hybridfree/eevblog-posts huggingface dataset:
Keysight 3000T bandwidth upgrade licenses finally shipping. - Page 1
Forum section: electronics / testgear

author: GlowingGhoul
author_rank: Regular Contributor
timestamp: September 09, 2015, 02:57:49 pm
content: After a delay of several months, the 100 to 200 MHz and 300 to 500 MHz bandwidth upgrade licenses are finally shipping, for those who've been waiting for these.Got my 100 to 200 license from Newark for $430.

author: dadler
author_rank: Unknown
timestamp: September 11, 2015, 09:01:28 am
content: I ordered a bandwidth upgrade license from Newark at the beginning of August. I was told it was backordered until September (and Newark blamed this on Keysight). I phoned Newark on 6 occasions and was given constantly changing backorder dates.An engineer from Keysight saw my post on this forum, where I said that Newark claimed the license certificates were backordered by Keysight.I was told directly by Keysight that this was not the case-Keysight was not backordering entitlement certificates. The codes are ordered, generated and billed via a web application. It's self-service by the distributor.This is a Newark problem, they do not have their act together.With my order information, Keysight contacted Newark on my behalf, and I immediately got a shipment notification for the entitlement certificate. It had "magically" turned up in stock at Newark.But get this-I receive the package and it turns out that Newark next-day-aired me an empty envelope. No kidding, they sent me the envelope for an entitlement cert, but it contained no entitlement certificate. At least they sent the giant 18"x20" box (containing no license!) next day air!I contacted the engineer at Keysight again, and they decided to cut out the distributor and generated the code for me directly. They also called Newark, and got them to email me the missing entitlement certificate (for my records). So I've had my bandwidth upgrade installed for about 2 weeks now.For all of my trouble, Keysight graciously offered me a bonus, which turned a very frustrating situation into a very positive oneKeysight has top-notch customer service. I am still impressed with Keysight's handling of the situation.Oh yeah, Newark also overcharged me nearly $100, and I had to make two phone calls and explain basic math to two agents to get it sorted out.Anyways, Newark is a bunch of incompetents. Never buy license certificates from them, they do not understand the process.Original drama here:https://www.eevblog.com/forum/testgear/rigol-ds4000-series-vs-keysight-3000t-better-value/90/
Suggestions for test equipment? - Page 1
Forum section: electronics / testgear

author: Jesset1996.5
author_rank: Regular Contributor
timestamp: September 11, 2015, 02:53:18 am
content: Hello everyone! Im thinking of getting some new electronic tools and or test equipment and i was wondering what i should get. I already have a 50V 50A variable lab bench power supply, a lab bench multimeter and a analog oscilloscope. I am looking to get a newer oscilloscope, a soldering iron, a de solder pump maby even something for static electricity protection exc. Any suggestions for brands or even tools i should get?

author: Jesset1996.5
author_rank: Regular Contributor
timestamp: September 11, 2015, 02:57:01 am
content: Quote from: Jesset1996.5 on September 11, 2015, 02:53:18 am
Digital Oscilloscope - Page 1
Forum section: electronics / testgear

author: Sebeom
author_rank: Newbie
timestamp: September 11, 2015, 03:40:50 am
content: Hello,I have a plan to design a digital oscilloscope. The ADC sampling rate is 5GSPS. We will get the ADC data using FPGA. We need higher sampling rate for high-end oscilloscope. So we consider the ETS(Equivalent Time Sampling). In case of random ETS, we need to know the time of ADC clock rising edge after trigger event using TDC(Time to Digital Converter). I think this job is very challenging because TDC time resolution need to be around 10ps. Is there anyone who has a good idea to implement the higher sampling rate using the other method?Thanks, Sebeom
agilent/keysight lab power supply E3642A vs U8002A - Page 1
Forum section: electronics / testgear

author: snobwall
author_rank: Newbie
timestamp: September 10, 2015, 10:12:36 pm
content: Hi guys and gals. I can't make my mind over which one of mentioned above is right one to go for.150$ in price difference make it tough one to decide on. Is programmable option/function enough of justification for price tag?pls help.And lets say the designation isn't right now the biggest factor, is it really worth extra cash for more advanced model ?

author: D3f1ant
author_rank: Frequent Contributor
timestamp: September 11, 2015, 02:27:26 am
content: imo, no but it depends.They are not really comparable, its going to come down to what you really need it for.The E3642A is much lower power, and has connectivity via serial gpib. The U8002A is a big beasty grunter,with no connectivity at all. If you dont need that much power, the U8001A is even cheaper. Do you need connectivity or current?In my opinion the U8000 series is good value for high quality supply. If you do need remote control or monitoring, the much more moderne36100 series has usb/lan, but is expensive. If you want lots of bells and whistles, rigol 832 is hard to beat.
Fluke Discontinued Dates (Warranty-Related Question) - Page 1
Forum section: electronics / testgear

author: pops
author_rank: Newbie
timestamp: September 10, 2015, 02:24:14 pm
content: Is there a place on the Fluke website to view the dates when equipment is discontinued or out of production?Or a place where I can view if I registered my Fluke 189?The warranty says they will honor the repairs for up to 7 years after they discontinue a product, but I have no idea when my multimeter was discontinued or if I registered my purchase.I called into the Fluke to ask. They said the unit was in warranty, so I sent it in for repair.Then, someone from Fluke emailed me and said the tech has the final determination of warranty status, and the unit was out of warranty.I asked why I was told incorrectly the first time, and they didn't answer the question and told me to show proof of purchase within the last 10 years. When I asked again, they said the person on the phone made a mistake.I asked when the Fluke 189 was discontinued, and have not heard back yet.

author: prot_brot
author_rank: Contributor
timestamp: September 10, 2015, 08:36:11 pm
content: Fluke 287/289 which supposedly replace the 189 was launched around 2007/2008. So yeah, it's been 7 years since then.
New Rigol scope: Temporary option licenses? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: September 10, 2015, 12:09:54 am
content: Hi, just got a 1074Z and I see most of the option codes are temporary with a 36 hour timeout. Question: Is that 36 hours of power-on time, or 36 contiguous hours regardless of on/off state? Thanks.

author: fivefish
author_rank: Frequent Contributor
timestamp: September 10, 2015, 12:12:58 am
content: Who cares... just hack it and make it official license.

author: eas
author_rank: Frequent Contributor
timestamp: September 10, 2015, 12:22:15 am
content: Quote from: cvanc on September 10, 2015, 12:09:54 amPower-on time.

author: cvanc
author_rank: Frequent Contributor
timestamp: September 10, 2015, 01:47:08 pm
content: Quote from: fivefish on September 10, 2015, 12:12:58 amOh, I'll get there - just want to get a little more than one day into my warrantyThanks.

author: cvanc
author_rank: Frequent Contributor
timestamp: September 10, 2015, 01:47:52 pm
content: Quote from: eas on September 10, 2015, 12:22:15 amExcellent - thank you!
Is Rigol DSA1000A supposed to be better than DSA800 ? - Page 1
Forum section: electronics / testgear

author: ivonenand
author_rank: Contributor
timestamp: September 09, 2015, 08:43:34 pm
content: Hi guys,I was always under the impression that the DSA1000A series are the newer and better signal analyzators than the DSA800 series.However, on the Batronix website, the pricing is the following:DSA832-TG....5990€DSA1030A-TG....4250€So what's going on here? Shouldn't DSA1030A be cheaper than DSA832?Regards,Ivo

author: Matje
author_rank: Regular Contributor
timestamp: September 09, 2015, 10:59:27 pm
content: Quote from: ivonenand on September 09, 2015, 08:43:34 pmBut, but, it actually is cheaper, or not? ;-)At first look the DSA8xx have better noise floor specs than the DSA10xx, but this may be a trick with specs. It is possible that a newer design is cheaper to produce - because optimization and stuff. Maybe Rigol has not yet learned the usual tricks of product/price segmentation?In the end you will have to compare the complete specs and, ideally, get devices to actually test to make a reasoned decision.

author: Orange
author_rank: Frequent Contributor
timestamp: September 10, 2015, 07:21:17 am
content: The DSA832 has better SSB phase noise specs, it is -98dBc/Hz at 10kHz. The DAS1030A has 88dBc/Hz.The DSA815 has -80dBc/Hz at 10kHzSo yes the DSA832 is better, however I think they are overpriced.
Rigol DP800 Programming Error Messages - Page 1
Forum section: electronics / testgear

author: whitneyrm
author_rank: Newbie
timestamp: September 10, 2015, 04:36:14 am
content: I'm using Excel 2013 VBA to program the DP832. An incorrect command causes a message to display on the DP832 screen. For example, when defining an output voltage ramp the command ":TIME:TEMP:POINT 2" will give a screen error message because the minimum is 10 and not 2.I'd like to trap this message and display it using VBA. This type of message seems to be at a higher level than NI-Visa messages.
Test repeatability formula - Page 1
Forum section: electronics / testgear

author: DavidDLC
author_rank: Frequent Contributor
timestamp: September 09, 2015, 03:13:53 pm
content: I need to do a tester repeatability.Wikipedia says:Repeatability or test–retest reliability is the variation in measurements taken by a single person or instrument on the same item, under the same conditions, and in a short period of timeBut there is no formula nor targets.Does anybody have the formula and targets for it ?David.

author: Neilm
author_rank: Super Contributor
timestamp: September 09, 2015, 06:27:32 pm
content: This depends on what you are testing. For example, a multi-meter measuring a resistor should be very repeatable - within a digit. However, I did read an international standard on testing transformer oil that says if you get within about 7% for reputability it is doing good.

author: tggzzz
author_rank: Super Contributor
timestamp: September 09, 2015, 09:37:28 pm
content: Quote from: DavidDLC on September 09, 2015, 03:13:53 pmDepends on what the specific situation requires.I know of one piece of test equipment that was accurate to 0.1dB (of attenuation) but had a stability and repeatability of 0.001dB. Since the requirement was to measurechangesin attenuation, the absolute accuracy was relatively unimportant.
Tektronix RSA 306 spectrum analyzer - Page 1
Forum section: electronics / testgear

author: SoundTech-LG
author_rank: Frequent Contributor
timestamp: September 08, 2015, 08:07:03 pm
content: My buddy in the EMC Lab was showing me this, I guess he has already convinced our boss, and it's going to be ordered. Looks feature, and performance packed.http://www.mouser.com/search/refine.aspx?Ntk=P_MarCom&Ntt=186847028

author: hendorog
author_rank: Super Contributor
timestamp: September 08, 2015, 08:42:07 pm
content: Good video here on the latest updates to the RSA if you are interested.http://thesignalpath.com/blogs/2015/06/23/review-experiments-of-the-signal-hound-bb60c-spectrum-analyzer-tg124a-tracking-generator/

author: SoundTech-LG
author_rank: Frequent Contributor
timestamp: September 09, 2015, 01:21:28 pm
content: Yes, nice QAM constellation display comparison. Maybe in a few years these will be super cheap. I'd hate to buy one now, and have it outdated, and more affordable soon.
Agilent E4406A - Screen Saver? - Page 1
Forum section: electronics / testgear

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: September 09, 2015, 12:48:15 pm
content: I finally bought an Agilent E4406A VSA (thanks Kev!), and while trying to discover its strengths and weaknesses I noticed that this thing doesn't seem to have a screen saver function. It looks the screen backlight will remain switched on as long as the VSA is powered up, which isn't great for keeping wear of the CCFL backlights at a minimum (and replacing them isn't easy). I guess this also explains why so many E4406As on ebay have a dim screen.There's nothing in the menu (at least as I can see) that allows to setup a timeout at least for the backlight. There isn't even a way to reduce the brightness. I also searched in the manuals and found nothing regarding a function to switch off the built-in monitor.I also checked for any remote commands to switch off the screen in the manuals but couldn't find any.So it seems there isn't anything but I thought it's still worth a try to ask here to see if anyone found a solution for switching off the backlight, short of putting a switch in the power leads to the inverters.
NewScope-5 color LCD for HP 3577 - anyone done it? - Page 1
Forum section: electronics / testgear

author: bson
author_rank: Unknown
timestamp: September 08, 2015, 07:54:55 pm
content: Has anyone replaced the CRT in an HP 3577 with one of these?http://www.simmconnlabs.com/2001/2073.htmlI'm wondering how hard it is mechanically to yank the CRT and install the LCD... Is it reasonably done as a nice-to-have upgrade rather than for repair?This thing is kind of a beast and not easily opened up where I keep it, so it's far easier to ask for input than move the dang thing!Edit: I should have asked in the repair forum... DOH. Mod: feel free to move it if you feel it doesn't belong here

author: Howardlong
author_rank: Super Contributor
timestamp: September 08, 2015, 08:24:01 pm
content: I did the Newscope for the 8753A. Superb, it takes years if not decades off the age. I had a slight operator error when fitting it though, read herehttps://www.eevblog.com/forum/testgear/newscope's-lcd-kit-for-8753a-vna/

author: bson
author_rank: Unknown
timestamp: September 09, 2015, 07:20:18 am
content: Nice!Think I'll order a kit, looks like a fine way to spend a Sunday afternoon. Looks like an entirely different instrument, and the weight loss would be welcome...
Big Capacitors on Power Supply Output for Transients - Page 1
Forum section: electronics / testgear

author: JayDee
author_rank: Contributor
timestamp: September 08, 2015, 10:40:17 am
content: HI Guys,Setting up a test rig for some automotive work, I need a variable output voltage and decent current (see previous post on Bench PSU)Its hard to replicate a 12V battery on the bench when you need to test over a voltage range (6-16v). One method I have seen is two huge capacitors on the output of the Bench power supply.They supply the instant kick to cover transient demands.This seemed to work very well and was simple.. Any ideas what sort of size/spec capacitors I'd be looking at using here ?cheers, J.

author: Mad ID
author_rank: Regular Contributor
timestamp: September 08, 2015, 11:39:07 am
content: This is what we have built in the lab:https://www.dropbox.com/photos/shared_space/QMRamDdPLdtaIROWe mostly use it to test if we picked the right I2t rating for input fuses on our modules. I connect it in parallel with the rigol and it works fine.
Keithley 7510 autocal - they've got to be kidding??? - Page 1
Forum section: electronics / testgear

author: splin
author_rank: Frequent Contributor
timestamp: August 14, 2015, 04:05:16 pm
content: The manual includes this caution:'Do not cycle power during the auto calibration routine. Doing so could affect the accuracy of theinstrument.'Autocal takes 6 minutes - are they really saying that if the power ever trips out during an autocal your meter might need to be re-calibrated? !!!! How would you even know if its accuracy had been affected - would a self-test tell you? I find that hard to believe - surely Keithley's engineering isn't that incompetent? But if it really means that you simply need to re-run the auto calibration following the power loss, why doesn't the manual say so?Its easy to see that Flash or EEPROM could get corrupted if calibration data was being written when the power was lost but surely they would implement some means to avoid this by duplicating the calibration memory or detecting the mains power loss and providing enough power storage to allow a memory write in progress to complete?In reality the danger window when the calibration data is being written is probably quite small so you'd hope that realistically the chance of bricking your instrument should be quite small but even so would you ever risk running an Autocal again? The manual really needs to explain this in detail.Is this a triumph of marketing over engineering to save a few cents?

author: VintageNut
author_rank: Frequent Contributor
timestamp: September 07, 2015, 03:40:56 pm
content: Factory recommendation is that you use an uninterruptible power supply if you are going to perform a calibration. It is not an unreasonable requirement.
Upgrade from DG1022 - Page 1
Forum section: electronics / testgear

author: Groucho2005
author_rank: Regular Contributor
timestamp: September 06, 2015, 09:40:27 pm
content: I have been using a Rigol DG1022 (without the "A") generator for about 2 years. However, the pulse and square wave performance is rather poor. I'm looking for a replacement with a rise/fall time < 10ns, alotless jitter and higher frequency range. After searching here and elsewhere, the obvious choice seems to be the Siglent SDG5082 which also fits my budget.Any other options I may have overlooked?

author: rf-loop
author_rank: Super Contributor
timestamp: September 07, 2015, 05:47:01 am
content: Quote from: Groucho2005 on September 06, 2015, 09:40:27 pmAlso Siglent SDG2082X

author: Groucho2005
author_rank: Regular Contributor
timestamp: September 07, 2015, 08:07:44 am
content: Quote from: rf-loop on September 07, 2015, 05:47:01 amYes, that one looks very interesting but sadly no review yet.

author: jimon
author_rank: Regular Contributor
timestamp: September 07, 2015, 01:28:56 pm
content: DG4062 with the hack is also not a bad option
ds1054z status - Page 1
Forum section: electronics / testgear

author: femtohertz15
author_rank: Contributor
timestamp: August 30, 2015, 08:54:34 pm
content: Are the ds1054z 5us and AC trigger h/w bugs shipping fixed or still there?

author: Howardlong
author_rank: Super Contributor
timestamp: August 30, 2015, 08:58:17 pm
content: Quote from: femtohertz15 on August 30, 2015, 08:54:34 pmFixed sufficiently that there is no determinable problem in practical use. Just but it.

author: femtohertz15
author_rank: Contributor
timestamp: August 31, 2015, 01:44:46 am
content: I did just but it. Yet, worried. Ilookfor jitter in my circuits, not my scope

author: tggzzz
author_rank: Super Contributor
timestamp: August 31, 2015, 08:23:20 am
content: Quote from: femtohertz15 on August 31, 2015, 01:44:46 am+1

author: alsetalokin4017
author_rank: Super Contributor
timestamp: August 31, 2015, 09:14:11 am
content: I have got an email from a Rigol tech who tells me that there will be a new firmware update scheduled for release in October that should fix some of the misc. issues that still remain.These are the main ones I hope to see fixed (besides the freeze-up problem of course):

author: femtohertz15
author_rank: Contributor
timestamp: September 06, 2015, 01:48:12 am
content: I got the scope anyway, and so far, so good. The bugs I'd been worried about don't seem to be present. Very nice and responsive. I don't have an avalanche pulse generator but one of my projects has a nice sharp edge and I got a rise time of at most 5ns from it (I'd heard 4.2 or 4.4ns may be typical). It looks like they knocked themselves out implementing variable persistance/phosphor emulation. Its never quite the same as a real CRO, but they tried.

author: Daniel_Reyes
author_rank: Regular Contributor
timestamp: September 06, 2015, 02:06:33 am
content: How come I can't find this scope on amazon? I keep hearing good things about it and wanted to know the cost in usd.Sent from my SM-G900P using Tapatalk

author: TheSteve
author_rank: Unknown
timestamp: September 06, 2015, 02:39:17 am
content: Quote from: Daniel_Reyes on September 06, 2015, 02:06:33 amCheck tequipment.net for it. And if you do happen to buy it from them don't forget they give a discount for eevblog members!

author: Daniel_Reyes
author_rank: Regular Contributor
timestamp: September 06, 2015, 03:02:24 am
content: Quote from: TheSteve on September 06, 2015, 02:39:17 amThat's great! How do I get the discount? Do you know how much it ends up costing?Sent from my SM-G900P using Tapatalk

author: TheSteve
author_rank: Unknown
timestamp: September 06, 2015, 03:19:16 am
content: Quote from: Daniel_Reyes on September 06, 2015, 03:02:24 amSent you a PM with the discount code. You can also get them to apply the code for you if you use the chat system on the website.
monolithic 1x Probes Vs Coax? - Page 1
Forum section: electronics / testgear

author: rwgast_lowlevellogicdesin
author_rank: Frequent Contributor
timestamp: September 05, 2015, 11:04:00 pm
content: So I know you can use some 50ohm resistors and caps with coax to make a 1x probe, I also know this technique will load your circuit and draw alot of current.Some american companies offer 1x probes at 25mhz bandwidth, I.E Probemaster and Avex. I bought the Avex 100mhz monolithic probes, now im lookin for a good way to do 1x, what is it these 1x probes do over coax? Do they still load your circuit, like coax?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 05, 2015, 11:56:43 pm
content: What frequency response and impedance do you want/need?1x probes work by having a lossy transmission line, of relatively high impedance (90 ohms maybe?). The total series resistance for the (2m?) cable is somewhat higher.The impact on circuit is equivalent to an RC circuit having losses varying with frequency. The DC resistance is 1M, the capacitance is on the order of 200pF (check a datasheet to be sure), with an ESR of perhaps 100 ohms but depending on frequency (transmission line effects). Likewise, the frequency response (what gets to the scope) is strongly attenuated above 10MHz or so (check datasheet).Tim
Siglent SDS1072 hack able to 100MHz? - Page 1
Forum section: electronics / testgear

author: TheDefpom
author_rank: Frequent Contributor
timestamp: September 04, 2015, 08:26:49 am
content: Hi everyone,I might be picking up one of these units, but ideally want 100mhz not 70mhz, does anyone know if this model can be hacked to upgrade to 100mhz like some rigols can be?

author: tautech
author_rank: Super Contributor
timestamp: September 04, 2015, 09:21:06 am
content: Welcome to the forum.I'm quite sure they can be hacked although I've yet to hear of anybody that taken the time to do so.Interestingly Siglent has been installing a BW upgrade option in recent FW so it would seem they will offer upgrades in the future.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: September 04, 2015, 08:47:58 pm
content: Thanks for that.Hey as your signature says nz distributor, what's the best price you can get me for the sds1102cml?

author: tautech
author_rank: Super Contributor
timestamp: September 05, 2015, 08:07:19 am
content: Contact me directly via my website link next to profile.
Owon SDS7102V vs SDS6062V - Page 1
Forum section: electronics / testgear

author: arizzi
author_rank: Newbie
timestamp: September 04, 2015, 03:48:03 pm
content: Hello,I'm going to choice a DSO and after reading many comments on the blog I'm oriented towards OWON scopes. As I not really need large bandwidth, It would be enough the SDS6062V, as I found it at a 100 Euro less that the SDS7102V.BTW I have a couple of questions for skilled people about ow-cost Owon scopes:- Do the 6062 and 7102 differ for bandwidth/sampling rate ONLY? Is it the analog bandwidth making useless a higher SR or is lower SR limiting the general bandwith?- Does the V version of these scopes differ only for the VGA/LAN ports, or non-V version actually have older hardware (these is because I've understood there is newer HW that improved the performances- Is there an updated review? I got a little confused in reading the reviews, as they looks outdated wrt the new sw/hw version of the scopes. Are some of the issues mentioned in the old review actually solved in the new hw/sw version?Any further comment on these DSO is welcome.Thanks to everyone can help meAndrea

author: Hydrawerk
author_rank: Super Contributor
timestamp: September 04, 2015, 03:53:34 pm
content: Owon is rather crap.Buy a Rigol DS1000Z or a Siglent.
Ballantine 6130 Time Mark Generator - Page 1
Forum section: electronics / testgear

author: barry14
author_rank: Regular Contributor
timestamp: September 01, 2015, 08:52:23 pm
content: I just got a Ballantine 6130 Time Mark Generator on Ebay for $40. It's in great condition and works fine. However I would like to get a copy of the manual. Google searches have yielded the schematic and a parts list. Does anyone know where to get the manual?
EMC conducted noise with the DSA815  - Page 1
Forum section: electronics / testgear

author: Bob S
author_rank: Contributor
timestamp: September 02, 2015, 12:30:16 am
content: I recently purchased the DSA815 to do pre-compliance conducted noise testing. I have both "Quasi-peak" and "Avg" reading from our compliant test lab that I am tying to make some comparisons against with the DSA815. The DSA815 does not list a "Avg" detector but does have a "Video Avg" and "Power Avg" detector. Does anyone know how to setup the DSA815 to best mirror the tests labs "Ave" data? Thanks.
How does signal analyzer go from Vrms to Vrms^2? - Page 1
Forum section: electronics / testgear

author: alltherc
author_rank: Newbie
timestamp: August 31, 2015, 08:20:13 pm
content: I remember reading a long time ago that when you have a PSD (such as would be given on a SA) that the units of Vrms^2 imply a load of 1 Ohm.Suppose I want to measure the noise PSD at 1kHz in a 1Hz bandwidth using an ideal BPF and an oscilloscope.That is, suppose I have this setup:My scope will measure:Vx = Vin*RL2/(Rs + RL2) To convert this to how a SA display it, is it sufficient to simply square Vx? Then I have Vx^2OR do I need to scale it as well to account for my load impedance?The reason I am asking is because I have an oscilloscope with an FFT function.For every point along the FFT it gives a value in Vrms per unit BW.I want to compare my results from my scope to results obtained from a signal analyzer. But the signal analyzer gives results in Vrms^2 per unit bw. (Suppose I'm only interested in 1Hz bw right now). Basically I'd like to use my scope in place of my signal analyzer. But the units are different...

author: w2aew
author_rank: Super Contributor
timestamp: August 31, 2015, 09:59:15 pm
content: PSD = Power Spectral Density.Since it is indicating Power - there most definitely has to be an assumed impedance. Most of the time, 50 ohms is assumed for nearly all RF applications. 75 ohms for video/CATV applications. 600 ohms is common for audio. If you are comparing to a standard RF Signal Analyzer or Spectrum Analyzer, then it is most likely using 50 ohms as the load/reference impedance.The "Spectral Density" part means that the result is normalized to a 1Hz measurement BW. Many Signal Analyzers do not offer a real 1Hz resolution BW filter, thus will perform a calculation to get there. More modern signal analyzers will perform this measurement using a discrete Fourier Transform (like FFT or Chirp Z) in order to arrive at the 1Hz effective resolution BW.Your scope FFT gives you Vrms^2 so that you can divide by your impedance to arrive at Power. If you want the Signal Analyzer and the FFT reading to match, then you'll have to make sure that you use the same load impedance in both cases (because the source impedance of the thing you're measuring will determine the power delivered to a given load).

author: alltherc
author_rank: Newbie
timestamp: August 31, 2015, 11:29:39 pm
content: Does the scope give a voltage density as well? Is there any care that needs to be taken to take that into consideration?
Function Generator Sync Problem - Page 1
Forum section: electronics / testgear

author: kolabuzlu
author_rank: Newbie
timestamp: August 28, 2015, 06:41:55 am
content: Hi everyone,My function generator has four outputs. Two of them are main outputs Channel A and B, other two are TTL outputs Channel A and B.I do want TTL Ch A to sync with main Ch A signal, but it does not. The two act like independent from each other.Where am I missing? What can cause the problem?Please help.Best regards to all.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: August 28, 2015, 02:31:35 pm
content: What is the make and model number of your FG?

author: kolabuzlu
author_rank: Newbie
timestamp: August 29, 2015, 12:16:45 am
content: It's a cheap, Chinese-made FG.

author: w2aew
author_rank: Super Contributor
timestamp: August 29, 2015, 12:53:41 am
content: Quote from: kolabuzlu on August 29, 2015, 12:16:45 amIs it possible that they swapped the digital outputs, and the "other" one is synchronous with CH1?

author: kolabuzlu
author_rank: Newbie
timestamp: August 29, 2015, 07:51:59 pm
content: They may did. I'll check and post here.Sent from my iPhone using Tapatalk
Flir One - Page 1
Forum section: electronics / testgear

author: bluey
author_rank: Regular Contributor
timestamp: August 27, 2015, 09:34:03 pm
content: Anybody know any details about the FLIR ONE?http://www.flir.com.hk/flirone/First gen iPhone 5 model looks like a fat phone case.Second gen model is a small brick that plugs in to lightning connector.http://www.flir.com.hk/flirone/content/?id=69560Photos show Android model too but looks like it is not released yet.Struggling to find information on the thermal imager. Looks to be marketed more as a toy for geeks. No specifications. No accuracy on temperature.(I have a Fluke VT02 that I got cheap. For US250 it gives me more capability than I had before. I was as much interested in having an IR thermometer that had adjustable emissivity.)

author: bluey
author_rank: Regular Contributor
timestamp: August 27, 2015, 09:37:00 pm
content: I found the flir one thread the old fashioned way. Didn't come up using search. Sorry.https://www.eevblog.com/forum/testgear/new-flir-products/
Maynuo M8811 restart problem? - Page 1
Forum section: electronics / testgear

author: JMcC
author_rank: Contributor
timestamp: August 27, 2015, 05:11:52 pm
content: I have a Maynuo M8811 that has an annoying problem when communicating with a PC. After a while of normal running (reading current & DVM, the PSU resets for no particular reason. This happens with both the official software & a labview program that I wrote for it.When not communicating with the computer it works fine. Baud rate is 38400, though it also happens at 9600. There is no set time for the reset to happen. Sometimes it runs for >30 minutes, sometimes less. The load currents are quite small (< 10mA).Anyone seen this before? I'd like to be able to record long term using this unit.Thanks,JMcC

author: mcinque
author_rank: Unknown
timestamp: August 27, 2015, 09:20:57 pm
content: since you say it happens only when connected to the USB, it would be useful to see if there is any correlation between the reset and some particular USB data. Can you hook up a logic analyzer and trigger the USB dump around the moment the PSU resets (i.e. when the voltage is cut out by the reset)?
I didn't know that Fluke CNX meters were not compatible with Fluke Connect - Page 1
Forum section: electronics / testgear

author: accesscontrolforum
author_rank: Contributor
timestamp: May 14, 2015, 01:05:01 pm
content: It makes since that only Fluke equipment branded FC are Fluke Connect compatible but the CNX line is not. However I never paid any attention and just bought a used Fluke CNX3000 thinking I could use the Fluke Connect app. WRONG. They use different protocols to transfer data (CNX ZigBee or FC Bluetooth). I just wanted to point out I made a mistake by not paying attention. And prevent you from doing the same.Also it looks as though the CNX line is discontinued. However looking at these two meters the specs are the same except the battery life is shorter in the FC.CNX3000http://en-us.fluke.com/products/digital-multimeters/fluke-cnx-3000-wireless-tester.html3000FChttp://en-us.fluke.com/products/digital-multimeters/fluke-3000-fc-wireless-multimeter.htmlhttp://www.fluke.com/fluke/uken/products/fluke-connect-faqThanks for the video Dave!http://www.eevblog.com/2013/01/30/eevblog-417-fluke-cnx3000-wireless-multimeter-teardown-2/

author: pbendel
author_rank: Contributor
timestamp: August 28, 2015, 02:28:26 am
content: Would anybody know if its possible to upgrade CNX meters to FC meters as the CNX ones are becoming cheap and easily available... Thanks!

author: CosPhi
author_rank: Regular Contributor
timestamp: August 28, 2015, 06:02:27 am
content: CNX is going to die. Already on year ago there was an exchange program. I think for the half or a third the price you could get an FC if you gave the CNX back.
Ridiculous Test Equipment Listings - Add Yours Here - Page 1
Forum section: electronics / testgear

author: GeekPriest
author_rank: Contributor
timestamp: August 25, 2015, 08:33:18 pm
content: How about a Fluke 27/FM (non-True RMS version) for $450?https://www.youtube.com/watch?t=413&v=OEoazQ1zuUM

author: Stray Electron
author_rank: Super Contributor
timestamp: August 25, 2015, 09:53:05 pm
content: "Ridiculous Test Equipment Listings"FWIW: You could include most of the E-bay listings in this category.For example, I just bought an environmental chamber controller from E-bay. I was theonlybidder and got it for less than $10. Several others are listing the same controller on E-bay with Buy It Now prices of $1400!

author: Shock
author_rank: Super Contributor
timestamp: August 25, 2015, 10:10:35 pm
content: Better idea, post bargains, not whinges about high prices, and do it in the correct forum, Buy/Sell/Wanted.

author: GeekPriest
author_rank: Contributor
timestamp: August 26, 2015, 02:38:02 am
content: It's not about whining. It's about mockery.
HP 6632B Power Supply replacement OLED screen prototype - Page 1
Forum section: electronics / testgear

author: eb4eqa
author_rank: Regular Contributor
timestamp: August 31, 2015, 10:45:13 am
content: Hi,Sorry, I shoud have posted it here in the first place, now it seems I can't move or delete it from the Buy-Sell forum. Some of you might be interested.I have two power supplies with dim and ugly displays. I've been working on this for some time and it is almost finished. The new module is a bit smaller but very crisp and very easy to read.I am not going to give away the code, I don't want to see how someone else is selling my work AGAIN. But I might sell programmed PICs or complete retrofit kits if there is interest.Would you be interested in one of these for the right Price?Regards,Roberto EB4EQA

author: Aodhan145
author_rank: Frequent Contributor
timestamp: August 31, 2015, 11:17:18 am
content: Why shouldn't it be in the buy sell forum. You are selling them

author: Simon
author_rank: Unknown
timestamp: August 31, 2015, 12:22:17 pm
content: it is, if he puts another one up he gets banned !
Solution: New LCD for 8904A - Page 1
Forum section: electronics / testgear

author: eb4eqa
author_rank: Regular Contributor
timestamp: August 25, 2015, 10:36:52 am
content: Hi all,I did it some time ago but I was unable to write a small article until now. If you have a 8904A you will probably be interested in this:New LCD for HP 8904Ahttp://www.rbarrios.com/projects/8904ALCD/Regards,Roberto EB4EQA

author: DimitriP
author_rank: Super Contributor
timestamp: August 25, 2015, 11:02:07 am
content: Very Niiiice. It makes it look like a different instrument altogether!

author: rvalente
author_rank: Frequent Contributor
timestamp: August 25, 2015, 12:05:08 pm
content: Charming! It's nice to have many options of BL to choose (white on blue, green on black, black on green, orange on black) etc...
Fluke 5215A repair - Page 1
Forum section: electronics / testgear

author: classicTEK
author_rank: Contributor
timestamp: August 25, 2015, 02:16:35 pm
content: Hello All,I have come across a Fluke 5215A precision amplifier. It is FIXED at 100x amplification by design.I have been trying to repair the preamplifier board and having trouble with this one. I am specifically trying to follow the TS procedures in the manual on page 4-24. When I get to step 10 I am to check the -31Vdc at TP17 and the +30.5Vdc at TP8. I am measuring -33.04 and +32.2 at TP17 & TP8 respectively. Since these measurements are out of tolerance, I am directed to go to step 12.Step 12 directs me to check 40Vrms input to the bridge rectifier(CR182) and this is where I am stuck. I am measuring 48.6Vrms across pins 5 & 7 of P20. The input comes DIRECTLY from the AUX T3 to CR182.What am I doing wrong or what could be causing me to measure high at the input to CR182? The input to CR175, which is the rectifier for the 21Vrms, reads 21'ish Vrms.Also, what is the best way to communicate the schematics? The manual is the same all over the net so I thought folks would just download that and correlate the info I am referring to.Which is best?Cheers

author: Zucca
author_rank: Unknown
timestamp: August 25, 2015, 03:03:12 pm
content: I would have posted this in the repair section...https://www.eevblog.com/forum/repair/

author: classicTEK
author_rank: Contributor
timestamp: August 25, 2015, 03:51:01 pm
content: Darn.........and I thought I checked. I read "TE, teardown......stopped and posted.Can this be moved or do I need to repost or move?Cheers,David

author: retiredcaps
author_rank: Super Contributor
timestamp: August 25, 2015, 04:52:30 pm
content: Quote from: classicTEK on August 25, 2015, 03:51:01 pmAsk moderators to delete this entire thread and posts with it.
Powerware 9120 Service Manual - Page 1
Forum section: electronics / testgear

author: morphis
author_rank: Newbie
timestamp: August 24, 2015, 12:49:06 pm
content: HiI'm looking for service manuals for the Powerware (now Eaton) 9120 700VA & 1000VA.Hope someone has them.Fingers crossed.

author: Wuerstchenhund
author_rank: Super Contributor
timestamp: August 24, 2015, 06:18:38 pm
content: Quote from: morphis on August 24, 2015, 12:49:06 pmAnd that is test instrument related because?
Replace MLR-21 Heating Element with older  MLR-20 Heating Element? - Page 1
Forum section: electronics / testgear

author: JuergenB52
author_rank: Contributor
timestamp: August 23, 2015, 12:26:33 pm
content: Hi,has anyone replaced a broken Weller MLR-21 Heating Element with the previos MLR-20 Heating Element?It looks like they use the same Heating Element, just with the lack of ESD protection?The MLR-21 Element has a small Resistor on the PCB.I can get one MLR-20 Heating Element for 50€ in Germany and would like to repair the MLR-21.ThanksJürgen

author: dom0
author_rank: Super Contributor
timestamp: August 23, 2015, 12:48:51 pm
content: Just curious: Why do these heating elements seemingly break rather often?

author: Kjelt
author_rank: Super Contributor
timestamp: August 23, 2015, 01:01:12 pm
content: What do you mean often.Problem with these tiny smd heating elements is their more fragile than normal size elements and they can not handle shock (using wet sponge instead of copper curls for cleaning)Also these stations had no auto shutdown, they were on all the time. The tips had lots of mass compared to modern ones.The newer Weller WX SMD irons have auto sleep and use copper for cleaning.The ultra tiny smd irons replace the heating element and sensor together with the tip.
re: Fluke 289 backup cap - Page 1
Forum section: electronics / testgear

author: mzacharias
author_rank: Frequent Contributor
timestamp: August 22, 2015, 11:30:33 am
content: I have a 289 bought new summer of 2012. I have never opened it, but I wonder at what point should I be concerned about the notorious backup capacitor?Thoughts?

author: retiredcaps
author_rank: Super Contributor
timestamp: August 22, 2015, 10:04:53 pm
content: I'm sure you are aware of Fluke's terms and conditions wrt to their warranty. If not, I have attached them straight from the 289 manual for you.You might want to check the cap every 6 months?If you qualify for warranty, you might want to wait until 2017 or 2018 to send the 289 to Fluke HQ for the supercap problem. Why? In the next 2 to 3 years, Fluke might make more changes to the pcb, components, bug fixes, etc. If they choose just to replace your pcb, like they have for some with the supercap problem, you will get the latest pcb revision with a calibration check.If Fluke chooses to replace your supercap with a new one in 2017/2018, they will likely check your calibration before returning the 289 to you. This means, in a indirect way, you get to know if your 2012 Fluke 289 has drifted or not.If you don't qualify for warranty, you can always replace the cap on your own.PS. Are you going to continue making youtube videos?
TES-2900, new meter? - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: August 21, 2015, 07:20:02 am
content: Hello!Guys, there's a new object.The search has not been considered?What is this phenomenon?Paper is 0.05 + 1If this is true - would extravaganza.http://www.tes.com.tw/en/product_detail.asp?seq=437

author: Psi
author_rank: Super Contributor
timestamp: August 21, 2015, 07:39:48 am
content: I translated it back to UkrainianPryvit!Khloptsi, ye novyy ob'yekt .Poshuk ne roz·hlyadayet?sya ?Shcho tse yavyshche?Papir 0,05 + 1Yakshcho tse pravda - bude feyeriyi.Does it make sense? because it definitely doesn't in English

author: Unknown
author_rank: Unknown
timestamp: August 21, 2015, 08:15:13 am
content: I have not written - xenophobia!I wrote that there is a new, not well known in this forum, the product.Thousands of people are enjoying this blog through an interpreter. What does it mean? Leave it?Specification - a paper and figures.Maybe someone is interested in reviewing and clarifying the appropriate paper to reality.

author: Mr.B
author_rank: Unknown
timestamp: August 21, 2015, 08:24:03 am
content: Quote from: Psi on August 21, 2015, 07:39:48 amMakes perfect sense to me Psi...(Wanders off to kitchen wondering why the bourbon bottle miraculously went from full to empty in two hours...)

author: retiredcaps
author_rank: Super Contributor
timestamp: August 21, 2015, 02:43:28 pm
content: I suspect OP meant (and changed subject header for OP)OP is excited about new meter (TES-2900) and hasn't found any information or teardown pictures. OP is wondering if this multimeter is too good to be true due to its spec of 0.05% + 1 digit on DCV.Off to do some research on this ...

author: eas
author_rank: Frequent Contributor
timestamp: August 21, 2015, 05:57:05 pm
content: Quote from: retiredcaps on August 21, 2015, 02:43:28 pmExcellent work at looking at *all* the clues!Quote from: measurementpoint on August 21, 2015, 08:15:13 amXenophobia is a plausible explanation, but there is another, more plausible, explanation, one that crosses cultures and language: a fear of spammers.Between the language barrier, and the content and tone of your post, it "smelled like" spam.If you'd named the equipment in the title, or at the beginning of your post, it might have made more sense to people. Instead, that information was hidden on the other side of link at the end of the message. By the time people read that far, people may have thought the link was spam, and would have been disinclined to click on it; I did.

author: Unknown
author_rank: Unknown
timestamp: August 21, 2015, 06:32:55 pm
content: retiredcaps, thank!It was with these words I wanted to say.The characteristics are very good. Does it really is.
Fluke 289 backup capacitors - Page 1
Forum section: electronics / testgear

author: mzacharias
author_rank: Frequent Contributor
timestamp: August 25, 2015, 05:32:21 pm
content: I have a 289 purchased new in the summer of 2012.I'm wondering at what point I should start to worry about the backup cap and perhaps when to replace it as a preventive measure. I have avoided opening the meter for any reason so far, just on general principles.Suggestions?

author: retiredcaps
author_rank: Super Contributor
timestamp: August 25, 2015, 05:48:25 pm
content: Double post?I made suggestions herehttps://www.eevblog.com/forum/testgear/re-fluke-289-backup-cap/
JBC compact soldering station: analog (BT) vs digital (CD) - Page 1
Forum section: electronics / testgear

author: Sigmoid
author_rank: Frequent Contributor
timestamp: August 21, 2015, 01:32:47 pm
content: Hey,Recently moved back to the EU from the US, and so I've sold my 110V analog Weller which served me okay-ish... Due to the way Wellers are ridiculously overpriced for their capabilities, I have looked into other brands, and there seems to be an agreement that JBC is the best in terms of thermal stability...I did find an acceptable supply of JBCs at Weidinger... and now I'm trying to figure out whether I should buy the analog (BT-2WA) or digital (CD-2BD) station. I could afford the digital one, I just don't know whether I want to afford it, since the price difference is about 150 Euros. I could spend that on a lot of cool stuff.Has anyone used the BT station?How does it compare to the digital one? I'm not sure I can make meaningful use of the USB connectivity and similar stuff, the main question is whether there's a difference in thermal performance, tip compatibility, and useful bells and whistles like auto-sleep and the automatic tip change mode, or in terms of build quality... I see the brass wool holder on the BT is made of plastic.

author: robert_
author_rank: Regular Contributor
timestamp: August 21, 2015, 02:05:40 pm
content: I cant see any difference in soldering performance between the CD (at work) and an old AD2700 (at home). Temperature setting on the digital one is much more annoying ("Hold Tool to change Temperature" and slow, so i actually prefer the analog.

author: KJDS
author_rank: Super Contributor
timestamp: August 21, 2015, 02:07:20 pm
content: That looks like a Weidinger special of an AD2700. I prefer those to the digital stations. The handpieces, and I think the power levels are the same, so it all depends on whether you like to push buttons or turn knobs.
Flir Tools activate options - Page 1
Forum section: electronics / testgear

author: reallybigone916
author_rank: Contributor
timestamp: August 11, 2015, 04:32:25 am
content: Is there a way to turn on the thermal blending, picture -in picture and etc options?

author: mcinque
author_rank: Unknown
timestamp: August 11, 2015, 07:36:06 am
content: I guess it's something related to the camera model, like:if camera=E8 then activate advanced optionsIn this case the only way to have that options is to hack the camera.Maybe someone more experienced can confirm my guess.

author: reallybigone916
author_rank: Contributor
timestamp: August 11, 2015, 08:28:38 am
content: It's a E30 upgraded to E60.The options will appear on Flir Tools only if I take the image using PIP, fusion, or Isotherm mode.

author: tomas123
author_rank: Frequent Contributor
timestamp: August 11, 2015, 03:08:37 pm
content: Quote from: reallybigone916 on August 11, 2015, 08:28:38 amyou are right,flir tools can't associate the thermal IR_188m.jpg with real DC_188n.jpgthe reason is the missing PiP overlay offsetCode:exiftool -pip* FLIR0013.jpgPiP X1 : 60PiP X2 : 259PiP Y1 : 45PiP Y2 : 194

author: reallybigone916
author_rank: Contributor
timestamp: August 20, 2015, 01:34:20 pm
content: Wonder if it's possible to config the cam to record as IR_XXXX vs. GR_XXXX (two separate files) while shooting thermal camera mode.

author: tomas123
author_rank: Frequent Contributor
timestamp: August 21, 2015, 09:59:54 am
content: it's not a bug it's a feature of the older Flir camerasExx:- two different images- the FOV of real image is significant greater as the thermal image