hybridfree/eevblog-posts huggingface dataset:
Rigol S1210 Software for DSA815TG - Page 1
Forum section: electronics / testgear

author: DeanA
author_rank: Regular Contributor
timestamp: June 10, 2020, 12:27:23 am
content: Hi,I've been having some difficulties trying to get the S1210 software working with DSA815 to produce EMC reports. I'm not really having much luck so was just wondering if others have been able to use this software successfully.Thanks.

author: Kean
author_rank: Unknown
timestamp: June 10, 2020, 09:03:35 am
content: Have you already paid for the Rigol software?I can recommend the Tekbox EMCview software - very easy to get up and running.

author: DeanA
author_rank: Regular Contributor
timestamp: June 10, 2020, 10:58:01 pm
content: Yes, have already paid as I needed the EMI-DSA800 option for other things. I can't even get the trace to update properly even with it set to clear-write repeat. Just wondering if I'm doing something wrong and should keep trying or if I should just give it up as buggy unusable software from Rigol ?

author: Kean
author_rank: Unknown
timestamp: June 11, 2020, 03:56:19 pm
content: Quote from: DeanA on June 10, 2020, 10:58:01 pmExcept the EMI option is licensed separately from the S1210 software... unless you got some bundle deal?I haven't used the S1210 software, but if it didn't work I'd start by contacting support and likely very soon after asking for a refund.As Peter mentions, firmware version is likely to be important.

author: DeanA
author_rank: Regular Contributor
timestamp: June 12, 2020, 01:03:49 am
content: Quote from: Kean on June 11, 2020, 03:56:19 pmOk, Thanks,Yeh, I got the bundle deal.I have firmware version 00.01.19And UltraSigma version 1.06.01So, that should work according to Pedre Reply #1041 on other thread (unless S1210 needs something different to Ultra Spectrum?).

author: DeanA
author_rank: Regular Contributor
timestamp: June 12, 2020, 01:10:59 am
content: Ok, I just found thishttps://rigol.force.com/support/s/article/S1210-Using-dBuV-units-successfullyon the Rigol website as well which could account for another issue I was seeing (107db offset)
Rigol DS1202Z-E / DS1000Z network password problem - Page 1
Forum section: electronics / testgear

author: duckduck
author_rank: Frequent Contributor
timestamp: June 11, 2020, 07:27:01 pm
content: Recently bought a Rigol DS1202Z-E as a first scope. I'm a computer geek into security so I figure I would change the network password (when you access the device over the network using the built-in web server) from the default password of "111111".Do not do this.This had two effects on my scope: (1) This immediately disables DHCP (get the scope's IP address from the network) which sets the IP address to the autoconfigured 169.x.x.x which means that you must re-enable DHCP using the buttons on the scope Utility > IO Setting > LAN Conf. > Configure, etc. (2) It changed the password to God-knows-what, and now neither "111111" nor the password that I changed it to (I copy and paste from a PW utility so no chance of fat-fingering) will work.I assume that changing the network password is not part of UAT / the test plan after making changes to the firmware. I'm off to contact Rigol support. I'll post the outcome.

author: duckduck
author_rank: Frequent Contributor
timestamp: June 12, 2020, 12:46:03 am
content: Rigol support replied quickly.QuoteI tried this and it worked. Not satisfied with leaving the default password, I changed the password to another 6-digit number and this time I got a "Successful" message, which I didn't get last time when I tried to change the password to 9 alpha characters. Don't tell me that the internal web server isn't doing input sanitization and the unexpected chars were written somewhere they shouldn't have been because the code is crap and everything runs as root? Hey, look, it's another network-connected instrument / industrial device with buggy/insecure network code. "I'm shocked, shocked to find that gambling is going on in here!" Oh, well, I got my local problem resolved and my feathers are unruffled again.
TDS694C Trigger Jitter - Page 1
Forum section: electronics / testgear

author: fitch
author_rank: Contributor
timestamp: June 04, 2020, 05:18:51 pm
content: Hello all. I recently obtained a high speed pulse generator just to confirm the BW of my new R&S scope. But while I was at it, I wanted to see how my old TDS694C did. What I found is that all channels behave the same and they all exhibit about 40ps peak to peak jitter on the trigger.I was worried that my scope may have failing trigger ICs, but since all the channels look the same I am not so sure. Does anyone know what to expect triggering something like this? The edge rate of the signal is ~ 40ps and it has an amplitude of about 800mV. Seems to me that sampling at 10GHz means 100ps between samples. I don't know what kind of games Tek plays with triggering something like this. Maybe this is the best the scope can do?What should I expect for trigger jitter?If my scope is faulty, does anyone know what kind of repair I am looking at?Thanks!

author: fitch
author_rank: Contributor
timestamp: June 10, 2020, 11:52:19 pm
content: Can someone explain how the trigger on a scope like the TDS694C works? How does the scope know where the analog trigger occurs relative to the discrete samples?Thanks.

author: madao
author_rank: Frequent Contributor
timestamp: June 11, 2020, 03:17:23 am
content: Trigger circuit is nearly similar with TDS520B, which you can found service-manual with schematic of him.But i am not sure by TDS694C. By TDS684C, i am very sure: same trigger-amplifier & ciruit.

author: KE5FX
author_rank: Super Contributor
timestamp: June 11, 2020, 04:15:28 am
content: Does it look like this?If so, they all do that. Not much is known about the inner workings of these things, but the lack of Nyquist margin probably doesn't help much.

author: fitch
author_rank: Contributor
timestamp: June 11, 2020, 11:50:36 pm
content: Similar, but I see much more jitter than I see on your scope. I guess I could have posted this earlier. The trigger appears to be a constant voltage, but the display seems to have some horizontal (time) noise in it. The signal I am sampling has a low duty cycle and I am only capturing a single screen worth of data. As I stated earlier, all 4 channels behave the same, so either they are all working, or something common to them all is broken.
Advantest R3132 issues - Page 1
Forum section: electronics / testgear

author: tconil
author_rank: Newbie
timestamp: June 10, 2020, 10:15:54 am
content: HiI'm a newbie on this forum, I live in France and I'm about to buy a second hand Advantec R3132 Spectrum.I read carefully the Operation Manual and, however, I didn't find an answer to my questions that seems to be an issue...1 : during the power up diag, "==NG" is displayed in front of "BACK UP RAM" : what does that mean ? issue or not issue ?2 : How to replace the internal back-up battery ?Thank in advance !Thierry.

author: picburner
author_rank: Frequent Contributor
timestamp: June 10, 2020, 12:01:54 pm
content: The battery is located on the CPU board in the position indicated by the arrow.However, readthistopic because it would seem that there is a risk of losing some SA functionality by removing it without precautions.I don't have this SA and I can't help you more than that.

author: tconil
author_rank: Newbie
timestamp: June 10, 2020, 12:39:09 pm
content: Thanks !I read this topic. It concerns the R3131 and it seems that, for the 3132, things are not going in the same way... but I'm not sure ! I don't find the Maintenance or Service Manual of the R3132...What I found :Quote from: Fraser on July 16, 2015, 11:17:45 amAnd what about the displayed "BACK UP RAM ==NG" during the power up diag ? What means NG ? I think an owner of this R3132 do have the answer...Th.

author: picburner
author_rank: Frequent Contributor
timestamp: June 11, 2020, 06:28:45 am
content: If the message is like the one in the attached pic it would seem that the cause is a empty or almost empty battery.NG probably means Not Good

author: tconil
author_rank: Newbie
timestamp: June 11, 2020, 12:24:21 pm
content: Quote from: picburner on June 11, 2020, 06:28:45 amThanks a lot ! It's a pretty good news ! I intend to change the battery, as described above... not too difficult !
Defective BNC Tee - Page 1
Forum section: electronics / testgear

author: tkamiya
author_rank: Super Contributor
timestamp: June 10, 2020, 07:48:56 pm
content: I like using BNC Tee on everything, so that if I have to terminate it, or stick a probe on it, I can.This particular BNC did not mate. I know why now, but can you tell what's wrong with the adapter??

author: jadew
author_rank: Frequent Contributor
timestamp: June 10, 2020, 07:52:00 pm
content: Yeah, it's missing a key.Is that a brand name adapter or china direct?

author: tkamiya
author_rank: Super Contributor
timestamp: June 10, 2020, 07:57:22 pm
content: I don't see any marking on it, so I'd guess it's generic, probably from China.

author: cliffyk
author_rank: Frequent Contributor
timestamp: June 10, 2020, 11:13:40 pm
content: As has been put forth only one locking pin groove was milled into the collar. This sort of thing happens a lot with automated CNC production--doesn't matter in what country. Then it sneaked by QC. Though for most mass manufactured stuff we, the end users, are the QC...
Rohde & Schwartz FPC1000 Spectrum Analyzer 'gitch' - Page 1
Forum section: electronics / testgear

author: JohnPi
author_rank: Regular Contributor
timestamp: June 12, 2020, 06:08:50 am
content: I have an R&S FPC1000 SA. Under some conditions I notice an artifact step in the display at just about 1 MHz. This is not a function of the signals I put in -- in fact it also occurs with no input signal and just a 50 Ω connected to the input. I have seen this step as large as 10 dB in some cases.It seems this is somehow related to relative values of RBW and VBW settings, and/or the averaging mode, but I can't figure out what.Here is an example of no input, and (in this case a small step) a step is visible at 1 MHz (not precisely, generally 989 kHz).Any ideas on what is causing this ?

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: June 12, 2020, 06:17:34 am
content: When I just looked at the picture I thought it was something we see all the time in spectrum analyzers, though usually the other way round (sudden increases in noise-floor) usually when the analyzer mixer switches to a different harmonic. This might be similar, but more a case of an additional block needing to be engaged to measure below 1 MHz? some kind of upconverter?Is there a block diagram available of the FPC1000?

author: JohnPi
author_rank: Regular Contributor
timestamp: June 12, 2020, 09:50:31 pm
content: No block diagram available from R&S. I have contacted their tech. support; I'll see if they can explain what it is doing.One thing, while the SA is described a 5 kHz - 1 GHz, DANL (noise level) is only specified about 1 MHz. I hope it isn't horrible below that as that's what I'm most interested in...
Tekpower TP3005P - Quiet Time - Page 1
Forum section: electronics / testgear

author: VariousPickles
author_rank: Newbie
timestamp: November 11, 2018, 08:50:23 pm
content: I've recently gotten aTekpower TP3005Pprogrammable linear power supply and I've been quite happy with it, but practically each and every action or setting change elicits a joyous 100 decibelQuotefrom the supply.This is especially annoying when querying/changing voltage/current/etc settings via serial over the USB interface.I'm willing to void the crap out of the (brief) warranty by removing the buzzer, but could use some advice from any folks who have done something similar.The closest thing I've found so far is a reviewer briefly mentioning the presence of the buzzer in the non-programmable sister supply to mine:https://youtu.be/Nfe28vGW6Ik?t=1080

author: Jdub06
author_rank: Newbie
timestamp: April 22, 2019, 05:37:05 pm
content: The part he calls little buzzer will look very similar. Always plastic with metal visable through hole in top(probably through hole mounting as well). Find it unscrew board it's on. Put your finger on it as u hold it and flip board over, look through at your finger, see two solder points? You have an iron, solder and Flux right? Flux it get some leaded solder and melt some into each point. If they used lead free it 1)melts at higher temp 2)wont allow as long to remove 3)might be myth but old solder joints don't flow nice so let's just not take the chance. I'd bet if u can clip the board with buzzer down and do as I say it will drop right off after adding leaded and then put the iron on each point. Alternate rapidly... Point is make them both liquid at the same time. There is a solder called low melt alloy that gives u a lot more time and is great with ics and lots of pins. I doubt u will need it here but it would make life easier and if u are looking for a bit of kit buy some and you will have it left for next time. Hope you figured this all out on your own but incase the. Ext person...

author: Gyro
author_rank: Super Contributor
timestamp: April 22, 2019, 06:33:45 pm
content: Alternatively, a piece of tape stuck over the top, or pushing some Bluetack into the hole will bring the volume down significantly.

author: karamba
author_rank: Contributor
timestamp: June 10, 2020, 02:09:38 am
content: Just got the same power supply and totally understand. The loud annoying beep is the only negative so far of the power supply. I will stick in some chewing gum maybe :-)
GW-Instek AFG-2125 - White Noise? - Page 1
Forum section: electronics / testgear

author: DGP750
author_rank: Newbie
timestamp: June 09, 2020, 03:13:43 pm
content: Hopefully someone with greater knowledge cas help me?I have looked in the manual but cannot find the answer...Simply, can I get this Function Generator to produce White and/or Pink noise?I see the, "Noise" as a function and can select it but i'm stuck from there...

author: Mr. Scram
author_rank: Super Contributor
timestamp: June 09, 2020, 03:17:29 pm
content: Quote from: DGP750 on June 09, 2020, 03:13:43 pmCan you get other forms of actual output?

author: DGP750
author_rank: Newbie
timestamp: June 09, 2020, 03:22:20 pm
content: Quote from: Mr. Scram on June 09, 2020, 03:17:29 pmHello, yes, I have been using it for calibrating an old reel to reel tape recorder with the sine waves but I would like to tune the equalization by ear using some noise...

author: DrG
author_rank: Super Contributor
timestamp: June 09, 2020, 04:28:37 pm
content: Search for gw instek afg-2125 manual in "the google".Findhttps://www.phys.uconn.edu/~eyler/phys3150/R/Instek%20AFG-21xx%20user%20manual.pdfSearch for "noise" in the manual. Note wave form selection starting on page 36 (apparently you are already at that point - but including the link might encourage more knowledgeable people to weigh in - see below)). Futz with it for a while and pay particular attention to things like "The modulation, FSK, sweep and counter functions must be disabled before a standard waveform can be output." Go back to page 8 and make sure that all your settings are consistent with those limitations.Wait for someone who is smarter than me to give you the right answer.
Instek Oscilloscope Training Board - Page 1
Forum section: electronics / testgear

author: gfmucci
author_rank: Regular Contributor
timestamp: June 10, 2020, 12:32:28 pm
content: Is anyone familiar with or used this board from Instek? Decription says it is for 2000 and 3000 series Instek scopes. I'm wondering how useful it would be for Insteck 1000 series, or for any other brand scope. I've concurrently sent this inquiry to Instek.https://www.tequipment.net/Instek/GDB-03/Analog-Digital-Trainers/Manual download:https://res.cloudinary.com/iwh/image/upload/q_auto,g_center/assets/1/26/GDB3-GDS-2000A_0912_.pdfThe GDB-03 training kit allows you to learn both the basic and the advanced functions of the GDS-3000 Series Digital Storage Oscilloscope (DSO).Following the training procedures of this training kit, you will quickly understand the basic operations of a DSO, and the unique features of the GDS-3000 Series, which represents a typical hi-tech DSO today.The training kit is a signal generator board capable of producing waveforms, which contain various real-life scenarios you might encounter. With the GDB-03 training kit and the included curriculums, you are able to acquire adequate knowledge in using a DSO with advanced features.Demo BoardThe demo board is a signal generator board capable of producing waveforms which represent various real life scenarios you might encounter. You can use the board as a training kit to learn how to properly view signals, or use it as a generic signal generator.
Brymen Multimeter, Welectron Discount code. - Page 1
Forum section: electronics / testgear

author: WigramWay
author_rank: Newbie
timestamp: July 18, 2019, 08:31:14 pm
content: Hello all,My first EEV forum post, I was jus about to purchase a brymen BM235 multimeter when i stumbled across a forum post mentioning an eev blog member discount.As a broke student i very much appreciate any saving.Thanks in advance!

author: Simon
author_rank: Unknown
timestamp: July 18, 2019, 09:14:28 pm
content: How much are you looking to pay and where are you? I am the UK/Europe reseller for Dave.

author: WigramWay
author_rank: Newbie
timestamp: July 18, 2019, 09:18:39 pm
content: Hello, sorry for the confusing post, Im actually just looking to buy the generic 235 as I can’t justify the EEV blog, although it is tempting.Cheers,Eldon

author: WigramWay
author_rank: Newbie
timestamp: July 18, 2019, 09:19:17 pm
content: and im in scotland in the UK

author: bmdaly
author_rank: Contributor
timestamp: July 19, 2019, 07:29:20 pm
content: Hi Eldon,Email Marco Wünschmann at info@welectron.com before ordering - I'm sure he'll sort you out with a discount.I've used both "Marco Reps", and "EEVBlog" in the past to get a 5% discount. They also offer an additional 2% for up front cash payment, and free postage on orders over €500 (probably a little more than you want to spend right now though).

author: Simon
author_rank: Unknown
timestamp: July 19, 2019, 07:41:37 pm
content: I have sorted Eldon out for the same price (as a one off) and he get the classy EEVBlog look into the bargain.

author: chukin
author_rank: Contributor
timestamp: June 08, 2020, 07:03:07 pm
content: Hi folksJust a quick update in case anyone is interested: Having just bought a BM869s from Welectron, I can confirm that bmdaly's info is still correct and they offer free postage in the EU and Switzerland. I paid €175 (excl VAT) less 5% EEVblog discount after emailing and asking Marco Wünschmann. Delivery was 4 working days. I thought I had managed to avoid paying Swiss import duty and VAT, but unfortunately today I got a bill from DHL for this for CHF36. Still a good buy though.Haven't yet used the meter much but so far no problems and everything seems to work.I also had a minor administrative issue (my fault) which the Welectron guys sorted quickly and without fuss.Peter
Mitstronic DPS-20M  - Page 1
Forum section: electronics / testgear

author: electricspark
author_rank: Contributor
timestamp: May 21, 2020, 05:05:33 pm
content: I have been keeping an eye on eBay for a low cost differential probe and found the Mitstronic DPS-20M.I wonder if anyone has purchased one of these? At GBP100 including shipping for a new probe it looks like really good value (to a non-professional enthusiast).I would really appreciate an opinion.Thanks.

author: Didi
author_rank: Newbie
timestamp: June 08, 2020, 02:43:25 pm
content: Hi,also saw this one today and am curious.However, on the mitstronics webpage, you can download the manualhttps://mitstronic.com/Downloads/and it states the bandwidth to be 20MHz only. So the Micsig DP 10013 might be the better bang for the buck and it has already had some positive reviews...The flexible factor selection seems nice, though. But I'll probably wait unitl I see someone reviewing it.
Manual for a '70 era Green Absorption wave meter TG2600 - Page 1
Forum section: electronics / testgear

author: vk2jdh
author_rank: Newbie
timestamp: June 07, 2020, 11:29:41 am
content: Looking for a manual for a '70 era Green Absorption wave meter TG2600Thanks,Dave

author: vk2jdh
author_rank: Newbie
timestamp: June 08, 2020, 12:39:14 pm
content: Might also be know as sprite sp 2a3
HP Agilent E3615A Power Supply suddenly stuck in CV - 0 Volts and amps changing - Page 1
Forum section: electronics / testgear

author: Reprobyte
author_rank: Regular Contributor
timestamp: June 06, 2020, 09:47:30 pm
content: Hi, hoping that I can get some advice and this may be an easy fix. I have a E3615A which has had a wobbly front panel for years, so I took the lid off and fixed the broken plastic with epoxy and its now sturdy but now I have a strange behaviour.Now when I turn it on I cant get a voltage reading on the front. It is flashing the negative symbol -0.0 volts and the amps are jumping all over up to around 1Amp and back. Connecting wires together doesn't go into CC mode, stays in CVIs there something I could have messed up when I fixed the front panel, I checked and I cant see any damaged wires anywhereThanks for any advice as this is beyond my knowledge, it always just works for me.EDIT: seems to have just come back this second, but now I am wondering what the heck it was, hopefully it stays working!

author: Raindog
author_rank: Contributor
timestamp: June 07, 2020, 04:35:13 am
content: I purchased a Agilent E3630A off of ebay awhile back where the volt and amp meters were giving intermittent erroneous readings, the volt meter was showing -.11 volts at 0 volts and always showing about 20 MA on the ammeter, even with no load. The volt meter would also take about 10 to 20 seconds to stabilize on any voltage reading even though a external volt meter would show immediate voltage changes. My issue wound up being oxidized connectors on the wire harness going from the main board to the connector on the back of the display board. I just simply re-seated both ends a couple of times and it fixed the problem.Best Regards,Craig Petersen.

author: Reprobyte
author_rank: Regular Contributor
timestamp: June 08, 2020, 01:10:27 am
content: Thanks for your reply on this, I did look at removing the harness but it wouldn’t help get the panel off, I likely knocked it and got similar issues to you. Thanks for that info
Panasonic / National VP-7633P Manual - Page 1
Forum section: electronics / testgear

author: bap8guy
author_rank: Newbie
timestamp: June 07, 2020, 10:17:22 pm
content: I recently picked up a NP-7633P Multiplex Stereo Generator. I have pretty well exhausted myself on searches for a manual (or others close to it). Does anyone know of any sources for a user / service manual? Bruce
Iwatsu DS-9122 Oscilloscope - Page 1
Forum section: electronics / testgear

author: wn1fju
author_rank: Frequent Contributor
timestamp: June 07, 2020, 11:50:44 am
content: Does anybody have any information on this scope? There isn't much on the Internet that I can find. I would, of course, love a service manual, but I would be happy with sections of an op manual dealing with the calibration functions.From what I can see, it is a 100 MHz "digital" scope that real-time samples at 25 MHz () and employs the usual equivalent time sampling characteristic of scopes in the early 1990's.Picked the scope up for $30 USD. When I opened it up, I found little puddles of electrolyte near the SMT electrolytic caps. I pulled a few out and they tested only a few nF, so I surmise most of them are toast. Looks like the Iwatsu suffers from the same disease that my Tektronix TDS520 had. Forty new SMT caps are on the way. I did a preliminary scrubbing of all the boards, but until I pull the caps out, I can't see if there is any trace damage underneath them.Even with the bad caps, the scope pretty much works OK. It is apparent that the V/div settings need calibration and there is a menu item to do this - except it fails on the 50 mV/div setting and so aborts the cal. I do like, however, the built-in thermal printer. Build quality is superb, but the features of this scope lag a little behind the Tektronix models of the same date (1993).Will post a couple of pictures once I replace the caps.
Tektronix TDS6000B/7000B Series NVRAM dump script - Page 1
Forum section: electronics / testgear

author: flyte
author_rank: Regular Contributor
timestamp: June 09, 2020, 08:15:55 pm
content: Today I have been looking at a TDS6000B series scope. In the same spirit as the TDS5/6/700 series dump scripts, I've decided to write a small script which allows you to take a backup of the NVRAM and BIOS ROM on the PowerPC board.Proceed as follows:- In the c:\vxBoot folder (normally hidden, unhide if needed), rename the file topScript.hw to e.g. topScript-original.hw . Do not delete it!- Put the topScript.hw attached to this post in the c:\vxBoot folder- Restart the device- If you have a console port and the device is open, you can monitor it. Upon completion, you can enter the vxWorks shell!- After startup is complete, it will have created two files in the same folder: nvrdump.bin and biosdump.bin, which speak for themselves- Next, delete the dump script and rename the original back to the old namePlease note it is likely incompatible with the non-B series, as the NVRAM base address is different. If someone could run this on a non-B series 6000/7000 and send me the dumps, I can try to locate the correct NVRAM address for these models.
DE-5000 potentially broke? - Page 1
Forum section: electronics / testgear

author: eurekaiv
author_rank: Contributor
timestamp: June 05, 2020, 11:52:26 pm
content: Hi everyone, long time lurker finally registered and posting!I've had a DE-5000 for probably 4-5 years now and recently it has stopped recognizing capacitors of higher values. I know these are quite sensitive to a charge on the cap and I've been careful but I woulnd't rule out a slip-up. Is it possible I could have taken out a specific "range" in the meter ? It will still measure caps in the low uF range (I tried some 10s) but I have a 470 and 4700 that are reading open at all but the 100 and 120hz settings, and they're definitely not reading correctly at those settings either. I've replaced the battery (it was pretty low) but done no other troubleshooting as there's not much else I would know how to do. I know the caps are good as a I have a small little eBay component tester and a Fluke 117 on my bench that basically agree.

author: coromonadalix
author_rank: Super Contributor
timestamp: June 06, 2020, 02:43:22 am
content: HiHave you done the open leads and closed leads calibrations ?Check this in the user manual included in this thread attachment

author: eurekaiv
author_rank: Contributor
timestamp: June 06, 2020, 05:13:59 am
content: Yeah, forgot to mention that. I’ve calibrated and tried with both included probes and clips along with directly inserting parts.
PSA - Keysight U1270 Multimeter 25% discount on Keysight (USA only) - Page 1
Forum section: electronics / testgear

author: trevers
author_rank: Contributor
timestamp: June 05, 2020, 01:35:46 pm
content: Hopefully this does not break any forum rules. I am not affiliated with Keysight. While shopping for a new multimeter I discovered that Keysight USA is offering 25% off of the U1270 line of 10000 count multimeters. This saves almost $100 and includes free shipping.The code is '7.012'https://www.keysight.com/en/pcx-2832442/u1270-series-45-digit-handheld-multimeters?nid=-32044.0&cc=US&lc=engEdit - And that free delivery had it on my doorstep < 12 hours later from west coast to the east coast!
Diy siglent logic probe? - Page 1
Forum section: electronics / testgear

author: newbadboy
author_rank: Regular Contributor
timestamp: June 05, 2020, 10:24:19 am
content: Is it possible do make a Siglent SPL2016 probe? I recently purchased a scope and realized that it had the logic sowftware included but the probe is pretty expensive.is diy even possible and in that case where to find info?

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2020, 10:52:08 am
content: Member TK had a go at it here:https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/msg3079002/#msg3079002There's also earlier discussion about the SPL2016 LA probe in that same thread where I found very similar styles of LA probes are also used in other brands.
Which SA/VNA? NWT4000 or? - Page 1
Forum section: electronics / testgear

author: DeepLink
author_rank: Regular Contributor
timestamp: March 10, 2020, 09:58:13 pm
content: Looking for a "cheap" SA/VNA and found the NWT4000 which get some fair reviewsI see a version NWT4000-2 which starts at 35MHz (instead of 138MHz)But I would like it to be lowerAlso found a NWT4000-3 which starts at 50kHz, but I can only see this at one shophttps://www.thanksbuyer.com/frequency-sweep-generator-meter-50k-4-4ghz-network-analyzer-nwt4000-3-50468Anybody knows about this? NWT4000-2 or-3?Software?BTW - 4.4GHz is more than enough for meAny other SA/VNA to look for?

author: Bicurico
author_rank: Super Contributor
timestamp: March 10, 2020, 10:13:46 pm
content: Take a look at my blog - signature has the link.RegardsVitor

author: DeepLink
author_rank: Regular Contributor
timestamp: March 12, 2020, 08:32:56 pm
content: Vitor - yes I knew your site, but what about the NWT4000-3?Do you know anything about that version?Does your software support NWT4000-3?

author: hagster
author_rank: Frequent Contributor
timestamp: March 12, 2020, 09:17:39 pm
content: The nanoVNA is very good for the money. The version 2 promises to be even better.https://www.tindie.com/products/hcxqsgroup/nanovna-v2/I haven't seen any reviews yet though.

author: Bicurico
author_rank: Super Contributor
timestamp: March 12, 2020, 10:14:02 pm
content: It will certainly work as a regular NWT4000. I would have to adjust the frequency range and eventually the multiplier.Should be easy.

author: xzswq21
author_rank: Frequent Contributor
timestamp: March 25, 2020, 07:48:29 pm
content: Quote from: Bicurico on March 12, 2020, 10:14:02 pmHow much is the dynamic range of NWT4000-3?

author: virtualparticles
author_rank: Regular Contributor
timestamp: June 04, 2020, 09:02:37 pm
content: The NanoVNA does not make accurate measurements.A 12 dB return loss standard measures from -16 to -20 dB for S11 from low to high.S21 is similarly inaccurate. This is not a serious VNA. it is good for educational use.

author: OwO
author_rank: Super Contributor
timestamp: June 05, 2020, 07:18:12 am
content: Yes, the original Nano is only good to 200MHz or so, but V2 is a completely different tool:http://www.dd1us.de/Downloads/Brief%20comparison%20of%20NanoVNA%20V2%20with%20a%20professional%20VNA%20HP-8753E.pdf
Where to purchase Sapphire or Pintek differential probes? - Page 1
Forum section: electronics / testgear

author: magicsmoke
author_rank: Regular Contributor
timestamp: June 03, 2020, 08:49:40 pm
content: I am trying to purchase Sapphire (http://www.sapphire.com.tw) differential probes. Ideally the SI-9101 or SI-9071 models. Sapphire is the OEM for many oscilloscope manufacturer differential probes. Is it possible to buy directly from them and avoid the oscilloscope manufacturer overhead?Otherwise I am looking at the Pintek DP-35 differential probes. These appear to only be available in the USA for a low price ($254) from Global Media Pro who only accepts wire transfers. Has anyone purchased from them before?

author: H.O
author_rank: Frequent Contributor
timestamp: June 04, 2020, 05:08:19 am
content: I bought my Pintek diff.probe from GlobalMediaPro some years ago. Had zero issues with that transaction for whatever that's worth.

author: tautech
author_rank: Super Contributor
timestamp: June 04, 2020, 09:48:05 am
content: Without a country flag it's hard to give local advice for you but Google returns a few hits for Pintek DP-35.

author: magicsmoke
author_rank: Regular Contributor
timestamp: June 04, 2020, 03:44:40 pm
content: Quote from: tautech on June 04, 2020, 09:48:05 amI am in the USA.
Tektronix TDS3012B vs TDS3012B-NV - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: June 03, 2020, 09:35:26 pm
content: I see the ads and can't find the difference Googling and wonder if NV means non-volatile RAM. If so does a scope without the NV designation lose memory and if so how to get it back if lost and how not to lose itThanksHank

author: Jwalling
author_rank: Unknown
timestamp: June 04, 2020, 09:02:17 am
content: Quote from: wd5jfr on June 03, 2020, 09:35:26 pmThose were made under contract for the US military.

author: wd5jfr
author_rank: Regular Contributor
timestamp: June 04, 2020, 05:07:24 pm
content: Just found this on an eBay ad:"The TDS3012B-NV is basically the same as the TDS3012C but without the USB port and having the Floppy drive."Can anyone confirm this as fact as Tek.comhas no info on the NV model.ThanksHanK

author: snoopy
author_rank: Frequent Contributor
timestamp: June 05, 2020, 05:18:10 am
content: I've seen the NV postfix on other Tek scopes for sale on ebay such as TDS5054-NV etc. Sometimes the spec is nobbled for certain countries such as reduced sample rate from 5 Gs/s to 1Gs/s to meet the trade requirements of certain countries. Otherwise they appear to be scopes made to order for military and gov etc.cheers
3710A Battery test software - Page 1
Forum section: electronics / testgear

author: Grandchuck
author_rank: Super Contributor
timestamp: June 04, 2020, 09:16:05 pm
content: The software for the Array/Tekpower electronic load works but it would be nice to have better functionality for testing cells and batteries. My hope is to learn Python and PyVisa but that is going slowly along a bumpy road.Any hints for either?Python seems easy enough but no joy getting PyVisa working. Which Python are you instrument control folks using?
When did continuity testers become standard? - Page 1
Forum section: electronics / testgear

author: Owad
author_rank: Newbie
timestamp: June 03, 2020, 03:36:12 pm
content: When did audible continuity testers become common in bench multimeters? I'm looking at vintage Keithleys, HPs, and Flukes, and there aren't continuity testers on units of the vintage (and price) I was hoping for. Are there any vintage Keithleys with an audible continuity tester? Any vintage bench multimeters with it at all, that anybody would recommend?

author: Wytnucls
author_rank: Super Contributor
timestamp: June 03, 2020, 06:24:17 pm
content: Fluke 37 30$Fluke 45 300$

author: Wytnucls
author_rank: Super Contributor
timestamp: June 03, 2020, 06:46:43 pm
content: Philips PM2525 100$

author: Wytnucls
author_rank: Super Contributor
timestamp: June 03, 2020, 06:51:01 pm
content: Solartron 7063 300$

author: alm
author_rank: Super Contributor
timestamp: June 03, 2020, 09:47:10 pm
content: I think it started to appear early-mid eighties on handhelds (e.g. Fluke 8020B), then went up to the bench meters. You're more likely to find it in the entry level bench meters that might be used for servicing, rather than in the high-end ones mostly used for system applications. Not much point in having a beeper when all it's doing is hanging in a rack connected to a computer. So a HP 34401A will have it, but the HP 3457A will not.

author: Owad
author_rank: Newbie
timestamp: June 04, 2020, 04:55:14 am
content: Thank you both. I've been looking at 34401A's. I like the price of the PM2525's, though.

author: eevcandies
author_rank: Regular Contributor
timestamp: June 06, 2020, 07:58:48 am
content: Get a PM2535 ...has AC RMS readings , generally better specshttps://www.abletron.com/index.php?route=product/manufacturer/info&manufacturer_id=40(links to datasheets)

author: bluey
author_rank: Regular Contributor
timestamp: June 08, 2020, 11:47:18 pm
content: Quote from: alm on June 03, 2020, 09:47:10 pm100%. 8020A didn't have it from 1977-1984 and 8020B did in 1984.http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Fluke/FLUKE%208020B%20Instruction.pdf

author: Owad
author_rank: Newbie
timestamp: June 09, 2020, 05:40:46 am
content: Thanks, eevcandies and bluey.So I actually ended up with a Keithley 175. It was giving weird readings, but was cheap enough I figured I'd take a chance on it. Some contact cleaner seems to have solved all its problems.I am disappointed by the lack of continuity testing, though. I guess I'll either pull out my handheld meter for that, or maybe get something like probe master's 105 probe.
[Solved] TDS3012B can't update firmware - Page 1
Forum section: electronics / testgear

author: Galen
author_rank: Regular Contributor
timestamp: June 05, 2020, 02:58:08 am
content: Try to upgrade the firmware for my new acquired TDS3012B, from 3.36 to 3.39. make 4 disks for the V3.39, Insert the disk1 to scope, power on the scope. The scope started normally, but no software update prompt appear on the screen after the splash screen. Strange! OFF the scope, try again, Same result! But the file Save/Recall function works well when operate at the scope. The disk drive maybe good?After a while, I think maybe the Save/Recall function just run the disk drive, but doesn't check if there is a disk inserted? Maybe the small switch in the disk drive (near the door of the drive) fail? this switch is to detect if there is a disk inserted in the drive.So I open the scope and replace the disk drive with a new one. Insert the V3.39 disk1 in the drive, power on the scope, after the splash screen, the software update prompt appears. So completed the firmware upgrading.I will open the failed disk drive, to check the small disk detection switch.Put this here, I'm happy if it can help anyone who encounter this issue.
Agilent 54810A scope, possible ext ref? - Page 1
Forum section: electronics / testgear

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: June 03, 2020, 09:33:26 pm
content: Has anyone done anything to put in an external reference connection to the acquisition board in an Agilent 54810?? I have looked and cannot find anything on this, I suppose that tapping into the board around the oscillator might work. Maybe there are other tricks to do this.Thanks,Wally
Setting default gate time to 1s on HP53132A - Page 1
Forum section: electronics / testgear

author: tkamiya
author_rank: Super Contributor
timestamp: June 03, 2020, 04:25:02 am
content: I have a few HP53132A. Does anyone know how to set default gate time to 1s? By factory default, it comes up 0.1s. It takes few steps to change it to 1s. It becomes tiresome after a while....Thank you.

author: rf-messkopf
author_rank: Regular Contributor
timestamp: June 03, 2020, 02:36:52 pm
content: I don't think that's possible. In fact, Tables 2-7A and 2-7B in the manual say that the gate time setting is not stored in non-volatile memory. What you could do, however, is to store an instrument setting with the desired gate time using the save/recall function. Then you could bring that setting up with (I think) two keystrokes ( + ) after power-up if you save it in memory No. 1.

author: tkamiya
author_rank: Super Contributor
timestamp: June 03, 2020, 03:19:51 pm
content: I was hoping there was some secret way to change the default. I guess not. It seems save/recall is the only option.Thank you for the reminder.
Firmware for Atten ADS 1202CL+ - Page 1
Forum section: electronics / testgear

author: StDenits
author_rank: Newbie
timestamp: June 02, 2020, 06:20:39 am
content: Hello.I am looking for working software (EasyScope) for Windows (Win 10 x64) and firmware for the Atten ADS 1202CL+ oscilloscope.Information about o-scope system:Software Version: 3.01.01.31R16Hardware Version: 10-61-2.4Product Type: ADS1202CL +Can anyone share this?Thank you.

author: tautech
author_rank: Super Contributor
timestamp: June 02, 2020, 09:26:00 am
content: EasyScopeX should work and you can get it here:https://int.siglent.com/download/softwares/Be aware it needs the NIVISA Runtime package installed for the connectivity drivers.You need run it on Windows or in a VM.
House Find: Broken Mac Tools Fluke 77 II Multimeter - Page 1
Forum section: electronics / testgear

author: salvagedcircuitry
author_rank: Regular Contributor
timestamp: November 09, 2019, 08:43:49 pm
content: If a house includes a Fluke multimeter, does that make it a good house?I think soAfter sorting through various odds and ends, I found a MAC Tools ET77DMMA Fluke multimeter shoved in a very stuffed drawer of a parts.It looks like a 77 Series II. It's still kickin' but it's mighty off. It measured a 9v battery as 11.5vVisually, I do not see anything that looks bad, but this looks simple enough to troubleshoot. Hopefully I'll get her up and running ASAP

author: retiredcaps
author_rank: Super Contributor
timestamp: November 09, 2019, 10:17:38 pm
content: Quote from: salvagedcircuitry on November 09, 2019, 08:43:49 pmSuggestions.1. I see the 9V battery is dated Dec 2019. Is that a brand new never used battery? Dead or marginal batteries can give inaccurate readings.I routinely put old smoke detector 9V batteries in my meters especially the older Flukes since they can wring out every last bit of energy. However, when used 9V battery get below a certain threshold and BEFORE the low battery indicator comes on, sometimes I can inaccurate readings.2. Before touching any Fluke trimmer pots, do you have another multimeter that you can do comparison voltage measurements? For example, can both meters measure a 9V battery or ATX DC power supply at the same time?3. Do other functions like ohms work fine? If you short the probes, do you get 0.2 ohms? If you measure a 1k ohm resistor, do you get 1k?4. When you put the meter in VDC and short the probes, do you get 0.00V?

author: Joust
author_rank: Contributor
timestamp: January 09, 2020, 12:43:37 am
content: I would like to bump this thread.I recently dug up two of these old Gems i would like resurrect.i have a model 70 and a 23. both are part of the same Service Manual.i have said schematics if i can post it i am allowed. Fluke apparently sent it out.

author: retiredcaps
author_rank: Super Contributor
timestamp: January 09, 2020, 04:36:03 am
content: Quote from: Joust on January 09, 2020, 12:43:37 amStart your own thread and list the problems and I will then make suggestions. Tell us what works and what doesn't work. Post clear focused pictures as well.

author: Joust
author_rank: Contributor
timestamp: June 07, 2020, 04:58:58 am
content: moot....house burned downhave to buy all new meters now
Some lab instruments sound level measurements - Page 1
Forum section: electronics / testgear

author: DIPLover
author_rank: Regular Contributor
timestamp: June 02, 2020, 08:55:45 am
content: I thought I would share with you some sound level measurements I have taken in my quiet basement lab over the years.Please note the levels have not been obtained with a calibrated instrument, so the absolute levels are rather worthless. But I have been careful to always use the same device (an old iPhone 4 I keep only for this purpose), running the same software (SPLnFFT), while positioned in the exact same spot and orientation, so RELATIVE levels should be meaningful.All measurements are db(A).Room background with everything turned off : 28.0mac mini 2018 running at low load : 29.7HP Z820 workstation idling with fans set to lowest speed : 36-39Logic Analyzers :HP 1663C : 39.5HP 1670G : 48.2HP 16700A : 52.2HP 16700A refitted with Noctua high static pressure fans :42.5 peak, 40.0 idleOscilloscopes :Tektronix 2213: high pitched whine, otherwise silentTektronix 2265 (original model with auto fan speed) : 37.5Tektronix TDS744A : 43.2Rigol DS2072A : 38.0Rohde & Schwarz RTC1002 : 29.8Others :HP 5345A counter : 56.0 (a real monster this one!)Siglent SDG 2042X ARB : 31.4Obviously the fanless instruments are normaly silent. It's why I prefer my old brown Keithley DMMs to newer models.The siglent 2042X dominates the soundscape when just the mac is running while the RTC1002 I cannot detect, so a difference of 1.5 db is clearly audible.What are your experiences soundwise with your gear? Is your lab quiet or noisy?

author: Berni
author_rank: Super Contributor
timestamp: June 02, 2020, 09:24:08 am
content: Sound level dB are not really a complete picture of how noticeable a sound is.Gear that produces a more white noise like sound is much less noticeable than something that makes a high pitched whiny fan noise.But yeah a lot of big boat anchor test gear has loud fans in it, so i have replaced quite a few fans in it. Sometimes the bearings are shot in a fan, other times the fan is way overspecced for the job because the thing is designed to run stuffed into a full tight hot rack with poor ventilation. So sometimes just slowing the fan down helps a lot with the noise. I even had a case where flipping the fan around made a big difference to the noise (Objects near the fan blades can make them sing as they pass by). Of course when doing this i would make sure there was still adequate cooling by checking temperatures and running things like PSUs at full load for a long time.Its possible to make a PC near silent with some nice cooling upgrades, but test gear nope. Just turn up the music louder when working with test gear (I like to have background music when working).
What is this self-made piezo sensor actually measuring? - Page 1
Forum section: electronics / testgear

author: Xanthippe
author_rank: Newbie
timestamp: May 31, 2020, 09:25:06 pm
content: Hello everyone,I made a primitive "sensor" by soldering a small piezo to a set of wires connected to a BNC connector and pluging them into an oscilloscope. Photo included.My objective was to detect ultrasound waves under water to get a better understanding of the acoustic field, similar to a hydrophone.And at first my oscilloscope showed a periodic sinusoidal wave when I would dip the piezo into water with a transducer nearby.But then i accidentally put it on the optical table and I saw another wave appear. It turns out that only when I hold the piezo in air, there is a flat line. As soon as it touches skin, liquids and metal objects a wave appears.I am not sure what actually is being measured here.It can't be temperatur, because the optical table and the water had the same temperature yet their waves didn't resemble.Some weak waves would also appear when I would whistle near the piezo but they were nowhere as defined and as periodic as when the piezo would come into touch with an object. However no waves would appear when i put the piezo on plexiglass.I am confused. Does anyone understand this?

author: langwadt
author_rank: Super Contributor
timestamp: May 31, 2020, 11:18:35 pm
content: the mystery wave wouldn't happen to be exactly 60Hz ?

author: cdev
author_rank: Super Contributor
timestamp: June 01, 2020, 01:03:37 am
content: Its a mechanical sensir, i.e. a microphone. There also meay be some conductivity inherent to skin and ground loops.
Circuit tester OS-2030 oscilloscope - Page 1
Forum section: electronics / testgear

author: Njord
author_rank: Contributor
timestamp: May 31, 2020, 10:01:00 pm
content: Circuit tester OS-2030This oscilloscope popped up on a local buy/sell and I rushed out to get it. It seems basic and old but it was new in the box still wrapped up. The seller said the local university was giving them away to staff now that they use digital scopes. I wish it had some features of newer scopes (FFT, screen capture, subtract/math functions) but in all reality it should be just fine for my hobbies.Has anyone used this before and is there any tricks or tips I should know that is specific to the scope?How old is this thing? Google has pretty limited results.Is this scope accurate and reliable? I’m assuming so as the university bought them.Does anyone have the manual?Tell me what you think!

author: Specmaster
author_rank: Super Contributor
timestamp: May 31, 2020, 10:41:14 pm
content: The answer to your questions about the manual(s) and is it accurate is yes. The actual scope is made by a company called Pintek in Taiwan , and they are / were widely sold by other companies who effectively badge engineered them and had manuals printed with their company names and logos on them. Would I buy one like you did for $80, well yes, I did that a couple of years ago but have since moved on from them onto other scopes with more bandwidth, but in reality, here is nothing wrong with 30Mhz bandwidth, certainly more than enough for a beginner and or audio work.If you PM me with your email address then I can email you back all the information I have on this family of scopes including a service manual. I emailed the factory in Taiwan and asked if they had a service manual, and they very kindly emailed me back with one.