hybridfree/eevblog-posts huggingface dataset:
Agilent E4405B Display Problem - Page 1
Forum section: electronics / testgear

author: User2938
author_rank: Newbie
timestamp: November 20, 2018, 05:36:27 pm
content: Hello, I recently acquired an Agilent E4405B spectrum analyzer which has a strange quirk ... there are pink/red vertical lines equally spaced across the screen. They are always there, unless a button is pressed, which causes something to be processed (change in settings, change in screen, etc.) at which point they turn back to white (or whatever their normal color is supposed to be) for an instant. However, about 1 second later they return to pink. Seems like whenever a button signal goes high or low, the display looks as it should for a second or so. I'm attaching a pic, where the lines are visible in the grid... they are across the entire screen but due to the camera lighting you just can't see them in the button labels. Anyone know what would cause this and how to fix it?
Gas detector for ozone ? - Page 1
Forum section: electronics / testgear

author: Pluscrafter
author_rank: Regular Contributor
timestamp: November 19, 2018, 09:12:58 pm
content: Is there a gas sensor for ozone to measure the ozone values in the air? It's sufficant enough, when it detects a rise of ozone after using a tesla coil and it should work with the arduino.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 19, 2018, 09:19:59 pm
content: https://www.spec-sensors.com/product/ozone-sensor/

author: tv84
author_rank: Super Contributor
timestamp: November 19, 2018, 09:34:30 pm
content: https://www.mikroe.com/ozone-2-click
FLUKE 8012 ChaRger circuit and battery chaNge - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: November 19, 2018, 08:12:54 am
content: Hi!I see what NiCd battery inside FLUKE 8012 got chargeeverytimewhen it was plugged into outletIt charges via simple current limiterSee chematics here C:/Users/vic/fluke%208010a%208012a/Fluke-8010%208012A_Instruction_Manual.pdfThere are not NiCd around nowWhat is the best way to mod Fluke 8012 to NiMH batteries? Is it some AA?

author: bd139
author_rank: Super Contributor
timestamp: November 19, 2018, 09:55:06 am
content: I wouldn't bother myself. Stick NiCd in it or make it mains only. NiMh wont charge safely with that circuit.I actually just modded one of these a week or so ago to be mains only:https://www.eevblog.com/forum/testgear/fluke-8010a-mains-only-conversion-and-display-replacement/I changed the LM317 to be a voltage source rather than current source by breaking a track and adding a couple of resistors.If you haven't done it already, change all the electrolytic capacitors!

author: 001
author_rank: Super Contributor
timestamp: November 19, 2018, 10:09:09 am
content: Quote from: bd139 on November 19, 2018, 09:55:06 amAwesome workBut I need to battery modeQuote from: bd139 on November 19, 2018, 09:55:06 amNo any NiCd aroundSo how to replace itsmart? I.e. how to add NiMH charger to 8012 without any EMС or metrological problems?
Definitions of ampere, volt and ohm are subjected to change. - Page 1
Forum section: electronics / testgear

author: technix
author_rank: Super Contributor
timestamp: November 16, 2018, 06:26:28 am
content: The definition of volt will be changed by about 100ppb and ohm a few tens ppb, due to overhauls of definition of kg and ampere.Will this invalidate ALL calibrations on any equipment with 7.5 digits or more accuracy like the HP 34470A?What about 6.5 digit equipment like HP 34461A/34401A?What about the 4.5 digit jobs like Fluke 87V and Uni-T UT61E?

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 16, 2018, 06:27:42 am
content: See the existing thread here:https://www.eevblog.com/forum/metrology/time-to-get-all-our-instruments-recalibrated/msg1968140/#msg1968140

author: coromonadalix
author_rank: Super Contributor
timestamp: November 16, 2018, 11:50:07 am
content: would like to see the change(s) on a 12 digits voltmeter ... dont recall the model but it had a small thread here ?

author: bson
author_rank: Unknown
timestamp: November 17, 2018, 03:41:18 am
content: it should be pretty straightforward to issue a firmware update that can use existing cal data.
Texscan VSM2  Repair/Restoration - Page 1
Forum section: electronics / testgear

author: Martin.M
author_rank: Frequent Contributor
timestamp: November 18, 2018, 01:31:28 pm
content: hello friends,I need the application from this Jerrold Texscan VSM2 Field Strenght Meter.It is build as a early battery powered SA for cable TV.Special the instruction to adjust that apparatus, there is a lot of problems.greetingsMartin
Connecting 02 XS 3868 Bluetooth audio modules - Page 1
Forum section: electronics / testgear

author: kevinmarshall
author_rank: Newbie
timestamp: November 16, 2018, 05:32:50 pm
content: Please tell me how to connect 02 XS 3868 Bluetooth audio modules together for audio pairing one as the transmitter and other as the receiver ?If they can't connect together as transmitter and receiver what kind of Bluetooth modules I can use to transmit audio signals to XS 3868 ?
Appa 303 multimeter (OEM for Ideal, Greenlee, Iso-Tech, Benning,  Tektronix) - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: November 22, 2018, 02:53:43 pm
content: Anybody use it?

author: Hydrawerk
author_rank: Super Contributor
timestamp: November 22, 2018, 04:30:42 pm
content: This must be quite old. It is discontinued.I found a similar-looking Appa-305 in a year 2001 catalogue. Both 303 and 305 have a RS-232only.So it is early 2000s stuff!

author: 001
author_rank: Super Contributor
timestamp: November 23, 2018, 07:05:43 am
content: Quote from: Hydrawerk on November 22, 2018, 04:30:42 pmis it good or bad?

author: Hydrawerk
author_rank: Super Contributor
timestamp: November 23, 2018, 11:33:15 am
content: Appa should be good in general, but I have never used this 303 DMM.
remote controlable complex electronic load - Page 1
Forum section: electronics / testgear

author: unclebob
author_rank: Contributor
timestamp: November 15, 2018, 08:51:17 am
content: Hello,I am looking for an electronic load that does not only simulate an ohmic resistor but a complex impedance.Background: We are facing problems with 24V highside/lowside switches when they are exposed to capacitive or inductive loads.In the nicer cases short circuit detections are detecting a short circuit when you switch a capacitive load, in the nastier cases thereare oscillations.DC electronic loads are pretty common but do you know about a solution that can simulate inductive/capacitive loads in combination with aresistive load to simulate a relay for example? I would like to have a remote controlable unit so that I can automatically test and qualify theparts over a given R/L/C range.Does such a thing exist?

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: November 16, 2018, 01:28:06 am
content: Fast 4 quadrant amplifier + AWG?4QA for example Kepco, Spitzenberger & Spies, Dr.Hubert, Rohrer

author: GlowingGhoul
author_rank: Regular Contributor
timestamp: November 16, 2018, 04:49:29 am
content: You didn't mention your wattage requirements, but this Chroma has a constant capacitance mode, and is remotely controllable:https://www.chromausa.com/product/benchtop-dc-electronic-load-63000/https://www.chromausa.com/dc-loads-get-exclusive-features/
BK 1823A or 1856D universal counter or not? - Page 1
Forum section: electronics / testgear

author: FriedMule
author_rank: Frequent Contributor
timestamp: November 13, 2018, 10:38:15 pm
content: Hi I am looking for a cheap universal counter and found these two BK 1823A or 1856D models on Amazon, I want one because "it is good to have" I am not working with radio or that kind but will use it for about anything where a fairly precise counter is needed.They may be copies of the original BK, dont know.Would you buy one of them (wich one and why) or choose something else?

author: DonRon
author_rank: Regular Contributor
timestamp: November 15, 2018, 08:24:34 pm
content: Hi FriedMule,asking me the same question for a long time and found no decision until today. Maybe have a look at the TTi TF930 ..https://www.aimtti.com/product-category/frequency-counters/aim-tf900series.Meanwhile I am using a frequency counter kit from kn-electronic which is a old school design - nor reciprocal counter and only 8 digits.Also thinking about purchase of a used Phillips or old HP / Keysight / Racal Dana counter. But this is really old stuff and I would not be able to repair it in the case of failure. So until today I have found no decision which one to buy and so I am starting to build a 200 MHz reciprocal counter based on a publication in the german magazine FUNKAMATEUR.Would appreciate to hear about your decison / your experience.Regards,Ronald

author: cdev
author_rank: Super Contributor
timestamp: November 15, 2018, 08:42:01 pm
content: Considering its price, Ive had pretty good luck with an eight digit PIC based frequency counter that is ridiculously inexpensive.There has been a fair amount of discussion here of it if you search back.

author: BillB
author_rank: Unknown
timestamp: November 15, 2018, 10:02:55 pm
content: I've got a BK 1823A and can't complain. Well, on second thought it's a little cheap feeling - the handle, the plastics, etc. But it does function fine.

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 15, 2018, 10:18:45 pm
content: I'm pretty sure I've seen the same units with other brands stamped on them around. They seem to go for about $100 or so.
MSO4054 - Page 1
Forum section: electronics / testgear

author: ExodusEffects
author_rank: Contributor
timestamp: November 15, 2018, 11:27:41 am
content: I can't express how much I love this new scope; the specs are incredible and more over the price I was able to secure it for is unheard of.They only charged me $5000 CNDIt was a demo unit, but for Electro-Meters to provide me with such a significant discount I felt I should give them a shout out, FYI they still have a huge sale going on for demo equipment from Yokogawa, Itech and Rigol.http://www.electro-meters.com/demo-specials/Shipping is no problem they told me, I was torn as they are having a 30% off on a lot of new Itech stuff as well, after dropping 5 grand on this I’m afraid I’ll be missing out on the itech sale.Happy hunting guy's

author: maginnovision
author_rank: Super Contributor
timestamp: November 15, 2018, 06:36:17 pm
content: So now you have a lecroy 9424, rigol 1054z, and a rigol mso4054? Join TEA.

author: nctnico
author_rank: Super Contributor
timestamp: November 15, 2018, 07:23:38 pm
content: Return it. With a bit of waiting you can probably buy the MSO5000 and hack it.

author: tv84
author_rank: Super Contributor
timestamp: November 15, 2018, 07:45:24 pm
content: Quote from: nctnico on November 15, 2018, 07:23:38 pmThat's why they are doing the promotion...

author: maginnovision
author_rank: Super Contributor
timestamp: November 15, 2018, 07:50:36 pm
content: Yea, but also the 4054 is probably a better overall scope even hacking the 5k.

author: DaJMasta
author_rank: Super Contributor
timestamp: November 15, 2018, 08:55:02 pm
content: Quote from: maginnovision on November 15, 2018, 07:50:36 pmReally? And for that price?I've got a DS4024 and it's a good scope... but it is definitely an older one. I wouldn't spend that kind of money on a new one given the alternatives available, even though I recognize it would be difficult to find 500MHz bandwidth on this modern of a scope for $5000 CAD new. Especially if you already have multiple, I'd look towards a more modern option to 200MHz or so (maybe with a 10 or 12 bit converter) then pick up an older 500MHz+ bandwidth scope, though it wouldn't be surprising to see some big deals coming on the 4000 series or even the 6000 series rigol scopes given the new launches (though, maybe longer for the 6000 series since the 1GHz+ models for the 7000 series aren't out yet.)Don't mean to rain on the OP's parade, like I said I think it's a good scope, just seems like a tough sale at the pricepoint given the market - there have been a lot of improvements made and competitors in the price segment in the last 7 years.

author: maginnovision
author_rank: Super Contributor
timestamp: November 15, 2018, 09:31:40 pm
content: Quote from: DaJMasta on November 15, 2018, 08:55:02 pmFor 3700usd I don't think that's a bad scope and the 5k doesn't have 500MHz bandwidth or the active probe interface. I don't need 500MHz bandwidth though so personally I'd never have bought it. What else specifically would you have bought with a similar or better feature set? I don't typically look at the mid-range stuff much with no use for it.
Digitech QM1576 - Page 1
Forum section: electronics / testgear

author: coling55
author_rank: Newbie
timestamp: November 14, 2018, 10:32:05 pm
content: I have two Digitech multimeters, the QM1576 and QM1571They have both decided to stop communicating with my laptop by not recognising the COM PORT. I have loaded the software onto a different laptop, but the same result.Has anyone else had this issue and if so what was the resolution?

author: Hydrawerk
author_rank: Super Contributor
timestamp: November 14, 2018, 10:36:54 pm
content: They look like made by CEM.

author: threephase
author_rank: Regular Contributor
timestamp: November 14, 2018, 10:37:18 pm
content: If this is a CEM based model, check that the COM port setting is not above 12. The Extech unit I have, which is really a CEM meter will not communicate with a COM port set above 12.Kind regards
EZGPIB - no source highligting during stepping (F7/F8) - Page 1
Forum section: electronics / testgear

author: pelule
author_rank: Frequent Contributor
timestamp: February 02, 2016, 12:27:25 pm
content: I moved this item from another thread to keep items separated.I tried in EZGPIB, to step through the a script using the STEP (F7/F8) commands.EZGPIB steps (visible changes in the "Console Output"), but you can't see the position in your script (no jump to, no highlighing, different behavior as for breakpoints/F5).Especially in complex/long sripts your are steadily in danger t o loose the overview.Unfortunatel the developer of this great nice software, Ulrich Bangert, passed away in 2014 in the age of 59 (much, much to early).Is this a normal behaviour, or is there a problem in my system/software setup?Is anyone of the users of EZGPIB able to confirm or to report a different behaviour?BRPeLuLe

author: pelule
author_rank: Frequent Contributor
timestamp: February 03, 2016, 12:19:33 am
content: Update:Got in contact with a close friend of Ulrich Bangert, who will try to keep Ulrichs projects alive as good as possible.He confirmed the non-highlighting during stepping. He will try to dig into and to solve if possible.BRPeLuLe

author: nikonoid
author_rank: Regular Contributor
timestamp: November 13, 2018, 03:11:26 am
content: PeLuLe,I just found a work around for stepping through in EZGPIB:When break point line is active it actually changes the color from Red to White.So if you go and put break point on every line (F5), then you can keep hitting Run (F9) and the program will execute line by line, highlighting current line.Good luck.PS. I am actually using your EZGPIB code to dump cal from my 1281. Thanks.

author: pelule
author_rank: Frequent Contributor
timestamp: November 14, 2018, 10:16:19 pm
content: Hi nikonoidChecked your tip - yes it is a workaround, even it needs a breakpoint at each single line.Thanks for the tip./PeLuLe
DMM silicone bumpers supplier? - Page 1
Forum section: electronics / testgear

author: 001
author_rank: Super Contributor
timestamp: November 14, 2018, 09:59:58 am
content: Can You say how to find silicone bumper for discontinued DMM?Some universal gear will be ok tooIs a way to make one DIY?

author: Fungus
author_rank: Super Contributor
timestamp: November 14, 2018, 10:25:15 am
content: I looked in my crystal ball but I can't see the exact brand/model of your DMM from here, you're blocking the view. Can you move a bit to the left?

author: coromonadalix
author_rank: Super Contributor
timestamp: November 14, 2018, 11:23:17 am
content: 001 could you be more specific when you post an request ?And yes you have plenty DIY tutorials, search youtube about sillicon molding, you should do some of you own search before requesting ....

author: tom66
author_rank: Super Contributor
timestamp: November 14, 2018, 11:27:12 am
content: I think they are cold silicone molded, something that can be done with 3D printed molds if you're so interested.
Combining channels does not lead to increased sample rate... - Page 1
Forum section: electronics / testgear

author: Kirkhaan
author_rank: Frequent Contributor
timestamp: November 13, 2018, 08:06:34 pm
content: This is what the front panel of my Waverunner 6030A shows:While this is what is stated in the manual:No big deal for me, but a bit misleading I would say!

author: tautech
author_rank: Super Contributor
timestamp: November 13, 2018, 08:13:34 pm
content: I think you may misunderstand the scope architecture.Dual means using 2 channels in any configuration so they are each on separate ADC's so with only one channel on an ADC the max sample rate is still maintained. This principle can also apply to the best usage of the internal memory depth.

author: Kirkhaan
author_rank: Frequent Contributor
timestamp: November 13, 2018, 08:21:47 pm
content: I know there are two 5GS/s ADC's in there (per section 4.6.2 of the service manual).In the acquisition menu I can choose to run 4 channels simultaneously at 2.5GS/s.But I cannot run 2 channels interleaved at 5GS/s, which the front-panel text would indicatie to me.At least I haven't found how and looking at the manual its not possible with this model.

author: tautech
author_rank: Super Contributor
timestamp: November 13, 2018, 08:29:12 pm
content: Quote from: Kirkhaan on November 13, 2018, 08:21:47 pmEven with a 1+3, 1+4, 2+3 or 2+4 configuration ?One of these combos should allow 5Gsa/s.

author: Kirkhaan
author_rank: Frequent Contributor
timestamp: November 13, 2018, 08:51:47 pm
content: You would expect so indeed, but I do not manage. Perhaps its my stupidity.Reading page 25 of the 6KA manual gives me some hope, despite the screenshot from my first post...

author: tautech
author_rank: Super Contributor
timestamp: November 13, 2018, 09:00:04 pm
content: Quote from: Kirkhaan on November 13, 2018, 08:51:47 pmThat is exactly as the newish SDS1004X-E are branded and indeed offer interleaved operation....Dual, Quad.See the front on magnified image here:https://www.siglentamerica.com/digital-oscilloscopes/sds1000x-e-series-super-phosphor-oscilloscopes/

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: November 13, 2018, 10:49:27 pm
content: Believe it or not, we actually just released a video today where we discussed this:Just a warning, it's not the most thrilling series but covers a lot of topics.Essentially, this class of scope has one acquisition system per two channels. So, you can spend 100% of your ADC on one of those channels (5 GSa/s) or split it between two channels (2.5 GSa/s). If you have a four channel scope, you basically have two acquisition systems and can get two channels running at 5 GSa/s. Usually this means you can use 1 OR 2 and 3 OR 4 at 5 GSa/s. I believe some manufacturers may mix up the channel numbering scheme, but this is pretty industry standard. An easy way to check is to turn on one channel (at 5 GSa/s), and see if you can turn on one of the other channels without halving your sample rate.
tektronix version of Benchvue? - Page 1
Forum section: electronics / testgear

author: Pack34
author_rank: Frequent Contributor
timestamp: November 13, 2018, 12:29:11 am
content: Is there an equivalent first part program like Benchvue, but for Tek scopes? I'm going to be outfitting a lab and I'm a bit agnostic of the brand as long as they can do what I need. One thing that's going to be critical is the ease of automating tasks. With Benchvue you can do it quick and easy with a first party tool but also accomplish the same with some Python scripts.I can see some Python examples for Tek on Youtube and Github, but not immediately seeing an out-of-the-box tool

author: ivaylo
author_rank: Frequent Contributor
timestamp: November 13, 2018, 07:18:02 am
content: There is the SignalVu thing, not sure how close to what you need though.

author: alm
author_rank: Super Contributor
timestamp: November 13, 2018, 11:17:10 am
content: For basic functionality with the non-Windows-based scopes, there is the freeOpenChoicesoftware. Though it doesn't seem to be maintained much (last update 2016, supports Windows 7 and 8.1).

author: Brad O
author_rank: Regular Contributor
timestamp: November 13, 2018, 04:23:56 pm
content: I'm not terrible familiar with the Tek scope software, but there's TekSmartLab which is specifically for managing labs (https://www.tek.com/teksmartlab). TekBench is I think the closest equivalent to BenchVue though (https://www.tek.com/tekbench). SignalVu is for RF analysis, so probably not what you're looking for (https://www.tek.com/product-software-series/signalvu-pc).
121GW Ordering and Availability - Page 1
Forum section: electronics / testgear

author: Stu
author_rank: Newbie
timestamp: November 13, 2018, 05:39:45 am
content: I apologize if I missed it somewhere, but I can't seem to find any info on what the status of the project is.I'd love to order a 121GW, but every time I check the site, they are sold out.Is there any particular place where Dave is posting info and updates?Is it going to be one of those things where thousands of people want one but only a hundred get made at a time?Is there a waiting list to get on?Is there going to be a large enough quantity made where everyone that wants one will be able to buy?I need another multimeter, but I can wait a bit. Depending on how long I might have to buy something else.Even if it is going to be quite a while, at least having a timeframe would help.I like all of the cool features with the phone app and logging capabilities.I heard some comments that the firmware/software was a bit "beta". Has that all been cleared up?Thanks for the info

author: HKJ
author_rank: Super Contributor
timestamp: November 13, 2018, 07:22:42 am
content: It is not sold out everywhere:https://www.welectron.com/EEVBlog-121GW-Data-Logging-Multimeter-with-Bluetooth
Do benchtop ACV averaging meters still exist?  - Page 1
Forum section: electronics / testgear

author: vini_i
author_rank: Regular Contributor
timestamp: November 12, 2018, 04:19:48 pm
content: I'm trying to automate a process. Currently when the process is performed manually and an AC voltage reading is taken. The signal that is measured is very distorted and has a crest factor greater than 5.This is both historic and technical but the meter used to measure that signal is an averaging AC meter (NOT True RMS) like a Fluke 88. This is because a True RMS meter does not give a stable reading and an averaging meter has been used for many years.Are there any benchtop meters left that perform ACV measurements as an average (NOT True RMS) and support comms such as LXI, GPIB or RS232?

author: Tomorokoshi
author_rank: Super Contributor
timestamp: November 12, 2018, 05:57:54 pm
content: I don't know of any because I haven't looked, but there are some things to take into consideration:1. What model of meter are you using now?2. What is the bandwidth, or range of the frequency components of this distorted signal?3. What is the averaging response time of the original meter? This is related to its bandwidth.4. What is the integration time of the RMS meter that was tested?

author: alm
author_rank: Super Contributor
timestamp: November 12, 2018, 08:04:05 pm
content: The Keithley 2001 and 2002 are able to measure average ACV (though not converted to RMS value like most average-responding meters, so you'll have to convert). With the Keithley 2001-M firmware, the Keithley 2001 should also be able to measure RMS ACV based on the average AC voltage.I also wonder if a good true RMS meter will not be able to reliable make this measurement, though again you will need to experimentally determine the conversion factor from results from an average-responding meter to the true RMS measurements.

author: wraper
author_rank: Unknown
timestamp: November 12, 2018, 08:11:34 pm
content: Keysight 34461A can measure with factor up to 10 without additional measurement error. AFAIK it uses fast ADC instead of traditional True RMS-to-DC converter IC.
Rigol oscilloscope triggering - Page 1
Forum section: electronics / testgear

author: cap4096
author_rank: Contributor
timestamp: November 13, 2018, 04:14:57 pm
content: Hi!I am trying to detect if two signals are going high at the same time, it is important that the two signals never are high at the same time. Is there any trigger condition on a Rigol 4054 or Rigol 1054z that can detect if CH1 and CH2 or CH3 and CH4 goes high?To clarify i would like to capture if:CH1 and CH2 goes high ORCH3 and CH4 goes high./cap4096

author: metrologist
author_rank: Super Contributor
timestamp: November 13, 2018, 04:33:57 pm
content: Maybe with a pass/fail mask test? Here is an image:https://www.eevblog.com/forum/testgear/rigol-oscilloscope-remote-control-using-ni-visa/And there is also pattern trigger which can trigger when one channel high and other low or high, etc.

author: Fungus
author_rank: Super Contributor
timestamp: November 13, 2018, 05:30:45 pm
content: Quote from: cap4096 on November 13, 2018, 04:14:57 pm"Pattern Trigger" is the AND of two channels.I don't think you can do two at once though. Maybe get some 74LS logic chips...(or program an Arduino of the signals aren't in the multi-MHz range).

author: Keysight DanielBogdanoff
author_rank: Unknown
timestamp: November 13, 2018, 05:50:07 pm
content: I'm not 100% sure on the Rigol, but it's possible you could do this with digital channels. The external trigger chips are a good idea as well, you could use some logic gates as a "probe." It does depend on your speeds, of course.

author: wolfp
author_rank: Contributor
timestamp: November 13, 2018, 06:18:20 pm
content: What about adding the channels and trigger if the voltage of the result is larger than a logic 1?I dont know if it works with Rigol scopes.

author: Fungus
author_rank: Super Contributor
timestamp: November 13, 2018, 06:27:33 pm
content: Quote from: wolfp on November 13, 2018, 06:18:20 pmIt would work, but... the 'scope already has a special trigger mode for the "AND" of two channels, might as well use it.(and the OP wants to usefourchannels so both methods fail).
HP 8594E Help with Cal Reference Adjustment - Page 1
Forum section: electronics / testgear

author: xrunner
author_rank: Super Contributor
timestamp: November 09, 2018, 11:42:41 pm
content: I'm measuring the 300 MHz Cal output like it states, and it's about 80 Hz off.I do the following -QuoteBut no change I make to the DAC values makes any change in the Cal frequency whatsoever.What am I doing wrong?

author: Miti
author_rank: Super Contributor
timestamp: November 10, 2018, 03:21:10 am
content: Does it have option 004, maybe?

author: xrunner
author_rank: Super Contributor
timestamp: November 10, 2018, 03:28:24 am
content: Quote from: Miti on November 10, 2018, 03:21:10 amThanks for responding.No, it does not. I did read about that option adjustment in the procedures. It doesn't list that option on the back with the other options it has. Seems strange that it would give the DAC control and not have it do anything if it was meant to have it adjusted internally.Do you think I should inspect the unit inside for that adjustment?

author: Miti
author_rank: Super Contributor
timestamp: November 10, 2018, 12:31:11 pm
content: Check in the software. There's a way to display the options, maybe it was added later and not added to the list on the back. Or you can open it and look inside.

author: xrunner
author_rank: Super Contributor
timestamp: November 10, 2018, 12:58:15 pm
content: Quote from: Miti on November 10, 2018, 12:31:11 pmYea I'll get in there and see what I can find. I'm going to a local Hamfest this morning but will report back later ...

author: xrunner
author_rank: Super Contributor
timestamp: November 10, 2018, 11:57:59 pm
content: Well you were right - it does have the 10 MHz Precision Frequency Reference. Here are some before and after pics of the adjustment. Frequency counter is referenced to my GPSDO. Everything is spot-on now.

author: Miti
author_rank: Super Contributor
timestamp: November 11, 2018, 04:54:55 pm
content: I have the same SA and I also have a GPSDO that I just finalized recently. I remembered that some time ago I adjusted the reference oscillator in the SA using just a Ublox GPS module set to output a 10MHz frequency and watching the drift on an oscilloscope. I was curious what's the result of that adjustment now that I have a reliable GPSDO.Here's the result after about 4 - 5 hour warm-up. It was within 3 - 4 counts after about 2 hours.

author: xrunner
author_rank: Super Contributor
timestamp: November 11, 2018, 11:29:45 pm
content: Quote from: Miti on November 11, 2018, 04:54:55 pmThat's great. The manual says to let the ref. osc. warm up for 24 hours before adjustment, but after an hour it wasn't moving so I went ahead and adjusted mine. After less than 10 m warmup now it is good to go @ 300.000000 MHz.
trouble with Rigol DS1042C - Page 1
Forum section: electronics / testgear

author: camiel.nijpels
author_rank: Newbie
timestamp: November 11, 2018, 08:45:13 pm
content: Hallo everyone!I recently got an old rigol DS1042C scope. I was wondering if anyone knows how to connect the scope to my pc.i tried looking it up in the user manual but there is no info on how to connect it to the ultrascope software.in the menu (on the scope) it has the option to change the baud rate for the rs 232 port, but i can't find anything on the usb port.also in the ultra sigma software there is no option for this particular scope.
Viewing Agilent 1672G data on PC? - Page 1
Forum section: electronics / testgear

author: iry100fan
author_rank: Newbie
timestamp: October 24, 2018, 01:12:21 am
content: Hi everyone,I have an Agilent 1672G logic analyzer and am wondering if anyone out there knows of any utilities for viewing the captured data on a PC. Trying to visually scan through the waveforms on the unit is intolerably slow. I can download the captured data to my PC via FTP but I haven't found anything that can interpret it. Any suggestions?Thanks.-Brian

author: alm
author_rank: Super Contributor
timestamp: November 11, 2018, 07:24:11 pm
content: Thesoftware for the Agilent 1680/1690/16900 seriescan read HP 16700-series fast binary files, but not HP 16500-style files as far as I know (wouldn't hurt to test). If you downloaded the data via FTP, then stripping off the LIF header (see the 1670 users manual) might help. The data format (without LIF header) is described in the programmer's manual, and it may be feasible to convert it to somethingPulseViewcan read.Instead of visually scanning, could you set up a trigger or use the built-in search instead?
CMU200 Error message - Page 1
Forum section: electronics / testgear

author: Virul
author_rank: Newbie
timestamp: September 21, 2018, 09:02:13 am
content: Good morning, and congratulations for the forum.Thanks to you I have been able to reinstall my CMU200 and activate all the necessary functions.I recently bought a CMU200 from an extremely reliable seller (gave me a guarantee), at a very affordable price (380 euros ...), in perfect aesthetic condition.Now I have a problem, when I try to activate WCDMA FFD Segnaling, I get the error message visible in the picture.All software is updated to the latest release.Does anyone have experience and can help me?Hardware problem, or software ?Board B56 and B68 present.Thank you.

author: drew23
author_rank: Contributor
timestamp: November 11, 2018, 05:08:47 am
content: Hi. If you still have the problem, boot up to MSDOS and do a CHKDSK to see if there are any issues with the HDD. It is worth copying the HDD to DVD and using a new HDD. Regards Drew VK4ZXI
SPD3303X-E firmware failure - Page 1
Forum section: electronics / testgear

author: mojoe
author_rank: Frequent Contributor
timestamp: November 10, 2018, 02:52:54 am
content: Does anyone know how to recover from a failed firmware update? When I went to update, I may have accidentally clicked the Update button in EasyPower twice. The update hung at 2%. I waited quite a while, but it didn't finish. I didn't have any choice but to quite EasyPower and power off the supply. Now when it powers on, all the lights are lit, but the screen is black.Updating my second supply completed successfully.

author: tautech
author_rank: Super Contributor
timestamp: November 10, 2018, 04:38:22 am
content: Quote from: mojoe on November 10, 2018, 02:52:54 amNah sorry but I'll ask tech support.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: November 10, 2018, 02:52:48 pm
content: I had this problem, you have to press and hold in the twiddly knob while you power on. Then you'll be able to upgrade. This happened to me because I didn't select the 'Firmware Mode' in EasyPower. It's on page 33 of the UG.

author: mojoe
author_rank: Frequent Contributor
timestamp: November 10, 2018, 09:49:28 pm
content: That worked! Thanks a lot. Last night, I tried holding various buttons while powering on, but I didn't think to hold in the knob.

author: Gandalf_Sr
author_rank: Super Contributor
timestamp: November 11, 2018, 12:17:06 am
content: Cool! I'm glad I could help.
ProbeMaster Needle  PN#8152 Damaged - Page 1
Forum section: electronics / testgear

author: joeqsmith
author_rank: Super Contributor
timestamp: November 15, 2018, 03:04:14 am
content: I have used Probe Master probes for some time and have really liked them. The other day I was doing some work and my meter started acting up and I realized one of the probes had gone bad.These probes are their spring loaded needles. I've had this set for several years. The only time these were damaged is when I had loaned them out and the person used the needle as a pry bar. The needles are replaceable, so not as bad as the person that rotated the selector switch past the dead stop on my meter.https://probemaster.com/spring-loaded-micro-tip-test-leads-only/What happened is the receiver for the pogo pin had snapped off right at the base. I had some receivers from Evert Charles with a WW end. These are pretty solid. Ended up replacing both receivers. I was looking over what I had left from the Fairchild days and found some old flux buster pins that look like they may do a better job than the needles for the majority of the work I use the meter for. That's on of the nice thing about the PN# 8152 probes is they use industry standard pins.I think the problem is the plastic ends that fit over the receivers has come loose from time to time which puts a strain on that joint where it is soldered. Not a big deal but there seems to be room for improvement. At least they can be repaired.Also shown are my old PM probes that I use with my old HP bench meter. These are an unplated stainless tip. Nice thing with these is a little wet sanding and they are resorted to a needle point.
Mystery Philips PR9255 "Vibration Meter" - Page 1
Forum section: electronics / testgear

author: SaabFAN
author_rank: Frequent Contributor
timestamp: November 10, 2018, 12:06:54 pm
content: I came across a Philips "PR9255 Vibration Meter" on ebay.Link:https://www.ebay.de/itm/Vibration-meter-Philips/202494220105?_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D20170221122447%26meid%3De2a2985ec4924b65948496c782c105be%26pid%3D100752%26rk%3D2%26rkt%3D6%26sd%3D202494220729%26itm%3D202494220105&_trksid=p2047675.c100752.m1982So far, all my Google-Searches come up empty.Does anyone have any information about this thing?I'm guessing it requires a special sensor or at least a specific voltage-range from a sensor to measure vibrations.
MOVED: Agilent ESG E4435B signal gen - no output at some frequencies - Page 1
Forum section: electronics / testgear

author: Leo Bodnar
author_rank: Frequent Contributor
timestamp: November 09, 2018, 09:51:46 pm
content: This topic has been moved toRepair.https://www.eevblog.com/forum/index.php?topic=150001.0
Help recognizing resistor decade - Page 1
Forum section: electronics / testgear

author: Radec
author_rank: Newbie
timestamp: November 08, 2018, 01:46:51 pm
content: Hello, i stumbled upon an online "resistor decade", but I can't seem to recognize what it actually is. As you can see from the pictures there are 6 identical modules. Each has 2 sets of inputs labeled A and V so at first glance I thought they were supposed to be used for Kelvin 4 point measurements, but then I noticed the little switch that switches between them and that each decade is connected to either V or A labeled inputs.Has anyone seen a decade like this one? What it is used for? Thanks!

author: Radec
author_rank: Newbie
timestamp: November 08, 2018, 02:36:44 pm
content: Forgot to include the picture of the switch, sorry :)1

author: bson
author_rank: Unknown
timestamp: November 08, 2018, 06:48:32 pm
content: Perhaps A is for measuring current and V voltage? Check if the A terminals are open when the switch is in the on position and closed when off?

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 08, 2018, 06:50:04 pm
content: Regardless of what it does, it seems to be a very attractive looking set.

author: babysitter
author_rank: Frequent Contributor
timestamp: November 08, 2018, 07:18:54 pm
content: I cant tell you exactly why, but it looks like teaching equipment from a school to me.

author: Radec
author_rank: Newbie
timestamp: November 09, 2018, 06:08:27 am
content: Hm, It hadn't occured to me that itcould be a school piece - this is a possible one. I got mislead by the fuse because I'm so used to seeing these kind of fuses on industrial grade equipment... As for trying the switch - i don't actually own the decade yet as I'm trying to figure out what it actually is before byuing it - a ki d of a puzzle. My best bet was that it was a decade for callibrating temperature measurement systems because:1. It has all ki d of quality check stamps in japanese over it so it must have been used somewhere that needs periodical qc and callibration2. The range of the decades themselvesThe bigger decade is rated either from 0 to 450 ohms or kohms and then a single 500kohm value or just from 0 to 500 kohms. The latter is an ordinary decade, but the first one seems , if memory serves me well, like a range of zero degree celsius thermocouple values. That would also tie to the values of the second decade which go from 0.1 ohms to 1 ohm in steps of 0.1 which seem like the temperature coefficient of a thermocouple per degree celsius. If so then the two decades should be connected in series and then a kelvin measurement using the A and V inputs would be the final piece, but then I noticed the damn switch which switches between them and my speculations went the way of the dodo. Does any of the above seem plausible?
Any interest in replacement waterslide transfers for Tek 465 / 457 buttons/knobs - Page 1
Forum section: electronics / testgear

author: bd139
author_rank: Super Contributor
timestamp: November 08, 2018, 05:35:20 pm
content: I've restored a pile of 465 / 475 scopes over the last few years and one thing I haven't managed to get on top of is where the selector buttons and knobs have legends worn off or washed off by accident.Ergo I have done some investigation into producing some waterslide decals for the job to match the originals.Would anyone be interested in sets of these?This is a pie in the sky idea so far but the plan would be to provide a full set of button legends and timebase settings for knob skirts. They would be 100% original typeface and sizing - I am not the sort of person who would stuff green comic sans on there or something. Not sure of pricing yet for reference but this certainly isn't kickstarter material
Agilent 54642D runs really hot.. Normal? - Page 1
Forum section: electronics / testgear

author: Haatveit
author_rank: Regular Contributor
timestamp: July 02, 2018, 07:00:57 pm
content: I just got this today. Spent a bit of time cleaning it up, then powered it on and spent maybe 20 minutes familiarizing myself a little bit with it. It's a hot day (for Norway anyway), so my senses weren't really paying attention... Until I touched one of the front BNC terminals to unplug a 90* angle, and it wasreally hot. Like, almost too hot to touch - not quite that bad, but seriously pretty close. The fan works fine, it's brand new, and moves more air than the old fan did anyhow. It was only after touching the first BNC that I actually noticed that there's like seriously hot air wafting off of the front panel, it's all very warm, or in the case of anything made of metal, quite hot indeed.It this normal...? The scope works fine otherwise.

author: bd139
author_rank: Super Contributor
timestamp: July 02, 2018, 08:28:01 pm
content: Yeah there’s a big ass chunk of metal with two massive heat sinks and hybrids bolted to it. This results in the BNCs getting hot. They get quite toasty indeed. Make sure the fan works properly and it will be fine.Even the lower end units get pretty hot.

author: AllTheGearNoIdea
author_rank: Unknown
timestamp: July 02, 2018, 08:34:26 pm
content: I don’t even know what this is but my HP rack mounted universal counter gets silly hot if I remove the top cover as the fan does not draw the air over the components with the lid off.Just a thoughtRegards Chris

author: abraxa
author_rank: Frequent Contributor
timestamp: July 02, 2018, 08:48:02 pm
content: http://wonghoi.humgar.com/blog/2016/07/24/agilent-54641d-fan-mod/might be relevant here.

author: Haatveit
author_rank: Regular Contributor
timestamp: July 02, 2018, 09:48:25 pm
content: That's a nice fan mod there, I might do the same. I noticed that putting an external fan near the vents on the bottom of the unit, even on very low settings, made an enormous difference. Must be completely still air inside there, takes very little to alleviate it.But, the mere existence of the mod also answers my question, so that's two birds with one stone. Cheers!

author: nicbul
author_rank: Newbie
timestamp: November 07, 2018, 09:25:40 pm
content: I just acquired a 54641D on the weekend and the first thing I noticed about it was how hot it ran! It did fail the user cal however that may have been a cabling/connector issue. Came across this thread after a quick search and I decided to install the blower fan today. Works like a charm and the temperature stabilizes quite quickly now. The breeze from the front panel isn't quite that tropical!Of course, I do notice that placement of the instrument really impacts the operating temperature. The difference in temperature between the scope being on the bench with the tilting bale out and the scope being flat on a shelf is about 10C.
Transistor Tester Windows PC Software - Page 1
Forum section: electronics / testgear

author: Messtechniker
author_rank: Frequent Contributor
timestamp: October 19, 2018, 12:10:54 pm
content: Hi Transistor Tester community,I am pleased to announce a piece of PC software for the infamous Transistor Tester. Its home is here:https://www.mikrocontroller.net/svnbrowser/transistortester/Software/Messtechniker/You will need a Transistor Tester (TT) running firmware v1.33m or higher with UART input and output enabled and an UART to USB converter. Prolific, CP2102 or FTDI FT232RL, for example. More information in the help file.This software is not intended to replace a TT's display. Rather it is intended to facilitate matching of resistors as well as documenting the measurements. Piccy enclosed.If the comments are not too harsh, a version for capacitors will be forthcoming soon.Anyway have fun.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: October 19, 2018, 12:35:26 pm
content: I like it. Good idea.

author: madires
author_rank: Super Contributor
timestamp: October 19, 2018, 12:52:47 pm
content: And don't forget to enable UI_SERIAL_COMMANDS also

author: Messtechniker
author_rank: Frequent Contributor
timestamp: October 26, 2018, 07:30:00 am
content: The capacitor version of this prog is available now.See link in first post.

author: Kalvin
author_rank: Super Contributor
timestamp: October 26, 2018, 07:46:13 am
content: If one can download the new firmware from PC into the tester "as needed", one can extend and use the existing tester hardware as multipurpose testing device with many new capabilities without memory limitations: Just download a new firmware which will implement the required functionality.

author: 001
author_rank: Super Contributor
timestamp: October 26, 2018, 07:50:14 am
content: awesome app

author: Messtechniker
author_rank: Frequent Contributor
timestamp: November 01, 2018, 08:43:49 am
content: And the next one has made it into the SVN. Link above.BJT hFE for the transistor tester is there facilitating easy hFE matching of transistors.Have fun.

author: Messtechniker
author_rank: Frequent Contributor
timestamp: November 06, 2018, 07:07:04 am
content: And the next one has made it into the SVN. Link above.JFET IDSS for the transistor tester is there facilitating easy IDSS matching of JFETs.This is the last one of this series.If any tt firmware updatesforce me to update these proggies too - simply watch this space.Have fun.

author: v11
author_rank: Newbie
timestamp: November 06, 2018, 09:01:55 pm
content: @ MesstechnikerThanks for your work.You are a genius.BR.
Teledyne Test Tools rebranding Siglent - Page 1
Forum section: electronics / testgear

author: scopeman
author_rank: Frequent Contributor
timestamp: November 06, 2018, 04:23:41 pm
content: How about this:Looks like Teledyne Test Tools (New one on me) is rebranding Siglent and bumping the price through the roof.I just thought that you would find this interesting. Also no Siglent products appear on TEquipment.net anymore. Does this mean that Teledyne has bought the rights to market Siglentproducts in the U.S. at ridiculously high prices? Will the Siglent brand continue to be sold by Saelig and others at the same reasonable prices?Tell me why I would buy this for $3147.00https://www.tequipment.net/Teledyne-Test-Tools/T3SA3100/Spectrum-Analyzers/?v=7457When I can buy the identical thing with the tracking generator and 1Hz resolution bandwidth for $1395.00 and get excellent Saelig support:http://www.saelig.com/siglent-spectrum-analyzers/ssa3021x.htmThe only difference is the label on the top of the instrument. Certainly not worth the $1752.00 difference Do they really think that engineers won’t research or find this out?Oh I get a free bag with either one.SamW3OHM

author: tv84
author_rank: Super Contributor
timestamp: November 06, 2018, 04:35:56 pm
content: Quote from: scopeman on November 06, 2018, 04:23:41 pmMaybe Trump vetoed Siglent...

author: Fgrir
author_rank: Regular Contributor
timestamp: November 06, 2018, 05:02:04 pm
content: Funny thing is Saelig is currently selling both brands:http://www.saelig.com/category/teledyne-lecroy.htm

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: November 06, 2018, 05:29:52 pm
content: there is already a tread about it, possible to merge together?https://www.eevblog.com/forum/testgear/lecroys-new-test-tools-series-of-test-instruments/

author: tautech
author_rank: Super Contributor
timestamp: November 06, 2018, 06:10:40 pm
content: Quote from: scopeman on November 06, 2018, 04:23:41 pmOld news, LeCroy have a long standing relationship with Siglent.They have developed some past products as joint ventures.A few other examples from another thread:Quote from: tautech on May 31, 2018, 09:24:49 am