hybridfree/eevblog-posts huggingface dataset:
IFR FM/AM-1200 Checksum Error - Page 1
Forum section: electronics / testgear

author: KY5Q
author_rank: Newbie
timestamp: September 21, 2017, 08:38:20 pm
content: I just acquired an IFR FM/AM-1200. It is an older unit, still with the 8031 class processor. When I power it up, it gives me a "Checksum Error" followed by a "Memory RESET", where it will stay until I tell it to do something else. I can go into the keyboard and command a frequency, monitor, etc and so far all that seems to be OK. It has generator, spectrum analyzer and receiver functionality.I replaced the battery on the CPU card. I still have the check-sum error.I read something about the EEPROMs failing after years of age, so I am willing to update the firmware, if I could find the firmware. My system has 1 EEPROM, but it has space for two. I am assuming different firmware loads enables certain options.If someone has a unit and can read the EEPROMs, and send me the files, I can blow a new set of EEPROMs. Of if anyone has a presumed working CPU board from a junker, I'd look at this too. I am trying to get this fixed up to get to a high school that is working on a STEM CubeSAT project.Ideas? Regards, Bill KY5Q
Picked Up a Tek 465 ... minor issues and preventative maintenance questions - Page 1
Forum section: electronics / testgear

author: scdreger
author_rank: Contributor
timestamp: September 21, 2017, 05:33:04 pm
content: Hi All,I picked up a tek 465 in very good condition this weekend from a local Craigslist ad. I picked it up for a good price (I think) and it's working well, voltage reading is accurate using both inputs, but there are a couple small issues:When displaying two signals using "alt," if the two signals are positioned overlapping everything looks great, if I use the vertical position knobs to create separation between the two traces, they go quite dim and I have to increase the intensity significantly to see them again. Not sure if this indicates a malfunction. I should also mention that changing the trigger coupling has an affect on this (i.e. when I flip the switch to LF reject it displays much better, if I'm AC coupled, it's at its worst).Also, the 10X button doesn't seem to work unless I hold it half pressed down -- I'm going to try some contact cleaner and see if that resolves it.I also wonder if there's some preventative maintenance I should do, such as replace some caps that have proven to be prone to failure, etc.Any ideas welcome, thanks!

author: David Hess
author_rank: Super Contributor
timestamp: September 21, 2017, 07:17:59 pm
content: Quote from: scdreger on September 21, 2017, 05:33:04 pmThis is caused by selecting the normal trigger source when alternate vertical mode is selected; when alternate triggering is used, the waveforms must overlap on the CRT for proper operation. Select a different trigger source, usually channel 1 or channel 2, to resolve it.QuoteUnneeded maintenance like replacing the aluminum electrolytic capacitors risks causing damage.
Siglent SDG2042X bug on SYNC output - Page 1
Forum section: electronics / testgear

author: W7NGA
author_rank: Regular Contributor
timestamp: September 18, 2017, 05:42:23 pm
content: 2.01.01.23R5Greetings all ... just purchased a Siglent SDG2042X and SSA3021X spectrum analyzer. I have stumbled on what is surely a bug in the Modulation section. When active, the SYNC function on the Aux Out connector should output a 50ns pulse at the AM modulation frequency. It does so until the carrier frequency exceeds 10 Mhz and then an error message is displayed 'Cannot output a SYNC signal larger than 10 Mhz' and SYNC is then disabled. The SYNC pulse is at the modulation frequency well below 10 Mhz. It would appear that the limit checking routine is flagging the carrier and not the modulation frequency. This is a bug. I use similar generators that behave correctly.Other annoyances are the limits on the SYNC output. It is not available for BURST modes and I would have loved to see a MARKER function during SWEEP operations that pulses as the sweep passes thru the MARKER frequency when using internal triggering. Of great value when sweeping filters.Perhaps I can somehow pass on my observations to Siglent?W7NGASeaside, Oregon

author: Unknown
author_rank: Unknown
timestamp: September 18, 2017, 06:41:25 pm
content: Hello,I am checking with the factory on this.I'll let you know what I find out.

author: Unknown
author_rank: Unknown
timestamp: September 21, 2017, 05:55:11 pm
content: Quote from: Siglent America on September 18, 2017, 06:41:25 pmWe have passed this on to the engineering manager for this model.
Rack mounts for HP DC power supplies? - Page 1
Forum section: electronics / testgear

author: jkrbasu
author_rank: Contributor
timestamp: September 19, 2017, 01:18:38 am
content: Hey EEVbloggers!I've acquired a number of HP 6632B DC power supplies and am using them to build a multi-channel battery cycling station.My questions is- Does anyone have a part number or any recommendation for how to rack mount these power supplies?Thanks!

author: shteii01
author_rank: Frequent Contributor
timestamp: September 19, 2017, 01:26:24 am
content: Keysight website might have reference materials where part number is listed.Another way to get part number is to download HP catalogs from that time period.

author: bd139
author_rank: Super Contributor
timestamp: September 19, 2017, 06:59:10 am
content: I think you can wedge them on a standard rack shelf. I very much suspect the original rack mounting kits are unobtainium now.

author: duak
author_rank: Super Contributor
timestamp: September 20, 2017, 08:59:32 pm
content: I see the hp 6632B was only recently discontinued. The rackmount kit is Keysight #1CM002A - looks like it could be duplicated if the originals are too expensive.Here's an idea: One of my neighbours was scrapping his fridge so I grabbed the shelves and standards as they're big enough to hold equipment about the size of the above hp supply. My plan is to attach them to the wall in my shop so I can have rear mounted cantilevered shelves for stacking my test gear.Cheers,

author: gslick
author_rank: Frequent Contributor
timestamp: September 20, 2017, 09:26:44 pm
content: Keysight Model 66332A Dynamic Measurement DC SourceKeysight Models 6631B, 6632B, 6633B, and 6634B System DC Power SuppliesUser’s Guidehttp://literature.cdn.keysight.com/litweb/pdf/5962-8196.pdfTable 2-1. Options1CM Rack mount kit (p/n 5062-3974)1CP Rack mount kit with handles (p/n 5062-3975)Accessory Rack slide kit (p/n 1494-0060)There are several on eBay, for example a new in shrink wrap 5062-3974 kit for less than $30 shipped:http://www.ebay.com/itm/HP-Agilent-5062-3974-3-469-rack-mount-kit-for-use-without-handles-NEW-/172846752530
Maynuo M9711 and its BNC - Page 1
Forum section: electronics / testgear

author: kverti
author_rank: Newbie
timestamp: October 02, 2016, 07:51:03 pm
content: Hi folks! always happy to read this cool blog, but now I got a question. I'm now exploring my Maynuo M9711 features, anyone use its BNC output? The manual says: BNC Out connector for 0-full range current, that corresponds to 0-10V output.An oscilloscope can be connected here to view dynamic waveforms. Ok, I hooked up the front panel output to ch.1 (yellow); BNC output to ch.2 (blue). What's coming out of the bloody BNC? How in the world it can be useful?

author: swgertsch
author_rank: Contributor
timestamp: September 19, 2017, 04:30:50 am
content: Have you programmed the device to pulse the load?You might find the video:helpful (begin watching at minute 46).
New (?) Rigol scopes (DS2102E and DS2202E) - Page 1
Forum section: electronics / testgear

author: Gabri74
author_rank: Regular Contributor
timestamp: September 21, 2017, 06:00:33 pm
content: Just received an email from TEquipment about two new (?) rigol scopes (see screenshoots attached).647$ for the 100MHz version, 847$ for the 200Mhz version.Copy pasted from the email:1GSa/sec on all channels provides full 5X oversampling all the timeFree Serial Decode/Trigger supports most of today's common standards28M Record Length on all channels enables long captures to find elusive problemsVibrant 8 Inch Intensity Graded Display provides easy observation and analysisWaveform Record/Capture, Advanced Math, and 17 trigger typesFree decoders...It seems that Siglent has shaked a little bit the market :-)

author: Gabri74
author_rank: Regular Contributor
timestamp: September 21, 2017, 06:07:20 pm
content: Datasheet and specifications:https://beyondmeasure.rigoltech.com/acton/attachment/1579/f-07a5/1/-/-/-/-/DS2000E_specs.pdfhttps://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0790/1/-/-/-/-/DS2000E_DataSheet_EN.pdf

author: thm_w
author_rank: Super Contributor
timestamp: September 21, 2017, 11:24:47 pm
content: The specs are identical to the DS2000A, so it seems they have only added the free decoders and changed the Rigol logo yellow to blue.I guess it makes sense to create a new part number to avoid confusion with the old one.

author: H.O
author_rank: Frequent Contributor
timestamp: September 22, 2017, 04:56:42 am
content: > The specs are identical to the DS2000A...Not quite. In dual channel mode they're similar (or perhaps even identical) but in single channel mode the A-model is a bit different.In dual channel mode they both sample at 1GSa/s but in single channel mode the DS2000A can sample at 2GSa/s. Both mopdels can get you 28Mpts per channel in dual channel mode while only the A-model can give you 56Mpts in single channel mode.There's another thread on the subject:https://www.eevblog.com/forum/testgear/rigol-ds2000e/

author: Gabri74
author_rank: Regular Contributor
timestamp: September 22, 2017, 07:27:48 am
content: QuoteOps, missed it, sorry for double posting on the same subject.
Using an older Tek probe with a newer Tek scope - Page 1
Forum section: electronics / testgear

author: andyturk
author_rank: Frequent Contributor
timestamp: September 16, 2017, 01:10:07 am
content: Has anyone here used a Tek P6247 differential probe with an MDO4000/MDO3000 scope?I'm trying to use one of these probes via a TPA-BNC adaptor with a MDO4034B. The probe basically seems to work, but the scope doesn't recognize it. The probe select menu for the channel with the TPA-BNC gives me lots of different probe choices, but none are specifically for the P6247. The Tek support people say it should be recognized, but I don't think they've seen that particular combination personally.To get the P6247 to work, I have to choose one of the probes from the menu that uses 50 ohm termination. With that, the P6247 seems to return a signal with the correct amplitude (using the probe compensation port as a source). However, the scope thinks it's talking to something else and I don't know if that's going to cause a problem.

author: alm
author_rank: Super Contributor
timestamp: September 16, 2017, 09:10:20 am
content: Given the age of the P6247, I doubt it will communicate anything beyond attenuation factor and input impedance to the scope. It might even still use resistors to indicate this. So as long as the scope gets these two things correct, I would not be too worried. It is not like the probe has DSP correction factors stored.

author: andyturk
author_rank: Frequent Contributor
timestamp: September 18, 2017, 03:08:01 pm
content: For whatever reason, the probe started talking to the scope. I'm not sure what changed, but it felt almost like a software issue rather than some scratchy electrical contact.At any rate, the scope detects the probe directly. It reads the position of the attenuation switch is set on the probe and the DC offset can be set via the scope controls.
Rigol DP821... Good high Amp PSU ? And do the 'upgrades' work same as the DP832 - Page 1
Forum section: electronics / testgear

author: ozadr1an
author_rank: Newbie
timestamp: September 17, 2017, 09:28:40 pm
content: Hi All,I'm about to consider getting the DP821, because I often need a bit more than 3A. Does the usual .ca site key's work the same on upgrading the DP821 ? It unfortunately only lists the DP832 specifically, and searching around, I can't find any details on the DP821..Any tips, pointers, or experience from other 821 users much appreciatedThanksAdrian
Agelent 82357B clone "ceryificate" type? - Page 1
Forum section: electronics / testgear

author: innkeeper
author_rank: Unknown
timestamp: September 17, 2017, 02:21:05 am
content: I've got an HP 3562A DSA and a HP 8560A Spectrum Analyzer that id like to at least be able to capture the screen data using KE5FX GPIB toolkit 7470.exe plotter emulator and perhaps any other tools i can get to work via the GPIB port the more the better, but no specific need, just anything additional is icing on the cake.I've seen the AGILENT 82357B clones on ebay in the 75-85 USD range - You know them if you have ever searched them, there very pervasive ... there the ones with the pictures with a gen-u-ine "Functional Test Ceryificate" with themI'm obviously trying to do this on the cheap, but don't wanna end up with something that is useless.Is there any back experiences with these? any reason NOT to get one of these that anyone knows of?

author: gslick
author_rank: Frequent Contributor
timestamp: September 18, 2017, 04:52:58 pm
content: Quote from: innkeeper on September 17, 2017, 02:21:05 amhttps://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib-usb-adaptors-on-ebay-the-real-deal/
Keysight U1733C LCR meter determining equivalent circuit of components - Page 1
Forum section: electronics / testgear

author: taydin
author_rank: Frequent Contributor
timestamp: September 17, 2017, 09:18:17 pm
content: I am in the market to get a U1733C LCR meter, but looking at the manual and the videos I was able to find on youtube, it isn't clear whether this meter can calculate the equivalent circuit of a capacitor. Basically, breaking down a real inductor into an ideal inductor, ideal capacitor and ideal resistor. Here is a video of a fluke PM6303A which is doing this very nicely.The U1733C seems to display the equivalent circuit, but it seems to be just to show what measuring mode is active. It isn't clear whether the values of the ideal parts is available. So I'm curious, will the U1733C be able to find the values of the ideal components making up the real capacitors and inductors.
Item on eBay. I would like to know if its worth going for.  - Page 1
Forum section: electronics / testgear

author: Falcon_II
author_rank: Newbie
timestamp: September 16, 2017, 03:16:46 pm
content: Hi I have found this on ebay in the Uk and dont know if its a good make bad make or even worth it. First scope purchase.http://www.ebay.co.uk/itm/Gould-Oscilloscope-DSO-420-/192304977368?hash=item2cc64515d8:g:casAAOSwHm5ZuDshI am also watching this onehttp://www.ebay.co.uk/itm/Tektronix-TAS475-analogue-oscilloscope-100MHz-4-Channels-/272843995141?hash=item3f86c4f805:g:CJoAAOSwbURZt52Gwhich is very local to me.any advise would be appreciated. got a very small budget.

author: rstofer
author_rank: Super Contributor
timestamp: September 16, 2017, 05:34:46 pm
content: The seller of the Gould seems to be a standup guy in terms of return policy. But it's only a 20 MHz scope and that just isn't enough unless you limit yourself to audio. It might not give a good representation of a 4 MHz square wave as it could only include the 5th harmonic. Not bad but 4 MHz isn't much.Any time you can get 4 channels and 100 MHz of bandwidth, you are getting into a reasonable arena. That's essentially the specs of the Rigol DS1054Z. They're not equal scopes by any means but the channels and bandwidth are good things to have.It would be ideal if you could pick it up. Bring test leads and a signal source (or use the source on the scope).

author: bd139
author_rank: Super Contributor
timestamp: September 16, 2017, 07:00:59 pm
content: Don't touch the Gould or the TAS475. Complete bastards to repair. If this is your first scope purchase and your budget is low, go for a quality analogue unit with 50MHz or more bandwidth. You don't want to take on the complexity of a digital scope unless you can afford to buy a new one with a warranty (and then get a Rigol as mentioned).This is a really nice auction from a respectable seller who I have used before:https://www.ebay.co.uk/i/292245385388I have one of these which is my daily driver scope:https://www.ebay.co.uk/i/122697662787Also keep an eye on gumtree.com for scopes. I've picked up 50MHz analogue scopes on there for a tenner before that are working.Edit: if I was on a very tight budget I'd probably make an offer of £35 on this:https://www.ebay.co.uk/i/253109392746- if it's completely fecked they will give you your cash back. If there's anything even slightly wrong they will give you some cash back. Good seller.£1 = 1MHz is the rule

author: Fungus
author_rank: Super Contributor
timestamp: September 16, 2017, 07:06:20 pm
content: That's some sort of weird digitally controlled 'scope (no twisty knobs).It might have its specialist uses but as a general purpose scope I'd avoid it. Even DSOs still get twisty knobs.
AC Socket Tester and Isolation transformer - Page 1
Forum section: electronics / testgear

author: spudboy488
author_rank: Regular Contributor
timestamp: September 12, 2017, 08:05:06 pm
content: I need to put together a tester to verify the wiring of a relay circuit to switch 120VAC. I was going to use one of those AC Socket Testers (the ones that verify ground/load/neutral connections) as the check on the output side. For safety, I was going to use an isolation transformer on the input side. The ground is common and the input is obviously isolated from the output. Before I spend the $$ for the transformer, can someone here verify that a socket tester will work in this configuration?120VAC -> Isolation Xfmr -> Relay contacts -> 120VAC Socket TesterCommon ground throughout.Thanks.

author: ez24
author_rank: Super Contributor
timestamp: September 12, 2017, 08:48:46 pm
content: I saw a YT video where he disconnected the ground wire inside the transformer to make it a real isolation. Sorry I cannot remember the video. I think using a 3-wire isolation transformer leads to false sense of security because of the grounds. In his video he showed the danger. I think it was by a member. Occasionally I bid on a 2-wire isolation transformer so I do not have to disconnect wires. This will be a topic for the YT ListI am always on the lookout for a topic.Maybe someone remembers the video.

author: jh15
author_rank: Frequent Contributor
timestamp: September 16, 2017, 05:30:40 am
content: Did that also lift the Faraday shield to the core?

author: David Hess
author_rank: Super Contributor
timestamp: September 16, 2017, 02:13:49 pm
content: It will not work unless ground is passed through and neutral on the isolated side is connected to ground. I tested it on mine and it showed "open ground" whether ground was connected or not because neutral was not grounded. The neutral indicator was lit and the ground indicator was flickering.
Help on buying owon XDS3104E worth it ? 8bit or crap - Page 1
Forum section: electronics / testgear

author: dssence
author_rank: Regular Contributor
timestamp: September 15, 2017, 09:31:17 pm
content: My friends thanks for letting me be here again, need some help I was about to get my 4 channel oscilloscope 100mhz from owon. XDS3104E but something making me think about it is it's 8bit vertical resolution. I also sent an email to owon asking the following. As I had into my mind Rigols DS1104Z and UNI-T ultra phospor UPO2104CS.Email sent to owon, I was also thinking on buying lab supply from owon ODP3063 , what do you think?Does owon XDS3104E have the same technology displaying waveforms with multi level gradient like rigol ?What about Realtime waveform Record,Replay, function ?What's the maximum bandwidth analog? and sample pointscan you please detail more information about realtime waveform record ? editing ? is that possible?.Last I need if you can please confirm the following lab power supply ODP3063 is linear supply. If it does show the amperage consumption on display for detecting shorts in circuits. Has Shortcircuit protection.While you use total amps in parallel (you can use 12 Amps in total right?) you still have short circuit protection, and can you see the amperage consumption being consumed by a circuit on display in realtime?Real Time Waveform Record and replay does it have that functionality (up to how many frames ?.Thanks in advance.does this also apply for XDS3104E ? Magnifier functionhttps://www.youtube.com/embed/ts_TbeFlPHI
DY294 transistor tester – modifying and teardown - Page 1
Forum section: electronics / testgear

author: nikifena
author_rank: Regular Contributor
timestamp: September 15, 2017, 10:53:26 pm
content: Hi group. I have this tester for over 5-6 years, and I use it as a two pins component checker mostly but doing this require to put small wires inside the collector and the emitter sockets which is not the best idea. So I desided to install standard 4mm banana jacks for 2 component measurement.The job is nothing fancy – just put two connectors and solder them the collector and the base pins.This unit is just a little bit "how ya doin" inside but it works well. The PCB is rev. 15Niki
Free---Micsig tablet oscilloscope TO1000 series German language - Page 1
Forum section: electronics / testgear

author: Micsig_support
author_rank: Regular Contributor
timestamp: September 15, 2017, 10:10:38 am
content: Dear customer,Our German language is available right now. It is free to upgrade right now. if you need, please contact us or our distributor to get it right now.you can leave your SN here, or email us sales@micsig.com, america@micsig.com.And new function of APP (Andorid and iOS) is available too, please go to our website or App shop to get it.https://www.youtube.com/embed/Iha74VzYEaEMicsig support.
[GONE] FREE for the taking, Tektronix 475A. pick-up only in MA USA - Page 1
Forum section: electronics / testgear

author: Jwalling
author_rank: Unknown
timestamp: September 14, 2017, 07:29:48 pm
content: Picked this up today along with a TDS754A that needs repair, both units were free!First one to ask in this thread gets the 475A. Powered on only, I'm not going to test it for you too.Nice bright sharp traces (note where the intensity setting is). Comes with the P6106 probes as well, though one of them seems a bit flakey when you wiggle the BNC end.Pick up only, about 20 miles south of Worcester MA USA.Good luck!Edit: forgot the damn pics!EDIT2: Please. I don't want to see this end up on Ebay. I will only give it to someone that will USE or NEEDS it.

author: bd139
author_rank: Super Contributor
timestamp: September 14, 2017, 08:38:42 pm
content: I am wondering why I live in the UK at this moment in time. Good luck to whoever gets it

author: tggzzz
author_rank: Super Contributor
timestamp: September 14, 2017, 10:23:11 pm
content: Is there a local Hackspace or Makerspace?No, I'm not going to give my 475+DM44 to my local Hackspace - they already have too many scopes

author: bd139
author_rank: Super Contributor
timestamp: September 14, 2017, 10:56:57 pm
content: Let me know if you ever want rid of it. I don't have enough scopes yet

author: Sceptre
author_rank: Regular Contributor
timestamp: September 15, 2017, 01:37:54 am
content: I would like this scope, please. I have a few other scopes, but they are non-functional. The 475A will help me make headway on my repair queue. Should it become surplus to me, I will pass it on to someone else who can use it.I'm about 50 miles away, so could readily pick it up.Thanks!

author: jh15
author_rank: Frequent Contributor
timestamp: September 15, 2017, 05:22:04 am
content: Are you the winner?If not dibs.Would be fun on way back to run it on an inverter while supercharging my model s.In Maine with friends in MASS and NH to visit.(have to hide it in the frunk, might get put away for TEA or GAS)My hackerspace could use it, I use my 465 for now there.

author: tggzzz
author_rank: Super Contributor
timestamp: September 15, 2017, 08:07:38 am
content: Quote from: bd139 on September 14, 2017, 10:56:57 pmPM sent

author: Jwalling
author_rank: Unknown
timestamp: September 15, 2017, 09:17:17 am
content: Quote from: Sceptre on September 15, 2017, 01:37:54 amWe have a winner! I'll send you a PM in a bit.
Electric Vehicle and Test Equipment Pricing - Page 1
Forum section: electronics / testgear

author: Electro Fan
author_rank: Super Contributor
timestamp: September 13, 2017, 01:07:09 pm
content: https://qz.com/1074721/tesla-intentionally-makes-some-of-their-cars-worse-and-its-good-for-everybody/Tesla, whose CEO Elon Musk has described the company’s car as a “sophisticated computer on wheels,” is much more like a software firm than other auto makers. It makes sense that they follow a similar pricing strategy.

author: rstofer
author_rank: Super Contributor
timestamp: September 14, 2017, 05:44:19 pm
content: Standard business practice in the mainframe world. Amdahl, among others, had a switch. If you wanted to go fast for some period of time (monthly reports?), you clicked the switch and the speed, and rent, went up. When you didn't want to pay for the speed, you turned it off. IBM had similar schemes.I don't know that the additional mileage was all that helpful. Range anxiety is one of the limiting factors in battery car adoption. On its best day, my Chevy Bolt might go a little less than 200 miles while my Chevy Silverado will probably go 400 miles and there are gas stations all over the place and refueling only take a few minutes.Still, I really like the Bolt!

author: JPortici
author_rank: Super Contributor
timestamp: September 14, 2017, 06:11:24 pm
content: Not really news.. many cars have two variants of the same model that are actually the same exact car (everything under the hood is the same) except for the ECU maps.If you pay more you get more horsepower, torque.. but you also pay more taxes.
B&K precision programmable IC tester model 560 - Page 1
Forum section: electronics / testgear

author: PA4TIM
author_rank: Super Contributor
timestamp: September 14, 2017, 01:58:38 pm
content: I did a little teardown and demonstation of my 560 on my website;http://www.pa4tim.nl/?p=5964. The short demo is on my youtube channel :https://youtu.be/4dd-BCJGP14I repair a lot of gear that has a lot of logic IC's so I really use it.I read there was PC software for it (running under DOS probably) Does anybody has a copy of that. As I understand it correct you can use that to add new IC's to the library. Mine is version 3,.1 and has to user programmed eeproms but I have not yet looked what is inside them.
complaints about Tektronix TBS2000 series - Page 1
Forum section: electronics / testgear

author: peter198400000
author_rank: Newbie
timestamp: September 14, 2017, 07:58:18 am
content: some defects of TBS2000 series:1. The "ink saving" function,an helpful function for waveform saving and printing,is in no use;2.no switch between frequency(Hz) and period(s) with "cursor" function;3.the max. value of offset,when set 500&1/DIV.,can only be 8/DIV(while others can be 10/DIV);4.the max. value of voltage,with x10 volt. probe,can be only 50V/DIV,While,others can be up to 100/DIV,this makes the max volt. measuring value can only be 190Vac,while,others can be over 300Vac;5.the last time,measuring value is disappeared,when power on,next time.which brings more inconvenience.So much for this,if more,will be added next time.

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 14, 2017, 08:39:19 pm
content: This TBS2000 scope is just weird.https://www.eevblog.com/forum/testgear/new-tektronix-tbs2000-oscilloscopes/
Tektronix AFG3000 series upgrades to B and C - Page 1
Forum section: electronics / testgear

author: ruairi
author_rank: Frequent Contributor
timestamp: September 11, 2017, 11:44:43 pm
content: Hi all,I've found a Tektronix AFG3102 100MHz Arb Gen locally at a fair price and I'm considering it. I'm having a hard time locating information on exactly what was upgraded in the B and C revisions of this series. I found one post from Alan W2AEW where he mentioned a better screen but that's about it.https://www.tek.com/datasheet/afg3000-seriesAny thoughts?Looking at the data sheet it's interesting to me how the distortion performance is worse on the higher spec models, not a problem for my application.Cheers,Ruairi

author: effectivebits
author_rank: Contributor
timestamp: September 12, 2017, 01:27:50 pm
content: As far as I know, there was only 1 AFG3000 "B" model, and that was the AFG3021B/AFG3022B. I think the change was for the maximum voltage output. All other models went direct from no letter to the C model. From a user perspective, I think the only change was the brighter screen with better viewing angles. The non-letter screen was hard to see off-angle.Depending on the price, it could be an excellent find!Joel Avrunin
OWON SDS7102V - basic image, but buttons not working and no signal visible - Page 1
Forum section: electronics / testgear

author: JoanTheSpark
author_rank: Contributor
timestamp: September 12, 2017, 04:35:23 am
content: As per title.Used the oscilloscope for a year now without problems, but all of a sudden it doesn't work anymore (essentially since yesterday).It boots, then there is the normal oscilloscope screen visible, but no signal and the buttons don't work.Anyone experienced this before?Tried the search for 5 minutes, but didn't see anything applicable.Thanks.PS: Purchased via Aliexpress, so can't just send it back.

author: JoanTheSpark
author_rank: Contributor
timestamp: September 12, 2017, 04:47:33 am
content: UpdateI removed the battery, switched it on and after having written the above post and some reading in the service manual to come back to it working again.With the buttons working I did a self calibration and autoset and it's behaving normally now *fingers crossed*.
CMU200 mirrored display - Page 1
Forum section: electronics / testgear

author: oh2ftu
author_rank: Regular Contributor
timestamp: September 09, 2017, 06:41:26 am
content: Hi,I booted up my CMU for the first time in months.The bios bootup seemed a bit off:It is mirrored?!The external display is normal, however. What could cause this? this continues all the way and can't be corrected?

author: oh2ftu
author_rank: Regular Contributor
timestamp: September 09, 2017, 07:40:45 am
content: The fix was a cheap one. I just had to dissemble and reassemble the FMR5-unit (especially cable between motherboard and display unit)

author: technogeeky
author_rank: Frequent Contributor
timestamp: September 09, 2017, 06:46:07 pm
content: melborp eht ees t'nod I

author: ps
author_rank: Regular Contributor
timestamp: September 10, 2017, 05:05:47 pm
content: For a LVTTL panel with 33 pin flat cable, pin 5 sets the horizontal scan direction, and pin 6 vertical. High (3.3 V) is one way, low (0 V) the other.Just in case you nead a head up display

author: usagi
author_rank: Frequent Contributor
timestamp: September 11, 2017, 04:27:47 pm
content: ¡?? o? ?u?? s?oo?
Programmable power supply suggestions - Page 1
Forum section: electronics / testgear

author: travLTTL
author_rank: Newbie
timestamp: September 11, 2017, 02:33:20 pm
content: Hey guys.Im looking for some ideas on a benchtop power supply that is capable of setting a specific ramp rate. I need something like 2.7V per sec. The unit also needs to be able to supply up to like 50V and up to say 5-10 amps. Also this needs to be able to be programmed without a PC interface (labView or any other software).Any help is greatly appreciated.
Iso-Tech IDM 203 meter - Page 1
Forum section: electronics / testgear

author: Specmaster
author_rank: Super Contributor
timestamp: September 18, 2017, 09:34:12 pm
content: Here is my latest Ebay test gear grab, as you will see from the attached before photo it was a bit of a state before I set about cleaning it up a little. The adhesive from the tape has left its toll on the plastic even after soaking it for 30 minutes with "Sticky Stuff Remover" and taking a souring sponge to the top to remove all the glue residue, it seems that there is some more to do yet, perhaps I'll have another go later.It is capable of running from the mains supply or batteries and has a bar graph, Min/Max, Rel, Hold and Delay functions plus the obligatory range, selector and light switches. Not a HFE tester socket in sight much to some peoples relief.There seems to be many variations of this meter wearing different badges with slight tweaks to the functions etc on the internet, has a handy lead stowage locker on the top with two removable plates to access both the fuses (600v HRC ones of course) and the 6 x AA cells. Strange thing here is that despite having a neat little power supply circuit they missed obvious, and that is to make the batteries recharge when on mains supply, instead opting for alkaline batteries? Maybe I'll address this in a later project if I ever want something to do.It seems to be essentially, a really good handheld meter back in the day, adapted to fit into a bench top case and a mains power unit added in to enable it to be used for extended periods without the need to be replacing batteries, something to be avoided if it is being used to capture power supply glitches etc on the Min/Max function.A couple of strange things I've noticed with is that where most meters will display O/L when an input is beyond the reach of the meter, it flashes the most significant digit on the display. The other is that on the diode test, instead of flashing the digit, it displays the maximum voltage available for diode testing of 3.1V, so on the forward bias it will display .5 or .7V whatever but reverse bias shows 3.1V or whatever the battery voltage is.

author: retiredcaps
author_rank: Super Contributor
timestamp: September 18, 2017, 10:05:19 pm
content: Your Iso-tech meter is a rebadged Appa Tech. Seehttp://www.appatech.com/appa_product_moa.php?pdid=20051220021218605830&&kindid=2005081003114075594http://www.appatech.com/upload/pdmodel/pdmodel_image113575443312378.jpgIso-tech handheld meters are also rebadged Appa Tech. Seehttps://www.eevblog.com/forum/testgear/iso-tech-(appa)-idm105-dmm/
Axiomet AX-380 / Victor 6052 Peak hold - Page 1
Forum section: electronics / testgear

author: keenox
author_rank: Contributor
timestamp: September 11, 2017, 10:02:55 pm
content: Hi!I have an Axiomet AX-380 (http://en.axiomet.eu/product/axiomet/ac-dc-digital-clamp-meter/ax-380) clampmeter and it's missing the peak hold functionality.I opened it to see what IC it has, but it seems to have an epoxy blob, so no luck there.On the PCB it's written Victor V0.9, so I googled it up and seems to be the same model as Victor 6052 (http://www.victor-multimeter.com/products/digital-clamp-meter/victor-6052-digital-multimeter-clamp-meter-694.html).Does anyone have any idea of the chip it uses and if it supports peak hold?If it doesn't, any hints on how I could piggyback it with a microcontroller and implement it myself?Thanks!
TDS7xx roll mode? - Page 1
Forum section: electronics / testgear

author: eevcandies
author_rank: Regular Contributor
timestamp: August 06, 2017, 05:21:47 pm
content: I recently obtained a good condition TDS744A, working fine (also the 1M option). Now I need to work with some very slow signals (like 0.1 Hz) & want to put the scope in a "roll" mode or "strip chart" mode...so the sensor waveform will just continuously pass along the screen like an old strip chart (perhaps showing 20 to 60 seconds on screen). I've done this with other Tek scopes, but can't figure out how to do it on the 744A..is this something buried in a menu, or a multi-step setup? I just want to be able to monitor the shape of what's going on (not trying to read out precise numerical values, with cursors or anything like that). There is nothing specific to trigger on in my case.

author: nctnico
author_rank: Super Contributor
timestamp: August 07, 2017, 03:18:42 pm
content: AFAIK the TDS744A doesn't have roll mode. What you could do is set the persistence to a few seconds in auto trigger mode.

author: eevcandies
author_rank: Regular Contributor
timestamp: August 09, 2017, 03:02:56 am
content: That's an "ok" tip, but how could such a high-end scope not have a roll mode (even bare-bones like monochrome TDS410 have it).....having it erase the screen, you loose the continuity...and can't really see the progress of the waveform (such as what happened just before the screen refresh). Do you know which Tek scopes lack a roll mode?

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: August 09, 2017, 10:25:03 am
content: Quote from: eevcandies on August 09, 2017, 03:02:56 amAny reason it has to be Tek?

author: eKretz
author_rank: Frequent Contributor
timestamp: August 09, 2017, 01:19:04 pm
content: AFAIK none of the Tek TDS scopes from the 5xx, 6xx or 7xx series have roll mode. As I recall, Tek made mention of this on answer to a question on their own site (FAQ), saying that since these scopes were mainly expected to be used for high speed work, they didn't see fit to include a roll mode.I have two TDS7xx scopes, and would have liked to have had a roll mode, even though it's not something I use super frequently - certainly it shouldn't have been very hard for them to implement.

author: eevcandies
author_rank: Regular Contributor
timestamp: September 11, 2017, 12:28:16 am
content: If true, that's quite ridiculous that none of the scopes have a roll mode, even when much lesser scope 10 years prior did! Is there a way to upgrade or add one (perhaps a patch). Is there a list showing which Tek scopes DO have a roll mode? I am now rather disappointed with the 744, since I often need to look at slowly varying signals, like drift, etc. I suppose I could use a $20 usb logger.
Rigol DP832 Firmware Update stuck? - Page 1
Forum section: electronics / testgear

author: Tim5000
author_rank: Contributor
timestamp: September 12, 2017, 08:46:43 pm
content: Hi, I've got a Rigol DP832 on V1.08 firmware (and 1.05 boot) that I decided to update to the latest firmware.I should first note that, although doing something stupidly wrong is entirely possible on my part, I'm usually updating something embedded in my own time every day - so it's not a new concept to me.Anyway my problem is that I've followed the DP800 firmware update PDF and, armed with the latest firmware from Rigol, created my USB stick to upgrade the PSU.I've also renamed the files as noted in the pdf as my starting firmware was < 1.0.9I tested the stick could be seen by the power supply.It's currently been running 20 mins stuck at 19.1/19.2 flickering....Any thoughts please before I dare power cycle it?EDIT: Not that it probably matters, but it has one official option fitted, and hasn't been unlocked etc.Thanks.EDIT2: Spotted this post so as it's now been ...a while...I power cycled without the USB stick in and the PSU has come back to life thankfully - phew!Quote from: thmjpr on August 28, 2014, 04:18:31 amEDIT3: Performing the update in the opposite order to Rigol's PDF (as per the post above) worked successfully. Hopefully it might be useful for someone else int the future.Thanks.
GW Instek PPH-1503 Reviews? - Page 1
Forum section: electronics / testgear

author: colorado.rob
author_rank: Frequent Contributor
timestamp: September 09, 2017, 09:29:02 pm
content: Has anyone done a review of the GW Instek PPH-1503 or PPH-1503D? I am not finding much online and the battery test/simulation feature seems like it could be useful to me.
Small impedance inductors mesurments with LCR400/Voltcraft  - Page 1
Forum section: electronics / testgear

author: Tommy1984
author_rank: Regular Contributor
timestamp: September 10, 2017, 09:04:20 am
content: Hello everyone,I have LCR400 Voltcrafthttp://www.conrad.com/ce/en/product/1301292/Component-tester-digital-VOLTCRAFT-LCR-400-Calibrated-to-Manufacturer-standards-CAT-I-Display-counts-20000?ref=searchDetailUser manual:http://www.produktinfo.conrad.com/datenblaetter/1300000-1399999/001301292-an-01-ml-VOLTCRAFT_LCR_400_KOMPONENTE_de_en_fr_nl.pdfAs it's mentioned in the user manual the LCR meter can measure impedance from 0.001uH to 20KH....I have tried to measure many different inductors with many different value (from 0.03uH to 0.440uH), but, it shows fail values!As the user manual says, the measuring frequency for the rang 20uH must be 100KHz (there's nothing about less than 20uH).Anyway, I have tried many frequencies, but, without any luck! Even in series or parallel, got nothing right or even a little close to the real values which should beAnyone has an idea what's going on or why I got that?Any help or tip is a very appropriated!Tommy

author: evava
author_rank: Regular Contributor
timestamp: September 11, 2017, 07:14:38 am
content: I am not sure how you know your meter measures wrong values.Maybe you could try this calculatorhttps://www.eeweb.com/toolbox/wire-inductance, calculate yourself 10cm 1mm wire (or whatever length and diameter wire) and measure it with your meter, if values are similar?Even DE-5000 struggles sometimes with very small inductanceshttps://www.eevblog.com/forum/testgear/strange-behaviour-with-my-de-5000/

author: Tommy1984
author_rank: Regular Contributor
timestamp: September 11, 2017, 09:14:30 am
content: Quote from: evava on September 11, 2017, 07:14:38 amThank you for your reply!I knew that were values because as I said, whatever the values were (0.03 - 0.440uH) the LCR-meter showed values between 0.07 and 0.085 uH.The inductors which I measured were labeled. So that's why!Tommy

author: Gyro
author_rank: Super Contributor
timestamp: September 11, 2017, 09:20:23 am
content: Why the double post?https://www.eevblog.com/forum/testgear/small-impedance-inductors-mesurments-with-lcr-meter-problem!/
Rigol Ultraspectrum (DSA815TG)  Labview Errors - Page 1
Forum section: electronics / testgear

author: K1JOS
author_rank: Regular Contributor
timestamp: September 09, 2017, 03:57:44 pm
content: Just bought the Ultraspectrum software license. Installed the latest Ultrasigma driver (1.06.01) and it seems to work fine getting screen picture capture. I then installed the latest version (1.00.21) Ultraspectrum and when I access it from Ultrasigma (right mouse click over USB DSA815TG) i get a series of missing Labview errors (see attached). During install of Ultraspectrum it created a National Instrument folder, but nothing that is called Labview. I cannot get to the Ultrapspectrum splash screen to activate my license, it fails with erros attached.Any advice?Jerry
DS1054Z vs 1074Z for +$100(70US) ? - Page 1
Forum section: electronics / testgear

author: lordvader88
author_rank: Frequent Contributor
timestamp: September 09, 2017, 06:26:56 am
content: So looking at ebay , 50Mhz vs 70Mhz for an extra 100CAD/ ~70USD. I'm headed towards high frequency stuff, so I'd regret later not having more bandwidth.WHat are the warrantities like on these these ? I bet they would be a nightmare to repair even for pro's and loaded with custom chips for all the processing and screen.Also does Rigol deal with RMA's based on the serial# on the back of it , or only if u buy it from an "approved" store with paper work?Does anyone make pure old fashioned analog scopes in this price range that could be repaired with crazy DSO digital stuff ? full of ICs ?

author: ebastler
author_rank: Super Contributor
timestamp: September 09, 2017, 06:31:00 am
content: You did find those 1000 posts which discuss how to increase the bandwidth for free, by applying an unlock code, did you?

author: Fungus
author_rank: Super Contributor
timestamp: September 09, 2017, 11:30:19 am
content: The 1054Z can be turned into a100MHz1105Z with all options enabled, for free.
Anritsu Site Master S113 - Page 1
Forum section: electronics / testgear

author: philpem
author_rank: Frequent Contributor
timestamp: September 08, 2017, 03:14:45 pm
content: Hi folks,I seem to have become the proud owner of a slightly used Anritsu Site Master S113. This is a 5MHz to 1.2GHz antenna analyser/distance-to-fault meter. I picked it up to complement my SARK-110 antenna analyser - which only covers up to 230MHz.I've been building UHF antennas and tuning them with an Advantest spectrum analyser and directional coupler, but it's hardly convenient. Hopefully this will be a step up!The unit is running V3.10 firmware and I have the V5.30 "Site Master Software" disks (which installs "Site Master Software Tools", a Windows 16-bit EXE which I'm having to run on a Win98SE laptop!).Does anyone know if there are any firmware updates available for this unit, or an updated version of the software?This must be a pretty old unit because Anritsu only list the S113A and later on their website...One gotcha I've found: if you use the Cable List Editor to add a description to a cable - CLE will crash the next time you load that cable list file.EDIT: I was going to upload the software disks, but disks 2 and 3 are over the 1000K (1 meg) attachment limitI'll see if KO4BB wants them for their archive.Cheers,Phil.
Siglent Serial Decode - Page 1
Forum section: electronics / testgear

author: fabltd
author_rank: Contributor
timestamp: September 07, 2017, 11:27:10 am
content: Hi AllSorry if this has been asked before but I cannot find an answer.I have just purchased a Siglent SDS 1202X-E and I am trying to get the Serial Decode to work.I have connected a FTDI cable to Channel 1 of the Scope ( Probe 1x)If I send ( 0xAA) the scope is decoding this as 0x55Sending 115200 8,N,1Decode set to:- UART - Threshold 1.5 V- BIT Order MSB- Idle Level High- Baud 115200 8,N,1Any ideas would be great.Thank you

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 07, 2017, 11:50:19 am
content: Quote from: fabltd on September 07, 2017, 11:27:10 amUART is LSB first

author: fabltd
author_rank: Contributor
timestamp: September 07, 2017, 11:52:57 am
content: ThanksThat fixed it :-)
DS2072 no display single shot hi-res mode until time/div moved - Page 1
Forum section: electronics / testgear

author: Circlotron
author_rank: Super Contributor
timestamp: September 06, 2017, 05:54:05 am
content: So I do a single shot capture at 500mS / div, auto mem depth, normal mode and the expected trace appears. No problem. However if I do the same in hi-res mode the screen remains blank *until* I rotate the time/div knob back and forth one or more positions. Then the trace appears, and less fuzzy than normal mode, as you would expect.Is there something wrong? Scope has latest firmware.

author: JDubU
author_rank: Frequent Contributor
timestamp: September 06, 2017, 05:17:24 pm
content: I just tried to reproduce on mine and I do get a trace in hi res mode (after expected memory fill delay) but it is fuzzy like in normal mode until I jog the time base knob. It then turns into a bright hi res mode trace.I have the latest firmware (3.05.03.03) also.
Running emulated Infiniium 8000, 80000 Series, 5485x oscilloscope software - Page 1
Forum section: electronics / testgear

author: scohenenator
author_rank: Newbie
timestamp: September 09, 2017, 04:52:21 pm
content: Trying to get a working emulated install of the Infiniium 8000 Series, 80000 Series, 5485x Series, and 5483x Series Oscilloscope Software. Agilent/Keysight has a nice link here to download the software (http://www.keysight.com/main/software.jspx?cc=US&lc=eng&nid=-32409.0.00&id=566904&pageMode=PV).Trouble is I'm having no luck getting either the 4.21 or 5.10 versions of the code to run against a clean Windows XP SP3 build in VirtualBox. Even after installing IO Libraries, Matlab drivers, etc, still getting stack dumps. Have tried nearly every install permutation, and VirtualBox hardware setting tweak combos. Has anyone had success getting any of these scope softwares running? If so, a list of the setup steps or any other hints would be much appreciated.Thanks, S.