hybridfree/eevblog-posts huggingface dataset:
HackRF vs. bladeRF vs. USRP: Comparison of Software Defined Radios - Page 1
Forum section: electronics / testgear

author: tckillian
author_rank: Newbie
timestamp: August 23, 2013, 02:27:40 am
content: I decided to write a review on the three new Software Defined Radios coming out this year, the HackRF, bladeRF and the USRP B210/B200. I'm an Electrical Engineering student without a lot of money to spend on toys, so I decided to write a comparison of the radios so that I could sort my thoughts.I don't know if many people have heard about the B210 because it was just released today (although it was at DefCon), but Ettus actually sent me one to review. I took some high def pictures and put them on the blog, so you can see all of the components on the B210 while we wait for Ettus to post schematics.http://www.taylorkillian.com/2013/08/sdr-showdown-hackrf-vs-bladerf-vs-usrp.htmlHope you guys find this useful, I put a ton of time into this. Let me know if you have any questions about the devices of if you have any tests you would like to see me run on the B210

author: Psi
author_rank: Super Contributor
timestamp: August 23, 2013, 02:44:33 am
content: Nice,I wonder what sort of output power the USRP can do at 6Ghz.The spec sheet just says >10dBm and doesn't go into frequencies.The hackRF drops to around -15 dBm at 6ghz

author: SDRGuy
author_rank: Newbie
timestamp: September 30, 2013, 09:58:00 pm
content: Hello All,I'm manufacturing this wideband MIMO software defined radio transceiver in the Chicagoland area:http://i41.tinypic.com/vyw8dj.jpghttp://i44.tinypic.com/29fy2jm.jpgwww.WindyCitySDR.comSincerely,Martin
Leader LCG-400 NTSC pattern generator--manuals online somewhere? - Page 1
Forum section: electronics / testgear

author: N2IXK
author_rank: Frequent Contributor
timestamp: September 27, 2013, 10:53:16 pm
content: Have a Leader LCG-400 test pattern generator here, and after replacing a whole lot of shorted tantalum caps, it appears to be working but it needs a minor touchup to the linearity on the bullseye/circle pattern. Whole bunch of pots on the board, mostly unlabeled.Anyone have a manual on this beast?
Grabbers / Hooks that can pierce insulation - Page 1
Forum section: electronics / testgear

author: Stonent
author_rank: Super Contributor
timestamp: September 27, 2013, 09:43:32 am
content: Is there anything like micro grabbers or oscilloscope hooks that can pierce wire?I know that telephone guys used to have the bed of nails clips but I guess I'm looking for either alligator clips or grabbers that can tap into 24AWG wiring with out too much disturbance of the pairs so it would have to be much smaller.It seems to me those would be handy in troubleshooting unshielded twisted pair cables.I was thinking along the lines of making an RJ45 end and the other end with 8 little clips.Since it seems we have a lot of dead copper at work if I could tap into it and trace it out without having to find the termination point, it could save me some time. We seem to have lots of coils of network wire coming down from ceilings. Normally to trace it, I'd have to put an end on it, but if I could just strip it back and tap into the pairs I could trace the cable somewhat and see if it was worth salvaging.

author: AndyC_772
author_rank: Super Contributor
timestamp: September 27, 2013, 12:39:27 pm
content: You could do a whole lot worse than to grip a pin with an alligator clip and use that. It's cheap, readily available, and easily replaced if the tip gets blunt or bent.

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 27, 2013, 06:09:54 pm
content: http://www.ebay.com.my/itm/Oscilloscope-Banana-clip-Test-Probe-Wire-Piercing-tip-reads-thru-insulation-/261279532491?pt=LH_DefaultDomain_0&hash=item3cd57945cbhttp://www.ebay.com.my/itm/Pair-of-Insulation-Piercing-HQ-Test-Probes-FANTASTIC-IP-Professional-Pro-Meter-/140904447169?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item20ce8f3cc1http://www.ebay.com.my/itm/POWER-PROBE-ELECTRIC-ELECTRICAL-EXTRA-PROBE-LEADS-CLIPS-TESTER-TEST-TOOL-KIT-SET-/281054459796?pt=US_Hand_Tools&hash=item417026b794http://www.ebay.com.my/itm/Expert-Multimeter-Test-Lead-Set-Prods-Back-Probes-Cable-Piercing-Croc-Clips-/151120321365?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item232f791b55
Oscilloscope Flat-Line - Page 1
Forum section: electronics / testgear

author: flylikechris
author_rank: Newbie
timestamp: September 27, 2013, 01:39:49 am
content: Hi guys, I just picked up an old analog dual channel 20MHz Hitachi V-212. It is only displaying a flat 0V line on both channels.Even when trying to connect and calibrate my probe, I don't see any waveforms, just a flat line. I hooked it up in several test points on my arduino to see if I could get anything, but nothing. Just a flat line.I have made sure that every setting is baseline as requested by the user manual.Does anybody have any ideas? Thanks!Service Manual:http://mpe.berklee.edu/documents/studio/manuals//testingmet/Hitachi%20V212/V-211%20V-212%20Operation%20Manual.pdf

author: kg4arn
author_rank: Unknown
timestamp: September 27, 2013, 01:49:11 am
content: Make sure the input coupling switch is set to AC or DC and not GND.And it would help if you posted a picture of your scope with all the control settings visible.

author: flylikechris
author_rank: Newbie
timestamp: September 27, 2013, 02:04:51 am
content: Wow, I feel like a fool. You've completely solved my problem. She runs prefectly!I will have to go do some research into what this switch does..Thank you so much!(Sorry about not uploading a picture to begin with).Here it is now.Regards-

author: c4757p
author_rank: Super Contributor
timestamp: September 27, 2013, 02:06:49 am
content: Quote from: flylikechris on September 27, 2013, 02:04:51 amSimple: in GND, the oscilloscope's internal "input" is grounded to give a flat trace. (Good for positioning the zero volt line on the grid.) In DC, the internal input is connected directly to the jack, and in AC, it's connected through a capacitor.

author: w2aew
author_rank: Super Contributor
timestamp: September 27, 2013, 03:33:51 am
content: Quote from: flylikechris on September 27, 2013, 02:04:51 amEverything you ever wanted to know about AC/DC coupling on a scope:

author: flylikechris
author_rank: Newbie
timestamp: September 27, 2013, 04:08:43 am
content: Thanks for the info guys. I am going to watch the video right now.

author: w2aew
author_rank: Super Contributor
timestamp: September 27, 2013, 04:26:23 am
content: Quote from: flylikechris on September 27, 2013, 04:08:43 amIf you like that one, I've got a lot more videos on scope topics.

author: madshaman
author_rank: Frequent Contributor
timestamp: September 27, 2013, 12:20:21 pm
content: I recommend watching *all* of w2aew's videos. Some of the highest information bandwidth videos I've ever watched.w2aew and others like him pretty much catapulted me from messing around with microcontrollers thinking I'm clever to retiring early from my job as a pathetic software engineer (one month left!) to do electronics full-time.No reason you can't do the same :-)
Logicstudio made in Afghanistan - Page 1
Forum section: electronics / testgear

author: eurofox
author_rank: Unknown
timestamp: September 23, 2013, 05:30:31 pm
content: I got something very interesting in my mailboxhttp://www.alibaba.com/product-gs/795668461/LOGIC_ANALYSER_16CH_USB_CONNECT_LOGICSTUDIO.html

author: free_electron
author_rank: Super Contributor
timestamp: September 23, 2013, 05:47:19 pm
content: an afgani logic analyser consists of 16 leds driven by a 330 ohm resistor.an afgani pattern generator consists of 16 toggle switches with an rc network to debounce.

author: echen1024
author_rank: Super Contributor
timestamp: September 24, 2013, 01:38:58 am
content: Teledyne LeCroy My Ass

author: ben_r_
author_rank: Frequent Contributor
timestamp: September 25, 2013, 04:01:41 pm
content: Weird.

author: Nermash
author_rank: Frequent Contributor
timestamp: September 25, 2013, 08:38:47 pm
content: First country to select from dropdown list && can't be bothered to fill in boring stuff like origin?

author: amyk
author_rank: Super Contributor
timestamp: September 25, 2013, 09:50:19 pm
content: Quote from: Nermash on September 25, 2013, 08:38:47 pmThat was my thought too. Are voltage regulators first in the list?Quote
Schematic for Fluke/Philips PM2811 - Page 1
Forum section: electronics / testgear

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: October 05, 2013, 06:28:32 pm
content: Hi,i need a schematic for Fluke/Philips powersuplay PM2811, only the Input Module , power innput 220V . I have found the rest of the schematuic online, but all misses the AC power input part..So if someone got it, i would be a happy and buissy engineer!! ;-)Erik
Play signals Rigol DG4062 - Page 1
Forum section: electronics / testgear

author: vincentdali
author_rank: Newbie
timestamp: September 22, 2013, 05:09:04 pm
content: HelloI own a Rigol DS2152E oscilloscope, which I am using to capture CKP and CMP signals of automobiles.These signals are synchronized and I'm keeping an external memory.Each signal occupies about 30k.I wonder if a random generator as the DG4062, I can play these signals to external memory preloaded.To purchase this generator or another.Thank you.

author: KedasProbe
author_rank: Frequent Contributor
timestamp: September 23, 2013, 05:34:52 pm
content: Your question isn't very clear.If you read the spec you should find what you need.You have 16k points per channel, you may need to do some work to get them in the right format to be able to load them in the DG4060, and you can adjust the phase between both channels.There are other generators with more memory.Also keep in mind this is a signal generator not a power source. (Internal resistance is 50 Ohm)
HP 53181A counter - deaf - Page 1
Forum section: electronics / testgear

author: Rory
author_rank: Frequent Contributor
timestamp: September 24, 2013, 01:40:38 pm
content: I recently acquired an HP 53181A frequency counter that someone had applied 100 watts of RF to its input. One obviously fried SMT resistor near the input BNC. Does anyone out there have a schematic portion that deals with the front end or have any experience repairing this nice piece of gear?

author: KJDS
author_rank: Super Contributor
timestamp: September 24, 2013, 02:07:25 pm
content: http://cp.literature.agilent.com/litweb/pdf/5989-6309EN.pdf

author: Rory
author_rank: Frequent Contributor
timestamp: September 24, 2013, 07:03:34 pm
content: Quote from: KJDS on September 24, 2013, 02:07:25 pmPerfect. The 53181A now counts what's hooked up to it.Thank you, KJDS. You got some brownie points today.
HP Agilent  55200A digitising scope - power input mistake. - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: September 20, 2013, 03:25:47 am
content: Hi all,have a question for someone who may know, as I cannot seem to find a service manual...Today, a friend and I were cleaning and testing various items. One being an HP / Agilent 55200A scope.Before plugging it in, a quick look was given to the input voltage rating. Clear as you like, was written 115-230Vac. So we plugged it into the 220v supply.This gave off a wheezing (if not hissing) sound, so we quickly switched it off and decided to plug it into the 120V supply - to be on the safe side.All that did, was blow the fuse and give off a small whiff of smoke out of the power input / high voltage covered section (we had already removed the cover) and being in a yard in the suburbs, a blown fuse meant 'rain stopped play!'Right about then, as I was having a closer look to see if anything looked crispy, I noticed a voltage selector, amongst the rear chassis vent fins, with its legs looking fairly scorched.Ahidden115 or 230Vac voltage selector... Bastards!! lol!So without a manual and before I go get it to open it up, would I be right to consider this as any other power input overload? Likely problem being the fuse, a cap' or two and possibly a diode or two, etc.Thanks

author: madsci
author_rank: Regular Contributor
timestamp: September 22, 2013, 05:37:40 am
content: The wheezing/hissing sound is likely the input filter capacitors venting. I think you're on the right path with your considerations.Test the following items to start:Mains fuseRectifierMain switching transistor(s)Filter capsAny MOVs in parallel with the mains.Any SCRs on the DC output, if present. If any are blown, check the secondary side rectifiers.

author: rf-loop
author_rank: Super Contributor
timestamp: September 22, 2013, 08:55:29 am
content: Here 54201 models power supply. (note: there may be small differencies between manufacture versions)Cut and merge images.It is 54201A/D but 54200A/D is just same family.

author: Unknown
author_rank: Unknown
timestamp: September 23, 2013, 04:52:51 am
content: This is why I like this site ......thanks for the input fella's.There hasn't been time to go back and get it but with a diagram, it all becomes that much clearer.I'll let you know how it goes...
Info on HP 54520C - Page 1
Forum section: electronics / testgear

author: vaualbus
author_rank: Frequent Contributor
timestamp: September 22, 2013, 04:26:21 pm
content: Hey, guys. Have you ever you the HP 54520C oscilloscope?Who is the maximum mprice you spend for the unit?IS a good instruments, for sepc it seems color display 2 gs/s, eccBest regards, Alberto Vaudagna
RTM & RTO R&S Digital Oscilloscopes - Page 1
Forum section: electronics / testgear

author: Carrington
author_rank: Super Contributor
timestamp: September 24, 2013, 02:16:12 pm
content: Anyone have one of these beasts?http://www.rohde-schwarz.com/en/product/rto-productstartpage_63493-10790.htmlhttp://www.rohde-schwarz.com/en/product/rtm-productstartpage_63493-11054.htmlhttp://www.rohde-schwarz.com/en/product/rtm2000-productstartpage_63493-38936.htmlRTM Series Prices:http://www.sjelectronics.co.uk/acatalog/RS__RTM_Digital_Oscilloscopes.htmlRTO Series Prices:http://www.sjelectronics.co.uk/acatalog/RS__RTO_Digital_Oscilloscopes.htmlTo which are more similar comparing them with all series of RIGOL? I think that we should start with the DS4000 series for RTM, and leaving aside the RTO Series.After a quick datasheet comparison, I think that comes out winning the DS4000 series.What do you think?

author: Bored@Work
author_rank: Super Contributor
timestamp: September 24, 2013, 03:09:15 pm
content: If you want to compare them, why don't you, yes, YOU, get the datasheets of the oscilloscopes that interest you and compare them?And what should be the point of comparing the antsy, touchy thoroughbreds (R&S) with farm horses (Rigol)?

author: Carrington
author_rank: Super Contributor
timestamp: September 24, 2013, 03:15:30 pm
content: Quote from: Bored@Work on September 24, 2013, 03:09:15 pmLOL...For this reason R&S RTM2054 cost ~9500€ and Rigol DS4054 ~4800€ (Excluding VAT).

author: c4757p
author_rank: Super Contributor
timestamp: September 24, 2013, 03:15:54 pm
content: Because he wants to know people's opinion on them, not just the quantitative performance specs...

author: Noize
author_rank: Regular Contributor
timestamp: September 24, 2013, 03:17:49 pm
content: Rohde and Schwarz is like Penthouse whilst rigol is like Readers wives or Razzle. Yeah, you are fourteen and you have only enough money to buy Escort magazine.

author: Carrington
author_rank: Super Contributor
timestamp: September 24, 2013, 03:19:54 pm
content: Quote from: c4757p on September 24, 2013, 03:15:54 pmRight

author: Carrington
author_rank: Super Contributor
timestamp: September 24, 2013, 03:21:23 pm
content: Quote from: Noize on September 24, 2013, 03:17:49 pmI like that comparison.

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 24, 2013, 05:30:05 pm
content: Rohde & Schwarz is not a hobbyist brand. I do not like their shared knobs.
Conductivity measuring cell - Page 1
Forum section: electronics / testgear

author: PA4TIM
author_rank: Super Contributor
timestamp: September 20, 2013, 07:08:51 pm
content: Does anyone have some info on the use of this Philips PW9517 conducivity measuring cell. It is a glass tube with two hose connections and meter connection.

author: Unknown
author_rank: Unknown
timestamp: September 20, 2013, 08:34:46 pm
content: Not sure about this particular instrument, but conductivity measurement is used to measure the concentrations of salts in a solution. For example drinking water might have a conductivity in the order of mS/m, while deionized water might be in the order of uS/m.

author: PA4TIM
author_rank: Super Contributor
timestamp: September 20, 2013, 08:53:03 pm
content: Thanks Alm, I think too it is something like that. I have several conductanse meters. One in (n)S, the others in (u)mho.I read somewhere it was also used in metalurgy, but not with a cell like this I presumeTwo things came to mind. It is used to measure contamination. pure water is suposted to be 1 Megohm (??) per cm. This they used as calibration. But the tube is closed, only those two hose connections. Contamination that is left in the tube will distorts future measurement. But how did they clean it ?The hose connections make me think it was used in a sort of permanent way to constant monitor some fluid.It is an intriging thing and beautifull build.

author: Unknown
author_rank: Unknown
timestamp: September 20, 2013, 09:21:06 pm
content: You'd clean it by rinsing with water or other solvents. Same way you would clean the tubing, valves or pumps that might be attached to it. It could for example sit at the output of a water purification system (like those sold by Millipore) to monitor water quaility. Contamination is not an issue then since water quality is expected to be fairly constant, and it's continuously being rinsed with water.

author: PedroDaGr8
author_rank: Super Contributor
timestamp: September 21, 2013, 02:48:22 am
content: This is a conductivity flow cell. It would be used to detect the conductivity of a steam of liquid flowing through it. It would not be used for stationary volumes. These are commonly found as one of several types of detectors in liquid chromatography devices. For example, at work all three of the FPLC instruments have conductivity, pH and multi-wavelength absorbance detectors. These are often used to detect and help identify what material is coming off the column at what point (thigh conductivity can be used to determine the buffer coming off as well).Sent from my EVO 4G LTE using Tapatalk 4
Splitting agian! - Page 1
Forum section: electronics / testgear

author: TRa757
author_rank: Contributor
timestamp: September 20, 2013, 10:58:13 pm
content: What is the deal with Agilent splitting again and again, the T&M gets a new name. WTF?http://www.eetimes.com/document.asp?doc_id=1319548

author: Bored@Work
author_rank: Super Contributor
timestamp: September 20, 2013, 11:00:15 pm
content: There are already two threads about it here. Why do you see the need to start a third?

author: free_electron
author_rank: Super Contributor
timestamp: September 20, 2013, 11:16:33 pm
content: he likes forking >must be a linux user
Buying Both Rigol DS1000Z AND DS2000 Scopes - Page 1
Forum section: electronics / testgear

author: Smokey
author_rank: Super Contributor
timestamp: September 27, 2013, 11:20:34 pm
content: Over on the other thread Soren pointed out that buying both a Rigol DS1000Z AND a DS2000 scope would be cheaper than a DS4000. That's 6 channels for less than the price of 4!*(with some compromise)This is a seriously interesting concept and I think it deserves it's own thread.Is it really the best of both worlds + more? Obviously assuming you don't need the full sample rate on all 4 channels of the DS1000Z, what are the fundamental drawbacks vs a single DS4000 (or Agilent equivalent)?Anyone have any experience with the Rigol PC software as far as syncing multiple pieces of test equipment?

author: egonotto
author_rank: Super Contributor
timestamp: September 28, 2013, 12:03:54 am
content: Hi,the trigger out from the DS2000-Serie has a large jitter. Is was some time ago a issue in the"REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol" thread.So it is problematic to interconnect with a other scope for more channels.Best Regardsegonotto

author: neggles
author_rank: Contributor
timestamp: September 28, 2013, 12:28:43 am
content: Quote from: egonotto on September 28, 2013, 12:03:54 amyou could use the DS1000's trigger out into the DS2000's trigger in, which would largely solve that problem unless you need to trigger on something only the 2000 can see

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2013, 01:38:04 am
content: I hadn't heard of this trigger jitter problem.But assuming you didn't have that (or connected them the other way around as suggested) then two scopes is indeed very interesting prospect.Sometimes two scopes can be handy for triggering on two independent conditions at different (or even similar) similar times when you wants different sample rates etc.You can also keep one hooked up and monitoring one project while you use the other on another project.One could be used as a portable scope you can easily take places, both around the lab and into the field. Sometimes it's really annoying to get your "main" scope down off the instrument shelf and move it to somewhere else you need it.

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: September 28, 2013, 07:32:30 am
content: what dave said! Many times "this".I have been contemplating a cheap 4 channel garage scope with full screen but with a DIY battery pack to work on various BLDC driven ebikes and CNC machines. One which wouldn't make me weep too hard if I blow out an input channel or drop it ect. Plus having a second scope lets you debug the other one if it develops off warranty problems.

author: JDubU
author_rank: Frequent Contributor
timestamp: September 28, 2013, 02:57:56 pm
content: Quote from: EEVblog on September 28, 2013, 01:38:04 amI have an old Fluke Scopemeter 97 for that purpose.It has the added advantage of being fully ground isolated (no connection to mains ground and no exposed metal parts at test circuit ground potential). This permits safe differential measurements with a single probe/channel.
Rigol 2000 series record function - Page 1
Forum section: electronics / testgear

author: npelov
author_rank: Frequent Contributor
timestamp: September 20, 2013, 10:24:49 am
content: Hi!I'm considering buying Rigol 2000 series scope. The record function seams quite nice, but I want to use it in a different way - start recording on first trigger, not by pressing record button. Is it possible? Or if there is no trigger it won't record anyway?

author: H.O
author_rank: Frequent Contributor
timestamp: September 20, 2013, 10:35:00 am
content: Depends on the trigger mode.If you set it to Normal you "arm" the recording mode when you press the Record button, then it will record each event which causes it trigg. If no such event occur nothing will be recorded.
New Fluke Calibrator with " Touch Screen" - Page 1
Forum section: electronics / testgear

author: casinada
author_rank: Frequent Contributor
timestamp: September 19, 2013, 07:38:20 pm
content: The best calibrator in the world now comes with touch screen(for all those ranting about Keithley having a sourcemeter with touch screen )http://us.flukecal.com/products/electrical-calibration/electrical-calibrators/5730a-high-performance-multifunction-calibr-0
DS1052E controls question - Page 1
Forum section: electronics / testgear

author: i_like_sparks
author_rank: Contributor
timestamp: September 19, 2013, 02:04:44 am
content: Hello,excuse a probably stupid question from a beginner.Let's say I'd like to use my new shiny DS1052E to measure the ripple/noise on a +12V signal. I know it's at 12V and want to zoom in to the 20mV level centered around +12V. If I first set the vertical scale to 20mV it takes ages spinning the vertical position knob to get up to 12V. Hmm... Ok, next time I set the vertical position to 12V first at the, say, 10V level, and THEN try to zoom in to 20mV. BUT this changes the vertical position as well, and it is now at 24mV, so I'm wheeling the vertical position knob again to get up to 12V...This is incredibly annoying. I must be missing something obvious. Can anyone enlighten me?

author: AG6QR
author_rank: Frequent Contributor
timestamp: September 19, 2013, 02:10:13 am
content: If you want to look at the ripple, switch to AC coupling. Now the signal is centered around the origin. This also improves the resolution of the samples.

author: Psi
author_rank: Super Contributor
timestamp: September 19, 2013, 02:11:29 am
content: Use AC coupling mode to measure noise.Since you're not concerned about the actual voltage, you just want to see how much its moving up and down by. Which is ACAC mode doesn't move when you adjust the vertical scale.

author: i_like_sparks
author_rank: Contributor
timestamp: September 19, 2013, 02:32:32 am
content: Ah, that's very useful.Still, I think this is not a good design. If the display is centered around 12V and I'm switching vertical scale it should be obvious that I'd still like to have it centered around 12V and not, say, 6 or 3 instead.

author: sync
author_rank: Frequent Contributor
timestamp: September 19, 2013, 02:38:05 am
content: This is how analog scopes works. But you can change it:Utility -> Preferences -> Expand Refer. -> Center

author: i_like_sparks
author_rank: Contributor
timestamp: September 19, 2013, 02:44:30 am
content: Thank you so much, that's exactly what I was looking for. Hadn't found that menu yet.

author: Psi
author_rank: Super Contributor
timestamp: September 19, 2013, 05:23:22 am
content: lol, i didnt know about that setting.Thanks

author: rdl
author_rank: Super Contributor
timestamp: September 19, 2013, 04:10:56 pm
content: omg! That has been bugging me ever since I got this scope. Thanks for the tip. Maybe I should read the manual some time.

author: Mechatrommer
author_rank: Super Contributor
timestamp: September 20, 2013, 04:22:44 am
content: yeah its usefull when the dc level is not changed.Quote from: i_like_sparks on September 19, 2013, 02:32:32 amwhat do you expect from a $300 scope?
Vintage TIME! Telequipment D31 Serviscope - Page 1
Forum section: electronics / testgear

author: wigman27
author_rank: Regular Contributor
timestamp: September 19, 2013, 10:01:57 am
content: Hey Guys and Girls!My Father in-law was sorting through some of his old stuff the other day and found a Telequipment D31 Serviscope! Which he has kindly donated to the causeI have no idea if it works or not, to be honest I was kinda hesitant about turning it on without checking if there are things I should look for or keep an eye out for before turning it on. I can't find an operating manual for it, I managed to find circuit diagrams but no manual.Also do you know if I can get probes to suit this machine anywhere?ThanksLee

author: ddrl46
author_rank: Regular Contributor
timestamp: September 19, 2013, 10:11:46 am
content: That looks like a PL259 connector, you should be able to get a bnc adapter on eBay, the input seems to be a standard 1M according to the manual so pretty much any probe will work (with that adapter).

author: rsjsouza
author_rank: Super Contributor
timestamp: September 19, 2013, 10:58:55 am
content: Quote from: wigman27 on September 19, 2013, 10:01:57 amI usually open the equipment up and visually inspect for massive dust gathering on top of the circuit - it may always carry metallic particles that can cause some sparks or an eventual explosion. Depending on the place it was stored, you may also find some bugs, but they will probably be dead.After clearing the dust, then I visually inspect for leaky / oily capacitors. Since it is a vaccuum tube oscilloscope, also check if the power supply filter capacitor (probably the largest aluminum can inside the oscilloscope) still has a small "pressure cap" on its top - if there is none, chances are the electrolyte is gone.Also, inspect the vacuum tubes to see if they are cracked or loose from their socket bases - don't forget to check if the tube of the horizontal amplifier (and maybe on the input rectifier) has a top cap and is secure in place.After turning it on, check if all tubes are glowing - they are a beauty to see in a dark room...Schematics are available from thetelequipment page.

author: M0BSW
author_rank: Frequent Contributor
timestamp: September 19, 2013, 04:15:22 pm
content: I hope it checks out and you get many years of pleasure from it, I personally like Telequipment and I have the D61A, which is used daily. Also I saw this on E-Bay maybe of interest to youhttp://www.ebay.co.uk/itm/Telequipment-D31R-Service-Manual-Schematics-on-CD-in-PDF-Mauritron-130-/151074141161?pt=UK_Sound_Vision_Vintage_Literature&hash=item232cb873e9
Keyboard problems Marconi 2024 Generator - Page 1
Forum section: electronics / testgear

author: pe1oxp
author_rank: Regular Contributor
timestamp: September 19, 2013, 05:53:11 am
content: Hello,I own a Marconi 2024 Generator for some years. Bought it allmost new and unused (ex-MOD). Less then 100 hours used.Now the keyboard is getting problems. When pushing most of the buttons nothing apears. Only after pushing several times the keys works again for a few days. Looks like it has to be cleaned.Before I dismantle the whole generator, has any some experience with repairing or cleaning these keyboard?Regards, Harry
Rigol DS2102 FW upgrade problems - Page 1
Forum section: electronics / testgear

author: hmlittle59
author_rank: Contributor
timestamp: September 16, 2013, 06:16:09 pm
content: Hello All,I sent a email to Rigol(a month ago) for the latest (FW) and they never responded.I have a 4G thumb drive that I reformatted like the book said and down loaded the latest (FW/software from here). The power on/help before the RIGOL log worked fine. I inserted my Thumb drive, it flashed a couple of times and then "ALL" the buttons lit up. I waited a while, turned it off and rechecked, but its, still the same number.The thumb drive was FORMATED wrong during my first attempt.ANY help pleaseSN:DS2a1521xxxxSW: 00.01.00.00.03HW: 1.0.1.0.0SPU: 03.01.05WPU: 00.06.05CCU: 12.29.00MCU: 00.05Thanks againHoward

author: Wim13
author_rank: Frequent Contributor
timestamp: September 16, 2013, 07:13:21 pm
content: here is the official upgrade doc from the Rigol website....

author: hmlittle59
author_rank: Contributor
timestamp: September 17, 2013, 10:02:27 pm
content: Hello All,Thanks Wim13 for the info. I did no know that it had to be a (.GEL) file.I down loaded the extraction file and it does not want to work with my system. Win. 7 64bit. All I see is a DOS screen pops up for one(1) second. I did not down load the correct (.GEL) file from before and I need to find out were I can get that. Like I said before.....RIGOL....has NOT answered my email about the latest file. Any way, if someone could point me to the right file for (.GEL) format of the latest DS2102 FW I would be so happy.Thanks againHoward

author: davidefa
author_rank: Contributor
timestamp: September 17, 2013, 10:55:10 pm
content: https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/

author: hmlittle59
author_rank: Contributor
timestamp: September 17, 2013, 11:30:06 pm
content: Hello All,Thanks davidefa, but, I can not un compress those files, I've tried a number of times, I would like to have the (.GEL) file format. I was once pointed to this type of file, but can not find it now.Thanks for any helpHoward

author: davidefa
author_rank: Contributor
timestamp: September 18, 2013, 06:17:52 am
content: These are the files uncompressed:http://www.davidefabbri.net/files/DS2000-01_01_00_02/DS2000Update.GELhttp://www.davidefabbri.net/files/DS2000-01_01_00_02/DS2000VersionNotes.doc

author: hmlittle59
author_rank: Contributor
timestamp: September 18, 2013, 12:20:10 pm
content: Hello davidefa,Thanks , on my way to the DAY job. Will do it when I get home.Thanks again.....This has been painful..... :Howard
Was the Rigol 1000D scope w/ logic analyzer a bad product? - Page 1
Forum section: electronics / testgear

author: iceisfun
author_rank: Regular Contributor
timestamp: September 15, 2013, 12:24:25 am
content: I've been holding off on logic analyzer stuff even though I do want to get one because I have not found the right one.Also after getting a DS2072 for my first scope it is quite awesome and I'm even considering getting a 4ch scope because I've had trouble watching some things that I need at least 3 channels for.My question is what happened to the logic analyzer option for the Rigol scopes, did it just turn out to be a bad product?

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 15, 2013, 12:45:31 am
content: Well, i do not like the multiplexed control knobs, but I don't think that DS1000D series is bad. It is just old. It was introduced probably in 2008, or so...http://www.rigolna.com/products/digital-oscilloscopes/ds1000d/ds1102d/It's probably the cheapest mixed signal oscilloscope that you can buy...

author: echen1024
author_rank: Super Contributor
timestamp: September 15, 2013, 01:29:12 am
content: Quote from: Hydrawerk on September 15, 2013, 12:45:31 amNope. There's a cheaper $400 hantek.

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 15, 2013, 01:57:42 pm
content: OK, sorry...

author: echen1024
author_rank: Super Contributor
timestamp: September 16, 2013, 01:15:05 am
content: Quote from: Hydrawerk on September 15, 2013, 01:57:42 pmHah. No problem. From what I hear though, the LA on that seems to be useless.

author: Unknown
author_rank: Unknown
timestamp: September 16, 2013, 02:25:38 am
content: I've never used it, but user reviews back then (mostly on rcgroups.com) were not very positive. Don't remember what the issues were, probably poor UI as usual.

author: c4757p
author_rank: Super Contributor
timestamp: September 16, 2013, 02:42:03 am
content: It wasn't bad, per se, it was justuseless. All it could do was display the logic levels and trigger on them. No decoding, no advanced triggers, nada. It basically gave you sixteen extra 1-bit analog channels.The little bit that it could do worked well.

author: nctnico
author_rank: Super Contributor
timestamp: September 16, 2013, 03:46:59 pm
content: Well, the old HP/Agilent mixed signal scopes where basically the same. Just 16 extra logic channels. Deep memory makes advanced trigger options unnecessary.

author: c4757p
author_rank: Super Contributor
timestamp: September 16, 2013, 04:28:37 pm
content: Yes and they had green phosphor CRTs.... There was a time when not all oscilloscopes had triggers! But one releasednowwithout one would be solidly within the realm of uselessness.
Hantek 5200 - Page 1
Forum section: electronics / testgear

author: diegosfb
author_rank: Contributor
timestamp: September 16, 2013, 03:19:41 am
content: Has anyone used the SDK of the hantek 5200I want to create a C++ App to create a DAQ sytem using the hantek scopeRegards.

author: frenky
author_rank: Unknown
timestamp: September 16, 2013, 05:04:35 am
content: Inside rar file that contains SDK you will also find samples for VB and VC++.
Rigol DG5000 and DG-POD-A option - Page 1
Forum section: electronics / testgear

author: Electro Fan
author_rank: Super Contributor
timestamp: September 15, 2013, 11:03:04 pm
content: Anyone have any experience with or opinions on the DG5000 and the DG-POD-A option they can share/comment on?http://www.tequipment.net/ProductImages/Rigol/DG5352/media/DG5352_doc_4.pdfThe 16+2 channels digital output module (optional) together with the analog channel can rebuild the more mixed signals in daily practice.- Page 176To Use the Digital Module (Option)DG5000 could be connected with the Digital Module (Option), which can generate arbitrary waveform based on general or user-defined protocol. To use digital output, please install the DG-POD-A option. DG-POD-A is a logical signal output module matching for RIGOL DG series Function/Arbitrary Waveform Generators, with external 16-channel data outputs and 2-channel clock outputs, making DG5000 series real Mixed Signal Generator (MSG). Main Features of DG-POD-A:? Provide two trigger modes: Auto, Burst;? Support output based on four protocols: RS232, SPI, IIC and PO;? Support user-defined protocol output based on PO;? Support a variety of code pattern outputs: All „0?, All „1?, „01? turn, IEEE standard pseudo-random sequence;? Support online data editing of protocols by users;? Support arbitrary output rate in the “Depend” work mode;? Support user-defined output channels, including data and clock lines (choose from 16+2);? Support digital channel and analog channel outputs and respective setting of output or not;? Provide TTL, LVTTL, CMOS, LVCMOS and user-defined voltage output;? Support remote configuration;? Provide user online help.
Purpose of test points on PCB from peakelec.co.uk Atlas LCR40 Meter? - Page 1
Forum section: electronics / testgear

author: dds
author_rank: Contributor
timestamp: September 15, 2013, 03:32:05 pm
content: You can see these on following picture:http://kousaku-yakata.ddo.jp:20000/img/kai/kai3036/009.JPG. Obviously this is for some factory pcb testing, but what kind?

author: marshallh
author_rank: Unknown
timestamp: September 15, 2013, 03:35:47 pm
content: In-circuit programming of MCU, or maybe for calibration/compensation curve EEPROM
Rigol DS2072 - RS232 decode problem - Page 1
Forum section: electronics / testgear

author: MaxMeise
author_rank: Newbie
timestamp: September 13, 2013, 04:13:31 pm
content: Hi all,I'm currently playing arround with my newly "upgraded" DS2072. Using the RS232 decode option i see some unexpected behavior.If sending only a couple of characters everything is fine, decoding as expected. But to test decoding a larger string I senta string of > 30 '0' ( 0x30) and used the recording function. Triggering was fine and all characters are captured, but decoding wasscrambled from the second record on. ( see attached screenshots ). Shouldn't the recording function allow me to see all data decoded ?best regards,Frank

author: Harvs
author_rank: Super Contributor
timestamp: September 14, 2013, 06:09:45 am
content: It looks like you haven't captured the start of the send sequence with the following records. So it's effectively just taken the first match it can as being the start bit. You need to be sure you capture some idle time at the start of each capture or the decoder won't know where to start. If you're stream is just continuous (i.e. not packets) then it's not going to be effective at just capturing random segments of it and trying to decode.

author: MaxMeise
author_rank: Newbie
timestamp: September 15, 2013, 07:52:16 am
content: Thanks Harvs,Yesterday I changed parameters back and forth but with no luck.I was hoping to be able to decode longer streams of data ( where my Logicport fails dueto his memory limitation of 2K ).Seems not to be that easy.best regareds,Frank

author: H.O
author_rank: Frequent Contributor
timestamp: September 15, 2013, 08:23:52 am
content: If you want to decode a single, long, stream then set the timebase of the scope so that you capture the whole stream. Then zoom in and to look at it.The recording funtion would be helpful if what you're grabbing is packets of data with large (relatively speaking) amount of "silence" in between. Capturing that in one sweep would waste a lot of memory capturing the "silence" in between packets.
Latest Rigol 1052E firmware ver. ?? - Page 1
Forum section: electronics / testgear

author: ocmaster85
author_rank: Newbie
timestamp: June 27, 2013, 03:04:21 pm
content: Hi all..!I just recived the 1052E together with their freq.gen 1022..What is the latest firmware for the 1052E scope.. ?? I haven't been able to find the answer on Rigol's webpage...Best regards from DenmarkOCMaster85

author: TerminalJack505
author_rank: Super Contributor
timestamp: June 27, 2013, 03:12:37 pm
content: According tothis threadthe latest version is at least 00.04.01.00.02.Yeah, good luck finding the latest firmware on Rigol's site. Sadly, it was easier for me to upgrade my firmware by just using the hacked upgrade from that thread than trying to get the latest version from Rigol.

author: ocmaster85
author_rank: Newbie
timestamp: June 27, 2013, 05:03:57 pm
content: Hehe yeah - not the easiest thing to find..!Mine is 04.01 at the moment... seems to work fine..!The frequencygen is also really nice.!! looking forward to use both in my small hobby projects

author: maomi84
author_rank: Contributor
timestamp: June 29, 2013, 02:38:44 pm
content: Quote from: TerminalJack505 on June 27, 2013, 03:12:37 pmCould you give the DS1052E latest firmware V4.1 to me ,I want to upgrade my scopebest regardsTHANKSMY EMAIL : tykisboy@163.com

author: TerminalJack505
author_rank: Super Contributor
timestamp: June 29, 2013, 03:53:29 pm
content: The firmware I used is linked to inthis post. As I understand it, this is version 00.04.00.01 with just a one byte change that enables the 100MHz bandwidth.Read the posts from that post forward so that you understand the implications of applying the hack.Edit: Whoops. I see that you have already posted in that thread and are using a newer version of firmware than the hacked version. I don't have a version of the latest firmware (hacked or not.)

author: LaurenceW
author_rank: Frequent Contributor
timestamp: June 29, 2013, 11:26:05 pm
content: If you wan the latest, legit firmware, simply email Rigol in china. They need your instrument part number and serial number, and will send you a .RAR file in a day or two. No dramas. The latest software for the DS1102E as supplied to me last week by Rigol is 4.01, not 4.10.

author: Sigmoid
author_rank: Frequent Contributor
timestamp: September 10, 2013, 07:24:30 pm
content: If you upgrade a 1052e hacked to 1102e on v2.x to v4, does it retain the hack? Also, is v4 worth it? I've heard that there were problems...

author: Sigmoid
author_rank: Frequent Contributor
timestamp: September 12, 2013, 01:36:10 pm
content: No really XD Anyone know what the differences are between 2.04 and 4.xx? Is 4.xx any better in terms of usability or bugs, or did they spend most of their effort in combating hacking?
Zeroplus conversion from 16032 to 162000 - Page 1
Forum section: electronics / testgear

author: DavidDLC
author_rank: Frequent Contributor
timestamp: September 11, 2013, 07:09:40 am
content: Long time ago I converted a ZeroPlus logic analyzer from 16032 to 162000.I have not fully tested the changes, I have succesfully tested a 5 MHz square signal ( which is the max frequency on my signal generator )The specs are:For the 16032:- Internal Clock (Timing Mode)?100Hz?100MHz- Memory?512Kbits- Memory Depth(Per Channel)?32KbitsFor the 16200:- Internal Sampling Frequency: 100Hz?200MHz- RAM Size: 64Mbits- Memory Depth per Channel: 2MbitsHow can I test all these parameters on the converted unit ?The software recognizes all of them.David.

author: eurofox
author_rank: Unknown
timestamp: September 11, 2013, 10:06:32 am
content: Quote from: DavidDLC on September 11, 2013, 07:09:40 amHi,Was the change only adding or changing memory?eurofox

author: DavidDLC
author_rank: Frequent Contributor
timestamp: September 11, 2013, 04:39:47 pm
content: I had to change the memory and the eeprom information.David.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: September 11, 2013, 06:22:47 pm
content: Should I try to read a 200 MHz clock signal ? I have access to high-end signal generators and more fancy equipment

author: eurofox
author_rank: Unknown
timestamp: September 11, 2013, 06:47:06 pm
content: Quote from: DavidDLC on September 11, 2013, 04:39:47 pmYou got the contents of the 200 Mhz eprom ?Lucky you

author: DavidDLC
author_rank: Frequent Contributor
timestamp: September 11, 2013, 08:12:34 pm
content: Reading at the manual, they recommend to measure a frequency 4 times lower than the internal sampling, so I assume testing a 50 MHz clock at 200 MHz sample rate can confirm the conversion.David.
Removing front panel buttons on a Keithley 192 - Page 1
Forum section: electronics / testgear

author: mcleod
author_rank: Contributor
timestamp: September 11, 2013, 06:33:53 am
content: Hi, has anyone removed the front panel display board on a Keithley 192?I have a switch that I suspect is bad, but I an not sure how the buttons come off so I can remove the board. I have tried just pulling them off and they don't seem to move, I am a little worried about breaking them, so I figured I would ask.Thanks!

author: free_electron
author_rank: Super Contributor
timestamp: September 11, 2013, 07:08:58 am
content: They pull off. The brown piece clips over the plunger. I believe there exists a little tool. Take a good look betwen the bronw piece and the fromtpanel. You should see the white opening. A small flat blade screwdriver i. The slit should do it.

author: mcleod
author_rank: Contributor
timestamp: September 11, 2013, 02:37:32 pm
content: Thanks for the tip! Turns out some clown glued a few of them on, but I was able to get it apart.
Fluke 87V vs 179 - Page 1
Forum section: electronics / testgear

author: echen1024
author_rank: Super Contributor
timestamp: September 11, 2013, 02:18:17 am
content: The specs sheet look the same, and the only notable difference is the lack of a uA range on the 179. Which one would be better for electronics work, especially as I can find a new 179 on ebay for $175.

author: rsjsouza
author_rank: Super Contributor
timestamp: September 11, 2013, 02:28:23 am
content: Although I have a 179 and it is a war tank, the 87V is your man for electronics... Not because of the µA range (Dave's µcurrent covers that area), but it has other features such as relative mode, filtering, duty cycle, etc...This is discussed somewhere around the internet... Places forelectronic aficionadosorelectricians.

author: kg4arn
author_rank: Unknown
timestamp: September 11, 2013, 02:44:29 am
content: I have them both. I agree with rsjsouza, 87V for electronics, if you can afford it.

author: retiredcaps
author_rank: Super Contributor
timestamp: September 11, 2013, 07:05:07 am
content: Quote from: echen1024 on September 11, 2013, 02:18:17 amBe aware that buying any new Fluke multimeter on ebay is likely NOT going to have the lifetime warranty honored by Fluke as most sellers on ebay are not authorized dealers.With this in mind, you can easily get an used 87V for $175 on ebay. With patience, you can get a 87V as low as $125. An used Fluke 179 goes around $100 to $125 on ebay.Regardless of which you choose, make sure to ask/get the temperature probe. Without it, you will have to spend $25 extra to get a Fluke branded one. As you saw in Dave's EEVblog #512 - Rigol DP832 Bad Design Investigation, it came in handy.

author: Fsck
author_rank: Super Contributor
timestamp: September 11, 2013, 07:43:10 am
content: For 175$ish budget, a used 87V is probably the best choice, as the rest said.you really need to make sure it's fully functional though. go local if you can, where you can handle the meter before agreeing to purchase.ebay can be a minefield
Agilent 33511B vs 33220A function generators - Page 1
Forum section: electronics / testgear

author: jpb
author_rank: Super Contributor
timestamp: September 10, 2013, 09:02:41 am
content: I only looked at this because Agilent are currently selling the 33220A on their e-bay store but it is also a current model.The 33220A with option 001 (to allow an external reference) is listed at US$2,700 in round numbers.http://www.home.agilent.com/en/pd-127539-pn-33220A/function-arbitrary-waveform-generator-20-mhz?nid=-536902257.536883183&cc=US&lc=engThe 33511B is much cheaper at US$1,954http://www.home.agilent.com/en/pd-2155031-pn-33511B/waveform-generator-20-mhz-1-channel-with-arb?nid=-33134.1026947&cc=US&lc=engComparing specs the 33511B wins on everything from rise time and jitter to memory size and by a long way. Is this just a case of Agilent squeezing money out of big companies that buy what they already have (as it has already been tried and tested and there is legacy software and so on) or am I missing some advantage that the 33220A has over the 33511B which is totally hidden in the data sheets?Since big companies probably don't bother with e-bay stores I can't see Agilent selling the e-bay 33220A at the price they are asking as it is still cheaper to buy a new 33511B complete with proper warranty.

author: echen1024
author_rank: Super Contributor
timestamp: September 11, 2013, 01:51:13 am
content: But if you think about it, you can get a better Rigol 4000 series for around $800, then hack it up to 200MHz. It also has more waveforms. Choices, choices, choices.