hybridfree/eevblog-posts huggingface dataset:
HP 3325A Vs HP 8165A - Page 1
Forum section: electronics / testgear

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: May 28, 2020, 11:52:07 am
content: Which one do I keep?Is there any special reason the 3325 commands a higher price?Both work quite well, the 3325 puts out 10 MHz square while the 8165 goes to 50 MHz square, among other differences.3325 has the OCXO which is pretty stable. No such option on the 8165.Wally

author: wn1fju
author_rank: Frequent Contributor
timestamp: May 28, 2020, 12:53:21 pm
content: Why not keep both?I have both the 3325A and 8165A. The biggest difference in my mind is the precision of the settings (particularly frequency). Many more digits at your disposal on the 3325A (or the later 3325B). I also found the calibration procedure much more difficult on the 8165A. HP (Germany) called it a programmable signal source rather than a function generator - I think that is a fair characterization. On the other hand, I've always been mad at HP for calling the 3325A a 21 MHz function generator and then restricting some of the waveforms to ~10 kHz. Sounds like false advertising!As far as prices go, at least on eBay (USA) both units can be had for under $100 with careful shopping (and waiting perhaps), especially if you are willing to fix one. I've found that sometimes the 8165A can go for very little since people don't seem to know what they are. I think I paid $50 for mine. I haven't noticed that the 3325A necessarily commands a higher price than the 8165A in general.

author: HalFoster
author_rank: Frequent Contributor
timestamp: May 28, 2020, 03:28:44 pm
content: The largest difference is that the 3325A is much more precise than the 8165A - it's frequency, amplitude and phase noise specifications are much better, while the 8165A has a larger frequency range. As so much does, it comes to what you will be using it for and your specific needs. If you are only looking for a sine output, the HP 3335A really can't be beat for the money. Or, what has become my daily driver for low frequencies, the HP 3326A - more or less two 3325A's in one box with a lot of extra capabilities thrown in. Along with a HP 8663A, there is not much I can't do with the pair.Hal

author: gdnichols31
author_rank: Regular Contributor
timestamp: January 12, 2023, 01:36:31 am
content: I have both of these instruments also.I just bought the 8165A. I bought it specifically for the burst setting. You can set the frequency and the number of cycles, and then trigger it. It will generate that number of cycles and quit.I love it.Gary
Keithley 2400 Error 601 and couple of questions - Page 1
Forum section: electronics / testgear

author: analogRF
author_rank: Super Contributor
timestamp: April 23, 2021, 01:10:14 pm
content: We have a Keithley 2400 here in our university lab that briefly shows Error 601 at startupThe lithium battery is dead (0.2V) and it is soldered to the board but I will replace it. However I have two questions:1-are the calibration constants lost and the unit definitely needs calibration now?I am confused by the service manial because somewhere on page 4-8 it says:"...The RAM is battery backed-up, providingcontinued storage of data buffer information during power-down cycles. All calibrationconstants and system setups are stored in a separate serial EEPROM."but then on page 4-12 it says:"...Calibration constants and user-defined parameters will be lost when the battery isreplaced. The Model 2400 must be re-calibrated..."so which one is it? Are they in EEPROM or NVRAM?2-The best DMM I have available is a new DMM6500. Can I do the calibration using this DMM or I definitely need a 3458A?thanks for your help

author: msimunic
author_rank: Contributor
timestamp: January 11, 2023, 09:58:28 am
content: I have same question.

author: TheSteve
author_rank: Unknown
timestamp: January 11, 2023, 04:10:48 pm
content: If the battery is already dead there is really no need to worry, if anything is going to be lost, it is already lost. In the case of the 2400 the cal data should be an eeprom anyway. It is just clock and user config/data and held in ram.
R&S FSEM won`t boot realtime OS - Page 1
Forum section: electronics / testgear

author: Gunnar-K
author_rank: Newbie
timestamp: January 11, 2023, 10:08:44 am
content: Hi! See attached image. The booting process stops at this point. So far I have taken the HDD out, and tested it on a PC with some standard HDD test software (don`t remember which..) in a PATA to USB converter. Software didn`t find anything wrong with the disk. R&S could not offer service on this instrument, or trouble shooting help. Maybe someone here can suggest how to proceed? As far as I know, the instrument have not been dismantled before. I read in another post here that someone replaced a battery on a CPU-board? Maybe there is a battery in this instrument as well?
Here is the volume two of the Tektronix book - Page 1
Forum section: electronics / testgear

author: Gianni
author_rank: Contributor
timestamp: January 11, 2023, 02:54:31 am
content: As promised, here is the second volume of the history, covering the 11000 series and two HP models.You can download it from my usual web page (http://www.k100.biz/parade.htm) or from Internet Archive (just go there and search “Tektronix Becattini”).As always, any suggestion (or correction) is welcome.Enjoy!
What is a R&S CMS 56? - Page 1
Forum section: electronics / testgear

author: ap
author_rank: Frequent Contributor
timestamp: January 10, 2023, 05:54:42 pm
content: While there is quite some data available for the Rohde&Schwarz CMS 50 and 54, I have not found anything about the CMS 56 which I came accross recently. Is this maybe a custom version of the CMS54?Many thanks in advance for any hint.
Panasonic VP-3620A Logic Analyser service manual + teardown - Page 1
Forum section: electronics / testgear

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 08, 2023, 12:44:28 am
content: Due to limits per post, additional pictures will come day by day.Summary of internals:CPU is an 8085 (which corresponds to one of my most likely predictions)No gate arrays or other custom ICs including for acquisition and video (which I predicted might be present but fortunately not) but high speed 74S logic has been used without any BPROMs (or programmable logic) and the power supply has an unused -2V output for ECL termination - I also predicted that ECL devices might be present but are notAll ICs were available off the shelf including ICs on an epoxy dipped control module on the power supply and can be second source (I found that the NEC 7210 is an enhanced 8274 and the two epoxy dipped ICs are MB3759/TL494)CPU ROM/RAM size is 28/12 KByte respectively (which was way below my prediction of 128-256 KBytes of ROM); Display RAM card has 16 KBytes of SRAM, Memory card has 4 KBytes of acquisition SRAM (a total of eight 1 Kbit * 4 devices for the 32 fitted channels), Option Interface card has 8 KBytes of SRAM and fitted option cards (u-CPU and RS-232-C Analyser) each have 8 KBytes of ROMGPIB/RS-232/printer interface options might have been availableOscillators are 6.144 MHz for the CPU running at half frequency and for baud rate generation, 8.8 MHz for video and 20 MHz for logic timing measurementDisplay RAM board (which has discrete logic for the video controller) has provision for a 8251 RS-232 controller and 75188/75189 line drivers/receivers with an arrangement of 74LS90+74LS393 clocked by the 6.144 MHz CPU oscillator for selecting the baud rate for the 8251 serial controller via a bank of DIP switches (the unmounted 74LS90/74LS393/8251 devices were identified by checking the pin configurations against three vintage data books)For a high state, unused inputs on the TTL ICs are floating, but is generally not permissible for (C)MOS devices which do not have an internal pullup/pulldown resistor which can be programmable in certain devicesu-CPU card (which can perform program disassembly for a specific CPU based on bit width and the card ROM program) has 1 KByte of SRAM for units built for an 8 bit CPU and double (U17/U18 are the same as U15/U16 with U7 being the same as U5) for 16 bitFor a unit from the early to mid-80s, 20 MHz/32 channel/1024 samples would be considered an entry-level unit - I am after schematics for the VP-3620A.

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 09, 2023, 12:16:15 am
content: One more set of photos to go...

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 10, 2023, 12:17:25 am
content: The final set of photos...
CWS 500C programing - Page 1
Forum section: electronics / testgear

author: b.ranhel
author_rank: Newbie
timestamp: January 09, 2023, 05:03:43 pm
content: Is there anyone that as, knows or can do a visa log for the GPIB commands for the EM TEST CWS500C?The old one!I have one but don't have the EM Test software so i can probe with NI Trace, and i wanted to use it as a generator and not for EMC testing!!
MSOX6004A sample rate, memory depth and SCPI - Page 1
Forum section: electronics / testgear

author: metebalci
author_rank: Frequent Contributor
timestamp: January 09, 2023, 03:02:38 pm
content: I am trying to automate capturing something with MSOX6004A and sending commands over socket (5025). I am using channels 1 and 2 (and what I am asking is also valid if I use all four as expected). So the scope has max sample rate is 10GSa/s and memory depth is 2Mpts when all channels are used. So if I calculate this correct, using 200us/div, makes a capture of 2ms, and it should run at 1GSa/s at this division, and I can confirm it works like that when I use the scope manually. But when I initialize everything (starting with *RST) and do a SINGLE or DIGITIZE with SCPI commands, it says the sample rate is 500MSa/s. At this point without changing anything if I press SINGLE button on the scope, then it captures with 1GSa/s as I expect. What could I be missing with SCPI commands affecting this ?Mete
allmax+ programmer - Page 1
Forum section: electronics / testgear

author: milesvile
author_rank: Newbie
timestamp: January 03, 2023, 10:53:49 am
content: Hello everyone and I wish you a Happy New Year and much success in your work.I have owned the ALLMAX+ programmer from EEtools for years, but due to the damage of the disk of my old PC, I lost the software. I love that long-standing tool very much, so I would like to ask for help. I need software for MS-DOS or WINDOWS to run it. Of course, good some kind of documentation would also come. I have a PC with MS-DOS and LPT on the board. Any help would be welcome. Thank you.

author: joeqsmith
author_rank: Super Contributor
timestamp: January 03, 2023, 01:20:24 pm
content: This thread demonstrates my programmer running with more modern PC.https://www.eevblog.com/forum/chat/printer-ports-for-the-modern-pc/msg1038631/#msg1038631I had hacked the software to support the different printer port. I also hacked it to support an 8051 and a different E^2 device. I believe the attached is the last version EETOOLs released, no hacks. Empnt is a third party driver I used to work around the direct I/O calls when NT was released. I also attached the documents I had for it that may no longer be available.Again, this programmer was damaged during a lightning strike and because no details about the design were released and it uses PALs, I recycled it.Good luck with your programmer.

author: joeqsmith
author_rank: Super Contributor
timestamp: January 08, 2023, 06:28:23 am
content: After digging out the old discs and uploading them, I wanted to say thank you for reaching out to me in a PM and asking me to spend my time helping you. I assume you got it all working or I would have received more PMs asking for additional help.As mentioned, poor etiquette and entitlement are the norm.
New edition 4 of my Tektronix book - Page 1
Forum section: electronics / testgear

author: Gianni
author_rank: Contributor
timestamp: January 07, 2023, 02:30:02 pm
content: Hi Friends,I wish to inform you that the new fourth edition of my free book is now available. Many things have been added, from the 7704, to a deep analysis of the High Efficiency power supply of the 78/79 series. The pages passed from 360 to 580. Among them, I hope you will find interesting the digital transformation of a Tektronix photo camera.You can download it from the usual my web page (http://www.k100.biz/parade.htm) or from Internet Archives (just go there and search “Tektronix Becattini”).The pages were getting too high in number, so I started a second volume that I hope I release in days. It covers the first 11000 series and some HP oscilloscopes.As always, any suggestion (or correction) is welcome.Hope enjoy.

author: danils
author_rank: Contributor
timestamp: January 07, 2023, 08:23:19 pm
content: Hello Gianni,I absolutely love it. Congratulations!Is a printed hardcover edition available?ThanksDaniele

author: mawyatt
author_rank: Super Contributor
timestamp: January 08, 2023, 03:22:16 am
content: Wonderful trip down memory lane, thanks so much for all the effort and great publicationBest,
TESTER TC-1 - Page 1
Forum section: electronics / testgear

author: lionelkjh
author_rank: Frequent Contributor
timestamp: January 03, 2023, 05:24:26 pm
content: Goodnight all! I'm looking for the chinese tester TC-1 usb charging cord (photo); can someone help me find it?? Thanks in advance!

author: mendip_discovery
author_rank: Super Contributor
timestamp: January 03, 2023, 07:52:20 pm
content: Photo of the connector would help though asking in the metrology section wont help you much.

author: GraemeG
author_rank: Contributor
timestamp: January 03, 2023, 11:58:05 pm
content: I have one of these testers and mine uses a standard micro USB connector as used on many, many devices. Most of us have 10 or 20 of these cables lying around the house! Any USB charger will work or even plug it into your PC.

author: elecdonia
author_rank: Frequent Contributor
timestamp: January 04, 2023, 08:17:59 pm
content: Recently manufactured LCR-TC1 units may have USB-C jacks. Older units micro-USB. These are totally standard jacks and cables. Any USB charger will work. I often use older chargers that aren’t powerful enough to charge today’s mobile phones. But devices like the LCR-TC1 don’t demand very much power from the charger. Any USB charger will work with them.

author: orb
author_rank: Regular Contributor
timestamp: January 05, 2023, 12:32:05 am
content: I use "LCR-T7H" and it has standard micro usb. It's newer than TC1. TC2 is the most recent.T7H draws max ~0.4A from the 5V charger.

author: elecdonia
author_rank: Frequent Contributor
timestamp: January 05, 2023, 04:36:50 am
content: Quote from: orb on January 05, 2023, 12:32:05 amWhat does your LCR-T7H display on the screen at power-up? Does it give any info about its software version?

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 05, 2023, 03:21:13 pm
content: its normal smartphone microUSB cable... i butchered my TC1 to accept 18650, so no more cable and degraded/dead internal battery.

author: orb
author_rank: Regular Contributor
timestamp: January 07, 2023, 07:05:18 pm
content: Quote from: elecdonia on January 05, 2023, 04:36:50 amYes, it shows version v1.1, like on the photo below.

author: elecdonia
author_rank: Frequent Contributor
timestamp: January 08, 2023, 01:10:19 am
content: May we please see a photo of its PC board? Thanks in advance.
Sencore LC103 manual needed - Page 1
Forum section: electronics / testgear

author: HighVoltage
author_rank: Super Contributor
timestamp: July 30, 2019, 12:14:21 pm
content: I am looking for theuser manualandservice manualof a Sencore LC103 capacitor and inductor tester.All online searches lead to stupid ebooksThanks for any help.

author: commongrounder
author_rank: Frequent Contributor
timestamp: July 30, 2019, 07:55:55 pm
content: Service manual PDF can be found in the Audio Karma Database PDF Gallery. Google search took me there.

author: HighVoltage
author_rank: Super Contributor
timestamp: July 30, 2019, 10:35:10 pm
content: Thank you commongrounderThose are very good schematics of the LC103 on the Audio Karma Database.But unfortunately not the manuals, still looking.Its amazing, how many dead ends I am finding through google

author: Stray Electron
author_rank: Super Contributor
timestamp: July 30, 2019, 11:50:41 pm
content: Google search returns so many TRASH sites anymore that it's almost worthless.

author: coromonadalix
author_rank: Super Contributor
timestamp: July 31, 2019, 02:56:31 am
content: When Sencore died, many peoples where left without ressources ...... good luck finding something for the "resolver", its a great lcr

author: HighVoltage
author_rank: Super Contributor
timestamp: July 31, 2019, 08:15:44 am
content: Quote from: Stray Electron on July 30, 2019, 11:50:41 pmIts unreal, how many of these trash links have the name of this manual in there link.What is the purpose of such?It is a very unlikely that someone will look for this manual, why creating the effort to do such a bad thing.Well, I will keep looking....

author: coromonadalix
author_rank: Super Contributor
timestamp: July 31, 2019, 08:39:58 am
content: pm'd you

author: HighVoltage
author_rank: Super Contributor
timestamp: July 31, 2019, 09:44:28 am
content: I talked to someone at Sencore by phone and found a nice guy who is willing to help.May be I get lucky.Thanks for all your help so far.

author: ITArchitect
author_rank: Contributor
timestamp: January 07, 2023, 06:02:33 pm
content: Looking for a Sencore LC103 Service Manual. They no longer appear in the AudioKarma Database. Wondering if someone in the group has a copy.

author: iet
author_rank: Frequent Contributor
timestamp: January 07, 2023, 06:42:59 pm
content: LC102.http://manuals.repeater-builder.com/te-files/SENCORE/SENCORE%20LC102%20Operation.pdf

author: ITArchitect
author_rank: Contributor
timestamp: January 07, 2023, 06:49:35 pm
content: Thanks, that's the operations manual. I'm looking for the service manual which would include schematics etc.

author: mr.fabe
author_rank: Regular Contributor
timestamp: January 07, 2023, 07:08:21 pm
content: Here are the LC103 schematics.I haven't located a service manual or parts list so be sure to post it here if you find them

author: ITArchitect
author_rank: Contributor
timestamp: January 07, 2023, 07:19:00 pm
content: Thanks for the schematics! If I find a service manual and or parts list, I will post it here. Thanks again!
Nicolet 310 Oscilloscope - Page 1
Forum section: electronics / testgear

author: PeaceFrogger
author_rank: Newbie
timestamp: January 07, 2023, 04:17:46 am
content: I just got this oscilloscope. Does anyone know where i can download the manual. I checked all the threads I can find and all the links but can't seem to find the manual.

author: BillyO
author_rank: Super Contributor
timestamp: January 07, 2023, 05:29:08 pm
content: Looks like there is one on eBay right now:https://www.ebay.com/itm/394213237858
EEVblog BM786 Multimeter - no resistance reading above ~1k? - Page 1
Forum section: electronics / testgear

author: gnasirator
author_rank: Contributor
timestamp: December 28, 2022, 12:23:37 pm
content: Hi all,I just recently got me the otherwise great EEVblog meter but now while I was tinkering away I noticed something really odd:The meter always shows 'OL' when I try to measure resistors > ~1k. I've managed to correctly measure up to 600 Ohms so far but all greater values don't show a value. Has anyone else experienced this?My firmware version is 78607 and if I set the meter to diode mode and measure the resistors, I do in fact get a voltage reading that somewhat scales with the resistance.So what could it be? Has anyone experienced a similar thing? What can I do to resolve this issue?Dave, do you support these meters in any way? I'm happy to set an alarm to midnight and demonstrate via Zoom/Skype to you (living in Germany)

author: nomead
author_rank: Contributor
timestamp: December 28, 2022, 02:08:22 pm
content: Sounds like your meter is stuck on 600 ohm range.Do you have autoranging enabled i.e "AUTO" indicator on display?

author: Fungus
author_rank: Super Contributor
timestamp: December 28, 2022, 03:01:59 pm
content: Quote from: gnasirator on December 28, 2022, 12:23:37 pm600 Ohms max on a 60000 count meter? Sounds like somebody disabled auto-ranging...(try turning it off and on again)

author: gnasirator
author_rank: Contributor
timestamp: January 07, 2023, 10:09:53 am
content: Thanks. Issue solved! Auto was indeed off. I shouldve maybe read the manual instead of randomly pressing buttons after unboxing it…
Rigol DL3000 series DC load hack? - Page 1
Forum section: electronics / testgear

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: July 04, 2019, 09:26:35 pm
content: I'd like to purchase the DL3031A however it seems a bit overpriced relative to the 500$ of the entry level model.My question is, since most Rigol products can be hacked through firmware to the next model up, do these loads follow the same principle?Has anyone successfully attempted this? What models can be hacked into which ones?I'd rather not spend 1.5k $ if I don't need to.

author: tv84
author_rank: Super Contributor
timestamp: July 04, 2019, 09:38:55 pm
content: Search is your friend!https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2328576/#msg2328576

author: drummerdimitri
author_rank: Frequent Contributor
timestamp: July 04, 2019, 09:48:38 pm
content: Quote from: tv84 on July 04, 2019, 09:38:55 pmIt is!I see the DL3021 can be hacked into the DL3021A. I know there are some missing components to go from a DL3021 to a DL3031A but has anyone done it? If not, should I just get the DL3031 and hack it into the DL3031A?

author: ben_r_
author_rank: Frequent Contributor
timestamp: January 07, 2023, 04:50:38 am
content: Yes you absolutely should! And hopefully you did!
What to look for in a differential probe? - Page 1
Forum section: electronics / testgear

author: nightfire
author_rank: Frequent Contributor
timestamp: December 31, 2022, 09:12:53 pm
content: As I will work a bit deeper in power supplies in the near future, I want to have a differential probe (or two...) for my scope.As I am about to begin to dip my toes in the water in this regard, I do not want to spend a fortune (or more money on a probe than on my scope).From what I have read, the micsig line of differential probes is some sort of secret tip amongst those kind of probes- priced at around 200something Euros, thats a good starting point, when other probes from Hameg used on ebay are sometimes more expensive. And other companies that are available through german reselllers sometimes begin at 500€.So certainly there is a difference between those probes, but apart from some datasheets, which things do I have to look out for?Basically I want to do some probing around mains voltages in powersupplies and lighting fixtures. So I have 230VAC here in Europe, which means around 700V peak-to-peak is needed.The DP10007 seems to be the best value in the range I want to work, sadly being out of stock with most suppliers actually.http://micsig.com/Differential%20Probe04/

author: TheDefpom
author_rank: Frequent Contributor
timestamp: December 31, 2022, 09:59:09 pm
content: There is a new probe from Migsig, I dont know if you have looked at it yet, the DP750.http://micsig.com/Differential%20Probe01/

author: nightfire
author_rank: Frequent Contributor
timestamp: January 05, 2023, 10:23:56 pm
content: Thank you! From the specs it looks like it has better CMRR, but different connection/cabling.I would be curious if anyone has had the ability to get some real hands-on experience yet?
Has anyone revised this RIGOL knockoff?  - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: January 06, 2023, 02:16:57 pm
content: Just seen this today, tell me this isn’t a knockoff they didn’t even change the model number.https://www.ebay.com/itm/115145210763?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=GjwaCphyTzO&sssrc=2349624&ssuid=UwQPf6z1QqK&var=&widget_ver=artemis&media=COPY

author: wraper
author_rank: Unknown
timestamp: January 06, 2023, 02:25:02 pm
content: It's a different device. Even though front panel has similar layout, it's has significant differences and back side is completely different.

author: simba15
author_rank: Regular Contributor
timestamp: January 06, 2023, 02:35:22 pm
content: Wow quite the price difference.Curious to know the exact differences.

author: Kosmic
author_rank: Super Contributor
timestamp: January 06, 2023, 03:45:33 pm
content: Quote from: Crambone on January 06, 2023, 02:16:57 pmLook like a rebranded Owon XSA815TG.

author: Crambone
author_rank: Frequent Contributor
timestamp: January 06, 2023, 07:46:50 pm
content: Found the following on it.

author: simba15
author_rank: Regular Contributor
timestamp: January 06, 2023, 09:09:08 pm
content: Yes very close to the OWON.And I found the Rigol for the same $999 so better just go with that.

author: Crambone
author_rank: Frequent Contributor
timestamp: January 06, 2023, 09:46:52 pm
content: I agree but the 10MHz ref in is a nice touch on a cheap model.Would love to put that thing to the test for fun I doubt it meets the specs it posts

author: tautech
author_rank: Super Contributor
timestamp: January 06, 2023, 10:18:18 pm
content: Quote from: Crambone on January 06, 2023, 09:46:52 pmStandard fare for most SA's.

author: Crambone
author_rank: Frequent Contributor
timestamp: January 06, 2023, 11:07:01 pm
content: Agree
Unaohm EP760S+EP876A service manual + teardown - Page 1
Forum section: electronics / testgear

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 03, 2023, 05:38:02 am
content: Due to limits per post, additional pictures will come day by day.Do you know where I can find a service manual and schematics for a Unaohm EP760S TV signal meter including the EP876A satellite converter option?

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 04, 2023, 12:47:34 am
content: Two more sets of pictures to go...

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 05, 2023, 12:29:42 am
content: One more set of pictures to go...

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: January 06, 2023, 12:17:07 am
content: The final set of pictures...
Playing with the Bodnar Pulser - Page 1
Forum section: electronics / testgear

author: BillyO
author_rank: Super Contributor
timestamp: January 05, 2023, 04:38:45 pm
content: The mailman (finally - it only took a month between the UK and Canada!) delivered my Bodnar pulser yesterday afternoon and I had some fun using it to look at rise times on some of my scopes.For each of the Siglent scopes I used the internal measurement and using cursors. I find that with some signals the cursor method is more accurate. However, this thing produces a pretty good square wave so keeping a couple of cycles in the sample should allow the scope to make decent measurements.For the "improved" SDS1104X-E I got 1.67ns via internal measurement and 1.72ns via cursors. Not bad for a $500 unit. Note the little rise drung the top of the square wave. This does not happen with signals that have slower rise times.For the "improved" SDS2104XP I got 686ps on internal and 660ps using the cursors. The little bit of jitter on the pulser made the cursor measurement a little vague.And just for fun I tried it on the under appreciated Hantek 6074BC with a single channel enabled and got 1.60ns! How is it Hantek can make a pretty reasonable USB scope then fail so hard making standalone scopes?Edit -For some reason I can't add the screen shot for the Hantek. I get a "Your attachment has failed security checks".Okay, figured it out. it has an unusual jpeg format. Fixed it...
Vintage TEK 11302 and Tekcats software - Page 1
Forum section: electronics / testgear

author: Sandy22
author_rank: Newbie
timestamp: January 02, 2023, 03:01:12 pm
content: Hello,i want to calibrate my old TEK 11302 (Firmware 2.4) with the latest TEKCATS software 2.19.I got a message, that this TEKCATS version does not support this firmware version, only Ver 2.5 or later.In cannot get any later Firmware for the 11302 and also no older TEKCATS Version...I am strandedIs there someone with any matching files?regardsAndreas

author: calibrationfixture
author_rank: Regular Contributor
timestamp: January 02, 2023, 03:58:30 pm
content: Hi,I suggest the owner of this website:http://www.hakanh.com/dl/kits.htmSucces,Calibrationfixture

author: Sandy22
author_rank: Newbie
timestamp: January 03, 2023, 08:33:40 pm
content: Later Firmware needs hardware upgrade (unavailable today)So what i need is an older version of TEKCATS that supports 2.4 FW....Hard to find....

author: calibrationfixture
author_rank: Regular Contributor
timestamp: January 04, 2023, 05:58:42 pm
content: Hi,Thus the owner of that website can't help you with older TEKCATS Software?You can also try:https://groups.io/g/TekScopesBefore asking something on the Forum, you must become a Member first.You can search into the Posts as outsider.Succes,Calibrationfixture

author: Sandy22
author_rank: Newbie
timestamp: January 04, 2023, 07:42:00 pm
content: The owner of the wbsite gave me some useful information , but he cannot offer older Tekcats Versions.And....no answers in the Tek forum.Andreas
Heathkit SO-4554 Oscilloscope Manual - Page 1
Forum section: electronics / testgear

author: Omega Glory
author_rank: Regular Contributor
timestamp: January 05, 2023, 01:35:50 pm
content: Years ago I purchased my first oscilloscope on Ebay, a Heathkit SO-4554 dual channel 40Mhz scope. For the most part it works wonderfully, but it could use some tuning up. Does anyone happen to have a copy of the service manual for it? The user manual would also be nice, so see exactly how the curve tracer mode is supposed to function.
Sig 1104X-E what am i doing wrong - Page 1
Forum section: electronics / testgear

author: bobberCHOP
author_rank: Newbie
timestamp: January 04, 2023, 08:52:54 pm
content: Hello all newbie here. befrore <-----J/k Before I ask my question be forewarned my spelling grammar and memory suck, sooooo;)I am new to code, Python, and the 1104 is my 1st scope, so be easy on me PLZ!!Anywho, I managed to increase my BW to 200, but I have had no luck with any other options. I even tried removing scopeid from script with no success. What am I doing wrong here??? I have tried both SCPI and manually, been at this for days now, and goin bonkers. Any idears??? I can post a snap of the script if that would help?? Thank you in advance !!

author: tautech
author_rank: Super Contributor
timestamp: January 04, 2023, 08:58:58 pm
content: Quote from: bobberCHOP on January 04, 2023, 08:52:54 pmWelcome to the forum.Try the SN#.

author: bobberCHOP
author_rank: Newbie
timestamp: January 04, 2023, 10:21:22 pm
content: Quote from: tautech on January 04, 2023, 08:58:58 pmThank you for the welcome!!!!I did that with no success. It did make the return list shorter.------------------------------------------------------------------------------------import hashlibSCOPEID = '00246c44xxxx'SN = 'SDSMMGKCxxxxxx'Model = 'SDS1000X-E'bwopt = ('25M', '40M', '50M', '60M', '70M', '100M', '150M', '200M','250M', '300M', '350M', '500M', '750M', '1000M', 'MAX')otheropt = ('AWG', 'WIFI', 'MSO', 'FLX','CFD', 'I2S', '1553', 'FG', '16LA')hashkey = '5zao9lyua01pp7hjzm3orcq90mds63z6zi5kv7vmv3ih981vlwn06txnjdtas3u2wa8msx61i12ueh14t7kqwsfskg032nhyuy1d9vv2wm925rd18kih9xhkyilobbgy'def gen(x):h = hashlib.md5((hashkey +(Model+'\n').ljust(32, '\x00') +opt.ljust(5, '\x00') +2*(((SCOPEID if opt in bwopt else SN) + '\n').ljust(32, '\x00')) +'\x00'*16).encode('ascii')).digest()key = ''for b in h:if (b <= 0x2F or b > 0x39) and (b <= 0x60 or b > 0x7A):m = b % 0x24b = m + (0x57 if m > 9 else 0x30)if b == 0x30:b = 0x32if b == 0x31:b = 0x33if b == 0x6c:b = 0x6dif b == 0x6f:b = 0x70key += chr(b)return key.upper()for opt in bwopt:print('{:5} {}'.format(opt, gen(SCOPEID)))for opt in otheropt:print('{:5} {}'.format(opt, gen(SN)))AWG 53W5P642xxxxxxxWIFI C7EJA4S5xxxxxxxxMSO YR86Z8Z3xxxxxxxxFLX 7KACRPMUxxxxxxxxCFD GEJGN33DxxxxxxxxI2S F97MM4CFxxxxxxxx1553 3M4M8J3AxxxxxxxxFG PCJ9MI4Dxxxxxxxx16LA T3MBKQNWxxxxxxxx

author: bobberCHOP
author_rank: Newbie
timestamp: January 05, 2023, 12:59:16 am
content: I ran it again and this time it worked. Maybe I miss spelled something along the way???It works!!!
HP3478A Hi-Res Schematic  - Page 1
Forum section: electronics / testgear

author: Miti
author_rank: Super Contributor
timestamp: January 04, 2023, 08:35:00 pm
content: Do you have a high resolution schematic of the HP3478A, particularly around U512? In the service manual that I have I cannot see clearly pins 16, 18, 19.Cheers,Miti

author: gyachts
author_rank: Newbie
timestamp: January 04, 2023, 08:45:45 pm
content: This is the best scan I have, hope it helps.Greg

author: TheDefpom
author_rank: Frequent Contributor
timestamp: January 04, 2023, 08:47:04 pm
content: Does this help?

author: Miti
author_rank: Super Contributor
timestamp: January 04, 2023, 09:26:57 pm
content: Quote from: gyachts on January 04, 2023, 08:45:45 pmIs not very clear which is pin 18 and which is 19.Thanks

author: Miti
author_rank: Super Contributor
timestamp: January 04, 2023, 09:28:37 pm
content: Quote from: TheDefpom on January 04, 2023, 08:47:04 pmThis helps, thanks. OD is pin 18 and CE1 is pin 19.Miti
Aeroflex 3500A maintenance manual looking or who can provide CAL PASSWORD - Page 1
Forum section: electronics / testgear

author: BH3TXW
author_rank: Contributor
timestamp: January 28, 2022, 12:53:53 pm
content: Dears,I am looking for the Aeroflex/IFR 3500A Service manual or maintenance manual. The original P/N for it is 6108(1002-6201-4C0).Or any friend could provide the calibration password:However so far I wasn't able to find it...Any help is appreciated!Kind regards

author: M0HZH
author_rank: Regular Contributor
timestamp: January 28, 2022, 03:11:37 pm
content: Cal password for the COM-120 series is FMYSVCD, I imagine it's not the same but worth a try.If you won't get an answer here, it's worth joining these discussion groups as surely they will have people able to help:https://groups.io/g/IFR-Monitorshttps://groups.io/g/Marconi-Test-InstrumentsAlso the Batlabs forums had an active Aeroflex engineer onboard so there's a wealth of useful information there as well.

author: BH3TXW
author_rank: Contributor
timestamp: January 29, 2022, 03:45:59 am
content: Thank you so much！This problem has been haunting me for half of year.My 3500A works perfect EXCEPT carrier freq error, so the TCXO needs to be recalibrated,however, calibration is password protected. It was really A pain in eye.One thing for sure is that I tried every possible method that only number combination is accessible on this instrument. So the password should be number based.Thank you again for your advice.

author: BH3TXW
author_rank: Contributor
timestamp: January 29, 2022, 03:47:49 am
content: Thank you for anyone could help.Here's my email:chinesejames1990@aliyun.com

author: knapik
author_rank: Regular Contributor
timestamp: February 07, 2022, 04:13:18 am
content: Its 30203

author: BH3TXW
author_rank: Contributor
timestamp: January 12, 2023, 10:09:17 am
content: Thank you!Sorry I didn't notice your reply that time.But, again, thanks!RegardsJames
Longwei K3010d problem cant go below 5v - Page 1
Forum section: electronics / testgear

author: vsboost
author_rank: Contributor
timestamp: August 09, 2021, 07:35:29 am
content: Just posting this to help out anyone with the issue where the supply shoots down to 0v when going below ~ 5.6v the problem might be two of the three connections on the voltage adjustment pot might be reversed.See attachment

author: jeeek
author_rank: Newbie
timestamp: January 04, 2023, 01:13:10 am
content: HEY. what is the value of T2?
Tektronix THS 7xx battery mods ? - Page 1
Forum section: electronics / testgear

author: shakalnokturn
author_rank: Super Contributor
timestamp: January 01, 2023, 12:58:28 am
content: Posting some pictures of how I modified a THS 710 STD that has been sold since.Just got hold of a THS 720A I should be holding onto for a while. Of course the battery is dead... This time I'm thinking of a couple of 26650A Li-Ion cells that would keep the scope running for hours, the downside is that means added electronics.I'd like to hear if anyone has gone to more trouble than just swapping for Ni-MH.

author: jal1234
author_rank: Contributor
timestamp: January 03, 2023, 03:29:31 pm
content: I found this over on Thingiverse. I contacted the designer about the electronics inside, but he hadn't designed them yet. Shouldn't be too hard.https://www.thingiverse.com/thing:3704531/comments
Agilent 54620/54640 series unpacked firmware files - Page 1
Forum section: electronics / testgear

author: 1Ghz
author_rank: Unknown
timestamp: February 19, 2017, 03:02:31 pm
content: Hello, I was so bored this weekend...So I've unpacked Agilent 54620/54640 series firmware files using modifiedagltzip.I attached unpacked files.Header structureCode:#pragma pack(1)typedef struct{char revision;unsigned decomp_size;unsigned comp_size;char magic; /* JAZIP */unsigned char dist_width, size_width, unk0, unk1;} JZPHDR;Some strings...Code:PSOS-6800V4.1 COPYRIGHT 1983, 1984, 1985, 1986 SOFTWARE COMPONENTS GROUP, INC. AWelcome to 'Rocks'!Rocks worth: Big-25, Medium-50, Small-100 Enemy worth: 500, Enemy shot worth: 500Lose points if you stop shooting!!Now have fun!!...Congrats!That's a new HIGH score!Sorry dude, that wasn't good enough for the Hall of Fame!Rocks off forever...A.02.31 Agilent Technologies OscilloscopeJay AlexanderJuan ArevaloLisa BeyersMike BeyersRobb BongNeil ChambersJae-Yong ChangDennis DoschMischa FenderKen GeeBill GrayKent HardageMatt HolcombDana JohnsonJohn LaiMatt LangenbahnFrank LeriChee-Peng LimMike LujanLee MackSteve PeleloTom SchmidtKelly TappanDan TimmDerek ToeppenWarren TustinKyle WebbJohn ZuidemaExecuting startup sequence:/col/scopes/jediPlus2/sys/env68k/psos2/psos_indep.hSearch keywords: 54642D 54642A 54641D 54641A 54622D 54622A 54621D 54621A

author: wkb
author_rank: Super Contributor
timestamp: August 10, 2022, 06:32:01 pm
content: I liked this string best:"I just wrote me a minivan."

author: fenugrec
author_rank: Frequent Contributor
timestamp: January 02, 2023, 09:10:38 pm
content: Quote from: wkb on August 10, 2022, 06:32:01 pmInitially I didn't get the reference...https://dilbert.com/strip/1995-11-13
Siglent SNA6000A +++ - Page 1
Forum section: electronics / testgear

author: oewean
author_rank: Contributor
timestamp: December 13, 2022, 02:21:01 pm
content: Siglent is in a good pace in releasing exciting new productshttps://www.dianyuan.com/article/61071.htmlSNA6000A vector network analyzer, 100KHz - 26.5GHz, 4-portSEM5000A Electronic calibration module.SSM5000A switch/matrixSSU5000A Mechanical switch" alt="" class="bbc_img" />

author: Kenneth Rosenstroem
author_rank: Newbie
timestamp: December 13, 2022, 06:25:08 pm
content: That looks....expensive!

author: DonaldGreens
author_rank: Newbie
timestamp: January 03, 2023, 10:08:49 am
content: Interesting offer! But everything is known in comparison!!

author: baldurn
author_rank: Regular Contributor
timestamp: January 03, 2023, 04:36:38 pm
content: Also Rigol colored. Is Siglent switching color scheme? It is too bad as I liked the light color.
MSO5000 Hack ?? Can’t find it. - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: January 01, 2023, 02:26:12 pm
content: So I’m looking at picking up a new RIGOL MSO5072 but only if it can be hacked to 350mHz. I was told it’s possible and searched the forum but I can’t find the actual Hack the post went so fare off topic!Any help would be appreciated.

author: Martin72
author_rank: Super Contributor
timestamp: January 01, 2023, 04:15:39 pm
content: Hi,I´ve found it in 10 seconds - When I can find it, you´ll could it too.Nevertheless a little hint:Search forum : MSO5000 HackThe "huge" thread will appear under the first hits and on his last page you´ll get what you´re looking for.
121GW multimeter command line data logger for Linux - Page 1
Forum section: electronics / testgear

author: chlor
author_rank: Newbie
timestamp: December 30, 2022, 03:49:26 pm
content: Hihttps://github.com/chlordk/121gwcliHere is a simple way to use 121GW DMM as a data logger on Linux.It can log to screen, tabulated file and JSON-file/browser.It is based on the Bluetooth gatttool and connection retries must be expected but rather stable when the first connection is made.best regards

author: mendip_discovery
author_rank: Super Contributor
timestamp: December 31, 2022, 10:14:36 pm
content: I will make a note of this and give it a try. Thanks for making the effort to share it with us all.
Tektronix 7000B series OPTIONS CD or ISO  - Page 1
Forum section: electronics / testgear

author: charlyd
author_rank: Frequent Contributor
timestamp: October 20, 2022, 06:32:37 pm
content: Hello who can help me out with option software iso for the 7000B series. i have 2 isos from the generation a version but not from the B version.

author: calibrationfixture
author_rank: Regular Contributor
timestamp: January 01, 2023, 08:08:20 am
content: Hi,https://xdevs.com/doc/Tektronix/TDS5000B/With this I installed TDSVNM and TDSPTD Modules on the TDS7000B.Succes,Calibrationfixture
Cable needed for back of HP 70611a module - Page 1
Forum section: electronics / testgear

author: cncjerry
author_rank: Unknown
timestamp: December 30, 2022, 04:52:37 am
content: I bought an HP 70K spectrum analyzer and added the 70611a switch module to control some attenuators and RF switches. I bought a cable that was listed as needed to connect an 84940a driver board not realizing that another cable, termed a 36-Pin SCSI II cable was needed to bridge them. See the layout in the attached picture that I found later. These cables aren't cheap as you can imagine. All the 36-pin cables I found have a different connector, more like a parallel printer connector.I have just about all the different types of SCSI cables from years ago except that needed. The pins are sticking out on 70611a and now the 70611-60011 cable, that happens to be the same cable inside the 70611 module. so I guess I would need a female/female SCSI cable listed as 70611-60010 in the picture. The connector is 7mm wide by 33.5mm tall as in the attached picture.In the meantime I was able to open the module and just use a 34-pin ribbon to link the module's internal circuit board to the driver board (two pins aren't used in the SCSI jumper) to the external card but I'd like to put it all together as it was meant to be.I think I've looked at every 36 pin SCSI cable out on the web and haven't found the correct cable.Thanks for the help.Jerry

author: oewean
author_rank: Contributor
timestamp: December 30, 2022, 06:46:07 am
content: Hi!I think the connector is a Mini D Ribbon / MDR.https://eu.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/10136-3000PE?qs=cNqfq%252BgdtHPk65GVatnPUw%3D%3D

author: gslick
author_rank: Frequent Contributor
timestamp: December 30, 2022, 09:55:18 pm
content: I don't think that is a Mini D Ribbon / MDR connector. Looks more like an opposite gender HD SCSI type connector, and only 36 pins instead of the normal HD50 SCSI.I doubt a pre-built replacement cable could be found anywhere else except for an HP original 70611-60011 cable.If you wanted to try building a cable yourself, one source of mating connectors might be from Honda (HTK, or HONDA TSUSHIN KOGYO CO., LTD), in particular the PCS Series 1.27 mm Pitch Interface Connectors. PCS Series catalog attached below.PCS-E36FA Cable Connectors Female Straight IDCPCS-E36FS+ Cable Connectors Female Straight SolderingIn the US, onlinecomponents.com lists the PCS-E36FS+ connector in stock for $16.25, but the minimum order quantity is 10.https://www.onlinecomponents.com/en/honda-connectors/pcse36fs-40719898.html
Nicolet 310 osciloscope - Page 1
Forum section: electronics / testgear

author: Radio Tech
author_rank: Frequent Contributor
timestamp: May 31, 2013, 01:56:32 pm
content: Old friend dropped this off to me and said it does not work and you can have it. Well I can say I never seen one quiet like it before in my life. Perhaps this is one of the first "storage" type scopes? I did power it up just to verify and a red and green light comes on along with a fan. Know trace on the CRT though.So what the heck, I tore it apart.Did not find a lot of info online but did find a little. Say one place that repairs these for $2k lolLike to find a schematic on it so I can check out the power supply.Oh, and it came with a roll around cart!

author: Hydrawerk
author_rank: Super Contributor
timestamp: May 31, 2013, 02:30:40 pm
content: http://www.teknetelectronics.com/DataSheet/Nicolet/Nicol_310101945.pdfBandwidth 400kHz??Well, this must be a special scope from early 1990s or what.

author: Radio Tech
author_rank: Frequent Contributor
timestamp: May 31, 2013, 02:33:33 pm
content: Quote from: Hydrawerk on May 31, 2013, 02:30:40 pmLOL, yeah I laughed a bit when I first saw that myself.

author: SeanB
author_rank: Super Contributor
timestamp: May 31, 2013, 03:15:17 pm
content: Does it have the magnetic bubble memory in it? I see the interface there. It will look like a large flat metal can with a connector on the one end, made by most likely Intel ( Signetics I think also did them once). I want one.....

author: Radio Tech
author_rank: Frequent Contributor
timestamp: May 31, 2013, 03:24:06 pm
content: Quote from: SeanB on May 31, 2013, 03:15:17 pmNope, empty slot with a black cover over where it should be. Looks like the option did not come with this one.

author: kfitch42
author_rank: Frequent Contributor
timestamp: May 31, 2013, 03:26:31 pm
content: QuoteDood! way ahead of its time!QuoteAlmost twice the size of the current Tek scopes!http://www.tek.com/oscilloscope/tbs1000-digital-storage-oscilloscopehttp://www.tek.com/oscilloscope/tds1000http://www.tek.com/oscilloscope/tds2000-digital-storage-oscilloscopehttp://www.tek.com/oscilloscope/tps2000

author: PeaceFrogger
author_rank: Newbie
timestamp: December 31, 2022, 04:50:44 am
content: Did you archive the manual by chance?
That CMRR Video - trying to replicate Rigol MSO5000 and MicSig DP750 - Page 1
Forum section: electronics / testgear

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: December 30, 2022, 02:30:16 pm
content: As it says, trying to replicate the CMRR measurement technique.Im using 5V pp sine wave at 10MHz from G1, 50Ω termination on CH1, tee with +ve output to DP joint probes on another channel, just as per Dave's video. No BW limits, 100MHz scope.What I'm confused about are the readings of Vrms with the Rigol on the DP trace.The Vrms from the MEASURE > ADD > VERTICAL > VRMS function says 236µV AVG (using 10,000 counts).The "AC+DC RMS" from the MEASURE > ANALYZE > DVM says 260µV, but the "AC RMS" says 210µV, and the "DC" says -170µV.From my maths, the DVM AC and DC readings would produce a combined RMS of indeed about 230µV.I appreciate the DVM values are 'instantaneous' and the others obviously smoothed, but the DVM ones I am quoting are reasonably stable.What am I missing?I am now also, therefore, confused about the std. deviation measurement Dave refererd to...