hybridfree/eevblog-posts huggingface dataset:
Fixing duplicate Ethernet MAC address in siglent equipment - Page 1
Forum section: electronics / testgear

author: qball
author_rank: Newbie
timestamp: December 30, 2022, 12:11:45 pm
content: I received a siglent DMM today, after installing I noticed I got the IP address from a siglent signal generator.Turns out these devices both have the same mac address, so my router hands out the same ip to them.I tried searching if I can change it but so far no luck, I can give on a fixed ip, but I strongly prefer to have it centrally managed.Does anybody know if siglent has a (hidden) command to change the mac address?(DMM is the SDM3065X)

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 30, 2022, 03:55:11 pm
content: for Siglent! Yes you can assign it a fixed IP but if both the DMM and the signal generator are powered your switch will get very confused, they normally maintain a table which MAC address is on what port. I highly doubt that you can change it yourself and personally I would send it back to have it swapped, hoping that you don't receive one with the same problem.

author: Fungus
author_rank: Super Contributor
timestamp: December 30, 2022, 04:40:38 pm
content: Quote from: qball on December 30, 2022, 12:11:45 pmSiglent quality.

author: tv84
author_rank: Super Contributor
timestamp: December 30, 2022, 04:44:00 pm
content: Quote from: Fungus on December 30, 2022, 04:40:38 pmNahh... they probably sold more than 4B devices and now are reusing...

author: nctnico
author_rank: Super Contributor
timestamp: December 30, 2022, 04:45:25 pm
content: Quote from: qball on December 30, 2022, 12:11:45 pmA fixed IP won't work because the MAC address is what is used to direct traffic on a local network. Your only option is to return the DMM for a replacement. Make clear to the supplier that this particular DMM can not be used on your network and that you will need a different one.

author: The Soulman
author_rank: Super Contributor
timestamp: December 30, 2022, 04:56:04 pm
content: Quote from: nctnico on December 30, 2022, 04:45:25 pmYeah, but what are the odds that a different meter doesn't have the same mac-adress?

author: tv84
author_rank: Super Contributor
timestamp: December 30, 2022, 04:59:45 pm
content: Samehere.Maybe it's possible to change it with the SCPI command::SYSTem:COMMunicate:LAN:MACI don't remember anyone trying...

author: nctnico
author_rank: Super Contributor
timestamp: December 30, 2022, 05:07:23 pm
content: Quote from: The Soulman on December 30, 2022, 04:56:04 pmOffically any piece of equipment with an ethernet interface should have the MAC address printed on the outside (on a sticker). So it should be easy to check by the supplier. Ofcourse there is always the possibility the manufacturing process at Siglent is somehow broken and all units are shipped with a factory default address. Easy to find it if the actual MAC address differs from what is printed on the sticker.
Large Offset on Rigol DS1054Z - all channels - Page 1
Forum section: electronics / testgear

author: skua47
author_rank: Newbie
timestamp: December 29, 2022, 02:27:22 am
content: Hi,I am seeing large offsets in the data collected on my DS1054Z (SN: DS1ZA163554597).The table below shows the offsets in the data. I used the average math function on the scope to calculate the offset.Note that the POS dial is set to 0, except for the smallest range. Changing the POS value makes no difference in the offset and turning the AC coupling does not affect the observed offset. I checked with another scope and with a multimeter, the function generator does not account for the offset.The attached graph shows the result when the same input is presented to both CH1 and CH2. As you can see, both channels have the offset, but the offset on Channel 1 is most severe.Is there a procedure to calibrate the scope inputs or does the scope require repair? What can you suggest to correct this issue.Offset (mV)Range (V/div) Channel 1 Channel 2 Channel 3 Channel 410 875 630 1001 7805 980 379 654 5402 940 379 399 1601 1010 391 367 1840.5 1040 370 390 1600.2 17 82 13 190.1 19.3 16 8 .6 110.05 17.7 9 6 50.02 20 7.7 7.3 40.01 20.4 8 7.8 40.005 20.8 7.7 7.7 3.30.002 20.8 7.6 7.7 3.10.001 20.5 7.6 7.8 3.1Small shift in offset with BW limit on or off - These are for BW limit off1X probe, normal modeThanks.David

author: ataradov
author_rank: Super Contributor
timestamp: December 29, 2022, 02:35:33 am
content: There is internal calibration procedure that you can run from the menus. If that does no help, then there is not much you can do.

author: Fungus
author_rank: Super Contributor
timestamp: December 29, 2022, 07:35:23 am
content: Quote from: skua47 on December 29, 2022, 02:27:22 amYes.Read the manual.

author: skua47
author_rank: Newbie
timestamp: December 29, 2022, 09:02:58 pm
content: ThankYouVeryMuch!

author: skua47
author_rank: Newbie
timestamp: December 29, 2022, 09:05:12 pm
content: Thanks,I finally found the procedure listed in the manual. The calibration seemed to work. I am really surprised though and how far out the offset was. 1 V seems entirely unacceptable for a commercial instrument.

author: skua47
author_rank: Newbie
timestamp: December 29, 2022, 09:07:41 pm
content: Hi All,I did the calibration (difficult to find menu item) and all seems well now. I think the fact that the offset was so extreme made me consider a hardware fault. Anyway a lesson to regularly run the calibration function on this scope.Thanks
SDS1104X-E/1204  Cursor Message Box transparency -- how to make it see-through? - Page 1
Forum section: electronics / testgear

author: pOM
author_rank: Contributor
timestamp: December 28, 2022, 07:40:57 pm
content: (Scope version info image attached.)Can the "transparency" of the cursor message box background be increased so that it doesn't block waveforms in that space?I didn't find anything in my search here (I might have missed with incorrect keywords), but there are posts mentioning this same issue. The User Manual I have (UM0101E-E03C) has this instruction on page 132:"To adjust the transparence of the cursors message box, press the Display/Persist softkey and go to the second page, press the Transparence (20% to 80%) softkey and then turn the Universal Knob to adjust the transparence to the desired value."But there's no apparent change when varying the level between minimum and maximum (see attached). When using the universal knob to change the indicated %, there's a horizontal rectangular box below the cursor box with a moving bar inside. As the % is increased, the bar moves to the right but also becomes more transparent, so that when set to 90% (max), the bar itself is invisible. But there's no change in the cursor box background.Am I missing a step, or doing it totally wrong, or, is the transparency of the cursor message box not variable?

author: 807
author_rank: Frequent Contributor
timestamp: December 29, 2022, 12:30:48 am
content: Despite the manual saying that the Transparence setting works with the cursor box, mine doesn't either.It works fine with the Statistics & All Measure boxes though.

author: BillyO
author_rank: Super Contributor
timestamp: December 29, 2022, 12:44:52 am
content: Maybe Siglent need to be made aware as it is a bit of a usability issue. It could probably be fixed fairly easily.

author: rf-loop
author_rank: Super Contributor
timestamp: December 29, 2022, 11:57:46 am
content: It do not work now for cursors message box.But other thing: I will recommend latest User Manual instead of quite old version.Latest User Manual for all SDS1000X-E/X-U series oscilloscopes can download here:https://www.siglenteu.com//wp-content/uploads/dlm_uploads/2021/08/SDS1000X-ESDS1000X-U_UserManual_EN05B.pdf

author: pOM
author_rank: Contributor
timestamp: December 29, 2022, 10:53:13 pm
content: Thanks all for the confirmations that the transparence issue isn't just my SDS1104X-E.Hopefully, now, a fix will be included in a future firmware update.
Rigol DP2000 - Page 1
Forum section: electronics / testgear

author: tangram
author_rank: Contributor
timestamp: September 12, 2022, 11:21:24 pm
content: Been running through a repair (again!) and recalibration on my DP832, it occurred to me that this is a pretty good PSU, but it's getting a bit long in the tooth. I asked the question, has there been any mods done recently? The answer was 'yes' and it comes in the form of a couple of new, at least new to me, models. I can't see that the DP900 is much of a step, but the DP2000 has a couple of interesting features, including better accuracy on output values (V & I), better resolution of current output and, a feature I've missed on my box, 4-wire voltage output, I. E. Its got voltage sense control, a real boon for high current applications. There's very few reviews out there, however. Has any one of you guys/gals got one of these puppies? Is it worth the outlay?

author: Xoff
author_rank: Contributor
timestamp: December 28, 2022, 09:03:23 am
content: I've just got DP932E. Main improvements over DP832 are:- quick setting (larger touch-up screen),- low-noise fan,- internal parallel/serial connectivity of CH1 and CH2 (max 6A/60V),- 3 independent (separated) output channels (CH1 30V/3A, CH2 30V/3A, CH3 6V/3A).
HP 6673A Power Supply - removing option J08 - Page 1
Forum section: electronics / testgear

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: December 29, 2022, 01:32:32 am
content: Hi group,In this thread:https://www.eevblog.com/forum/testgear/hp-6671a-option-j05-j09-5v-250a-power-supply/msg713507/#msg713507I did a repair on an HP6671A and removed the option J05.This thread is about removing option J08 on an HP6673A.The base model is 35V and 60A. If option J08 is installed the power supply becomes 40V and 50A.I wanted to remove J08.SummaryChange about 10 resistors on the A5 control board.Reprogram the EEPROM on the front panel board. This can be done over the GPIB interface. I wrote a program based on the one provided in the service manual. I rewrote the program in VB.net and use the AR488 developed by forum member WaveyDipole.Calibrate the power supply. An accurate voltmeter and an accurate shunt are required for the calibration.I have attached a pdf file with the details.Regards,Jay_Diddy_Bscreen shot.PNG(94.95 kB. 898x663 - viewed 657 times.)
DSA815-TG question  - Page 1
Forum section: electronics / testgear

author: TheFrenchGuy
author_rank: Newbie
timestamp: December 28, 2022, 12:21:38 pm
content: HelloI would like to know if this type of spectrum analyzer can be used to locate certain switching power supply noises as well as to see the audio frequencies?I later want to do EMI compliance testing so I would need it to be versatile.the manual indicates that the central frequency can start at 0hz, I prefer to be sure.thank you
Looking for old Leader Manuals... - Page 1
Forum section: electronics / testgear

author: Unknown
author_rank: Unknown
timestamp: June 22, 2013, 05:39:34 am
content: for example:LAT-45LAG-25do you have some?

author: JohnnyP
author_rank: Regular Contributor
timestamp: June 27, 2013, 10:38:37 am
content: These guys had the schematics and operating manuals for my Leader LBO-315 (just got it running, by the way).http://artekmanuals.com/

author: Fluxed Matter
author_rank: Regular Contributor
timestamp: June 28, 2013, 02:37:00 pm
content: Contact Leader and they will email you the manuals, especially for their older equipment. I have a LBO 520A scope and they sent me the instruction and service manual for free.

author: calin
author_rank: Regular Contributor
timestamp: July 03, 2013, 05:42:40 am
content: i have the manuals for LBO-516 scope in PDF if u need them

author: Sam J
author_rank: Newbie
timestamp: October 18, 2013, 03:31:11 pm
content: Quote from: Fluxed Matter on June 28, 2013, 02:37:00 pmHi Fluxed,I'm Looking for Leader LBO-520A service manual.Would you upload the files to me, and I'm really appreciated.

author: Fluxed Matter
author_rank: Regular Contributor
timestamp: October 18, 2013, 05:34:28 pm
content: Hi Sam J,I have them on my home computer. I will upload them tonight when I get home.

author: Fluxed Matter
author_rank: Regular Contributor
timestamp: October 20, 2013, 09:59:11 pm
content: Sam J,Service manual for Leader 520A Oscilloscope. Hope this helps.Fluxed

author: Sam J
author_rank: Newbie
timestamp: October 20, 2013, 10:36:55 pm
content: Thanks alot Fluxed, that is exactly what I need.Have a nice day!

author: JohannP
author_rank: Contributor
timestamp: November 09, 2013, 10:05:21 am
content: Quote from: Fluxed Matter on October 20, 2013, 09:59:11 pmFluxed, thank you. I will put some new life in the old "Leader Scope".Best regardsJohann

author: pwgtang
author_rank: Newbie
timestamp: December 26, 2022, 08:18:44 pm
content: Hi, I had a Leader LBO-315 oscilloscope can't power up, I am looking for the service manual if someone can help, I try to repair it. Thanks.

author: electr_peter
author_rank: Unknown
timestamp: December 26, 2022, 09:56:37 pm
content: Hi,Quote from: pwgtang on December 26, 2022, 08:18:44 pmSome Leader manuals are herehttps://bama.edebris.com/manuals/leader/

author: pwgtang
author_rank: Newbie
timestamp: December 27, 2022, 06:56:48 pm
content: Thanks for the link, I checked they had LBO-325 but not LBO-315, the power supply section not the same, LBO-325 only works for AC power,LBO-315 works for 12VDC and AC power.

author: edavid
author_rank: Super Contributor
timestamp: December 27, 2022, 08:18:40 pm
content: Quote from: pwgtang on December 26, 2022, 08:18:44 pmIf you can't find a free copy, you can get it from Artek for $10:https://artekmanuals.com/manuals/other-manuals/
OWON HDS242 Warning About Inadvertent Language Switch - Page 1
Forum section: electronics / testgear

author: MrAl
author_rank: Super Contributor
timestamp: December 20, 2022, 03:27:38 pm
content: Hello there,I thought i should post this so that other users will know about this little problem.If you accidentally hit "Upgrade" on one of the menus the next time the device boots up the language is all Chinese. You wont be able to read any of the menu items unless you can read Chinese so it's tricky to get back to English or another language.To get back to English hit the "System" button then F2 then F1 once.Note again you wont be able to read any menus unless you can read Chinese. After the sequence above though it is all in English again.If you were using any other language i advise you to look at the sequence above before anything happens with the language. Keep hiting F1 until you get to the Chinese language, then count the number of times you have to hit it to get to your language. For example to get to German youwould have to hit F1 three times, but you may recognize the writing at that point. Once you get to your language, stop pressing F1 and then you can hit the back menu button (curved arrow) and that will put the device into your language mode. I dont think you have to reboot.

author: simple
author_rank: Newbie
timestamp: December 27, 2022, 03:40:56 am
content: Had the same issue,but it is an easy fix. It is in the instruction manual.

author: MrAl
author_rank: Super Contributor
timestamp: December 27, 2022, 10:45:07 am
content: Quote from: simple on December 27, 2022, 03:40:56 amI did not see anything in the instruction manual about that or how to read Chinese (ha ha).
Buying Used Test Equipment from China - Page 1
Forum section: electronics / testgear

author: chephato
author_rank: Contributor
timestamp: December 26, 2022, 07:44:47 pm
content: What are your thoughts on buying used test equipment (from well known brands, HP/Agilent/Keysight) off eBay from China and Singapore? Most of the time the prices are significantly lower than offerings from the Americas and Europe.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: December 26, 2022, 08:07:57 pm
content: Quote from: chephato on December 26, 2022, 07:44:47 pmIt would depend a lot of what site you are buying them from. Also I suspect Singapore is very different than China.I've bought several used Fluke items (1990 era) from Taobao. The smaller items I had sent via their consolidation/international shipping service and it was fine.One of the concerns is there are weird shipping restrictions on shipping electronics out of China. If you look at the info for the Taobao forwarding services they list some very vague restrictions on forwarding electronics. It was never an issue for my small items but they were low cost and so I could afford to lose them.For the larger items I purchased (~$800) I cooked a plan to have one of my coworkers who lives in China buy them for me and forward. Only to then find out China Post will not ship electronics out of the country, at least not from an individual. Obviously this is absurd as (prior to Trump jacking up UPU rates) half of AliExpress was shipped China Post. He ended up finding some guys who shipped them to Hong Kong at which point they had someone who worked for UPS who somehow managed to get them entered into the UPS system weighing 1/3 what they actually weighed. They repacked them into one box and there was alas some damage. I had to eat it.Apart from these items, which I had to haggle massively on (as list prices were stupidly high) I've really not found that used prices from China are that good. I find USA used sellers on eBay to be far cheaper.The issue is there are so many different ways to ship from China and so many different ways things can go wrong. So someone else's experiences may not be that useful. Also returning an item is usually not cost effective.

author: BeBuLamar
author_rank: Super Contributor
timestamp: December 26, 2022, 08:13:07 pm
content: HP had manufacturing in Singapore and perhaps people there could get their instruments for less. I do agree China and Singapore are big different.
Manual for Tektronix CDC250 universal counter - Page 1
Forum section: electronics / testgear

author: baldwin1974
author_rank: Newbie
timestamp: September 18, 2017, 06:29:43 pm
content: Does anyone have a copy of the manual/schematics for the Tektronix CDC250 universal/frequency counter? I just got one and it works although it needs some calibration; but, the power transformer gets a little warmer than I would like. Before doing too much investigating, it would be nice to have the manual....

author: rrm479
author_rank: Newbie
timestamp: January 10, 2018, 09:31:17 am
content: Hi,Look for BK precision 1823, not the "A" version, is the same equipment and you can find the manual with some calibration procedure.This equipment was built by Escort (I think) EUC3200.

author: jpwolfe31
author_rank: Contributor
timestamp: December 25, 2022, 05:53:41 pm
content: I was looking for one too, and found it here.https://w140.com/tekwiki/images/d/d5/070-7998-00.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: December 25, 2022, 06:01:54 pm
content: Aaaahhh the famous 7226 counter ic
Tektronix THS7xxx Scope Display datasheet - Page 1
Forum section: electronics / testgear

author: walter.aranda
author_rank: Contributor
timestamp: December 23, 2022, 10:42:53 pm
content: About the datasheet of the LM32P10 display of the Tektronix THS7XXX oscilloscope, on page 6, shouldn't it be like that?
Tektronix AWG2005 - Page 1
Forum section: electronics / testgear

author: nikodem
author_rank: Regular Contributor
timestamp: December 23, 2022, 08:33:54 pm
content: Hi All!I just bough this arbitrary generator, with repair in mind. It's DoA, most probably the PSU is dead (Yamanashi Kyosai Denki TE11), does anyone have any ideas how to tackle this?
RIGOL MSO5000 series waveform colour - Page 1
Forum section: electronics / testgear

author: sdev
author_rank: Newbie
timestamp: December 23, 2022, 12:57:35 pm
content: Dear All,This is first time I am using RIGOL MSO5000 series oscilloscope. Two issues. Channel 4 waveform is Blue which is not clear. And when using inverted image, it shows yellow in white background. Both cases it is difficult to see waveform. Also there are some lines when saving waveform in gray scale. Is there any work around for this.

author: Martin72
author_rank: Super Contributor
timestamp: December 23, 2022, 04:54:59 pm
content: Hi,Unfortunately, you can't change the colours like you can with the siglent(SDS2k+).Much worser is the fact that every math-trace got the same colour on the rigol...Would be a good idea to post it as a feature wish in the rigol 5000 feature thread.Martin

author: sdev
author_rank: Newbie
timestamp: December 23, 2022, 05:28:34 pm
content: Then what would be a reasonably good setting.. especially showing waveforms during presentation/ paper publication..

author: Martin72
author_rank: Super Contributor
timestamp: December 23, 2022, 06:47:14 pm
content: A little conversation about different trace colours, starting here:https://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-12bit-(published-for-chinese-domestic-market-only)/msg4550321/#msg4550321On the next side you can see a pic from a printed sheet with different trace colours...
sds2104X PLUS - Page 1
Forum section: electronics / testgear

author: Vulcan
author_rank: Newbie
timestamp: December 15, 2022, 12:10:51 am
content: This is my first post and getting back into the technical arena after a long career in telecommunication and IT management.I was wondering if anyone might have the Taligent SDS2104x Plus and tried to set up the network storage option. I have been unsuccessful in mounting a shared file on both Windows and on my Synology NAS. The scope indicates wrong arguments. The scope is being served by the DHCP server and I had already loaded the NI driver for my B&K signal generator. I have seen a bit of discussion around NFS and UNIX (that it works) yet nothing on any other operating systems. Does anyone have any possible solutions or ideas you are willing to share with a newcomer?As a backdrop, I am starting to focus on IOT and home automation so getting into the ESP32/ESP8266 MP's and a variety of devices to monitor and control a water storage and irrigation system, closed loop. I am a retired electronic engineer and trying to recapture my love of "hands-on" electronics.VE3KJN

author: JeremyC
author_rank: Regular Contributor
timestamp: December 15, 2022, 01:08:02 am
content: Quote from: Vulcan on December 15, 2022, 12:10:51 amBy default this scope use SMB1. You can force it to SMB3:https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-bugs-missing-features-feature-requests/msg3776087/#msg3776087

author: BillyO
author_rank: Super Contributor
timestamp: December 15, 2022, 01:56:24 am
content: Quote from: Vulcan on December 15, 2022, 12:10:51 amI assuming you mean the Siglent SDS2104X Plus. First, you have to use the IP address of the server with he share. The scope will not resolve the server by name.Next, as mentioned, you might have to enable SMB3 on the scope or enable SMB1 on the server you are attaching to (Windows or the NAS)Try the IP address of the NAS first, it may already respond to SMB1.

author: Slartibartfast
author_rank: Regular Contributor
timestamp: December 23, 2022, 12:50:57 pm
content: Quote from: BillyO on December 15, 2022, 01:56:24 amYeah, Taligent was a joint venture of Apple and IBM in the 1990ies. Funny to read a historic name here.QuoteDo NOT do that. SMB1 is a gaping security hole, that is fairly easy to exploit. It is so bad that even Microsoft, known for being obsessed with compatibility, removed support for SMB1 entirely from all versions of Windows several years ago. You may want to dismiss that on the grounds that the NAS is not accessible from the Internet, but if any other local PC catches a ransomware trojan, then you will find find everything on the NAS encrypted (and probably gone) as well as the stuff on the PC. Or some neighbour might hack your WLAN, with SMB1 he has easy and comprehensive access to the NAS.Use the trick described inhttps://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-bugs-missing-features-feature-requests/msg3776087/#msg3776087for access using SMB3. It works well.
delete - Page 1
Forum section: electronics / testgear

author: xavstar
author_rank: Newbie
timestamp: December 23, 2022, 01:08:46 am
content: -----

author: coromonadalix
author_rank: Super Contributor
timestamp: December 23, 2022, 12:10:55 pm
content: Send him an pm of how he did it, would have been nice to share it to the community ??
Cenco #82817-04 Decade Resistor - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: November 12, 2022, 02:28:34 am
content: Are these supposed to be any good?I saw one today at my "local" electronics re-cycling shop for $30 CDN. The switches feel awesome and it measured bang-on with my Brymen 786.They wouldn't let me "take it apaaart" so I don't know what the level of care was taken in manufacturing.Any one have more intimate experience with these?I guess at $30 ($23 US) I should just buy it for laughs and giggles. It doesn't say where it's made but externally it's built like a brick dunny.

author: BillyO
author_rank: Super Contributor
timestamp: November 13, 2022, 05:55:28 pm
content: I went out and bought it yesterday.As I said, externally it's fairly nice. Great case, big aluminum knobs and a very nice switch feel.Inside? Well it's not much to write home about.The resistors are 0.5% metal film. The switches don't look as good as they feel.I suspect the resistors are hand selected too as when I dialed up 2.345K I got 2.346, so not bad.It is worth the $23.

author: TLOliveira
author_rank: Newbie
timestamp: December 19, 2022, 10:01:41 pm
content: Hi Bill.Just wondering where is your local electronics re-cycling shop. I am looking for some place to find nice stuff, like this one.Tiago

author: TimFox
author_rank: Super Contributor
timestamp: December 19, 2022, 10:08:45 pm
content: Cenco, short for Central Scientific Co., is an old-line manufacturer dating back before 1900, now known as CSC Scientific.During my high-school education, their equipment was ubiquitous in school physics laboratories.Their current focus is on laboratory measurement equipment, rather than school lab equipment.

author: BillyO
author_rank: Super Contributor
timestamp: December 20, 2022, 02:43:40 pm
content: Quote from: TLOliveira on December 19, 2022, 10:01:41 pmThe EDI outlet in Orillia.s.buckley@ediinc.ca15 Progress Drive, Orillia, ON. L3V 0T7705.327.8691 Toll Free: 1.877.322.8968They advertise on eBay:https://www.ebay.ca/str/electronicdistributorsintlIf I see what I like I usually send an offer to Sean directly and then go pick-up in person. With me being in Muskoka, I don't have many other choices, but Sean is good to deal with.

author: TLOliveira
author_rank: Newbie
timestamp: December 22, 2022, 05:00:33 pm
content: Thanks for let me know.I'll check out their items on Ebay. Since I live in London, Orillia is a bit far from me.Tiago

author: elecdonia
author_rank: Frequent Contributor
timestamp: December 23, 2022, 12:24:17 am
content: Quote from: BillyO on November 13, 2022, 05:55:28 pmI have this ancient 6 decade resistance box:testgear/list-your-test-equipment-score-here!It is likely older than I am…But it still functions quite well.-E
HP Measuring System 5300B + 5302A + 5311B - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: December 21, 2022, 08:01:40 pm
content: Yesterday I scored this little beauty for $55CDN ($40US) along with another pretty minty Fluke 8050A for $35CDN ($25US).The fluke needs a CD4054 display driver to be 100% and then it will go to friend of mine.The HP Measuring System is fully working and will be staying with me. The 5302A counter is quite capable and will find use. The 5311B DAC, hmm, I'm sure I can think of a use for that even if it's just to pass some time. The thing that will probably be used the most is the OCXO built into the main unit as it has an external output. That alone was worth the price of admission.Neat little device. It can be broken down in seconds without tools and reconfigured to suit your needs. There are about a dozen modules available. Mostly counters of different kinds, but there is also a DMM, a battery, the DAC and a HPIB interface. The DAC, HIPIB and Battery modules are all "middle" modules so can be used together with the main unit (top) and one of the other modules, which are all "bottom" modules.Everything works 100% except the DAC wich is out by ~1%. It should be closer to 0.1%.I have manuals to cover the main unit and teh counter, but I can't locate a PDF for the DAC. I will take a shot at the calibration without the manual, but it would be really nice to have it. Does anyone have a link to one, or a scan lying around?
Lanyard for Hand Held Scope - Page 1
Forum section: electronics / testgear

author: MrAl
author_rank: Super Contributor
timestamp: December 23, 2022, 02:24:19 pm
content: Hello there,Recently i realized that my hand held scope could benefit from having a lanyard attached to it. I wondered why it and others like it did not have one.Thus i set out to make one for the scope, and i may make one for some of my other hand held devices too such as multimeters and the like.The scope i was talking about has a stand so that when you open the stand on the back the scope can sit up at an angle for easier viewing. The stand is not super strong but it's not exactly weak either. It also had two small slots right near the hinge of the back stand that allowed me to push a cord through one slot and run behind the stand and then through the other slot and up beyond the top of the scope body. Tying a knot in the loop of cord i now have a lanyard on the scope.This allows me to hang it up nicely or even hang it on my belt or perhaps a shoulder strap. I found this useful for storage, viewing, and when i have to take it on a trip to measure something. I'm going to make one for some of my other devices too.The kind of cord matters though. It has to be strong yet thin enough to fit through the slots or holes on the meter to be fit. The kind i used was 1/8 inch diameter cord made for use with parachutes. This is some strong stuff you cant break it with your hands no way.The only problem was getting it through the slots. The slots were narrow and i did not want to enlarge them. The cord did make it through though as i pushed it through with a very small screwdriver, but if it was any thicker i could see that not working at all. In that case there is another type of cord and also thread that is called "Dyneema" and it is very strong stuff even in a thread size. Even with the thread size i dont think you can break it with your bare hands. Of course it will also depend on the actual thickness. That kind of cord/rope/thread can be used to go through the holes/slots and then use a thicker cord to run through that loop and make a larger loop for hanging.I've used Dyneema thread for lanyards for thumb drives.You could also use steel wire or insulated stranded copper wire, but solid copper may not be as good.I have to highly recommend this, could prevent an accidental drop incident, and I'll post a pic of the scope with the lanyard if anyone is interested.I really think they should have holes in the devices just made for lanyards of some type.
SDM3055 won’t start up, stuck on Boot Screen again (help Tautech) - Page 1
Forum section: electronics / testgear

author: JimLev
author_rank: Contributor
timestamp: June 20, 2022, 06:17:43 pm
content: Last year I had the same problem, I got the patch and installed it. All was good until this morning, it won’t get past the boot screen.I called Siglent in Ohio, he sent me the same patch which I tried, it won’t install, never gets past the boot screen.I called Siglent again, looks like I’ll have to send it back for repair.Tautech, got any tricks up your sleeve that might get me up and running? I’ve got a lot of calibration to do for a customer.Thanks, JimLev

author: tautech
author_rank: Super Contributor
timestamp: June 20, 2022, 08:29:37 pm
content: Quote from: JimLev on June 20, 2022, 06:17:43 pmYep, send me PM.

author: ehughes
author_rank: Frequent Contributor
timestamp: December 01, 2022, 02:13:51 pm
content: I have a unit with the same issue.I can't seem to get ahold of Siglent for the recovery package. Would someone be kind enough to share the recovery package.?

author: tautech
author_rank: Super Contributor
timestamp: December 01, 2022, 07:20:29 pm
content: Quote from: ehughes on December 01, 2022, 02:13:51 pmIt is NOT for online sharing.PM sent.Guys, please get your SDM bench meters updated to the latest firmwares.https://int.siglent.com/download/firmwares/?CateIdss=5

author: e013041
author_rank: Newbie
timestamp: December 20, 2022, 08:25:39 pm
content: I just joined this illustrious club this morning. I was the first time I have turned on my SDM3055 this winter, and it is stuck on the boot screen. Serial #SDM305C1150064. Thanks in advance to anyone able to assist.

author: tautech
author_rank: Super Contributor
timestamp: December 20, 2022, 08:35:26 pm
content: Quote from: e013041 on December 20, 2022, 08:25:39 pmWelcome to the forum.SN# seems like a quite old unit, have you ever updated the firmware ?Send me PM with your email address and with luck we can recover it with our USB recovery tool.
ISKRA RESITIVE DECADE MA 2115 - Is it worth? - Page 1
Forum section: electronics / testgear

author: rvalente
author_rank: Frequent Contributor
timestamp: December 20, 2022, 04:40:05 pm
content: Hello Mates,I've been looking for a resistive decade for a while and I've came across a Iskra MA 2115 for 150USD, is it worth?Greetings!

author: BillyO
author_rank: Super Contributor
timestamp: December 20, 2022, 05:00:02 pm
content: It's nice, but it depends on your use case if it is worth it.Most people use a substitute resistor to put in circuit then dial in the value that works best, then specify an off the self resistor that gets the job done. If this is your use caseandyou have a really good DMM, then it's probably not worth it. Something like this:Might even work better.

author: 2N3055
author_rank: Super Contributor
timestamp: December 20, 2022, 07:34:40 pm
content: It is a good quality resistor substitution box. Not a precision decade..Still being made...https://www.tme.eu/en/details/metr-ma2115/decades/metrel/ma2115/Old and used 25-50 USD would be more realistic..

author: TimFox
author_rank: Super Contributor
timestamp: December 20, 2022, 08:21:20 pm
content: As generic terms, a "substitution box" contains a wide range of component values with reasonable tolerances.Such a box is useful when you don't know the appropriate value to use in a circuit and want to check over a wide range.A "decade box" contains tight-tolerance components arranged with decade switches, suitable for precision measurements or calibrations.A good decade box will be much more expensive than a substitution box.Both types are commonly available with either resistors or capacitors, less common for inductors.
Marconi Function Generator 2123 - Looking for info. - Page 1
Forum section: electronics / testgear

author: michalism
author_rank: Regular Contributor
timestamp: December 20, 2022, 09:25:25 am
content: Hello all.I'm trying to find the datasheet/ service manual for the above mentioned equipment.I bought it used last year, works fine as far as I can tell, but I'm interested to know more about it, and find its schematics.In all searches I did, I was not able to find absolutely no reference to it, so I thought to check here, just in caseThank you very much in advanceMichalis

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: December 20, 2022, 11:55:27 am
content: Maybe try this group:https://groups.io/g/Marconi-Test-Instruments/messages
HP8161A repair part 2 - Page 1
Forum section: electronics / testgear

author: fisafisa
author_rank: Regular Contributor
timestamp: December 18, 2022, 10:48:07 pm
content: Hi.I had bought a 8161A in bad shape as a fun project to learn more about old HP hardware.After some work I did manage to repair it and then it found his place in the collection of test equipment that get used quite rarely.Recently I tested it again and found out that the keyboard was completely stuck. No response.After a bit of digging into the SW I am now suspecting that the EPROM has begun degrading and the code inside is not anymore valid.Anybody with one such equipment willing to dump the EPROM code ?Maybe a 8160A would somewhat compatible.The EPROM is on a socket, so it is quite easy to pull it and dump the code.CheersFilippo
Waveforms on Fluke ESA612 Electrical Safety Analyzer - Page 1
Forum section: electronics / testgear

author: Roberts_Curiosity
author_rank: Contributor
timestamp: December 18, 2022, 06:06:15 pm
content: Question: Anyone know how to connect an oscilloscope to an ESA612 to prove its 10 Hz sine wave is working?Background:The Fluke ESA612 Electrical Safety Analyzer, is meant to test EKG/ECG monitors.One of its features is to output a 10 Hz sine waveform.Its documentation (https://www.flukebiomedical.com/sites/default/files/esa612_umeng0300.pdfathttps://www.flukebiomedical.com/products/biomedical-test-equipment/electrical-safety-analyzers/esa612-electrical-safety-analyzer) shows how to connect a patient monitor to the ESA612 to see this waveform.But, when I connect an oscilloscope to the connections, and set the ESA612 to 10 Hz (or any other waveform), all I get is 60Hz and high-frequency noise.This is a recently calibrated unit; so, I figure the error is likely my understanding of how to do this measurement.All advice and criticisms are welcome.Thanks, Bob
HP Spectrum Analyzer Option 130 Board - Page 1
Forum section: electronics / testgear

author: George_Race
author_rank: Regular Contributor
timestamp: September 30, 2015, 04:40:34 pm
content: Does anyone have for sale, or know where I might find an HP 08590-60352 option board for my HP 8595E Spectrum Analyzer.Thanks,George

author: kada
author_rank: Contributor
timestamp: October 08, 2015, 02:18:35 pm
content: I have one burned which I wanted to repair. It would be great if somebody can send me schematics or CLIP for this board. Thanks.

author: charlyd
author_rank: Frequent Contributor
timestamp: February 16, 2020, 08:38:20 am
content: any news about repair

author: ArjenCNX
author_rank: Contributor
timestamp: March 10, 2020, 09:21:50 am
content: maybe we can join forces to see if we can find any schematic on this PCB. i had a similar issue, the same board with a busted tantalum on it, full on fireworks, and the same error code, CAL: RES BW AMPL FAIL

author: nostril
author_rank: Newbie
timestamp: December 16, 2022, 08:38:22 am
content: I'll necro-post this since it's one of few results that shows on search engines for this board. Seeing as no-one has found the CLIP for it yet and there are so few photos of the board floating around on the internet, here is one I took of mine today.If it doesn't help anyone derive a schematic, maybe it will at least help someone identify component information. If anyone else shows decent progress beating me to deriving a schematic for the thing and needs the shield removed or any internal traces probed (4-layer board) let me know what you'd like probed/photoed and I can take a look.

author: nostril
author_rank: Newbie
timestamp: December 16, 2022, 08:39:29 am
content: Forgot to attach one of the underside.

author: nostril
author_rank: Newbie
timestamp: December 18, 2022, 02:32:46 am
content: I pulled the can off after all, since it was only soldered down with four posts. I'm building a BOM and schematic slowly and I'll open a separate topic if I succeed. For now I'll leave these last photos for anyone interested.
Agilent 53131 53132 18 GHz option - Page 1
Forum section: electronics / testgear

author: EE4all
author_rank: Regular Contributor
timestamp: December 16, 2022, 11:49:31 pm
content: It appears there are 2 different 18GHz options available from China based sellers on the auction site. Does anyone have experience with either one? I have a 53132 currently with no 3rd channel installed, and would like to add it.
Choice between 2 oscilloscope  - Page 1
Forum section: electronics / testgear

author: Alpha centauri
author_rank: Newbie
timestamp: December 16, 2022, 08:11:26 am
content: I'm an aspiring electronics engineer and about to purchase my first oscilloscope. I have 2 oscilloscope that my budget can cover but I can't seem to make a decision on which one of them will be the best for me. The first is the Siglent SDS2352X-E(350MHZ,$839,Not touchscreen,2 channel). The second is the Siglent SDS2104X plus(100MHZ,$999,Touchscreen, 4 channel).I mainly want to buy an oscilloscope to troubleshoot Audio amplifiers. If I eventually choose the 100MHz over the 350MHz oscilloscope, what range of analog electronics/type of circuit will I be limited to test/troubleshoot? Please, which one of the two scopes do you personally advice me to get? I would appreciate it if you guys would answer me. Thanks.

author: 2N3055
author_rank: Super Contributor
timestamp: December 16, 2022, 08:27:12 am
content: Quote from: Alpha centauri on December 16, 2022, 08:11:26 amIf you can afford it absolutely go with SDS2104X+. You will need 4 Ch more than BW, and it has signal gen in it that does Bode plots. It also have large touchscreen, 10 bit Hires mode etc.. It is more than one level up as a platform than SDS2352X-E. A stock SDS2104X+ has almost 200 Mhz BW anyways, and every single one can unlock 500MHZ BW with software unlock license. Read about this a bit.In short, SDS2104X+ is much better choice..

author: Alpha centauri
author_rank: Newbie
timestamp: December 16, 2022, 09:06:18 am
content: Quote from: 2N3055 on December 16, 2022, 08:27:12 am
HP 1661ES documentation - Page 1
Forum section: electronics / testgear

author: wwmartin
author_rank: Newbie
timestamp: December 15, 2022, 10:31:23 pm
content: Greetings & Merry Christmas!I'm searching for a few pages out of the service manual for the hp1661es, specifically the parts list & associated drawings of where the parts are located. I know it's a long shot, but I'd like to find a replacement for the plastic piece that wraps around the front of the sheet metal box, right behind the front panel...mine suffered a little damage in transit recently. Also, would like to know if there is a cmos backup battery in there that might want to be replaced, since I have no idea how old it might be. Any pointers appreciated, I already searched the list of sites on the HP/Agilent/Insight/name of the week web page.Thanks,Bill

author: DLJ
author_rank: Contributor
timestamp: December 16, 2022, 12:02:07 am
content: Hi Bill,You do not say where the damage to the bezel is, but on my logic analyzer the bezel snapped right through where the fxing screws are located.I 3d printed some splints that use longer screws to hold the broken pieces together. This has worked well for several years now.Just in case this is useful, I have attached the OpenSCAD file.RegardsDave

author: wwmartin
author_rank: Newbie
timestamp: December 16, 2022, 03:36:47 am
content: It took a hit on the right front corner, as viewed from the front. Fortunately it was wrapped in a plastic sheet, so I was able to capture most of the pieces, at least those big enough to see. It's not really terrible, I'm going to make an attempt to fuse the larger pieces together with plastic-melting solvent as a first try, then fill in the small gaps with epoxy. Pretty odd, and lucky, there is no sheet metal damage at all. Would you happen to know anything about the internals of this beast? I'm reluctant to open it up until I deal with the fractured plastic, it be easily made worse I think.Thanks,Billps: looks like all the 166x machines use the same enclosure & trim, perhaps there is a dead parts machine somewhere that might have intact trim?
Just bought the Siglent SDS1104X-E New off Amazon for $430. - Page 1
Forum section: electronics / testgear

author: JenniferG
author_rank: Frequent Contributor
timestamp: December 15, 2022, 11:13:10 pm
content: I did have camelcamelcamel.com set to notify me when the price dropped down to $399, like it was a few weeks back, but I just noticed today Amazon dropped it down to $430, and I figured that was close enough -- I mean it could go back up a little from here, for a long while.. who knows?Got it for $467 including 8.517% state sales tax; but I purchased it with a 5% cashback Amazon Prime card, so I'll have $23 coming back -- so all-in-all it's costing me $444. (I pay my credit card balances off in full each month to avoid any interest.)Here's the link:https://www.amazon.com/gp/product/B0771N1ZF9
Frequency Counter 2Ero Selection - Page 1
Forum section: electronics / testgear

author: ko4nrbs
author_rank: Regular Contributor
timestamp: December 15, 2022, 03:23:31 pm
content: My counter works very well to monitor my old Heathkit HG-10 VFO but when powered down I have to always select2Erobefore it will start accurately displaying the frequency. Is there any way to permanently select2Eroso I don't have to select it every time?Thank you,Billhttps://usa.banggood.com/1Hz-50MHz-High-Sensitivity-Frequency-Meter-Counter-Measurement-Tester-Module-7V-9V-50mA-p-1662557.html?cur_warehouse=CN

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 15, 2022, 04:40:41 pm
content: I have no idea what 2Ero means and it looks like I'm not the only one.

author: ko4nrbs
author_rank: Regular Contributor
timestamp: December 15, 2022, 07:24:04 pm
content: It is one of the selections on the PCB via a push button.It's shown on this site at the end of the page.https://kc7zow.tripod.com/hamradio/id6.htmlBill

author: AVGresponding
author_rank: Super Contributor
timestamp: December 15, 2022, 07:47:27 pm
content: Presumably it means "zero" and is to reset the counter?

author: electr_peter
author_rank: Unknown
timestamp: December 15, 2022, 07:55:22 pm
content: Quote from: AVGresponding on December 15, 2022, 07:47:27 pmYes. OP meant "Zero" option displayed on 7-segment display.
NEW MOTOROLA Communications System Analyzer group - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: December 17, 2022, 01:00:03 pm
content: A new group was started just for Motorola Comm System Analyzers. It has over 100 documents, schematics, manuals…. I encourage anyone that has a Motorola Communications System Analyzer to take a look at the files section.https://groups.io/g/MotorolaCSA
Rigol DS1202z-e Any way to unlock CAN bus decoder? - Page 1
Forum section: electronics / testgear

author: ivi_yak
author_rank: Regular Contributor
timestamp: December 14, 2022, 09:32:38 pm
content: Rigol DS1202z-eIs Any way to unlock the CAN bus decoder?https://rigol.com.ua/en/products/digital-oscilloscope-rigol-ds1202z-e/

author: tautech
author_rank: Super Contributor
timestamp: December 14, 2022, 10:08:43 pm
content: Quote from: ivi_yak on December 14, 2022, 09:32:38 pmLooking at the datasheet there is no CAN support so nothing you can unlock.Decoding Type: Parallel, RS232/UART, I2C, SPI

author: ivi_yak
author_rank: Regular Contributor
timestamp: December 15, 2022, 02:42:15 pm
content: I thought it could be added as a purchasable option
Why couldn't 'scopes autodetect for probes using their own 1kHz calibrators? - Page 1
Forum section: electronics / testgear

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: December 15, 2022, 11:41:47 am
content: High(er) end 'scopes use fancy expensive and often proprietary BNC ends to allow autodetection of times X probes.I hope this isn't a stupid question but, within reason, why could a scope not detect the times range of a probe if the user momentarily connected it to the calibration terminal? The 'scope must know what amplitude the calibrator output is, so it can therefore detect the multiplier (divider...).

author: xrunner
author_rank: Super Contributor
timestamp: December 15, 2022, 11:49:21 am
content: Could be done but it wouldn't gain much. You'd have to tell the scope when you were looking at the cal signal (instead of whatever else you were looking at) and then to adjust itself accordingly. So that would mean a menu selection. So same thing as going to a menu and telling the scope you want it to adjust reading for a 10X probe.