hybridfree/eevblog-posts huggingface dataset:
Phillips PM2525 multimeter review? - Page 1
Forum section: electronics / testgear

author: Axtman
author_rank: Regular Contributor
timestamp: February 24, 2014, 05:01:12 am
content: Does anyone have own and or use a Phillips PM2525 multimeter? Thanks!

author: MrAureliusR
author_rank: Unknown
timestamp: February 24, 2014, 12:59:44 pm
content: Yes I have owned one for almost a year now.What exactly are you wondering about it?I did a teardown of it on my website, frozenelectronics.com ... also on YT under Frozen Electronics.It's a great basic bench multimeter, the specs are okay but it's not a super-high-precision model. It does the job well for me though, and it does have a 'hi res' mode on most ranges. It's basically a 4 1/2 digit meter for most ranges. The "Probe" input below the regular banana jacks is a proprietary connector that I've managed to reverse engineer with the help of some online pinouts. I've been meaning to make my own 4-terminal probes for a while now. It's a cool feature that is under-used on these models because the original probes are IMPOSSIBLE to find. I've been looking for almost a year trying to find a set of those probes and it's impossible -- there's both a 4-terminal resistance probe and a thermocouple probe for the temperature measurement.The Probe connector also has I2C data on it for calibration when in cal mode. I don't know anything else about that because I haven't messed around with my calibration. My unit seems to be pretty damn close to in cal despite travelling across the continent and then being in one of my moves across the city.The current goes down to 100 picoamps in the lowest range, which is cool. (0.0000uA). The frequency measurement seems to be fairly accurate as well. The capacitance measurement is like any capacitance on a multimeter, it works okay but it's nothing like an LCR meter. It can be good for sanity checks or if a cap has the marking worn off or something. The continuity is pretty slow and non-latching, so it's only useful if you're probing simple things and not something intermittent.Mine has (I think) an RS-232 or parallel port in the back. My power supply (PM2811) and my scope also have parallel/serial connections and I've been meaning to play around with them, but never got around to it.If you have any more questions let me know! I'd be happy to help.
Equipment needed for aligning fm radios And possible tube stuff - Page 1
Forum section: electronics / testgear

author: Napalm2002
author_rank: Regular Contributor
timestamp: February 23, 2014, 11:33:17 pm
content: I am workin on an early 1970s radio and I would like to align the fm section. Ie which sweep generator is best fm generator... Thanks guys I'm new to this aspect and I just want to know what equipment I need and what is good and not. Thanks

author: commongrounder
author_rank: Frequent Contributor
timestamp: February 24, 2014, 03:53:15 pm
content: You need a generator that can do a 10.7Mhz IF sweep. Also it should have a modulated RF output over the 88.1 to 107.9Mhz FM band for front end alignment. There are lots of purpose made FM generators out there. I don't know your budget, but a good one that can be had on the 'bay for around $150.00 (or less, if you are lucky) is the Sencore SG165. It does all the FM signals, including multiplex stereo, and it also has AM RF and IF signals. As a bonus, it has a built in amplifier dummy load and a couple of analog meters for measuring power output, and separation. It is easy to use and they tend to hold their calibration pretty well. I'm sure others will probably have their favorites.

author: Napalm2002
author_rank: Regular Contributor
timestamp: February 25, 2014, 01:10:35 am
content: Thanks a lot. Im going to try and find a sencore on eBay. I love new test equipment!
agilent E4406a marker - Page 1
Forum section: electronics / testgear

author: andrebo
author_rank: Newbie
timestamp: February 24, 2014, 10:37:21 am
content: I have bought an e4406a.But i noted soms strange behavior of the marker in the basic mode.I dont know of this is normal or an misalignment.All test on start up are succes.Span 10 Mhz / 50Mhz unmodulated signaal on CFIf i use a marker and then search ,the freq reading is spot on 50.00000Mhz.But if i move the CF setting to say 55MhzThen marker and search ,and then there is a difference in the marker readingMarker freq is then eg 50.03457Mhz.I do not know if this is normal or i have missed a setting.Does someone have a clue ?Regards.Andre
EasyScope Alternatives - Page 1
Forum section: electronics / testgear

author: Icarus
author_rank: Regular Contributor
timestamp: February 12, 2013, 11:57:54 pm
content: Hello Everyone;I've a ADS-3102B scope, but easyscope software is just bad, really bad.I'm looking any other software instead of EasyScope.Do know any ?THanks for reading this.

author: amspire
author_rank: Super Contributor
timestamp: February 13, 2013, 05:16:54 am
content: Is it the same as the Uni-Trend UT3102B? If so, you could try their software.http://www.uni-trend.com/UT3102B.html

author: Icarus
author_rank: Regular Contributor
timestamp: February 13, 2013, 03:51:28 pm
content: Thaks but It's not working.My scope looks like thathttp://www.elektrovadi.com/dosya/datasheets/Testolcum/ADS3102B.pdfI guess it's a LeCroy clone ?

author: jipihorn
author_rank: Contributor
timestamp: February 24, 2014, 07:09:05 am
content: Hello,I dig up this thread because I'm searching for an alternative to EasyScope when using a Siglent/Atten ADS1102CAL because I couldn't find any way to get an acceptable "real time" display of the oscilloscope on a PC. The best I could find is a screen capture every second which is ridiculously slow. My goal is to capture the scope to make videos that way instead of putting a camera in front of the scope screen.I'm very surprised not to find this basic feature in EasyScope X ; perhaps it's hidden somewhere. I took so much time to make EasyScope to work that I was quite irritated not to be able to see the scope screen on my pc!Jipi.https://www.youtube.com/user/jipihorn
from the rigol ds2000a series to the a-s series - Page 1
Forum section: electronics / testgear

author: ch.onillon
author_rank: Newbie
timestamp: February 23, 2014, 05:45:07 pm
content: hi everybody,do you think the wave form generator is sufficiently interesting to pay the price difference between the a and the a-s version ?already Thanks to everybody for your help.
TDS 540 acq memory map - Page 1
Forum section: electronics / testgear

author: vaualbus
author_rank: Frequent Contributor
timestamp: February 22, 2014, 05:49:33 pm
content: In spite of try to solving my problem on my TDS540 scope, see my back posts, error on self test on the acq memory (adrress 0x73c0046 except data = 0x5555 read 0x5515) I have tried to map the channel 4 memory ic.So every time I've lifted the gnd of sram chip and read the error address via the console port adapter.This is the mapped memory:U111 address: 0x73c0008 except data = 0x8000 actual = 0x80ffU113 address: 0x73c000a except data = 0x8000 actual = 0x80ffU115 address: 0x73c000c except data = 0x8000 actual = 0x80ffU117 address: 0x73c000e except data = 0x8000 actual = 0x80ffU112 address: 0x73c0000 except data = 0x7fff, actual = 0xffffU114 address: 0x73c0002 except data = 0x7fff, actual = 0xffffU116 address: 0x73c0004 except data = 0x7fff, actual = 0xffffU118 address: 0x73c0006 except data = 0x7fff, actual = 0xffffSo apparently the U112 to U118 are the normal acq memory and the others ic are the option 1M ones.Wish that this information could be helpfull for someone.Best regards, Alberto.
What happened to EZ Digital (formerly LG Precision)? - Page 1
Forum section: electronics / testgear

author: Hydrawerk
author_rank: Super Contributor
timestamp: February 23, 2014, 02:27:16 am
content: Hello, is there someone from Korea or Asia? I would like to know what happened toEZ Digitalcompany formerly known as LG Precision. Their test equipment is still being sold as new...http://www.tequipment.net/ez_digital/oscilloscopes/digital-oscilloscopes/http://www.testequipmentdepot.com/ezdigital/analogscopes.htmhttp://www.amt.cz/index.php?id=EZ_DigiBut their stuff looks rather dated. Their official webpagehttp://ezdgt.comseems to be defunct since 2006 or so... But you can still browsehttp://ezdgt.comusinghttps://archive.org/web/Go here:https://web.archive.org/web/20060623003420/http://www.ezdgt.com/eng/product/test/osilo_digital_c.htmlhttps://web.archive.org/web/20030301000000*/http://ezdgt.com
Oops, murdered my tds-360 - Page 1
Forum section: electronics / testgear

author: kc9qvl
author_rank: Regular Contributor
timestamp: February 22, 2014, 09:48:20 pm
content: Blew the both hybrid attenuators out on my scope. 100 watt.s cw signal. Had the scope hooked on the passthough of the rf tap. Cooked the 50 ohm terminator. Arced the input relays and also managed to damage input #2. It still run gets a display. But has spc failure. I kinda liked that scope. Well at least it didn't cost much.

author: VK5RC
author_rank: Unknown
timestamp: February 22, 2014, 10:55:09 pm
content: Commiserations, so easily done, a guy from my radio club told me (i try to follow his advice) before you push the go button on a set up, go and have a cup of tea 1st then come back and re check. By failing to follow his advice I have fried a 5W 2GHz PA. the Tek may be repairable, I would look at itas a project for the future.

author: Psi
author_rank: Super Contributor
timestamp: February 23, 2014, 01:13:23 am
content: As far as scope deaths go, it died well. Measuring a high energy signal instead of sitting alone in a damp garage for years.

author: kc9qvl
author_rank: Regular Contributor
timestamp: February 23, 2014, 03:29:04 pm
content: Well Have a new (too me) toy home now.Tek 2440. Paid to much but I wanted it. Internal calibration was erased by me accidentally(RTFM) so have to recal it. and maybe see about getting a gpib cable and interface
Agilent N9914A Fieldfox - Page 1
Forum section: electronics / testgear

author: Gribo
author_rank: Frequent Contributor
timestamp: February 18, 2014, 01:12:01 pm
content: Hello all,I got an N9914A portable spectrum and network analyzer and I want to add a GPS capability to it, did anyone here use it with a USB GPS dongle? Agilent seems to recommend a 60$ dongle over a 500$ upgrade if an increased frequency accuracy (0.3ppm from 0.7ppm) is not required.Since I do not need the increased accuracy, I wanted to know how reliable is the dongle solution?Thanks.

author: dc101
author_rank: Regular Contributor
timestamp: February 21, 2014, 07:50:34 pm
content: Not sure if there's many differences between the N9914A and the N9912A, but we have the 9912As at work and it doesn't work with my USB GPS. I have a BU-353 USB GPS which is based on the SiRF series of GPS chipsets. According to the N9912A user's guide, it only supports USB GPS units that utilize the uBlox chipset.That being said, if you're using this thing in the field, a USB based GPS is almost certain to break in no time at all. I think the only case where the USB GPS would make sense, would be if you planned on only using the FieldFox in a vehicle where there was some degree of certainty that the UPS connection wouldn't get damaged.Cheers,-Tim

author: dave_k
author_rank: Frequent Contributor
timestamp: February 22, 2014, 12:57:25 am
content: Gribo, I'm pretty sure the attached GPS is only good for adding positional information to plots (ie: where were you when a particular measurement was taken). As far as I know it doesn't improve the measurement accuracy of the instrument itself. To do that you would need to reference the FieldFox using an external 10MHz source - which could be GPS-derived, but not via the USB port.The differences between the 2 models can be compared here:http://www.home.agilent.com/en/pc-1742042/network-analyzer?pm=SC&nid=-33903.0&cc=AU&lc=eng
Siglent SHS 1062 Review - Page 1
Forum section: electronics / testgear

author: CosPhi
author_rank: Regular Contributor
timestamp: February 21, 2014, 10:32:15 pm
content: Hello everybodyI made 3 videos about the Siglent SHS 1062 Handscope. The first video is just about what you get when you buy it. The second video isabout the Multimeter and the last video is about the Scope and the recoding functions.I think I have to make one or two small videos more, to show the good things better, but also the bad things who not really work on this scope.To do this review it was really much more work than I thought. Also the stupid feeling just speak when you are alone in front of the camera (respect Dave).I know the video quality is not the best and I guess I should get a new camera when I do such a thing next time.Software Version is: 3.01.02.01Hardware Version : 1-21-3.3Feel free to ask if you like to know something more ...http://youtu.be/rzdcPeYkzJ8http://youtu.be/GeEj-nI26AUhttp://youtu.be/87KDGM0IF3E
A Ye Olde Quadrant Electrometer (?) - Page 1
Forum section: electronics / testgear

author: CaptnYellowShirt
author_rank: Frequent Contributor
timestamp: February 21, 2014, 08:16:51 pm
content: Someone's going to need to explain this to me:http://r.ebay.com/rCmU5a

author: Prime73
author_rank: Regular Contributor
timestamp: February 21, 2014, 08:21:30 pm
content: http://en.wikipedia.org/wiki/ElectrometerAn electrometer is an electrical instrument for measuring electric charge or electrical potential difference.

author: CaptnYellowShirt
author_rank: Frequent Contributor
timestamp: February 21, 2014, 08:39:24 pm
content: Thanks Wikipedia.Let me be more specific: how does this particular device develop a torque on the mirror section?

author: N2IXK
author_rank: Frequent Contributor
timestamp: February 21, 2014, 08:40:57 pm
content: Looks like an early form of electrostatic voltmeter.http://en.wikipedia.org/wiki/Electrostatic_voltmeter
Recording from DS1102e - Page 1
Forum section: electronics / testgear

author: rexxar
author_rank: Frequent Contributor
timestamp: February 21, 2014, 07:09:31 am
content: Hello all. I'm trying to capture a very intermittent problem. It only shows up three or four times in an hour, so I need a way to capture and record that much data. If I enable long memory on my DS1102e, and put it in roll mode, I can capture about 10 minutes with okay-ish resolution, but I'll have to get lucky to capture it. I tried googling for a solution, but all I found were various tutorials to use the built-in record mode, which is not very useful at all.Basically what I want is to continuously record waveforms onto some storage device, be it a USB drive or my computer. I looked to see if Ultrascope had this feature, but it doesn't really have any features at all. I guess I could set a macro on my computer to have ultrascope tell my oscilloscope to save the waveform every ten minutes, but that seems kind of awful.

author: Mark_O
author_rank: Frequent Contributor
timestamp: February 21, 2014, 05:52:04 pm
content: Quote from: rexxar on February 21, 2014, 07:09:31 amWhy? I mean, I'm confused as to why you need to capture an hour's worth of data, to see something that happens only 3 or 4 times? I guess the logical questions would be: when the intermittent problem occurs, isn't there any distinctive condition you could use to trigger on it? And, when it happens, how long of a duration do you need to be able to see, and at what resolution? Do you need to see all 3 or 4 occurrences? Or would one suffice?QuoteIt sounds like you're not familiar with triggering on conditions? I.e., you're just running in Auto mode? I can tell you for sure that the DS1102E has very powerful triggers, to capture most conditions you could encounter.Fill us in a bit more, and I, or someone else here will be happy to give you some tips.(BTW, the RecordMode you felt was "not very useful at all" is actually fairly powerful. It can monitor for days, and trigger only on events matching your conditions, and capture not just 3 or 4, but hundreds, or even a thousand events. Downside being there's no way afterwards to know when they happened, so it's not useful in all cases.)
Agilent 34401A voltages - Page 1
Forum section: electronics / testgear

author: asp
author_rank: Regular Contributor
timestamp: February 20, 2014, 09:03:13 pm
content: HiCan somebody please help me with the secondary voltages on a transformer for Agilent 34401A. Thing is that I would need that in order to get a new one as I managed to fry mine. I would be interested in the ones to P551 and P751 from the picture below ( which is the actual transformer PN 9100-4972 )If somebody can recommend a replacement part that I can easily find would be even better.Thanks

author: plesa
author_rank: Frequent Contributor
timestamp: February 20, 2014, 09:16:18 pm
content: You can order the new one directly for 37 bucksPart Details: 34401-87901Go to the Agilent website select the 34401 and on right panel in Product Support center is the link for parts.

author: asp
author_rank: Regular Contributor
timestamp: February 20, 2014, 09:24:24 pm
content: Well in my country the price is not listed at all and in UK it's GBP 28.93 but there is no "add to cart"

author: asp
author_rank: Regular Contributor
timestamp: February 21, 2014, 04:13:19 pm
content: Just to answer part of my question:Red - Red = 26V ( that would make the white/gray one 13V from each end )Brown - Brown = 11V ( but the green/white wire I think is just around the whole thing without actually having the other end connected anywhere or it's a foil around this )the rest are still unknown

author: sync
author_rank: Frequent Contributor
timestamp: February 21, 2014, 04:39:55 pm
content: The green/white is connected to a shield winding between primary and secondary. It's for reducing the mains noise on the secondaries. Your replacement transformer should have a shield winding too. And pay attention that 500V are allowed between the measurement circuit (P551) and earth/IO circuit (P751).
Horizontal flickering lines on Agilent U1602B, please advice - Page 1
Forum section: electronics / testgear

author: kamcm
author_rank: Regular Contributor
timestamp: February 20, 2014, 03:29:41 am
content: The LCD screen of U1602B keeps flickering and caused eye strain.How to reproduce?Warm-up the U1602B for 15 minutes and the Horizontal flickering lines will getting worse in default contrast setting.By the way, set the contrast to 76 will make the flickering more obvious.Anyone have the same problem?Is it an individual case or a broader problem?Please advise,Thankshttp://youtu.be/QBML3cBM3mE

author: kamcm
author_rank: Regular Contributor
timestamp: February 21, 2014, 01:42:55 am
content: Anyone have the same instrument and able to confirm it with me ?Is it irregular?Thanks!
AC Voltage Component of DC with Analogue & DMM - Page 1
Forum section: electronics / testgear

author: zenoid
author_rank: Newbie
timestamp: February 21, 2014, 07:11:41 pm
content: hi all - i use an Avo 8 mk6 meter for my model railway hobby & other. - i don't have a DMM.a few days ago my led tv packed in.i thought it was the psu caps however they looked ok so i decided to check the single 12vdc output. that too was ok but when i switched the avo to ac a reading of about 25vac was displayed.i was rather confused by this & posted on another forum regarding. there i was informed that the ac component of a dc source could not be measured correctly using an analogue meter.however regarding a DMM, conflicting advice was given - some said the ac component could be tested others, not.i would therefore be grateful if someone could enlighten me before i buy one.

author: HKJ
author_rank: Super Contributor
timestamp: February 21, 2014, 07:43:45 pm
content: This depends on the meter, some meters has a capacitor blocking DC when measuring AC.If a meter has both AC and AC+DC setting, then the AC settings has a capacitor blocking the DC.

author: zenoid
author_rank: Newbie
timestamp: February 21, 2014, 08:03:19 pm
content: Quote from: HKJ on February 21, 2014, 07:43:45 pmhi HKJ - many thanks for that - by any chance you wouldn't have a make/model that would have that function?

author: HKJ
author_rank: Super Contributor
timestamp: February 21, 2014, 08:12:14 pm
content: Quote from: zenoid on February 21, 2014, 08:03:19 pmYes: Fluke 189, Fluke 289, Agilent U1272A, Gossen MetraHit energyThat is because they are high end DMM's, you can also find many cheaper DMM's with that function.

author: zenoid
author_rank: Newbie
timestamp: February 21, 2014, 10:57:52 pm
content: Quote from: HKJ on February 21, 2014, 08:12:14 pmthanks again.
Energy harvesting: micro power measurement - Page 1
Forum section: electronics / testgear

author: Tweepy
author_rank: Newbie
timestamp: February 18, 2014, 02:28:43 pm
content: I'm designing a hand-held system with 4 solar panels on every side of the case.As the sun exposure is not constant, and handling the device interfere, I would like to know the typical energy available during a full day of use.What's the best approach among:2 cheap PC multimeter, one with a good uA range, like the UNI-T UT 61E2 cheap PC multimeter plus a uCurrentI'm looking for a sub 200$ solution, ideally running Sigrok or at least linux to run it with a laptop in my backpack logging U and I in a spreadsheet.The voltage is from 1 to 8 volts, current from 1uA to 30mA.This bench will be also used for evaluating the power drained by the system (MP430, sleeping at 50Hz, from 1uA to 5mA @ 3.3V)Is recording U and I from different device (not sync) a problem?I'm looking for any hint in this setup, but also recommendation for 2 nice multimeter reference fitting the bill (and my budget). (I dont like 9V battery, I would prefer 2xAA and USB of course is nicer than RS232 to avoid converter)

author: taemun
author_rank: Regular Contributor
timestamp: February 18, 2014, 03:00:36 pm
content: (This might be better suited to the Projects, Designs, and Technical Stuff forum, not sure.)Four solar panels, one each side? Are you planning on putting those in serial or parallel? Either way, you'll probably be doing more harm than good:http://en.wikipedia.org/wiki/Photovoltaic_system#Shading_and_dirtYou may be able to get away with summing diodes.

author: Tweepy
author_rank: Newbie
timestamp: February 18, 2014, 05:59:55 pm
content: Quote from: taemun on February 18, 2014, 03:00:36 pmYes, maybe, but it's more about measurement than project design itselfQuote from: taemun on February 18, 2014, 03:00:36 pmOf course, there will be bypass schottky diode on each solar panel. The device has many mounting possibilities and cannot rely on one panel.

author: Marco
author_rank: Super Contributor
timestamp: February 18, 2014, 06:13:23 pm
content: Quote from: Tweepy on February 18, 2014, 02:28:43 pmWhy would the voltage vary? Won't you use it to charge a battery or something at fixed voltage?

author: Tweepy
author_rank: Newbie
timestamp: February 19, 2014, 09:53:41 am
content: Quote from: Marco on February 18, 2014, 06:13:23 pmSimple answer:http://en.wikipedia.org/wiki/Maximum_power_point_tracking

author: Tweepy
author_rank: Newbie
timestamp: February 20, 2014, 08:03:51 am
content: I think the UNI UT61E is fine for this job: 20kcounts, 2 values per sec, and run USB/HID on Linux :http://translate.googleusercontent.com/translate_c?depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&tl=en&u=http://diyftw.de/wiki/doku.php%3Fid%3Dprojekte:ut61e&usg=ALkJrhho3tD4oG25B4KTU-jEOLJxMVXiBg#links
NORMA D4155 precision power meter WATTMETER - Page 1
Forum section: electronics / testgear

author: Steve Gare
author_rank: Newbie
timestamp: February 13, 2014, 12:37:50 pm
content: I've just aquired a NORMA D4155 precision wattmeter from ebay. Does anybody know how to use this model or does somebody have a manual for it. The unit powers up so I presume it's working. I am new to electronics and don't wish to blow this baby up by doing the wrong thing so haven't tested it any further.

author: Steve Gare
author_rank: Newbie
timestamp: February 20, 2014, 07:06:14 pm
content: HELP!!!!I'm also looking for a manual has anybody got any information on this unit that they would kindly share with me?

author: Vgkid
author_rank: Super Contributor
timestamp: February 20, 2014, 08:13:17 pm
content: You could try asking on this yahoo group.https://groups.yahoo.com/neo/groups/Manual_Exchange/info

author: Steve Gare
author_rank: Newbie
timestamp: February 20, 2014, 09:01:27 pm
content: Thanks I appreciate your help.I've applied to join that group and hopefully somebody there can help me with a copy of the manual.Regards Steve Gare
MetraHit 30M PCB evolution - Page 1
Forum section: electronics / testgear

author: Wytnucls
author_rank: Super Contributor
timestamp: February 19, 2014, 10:47:02 pm
content: Here is a comparison between two 30M PCB layouts, one dated 2002 and the other 2012.There have been quite a few changes over 10 years, showing that Gossen is either always trying to improve on the original design or that some components are in short supply and alternative solutions have to be implemented.Slightly disconcerting on such an expensive meter, is what looks like a bodge 47uF electrolytic capacitor on the newer model.The one on the right is the newer 30M.

author: Wytnucls
author_rank: Super Contributor
timestamp: February 19, 2014, 11:12:55 pm
content: Here is a close-up of the bodge cap (probably smoothing cap, measured at 16V) :

author: Wytnucls
author_rank: Super Contributor
timestamp: February 20, 2014, 12:03:00 am
content: Maybe not so unusual on Gossen meters, since Dave had a bodge resistor on his MetraHit Energy.German engineering at its best....not!

author: don.r
author_rank: Frequent Contributor
timestamp: February 20, 2014, 01:17:36 am
content: For a bodge its fairly nicely done. Neatly bent leads and all.

author: Wytnucls
author_rank: Super Contributor
timestamp: February 20, 2014, 01:35:37 am
content: You can put lipstick on a pig, but it's still a pig!

author: don.r
author_rank: Frequent Contributor
timestamp: February 20, 2014, 01:55:54 am
content: Nice shade of lipstick though.
DS2072A hackable or not? - Page 1
Forum section: electronics / testgear

author: tom66
author_rank: Super Contributor
timestamp: February 19, 2014, 06:29:39 pm
content: Forgive me for not reading through the full Rigol hack thread but I read somewhere that the Rigol DS2072A cannot be hacked for maximum bandwidth and options. Is this still true? Is DS1074Z hackable too?Currently struggling to decide which scope to get, being hackable would be the major factor I think.Thank you

author: Sparky
author_rank: Frequent Contributor
timestamp: February 19, 2014, 06:39:42 pm
content: Quote from: tom66 on February 19, 2014, 06:29:39 pmThey're both hackable...all options...so I guess that doesn't make your decision any easier!
Siglient SDG1025 mains plug - Page 1
Forum section: electronics / testgear

author: Rascal
author_rank: Contributor
timestamp: February 19, 2014, 02:18:56 pm
content: Im interested in buying the Siglient SDG1025 AWGAfter various emails to distributors here in the UK to find out about warranty etc I am left a bit confused as to what mains plug is fitted. Most advertisements state the 'fitted plugged' is correct to the country of destination, however email replies contradict this - some state US plugs are fitted as standard to all the Siglient range - this I cant imagine is correctObviously the type of plug fitted doesn't necessarily matter as long as the equipment is ready for UK voltage.Anyone know if this equipment comes fitted with a particular mains plug fitted as standard?Does the UK version of this equipment differ to US version (other than voltage)?ThanksPaul

author: commongrounder
author_rank: Frequent Contributor
timestamp: February 19, 2014, 02:40:45 pm
content: Rascal:The SDG1000 series is fitted with a standard IEC power input receptacle, so you can attach the appropriate power cable to the unit. Mine came with a couple of different cables with US and European plugs.This unit uses a switching power supply and works over a wide voltage/frequency range. Quoted from the back panel of my unit: "Line - 100-240V (at) 45-66Hz - 100-127V (at) 45-440Hz 50VA Max.Hope that helps.

author: Rascal
author_rank: Contributor
timestamp: February 19, 2014, 02:52:55 pm
content: Thanks Commongrounder - You have answered my question.Thank you for your prompt reply and help.Paul

author: Len
author_rank: Frequent Contributor
timestamp: February 19, 2014, 03:19:29 pm
content: Quote from: commongrounder on February 19, 2014, 02:40:45 pm400 Hz AC so you can use it in an airplane or a submarine!

author: commongrounder
author_rank: Frequent Contributor
timestamp: February 19, 2014, 03:42:53 pm
content: Yeah.... I'm sure that is a large target market for their generators!
Old oscilloscope HP 1740A horizontal deflection problem, help! - Page 1
Forum section: electronics / testgear

author: SAUL BRITTO
author_rank: Frequent Contributor
timestamp: February 18, 2014, 07:25:35 pm
content: Hi. I bought an old hp 1740a and after any hard hard work,it worked!But,it's horizontal trace isn't right,it does not complete to the right side and left side,just when i turn on the MAG X10. I found any bad resistors on the horizontal out,but it's problem persists.Sorry for my english! Thank you.normal> -----X10 MAG> ----------

author: Kilroy
author_rank: Regular Contributor
timestamp: February 18, 2014, 09:26:56 pm
content: Check the Sprague 100uf wet tantalum capacitor on the horizontal sweep board.Is this a problem on all sweep speeds or mainly the slower settings?

author: SAUL BRITTO
author_rank: Frequent Contributor
timestamp: February 18, 2014, 10:00:21 pm
content: Kilroy>> It's on all the sweep times,just normalizes when in mag x10.Thank you.

author: SAUL BRITTO
author_rank: Frequent Contributor
timestamp: February 18, 2014, 10:13:16 pm
content: replaced the tantalum for common electrolytic, with no changes.

author: SAUL BRITTO
author_rank: Frequent Contributor
timestamp: February 19, 2014, 12:20:51 am
content: My friends,my problem is resolved,was A7R93 1k ohms.On the manual i read: The X1 sweep speed is calibrated by emitter resistor A7R93,then... just a touch with a screwdriver and scope come back to life,this is the time effect over a 40 years trimpot! thank you all.
Philips PM3207 fault - Page 1
Forum section: electronics / testgear

author: Blaffetuur
author_rank: Regular Contributor
timestamp: February 17, 2014, 02:20:05 pm
content: Yesterday I boughtscope 2nd hand for €40 =)Brought it home, turned it on and I got.I didn't have probes so I couldn't really test it, but I could change de vertical position, in xy mode I got a dot and when changing the volts/div you saw the line get "distorted".After playing with the knobs for a while all I've got was 1 line on screen.=(I think it was when changing the trigger from ac to tv but I'm not shure.Now I can't adjust the vertical position and in xy mode I get nothing.Hereis a video of me noodeling with the knobs.Also on theit says 220V and I230V, is this a problem?Hereis the manual.Today I've got probes and when connecting the probe to probe adj. I also get notting.Hereis a video af that.Does anyone have an idea?ThanksEdit: In the video's it's on ADD but I tested it and on A&B it does the same thing.(Edit2: or maby it happend when switching between alt and chop mode)

author: London Lad
author_rank: Regular Contributor
timestamp: February 17, 2014, 02:33:57 pm
content: Its doing more or less what I would expect it to do.Switch the AB / ADD switch back to AB

author: Blaffetuur
author_rank: Regular Contributor
timestamp: February 17, 2014, 02:43:05 pm
content: Quote from: London Lad on February 17, 2014, 02:33:57 pmWhen I switch to A&B it gives me the same result.

author: London Lad
author_rank: Regular Contributor
timestamp: February 17, 2014, 03:16:56 pm
content: Connect your probe to channel A and take it off the probe adjust clip. If its got a switch on it,set it to x1Adjust the 'volts/div' and 'trigger level' and you should see noise when you touch the probe tip with you finger.

author: Blaffetuur
author_rank: Regular Contributor
timestamp: February 17, 2014, 03:39:06 pm
content: Quote from: London Lad on February 17, 2014, 03:16:56 pmTried it, can't see noiseVideo, sorry if the video seems a bit rushed :p

author: London Lad
author_rank: Regular Contributor
timestamp: February 17, 2014, 05:01:50 pm
content: I can't see the triggering in your last video.Use input A then set triggering to 'A' '+' 'INT' and 'AC' then use the small trigger level knob.Try a paper-clip in the A BNC just to check your probe isn't shorted.If you cant see any noise try probing a battery.

author: Blaffetuur
author_rank: Regular Contributor
timestamp: February 17, 2014, 05:23:19 pm
content: Quote from: London Lad on February 17, 2014, 05:01:50 pmTried everything you said but still the same stupid line.
Tillquist DT-447 TRUE RMS / Model 187 Fine Instruments Corp - Page 1
Forum section: electronics / testgear

author: wiss
author_rank: Frequent Contributor
timestamp: February 05, 2014, 09:09:34 pm
content: My first multimeter, bought in -93, suffered some damage some time ago.As I remember I plugged it into 230VAC when it was on the ohms-range.Now it only measure low values of resistance, Infinity is currently mapped to 2.3 kOhm.Does anyone have any clue to what might be damaged?

author: retiredcaps
author_rank: Super Contributor
timestamp: February 06, 2014, 12:02:38 am
content: Quote from: wiss on February 05, 2014, 09:09:34 pmI would check the PTC (just right of VR1). Measure the resistance of it and report what you find. I'm guessing a good one will be in the 1,000 to 1,500 ohm range. If yours reads something like 100,000 ohms, it is likely bad.If I'm correct, you can replace the PTC with a normal 1,000 ohm resistor for test purposes.

author: wiss
author_rank: Frequent Contributor
timestamp: February 09, 2014, 04:51:19 pm
content: The PTC measures 1.1k, but that got me looking at the traces, the inside end of the PTC is connected to a diode-bjt (Q2 PN2222), after replacing that one with a bc546 it now works again!

author: retiredcaps
author_rank: Super Contributor
timestamp: February 09, 2014, 10:52:03 pm
content: Good job finding the problem. Was Q2 shorted?

author: wiss
author_rank: Frequent Contributor
timestamp: February 10, 2014, 07:38:17 am
content: I didn't measure the transistor.Before it only went up to 2.5k with open leads, now I could measure a 500k resistor and it goes overload when open.This one is using low voltage in resistance, a parallel diode should not influence the resistance measurement (according to the manual).

author: Jon86
author_rank: Frequent Contributor
timestamp: February 10, 2014, 08:16:28 am
content: Well there's your problem, rubbish multimeter. It doesn't pass Daves '230V on the Ohms range' test

author: wiss
author_rank: Frequent Contributor
timestamp: February 10, 2014, 08:28:36 am
content: It actually looks quite a bit more professional on the outside than on the insideYes, it is re-branded crap! But not the worst I (we) have seen.

author: wiss
author_rank: Frequent Contributor
timestamp: February 16, 2014, 08:41:27 pm
content: I went to my parents this weekend, and what was lying on the kitchen bench when I got there? The manual for the DMM!It claims to be tested according to IEC Publication 348 (whatever that is) and be able to take 600 VDC or Peak AC on all ohms-ranges as well as Beeper and Diode ranges.
TPI-153 teardown - Page 1
Forum section: electronics / testgear

author: fqahmad66
author_rank: Regular Contributor
timestamp: February 15, 2014, 07:05:48 pm
content: My TPI-153 teardown - Part 1

author: fqahmad66
author_rank: Regular Contributor
timestamp: February 15, 2014, 07:11:09 pm
content: part-2

author: retiredcaps
author_rank: Super Contributor
timestamp: February 15, 2014, 11:49:09 pm
content: Thanks for the pictures. Better late than never!These meters are also made for Snap-on and Bluepoint. I always wondered what it looked like inside.I can't find any info on the Summit-8 IC. I can't even find the company Summit (presumably based out of Japan)?I also can't think of which Korean manufacturer who might be making these for TPI/Snap-on/Bluepoint.

author: Wytnucls
author_rank: Super Contributor
timestamp: February 16, 2014, 08:27:32 am
content: Summit/TPI is a small Korean multimeter company (53 employees) based in Inchon.The DMM ADC is probably a relabeled Japan product.http://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=summit+multimeterhttp://www.summit.co.kr/product/pro02.htm

author: fqahmad66
author_rank: Regular Contributor
timestamp: February 16, 2014, 11:05:30 am
content: I bought it from digikey couple of years back. Still gives accurate readings..checked it with 0.05% resistors. The fuses are unmarked but 600V is punched on caps. I am happy with it..particulary when it is powered by 2AA cells.

author: retiredcaps
author_rank: Super Contributor
timestamp: February 16, 2014, 04:42:50 pm
content: Quote from: Wytnucls on February 16, 2014, 08:27:32 amThanks for the links. I would not have thought of using alibaba as a search engine.

author: retiredcaps
author_rank: Super Contributor
timestamp: February 16, 2014, 04:52:24 pm
content: Quote from: fqahmad66 on February 16, 2014, 11:05:30 amIf you like it, that is all that matters.I'm a fan of the AA meters as well, but you have to be aware of potential battery leaks.I noticed the 153 manual states 200 hours battery life which would imply a 12mA current consumption assuming 2400mAh AA alkaline. At 12mA, that would be more than double the Ideal multimeter in Dave's $100 multimeter shootout.
Temp probe for Fluke 87-v question? - Page 1
Forum section: electronics / testgear

author: p5200
author_rank: Contributor
timestamp: February 20, 2014, 12:33:02 am
content: I just got this meter a few day ago, and don't understand what components etc. it is suppose to be able to measure. Could someone please fill me in? The manual doesn't tell unless, I overlooked that part. Thanks!

author: Pasky
author_rank: Regular Contributor
timestamp: February 20, 2014, 12:44:51 am
content: Place it on a hot IC? See how hot a regulator is getting?

author: Nerull
author_rank: Frequent Contributor
timestamp: February 20, 2014, 12:49:45 am
content: ...anything?It's a thermocouple. It will measure the temperature of whatever you touch with it. Your hand. A hot IC. The room. Your bathwater.

author: p5200
author_rank: Contributor
timestamp: February 20, 2014, 02:24:48 am
content: Thanks very much folks, I was hoping I could use it for testing the temp of ICs etc. that way.
Siglent SDG5162 Arbitary Waveforms - Page 1
Forum section: electronics / testgear

author: DJROCK
author_rank: Newbie
timestamp: January 09, 2014, 03:40:59 am
content: We have a Siglent SDG5162 Arbitrary Function Generator in our lab which we picked up for generating waveforms.I wanna put a tutorial together on the subject ofArbitrary Waveformsso anyone with an idea or two please let me know.Thanks

author: kebogen
author_rank: Contributor
timestamp: January 09, 2014, 03:21:28 pm
content: :clap:Great,but what kinds of tutorial you plan to make?

author: DJROCK
author_rank: Newbie
timestamp: January 13, 2014, 12:09:05 pm
content: I'm thinking about a tutorial on using the EasyWave software to create custom waveforms.I wrote an opening paragraph....it goes something like this:The SDG-5162 is part of the SDG 5000 family of DDS based Arbitrary Waveform Generators manufactured by Siglent. The 5162 is the company’s flagship model which produces a maximum frequency of 160 MHz.The 5162 utilizes Siglent’s proprietary “Easy Pulse” technology, providing two DDS output channels which can be configured to produce Sine, Square, Ramp, Pulse, Gaussian-Noise or Arbitrary waveforms. Outputs can be modulated with AM, DSB-AM, PM, FM, FSK, ASK and PWM.Arbitrary waveforms can be created by the end-user with the included PC based program called “Easy Wave” then uploaded to the 5162 with USB, or the software can be used to directly control the 5162.This tutorial focuses on the creation and use of “arbitrary” waveforms.

author: kebogen
author_rank: Contributor
timestamp: January 14, 2014, 01:15:29 am
content: Quote from: DJROCK on January 13, 2014, 12:09:05 pmwow, that is great, I have a SDG1050, a very great generator, I just want to disassemble it or do some other, maybe I can join you.

author: DJROCK
author_rank: Newbie
timestamp: February 16, 2014, 05:58:10 am
content: Downloading the SoftwareSiglent's EasyWave software application can be downloaded from here:hxxp://www.siglent.com/en/server/download.aspx?nodecode=119004002003(NOTE: change hxxp to http)In order for EasyWave to work correctly, additional software, called NI-VISA, is needed.NI-VISA can be downloaded directly from here:hxxp://www.ni.com/visa/(change hxxp to http)NI-VISA stands for "National Instruments - Virtual Instrument Software Architecture".I'm running NI-VISA 5.4 for Windows on my XP driven workbench computer.

author: DJROCK
author_rank: Newbie
timestamp: February 16, 2014, 06:01:30 am
content: Windows Computers OnlySiglent's EasyWave works on the following Windows Operation Systems:1. Windows 2000, Windows XP2. Win7 - 32bit and 64bit3. Vista - 64bit
Made a reasonable Ebay score - Page 1
Forum section: electronics / testgear

author: at2marty
author_rank: Regular Contributor
timestamp: February 15, 2014, 11:11:22 pm
content: I just bought a couple of bench top meters on Ebay that I think turned out to be a pretty reasonable deal.Both combined were $60 US + $10 US shipping.The first is a Keithley 175. The only issue that I have with it so far is it doesn't seem to want to come out of Auto Range. Selecting a range button doesn't seem to do anything, and "Auto" is shown on the display. Even with that, checking it on my voltage standard (Fluke 3330B) I get the following measurements.Voltage Standard Setting Measured Voltage100mv 99.95mv1V 1.0002V10V 10.002V100V 100.02V999.9999V 1000.2VI would say that is pretty darn accurate for a 20+ year old instrument. The only other issue that I have is a cracked case.The second is a Keithley 191. The main problem that I have with it is fluctuations, ie., the measurement isn't steady. Here is what I measured.Voltage Standard Setting Measured Voltage100mv 101.948mv - 102.031mv1V 1.00593V- 1.0063610V 10.023V - 10.096V100V 100.31V - 100.81V999.9999V 1004.32V - 1004.84VI'm thinking maybe a few faulty electrolytic caps in this instrument. Though the measurement is close enough for the hobby stuff that I do, I really want it to be stable. This should be a fun one to work on.

author: retiredcaps
author_rank: Super Contributor
timestamp: February 15, 2014, 11:52:55 pm
content: Quote from: at2marty on February 15, 2014, 11:11:22 pmI bought an used one last year, but beyond powering it on and doing some quick checks, I haven't used it all. It did match my Fluke 87V in DCV. And yes, it is easy to crack the case as I found out.QuoteYes, possibly contamination on the pcb from leaked caps?

author: at2marty
author_rank: Regular Contributor
timestamp: February 16, 2014, 05:38:05 am
content: I let the meters run for a while on my Voltage Standard so that they warm up. The 175 is pretty much "spot on" and agrees with my HP3468B. It's kind of nice having two meters that will read down into the mv range with fair accuracy. The 191 does need a bit of work though. It still jumps around and though it seems to read fairly accurate, the voltage and resistance readings are not stable. Perhaps I'll do a "tear apart" video and document what I find with this meter.Over all, I can't bitch too much for $60 US plus shipping. These meters will be a nice addition to my bench!
Need help deciding what scope to buy with a given budget - Page 1
Forum section: electronics / testgear

author: glowman
author_rank: Contributor
timestamp: February 15, 2014, 10:26:27 am
content: I need to buy a new oscilloscope for the following needs:1. Troubleshooting/tracing signals mostly from switching PS or industrial equipments.2. Occasionally, design some high frequency power devices. (<5mhz) and usually needs just 2 channels3. Been using Iwatsu analog scope and not so much familiar with DSOConsiderations:1. Want to buy something that is around 100mhz, hopefully 200mhz DSO that does not go beyond USD1600. Best bang for the buck for that budget.2. I know my needs are just on low end DSO but, want something with a little future proofing. Want to avoid regretting later why I did not get the higher one.3. Frustrated with reading about bugs found on Rigol/Owon/Instek etc. China scopes so, considering to buy Agilent DSOX2102A (since they currently have promo of getting higher bandwith for price of lower bandwith).4. Or I might be wrong, China scopes are better than the Agilent's. Bugs still prevalent in Agilent'sHope someone can help.

author: electronics man
author_rank: Frequent Contributor
timestamp: February 15, 2014, 09:01:40 pm
content: There are bugs in all scopes. And consider the rigol ds1000z or ds2000

author: echen1024
author_rank: Super Contributor
timestamp: February 15, 2014, 09:38:38 pm
content: What about a Hameg HMO?
Rigol 2000 series remote control - Page 1
Forum section: electronics / testgear

author: npelov
author_rank: Frequent Contributor
timestamp: February 15, 2014, 09:30:57 am
content: Hi,I installed the software from the CD and I expected some basic remote control of the oscilloscope by LAN or USB. What I find is just an information about the scope. The web interface is only informative. The Ultra Sigma or whatever it's name is, is just a base for other software and the only software that came with the scope is trial. What? I get remote control even with cheap scopes.So my question is: Are out there any decent programs to do basic control of the scope and capture screens. My computer is a bit far from the work bench and it is nice that the scope has LAN, but lack of software ... or I didn't search enough?

author: Rerouter
author_rank: Super Contributor
timestamp: February 15, 2014, 09:49:19 am
content: look at daves rigol 2000 vs 1000 video he uses a bit of software created by a forum member here to do something like what your after,

author: npelov
author_rank: Frequent Contributor
timestamp: February 15, 2014, 10:31:52 am
content: I just checked it. It's a nice tool, but it's mostly for viewing of records and does not feature remote control. You still need to have access to the scope. But it's useful - I like it.
Multimeter £100 - Page 1
Forum section: electronics / testgear

author: banedon
author_rank: Regular Contributor
timestamp: February 14, 2014, 10:56:21 pm
content: Hi guysI'm after a bit of advice on buying a digital multimeter. I've got one analogue-style one from 1 million BC and a very cheap hand held pocket style one. Both are worn out and almost not usable.I've had a look at a number of video's (including Dave's) and am at a loss to choose.I need the best one I can find for for approx £100. I'm not too fussed about AC as I want to build mostly digital circuits and won't be dealing with the mains.Does any one have any suggestions based on experience?Any help would be appreciated

author: electronics man
author_rank: Frequent Contributor
timestamp: February 15, 2014, 12:07:39 am
content: Extech ex505?

author: Lightages
author_rank: Unknown
timestamp: February 15, 2014, 05:32:40 am
content: Well in that price range there are a few good options. It seems however that none are perfect at this price.Amprobe AM-270 $90USD plus shipping, horrible back light, safe for almost anythingAMPROBE 37XR 120 Euro plus shipping, great overall meter, more features than most, horrible burden voltage on current range, slow continuityBrymen BM257 $135USD including shipping, full featured, fast continuity, uses AAA batteries, well built, safe for almost anything you might use it on, optional PC connectionUni-T UT71D $160USD including shipping, full featured, slow continuity, includes PC connection and software, internal logging capability to 10,000 points, slow in some cases, OK build, high voltage burden for current measurement.So pick features vs quality vs build. I have the UT71E, BM257, and if I were to pick amongst the above models I would probably pick the BM257 again. The UT71D is a good bench choice too if you understand and can live with the shortcomings.