well, up to the frequency limits of my equipment. I have always connected the probe input through the "KlipChip" and Y-lead adapter provided.Before doing some spectrum-analyzer measurements where harmonic content is important, I thought to measure the THD with an -hp- 339A distortion analyzer (adding a 50 ohm termination at the analyzer input terminal). The generator output is terminated in 600 ohms, the probe goes to the resistor leads via the KlipChip, and about 3 feet of coax goes to the terminator at the analyzer input.The maximum output of the generator is 3 V rms (8.5 V pk-pk) into 600 ohms, well within the P6243 input ratings: +/- 15 V "no damage", +/- 8 V for <4% linearity error. The graph of typical linearity error vs input voltage shows inflections at about -6 V and +8 V.My results: 339A at 90 kHz (100 kHz maximum) with only 400 Hz high-pass filter engaged. All voltages rms.Vin Vout THD3 V 300 mV 0.065%1 V 100 mV 0.064%0.3 V 30 mV 0.092%0.1 V 10 mV 0.013%Not bad, but why so high at 0.3 V? I continued at lower voltagesVin Vout THD10 mV 1 mV 0.017%30 mV 3 mV 0.014%100 mV 10 mV 0.013%200 mV 20 mV 0.014%250 mV 25 mV 0.0145%270 mV 27 mV 0.0135%280 mV 28 mV 0.0135%290 mV 29 mV 0.0135%300 mV 30 mV 0.092% (again!)There is no amplifier diagram in the manual, since it is a proprietary hybrid module.My question is why there is such a sudden discontinuity at 300 mV rms = 848 mV pk-pk input?I can't find any fault in the 339A analyzer when repeating these measurements.

author: David Hess
author_rank: Super Contributor
timestamp: July 20, 2021, 02:48:15 am
content: Active probes are not particularly low distortion and not optimized for it. My guess is that two different distortion mechanisms are constructively and destructively interfering to produce that hump in distortion with amplitude.
Hitachi V-1150 oscilloscope new to me - Page 1
Forum section: electronics / testgear

author: simon32
author_rank: Newbie
timestamp: July 09, 2021, 05:43:01 pm
content: I bought a Hitachi V-1150 on eBay and it works well, although the display flickers. It passes the self test, but the power supply rails are above specification (117 V for 100 V) while the 45 V can be adjusted to 46 V at the end of adjustment, 13.5 V which can be adjusted to 12 V, but then the display shrinks and moves to the bottom right of the screen.It seems as if the primary of the switching transformer is over driven. Ripple on the power rails is within specification. I am wondering if anyone has seen similar behavior on this model scope.SimonI switch on today and the rail voltages are normal: 100 V, 45 V, 12 V, but the display is still fuzzy and the horizontal cursors are dashed lines. After a while the rail voltages jump back to 117 V, 51.5 V and 13.5 V. I think a service of the power supply is in order and maybe change a few caps. I have no idea what causes the power rail voltages to jump by such a large amount.

author: med6753
author_rank: Super Contributor
timestamp: July 10, 2021, 09:07:03 am
content: Welcome to the forum. It is very apparent that there is one or more open or very leaky capacitors in the power supply. I'm not familiar with the construction of Hitachi scopes but hopefully the PSU is an easily removable and separate board. Finding the offenders should be pretty easy. And I would recommend changing ALL the capacitors in the PSU, not just the defectives.

author: simon32
author_rank: Newbie
timestamp: July 10, 2021, 09:32:26 am
content: Thanks for your reply and I have checked all the condensers and they are good. However, on checking the main oscillator IC, a hybrid circuit (STK-7408) I see a couple of pins are shorted to ground and the waveform is not correct. They are obtainable as they are used in TVs so I will order another. It may explain the intermittent changes in rail voltages.Simon

author: AVGresponding
author_rank: Super Contributor
timestamp: July 10, 2021, 10:50:26 am
content: Capacitors which test good on a low voltage handheld tester can sometimes be faulty at higher voltages.

author: simon32
author_rank: Newbie
timestamp: July 17, 2021, 08:47:58 am
content: I replaced the hybrid IC and four condensers whose ESR seemed a bit high. I now have a crisp readout. I don’t think the IC was at fault, more likely a couple of condensers not filtering properly.Simon

author: Grandchuck
author_rank: Super Contributor
timestamp: July 18, 2021, 01:21:36 pm
content: Nice work Simon!

author: simon32
author_rank: Newbie
timestamp: July 20, 2021, 01:45:04 pm
content: I am still not sure which condensers were not up to scratch. Just my luck as while I was familiarizing myself with all the front panel buttons, the power supply cut out. I traced it to an open circuit 22 V zener in the 45 V regulated rail. There are always surprises with old equipmentSimon
Keysight EDU36311A web interface question - Page 1
Forum section: electronics / testgear

author: jayk
author_rank: Regular Contributor
timestamp: July 19, 2021, 09:13:26 pm
content: What's the web interface like on the EDU36311A? Can you so all the basic stuff like power on/off, set voltages, read back currents, etc.? Or do you need to install the BenchVue software to get fairly complete remote-control?
(WTB UK) Velleman K7103 Oscilloscope Kit Floppies or Assembly Manual PDF Wanted - Page 1
Forum section: electronics / testgear

author: Chris56000
author_rank: Frequent Contributor
timestamp: July 19, 2021, 09:47:25 am
content: Hi!I won a mint unbuilt n.o.s. Velleman K7103 2 Ch Oscilloscope Kit whuch was delivered this morning, the kit contained a blue slip of paper with a big print warning that the Assembly Manual and Software were supplied on the enclosed disks, unfortunately they were missing !Has anybody got these two floppies they no longer need to pass on to me please?Failing that, if anyone knows where I can get the files, I'd be very grateful, Velleman deleted them years ago!The files were the K7103 PDF Assembly Manual and WinDSO_fg32 V1.32!Chris Williams

author: Fraser
author_rank: Super Contributor
timestamp: July 19, 2021, 11:58:29 am
content: The Wayback machine may be able to help you. velleman used to bewww.velleman.beso I looked on the Wayback machine and there seems to be a good capture. I have not tested the download links though.https://web.archive.org/web/20000510203024/http://www.velleman.be/index2.htmUpdate: I just tested the download links. Sadly no files on the captures I tried but try others in differnt years, you may get lucky.Fraser

author: Fraser
author_rank: Super Contributor
timestamp: July 19, 2021, 12:16:51 pm
content: Parts list is to be found here so you could, at least assemble the unit from this......https://www.circuitspecialists.com/k7103.htmlThe K7103 Schematic is to be found in the user manual that is still available on the Velleman web site.https://www.velleman.eu/products/view/?id=9368&country=us&lang=enNow it is a case of finding the software.

author: Fraser
author_rank: Super Contributor
timestamp: July 19, 2021, 12:21:34 pm
content: Have you contacted velleman ? They are usually very helpful and were still supplying the software to those needing it in 2017. The software was used on several differnt scopes so may still be available. Ask fo the test software and assembly manual as well.https://forum.whadda.com/t/support-for-2-channel-velleman-pc-storage-oscilloscope-32ms/14477/4Fraser
Brymen BM869s - DCV+ACV and nS conductance functions - Page 1
Forum section: electronics / testgear

author: 4x1md
author_rank: Regular Contributor
timestamp: July 18, 2021, 09:25:36 pm
content: Brymen BM869s has two modes of DCV+ACV measurements (see the attached image). What is the difference between these two modes? The manual doesn't explain it.What is the use case of the nS conductance measurements?Thanks for your answers.

author: KaneTW
author_rank: Frequent Contributor
timestamp: July 18, 2021, 09:32:45 pm
content: DCV on main display, ACV on secondary vs (DC+AC)V on main and ACV on secondarynS is for high impedance measurement.

author: John B
author_rank: Frequent Contributor
timestamp: July 18, 2021, 09:40:22 pm
content: Quote from: 4x1md on July 18, 2021, 09:25:36 pmNote the symbol on the left of the meter screen, when it displays a combined AC and DC symbol. I think the manual does specify the value as being sqrt(AC^2 + DC^2)

author: Specmaster
author_rank: Super Contributor
timestamp: July 18, 2021, 09:48:46 pm
content: The first drawing shows DC voltage with a negative value in the main display and smaller secondary display shows the AC component present in the DC voltage.The second shows the AC and DC together in the main display and the secondary display shows how much of that main display is the AC part.
Brymen 257s audible high pitched noise. - Page 1
Forum section: electronics / testgear

author: derek1985
author_rank: Newbie
timestamp: July 22, 2021, 07:14:10 am
content: Hi guys,I've recently got my Brymen bm257s and noticed that immediately after powering it on (when all the screen characters are lit) there's an audible high pitched noise coming out of it. After power-on the noise seems to disappear, but when i stick my ear close to the screen I can still hear it. Is that a problem with my unit or do you guys also noticed this behaviour of this otherwise great little meter.kind regardsDerek

author: Muttley Snickers
author_rank: Unknown
timestamp: July 22, 2021, 07:20:55 am
content: Welcome to the forum.Does the high pitch sound change or increase when you turn on the backlight?

author: derek1985
author_rank: Newbie
timestamp: July 22, 2021, 07:41:25 am
content: No, it's constant. Doesn't change with any button presses or switching meter modes.

author: Fungus
author_rank: Super Contributor
timestamp: July 22, 2021, 07:52:05 am
content: Quote from: derek1985 on July 22, 2021, 07:14:10 amSolution: Don't do that.(it's probably just ceramic capacitor buzz)

author: AVGresponding
author_rank: Super Contributor
timestamp: July 22, 2021, 07:57:40 am
content: Quote from: Fungus on July 22, 2021, 07:52:05 amAnd be thankful that your hearing is that good!

author: Muttley Snickers
author_rank: Unknown
timestamp: July 22, 2021, 07:58:41 am
content: Quote from: derek1985 on July 22, 2021, 07:41:25 amThe reason I asked was because some early models of the Brymen BM-235 had a noticeable high pitch squeal when the backlight was turned on, there was a fix for this issue specifically for the BM-235, I am not aware of anyone else having a similar concern with the BM-257s.

author: derek1985
author_rank: Newbie
timestamp: July 22, 2021, 08:19:46 am
content: Aaahh, I'm probably being too picky. Thanks for the replies guys. Have a nice day.
Software for PeakTech P6181 - Page 1
Forum section: electronics / testgear

author: TriXxieDK
author_rank: Newbie
timestamp: October 21, 2020, 01:45:43 pm
content: HiI've bought a PeakTech P6181 power supply. However the software included seems to be an older version, and I can see that it's a branded China OEM product (since it's exactly the same as OWON 3-CH). Does anybody have a newer version of the 3 channel software branded as PSEasyControl or ODPEasyControl newer than 1.0.4?I'd like to be able to utilize the network connection to connect to the PSU.Kind regards,Martin

author: adynis
author_rank: Newbie
timestamp: July 18, 2021, 12:56:26 am
content: After 1 year .. I have a similar question.I have Owon P4305 and I have PSEasyControl 1.2.4.Anything newer ?
Discussion in the Metrology section about Keysight refusing to calibrate kit - Page 1
Forum section: electronics / testgear

author: perdrix
author_rank: Frequent Contributor
timestamp: July 17, 2021, 09:20:02 am
content: Seehttps://www.eevblog.com/forum/metrology/keysight-(lack-of)-calibration-other-services/Please don't reply to this post - take comments to the linked discussion
Advice need for replacing DPO 4104 - Page 1
Forum section: electronics / testgear

author: Javaslinger
author_rank: Newbie
timestamp: July 15, 2021, 01:20:05 pm
content: To start with, I'm a chemist - not electrical engineer and my knowledge of scopes is very much limited to the very basic troubleshoot and RF measurements that we do in the lab.We have been using a DPO 4104 to observe NMR signals up to 600Mhz for both equipment troubleshooting and research. This is quite an expensive piece of kit that I managed to kill and now I'm looking for a replacement. Unfortunately, we use the tiniest fraction of capability in an oscilloscope - we look at one, maybe two, rf channels. We have one rf signal and it's clean. We look at things like frequency, peak to peak voltage, signal shape, etc... basic, basic stuff. Still it appears, since we're looking at 600 MHz it seems we need pro level equipment.Currently, I'm looking at the following options:Refurbished Techtronix MDO32 for just under $9KNew Siglnet SDS 5102X $5999New Rigol MSO8064 $7999What should I go with and are there perhaps other options I should consider?

author: Andrew_Debbie
author_rank: Frequent Contributor
timestamp: July 15, 2021, 01:42:25 pm
content: 600MHz / 42.58MHz/T ~ 14T.That is a serious magent.

author: bdunham7
author_rank: Super Contributor
timestamp: July 15, 2021, 02:02:17 pm
content: The Siglent would be a good option, but if you actually use 2 channels, you might want to consider stepping up to the 4-channel version because of the way that Siglent duplexes their ADCs. With the 5102X and 2 channels at 600MHz, you'll have 2.5GSa/s per channel, or 4 samples per period. With the 5104X and using the correct 2 channels (1 and 3) you'll have 5GSa/s per channel or 8 samples per period.At this level, the Rigol and Siglent scopes aren't all that much lower than what you can get LeCroy or Keysight for, so you might want to investigate pricing on those.

author: nctnico
author_rank: Super Contributor
timestamp: July 15, 2021, 06:25:05 pm
content: I have a feeling signal analysis may be interesting. In that case it could be worth looking at a Lecroy scope. But the downside is that Lecroy scopes (and those of Siglent) only capture enough to fill the screen. That may be different to what you are used to when using the Tektronix.Another option can be the R&S RTM3000 series; these have 10 bit ADCs which have a higher resolution.
Agilent 6611C Setting Question - Page 1
Forum section: electronics / testgear

author: sampler1
author_rank: Regular Contributor
timestamp: July 14, 2021, 01:07:34 am
content: Good day!I think this might be a lame question but I can't seem to find the answer. I replaced the digital board in an Agilent 6611C as the original was blown.It is now Functioning as a 6612C after installing the new PCB. In the menu" hold 1 and 0" the different models come up and it is showing it is set to 6612C. I can change it to 6611C but I have no idea how to save that setting?I sure this is an easy one for the pro's.Thanks all!

author: Kean
author_rank: Unknown
timestamp: July 18, 2021, 04:56:58 am
content: Normally on these models I think it is Shift and Save.Have you tried this? What else have you tried?
Fluke scopemeter 105b 99b 97b battery solutions - Page 1
Forum section: electronics / testgear

author: brint.corb
author_rank: Contributor
timestamp: July 24, 2021, 02:43:35 am
content: Hi fellow EEs,I just tried to bring my old Fluke 99b scopemeter back to life but that battery failed. Im providing a solution and its a super easy fix. enjoy.Fluke 99b Batteries and charging, Important Notes(ie, Why you should use NiMh batteries with an external charger!)The fluke 99b charging system was designed for the Fluke PM8086 NiCd battery pack, with a 2600mAh capacity. It provides about 7.2 volts and 150mA, charging all four batteries in series. Like many early NiCd chargers, it uses a fixed time charge model, about 21 hours. This would be just enough power to fully charge the PM8086. It is a very outdated charger, and has several problems, especially if you replace the original with a modern 4000+ mAh NiMh battery pack.1. Charges batteries in series. Inevitably one or more batteries will be under and/or over charged causing them to lose capacity and life. Voltage imbalances will occur, and the pack will be fatally compromised long before its expected life. This is why so many original PM8086 batteries leaked. NiMh batteries should be charged individually.2. Charges batteries for a fixed period of time. The charger will put out 3000 mAh, whether the battery is full or not. This causes overcharging which damages the batteries and often causes leaking and corrosion. Modern chargers use the dV/dt slope method, which is much more accurate, efficient, and protects the batteries from damage.3. The charging power is insufficient for modern NiMh Batteries. The fluke will charge 5000 mAh NiMh battery pack to about 50% capacity, since it was designed for a pack with half that capacity. Thus the battery pack only operates at half capacity, and Halfway charging the batteries damages them and greatly reduces their capacity over time.THE SOLUTION: bypass the Fluke battery charging altogether, and to use a modern battery charger with 4 new NiMh batteries.A good choice for charger is the EBL 4 slot smart Battery charger for c cell batteries. This uses the dV/dt method and can charge 4 batteries in about 5 hours.The Tenergy Centura low self discharge battery offers great cycle life and long shelf life, and has good capacity of 4000 mAh
Rigol DS1000z update 04.05.01.00 - Page 1
Forum section: electronics / testgear

author: Adrian_Arg.
author_rank: Frequent Contributor
timestamp: July 15, 2021, 05:47:35 pm
content: I would like to know if a previous firmware can be reinstalled, because it does not allow me, and it did not correct the capture error in 24Mbit of memory depthhttps://www.eevblog.com/forum/testgear/new-rigol-ds1054z-oscilloscope/?action=dlattach;attach=1236349
Why are sound level meters that measure dBZ so expensive - Page 1
Forum section: electronics / testgear

author: FrankT
author_rank: Regular Contributor
timestamp: July 14, 2021, 08:53:59 pm
content: I'm not an expert in this are so please gently correct me where I'm wrong...I'm looking for a sound level meter that measures low frequency traffic and machinery noise. The cheap meters <$500 seem to only measure weighted dBA and dBC which filters out low frequencies. Meters that measure dBZ seem to be >$2k.Is there anything special about these meters? Is it just software or product demand, or are they made of unobtainium?

author: TimFox
author_rank: Super Contributor
timestamp: July 14, 2021, 08:57:32 pm
content: Microphones with extended low-frequency response are more expensive than those that cut off at higher frequencies.

author: james_s
author_rank: Super Contributor
timestamp: July 14, 2021, 09:05:04 pm
content: Low volume production too, how many people need one of those? They're not selling millions of them a year. I suspect it's more like hundreds.

author: DaJMasta
author_rank: Super Contributor
timestamp: July 14, 2021, 10:43:03 pm
content: Do you actually need to be listening through the air? You can get up to a few tens of Hz mounted to solid materials with a seismometer or similar. They also make microphones designed for these applications (geophones), maybe something like that would suit your task but doesn't show in your searches.
SVA1032X Normalize Option Not Available - Page 1
Forum section: electronics / testgear

author: EBSDallas
author_rank: Newbie
timestamp: July 13, 2021, 03:14:28 am
content: I have a new Siglent SVA 1032X and I can't seem to normalize the instrument.For example, when checking some attenuators with the unit in SA mode, Port 1 connected to Port 2, TG "On" and set from 100kHz to 3.2GHz, TG Level -20dBm, Offset 0, Reference Level 0, Reference Position 100%, The Normalize On/Off option is grayed out as is the Reference Trace Option. I can't seem to figure out how to enable these options to complete the measurement. I have gone through this several times and have downloaded and followed the document on this very measurement from Siglent's website and I can't get past this step. What am I missing?RegardsEBS

author: tautech
author_rank: Super Contributor
timestamp: July 13, 2021, 04:26:00 am
content: Quote from: EBSDallas on July 13, 2021, 03:14:28 amStore Ref.When you store a Ref trace the Normalize button ceases to be greyed out.This you must do. Normalize is done against the stored reference trace which is your current settings and should you change settings a Uncal warning gets displayed.

author: EBSDallas
author_rank: Newbie
timestamp: July 14, 2021, 01:35:29 am
content: tautech:Thank you so much! That's what I was missing; it's working perfectly now.Regards.EBS
USB HS protocol analyzer signal integrity issues - Page 1
Forum section: electronics / testgear

author: abyrvalg
author_rank: Frequent Contributor
timestamp: July 13, 2021, 09:16:18 pm
content: I have an old Ellisys USB Explorer 200 protocol analyzer utilizing a pass thru connection to tap USB D+/- lines. While it works fine in most cases, some USB HS devices start working unreliable when plugged through the analyzer (from showing tons of invalid packets in the capture to failing enumeration completely). I’ve tried many cables from thick shielded ones to cheap and there were just small variations in reliability, except for one case: using a very short (20cm) target side cable instead of more common 80cm ones improves the things a lot.I have very little experience in signal integrity, could someone tell me what factors are the most critical here?- cable lengths? Normally I use 80cm+80cm cables, not so long, but changing one of them to 20cm make things better- cable quality? I’ve tried different ones with little difference- too many connectors in the path? I can replace the host-facing connector with a cable soldered straight to the PCB if that has any point- bad PCB design?I’ve attached a PCB photo, there is a B type socket to connect the host, D+/- lines are routed under UTMI transceiver in a "fly-by" manner and go to device side type A socket. There are two 1M resistors to GND (pulling the lines to a stable state when nothing is connected ?) and a pair of 15k resistors controlled by FPGA (perhaps these are pullups/downs for a generator mode not implemented in my model, but present in other models. Should I try removing them?). The VBUS line is connected on the bottom layer with a pretty thick trace.
Anyone using Hantek handheld oscilloscope? DSO8000E mine sound beep too low. - Page 1
Forum section: electronics / testgear

author: nquantum
author_rank: Regular Contributor
timestamp: July 15, 2021, 07:41:33 am
content: Just want to know your experience about sound beep volume. Mine DSO8202E is very low. I've just bought for 2-3 day and love everything except for sound beep which is very low like whisper!When I press button or use continues test I barely hear sound beep. For many time I've to probe test to check what sound look like.Contact local dealer the answer is "sound program is fixed and not adjustable." also they can't help.I almost think to tear it open and mode sound volume but alas... I'm not Dave jone. No gut to do that yet for new 3-4days tools!
Tektronix 540A No Graticule or Text on Screen - Page 1
Forum section: electronics / testgear

author: shingabiss
author_rank: Newbie
timestamp: July 16, 2021, 06:55:08 pm
content: Scope has been re capped, board washed. All PS voltages correct.Scope does turn on, goes through the usual screen testsanalog clock icon comes onRelay clicks but does not end up with graticule or any text menus on screenThere is a trace on the screen that responds to volts/div and horiz time scale.Hooked up VGA monitor, same as CRT. The dip sw is set for all zeros; right side of rocker switches depressed. Seven segment display first diplays ".L" then segments A and F alternately blinking at about 2Hz. Display never stops this but gets a little faster. It seems it never finishes the boot processAny ideas?Thanks.
HP 83484A plug in Excessive offset  - Page 1
Forum section: electronics / testgear

author: mates
author_rank: Newbie
timestamp: July 12, 2021, 01:01:36 pm
content: Hi all, I recently bought a used plug-in hp 83484A however one of the channels has excessive offset- just see the line on the top of the screen. Is this repairable or this is the end of the input?
Agilent 976A DMM.. ?? - Page 1
Forum section: electronics / testgear

author: zaoka
author_rank: Frequent Contributor
timestamp: April 02, 2016, 05:56:20 pm
content: Just saw on eBay Agilent 976A DMM, never heard of it before. Is it real Agilent or possible fake meter???http://www.ebay.com/itm/Agilent-handheld-multimeter-976A-/252338495205?hash=item3ac08bdee5:g:4IgAAOSwdU1W~KYB

author: Wytnucls
author_rank: Super Contributor
timestamp: April 03, 2016, 02:35:13 am
content: It looks like a rebranded Fluke 19.

author: TheSteve
author_rank: Unknown
timestamp: April 03, 2016, 03:54:16 am
content: Manual looks to be from 1999. I guess Agilent needed a handheld DMM to sell and rebranded Fluke.

author: timbob
author_rank: Contributor
timestamp: July 05, 2021, 06:35:48 pm
content: i know is this and old thread, but i recently picked up a new in box Agilent 976A alot cheaper then what the seller want, when it gets here i take pictures of the inside of it to upload here

author: wolfy007
author_rank: Frequent Contributor
timestamp: July 06, 2021, 03:46:36 am
content: There is this also.http://mrmodemhead.com/blog/gallery/agilent-977a/

author: timbob
author_rank: Contributor
timestamp: July 06, 2021, 04:58:54 am
content: If it look like the 977a then i will not upload, thank you for the link

author: timbob
author_rank: Contributor
timestamp: July 10, 2021, 09:02:49 pm
content: the inside look the same has Mr. ModemHead 977a but here are the spec from the manual
Raw samples from an HP 53310A over GPIB? - Page 1
Forum section: electronics / testgear

author: Tapioca Pudding
author_rank: Newbie
timestamp: July 11, 2021, 08:56:34 pm
content: Has anyone been able to pull raw samples (frequency or time intervals) collected by an HP 53310A over GPIB? I'd like to pull these for some ADEV calculations.For example: If I set the device into Fast Histogram mode and tell it to collect 1,000 samples - can I get those 1,000 samples?The programming reference provides excellent instructions on obtaining the post-processed results (e.g. histogram, plotted data, mean, STD, ...), but I'm trying to get at the raw measurements. There was a question posted in Metrology that gave some insight on obtaining the internal timestampshttps://www.eevblog.com/forum/metrology/hp-53305a-phase-analysis-software/msg1781951/#msg1781951. I've been playing around in that area of memory but can't make heads or tails of anything without documentation.

author: maxwell3e10
author_rank: Frequent Contributor
timestamp: July 12, 2021, 06:17:28 am
content: The histogram does not contain individual frequency measurements anymore, only binned results. But you can get raw continuous frequency measurements using "vs. Time" mode, I showed some results herehttps://www.eevblog.com/forum/metrology/hp53310a-and-other-counter-allan-deviation/msg2253909/#msg2253909If you want to get raw timestamps, one has to either use the 53305 phase analysis software or replicate the commands it sends from decompiled code. It's also possible to get timestamps if you have another reference of similar frequency and you measure TI between channel A and B.In general you'll get better results using frequency measurements because 53310 internally implements an efficient truncated Lambda counting method. The only limitation is that the total length of time for continuous measurements is about 1000 sec.
I am trying to identify this integrated cicuit - Page 1
Forum section: electronics / testgear

author: TRN
author_rank: Unknown
timestamp: July 11, 2021, 03:40:32 pm
content: I am trying identify an integrated circuit which is marked 25TI 51100, the housing appears to be a TSSOP10 package.I searched like hell on the net, but am unable to find anything which resembles this item.Has anybody an idea where/how I can find a datasheet from this component?

author: Andy Watson
author_rank: Super Contributor
timestamp: July 11, 2021, 03:56:43 pm
content: Is this any good?https://www.ti.com/lit/ds/symlink/tps51100.pdf

author: TRN
author_rank: Unknown
timestamp: July 11, 2021, 04:12:28 pm
content: Andy,Yes it isThanks you are a champHow did you manage to find this part so quickly, because I googled like hell with 25TI / 51100 / 25TI51100 etc. etc, and couldn't come up with anything

author: bdunham7
author_rank: Super Contributor
timestamp: July 11, 2021, 04:16:49 pm
content: Try "51100 ic"

author: Andy Watson
author_rank: Super Contributor
timestamp: July 11, 2021, 04:26:37 pm
content: Quote from: TRN on July 11, 2021, 04:12:28 pmI used duckduckgo.

author: TRN
author_rank: Unknown
timestamp: July 11, 2021, 05:14:41 pm
content: Thanks for the tip, which is really apreciated
Looking for manual for Kenwood / Tecstar FGE-1202 - Page 1
Forum section: electronics / testgear

author: insgs
author_rank: Newbie
timestamp: July 11, 2021, 02:30:31 pm
content: Hi all,Does anyone have a PDF of the manual for a Kenwood / Tecstar FGE-1202 function generator? Mine is off frequency, but everything internally checks out OK. It's a nice little backup unit so I'm loathe to scrap it if I can help it.Cheers,Graeme
SDG 1032X - How to turn on both channels at the same time? - Page 1
Forum section: electronics / testgear

author: mio83
author_rank: Regular Contributor
timestamp: July 09, 2021, 07:39:23 pm
content: Hello,I own a the AWG SDS-1021X from Siglent.I found myself in the situation of needing to turn on both channel at the exact same time.However, searching in the interface and then looking in the manual, I failed to find this option.I am pretty sure it must be a supported option, so I am probably overlooking something simple.Do you know what should be done?Thanks!MANUAL:https://www.batronix.com/files/Siglent/Funktionsgeneratoren/SDG1000X/SDG1000X_Manual_EN.pdf

author: ledtester
author_rank: Super Contributor
timestamp: July 09, 2021, 07:56:49 pm
content: Would activating the channels via SCPI work for you? According to the programming guide you would have to send two commands from your computer - one for each channel - but they should execute within milliseconds of each other.The SDG Programming Guide may be found on this page:https://www.siglent.eu/product/1136898/siglent-sdg1032x-30mhz-function-arbitrary-waveform-generator

author: Grandchuck
author_rank: Super Contributor
timestamp: July 09, 2021, 08:06:19 pm
content: Can you use a double pole switch or relay?
SDS2104X Plus: Audible tone at 10ns/div and 5ns/div - Page 1
Forum section: electronics / testgear

author: Domitronic
author_rank: Regular Contributor
timestamp: July 09, 2021, 09:11:38 am
content: Hello,i just bought a SDS2104X Plus and noticed something i never had on any other scope. If i set the timebase to 10ns/div or 5ns/div there is a audible tone with a high frequency. Sounds somewhat similar to coil whine on some power supplies. The tone is gone when the trigger is switched from "run" to "stop". So its related to timebase and trigger.I asked the dealer if this is normal or just my device. He checked and confirmed that it is the same on a device he has in his stock. He contacted Siglent and is waiting for their feedback.So i was wondering if others noticed that as well on their scopes? To check you can just set the timebase to 10ns/div and the trigger to auto. It is also there at 5ns/div but with a higher frequency tone.Thanks for your feedback.

author: djnebs
author_rank: Contributor
timestamp: July 10, 2021, 07:06:29 am
content: Same on mine.Mine needs the right input signal to cause the noise though. I found the sound is very signal dependent. Different signals change the pitch, make it get louder, quieter.Does yours do it with no input signal? Any impact of enabling other channels?Mine seems to happen when I'm looking at high frequencies. Could be because that's when the finer time-base settings are used, like you mentioned.I haven't dug any deeper to investigate why.

author: bob91343
author_rank: Super Contributor
timestamp: July 10, 2021, 05:07:05 pm
content: Stuff like this isn't uncommon. The sweep frequency is causing a magnetostrictive or static vibration at the sweep rate. The usual fix is to find what's vibrating and clamp it more securely.
Thermal imaging diagnostics - The CA10 thermal PCBA analysis camera - Page 1
Forum section: electronics / testgear

author: Fraser
author_rank: Super Contributor
timestamp: July 09, 2021, 06:24:35 pm
content: In case anyone in this forum area has an interest in PCBA diagnostics using a thermal camera, I have completed a review on a dedicated thermal imaging camera designed for such analysis work.The thread may be found herehttps://www.eevblog.com/forum/thermal-imaging/review-dianyang-technology-ca10-circuit-board-thermal-analyzer-repair-rd/
desk stand for handheld dmm - Page 1
Forum section: electronics / testgear

author: justme1968
author_rank: Contributor
timestamp: July 08, 2021, 07:06:18 pm
content: i was searching for a desk stand for a handheld dmm and found nothing i liked. so i tried myself and just finished the first prototype from quite thin and cheap plywood on the 3018 desktop cnc that i bought on prime day.the finished version will be made from 7mm transparent acrylic.i'm not yet sure about some kind of slot to have better storage for the probes, however so far i quite like it.but as this is a first for me in cad and cam i'd like to ask for suggestions and hints and maybe where i did something wrong or usability could be enhanced.thanks!andre

author: Fungus
author_rank: Super Contributor
timestamp: July 08, 2021, 07:23:24 pm
content: can you push the buttons without it sliding around?

author: justme1968
author_rank: Contributor
timestamp: July 08, 2021, 07:34:40 pm
content: in short: yes it should be fine.the current plywood is a little on the light side but it already better than the kickstand on the back.the acrylic will be heavier and will also get some rubber feet. it should be as good as an rigol mso. and if this is not enough there is room below the cut triangle for another traverse that can be made from something heavy like a pice of a metal bar.and if all else fails you can use your thumb while holding the very top lightly. this also works much better than with the kickstand.

author: Fungus
author_rank: Super Contributor
timestamp: July 09, 2021, 05:55:37 am
content: Quote from: justme1968 on July 08, 2021, 07:34:40 pmFor sure.
Cheapest GPIB device  - Page 1
Forum section: electronics / testgear

author: SeoulBigChris
author_rank: Regular Contributor
timestamp: July 05, 2021, 08:52:09 pm
content: I’m doing some GPIB programming after not touching that interface for some 30 years. I currently have a Keithley 195A bench multimeter, and am relearning all I’ve forgotten.So the 195A uses the “old style” IEEE 488.2 standard. I think it would be helpful for my reeducation to own an instrument with the more modern SCPI flavor of GPIB. It would be nice if the instrument was useful in the lab, too. But as the title says, I’m after something used and inexpensive.My off-the-cuff hypothesis when I purchased the used Keithley 195A earlier the year was that perfectly functional test gear can be had for bargain prices if you don’t mind the 1980s look.Can the same be said for slightly newer SCPI-equipped lab gear? Considering only remote-control-less equipment I’m missing from my lab, I’d be thrilled to get a SCPI power supply, function / pulse generator or pulse counter. But for the main goal, anything would do, even a sheep fart counter, as long as it had an SCPI interface.BTW, in hindsight it seems I was lucky to have found a 195A with the AC volts/amps option. Despite this thing looking like a piece of gear from the lab at my first employer back in 1985, it works like a champ.

author: theHWcave
author_rank: Regular Contributor
timestamp: July 06, 2021, 10:08:27 am
content: The OWON XDM1041 bench meter has SCPI but on RS232 (or a USB interface which is really an RS-232 to USB converter, so still showing as a COMx or ttyUSBx). It is very inexpensive and as a multimeter has some user interface quirks but the hardware is ok and it uses the same chipset as Dave's 121GW, so on SCPI its actually not half-bad. There is thread on the XDM1041 on the EEVBlog... and I have put a view videos on it on YouTube in my channel

author: SeoulBigChris
author_rank: Regular Contributor
timestamp: July 08, 2021, 07:53:24 pm
content: Well just one day after posting this, a colleague sent me this HP 34401A bench meter on loan for my testing. It has SCPI, plus it apparently falls into the inexpensive category of used equipment (reportedly ~ $200 eBay prices, he told me).This generation (the 34401A, that is) of test gear might be the sweet spot where age, price, quality, and functionality combine to be a great match for the frugal hobbyist or small company on a budget.

author: Hydron
author_rank: Super Contributor
timestamp: July 09, 2021, 11:03:51 pm
content: I suspect you might end up paying a bit more than $200 for a good used 34401A, but yes the command set will be a bit more modern than the old "R2D2" style used by the brown-era Keithleys!If you just want to play with SCPI rather than specifically GPIB then there also is a lot of affordable kit which you can talk SCPI to via RS232 or USB.
SR560 — Low-noise voltage preamplifier - Schematics - Page 1
Forum section: electronics / testgear

author: branadic
author_rank: Super Contributor
timestamp: April 17, 2020, 06:53:29 pm
content: Hi,does someone has the schematics of Stanford Research SR560 Low-noise voltage preamplifier? Unfortunately they are missing in the manual available on the web. I appreciate any help, thanks.-branadic-

author: DaJMasta
author_rank: Super Contributor
timestamp: April 17, 2020, 07:01:59 pm
content: My guess would be intentionally omitted rather than missing, but the board is double sided and the full BOM is included in the manual along with a block diagram (or at least a description, don't remember offhand), so it shouldn't be hard to reverse engineer/trace out if you need only a portion of it.

author: branadic
author_rank: Super Contributor
timestamp: April 17, 2020, 07:37:58 pm
content: Was already helped and pointed to a version, that includes schematics, thanks.https://doc.xdevs.com/docs/Standford%20Research%20Systems/SR560/Stanford_Research_SR560.pdf-branadic-

author: jfphp
author_rank: Regular Contributor
timestamp: March 09, 2021, 03:25:53 pm
content: I am in the same research : unfortunately your link doen't drive to a manual with the schematics

author: SilverSolder
author_rank: Super Contributor
timestamp: March 09, 2021, 06:15:18 pm
content: Quote from: jfphp on March 09, 2021, 03:25:53 pmWhat do you call the scribbles that begin on Page 15 if not schematics?

author: jfphp
author_rank: Regular Contributor
timestamp: June 23, 2021, 02:50:48 pm
content: Impossible to use this link : security warning !NET::ERR_CERT_DATE_INVALID

author: Chris56000
author_rank: Frequent Contributor
timestamp: July 08, 2021, 07:51:17 pm
content: Hi!Try here:–https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.physics.wisc.edu/courses/home/spring2020/407/407_Lab_Instrument_Manuals/SR560-low-noise_amplifier-filter/SR560_w_schematics.pdf&ved=2ahUKEwjt-bDandTxAhVyQUEAHRQsCTYQFnoECAcQAQ&usg=AOvVaw3tZB8PsL7aV3HclmCwmojPIf this goes dead I'll upload it to k04BB and BAMA!Chris Williams
Help: Need firmwares for HP4396B Opt010 hacking work - Page 1
Forum section: electronics / testgear

author: copyright927
author_rank: Newbie
timestamp: July 08, 2021, 04:44:20 am
content: I recentlly bought a HP4396B which is marked as "stuck at power on" .Repairing it is a simple work--just a short circult tantalum cap on A3 board. But soon I realized it dosen't have the impedance analyse function. HP named it as Network/Spectrum/Impedance analyzer, however the impedance analyse function is a option(Opt010). After search I believe Opt010 is a software option,so I tried to hack it. I download firmware from my 4396 but can't find any useful clue about the problem in it. I am looking for more 4396 firmware with 010 option for comparison.ThanksPS:To download your firmware, you need floppy disk*2 and an old PC with floppy drive(or a usb floppy drive).Push  button.With keeping the key pushed down, turn the analyzer power on. You'll be in the bootloader menu and can update/backup firmware by using the softkeys.My firmware is attached in case of need.(Bootloader V1.00,Firmware V1.12.OPT 1D6)
CAT rating input DMM mode of Hantek DSO8000E?  - Page 1
Forum section: electronics / testgear

author: nquantum
author_rank: Regular Contributor
timestamp: July 08, 2021, 01:39:54 am
content: I have just baught Hantek DSO8202E for personal hobby use in house. Mainly for electronic stuff and RC. I like that it have more equipments build into it.Specification is CAT I, II, III in input of scope. But not mention in DMM mode which is difference input only say Maximum Input Voltage AC: 600V DC: 800V, Large fuse confirms to European Safety Standard.Question1 is It also rating CAT III for input of DMM also? And is that quite reliable? I know the price is can not compare to Fluke scope meter. So I may not expect protection be the same. Just want to know how much I can expect from my tool for safety.2 Plan to have dedicate multimeter Fluke 179, does the DMM of Hantek scope meter can comparable to Fluke 179?
fluke 83V displays shortly F83 at initialization. - Page 1
Forum section: electronics / testgear

author: joopterwijn
author_rank: Newbie
timestamp: July 07, 2021, 07:30:43 pm
content: Dear brother and sisters,I have a (small) question, my Fluke 83V multimeter displays shortly the code "F83" when I initialize the meter. It seems further to function normally. Searching the forum and internet does not revile an answer. The manual is not helping either, so no RFTM :-) I only find that error codes (if thatch it is it,..) are proprietary to Fluke :-(Does anyone has a tip, or answer for me what the F83 is indicating?

author: Cymaphore
author_rank: Regular Contributor
timestamp: July 07, 2021, 08:05:16 pm
content: That message indicates that you have aFluke83.

author: joopterwijn
author_rank: Newbie
timestamp: July 07, 2021, 08:14:57 pm
content: If that is it ,.... (hahahha) I feel stupid thanks...

author: BeBuLamar
author_rank: Super Contributor
timestamp: July 07, 2021, 10:35:27 pm
content: Now I have to dig into the Fluke manuals and see any of the manuals mentioned this fact. I have many Fluke and it seems natural but don't know if the manual would say so.

author: rvalente
author_rank: Frequent Contributor
timestamp: July 08, 2021, 01:09:20 am
content: The question you should be asking is: Is it possible to hack a 83V in a 87V?
Difference between BK Precision 1655 and 1655A AC Power Supply? - Page 1
Forum section: electronics / testgear

author: MRiddickW
author_rank: Contributor
timestamp: July 04, 2021, 10:40:23 pm
content: Hi all,Can anyone tell me the difference between the BK Precision 1655 and 1655A AC Power Supply? I found a 1655 (non-"A") in great condition on Craigslist for $125, and I'm wondering if there's any reason to not jump on it.Visually speaking, they seem nearly identical. The one difference I can tell is that the listing mentions the weight of the 1655 as 12 lbs, whereas BK Precision lists the weight of the 1655A as 22 lbs. I don'tpreferboat anchors, but it makes me wonder if the 1655A is beefier somehow.I've attached a couple of pictures from the listing for visual reference.Thanks!

author: bdunham7
author_rank: Super Contributor
timestamp: July 04, 2021, 11:38:59 pm
content: It looks mint. Buy it--those things have rocketed up in price in the past few years and while I paid a bit less than that for mine, they typically go for much more now.The BK1655 is the older, US-made version with a US-made Staco variac. The 1655A is a later, slightly different appearance and case style Taiwan-made model. AFAIK, they have the same schematic and specifications. Is the 12 lbs from the Craigslist listing? I haven't weighed mine but IIRC it is pretty heavy. I doubt they are significantly different.

author: MRiddickW
author_rank: Contributor
timestamp: July 05, 2021, 01:45:59 am
content: Got it! Thanks for the encouragement!Yeah, the weight was from the listing, I think it must have been a fat finger.

author: MRiddickW
author_rank: Contributor
timestamp: July 05, 2021, 08:31:42 pm
content: Looking back, I think maybe they copy/pasted the dimensions and weight from a different listing they had for a couple of BK Precision 1711 DC supplies. (And no I did not buy them... I already have more DC power supplies than I need!)I am slightly perturbed that they didn't manage to fit it a half-rack form factor or narrower; I don't have a rack unit, but it throws off the otherwise nice stacking I have!Last question because I'm incapable of making my own decisions: Can someone please give me permission to throw away the original cardboard box it came in?!

author: bdunham7
author_rank: Super Contributor
timestamp: July 05, 2021, 09:00:50 pm
content: Quote from: MRiddickW on July 05, 2021, 08:31:42 pmNope! Cut the tape off and fold it flat, then stash it away somewhere. If you go to resell it on eBay, you'll be glad you did.

author: MRiddickW
author_rank: Contributor
timestamp: July 07, 2021, 04:00:58 am
content: Ugh. You're the worst, but you're right.I swear, between guitar cases, guitar pedal boxes, and now test equipment boxes, I'm starting to think about renting a storage unit just to store all my storage accoutrements!
How to get the capacity of a battery using a PROTEK EL300 electronic load/dp832  - Page 1
Forum section: electronics / testgear

author: drprinter
author_rank: Newbie
timestamp: July 08, 2021, 01:02:32 pm
content: Hi I have a slight problem. I need to get the capacity of different batteries (eg 18650, NiCads etc). I have a PROTEK EL300 Electronic load which I can not find too much info on it (also rebranded arrow 3711 and other makes). Tried to contact Protek to get there software but I have had no response. is there a way between my (ebay purchased) PROTEK EL300 and my Rigol DP832 to determine the battery capacity of different batteries?