hybridfree/eevblog-posts huggingface dataset:
Advanced continuity tester? - Page 1
Forum section: electronics / testgear

author: brainwash
author_rank: Frequent Contributor
timestamp: March 07, 2013, 12:00:35 am
content: I found out that the most used mode on my meters, after DC voltage, is the continuity one. I'm looking for a tool that is able to perform this stuff with these features:- latching (200-500ms) sound output with no input delay (<50ms)- a mode that injects less than 0.5V or a set voltage, so it does not trigger most semiconductors- is able to provide a pretty high current when asked to, to test intermittent connections- is able to survive accidental voltage (let's say 12 or 30V)- is able to measure either resistance and/or voltage drop between the test pointsI'll be happy with any three of the first four if such a product exists. A search for continuity meters just shows the stupid automotive ones with a bulb. I'll be happy to buy two or three products if combined they meet the above requirements since hunting down an intermittent connection in an automobile/motorcycle is a bit different than tracing a motherboard short in a phone.

author: PaulAm
author_rank: Frequent Contributor
timestamp: March 07, 2013, 01:28:39 am
content: If you're trying to track down motherboard shorts, get something like an HP 547a current probe. Connect the shorted traces to a pulse generator and then just follow the current path around the board until it hits the short. Trivial. Works on multilayer boards as well.Took me less than 5 minutes to track down a shorted tantalum cap on a 12x12 board the other week.
Helper Industries Manual - Page 1
Forum section: electronics / testgear

author: sherlock
author_rank: Contributor
timestamp: March 01, 2013, 04:05:25 pm
content: I just got a Helper Industries MM901 Modulation Meter. Unfortunately there is no manual of any kind with it. The company seems to be long out of business. I've looked at several of the boatanchor and free manual sites but nothing there. A basic internet search shows up nothing either. Has anyone here had any experience with this device or have any manuals they would like to share? A service manual would be great but an operating manual would be appreciated too. Thanks...sherlock

author: Adal
author_rank: Contributor
timestamp: March 05, 2013, 11:10:23 pm
content: Hi Sherlock.Maybe you find someting in this site:www.repeater-builder.comSaludos desde México!

author: sherlock
author_rank: Contributor
timestamp: March 06, 2013, 07:33:05 pm
content: Thanks, Adal... I already found that site and the MM901 isn't listed there. I'll keep looking.sherlock
Agilent E4432B Service Manual - Page 1
Forum section: electronics / testgear

author: bernroth
author_rank: Regular Contributor
timestamp: March 04, 2013, 06:19:25 am
content: Hello!I just bought an Agilent E4432B signal generator which works basically but has some issues according to the seller.I will check the basics (PSU, caps...) but I think I will require some service manual with block diagram and schematic (they deliver still their schematics?)Any chance to obtain it? Where to find the manual for this device?Thank you!Best regards,Bernhard

author: gearhead
author_rank: Contributor
timestamp: March 05, 2013, 01:04:42 am
content: You may find what you need here:http://www.home.agilent.com/agilent/techSupport.jspx?searchT=E4432B&id=1000002817:epsg:pro&pageMode=OV&pid=1000002817:epsg:pro&cc=US&lc=eng

author: bernroth
author_rank: Regular Contributor
timestamp: March 05, 2013, 06:29:25 am
content: Thank you, I have checked the site already previously as Agilents document library is the first source of informations.Unfortunately there is no service manual with all service instructions available.

author: nanofrog
author_rank: Super Contributor
timestamp: March 05, 2013, 06:47:39 am
content: Given it's an obsolete model, they may provide you with block diagrams and a schematic if you contact them. Worth a shot IMHO anyway...
has anyone used this AXIOMET AX-585B (brand/model) before? - Page 1
Forum section: electronics / testgear

author: 3roomlab
author_rank: Frequent Contributor
timestamp: March 05, 2013, 12:17:57 am
content: alo out there, just curious if anyone used this brand or specific model before.this is where i found it :http://www.tme.eu/en/details/ax-585b/portable-digital-multimeters/axiomet/#cheers

author: Bored@Work
author_rank: Super Contributor
timestamp: March 05, 2013, 05:34:14 am
content: Some rebadged stuff. I am to lazy to look up what OEM they rebadged. Not even autoranging. 45 Euro. I would pass.
Green to electronics OP wanted on forst scope purchase  /InstekGDS-806S - Page 1
Forum section: electronics / testgear

author: radiogeek97
author_rank: Regular Contributor
timestamp: March 05, 2013, 12:53:34 pm
content: Hi folksI have always been a handy guy and am into commercial 2-way and ham radios I found dave on youtoube and have gotten the electronics bugI have been slowly outfitting my "lab" and ran across a dso on my local craigslist here is a link to the unit:http://www.tequipment.net/InstekGDS-806S.htmlThe unit is Monocrome and is about 3 years old according to the owner, it comes with manual and one probe he bought it new $450ish and was asking 250$ i got him down to $175.00 usd he is about a 3 hour round trip for me but NOT knowing anything about this type of equipment i am not sure to buy or not.the only other problem is that I have no test equipment to speak of (function gen) to test this thing we will be meeting just off the highway for the purchase I have an inverter to power the unit up with but not much else.any info on the Brand Good or bad, the price, and if it is a good brand/price How to test it on the fly would be appreciated.thanks in advancejohn

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: March 05, 2013, 10:48:23 pm
content: Quote from: radiogeek97 on March 05, 2013, 12:53:34 pmWell, it's 60MHz 100MSa/s only, which isn't great by any standards. It's could be ok for a starter scope but you'll probably hit its limits very quickly, so I'd rather invest a bit more and get a more 'future proof' scope, i.e. a Tektronix TDS 500/600/700. It costs a bit more but in the long run you'll be glad that you didn't waste $175 on something which you very likely will replace soon after anyways.

author: Hydrawerk
author_rank: Super Contributor
timestamp: March 05, 2013, 11:46:02 pm
content: IMHO this scope Instek GDS-806S can be quite long lasting and durable. We have them at school... But i do not like this scope... Its performance is crap. It was introduced in 2004. It even has no USB port for flash disc. On the contrary, I like the old Agilent /HP scopes of the 54600 or 54620 series. They are even older, but they are pleasant to use.QuoteHaha, check this table from user manual below... The memory is not always 125kpoints.You can buy a GW Instek, but a newer one! This is 9 years old design... But it was obsolete even when it was new in 2004...
Dodgy Logic Probe (EISTA Branded) - Page 1
Forum section: electronics / testgear

author: David_AVD
author_rank: Super Contributor
timestamp: March 13, 2013, 02:35:30 am
content: I bought a couple of these logic probes off eBay recently and they arrived today. What total pieces of crap!They claim (in the eBay ad and on the packet) that it works on a supply of up to 18V, so I tried it with 17V to be safe. Result? Toasted! Opening it up reveals a crap design.So, I test the other one on 5V. It sort of works in TTL mode, but in CMOS mode the HI LED is on with a floating input. WTF???With a 12V supply the LEDs go so bright they look like they'll jump right out at me. Arghh....To be honest, I didn't expect these probes to be super duper, but thought they'd at least work correctly and survive the stated power voltage.

author: c4757p
author_rank: Super Contributor
timestamp: March 13, 2013, 02:48:13 am
content: Quote from: David_AVD on March 13, 2013, 02:35:30 amLet's see it!

author: TerminalJack505
author_rank: Super Contributor
timestamp: March 13, 2013, 03:37:23 am
content: Wow. How can you screw up the design of a logic probe? It's practically electronics 101. LOL
Cheap handheld serial analyzer? - Page 1
Forum section: electronics / testgear

author: rea5245
author_rank: Frequent Contributor
timestamp: March 02, 2013, 01:55:36 am
content: There are lots of times I'm working on a project and I need to watch UART, SPI, or I2C traffic (or maybe even generate it). Instead of plugging a USB device into my PC and running software, I'd love to have a handheld device with an LCD and test leads that can do the job. It seems that a cheap, hobby-grade device would be easy to make, and yet I can't find such a thing for sale.Is anyone aware of a device like this?Thanks,Bob

author: amyk
author_rank: Super Contributor
timestamp: March 02, 2013, 07:25:23 am
content: There's probably a way to use an Arduino to do this...

author: Bored@Work
author_rank: Super Contributor
timestamp: March 02, 2013, 08:33:23 am
content: Quote from: amyk on March 02, 2013, 07:25:23 am

author: kripton2035
author_rank: Super Contributor
timestamp: March 02, 2013, 09:19:08 am
content: yes a nice tactile user interface on top of a bus pirate would do it... who starts it ?

author: Marco
author_rank: Super Contributor
timestamp: March 02, 2013, 11:24:25 am
content: What's needed is a port of LogicSniffer to android.

author: mrflibble
author_rank: Super Contributor
timestamp: March 02, 2013, 12:59:27 pm
content: Quote from: Bored@Work on March 02, 2013, 08:33:23 amI could hear the *GROAN* from here. XDOther than that, usethisand then portthisto android.Quote from: kripton2035 on March 02, 2013, 09:19:08 amWellyouof course. Who else? I already have it working nicely on a laptop on the bench, so no real motivation to port ols to android. Opensauce tradition dictates that if you want something bad enough, you just implement it yourself.
Looking for a 5 GHz signal generator. - Page 1
Forum section: electronics / testgear

author: GK
author_rank: Super Contributor
timestamp: March 01, 2013, 01:01:13 pm
content: Hello all.I need a signal generator covering the range 1 - 5 GHz. Looking for possible suggestions; preferably something not of current manufacture that can be picked up secondhand for a reasonable price (say a couple of hundred bucks) and is not excessively fragile or jam packed with unobtanium.

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 01, 2013, 01:06:44 pm
content: Output level?Modulation?Sweep?GP-IB?

author: GK
author_rank: Super Contributor
timestamp: March 01, 2013, 01:13:13 pm
content: Sweep and Modulation would be nice, but not necessary. At least -20dBm. No GP-IB.
Buy 4in1 Test Workbench (metex ms-9160) - Page 1
Forum section: electronics / testgear

author: gman
author_rank: Newbie
timestamp: February 28, 2013, 05:52:03 pm
content: Hi all, I am a student currently studying computer system and electronics. I am looking to purchase a 4 in 1 test workbench ideally the metex ms-9160 or a very similar product, as this is the one I use in labs and therefore more familiar with. Anyways I was wondering if anyone who has one and doesn't use it would be willing to sell it? or point me in the correct direction where to get one (as cheap as possible) thanks for taking the time to read!

author: kripton2035
author_rank: Super Contributor
timestamp: February 28, 2013, 06:57:25 pm
content: if you're in europe, you can see this one that is very cheap (for now) but you will be able to see the market price of this item.http://www.ebay.fr/itm/MULTIMEs-SYSTEM-MS-9160-NETZTEIL-FREQUENZZAHLER-FUNKT-GENERATOR-MULTIMETER-ANLE-/130860086238?pt=Mess_Pr%C3%BCftechnik&hash=item1e77de73deI had one 10 years ago, it's an old stuff the power supply part and the multimeter were nice, but the frequency generator and counter really not precise at all. I switched to hameg 8000 serie after that . I'm sure you dont need all the instruments of the ms9160, so buy the hameg modules you need they are far better.

author: gman
author_rank: Newbie
timestamp: February 28, 2013, 07:13:44 pm
content: thank you for your reply. To be honest the main thing i need is a vriable dc volatage supply and a variable signal generator. Does the hameg 8000 series provide this for a low price? thanks again

author: kripton2035
author_rank: Super Contributor
timestamp: February 28, 2013, 07:49:41 pm
content: search for hameg 8040 and 8030 on ebay. you can get a good used one for 100-150 eurosnew they cost some 400 euros eachdont forget the 8001 bay that power 2 modules.sometimes you get some bargain with the 3 modules on one auction - you only have to be patient.
Agilent 2000 X-Series Signal Generator Issues - Page 1
Forum section: electronics / testgear

author: attie
author_rank: Contributor
timestamp: March 03, 2013, 07:24:17 pm
content: Hi All,I was using the siggen in my scope today, and found some issues.I've documented them in the videos below, and included a quick round-up too:When using the square wave modulation signal, it's frequency doesn't quite match the original signal's frequency.It's not possible to set the phase offset of the modulation signal... unless you count by pressing the button at the right time....The trigger output is rubbish... Ideally there would be a rising edge at 0°, and a falling edge at 180° of the original signal.Has anyone else found these issues? Has anyone found solutions?I wonder if Agilent will offer a solution to this... hopefully it's a firmware issue and that trigger output isn't genuinely put through a comparator...
Another continuity tester - Page 1
Forum section: electronics / testgear

author: mswhin63
author_rank: Frequent Contributor
timestamp: February 22, 2013, 05:40:38 am
content: Just thought I mention, I purchased a cable tester a few years ago and finally decided to open it up today -http://www.altronics.com.au/index.asp?area=item&id=Q2021As I was testing the continuity banana plug on the front the speed is astonishing. Total current draw is fairly high at 31mA but overall excellent speed unmeasurable by ear.I will probably set it up some where on my bench and use it extensively for continuity for circuit measurement. I may modify it slightly to reduce voltage and current output so that I cant damage any circuitry, but overall very happy. Nice loud buzzer too.

author: ttp
author_rank: Regular Contributor
timestamp: February 26, 2013, 09:05:53 am
content: Where are the photos? It doesn't count without at least one good photo

author: SLJ
author_rank: Frequent Contributor
timestamp: February 26, 2013, 11:58:33 pm
content: I have a Behringer that's similar to that one. I think yours tests a couple more connector types but I needed one that will send a test tone down a mic line.Just for fun, here's a unique continuity tester from the 1920s:It has a chrome case. It was designed to check continuity of fuses, lamps, motor windings, toasters, flat irons, vacuum machines, and anything else you can possibly get across the two contact bars on the face.When continuity is detected the red dot on the needle moves out of the window on the meter. If the dot does not move the item under test is open. It's powered by a standard 1.5 V C battery. It was sold by Testometer Laboratories, Chicago.

author: SeanB
author_rank: Super Contributor
timestamp: February 27, 2013, 05:55:47 pm
content: Steve's shop is not visible from ZA...........

author: SLJ
author_rank: Frequent Contributor
timestamp: February 27, 2013, 06:06:08 pm
content: Quote from: SeanB on February 27, 2013, 05:55:47 pmI wonder why.

author: SeanB
author_rank: Super Contributor
timestamp: February 27, 2013, 06:16:04 pm
content: Disappears upstream of me....Last good hop is:qux-jh-dca-2.za-b.za.mtnbusiness.net (41.181.165.115)Very odd that, only seems to be your site affected.

author: SLJ
author_rank: Frequent Contributor
timestamp: February 27, 2013, 09:19:57 pm
content: Maybe a router is down somewhere.
FLUKE 75 series ii multimeter - Page 1
Forum section: electronics / testgear

author: goesfast
author_rank: Newbie
timestamp: February 26, 2013, 03:51:13 am
content: I am new to this forum, and I thought I'd share with you my favorite piece of testing equipment! I have had it for twenty some odd years. I am staggered at the build quality and that even after this long, its accuracy is still spot on, and I've only ever had to replace the batteries! This meter is absolutely amazing.

author: SLJ
author_rank: Frequent Contributor
timestamp: February 26, 2013, 01:46:49 pm
content: Welcome!My Fluke 75 has served me well for years also. It's still accurate after many years of field service and being banged around in the bottom of my tool case. In fact, all the Flukes I have are accurate. Some much longer than twenty years. I finally broke down and bought a new 87V this year to keep tabs on the accuracy of the rest. I also have two Fluke 8000 series bench meters and two of Flukes early hand held DMMs, an 8020A and an 8020B. All of them work great.
Gould Service data  - Page 1
Forum section: electronics / testgear

author: Gonzini
author_rank: Contributor
timestamp: February 28, 2013, 11:28:41 pm
content: Hi guysFirst post around these parts, i've become a EEVblog convert having been watching the entertaining Youtube channel over the past few weeksSo anyone know of a resource online for Gould schematics, its near on impossible to find much out these days.I've got an old Datasys 750 which i would like to get going again as its just junk taking up space at the moment.Really could with some service data for it.I know its old, a dinosaur and probably not worth the effort but im going to have a goCheers!
data acqisition - Page 1
Forum section: electronics / testgear

author: vikasdhir
author_rank: Newbie
timestamp: February 23, 2013, 02:56:56 pm
content: I want to acquire data from digital ocillosope from both channels simultaniously for minimum period of 5 minitus to upto 10 minitus continiously and minimum frequency is 5hz. and upto 250hz. both input are Arbitrary type.Currently i'm having analog ocillosope and planing to buy DPO2002B.There shoud be no time lag bitween each wavwfrom and the data could be in internal format or it can be in EXCEL format also.

author: fcb
author_rank: Super Contributor
timestamp: February 23, 2013, 03:28:11 pm
content: You don't mention required resolution - but if your planning on a DPO2002 perhaps 8bits is fine?2 (channels) x 250Hz (max freq) x 2 (nyquist) x 600 (seconds) = 600,000 samples, this is close to the '1M' memory on the scope.And you will probably want sample fast than Nyquist. I would suggest buying a much cheaper USB scope or even a datalogger, more memory and higher resolution.

author: vikasdhir
author_rank: Newbie
timestamp: February 25, 2013, 10:29:59 am
content: Quote from: fcb on February 23, 2013, 03:28:11 pm8 bits is fine at 250 Hz what i want to measure delta of time bitween both channels Peak to Peak.What i realy want to know that while acquiring the data is there any dead time bitween each acquisition if there is any dead time then what will be the dead time?
tbs-7254b - Page 1
Forum section: electronics / testgear

author: diode702
author_rank: Newbie
timestamp: February 25, 2013, 12:45:30 am
content: Fellows i just picked up a tds-7254b digital scope at a estate sell for 500.00. I haven't had much time to play with it yet but it seems to be a good scope. Have not found a operation manual yet but still looking. What do you guy's think about this scope???All i kniow so far it works and says it has a 4 channel input up to 2.5 ghz. Am i reading this wrong 2.5 ghz or did i find the once in a lifetime find. It had four probes and a active probe with it.diode702

author: notsob
author_rank: Frequent Contributor
timestamp: February 25, 2013, 01:17:50 am
content: Have a look at this $23k refurbishedhttp://www.testequipmentconnection.com/36394/Tektronix_TDS7254B.php?gclid=CN3rmd-k0LUCFcJMpgod22MA7g

author: c4757p
author_rank: Super Contributor
timestamp: February 25, 2013, 01:34:12 am
content: Holy shit, dude. You got that for $500?? That is not a $500 scope.

author: BravoV
author_rank: Super Contributor
timestamp: February 25, 2013, 01:37:57 am
content: 4 ch 2.5 GHz scope for 500 bucks a piece ? Damn, I want two please.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: February 25, 2013, 06:26:16 am
content: Quote from: notsob on February 25, 2013, 01:17:50 amThat is more an example of what this seller would like to get for it than a reflection of the real market value of this scope. A TDS7254B probably goes for something in the region of $7k to $10k on the second hand market.$500 is still a very good price though

author: AndyC_772
author_rank: Super Contributor
timestamp: February 25, 2013, 07:45:35 am
content: I think I hate you... ! Provided it works, you've scored the bargain of the century there.I was very tempted by a TDS7404B (the 4 GHz version) that's been on Ebay for the last few weeks. It was up for sale at £4500 and didn't sell, though the seller did turn down an offer of £3750.What really made the decision for me was that the 7404 only has 50 Ohm inputs, so it doesn't work with passive probed, and that means it's not really useful as a general purpose bench scope. The same is true of the 7254, it's 50 Ohm only.
Rigol DG1022U Reviews - Page 1
Forum section: electronics / testgear

author: johnny diaz
author_rank: Contributor
timestamp: February 25, 2013, 12:56:19 am
content: Hi All,Long time lurker first time posting. First let me say that this is an awesome website and have learned alot. I'm just starting out in the world of electronics and am looking to purchase a new function generator and was thinking about getting the Rigol DG1022U. It will be used for home use. What are your thoughts of it? It is on ebay right now for $421. Also, what is the difference between arbitrary waveform function generator and just a function generator. The budget for now is $500 so if you think something else would be better for now and few years later lets hear it.http://www.ebay.com/itm/RIGOL-DG1022U-DG1022A-Arbitrary-Waveform-Function-Generator-25Mhz-Harmonic-sine-/221156854521?pt=LH_DefaultDomain_0&hash=item337df9caf9Thanks,Johnny

author: olsenn
author_rank: Frequent Contributor
timestamp: February 25, 2013, 01:31:45 am
content: Do not buy that unit. I own the DG2041A and I am very displeased with it. However, I'd recommend the DG4062. It costs more ($800), but you won't regret shelling out the extra bucks for it.

author: johnny diaz
author_rank: Contributor
timestamp: February 25, 2013, 02:23:56 am
content: What is it that you dislike? Also, how does the DG4062 differ from the DG1022U or DG2041A?

author: Wytnucls
author_rank: Super Contributor
timestamp: February 25, 2013, 02:55:34 am
content: I'd also like to hear what's wrong with the 20MHz 1022.I've had one for a few months now and the thing performs just like advertised. Of course, it is a basic function generator, but as a hobbyist, it will take a long time before you outgrow it.

author: andyturk
author_rank: Frequent Contributor
timestamp: February 25, 2013, 03:12:21 am
content: I've got the DG1022 which I got directly from Rigol NA for $379. I'm probably not a very demanding user, but I do like it. The user interface fairly simple to figure out without having to flip through the manual.My use of it thus far has been to generate low frequency (e.g., less than 10kHz) signals at a specified offset and amplitude. It works well for that, but seems to be fairly noisy at low levels. If you need to generate a 10mV signal without an attenuator, be prepared to live with about the same amount in noise.
Cheaper substitute for FLUKE 87 V - Page 1
Forum section: electronics / testgear

author: ticktock3t
author_rank: Contributor
timestamp: March 04, 2013, 02:40:13 am
content: I'm a student majoring in EE and I really want to replace my garbage DMM with a nice/accurate one. I would really like to own a FLUKE 87 V but it's way out of my budget. I'm trying to buy a meter for around $100 and was wondering if there are any older FLUKEs that are comparable to the FLUKE 87 V.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 04, 2013, 02:48:35 am
content: Quote from: ticktock3t on March 04, 2013, 02:40:13 amI and several others have already gave you options in the 3 or 4 threads you already started.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 04, 2013, 02:51:01 am
content: If you are not going to bother to read those replies or participate or give thanks, then I will reciprocate.

author: Lightages
author_rank: Unknown
timestamp: March 04, 2013, 05:32:39 am
content: I think we have a troll retiredcaps. I won't bother with this person anymore neither.

author: ticktock3t
author_rank: Contributor
timestamp: March 04, 2013, 08:02:59 am
content: I didn't get an answer I was looking for in the other posts which is why I posted again.

author: BravoV
author_rank: Super Contributor
timestamp: March 04, 2013, 08:24:59 am
content: Quote from: ticktock3t on March 04, 2013, 08:02:59 am

author: The_Penguin
author_rank: Regular Contributor
timestamp: March 06, 2013, 04:54:28 am
content: Quote from: ticktock3t on March 04, 2013, 08:02:59 amOK, I'll bite. What blanking answer are you looking for?I always set a budget then go way beyond it, so get a Fluke 87-V. There. Problem solved.
IFR/Aeroflex 2399A Spectrum Analyzer passwords? - Page 1
Forum section: electronics / testgear

author: videobruce
author_rank: Frequent Contributor
timestamp: December 15, 2012, 05:45:27 pm
content: I have Aeroflex (originally IFR), made by LG/Innotek (Goldstar) 2399A SA and need the password(s) for the "Factory Config" & the "System Option" entries in the "System" button.Anyone have such an animal?Thanks in advance.

author: videobruce
author_rank: Frequent Contributor
timestamp: February 18, 2013, 12:33:58 pm
content: Still looking. Anyone?

author: grumpydoc
author_rank: Super Contributor
timestamp: February 18, 2013, 01:56:00 pm
content: Dunno but I had a similar problem with the 2024 that I acquired, in the end I stuck a DSO with a long trace memory on the EEPROM and grabbed the data as it was read - not sure if this is possible on the 2399A but if the passwords are stored in an external EEPROM it might be the way to go.

author: videobruce
author_rank: Frequent Contributor
timestamp: February 18, 2013, 02:02:54 pm
content: Well above my pay grade.
Inside the Apply Iphone 5 - Page 1
Forum section: electronics / testgear

author: Mr Smiley
author_rank: Frequent Contributor
timestamp: February 12, 2013, 06:52:55 pm
content: Might be of interest to someonehttp://www.edn.com/design/consumer/4396870/1/Teardown--Inside-the-Apple-iPhone-5Mr Smiley
74/54 and 4000 series Logic IC testing capability of TL866 Univ. prog. - Page 1
Forum section: electronics / testgear

author: Nimesh Silva
author_rank: Newbie
timestamp: February 11, 2013, 05:31:34 am
content: Hi all,Having a thought of buying a TL866CS Universal programmer. Anybody having an idea of 74/54 and 4000 series Logic IC testing capability of it?coz, I currently have G540 programmer and its a crap. not sure about the IC testing capability of it. So thought of buying a reliable tester..Thanks in advance

author: SeanB
author_rank: Super Contributor
timestamp: February 11, 2013, 05:38:58 pm
content: Capacity is there and is working ( tested a few recently) but only covers the most common Cmos and TTL devices. I have a few 74170 register files that are not in the database. Did burn a pair of eproms to all 00 tday before tossing them in the bin ( OTP 2Mb devices) and read and wrote the eeprom associated with them on the laser printer interface they were on. Uses a 80186 processor to do Ethernet to some HP laserjet bus conversion, the cards are for old HP printers.

author: olsenn
author_rank: Frequent Contributor
timestamp: February 11, 2013, 05:47:24 pm
content: I have the TL866CS and I can confirm that it does work for testing logic IC's, but keep in mind that only the most common chips are supporting, and it doesn't autodetect the chip based on truth tables; you have to tell it which chip you are testing, and it will tell you if it passes or fails. The primary function of this device is programming memory chips and AVR micros (I love that it supports HV programming for resetting fuses).
Max 'useable' bandwidth on Agilent x2024a? - Page 1
Forum section: electronics / testgear

author: StubbornGreek
author_rank: Frequent Contributor
timestamp: February 08, 2013, 06:16:58 am
content: Can anyone who has a x2024a or x2022a comment on when the signal actually starts to become misrepresented by the scope? I know the rated b/w is 200MHz; just trying to get an idea how far you can actually push these.Also, if someone has the means and is willing to contribute a small bit of their time, I'm curious to know how bad a 370MHz signal looks on one of these. Thank you.

author: StubbornGreek
author_rank: Frequent Contributor
timestamp: February 09, 2013, 08:06:34 pm
content: Bumpers...

author: Unknown
author_rank: Unknown
timestamp: February 09, 2013, 08:28:56 pm
content: Bumping your topic because you didn't get an answer within a day is not going to make you very popular.I don't have access to one of those scopes. The bandwidth represents the -3 dB point, so a 1 Vpp 200 MHz sine will be displayed as a 0.7 Vpp 200 MHz sine. Rule of thumb for analog signals used to be that the scope should have a bandwidth about 5x higher than the frequency of the signal. This was for a qualitative assessment on a CRT only.For digital signals it's better to look at the rise times. For accurate rise times measurement, the system rise time of the scope and probe should be lower than the rise time of the signal. How much lower depends on the required accuracy. Here aresomeappnoteson this topic.A 370 MHz signal will most likely look like a severely attenuated sine wave, regardless of the original signal. How much attenuation depends on the frequency response of the front-end. Aliasing might also start to become a problem. Keep in mind that a square wave is composed of a large number of odd harmonics, these harmonics will be even more attenuated than the fundamental.

author: EEVblog
author_rank: Unknown
timestamp: February 09, 2013, 10:30:28 pm
content: IIRC my 500MHz 3000X series had a -3dB point of >600MHz, and I was able to display a 1GHz sine wave at very low amplitude of course.Dave.

author: Unknown
author_rank: Unknown
timestamp: February 09, 2013, 10:43:48 pm
content: Another issue might be trigger bandwidth. It will not necessarily trigger at signals far beyond the rated bandwidth. The trigger will be less sensitive at higher frequencies.

author: StubbornGreek
author_rank: Frequent Contributor
timestamp: February 10, 2013, 05:04:47 am
content: Thank you very much for your input. Sorry to bump so early but I was trying to take advantage of a time-sensitive buying opportunity (which didn't come to fruition).alm: Thank you for the links (good reading) and quick summation - your time is appreciated. Also, triggering is part of the reason I asked for a 370MHz example.Dave: I remember that episode, as a matter of fact, that episode is what made me wonder of the x2xxx series ability past its rated bandwidth.Regardless, I think missing the deal is almost a good thing. I really wanted more bandwidth and pushing a scope that far is just foolish.
Protek B8110 function generator - Page 1
Forum section: electronics / testgear

author: JoeyP
author_rank: Frequent Contributor
timestamp: February 04, 2013, 07:41:40 am
content: Anyone have experience with this generator? Besides overall quality, does it have a FAN?I'm tired of listening to the fan in my other function generator (DS345) all day when I just need a simple low freq signal.This one looks like it has quite a few features and decent performance for about $150 (new) on ebay. But, it is said to weigh 15 lbs, so I'm concerned that it might have a cooling fan. I couldn't find a picture of the rear, nor a power consumption spec.

author: mcclain1126
author_rank: Newbie
timestamp: February 06, 2013, 11:33:32 pm
content: I have 4 of these in a teaching lab that I run. There is no fan. The unit is a manageable size and easy to use. The only drawback for me is I have had two fail on me in the last few years. I think a couple transistors went bad and took a few resistors with it. Just a little smoke. I am not sure if the cause is poor design, or improper use. My lab is mainly used by beginners and I have seen some unusual hook-ups.
A uCurrent review... - Page 1
Forum section: electronics / testgear

author: JoeLaBidouille
author_rank: Newbie
timestamp: February 07, 2013, 07:42:50 pm
content: A very popular product review :http://www.embedded.com/electrical-engineer-community/industry-blog/4406380/1/The--Current

author: bingo600
author_rank: Super Contributor
timestamp: February 08, 2013, 09:04:59 pm
content: Thats nice words from Jack Ganssle.+1 to Dave/Bingo

author: smashedProton
author_rank: Frequent Contributor
timestamp: February 11, 2013, 12:31:43 am
content: Its also really easy to design a niche product, stolen from an app note, with no systems engineering. It's still better than what I can do at the moment. So i shouldnt judge
Hacking the OWON SDS7102 to SDS8102 or better - Page 1
Forum section: electronics / testgear

author: sbeukers
author_rank: Newbie
timestamp: January 22, 2013, 03:29:07 pm
content: Hi all,I was just poking around in the firmware of the owon SDS7102 and i found something interesting.First manualy unpack the file by opening it with 7-zip (winrar etc doesn't work)Then go to the following directory....\$_OUTDIR\SDS7102you will find 5 file in thereOS_H2OS_H4OS_H5OS_H6OS_H8Open those files with 7-zip and findhelpmeosreadme.txtIn readme.txt there is a line that says help=xxxx serial number i guess.The files in the folder \SDS8102 and others are just slightly different.Well I thought that maybe... just maybe we can take the firmware from the \SDS8102\OS_Hx and modify the readme.txt then put it in \SDS7102\ and pack it back to OS_HxIs there a chance that the number after OS_H? stands for a certain hardware revision.Anyone brave enough to try this?grt Sjoerd

author: rf-loop
author_rank: Super Contributor
timestamp: January 22, 2013, 07:06:00 pm
content: No way!HW is really different.SDS7102 use ADC08D500 cloneSDS8102 and 8202 use ADC08D1000 clonemade by RuiFeng. (propably same as Rigol DS2000 serie.)Also new SDS7102 versions have (typical) BW -3dB point between 170-220MHz depending of voltage range if you have seen tests. It is more than enough for realtime 1GSa/2x500MSa/s scope.Then also 7102 have full speed memory up to 2x10Mpoints. With one channel it can capture 1GSa/s to 10M sampling buffer. And with 2 channel in use it can 2 x 500MSa/s to both channels own 10Mpoints memory.If go to 8xxx models all memory over 10k is same speed as in 7102. 8xxx do not give anything more.

author: sbeukers
author_rank: Newbie
timestamp: January 22, 2013, 10:26:55 pm
content: How do you know that the hardware is really different?I really doubt that.The Rigols were the same, why not the Owons?*edit* I am really happy with the bandwidth of my scope but hacking stuff is always fun.

author: Matje
author_rank: Regular Contributor
timestamp: January 22, 2013, 11:03:59 pm
content: Quote from: sbeukers on January 22, 2013, 10:26:55 pmJudging from his signature I would guess he sells this stuff. ;-)
BK Precision 389A - Any good? - Page 1
Forum section: electronics / testgear

author: Aismass
author_rank: Newbie
timestamp: November 05, 2012, 03:26:59 am
content: Hey there everyone.Does anybody own or has anyone used the BK Precision 389A (or 390A even)? I'm in the market for a new meter around ~$150 CAD and would like some opinions on this thing. I can't seem to find any reviews of it. I know the 2709B is supposedly a pretty sweet deal, though I can't help but feel that the 389A would be more solid overall based on specs. Any other suggestions would be appreciated. Thanks!

author: retiredcaps
author_rank: Super Contributor
timestamp: November 05, 2012, 03:48:57 am
content: I can't comment on the BK multimeters since I have never used one, but if you are not opposed to buying an used multimeter, you may find a Fluke 87 III or 87V on your local kijiji for $150 CDN or less? Just make sure the fuses are not blown as they are expensive (between $6 and $9 each) and test all the functions before buying.$100 for an original Fluke 87 in good condition is "fair" market value in Canada.

author: Aismass
author_rank: Newbie
timestamp: November 05, 2012, 04:15:33 am
content: Thanks, I'll keep an eye out for those. Would not mind having a fluke

author: Lightages
author_rank: Unknown
timestamp: November 05, 2012, 05:09:06 pm
content: Dave had a BK 2709B in his $100 shootout. From this, it appears that the 389A might have the same 500V fuses, but I was impressed with the internal build quality and input protection otherwise.

author: Aismass
author_rank: Newbie
timestamp: November 05, 2012, 11:55:44 pm
content: It did look pretty good though I was hoping that maybe the 389A would be similar with better accuracy and fewer annoying issues.

author: (In)Sanity
author_rank: Regular Contributor
timestamp: January 13, 2013, 07:41:52 am
content: I've had a 390A for years and I have to say it's been a great meter. The 389A I suspect will be just as good quality wise. I also have a 2705B which works really good for the price.I have to say that B&K's customer support is top notch. I recently inquired to B&K about the price of a replacement tilt stand for my 390A because over the years it had just worn out at the hing and busted. No fault of the design really, just lots of use. Well B&K responded that they were sending me one, not that it would cost xx dollars but just that they were sending me one. A few days later I received a brand new replacement stand in the mail with no bill enclosed or need to pay. I've had my 390A for I would guess 7 years. To me that's just great customer service.Jeff

author: Aismass
author_rank: Newbie
timestamp: January 28, 2013, 02:28:47 am
content: Thanks for all the info. I ended up scoring a new Fluke 87v for 250 shipped from ebay so I guess my search is over

author: retiredcaps
author_rank: Super Contributor
timestamp: January 28, 2013, 02:53:56 am
content: Quote from: Aismass on January 28, 2013, 02:28:47 amLuckily you got your Fluke before thehugeUSPS international increase in price effective Jan 27, 2013. Buying from the USA for international customers has just become much harder and le$$ attractive now.
Rigol DS1052E RAM upgrade - Page 1
Forum section: electronics / testgear

author: Jok
author_rank: Newbie
timestamp: January 27, 2013, 01:14:20 am
content: I've been looking around to see if someone has actually done a RAM upgrade for the DS1052E as it seems like a straight forward thing to do. The current ISSI chip IS61LPS25636A (http://www.issi.com/pdf/61vps_lps25636a_51218a.pdf) could easily with some rework be replaced with a double capacity ISSI chip IS61LPS51236A (http://www.issi.com/pdf/61VPS_LPS-51236A_102418A.pdf) but would the software actually be able to use the extra RAM? As for upgrading it to 100MHz, I have actually ordered 3 AD9288BST-100 to replace the 40MSP ones originally in it and doing a software upgrade for it as well.Any good ideas for the ram upgrade? The ISSI ram chip is only about 18EUR on Mouser (http://dk.mouser.com/Search/ProductDetail.aspx?R=87061LPS51236A2TQLI) so it would be a rather cheap upgrade if it would result in double capacity for samplings.Regards,Jok

author: Unknown
author_rank: Unknown
timestamp: January 27, 2013, 01:24:28 am
content: Quote from: Jok on January 27, 2013, 01:14:20 amThere is no model in the DS1xxxE series with twice the memory, so it would be extremely unlikely that the extra memory could be used without major modifications to the firmware/bitstream. It would also require an extra address line that's most likely not wired.
Could Rigol DS1102E be hacked to be a "D"?? - Page 1
Forum section: electronics / testgear

author: Harrzack
author_rank: Newbie
timestamp: January 26, 2013, 12:28:15 am
content: Recently I came across Dave's video of the 1052E opening from 2009. In it he pointed to a good-sized header-strip but at that time had no idea what it was for.I'm wondering if this is the access for the logic analyzer function? Could it be that just adding a 40-pin (just a guess) ribbon cable and mating connector to the front - plus some SERIOUS hacking into the machine could enable the logic analyzer capabilities?? I've got a nice new 1102E setting here - it would be so cool if it could be (simply) turned into a "D"...I live in hope that many other of my wild fantasies may come true...=Alan R.

author: Unknown
author_rank: Unknown
timestamp: January 26, 2013, 12:50:16 am
content: No. This has been discussed before.This threadhas some pictures of the module you would have to clone. Add to this that you need pods, flying leads and clips, and you're better off buying a separate logic analyzer.

author: Harrzack
author_rank: Newbie
timestamp: January 26, 2013, 09:21:15 pm
content: Thanks for the links. Not surprised that this HAS been explored!=Alan R.

author: tinhead
author_rank: Super Contributor
timestamp: January 26, 2013, 10:27:28 pm
content: Quote from: alm on January 26, 2013, 12:50:16 amactually yes, from the price point of view it was never an issue, we talk about 100-150USD for all parts, pcb, test leads and clips (for single unit, volume - however not really possible here - would be much cheaper). Today (and 2010 it was even higher) the difference in price is about 300USD, so still lot of money to save.The only reason was lack of interesst (due poor performance of the Logic analyzer in compare to other you could get for 100USD).
BK Precision 1856B Price Question - Page 1
Forum section: electronics / testgear

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 23, 2013, 10:31:37 pm
content: I just won this BK 1856B 2.7GHZ frequency counter on Ebay for $122. I really did not think I would get it.http://www.ebay.com/itm/360566410374?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649This seller had another one listed for $250 OBO.http://www.ebay.com/itm/B-K-Precision-2-7-Ghz-Frequency-Counter-1856B-w-TXCO-Freq-Standard-NICE-/121056738187?pt=LH_DefaultDomain_0&hash=item1c2f8b3b8bThere is another one currently listed for $1250.http://www.ebay.com/itm/BK-Precision-1856B-/400379515817?pt=LH_DefaultDomain_0&hash=item5d387a93a9I found one currently being sold online for $1250.http://www.alltest.net/BK-Precision-1856BProvided it works do you think I got a good deal?Any experience with this model?Thanks

author: saturation
author_rank: Super Contributor
timestamp: January 24, 2013, 01:55:21 am
content: Its a very capable counter for what you paid for it, assuming it works. Counters can be very economical today, what makes a big difference is the overall accuracy and any added measuring features [ A/B comparisons, statistics etc.,]. Crystal oscillators can give variable accuracy even with the best options, but temperature compensation is better than none, and ovenized is better still, but a lot depends on how its done, thus some models excels over others.Counters are better if they allow options for external references that are stabler than its internal ones, and as the future makes available, an option this counter doesn't seem to have.The spec sheets say this BK does about 2ppm accuracy. Here the link is about the counter achieving 1-10 ppb with the counters native oven oscillator and later with a Rb oscillator taking it to 10-100 ppt. Although references could be superb, its also vital how the counter circuits use the oscillator. Also, specifying accuracy needs to specify the period, so for this quickie note, I can't tell if they are all the same, is that 2ppm per day? month? year? Also, the same holds for the discussion linked here; what is quoted is not for the same time period.https://www.eevblog.com/forum/reviews/racal-dana-1996-frequency-counter/msg183316/#msg183316The top option for users today is a GPS disciplined oscillator to bring it to 1 ppt or thereabouts. For reference, the current US standard is stability to 0.01 ppt in its atomic clock oscillator.http://en.wikipedia.org/wiki/Atomic_clockA guideline on increasing accuracy versus type of oscillator reference:And the range of drift over time of each standard:
Kikusui Model 1505 Digital Multimeter - Page 1
Forum section: electronics / testgear

author: martin
author_rank: Newbie
timestamp: January 16, 2013, 06:41:02 pm
content: This is the newest arrival to my collection of measurement equipment:The Kikusui Model 1505 Digital Multimeter.Very nice, that the company is still offering the manual as a pdf download:http://www.kikusui.co.jp/kiku_manuals/NUMERIC/1505_E.PDF

author: muvideo
author_rank: Frequent Contributor
timestamp: January 16, 2013, 06:47:42 pm
content: Nice, 8060a-esque

author: SeanB
author_rank: Super Contributor
timestamp: January 16, 2013, 07:34:33 pm
content: It could be a complete clone, nice old design there, very robust.

author: lowimpedance
author_rank: Super Contributor
timestamp: January 17, 2013, 12:05:38 am
content: Interesting specimen, actually closer to an 8020b.Got an old analogue Kikusui 100MHz CRO at work which I still gets regular use.
Missing IC in Advantest R3261A Spectrum Analyzer - Page 1
Forum section: electronics / testgear

author: sherlock
author_rank: Contributor
timestamp: February 11, 2013, 09:23:16 pm
content: I've been working on my R3261A spectrum analyzer and have run into a difference in the service manual and the actual equipment. On the IF portion of the motherboard there's a section that has an input jack J3 and an output jack J4. The schematic shows at the end of the amplifier chain U28 feeding U29, and U29 going to J4. Well there's no U29 that I can find anywhere! Tracing the connections shows J4 connecting to U28, which is clearly labeled on the PCB. There's a picture of the board in the manual but that section is covered by a shield box so you can't see anything inside where U28 (and 29?) are. I can see the Advantest numbers for the motherboard in the picture and they match exactly with the board that I have so the circuits should match. There's no "unused" parts on the board either. It appears that U29 may have been added at a later time but I'd guess that the PCB would have a different number on it. There's also no mention in the manual of this part being added. Has anyone that's familiar with this analyzer seen this or know where U29 might reside? Thanks in advance...sherlock
Rigol DS1102E - Page 1
Forum section: electronics / testgear

author: Cali-Sam
author_rank: Contributor
timestamp: January 14, 2013, 07:47:12 am
content: Can I get an opinion on the Rigol DS1102E. It is 399 USD. Is there a better scope with the same price tag?

author: Herman
author_rank: Contributor
timestamp: January 14, 2013, 09:04:06 am
content: maybe you can have a look of siglent's SDS1000CML, larger memory depth(2M),larger screen(7" 8*18div, I like the 18div display),cheaper price