hybridfree/eevblog-posts huggingface dataset:
What to do? - Page 1
Forum section: electronics / testgear

author: Buzz239
author_rank: Contributor
timestamp: December 22, 2013, 08:52:19 pm
content: Well, the VSWR Software on my Rigol DSA815 TG Spectrum Analyzer was installed but it was only temporary. It ran out, now I have to make a decision.1. Buy the software $4592. Buy the package (software, VB 1020 VSWR BRIDGE) $599Is there any way to use a VSWR Bridge without the software?Tnx Gary

author: Rufus
author_rank: Super Contributor
timestamp: December 22, 2013, 09:05:02 pm
content: Quote from: Buzz239 on December 22, 2013, 08:52:19 pmYou might read some of the Rigol threads here for additional options.....

author: TomThomas
author_rank: Contributor
timestamp: December 22, 2013, 09:08:29 pm
content: Quote from: Buzz239 on December 22, 2013, 08:52:19 pmHi Gary,of course you can use a VSWR Bridge without the option and without doing a illegal hack.Use TG manually, do normalisation, and calculate the value manually. There is a app.note on Rigolna.com available, itrefers to DSA1000 but work also for DSA815.http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0092/0/-/-/-/-/file.pdfhelps?

author: Mr Simpleton
author_rank: Unknown
timestamp: December 22, 2013, 09:10:00 pm
content: Yes! If you do not mind to do some math yourself you can use your spectrum analyzer to measure the amplitude of the reflected power, and if you have the TG output power stored in a memory you can subtract this and show the amount of reflected power vs. output. No need to have special software.Still you may enable all features including the non official 10 Hz RBW... just read the mega-threadhttps://www.eevblog.com/forum/testgear/sniffing-the-rigol%27s-internal-i2c-bus/855/It's all up to you

author: Buzz239
author_rank: Contributor
timestamp: December 23, 2013, 04:39:03 pm
content: I watched a lot of James Eagleson's videos (thanks James) and it seems that the VSWR software eliminates the need for the Return Loss chart. So if this the case, why spend a lot of money on that software?Thanks for the comments.73 de Gary, KF9CM
Hameg Products - Page 1
Forum section: electronics / testgear

author: echen1024
author_rank: Super Contributor
timestamp: December 23, 2013, 03:44:14 pm
content: I have been browsing the Hameg pages, and I must say, the HMO compact and HMO 3000 series look pretty nice. Has anyone here used them and have any comments?

author: dr.diesel
author_rank: Super Contributor
timestamp: December 23, 2013, 03:55:47 pm
content: I have a HMC8012 and HM8118, love them both, Hameg is known for releasing a solid product from day one. This may sound stupid but the only thing that kept me from buying the HMO was the screen resolution, went with the MSO4024 instead.I am anxious to see what's to come of the HMC line, I will very likely buy more as they are released.

author: calexanian
author_rank: Super Contributor
timestamp: December 23, 2013, 03:58:52 pm
content: Looks great, but its a touch our of my price range!

author: dr.diesel
author_rank: Super Contributor
timestamp: December 23, 2013, 04:02:29 pm
content: Quote from: calexanian on December 23, 2013, 03:58:52 pmThat's the only complaint really, for the feature set they are slightly overpriced. My justification is that I know from day one I'm getting a quality instrument that I can count on.

author: echen1024
author_rank: Super Contributor
timestamp: December 23, 2013, 04:03:08 pm
content: Hameg products are quite expensive though. That is my only problem.
7 1/2 digit multimeter - Page 1
Forum section: electronics / testgear

author: eurofox
author_rank: Unknown
timestamp: December 23, 2013, 04:33:40 pm
content: Hi guy's,Chech here on our local second handhttp://www.2dehands.be/elektronische-apparatuur/overig-apparatuur/elektronica-meetapparatuur/multimeter-keithley-2010-174760599.htmleurofoxPS: I'm not involve in this
Powertech MP3086 30VDC 3 A PSU Teardown - Page 1
Forum section: electronics / testgear

author: hiddensoul
author_rank: Regular Contributor
timestamp: December 31, 2013, 07:01:02 am
content: Okay I spent the best part of the day playing around learning to use my new DSO(It is also my first) so thought I would also use it to do a review and tear down of my also new PSU from jaycar.I spent the late morning taking photos then did the testing of the PSU and finally typed it all up for my blog. I am not going to rewite it all here as there is heaps of photos and screen shots of stability, temp and noise levels so if you are intrested head over to my blog to check out the tear down.this is my first review and teardown so please be gentlehttp://twistedshack.blogspot.com.au/2013/12/jaycar-mp3086-30-volt-psu-teardown-and.html

author: KuchateK
author_rank: Regular Contributor
timestamp: December 31, 2013, 02:03:36 pm
content: Ian Scott Johnston has CSI unit that looks identical. He did a mod on it to show current during adjustment without any extra buttons.
Whats a good (reasonable) price for Agilent 53131A Counter? - Page 1
Forum section: electronics / testgear

author: junggwok
author_rank: Contributor
timestamp: December 22, 2013, 05:39:28 am
content: Hey folksI am just curious, what's fair or reasonable price for a fully functional Agilent 53131A universal counter. (no high stability time base or ghz input)?

author: VK5RC
author_rank: Unknown
timestamp: December 22, 2013, 07:48:39 am
content: A quick look on 'fleabay' looks like just over the AUD1000, I recall I got mine for 800-900 AUD a year or so ago, but then the Aussie dollar was worth a bit more then, I haven't had any problems with the bigger Chinese sellers and they see to sell cheaper than the US sources. If you can get under the AUD1000 you can often not get slugged with GST if you are importing into AUS.A good place to look ishttp://www.used-line.comfor an overall picture.I use an old HP GPSDO z3801 to get it up to accuracy.Otherwise a good bit of gear , some programmes available to run it via HPIB via prologix adapter , programme AThttp://www.ke5fx.com/regards Rob
Agilent 8590 E-series Calibration Guide - Page 1
Forum section: electronics / testgear

author: Cigarsnob
author_rank: Regular Contributor
timestamp: December 20, 2013, 11:58:00 pm
content: Howdy everyone,I am hoping someone here has a pdf version of the calibration guide for an Agilent 8590 E-series. I have an 8596E spectrum analyzer at work that may need to be dicked with and I can't seem to find this document online or on Agilent's website.Than you kindly

author: MarkL
author_rank: Unknown
timestamp: December 21, 2013, 12:39:29 am
content: http://cp.literature.agilent.com/litweb/pdf/08594-90106.pdf

author: Cigarsnob
author_rank: Regular Contributor
timestamp: December 21, 2013, 12:56:27 am
content: Thank you MarkL...That's what I get for believing a coworker when he says he checked Agilent's website. Should have known better
Rigol DSA-815-TG VSWR and UltaSpectum Missing?? - Page 1
Forum section: electronics / testgear

author: jstarr
author_rank: Regular Contributor
timestamp: December 20, 2013, 04:50:33 pm
content: I am using the trial version of Ultraspectrum advanced. Has anyone found a way to store the VSWR Marker table from the screen to a screen dump? I can save a spreadsheet for each trace with a corresponding frequency and dBm but this would then require a lot of manipulation in Excel spreadsheet. It seems odd they have all the other advanced features but not VSWR. Any advice appreciatedMerry Xmas to alljohn

author: Bored@Work
author_rank: Super Contributor
timestamp: December 20, 2013, 04:59:06 pm
content: You could try to get hold of the programming manual, a suitable driver and programming library, some programming language to access the library and then write your own code.

author: Rory
author_rank: Frequent Contributor
timestamp: December 20, 2013, 05:36:09 pm
content: Quote from: jstarr on December 20, 2013, 04:50:33 pmYou can do screen dumps with Ultra-Sigma once you're connected to the DSA815-TG.
Value of a Tek TDS2024B - Page 1
Forum section: electronics / testgear

author: philpem
author_rank: Frequent Contributor
timestamp: December 17, 2013, 12:58:38 pm
content: Hi there,Does anyone have any idea of the value of a Tektronix TDS2024B -- a 200MHz, 4-channel, 2GSps digital storage scope?It's been lightly used (only a hundred or so power cycles), passes all the diagnostics and includes a full set of probes, the soft carry case, and some spare parts (probe ground leads and the plastic flip-feet which fit on the front of the scope).Thanks,Phil.

author: nctnico
author_rank: Super Contributor
timestamp: December 17, 2013, 01:29:49 pm
content: Search on Ebay and tick 'sold listings'.

author: grumpydoc
author_rank: Super Contributor
timestamp: December 17, 2013, 01:43:12 pm
content: As nctnico says search ebay for this (or similar spec) models and look at what they actually sold for (rather than what people ask which can be very different).Of course what it's worth is what someone is prepared to pay and that will depend a lot on whoever's doing the paying - a hobyist will not be prepared to pay the typical prices that the large used test equipment vendors try to charge.The Siglent SDS1204CFL is a broadly similar spec and I found that on sale new at £874 (inclusive of VAT) in the UK - that probably places the upper limit around £800 for a 2nd hand 'scope (even if the Tek might be better specified in some areas).So,.... £400-800 is probably the sort of ballpark that you're looking at.

author: philpem
author_rank: Frequent Contributor
timestamp: December 17, 2013, 02:22:28 pm
content: I did check eBay, but all the units I saw listed were either damaged, broken or missing parts. Nice to know what the ballpark value is though.Thanks.

author: Retep
author_rank: Regular Contributor
timestamp: December 17, 2013, 02:38:58 pm
content: The TDS2024B scopes listed as sold on eBay seem to be in pretty good condition:http://www.ebay.com/sch/i.html?_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=200&_fpos=&_fsct=&LH_SALE_CURRENCY=0&_dmd=1&_ipg=50&LH_Complete=1&_nkw=TDS2024B&_sop=15

author: philpem
author_rank: Frequent Contributor
timestamp: December 19, 2013, 09:12:05 pm
content: Quote from: Retep on December 17, 2013, 02:38:58 pmAh -- I was looking at Ebay UK, which hides a lot of these results. Looks like one just sold for about £800 in Germany, which isn't too bad. Maybe there's hope for my "buy a DSO-X3034A" plans yet...
Multimeter comparison, within spec? - Page 1
Forum section: electronics / testgear

author: MagooT
author_rank: Newbie
timestamp: December 18, 2013, 11:04:36 pm
content: Hi!I was measuring some voltages with two meters and thought the readings looked a bit off, so i did some more measurements. I have these three meters:Extech 430 (+-0.5% +2 digits)Fluke 87V (+- 0.05% +1 digit)Gossen Metrawatt Metrahit X-tra (+-0.05 +3 digits)I did some measurements, hooked all up to the same power supply.Measurement 1:Extech 0.996VFluke 1.0005VMetrahit 1.0014VMeasurement 2:Extech 2.989VFluke 3.001VMetrahit 3.010VI was mainly thinking about the difference between the Fluke and Gossen meters,is it possible from this information to calculate if one of them is out of spec?Thank you for any help.

author: retiredcaps
author_rank: Super Contributor
timestamp: December 19, 2013, 12:14:11 am
content: In high resolution mode, the Fluke 87V accuracy specifications for DCV is +/-0.05% + 10 digits.

author: Lightages
author_rank: Unknown
timestamp: December 19, 2013, 01:18:10 am
content: Well you gave some measurements but what was the actual voltage being fed to the meters? If you don't know the voltage to an accuracy better than the best accuracy of the meters then you have no way of knowing which is in spec or out.

author: MagooT
author_rank: Newbie
timestamp: December 19, 2013, 08:09:08 am
content: Thanks for your replies.Unfortunately i don't know the actual voltage, i don't have an accurate voltage source.I just thought for example the 9mV difference between the gossen and the fluke on the second measurement looked like a lot.Is there any affordable voltage standard that could be used to check this?

author: Wytnucls
author_rank: Super Contributor
timestamp: December 19, 2013, 08:50:58 am
content: As retirecaps pointed out, the Fluke 87's accuracy is not that great at 0.05%+10, so it is still within specs, assuming the Gossen is closest to true voltage, like it should be.

author: Neilm
author_rank: Super Contributor
timestamp: December 19, 2013, 11:16:24 am
content: Were all the meters connected at the same time? If they were not then any difference in input impedance could change the actual voltage on the terminals hence the different readings.

author: MagooT
author_rank: Newbie
timestamp: December 19, 2013, 11:35:36 am
content: Wytnucls> Is the +10 digits also for the 6V range, without high res mode? From the datasheet i understood it should be +1 digit, but i could be missing somethingNeilm> Yes, all meters were connected simultaneously and i left them on for about 5-10 minutes to make sure the readings were stable, which they were.

author: Wytnucls
author_rank: Super Contributor
timestamp: December 19, 2013, 11:53:45 am
content: +10 for the 20,000 count high res mode, +1 for the normal 6,000 count, regardless of voltage range.(except for mV range where accuracy is worse at 0.1%+1)
Rigol Group Buy - Page 1
Forum section: electronics / testgear

author: echen1024
author_rank: Super Contributor
timestamp: November 05, 2013, 03:36:06 pm
content: Anyone interested in using the Rigol 5 for 5 deal at Tequipment? Any Rigol product is eleigible as far as I am concerned.

author: tequipment
author_rank: Regular Contributor
timestamp: December 18, 2013, 04:38:12 am
content: Email me for a EEvblog codeevan@tequipment.net

author: tlu
author_rank: Regular Contributor
timestamp: December 18, 2013, 05:03:42 am
content: I could go for a DP832 and a DSA 815-TG. How will the group buy work with Tequipment?

author: Marc M.
author_rank: Regular Contributor
timestamp: December 18, 2013, 05:25:33 am
content: There is no need for a group buy. The good folks at TEquipment offer EEVBlog members a slightly better discount even on individual pieces. I've had the fastest response by submitting an RFQ (request for quote) and asking for the EEVBlog discount within the RFQ. They also happily applied the discount retroactively on 2 purchases I had made prior to discovering their generous offer to EEVBlog members.

author: echen1024
author_rank: Super Contributor
timestamp: December 18, 2013, 04:32:45 pm
content: Well, I purchased my DS1074Z with a 6% off last month... so no need now.
MICE-8 Z80 Emulator - Page 1
Forum section: electronics / testgear

author: ludzinc
author_rank: Unknown
timestamp: December 09, 2013, 06:04:45 am
content: Hi AllAt work we support some *really old* gear, and one of the test jigs uses a MICE-8 Z80 (also known as an ICE-8) in Circuit Emulator.We need a replacement - our working unit died, and we are running on the spare, so it's not urgent. Yes we are developing a replacement rig, but that will be months away. Big company intertia.If you have one gathering dust somewhere, whack it up on eBay and I'll see if work will purchase it or not.ThanksSimon

author: Bill158
author_rank: Regular Contributor
timestamp: December 10, 2013, 04:33:07 pm
content: Are you referring to the NICE Z80 emulator made by NICOLET?Bill

author: ludzinc
author_rank: Unknown
timestamp: December 18, 2013, 04:34:44 am
content: No, sorry it's much bigger and more complicated than that!Some pics of the sick unit attached.ThanksSimon

author: eurofox
author_rank: Unknown
timestamp: December 18, 2013, 05:57:06 am
content: This one ....http://www.ebay.com/itm/Vintage-Mice-Micro-In-Circuit-Emulator-Model-No-Mice-8-Z80-/111013816933?ViewItem=&item=111013816933&nma=true&si=w15bd1v%252BsK6PfQVYs5KvKYNniww%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

author: amyk
author_rank: Super Contributor
timestamp: December 18, 2013, 06:05:21 am
content: Any idea what's wrong with it? Could be something trivial like a cracked solder joint.Anyway, please post pictures of the inside!

author: ludzinc
author_rank: Unknown
timestamp: December 18, 2013, 12:19:10 pm
content: Quote from: eurofox on December 18, 2013, 05:57:06 amDammit - I was all excited until I saw that the auction had finished. But yes, that's what I'm after!

author: ludzinc
author_rank: Unknown
timestamp: December 18, 2013, 12:22:58 pm
content: Quote from: amyk on December 18, 2013, 06:05:21 amI'll see what I can do - camera's and work don't play nice (defence related).Not a cracked solder joint - had the techs check that. I was inintially thinking that becuase if you leave it powered up for (many) hours it some times comes good! It loses the external clock input, and I've not been able to spare the resources to try to track it down. Might be a new year activity for a graduateHeck, I'd pay good money for a broken one at this stage. A second set of boards to swap in / out could help!

author: eurofox
author_rank: Unknown
timestamp: December 18, 2013, 12:50:02 pm
content: Quote from: ludzinc on December 18, 2013, 12:19:10 pmContact the person/company who sold it and ask to put you in contact with the person who bought it, is probably someone for hobby use to play for 50$ and offer him a "good" price.eurofox

author: nctnico
author_rank: Super Contributor
timestamp: December 18, 2013, 01:30:54 pm
content: Another option is to wait until the buyer gives the seller feedback (or vice versa) so you can contact the Ebay user who bought it.About the bad unit: With this old gear you can have numerous problems including logic chips which went bad. It usually takes some time to figure out where the problem is.
digital mega ohm meter designing - Page 1
Forum section: electronics / testgear

author: yogece
author_rank: Contributor
timestamp: December 17, 2013, 06:20:13 am
content: hi,can anyone help me with the schematics of mega ohm meters or some suggestions

author: Rerouter
author_rank: Super Contributor
timestamp: December 17, 2013, 10:30:28 am
content: create an accurate current source probably ~10-100nA sourcing from your supply rail to 1 terminal, and the other terminal tied to a signal ground (not just the miserable ground plane)measure the voltage on your sinking terminal with an ADC if you really want digital,probably including an op amp that lights up if its close to the supply rail as its then considered open circuit when your source cannot accurately produce it.or if you just want a digital display, buy a cheap lcd / 7 segment display voltmeter module, and adjust your dot point as necessary, remembering to tweak the offset before you use it,edit: in both cases the sinking terminals voltage should be buffered by an op amp with a very high input impedance and low current draw on the inputs.

author: kripton2035
author_rank: Super Contributor
timestamp: December 17, 2013, 11:41:32 am
content: here is one open source :http://www.edaboard.com/thread287707.html#post1230438

author: kripton2035
author_rank: Super Contributor
timestamp: December 17, 2013, 11:44:23 am
content: silicon chip did some too : article 103504 and article 112015

author: TiN
author_rank: Super Contributor
timestamp: December 17, 2013, 12:37:07 pm
content: First step indesigningshould be define required specification. Is it only megaohm meter? For resistor measurement or in-curcuit probing capable device? Or maybe insulation meter? Does it need any controls, if yes - then which ones? Display or remote readout? If remote - which interfaces? Then power supplyAnswering this questions will bring idea of what needed to be done, as resulting design approach will change a lot for every different case. If it's material/insulation meter may be enough to generate higher voltage and get away with uA/mA range measurements. If in-curcuit/low voltage - entering nV/uV ranges for signals will bring lots of headaches.Also if need just working reliable tool , then often it's more cheaper to buy existing meter. But if design purpose is education or some special requirement meter - that's another story.

author: brian_stine
author_rank: Newbie
timestamp: December 18, 2013, 12:11:20 pm
content: Do you just care about resistance or resistance at 1000V? Most mega-ohmmeters are insulation testers that test the current at 1000V. Such meters are not useful if you just want to measure the resistance of high impedance DUTs. I once tried to test the resistance of a 1GOhm resistor with an insulation resistance tester and blew it to bits because 1000V was too high for it.
Ultra-Sigma screen print experiment - Page 1
Forum section: electronics / testgear

author: Rory
author_rank: Frequent Contributor
timestamp: December 20, 2013, 07:16:15 pm
content: Please try print screen of your Rigol device on Ultra-Sigma - First use 'P' keyboard shortcut. Then try the menu item. What appears in the target directory in each case? For me, with the kbd shortcut, only the .bmp file shows up. With the menu option, 3 files appear - .jpg, .bmp and .png. Is this a feature or a bug?
MSO5202D desn't work after firmware upgrade - Page 1
Forum section: electronics / testgear

author: tayfun
author_rank: Newbie
timestamp: December 14, 2013, 04:51:35 pm
content: Hi;I recently got my brand new MSO5202D. I download latest firmware fromwww.hantek.comwebsite and put in to usb stick. Then I upgrade the scope. Menu appears please restart the scope. When I restart the oscilloscope Hantek logo comes then blue screen comes and restarts.I have dst1kb_3.2.35_15202d_fact130826.0.up file. Please help me.....

author: Tasman
author_rank: Contributor
timestamp: December 16, 2013, 09:38:39 am
content: I remember there was a firmware problem with the MSO but cannot recall the details. Post your query on this forumhttps://www.eevblog.com/forum/testgear/hantek-tekway-dso-hack-get-200mhz-bw-for-free. Tinhead will probably be able to help.
Want a Rigol DS1102E for $329.00 Shipped? - Page 1
Forum section: electronics / testgear

author: 300EVIL
author_rank: Contributor
timestamp: December 12, 2013, 11:23:48 pm
content: NOT SPAM.... I PROMISE.Anyway, I just purchased a Rigol DS1052E on sale and free shipping from a company in the US (rymes with) "Tefitment.net" for $329.00 shipped. Anyway, received an email an hour later saying they were out of the 1052 and would just upgrade me to the 1102 for no extra charge!Cool!Now I don't have to worry about hacking it. (Even though I was kinda looking forward to it.) I was on the forum reading about the firmware hack when I got the email so I figured I'd try to contribute something possibly useful.Just thought I'd share this if anyone is looking for one and doesn't want to hack it. No guarantees you'll get the upgrade I did but $330 shipped is a good deal for the 1052 alone.Thanks!AdamP.S. Love your videos Dave!

author: creyc
author_rank: Regular Contributor
timestamp: December 12, 2013, 11:27:34 pm
content: Just so no one gets their hopes up, they may have given you a discount but that doesn't mean they will necessarily honor that price for others.That is a good deal though, thanks for mentioning it

author: BeerCannon
author_rank: Contributor
timestamp: December 12, 2013, 11:35:07 pm
content: I tried to get them to sell me a DS1104Z for the price of a DS1074Z (because I have a 1074Z on order and they were out of stock). They didn't bite..

author: sorin
author_rank: Frequent Contributor
timestamp: December 13, 2013, 11:08:57 am
content: tefitment.net

author: electronics man
author_rank: Frequent Contributor
timestamp: December 13, 2013, 03:48:59 pm
content: By the way do you like the ds1102E its just I am looking for scopes and I have limited funds is it worth it.

author: ivan747
author_rank: Super Contributor
timestamp: December 13, 2013, 04:37:38 pm
content: Quote from: sorin on December 13, 2013, 11:08:57 amReplace the "f" for "qu" and "t" for "p".

author: reagle
author_rank: Unknown
timestamp: December 15, 2013, 11:35:34 pm
content: I've been in a "waiting for stock" position with them many times, and when asked for substitutes they'll just try to sell you whatever expensive POS the sales person feels like pushing. Lately I just started ordering direct from Rigol

author: iceisfun
author_rank: Regular Contributor
timestamp: December 15, 2013, 11:50:54 pm
content: Quote from: reagle on December 15, 2013, 11:35:34 pmRigol direct has been good for me too

author: echen1024
author_rank: Super Contributor
timestamp: December 16, 2013, 12:08:22 am
content: Quote from: reagle on December 15, 2013, 11:35:34 pmNo, I have purchased from Tequipment, and their service is actually quite good.

author: ivan747
author_rank: Super Contributor
timestamp: December 16, 2013, 03:06:21 am
content: Quote from: echen1024 on December 16, 2013, 12:08:22 amIt is a typical small to medium American business support: excellent and fast.

author: creyc
author_rank: Regular Contributor
timestamp: December 16, 2013, 03:58:17 am
content: Agreed, that's where I bought my Rigol and they were great to work with.
Function generator with high frequency triangle - Page 1
Forum section: electronics / testgear

author: nickm
author_rank: Regular Contributor
timestamp: December 15, 2013, 07:20:24 pm
content: I'm looking for a function generator that would mainly be used for generating PWM. I've noticed that a lot of the generators can get Sine/Square at 20MHz but the triangle is only 100kHz or lower. I would also use it occasionally for pulse trains and more general stuff, but I think if it can do the triangle I can do the basic stuff too. The one that I have been looking for is the HP 8116A but I would like to open up to any other viable options. I would like to avoid kits and DIY type stuff because this is something that I don't want to have to suspect when I'm getting funny problems.The things I like about the 8116A that I would like to have but isn't necessary:PWMDigital control. (I've had problems with analog type drifting around even after everything has been set.)The only real requirement is:Triangle up to 500kHz (1MHz better).Thanks in advance for any input.

author: Terabyte2007
author_rank: Frequent Contributor
timestamp: December 15, 2013, 07:46:48 pm
content: I have a Rigol DG4062, and it will do this and more. You may want to look at this one.

author: RacerX
author_rank: Contributor
timestamp: December 15, 2013, 09:17:45 pm
content: I have a HP 3314A and it does all three functions (square, sine and triangle) all the wayup to the max of 20Mhz
Rigol DP832 Brick? - Page 1
Forum section: electronics / testgear

author: jkw13
author_rank: Contributor
timestamp: December 14, 2013, 12:01:47 am
content: I think I've "bricked" my new DP832 by downgrading it to v1.06 and back to v1.08.ADC cal doesn't work anymore, and the display meters are wrong.Is there any way to recover from this do you think? Perhaps I did something wrong?Does anyone know the ManualCal procedure?Thanks!

author: iceisfun
author_rank: Regular Contributor
timestamp: December 14, 2013, 02:27:15 pm
content: By chance is your 832 a model with the heat sink problem?Maybe you can send it in for the board maintenance and they will fix that too.

author: jkw13
author_rank: Contributor
timestamp: December 14, 2013, 09:25:08 pm
content: Thanks for that, mine has the modified heatsink.Have just heard it is a firmware bug, so going to speak to Rigol
Agilent 33120 Function Generator problem....any suggestions would be great.... - Page 1
Forum section: electronics / testgear

author: gotwood
author_rank: Contributor
timestamp: December 13, 2013, 10:28:48 pm
content: The generator was working fine....now there seems to be no output of any kind.I ran the unit through it's self test and it comes up PASSED.Ive called about a dozen electronic repair stores in the area but none work on equipment like this.I'm from the chicagoland area....anyone know of repair shop or a good reasonable shop where it can be sent in??Thanks

author: c4757p
author_rank: Super Contributor
timestamp: December 13, 2013, 10:42:00 pm
content: Got a scope and soldering iron?

author: free_electron
author_rank: Super Contributor
timestamp: December 13, 2013, 10:55:22 pm
content: open the top . locate the black coax cable coming from the BNC connector going to the motherboard. There is a fuse in that cable.If the fuse is not there : see where the cable connects to the motherboard. in that area there will be a 250mA Littlefuse resistor fuse . it looks like a brown Thru-hole resistor. it has no color bands. it is uniform brown in color and my have a little 'Li' or UL logo on it and the numbers 025That is most likely the one that went bye-bye.The machines internal self test can test to the point where the signal leaves the main board. that is before the fuse. the fact that it passes selftest means the board is good , but the fuse popped

author: gotwood
author_rank: Contributor
timestamp: December 13, 2013, 11:04:12 pm
content: thank you will give that a try.......as to other suggestion....im not that advanced to know what id be looking for....

author: c4757p
author_rank: Super Contributor
timestamp: December 13, 2013, 11:17:09 pm
content: Well, if f_e didn't already know what was wrong, I was going to try to walk you through what to check. They're pretty simple machines, especially if it's just the output that's failed. I just didn't have time to type out more than that right away.(But my experience is that if there's something wrong with a piece of HP/Agilent gear, he'll always know what to check for)

author: free_electron
author_rank: Super Contributor
timestamp: December 14, 2013, 02:03:07 am
content: Here ya goON a normal machine that is where the fuse is located.If this a machine that came from an educational institute the fuse is in the cable. These machines have a factory option to have it installed there so it can be swapped without soldering. Makes it easier to fix them when subject to student error.
vb1020 vswr bridge tear down or full scale dump - Page 1
Forum section: electronics / testgear

author: Buzz239
author_rank: Contributor
timestamp: December 13, 2013, 03:48:50 pm
content: Hi everyone,Does anyone have a tear down or full scale screen dump (with a 50 ohm terminator) for the Rigol vb1020 vswr bridge? I have searched with Google and Bing to no avail.TNX de Gary, KF9CM

author: Rory
author_rank: Frequent Contributor
timestamp: December 13, 2013, 06:09:59 pm
content: Full span VSWR from 2 stacked Tektronix 20db attenuators terminated with an Ampenol RFx 50R. VB1020.

author: Buzz239
author_rank: Contributor
timestamp: December 13, 2013, 06:51:31 pm
content: Thanks Rory,That pattern looks great no wonder it cost $600.Gary
Xytronic LF-389D soldering station temperature controll - Page 1
Forum section: electronics / testgear

author: electronics man
author_rank: Frequent Contributor
timestamp: December 11, 2013, 08:20:54 pm
content: i got this new soldering station for about £67 i am very pleased whith it, it is very good quality. i am no expert but it is very good (I have only ever had a cheepv no name brand £10 iron from maplin so dont hold me to this). it has many replacable parts and does a very good job. it has a temp range of 150c to 450c so perfectly adequat however it has these problems:1. you have to open the unit to replace the iron2. there are no spade shaped tips for iti wanted to open it up to see the quality inside and it did impres however i notoced there was no wire comming from the iron to the unit for a thermo couple or thermistor so i dont understand how the temparature is controlled and it apears thet the iron is 240V mains powerd ( it has the blue and brown wires going to it) does any one know how this iron works. i was wondering if it used some sort of triac pre calebrated PWM controll.i will do a full review and i will post some photos of the unit later

author: poorchava
author_rank: Super Contributor
timestamp: December 12, 2013, 09:18:57 am
content: Being a Xytronic user myself, I suggest that you open it up again and replace the caps. I have an LF1600 station and the hardware inside is assembled well and all components are brand name, but the capacitors are CapXon which is bad.You don't have to use rubycon or chemicon for replacement. Ordinary Panasonic, Samwha, Daewoo, Samxon, Sanyo or something like that.

author: electronics man
author_rank: Frequent Contributor
timestamp: December 12, 2013, 03:26:18 pm
content: Problem the xytronic is my only soldering iron I wouldn't have an iron to work on my xytronic

author: electronics man
author_rank: Frequent Contributor
timestamp: December 12, 2013, 06:06:36 pm
content: but does anyone know how this thing works

author: electronics man
author_rank: Frequent Contributor
timestamp: December 12, 2013, 09:44:18 pm
content: i put a full review on another part of the forum

author: dexters_lab
author_rank: Unknown
timestamp: December 12, 2013, 11:12:33 pm
content: Hard to know how it is controlling temp without more detailMy xytronic lf-1000 uses low voltage from a transformer and a pid controllerYou should always have a backup iron. I am sure i could rustle up an old antex xs if i looked hard enough!

author: electronics man
author_rank: Frequent Contributor
timestamp: December 13, 2013, 03:51:01 pm
content: I might just buy a creepy from maplin
Galvanometer - Page 1
Forum section: electronics / testgear

author: remon404
author_rank: Newbie
timestamp: December 13, 2013, 05:43:33 pm
content: I want to negotiate about every person for what i am thinking about my post. please help me to know graphically describe the dynamic behavior of the galvanometer and which is very important phenomenon for galvanometer.

author: Jon86
author_rank: Frequent Contributor
timestamp: December 13, 2013, 05:45:54 pm
content: http://en.wikipedia.org/wiki/Galvanometer
Seek info: Rohde & Schwarz - Harmonic Filters ATS-0W - model 1000.1755.02 - Page 1
Forum section: electronics / testgear

author: bingo600
author_rank: Super Contributor
timestamp: December 15, 2013, 05:59:26 pm
content: HiAfter having gotten my first SAHP 8594E Spectrum Analyzer 9KHz til 2,9GHz- option 004 = Precision Frequency Reference- option 010 = Tracking Generator 9KHz til 2,9GHz- option 041 = GPIB interface + Parallel Printer Interface- option 101 = Fast Time Domain Sweeps and Analog + Display- option 105 = Time-gated Spectrum Analysis- option 130 = narrow resolution bandwidthsAnd a 85630A - Scalar Transmission/Reflection test setI was thinking that some filters might be a nice thing.So i just won this 19" R&S unit (i think mfg. around Y2K).http://www.airlink.dk/R&S%20ATS-0W.htmBut i cant find anything on the net (nothing) , and would like to get GPIB going if possible.Does anyone have some info on the box ?I have written R&S today , but would try here also. In case R&S were silent.TIA/Bingo
tek rm546hv - Page 1
Forum section: electronics / testgear

author: madcowmoojuice
author_rank: Newbie
timestamp: December 12, 2013, 04:05:10 am
content: Noob with a Tek RM546HV, what probes do I need/where do I find them? Also this thing has been sitting with engines on top of it for years, should I open it up and blow it out? Thanks

author: Unknown
author_rank: Unknown
timestamp: December 12, 2013, 07:05:34 pm
content: Readthis. In short: figure out the input connector (most likely BNC unless it's old enough to use UHF), its input impedance (which probably depends on the plug-in), and find a 10x or switchable 1x/10x probe with the correct connector and a compensation range that includes the input impedance of your scope. You preferably want a probe with at least as much bandwidth as your scope, which shouldn't be a problem for this scope. A cheap, nasty no-name probe from eBay would probably be fine if its compensation range is sufficient. If the scope has a 47 pF input capacitance, then you might have to look a little harder since most modern scopes are in the 10-20 pF range. The voltage rating on cheap modern probes might be lower than the voltage rating of that scope, since voltages inside equipment were much higher in the tube era.I would definitely open it up and check for anything odd. I'm not into old tube equipment, but I believe it's common to reform the caps first and then bring it up slowly using a variac when turning on old tube equipment that has been in storage for years. Searching the archives of either this forum or the Tekscopes Yahoo group should give you more info.

author: madcowmoojuice
author_rank: Newbie
timestamp: December 13, 2013, 06:04:07 am
content: Thanks for the reply, I'll look up the specs on my plug in unit. I think this thing has like a 40 mhz bandwidth, so I'll probably try the cheap-o probe set that I've been looking at.Everything looked fine inside after I freed up the fan, so I brought it up and it seemed to work. It had the two traces going across the crt and all like normal, all the switches worked. Then I turned the horizontal display control again and now all I get is a blur on the screen. I can barely see the ends of the traces if I turn the horizontal position control all the way to the right. I turned it off for a bit and retried, but it's still got the same thing happening even after messing with all the controls. It's like the crt plates shifter or something but I didn't bump it at all, just rotated that one control. I think this happened before but I don't remember how I fixed it, and ideas?Thank you!
Cancelling measurements etc - Page 1
Forum section: electronics / testgear

author: Dave Turner
author_rank: Frequent Contributor
timestamp: November 07, 2013, 10:48:12 pm
content: I'm checking out my new DS1074Z-S. Whilst it's easy to turn on measurements such as 'menu - horizontal - duty'; how do I then turn it off?If you press duty again you get the message 'existed'.Clearly I've missed something.

author: creyc
author_rank: Regular Contributor
timestamp: December 11, 2013, 12:31:59 am
content: I'm sure you've probably figured it out by now, but for anyone else wondering:To remove a measurement tool from the bottom of the screen, select , then , then either press a  key for a specific measurement tool (by number), or All Items to remove all at once.

author: Dave Turner
author_rank: Frequent Contributor
timestamp: December 11, 2013, 09:30:34 pm
content: Thanks Creyc - yup I did figure it out eventually. I see more and more why there have been comments about Rigol's user interface. Some functions are clear and intuitive whereas others are as clear as mud. I'll get there eventually.

author: creyc
author_rank: Regular Contributor
timestamp: December 11, 2013, 10:47:12 pm
content: Yes I agree with that, to a point. However I got my first Rigol scope yesterday, a DS1074Z-S, and I guess I kind of stumbled across this method to clear measurements relatively quickly. I don't know if I'll necessarily remember 6 weeks down the road however. Definitely room for improvement, but it's hard to complain at the price of these things.

author: Dave Turner
author_rank: Frequent Contributor
timestamp: December 12, 2013, 12:08:33 am
content: You're right - I don't have any serious complaints - especially at these prices.I only got my DS1074Z-S a month or so ago and I'm still 'playing' with it to learn how to use it adequately. Considering my previous scopes were both valve based analogues obtained second hand back in the 70's and long since departed to the junk heap in the sky; I'm highly delighted with my new purchase.It's more a series of minor niggles that hopefully the designers at Rigol will eventually address. If they don't then at some stage a rival company will and their market share will decrease.
Fluke 87V Cold Display Question - Page 1
Forum section: electronics / testgear

author: MITTS
author_rank: Contributor
timestamp: December 11, 2013, 02:52:49 am
content: Is there a way to slow how fast the display changes per second? In colder weather the LCD just can't keep up with any quick changes making any reading very difficult to read. Only thing I came up with was to change the range and seems to help. I have a different meter with a internal temp sensor that will automatically slow the display in cold weather for this same reason just wasn't sure if there is a feature like this that can be set on the 87V when needed

author: BravoV
author_rank: Super Contributor
timestamp: December 11, 2013, 03:04:33 am
content: For sure its not a solution, but perhaps this will improve a bit, by enabling the smoothing feature maybe ?By holding the "Range" button when powering it on, display will show "S---" means smoothing feature is on.

author: Robomeds
author_rank: Frequent Contributor
timestamp: December 11, 2013, 03:44:45 am
content: It would seem odd that the meter would slow the rate at which it tries to update the display just because it's cold. However, the cold LCD will respond slowly so I could believe that the bar graph would be useless.

author: retiredcaps
author_rank: Super Contributor
timestamp: December 11, 2013, 07:38:48 am
content: Quote from: MITTS on December 11, 2013, 02:52:49 amHow cold is cold? Manual says operating temperature -20C to +55C. While I can easily test -20C, I have no incentive to!What is the measurement that you are trying to read? Does the reading fluctuate a lot or is it a wide range?

author: MITTS
author_rank: Contributor
timestamp: December 11, 2013, 12:50:01 pm
content: Yes the smoothing feature will probably take care of it. Thanks.This is a new meter for me so only noticed it twice so far and it isn't too cold here yet (20ºF)I'll take some video to help explain.I am taking readings indoors and out sometimes in walk in freezers but typically in and out of those short term.The meter does stay in my service vehicle so when it is cold out my meter is cold and from there I go on a roof or inside.The last time it was an issue was on a ice machine water level sensor that sends between 4.5-5 VDC to a control board depending on the water level position. Another time was just checking simple yes no type of readings between different points in a 115VAC control box. Thanks for the help guys.

author: w2aew
author_rank: Super Contributor
timestamp: December 11, 2013, 05:30:26 pm
content: Hmmm, one example where the old analog VOM has an advantage.

author: MITTS
author_rank: Contributor
timestamp: December 11, 2013, 09:11:55 pm
content: That's ironic. It's been about 20 years since I laid my old roll top Simpson to rest.I think I made the switch to digital back then because they were easier to read lol

author: TopLoser
author_rank: Unknown
timestamp: December 11, 2013, 09:30:36 pm
content: Agilent OLED meter might be a better option in extreme low temps. If the chuffing batteries lasted more than 10 minutes.
any modern electronic noses on the market? - Page 1
Forum section: electronics / testgear

author: ixfd64
author_rank: Frequent Contributor
timestamp: December 11, 2013, 12:01:08 am
content: I'm just curious: are there any up-to-date electronic noses being sold these days?They're supposed to be an emerging technology that is gaining traction (much like thermal cameras), yet I could not find any being sold except for the 13-year-old Cyranose 320. What's really weird is that it's $7,995 price tag has not changed after all those years. Has the market for electronic noses gone stale? Or is the demand just too low?

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 11, 2013, 11:34:30 am
content: i guess, difficult to manufature or miniaturize, unstable or under development. interesting how far we went to Mars yet we failed on this subject. if its available, the demand should be as big as ipad/samsung pad. i also would love to get one to detect if someone shits.

author: amyk
author_rank: Super Contributor
timestamp: December 11, 2013, 11:37:33 am
content: I think the demand for them is far smaller than you think, and many applications could use much cheaper sensors targeted at particular chemicals.

author: apelly
author_rank: Unknown
timestamp: December 11, 2013, 11:43:56 am
content: Quote from: Mechatrommer on December 11, 2013, 11:34:30 amI've got an organic one for that. Unfortunately, by the time the alarm is raised it's already too late.

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 11, 2013, 12:31:27 pm
content: Quote from: amyk on December 11, 2013, 11:37:33 amyou'll never know what a social interaction/demand can be. if there is olphactory sensor and odor producer combined, someone can send his fart online to another globe.

author: dfmischler
author_rank: Frequent Contributor
timestamp: December 11, 2013, 12:45:07 pm
content: Quote from: amyk on December 11, 2013, 11:37:33 amThere arewidely deployed biological unitsthat have demonstrated real effectiveness both at detecting chemical signatures (scents) and also as psychological deterrents. Competing technologies have to demonstrate superior performance and cost-effectiveness, to say nothing of capturing law enforcements' hearts and minds.

author: ixfd64
author_rank: Frequent Contributor
timestamp: December 11, 2013, 05:27:46 pm
content: Quote from: Mechatrommer on December 11, 2013, 11:34:30 amHaha, I figured someone would bring that up.Quote from: amyk on December 11, 2013, 11:37:33 amI'm surprised there is no commercialized device for detecting truffles despite it being a big hype in the early 1990's. Truffles are very valuable, so any detector, even if it costs thousands of dollars, would quickly pay for itself.
RIGOL DG1022U Function/Arbitrary waveform generator - Page 1
Forum section: electronics / testgear

author: sammyhwang
author_rank: Contributor
timestamp: December 11, 2013, 08:49:52 am
content: RIGOL DG1022U Function/Arbitrary waveform generator.I was going to pick up the Rigol DS1052D oscilloscope Dave recommended. But the shop had all sorts of Rigol stuff. I was aiming to buy a function generator but the ones at the shop were either too expensive or crap.(Pictures Attached below)What do you think? Anyone have one? It's a black and white dot matric LCD backlit by some blue leds.Is it a good buy? They are selling it for 250$. Yeah a bit expensive but at least its not some one hung low brand.I like the dot matrix display and nice rugged feel. (sort of)Is it too expensive for what it does? Any other suggestions? I won't really use Arbitrary that much but considering this price range Arbitrary would be nice.

author: Electro Fan
author_rank: Super Contributor
timestamp: December 11, 2013, 09:18:35 am
content: Here is a link to a user review:http://www.nt7s.com/blog/tag/dg1022u/- seems like there are variations of this product (1022, 1022A, 1022U) and they might have various reputations, especially for reliabity and supportmore info:https://www.eevblog.com/forum/reviews/rigol-dg1022u-waveform-was-discontinued/https://www.eevblog.com/forum/testgear/dg1022-vs-dg1022u-(received-the-latter)/http://www.amazon.com/Rigol-DG1022-Arbitrary-Waveform-Generator/product-reviews/B007I0X1K6http://www.tequipment.net/RigolDG1022A.htmlSeems like it might be a reasonable value (ok to good but not fantastic) depending on the working and cosmetic condition but guys here like to get stuff on a deal - you only get oohs and ahhs here if you score something on a big discount or preferrably for free or near free.Someone here here will have some more distinct opinions on this (or possibly some alternatives) shortly, no doubt.I'd say for a Rigol (generally good to very good) and for the features and specs it should be a reasonably good value if the particular unit works well and keeps working well (a little hard to predict, of course)

author: sammyhwang
author_rank: Contributor
timestamp: December 11, 2013, 11:25:06 am
content: For a mid/beginner like me what would you suggest? This or the one dave recommended? (I think that one doesn't have good price to features/quality even)I won't really need arbitrary functions... for now. Maybe in the future?Or does this have too much functions I don't needThis is actually 50 bucks cheaper than my oscilloscope

author: sammyhwang
author_rank: Contributor
timestamp: December 11, 2013, 01:14:33 pm
content: Thanks I think I'm gonna get it. By the way, just out of thought, how much did you purchase your DS1052E at? @TheSolderShack

author: TheWelly888
author_rank: Frequent Contributor
timestamp: December 11, 2013, 05:00:17 pm
content: Last month I ordered a DG1022A from Rigol UK but it is currently out of stock. They made a rather vague claim that the model I ordered has been superseded without telling me what the new model number is supposed to be?!