hybridfree/eevblog-posts huggingface dataset:
Rishabh Rish Multi 20 Digital Multimeter , 5 ¾ places - Page 1
Forum section: electronics / testgear

author: DariuszEE
author_rank: Newbie
timestamp: March 12, 2023, 01:30:49 pm
content: Hello everyoneI would like to ask if anyone has dealt with the Rishabh Rish Multi 20 multimeterWhich DMM METRAHIT is a copy of?Please let me know if this DMM Rishabh Rish Multi 20 is worth buying?https://rishabh.co.in/product/120/rishmulti-20

author: coromonadalix
author_rank: Super Contributor
timestamp: March 12, 2023, 03:37:46 pm
content: Rishab is an OEM / partnership version of the gossen 28, minus some functions removedshould be compatible with the same gossen adpaters, not sure of the reading speed 2 - 2.5 rds a secexpensive to calibrate, no parts ...
"upgrade" TDS7254B to7404B possible ? - Page 1
Forum section: electronics / testgear

author: alpher
author_rank: Frequent Contributor
timestamp: March 11, 2023, 02:08:25 pm
content: Casual glance at the parts list shows no differences, wonder if it's something worth pursuing.

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 11, 2023, 02:42:56 pm
content: Try asking here:https://www.eevblog.com/forum/testgear/tek-csa7404-repair-project/700/
Need help choosing equipment for Electronics Lab - Page 1
Forum section: electronics / testgear

author: asperised
author_rank: Contributor
timestamp: March 10, 2023, 01:58:12 pm
content: Hello everyone,I have been asked to choose the test equipment for my workplace electronics lab. So far we have been getting away with using just multimeters, cheap logic analysers, cheap dc power supplies, rented oscilloscopes, etc. but now that we have started designing our own PCBs and power electronics/microcontrollers/fpga circuits we feel we are in need of better equipment (esp after losing an expensive component to a malfunctioning power supply). I have been put in charge of choosing the equipment for this lab upgrade. So far based on my research I have come to a couple of conclusions based on our workflow.We need an oscilloscope mainly for analysing digital signals from a microcontroller/FPGA, characterising and benchmarking power supply circuits. I think a 4ch 200MHz oscilloscope with logic analyser functionality should be more than enough for this task. The thing is that there are so many of these oscilloscopes at so many different price points it's getting difficult narrowing down on a single product.For the power supply I was looking at the SPD3303X-E from Siglent. Seems to be good enough from the reviews and Daves teardown.For the logic analyser I was looking at Digilent digital discovery or something in that price range.We need a electronic load and they seem to be somewhat expensive as well. Would require your help in choosing one.Would be great if you can help me out. If you need any information from me besides what I've put up here please let me know as well.
Repair Agilente U1232A Value component - Page 1
Forum section: electronics / testgear

author: visionbr
author_rank: Newbie
timestamp: March 09, 2023, 11:01:58 pm
content: I need help Agilente U1232A , what are the values of the 2 input resistors marked with a white and a yellow dot , RT1 , RT2 and RT3 , E1 , E2 and E4 ? Thanks for the help and your time.https://www.eevblog.com/forum/index.php?action=dlattach;topic=69646.0;attach=232979;imagehttps://www.eevblog.com/forum/index.php?action=dlattach;topic=69646.0;attach=232977;image
Does anyone here have a Hickok 6000A tube tester? - Page 1
Forum section: electronics / testgear

author: cvanc
author_rank: Frequent Contributor
timestamp: March 08, 2023, 04:46:26 pm
content: If you have one can you please share what your roll chart says for 6KD6 and 36KD6? My chart is old and does not have them. Thanks!

author: 5065AGuru
author_rank: Frequent Contributor
timestamp: March 08, 2023, 06:31:22 pm
content: 6.3V for 6KD6 and 35.0V for 36KD6Other settings the same for both B3-5632-4 70 90 A 6400"connect jumper from tube cap to pin 6 on octal socket.Cheers,Corby

author: cvanc
author_rank: Frequent Contributor
timestamp: March 09, 2023, 05:06:32 am
content: Many thanks!
Fluke 80T-150 - Page 1
Forum section: electronics / testgear

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 10, 2023, 01:48:39 am
content: Update there are 2 versions at leastThe 1st units had one soldered in 2.9Volt 0.5Ah lithium battery as shown in manual as BT1.Later units had two clip in N type 1/2 AAA 1.5Volt MN9100 batteries and no manual.Jeff
eLoad in transient mode - Page 1
Forum section: electronics / testgear

author: Faringdon
author_rank: Super Contributor
timestamp: March 08, 2023, 01:34:57 pm
content: Hi,Customer sent us a 37V single stage PFC'd Flyback of 230W (6.2Aout) Peak. 150W (4.1Aout) average.37Vout.We sent it no_load_to_full_load transients of time length 13.5ms. (using SDL1030X E-load in resistance mode, but pulsed)The eload was 10k for 5.013 seconds, then 6.5R (5.6A) for 13.5ms, repeatedly.Every 7th , or so, pulse, the Flyback dropped out and went below 8Vout for 8 seconds, then recovered.....for all the other load transients, the vout just dipped down to ~28V and back up to 37V (in 17ms).Do you think the eload struggles to "get into regulation" at the start of the transient pulse?.....ie, it might have been a lot less than 6.5R when it was first applied, and would have drawn a much_higher_than 5.6A current?SDL1030X ELOAD used...https://siglent.co.uk/jg/wp-content/uploads/2021/08/Siglent-SDL1000X-Electronic-Load-Datasheet.pdfP.S. (or did we just catch it at the mains zero crossing)

author: alm
author_rank: Super Contributor
timestamp: March 08, 2023, 02:10:21 pm
content: Connect a current probe or current shunt between PSU and load and measure with a scope. That will show you exactly how the load is behaving in your system. Cable length (lead inductance and capacitance) may matter.
ID Lambda rack mount supply - Page 1
Forum section: electronics / testgear

author: Fred_47
author_rank: Contributor
timestamp: March 08, 2023, 02:59:23 pm
content: I was recently gifted the Lambda power supply shown below. (With the HS hinged open.)As the label says, it was modified to output 15V probably by Bailey Meter Co. who, I assume, removed the nameplate.When Bailey went out of business this PS was acquired by a radio repair man who adjusted it to about 13.5V to use for car radio repair.It works tho I haven't loaded it yet, and is adjustable from about 10.3V to about 15.8V where the crowbar trip triggers. There is an unlabeled adjustment that was exposed when the nameplate was removed. Input power is 115VAC thru exposed terminals on the back. There are sense terminals and output is via 1/4-28 studs. All terminals are on the back.This thing is very heavy. It probably weighs as much as my Fluke 355D.It is obviously a linear regulator circuit with a crowbar that trips the input breaker by shorting the output thru a massive SCR or triac. The heatsink has 9 transistors and a thermal switch and is hinged. There is no fan. I can't read the transistor ID but there is 1 RCA 36485 mounted separately which I assume is the driver.The rectifiers are (W) FBL-00-053, Vr 70Vrms, If 35A.I don't have any info as to the model number, what the ratings are and how to adjust the crowbar trip. The most recent date code is 7044 on the rectifiers.My guess is 15V, 500W rack mount system supply maybe 20V, 750W. (edited)Can anybody ID the model, ratings and adjustments. A manual or schematic would be useful.

author: coromonadalix
author_rank: Super Contributor
timestamp: March 08, 2023, 03:47:46 pm
content: Not sure but check Lambda LM Gxx seriesLM G15LM G5 ....LM A packagehttps://ia601307.us.archive.org/27/items/bitsavers_lambdaLambstructionManual_3245315/Lambda_Model_LM_A_Package_Instruction_Manual.pdfLM F packagehttp://manuals.repeater-builder.com/te-files/LAMBDA/LAMBDA%20LM%20F%20Package%20Instruction.pdfOn Ebay seems this onehttps://www.ebay.com/itm/133014214879Model LM FA10maybe its the F package link i've put here

author: Fred_47
author_rank: Contributor
timestamp: March 08, 2023, 09:31:03 pm
content: Quote from: coromonadalix on March 08, 2023, 03:47:46 pmIt looks exactly like the one on eBay minus the nameplate badges.I'll have to compare some of the parts and trace some wires to be sure but it appears to be an F package.Based on the large caps (7800uF) it's an LM-F24 thru 36 and based on R1 (2.2k) it's not an LM-F36.Thanks much!edit-Based on the transformer part number it is definitely an LM-F24. (I should have said "was". It's now an F15 hybrid.)

author: coromonadalix
author_rank: Super Contributor
timestamp: March 09, 2023, 01:41:18 am
content: hope it helps
why I get errors from siglent magic script? - Page 1
Forum section: electronics / testgear

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: March 07, 2023, 03:37:06 pm
content: HiHere is the magic script,Code:import hashlibSCOPEID = '0000000000000000'Model = 'SDS2000X+'# Note that 'AWG' should be used for the 'FG' option# If you have the 100 MHz model, then first upgrade it to 200 MHz, then 350 MHz and finally 500 MHzbwopt = ('25M', '40M', '50M', '60M', '70M', '100M', '150M', '200M', '250M', '300M', '350M', '500M', '750M', '1000M', 'MAX', 'AWG', 'WIFI', 'MSO', 'FLX', 'CFD', 'I2S', '1553', 'PWA')hashkey = '5zao9lyua01pp7hjzm3orcq90mds63z6zi5kv7vmv3ih981vlwn06txnjdtas3u2wa8msx61i12ueh14t7kqwsfskg032nhyuy1d9vv2wm925rd18kih9xhkyilobbgy'def gen(x):h = hashlib.md5((hashkey +(Model+'\n').ljust(32, '\x00') +x.ljust(5, '\x00') +2*((SCOPEID + '\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:n = 4line = gen(opt)print('{:5} {}'.format(opt, [line[i:i+n] for i in range(0, len(line), n)]))When I run it it would generate errors?QuoteWhat am I missing?Note I'm a noob in python

author: TomKatt
author_rank: Frequent Contributor
timestamp: March 07, 2023, 03:44:00 pm
content: I'm a linux noob myself and got similar errors when I ran the code. Eventually I tried a different compiler and it worked fine. Not sure what the problem was.In any case, copy and paste your code into another compiler, like this online version:https://www.online-python.com/I just tried it and it successfully completes.Quote

author: colorado.rob
author_rank: Frequent Contributor
timestamp: March 07, 2023, 04:58:56 pm
content: What version of Python are you using, 2 or 3?

author: tautech
author_rank: Super Contributor
timestamp: March 07, 2023, 06:52:10 pm
content: Quote from: ali_asadzadeh on March 07, 2023, 03:37:06 pmYours has lots of unnecessaryIt's very different to one I have saved so I suggest you look for another version.

author: abeyer
author_rank: Frequent Contributor
timestamp: March 07, 2023, 09:44:59 pm
content: There's nothing wrong with that one, it's just python 3 and won't work as-is in python 2.AddingCode:b = ord(b)between line 19 and 20 (the first line of the for loop) should get it to work in 2 if you need to, I think.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: March 08, 2023, 08:02:21 am
content: my python version is Python 2.7.18

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: March 08, 2023, 08:03:43 am
content: I have changed to the latest python and it just works
Adjusting of coupled filters with a VNA - Page 1
Forum section: electronics / testgear

author: DeepLink
author_rank: Regular Contributor
timestamp: March 07, 2023, 09:34:35 am
content: HiNeed to adjust some coupled filters, (3 to 5 poles - below 500MHz)Having read the app note 1287-8 from HP, it seems that "Time Domain Analysis" is the way to goI do haveHP 8714ES w. opt. 100Siglent SVA1032X w. DTFNone of these VNA's offer real Time Domain Analysis, but are the DTF options any good for adjusting filters?I can't afford a E5071 or other fancy equipment, so I'm looking for a way to do it with what I have now, or the next step upMaybe a HP 8753* with opt. 010?How are you adjusting coupled filters?

author: S57UUU
author_rank: Regular Contributor
timestamp: March 07, 2023, 03:25:59 pm
content: I guess these are bandpasses?You can tune them in frequency domain, with a normal network analyzer (even a scalar one).Measure S11 (do not forget a load at port 2).Tune all of the resonators way off (or short them). Do a response calibration (normalization).Tune the first resonator, to get a minimum in S11 at center frequency. At this stage set the scale to 1dB/div or less, since the minimum will be very shallow. You can deepen it by introducing some loss (finger...) into resonator #2.Next, tune resonator #2. Depending on your coupling between the resonators (filter width), the minimum will split into two, or just become deeper. If split, tune #2 so, that the two dips are symmetrical around center frequency.Tune #3 to get three symmetrical dips, etc.Marko Cebokli
Signal Recovery 5113 pre-amp calibration procedures - Any ideas or experience? - Page 1
Forum section: electronics / testgear

author: CorporateReference
author_rank: Contributor
timestamp: March 06, 2023, 06:40:26 pm
content: We had to replace the 2 front end FETs on our SR 5113, however after doing so the overload indicators are coming on at certain gains. From our experience with the Stanford Research SR560, several trimmers need to be adjusted after such a procedure. Signal Recovery/Ametek Support is non-responsive or unknowledgeable thus far and the manuals do not mention calibration proceedures. Does anyone here have any experience?The SR560 lists such a procedure here:https://www.thinksrs.com/downloads/pdfs/other%20stuff/SR560_offset.pdfThe architecture is very similar so I could infer what to do, but if anyone has any "insider" info that would be greatly appreciated.

author: _Wim_
author_rank: Super Contributor
timestamp: March 06, 2023, 08:20:08 pm
content: Quote from: CorporateReference on March 06, 2023, 06:40:26 pmNot have come across this, but would be great to have this info indeedQuote from: CorporateReference on March 06, 2023, 06:40:26 pmI also did not have any luck getting support when repairing my 5113. However, when I asked for support repairing a few lock-in amplifiers, they did offer excellent support, so it really does depend on who handles the request within the company.I can make some measurements on my 5113 unit if required, so you have a reference. Just ask what you need measured.

author: _Wim_
author_rank: Super Contributor
timestamp: March 06, 2023, 08:31:15 pm
content: Attached a picture of the much simpler 5186 that uses the same topology (npd5564 + INA103 + AD opamps).This board has the adjustment pots labeled:- R41: drain I (1K)- R28: DC Off (1K)- R11: O/P Off (10K)I expect the 5113 to have a similar config.

author: RaymondMack
author_rank: Regular Contributor
timestamp: March 08, 2023, 12:36:44 am
content: I'd also like to know the adjustment procedure. It's unfortunate that calibration documentation has been removed from modern manuals. I guess someone thought they could squeeze more money out of their products if they had to be sent back for adjustment. Even the Chinese are following suite with this mentality (Rigol in particular).I suspect we might have to just draw out the circuit and make educated guesses on how to adjust these amplifiers. I had to do this with my Clarke Hess 2330 sampling power meter which was pretty straight forward. That said, the official cal procedure stores the zero offsets of the ADCs in EEPROM which I've yet to figure out. So I haven't been able to perform a complete cal adjustment, much to my chagrin.
Tek TDS744 died 5 days after fixing the color issue - Page 1
Forum section: electronics / testgear

author: H1t3ck
author_rank: Newbie
timestamp: March 07, 2023, 02:01:15 pm
content: Well after enjoying the new to me TDS744 after fixing the color issue, five days later it died. Upon turn it on the power supply would cycle on and off (the front panel LEDs would come on and off repeatedly every 3 to 5 seconds).After further investigation found out the HV Power Supply was overloading the 25V supply as it tried to come up and the Main PS would shut down and repeat in an endless cycle.By unplugging the connector to the HV supply then the system came up normally when turned on.After some more in detail investigation of the HV supply I found the HV transformer pin3 was open which supplies the 75volts, no continuity between pin3 and pins 1,2 and 9. However, looks like pin3 was now shorted to the primary pin 4.So I was hoping to keep the scope in the original configuration, i.e. not switch to a LCD display.Will have to see if I get lucky and find a HV transformer (120-1930-00) for a reasonable price.Interestingly the HV transformer might had been replaced once in the past judging by the solder connections.I guess having 30 yr old TE you have to expect issues.Tony

author: nctnico
author_rank: Super Contributor
timestamp: March 07, 2023, 02:48:22 pm
content: This sucks.... I feel really sorry for you. Unfortunately these HV transformers are prone to failure. I have had a couple of these scopes through my hands with broken HV transformers. I got lucky once and managed to snatch up an entire CRT board for a low price on Ebay. Seller didn't know the actual worth...

author: TERRA Operative
author_rank: Super Contributor
timestamp: March 07, 2023, 03:12:33 pm
content: I still have a spare CRT board you can have for cheap plus post from Japan if you want it.Or I can pull and send just the transformer, whatevs.
Agilent N1996A in SA mode? - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 12, 2023, 09:26:42 pm
content: I've been looking at the sidebands of my older Drake R4C PTO. I'd like to get the highest peak to rest at the 0 dBm line, it's usually a few dBm below so I have remember that number to calculate the level of the 2nd highest peak. I'm not sure if it's possible but it sure would be much easier to see how much lower the 2nd peak is without arithmetic. I've attached a couple of pics,Thanks for any suggestions.Hank

author: Bud
author_rank: Super Contributor
timestamp: March 12, 2023, 09:40:36 pm
content: Cant' you setup a delta calc for marker 2 minus marker 1?

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 12, 2023, 11:14:29 pm
content: Hey BudThat works great, thanks for the tip. Can the first peak be relocated so that it rests at theO dBm reference line?Hank

author: Bud
author_rank: Super Contributor
timestamp: March 13, 2023, 06:08:43 am
content: It can't rest on 0dBm line unless the peak itself is of 0dBm power. Perhaps you mean the peak to touch the top of the scale? Look for a setting which sets the Reference line level. Many devices allow you to specify the Reference line. Currently your Reference line is set to 0dBm. If you change it to be equal to the peak level, your peak will move so it will touch the top of the scale.
Fluke 83V, 87V, 88V multimeter recall - Page 1
Forum section: electronics / testgear

author: FIXITNOW2003
author_rank: Regular Contributor
timestamp: March 07, 2023, 10:22:45 am
content: https://www.fluke.com/en-us/support/safety-notices/8x-v-safety-notice

author: Black Phoenix
author_rank: Super Contributor
timestamp: March 07, 2023, 11:15:45 am
content: It has been already widely reported here. Both with the Australian and UK government safety agencies reports.https://www.eevblog.com/forum/testgear/fluke-8x-safety-issue-recall!/msg4006708/#msg4006708This is the original post, there should be others somewhere but the search is not working well for me.
Agilent N1996A firmware upgrade 2.0 to 2.07 - Page 1
Forum section: electronics / testgear

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 05, 2023, 03:42:04 am
content: Just downloaded on my Win10 PC Agilent upgrade 2.07 firmware to a USB flash drive from Keysight and followed all the steps given and no luck upgrading. The 3 files are:A.02.07.pkg 21,460 KBN1996A.pkg 14 KBinstallFlags. 1KBwhich are new to me. My Mac would not allow a download for security reasons. Any help appreciated.ThanksHank

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 05, 2023, 11:59:42 pm
content: After wasting many, many hours I feel defeated. I wonder if someone with an Agilent N1996A has updated their firmware to A-02-07 and can tell me how to do it as at 82 I'm not having much luck. Or if you are experienced with Agilent and their updates can you make the files and send them to me?ThanksHankkolesnik@sbcglobal.net

author: TheSteve
author_rank: Unknown
timestamp: March 06, 2023, 04:19:28 am
content: On the flash drive you should see three things in the root directory - a directory(folder) named A.02.07 and two files named system.ini and version.What you listed is the contents of the A.02.07 folder which is not what the installation instructions say should be in the root of the flash drive.Unzip the downloaded A-02-07-USB.zip to a flash drive and it will be done. Plug the flash drive into the N1996A and power it on.

author: wd5jfr
author_rank: Regular Contributor
timestamp: March 06, 2023, 10:59:28 pm
content: Finally go it upgraded and after several more failed attempts it worked and I guess I lucked out. PC Win10 hasn't been my strong suit after giving up on my Mac. During the successful install I noticed the progress ribbon at the bottom of the A1996A display indicated .PKG files being used .ThanksHank
Problems connecting XDM3051 through a router - Page 1
Forum section: electronics / testgear

author: breinholm
author_rank: Newbie
timestamp: February 23, 2023, 02:34:22 pm
content: I have tried to connect to my OWON XDM3051 over LAN in several ways. All were tested using Testcontroller on my WIN10 PC:Entered an IP in the non-DHCP range on XDM and 5025 as the port, 255.255.255.0 as the subnet mask, and the IP of my router as Gateway IP - No connectionSame settings, but now with the IP of my PC as Gateway IP - No connectionTried the same on an old router with only the two participants - No connectionConnected the XDM directly to my PC and entered an IP manually: 192.168.1.1 - Data entered on the XDM: IP192.168.1.2, Gateway192.168.1.1 - Success!!Has any of you had success in connecting the XDM3051 through a router?Thanks / Peter

author: Tjuurko
author_rank: Regular Contributor
timestamp: February 27, 2023, 05:23:21 am
content: To access devices inside the home network, you need to configure "Virtual Servers" on a router.

author: J-R
author_rank: Super Contributor
timestamp: February 27, 2023, 05:46:16 am
content: The virtual servers setting should be to access LAN devices from the WAN (Internet), which I don't think the OP is trying to do.Typically you would use DHCP on both devices while they are connected to the same LAN segment (inside network on your router). Then verify both devices have an IP address in the same subnet. They will now be able to reach each other. Of course the de-facto test is to ping the Owon's IP address from the PC.It is common for basic devices like this to have trouble going through a router between two different subnets, so I would avoid that for now.

author: breinholm
author_rank: Newbie
timestamp: March 06, 2023, 02:34:48 am
content: Thanks for your replies,I can confirm that the XDM3051, My PC, and the router are working in the same IP segment in my network: 192.168.1.x - But the XDM3051 can't be reached.I have entered the address and MAC of the XDM in the manual list of my ASUS router, also without success!Using the RS232 port enables me to do measurements. But that's definitely not what I had in mind when I bought this, in other ways OK instrument.

author: beltet
author_rank: Newbie
timestamp: March 06, 2023, 03:46:33 pm
content: It may be obvious, but have you set gateway and netmask on the meter? As it may have badly implemented DHCP?

author: J-R
author_rank: Super Contributor
timestamp: March 06, 2023, 10:03:39 pm
content: Gateway and netmask typically wouldn't be an issue if both are on the same LAN segment. Although it's technically possible to use something like 255.255.255.255, I wouldn't expect this normally.To start, it would be best to list out here the full IP, subnet mask and gateway that the Owon and the PC have right now.Then, what do you get when you ping the Owon from the PC?Side note, is there a chance the PC is using wireless instead of the LAN? That could add some additional things in the mix to check out, such as wireless client isolation and WLAN-->LAN blocking.
RIGOL DG2025 Programmatically creating arbitrary waves - Page 1
Forum section: electronics / testgear

author: gongallard
author_rank: Newbie
timestamp: March 06, 2023, 05:27:34 pm
content: Hello everyone.I'm implementing a script to create programmatically arbitrary waves using binary data transfer.I use the arbitrary waveform generator RIGOL DG2025 (DG2000 series) and I have followed the steps of the following link,https://rigol.my.site.com/support/s/article/methods-for-programmatically-creating-arbitrary-waves1In this article, previously to download the waveform we would send the following commands,"Before sending the actual data using one of the 3 data formats each of these examples also sends the following commands:“:SOURCE1:FUNCTION USER”‘sets the mode to ARB on the DG5“:SOURCE1:FUNCTION:ARB:MODE PLAY”‘sets play mode so we get each point at even timing. As opposed to normal mode'that sets a time interval for the pattern to complete in.“:DATA:POINts VOLATILE, 16383”‘sets the number of points in the arb. Varies depending on length."However for the Rigol waveform generator DG2025 the commands":SOURCE1:FUNCTION:ARB:MODE PLAY" and “:DATA:POINts VOLATILE, 16383” don't exist.see the linkhttps://www.rigol.eu/Public/Uploads/uploadfile/files/ftp/DG/%E6%89%8B%E5%86%8C/DG2000/EN/DG2000_ProgrammingGuide_EN.pdfQ1. Has anyone had any experience with these commands that I should use for the ARB DG2025?Also, I was able to download a waveform to the generator using the method of binary data transfer.To define the variables "channel", "sample rate", "amplitude" (volts peak to peak), "offset", and "start phase", we used the following command,":SOUR<channel>:APPL:SEQ <sample_rate>,<amplitude>,<offset>,<start_phaes>"after that, to download the waveform I used the following commands,":TRACe:DATA:DAC16 VOLATILE,CON,#<size_field_characters_amount><binary_data_size><binary data>"":TRACe:DATA:DAC16 VOLATILE,END,#,#<size_field_characters_amount><binary_data_size><binary data>"The values of the data binary are between the limits 0x0000 and 0x3FFFThe waveform generated respects the sample rate and amplitude but the offset has a weird behavior, at least we were expecting.e.g :SOUR1:APPL:SEQ 160000,1,0,0The waveform appears mounted on 0.5 Volts of offset. Changing the offset value won't respect the offset value assigned as I expected.I don't understand this behavior.Q2. Is anyone has any tip to use a command to define the channel, sample rate, amplitude, offset, and phase for a signal downloaded through the binary data transfer method?Thanks,Gonzalo.
MOVED: EG4 Life Power4 Li Ion batteries start up  , more batteries  for bigger loads ? - Page 1
Forum section: electronics / testgear

author: Halcyon
author_rank: Unknown
timestamp: March 06, 2023, 12:07:59 pm
content: This topic has been moved toPower/Renewable Energy/EV's.https://www.eevblog.com/forum/index.php?topic=367604.0
SSA3015X Plus remote file access - Page 1
Forum section: electronics / testgear

author: Ross
author_rank: Contributor
timestamp: March 02, 2023, 04:40:24 am
content: Hi Everyone,I am probably missing something very obvious, but for the life of me I can't seem to work out how to get access to the Siglent Spectrum anayliser file system. I would like to get the test results and spectrum save on the unit. I have had a look at the manual and the web doesn't help.Anyone know how to do this,Thanks,Ross

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2023, 06:13:01 am
content: Quote from: Ross on March 02, 2023, 04:40:24 amPress File to enter the File Manager UI.Then select View All to see all files saved in the Local file system.Select/highlight files of interest and press Copy then select your USB stick and Paste the file to USB.Rinse and repeat.TipsHere I use a USB hub to allow for a mouse and USB stick connected into the one USB port these are equipped with.

author: Ross
author_rank: Contributor
timestamp: March 02, 2023, 08:55:22 pm
content: Hi,Thanks for your response, so there is no way to get the files over LAN or USB host?Thanks,Ross

author: hendorog
author_rank: Super Contributor
timestamp: March 03, 2023, 12:31:27 am
content: Hi Ross,You should be able to access it via FTP.Sorry not around an instrument for a while but hopefully that will help you figure it out.

author: Ross
author_rank: Contributor
timestamp: March 06, 2023, 01:59:24 am
content: Quote from: hendorog on March 03, 2023, 12:31:27 amThanks that is exactly what I am looking for, surprised it is not mentioned in the manual, perhaps I was looking at the wrong one.
No TLA7BXX DesKew Fixture, but what is it? - Page 1
Forum section: electronics / testgear

author: calibrationfixture
author_rank: Regular Contributor
timestamp: March 05, 2023, 08:35:14 am
content: Hi to All,Saw this "Fixture". Inadvertently described as DesKew Fixture, but no provision is seen for Probes. In addition: documented TLA7BXX Deskew Fixtures are different, not populated with that much electronic. Anybody who knows the in and outs?Calibrationfixture

author: nctnico
author_rank: Super Contributor
timestamp: March 05, 2023, 11:20:34 am
content: I think this could be for deskewing the acquisition module itself. IIRC the TLA7Bxx modules have an SMA connector to provide the deskew test signal.

author: calibrationfixture
author_rank: Regular Contributor
timestamp: March 05, 2023, 12:40:08 pm
content: Hi nctnico,Thank you for your reply. I also thought of that. I have more then one TLA7BXX Module and the TLACAL Verfication and Adjustment Prodedures don't ask for such a Fixture in their Instructions, only the 020-2940-00 and 020-2942-00 Fixtures are mentioned. In addition: Restoring Factory Defaults and Module Self-Calibration also don't need it. Maybe it is a Production Tool, needed to create Factory Defaults.Calibrationfixture

author: nctnico
author_rank: Super Contributor
timestamp: March 05, 2023, 01:58:25 pm
content: The module in the photo looks more usefull to do probe calibrations
Restauration R&S ESCS30 - Page 1
Forum section: electronics / testgear

author: 3isenhorn
author_rank: Contributor
timestamp: March 05, 2023, 10:24:19 am
content: Hello,I got an R&S ESCS30, unfortunately it is not working. After opening it up, it turns out there is no CPU board.So I either search for a CPU board or try to reverse engineering.In any case, I'm searching for all kind of information about the device, especially the Service Manuals.More information will follow.Thank you in advance.

author: AFTORF
author_rank: Contributor
timestamp: March 05, 2023, 01:45:40 pm
content: It's not so easy to find. Perhaps, you could see on this website about ESPC and all similar EMI receiver with "ES" references made in the 90's :https://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Rohde_Schwarz

author: 3isenhorn
author_rank: Contributor
timestamp: March 05, 2023, 05:56:41 pm
content: Thank you! Yes Information are hard to get.Howvever I will study the other manuals, however it seem that the CPU board included the ADC converter. I hope that I just can read them out, let see what happened.
Looking for documention on the HP / Agilent 4263A LCR meter - Page 1
Forum section: electronics / testgear

author: drkirkby
author_rank: Newbie
timestamp: September 01, 2018, 10:20:07 pm
content: The 4263A user manual is on the Keysight website, and I found a datasheet online, but having a series manual or other documents would be useful.Dave

author: FransW
author_rank: Frequent Contributor
timestamp: September 02, 2018, 08:40:44 am
content: HP 4263A LCR Meter:User's guidehttp://literature.cdn.keysight.com/litweb/pdf/04263-90001.pdf?id=72268636 pagesAgilent 4263B LCRMeter Operation Manual:http://www.doe.carleton.ca/~nagui/labequip/lcr/4263B_Operation%20Manual.pdf

author: JohnPi
author_rank: Regular Contributor
timestamp: March 05, 2023, 01:24:49 am
content: I am also looking for documentation on the HP4263A-- specifically the GPIB/HPIB command set.I have not been able to find any documentation on this online. Are these identical to those for the 4263B?
FLUKE 97 DIY IR Cable - Page 1
Forum section: electronics / testgear

author: rcard53762
author_rank: Newbie
timestamp: February 07, 2023, 02:16:53 pm
content: I am looking for a DIY build for a Fluke 97 scopemeter IR cable.Can anybody point me in the right direction?Thanks if you can.

author: scopeman
author_rank: Frequent Contributor
timestamp: March 03, 2023, 04:27:11 am
content: $55 for a USB one on eBay. They also work for Rohde & Schwarz FSH series Spectrum Analyzers. Cheap enough!https://www.ebay.com/itm/155376235888?hash=item242d253570:g:wsUAAOSwPnxh1W-L&amdata=enc%3AAQAHAAAAoD5fh9WXVoyZlyfd0HLQYyvi9emLF8MzO2wZ95jcietZm2UzWun6aVBLfB%2FCs6Ez17xc8QFdfPZWzOUJHwNIpb49PPqZ4d1FwebOrw31dXod7Fan65uL%2F1FFi9Ir866dQxv9JUYqoDKkfHzvNaon8DNDW3P7NIOmfiaPpsU7rrN31L5LCHLgSnWgLAQnGszVbb5lFjuORqjxhA9bfqbgFYM%3D%7Ctkp%3ABk9SR_iat9vUYQSamW3OHM

author: scopeman
author_rank: Frequent Contributor
timestamp: March 04, 2023, 09:05:20 pm
content: Okay someone complained about the length of the link (although I tested it and it worked for me!). Here is a shorter one:https://www.ebay.com/itm/155376235888?SamW3OHM
Frequency counters operation - Page 1
Forum section: electronics / testgear

author: Y2KEDDIE
author_rank: Newbie
timestamp: March 04, 2023, 04:12:54 pm
content: I’ve noticed some frequency counters, when no signal is applied to the input, the display reads all zero’s, as one would expect.Some counters display random readings, until a signal is applied, or the reset button is pressed. This is the case of a high resolution counter I bought from e-bay. The operation literature say’s Radom display is normal operation.Why do some counters require a manual reset and others don’t.

author: pcprogrammer
author_rank: Super Contributor
timestamp: March 04, 2023, 05:10:33 pm
content: Open input sensitive to noise?No proper power on reset in the circuit?

author: shakalnokturn
author_rank: Super Contributor
timestamp: March 04, 2023, 05:10:47 pm
content: I suppose it has something to do with the way they trigger and surrounding EMI.

author: xrunner
author_rank: Super Contributor
timestamp: March 04, 2023, 05:30:51 pm
content: Quote from: Y2KEDDIE on March 04, 2023, 04:12:54 pmIf the input isn't terminated, then it's going to receive signals from the environment at the center pin of the input connector, however poor of an "antenna" that tiny piece of metal is. Now, they may be very small signals or they may not be - it depends on your local environment and the sensitivity of the unit. Try terminating with a 50 ohm termination and see if the random signals stop.

author: edpalmer42
author_rank: Super Contributor
timestamp: March 04, 2023, 06:59:18 pm
content: The other thing you can do to suppress the garbage displays is to move the trigger level slightly off zero. It won't affect a normal reading since the input will hopefully be at a much higher level. Note that this type of garbage display could be caused by either external signals or internal noise or a combination of both.Ed

author: factory
author_rank: Super Contributor
timestamp: March 04, 2023, 07:07:40 pm
content: This is normal for some of the prescaler/divider ICs, for example the Plessey SP8703, which will self oscillate with no input, it can be fixed by adding a resistor to one of the inputs, but this reduces the sensitivity.David
Repairing HP 8592D analyzers (Shifted frequency) - Page 1
Forum section: electronics / testgear

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 07, 2023, 03:10:48 pm
content: I've been tasked to repair test equipment at work, most are simple repairs, i.e. overloaded output stages, blown transistors...Now I have several HP 8592D analyzers, the service manual is a bit of a nightmare so I was wondering if anyone had similar issues and could show some guidelines, the reported frequency is shifted ~200KHz lower and slowly gets to 500KHz as it warms up, so 300MHz signal appears as 299.5MHz.Tried the self-calibration, never gets better than that.One was about 80MHz wrong before calibration, also calibrating 500KHz lower...Tested the test signals with another analyzer, both are pretty good, outputting 300.01MHz/299.998MHz.Then a third one reads 10dB lower when cold, fixes itself when warming up, so I hope it's some defective connection, didn't look at it yet.
RCA Electron-Tube MicroMhoMeter WT-100A - Page 1
Forum section: electronics / testgear

author: graybeard
author_rank: Frequent Contributor
timestamp: January 28, 2023, 10:37:58 pm
content: I saw thisRCA Electron-Tube MicroMhoMeter WT-100Aat the W6TRW Swap Meet this morning. The drawer in the front of the unit (bottom of the photo) holds multiple adapters for tubes that fit in the area to the left of the meter.I thought I would share a photo of it here.

author: Tubejunky
author_rank: Newbie
timestamp: March 03, 2023, 10:39:34 pm
content: Hi,Just saw your posting. Do you happen to know if this item was sold? Thanks !Phil.

author: TimFox
author_rank: Super Contributor
timestamp: March 03, 2023, 11:01:10 pm
content: The plug-in unit at the top is for acorn tubes (large socket) and two different "subminiature" tube bases.
Dediprog SF600 ICP header to SO8 pinout - Page 1
Forum section: electronics / testgear

author: newtekuser
author_rank: Frequent Contributor
timestamp: March 03, 2023, 03:14:48 pm
content: Does anyone know what the pinout for the ICP to SO8 test clip should be?I have a dediprog that has been sitting in my drawer for years and now I have an urgent need for it.Could go to my workplace and compare with the unit I have there but would like to save myself the long trip.https://cdn.shopify.com/s/files/1/0076/6092/9091/products/Dediprog-ISP-Testclip-SO8_3_1600x900.png?v=1581411615
Keithley 2000 repair - Page 1
Forum section: electronics / testgear

author: maurit
author_rank: Contributor
timestamp: March 02, 2023, 06:04:48 pm
content: Good morning everyone,I have recovered this Keithley 2000 of the year 2006.The voltages are OK but Q115 (LM339) is cookedThe PCB is also damaged along with some traces.Which procedure do you recommend ?I attach the photo of the damaged part.Thanks

author: Kleinstein
author_rank: Super Contributor
timestamp: March 02, 2023, 06:18:24 pm
content: Chances are there is more damage than the visibly burned part. This are especially JFETs (SOT23) controled by that comparator, but also the LTC1050 and another OP amp at the input.The good thing is that the LM339 is readily available and the chip itself not critical with leakage or fast signals.The burned PCB remains can be somewhat conductive. So one would need to remove it and maybe patch the hole to put in a new part with more flying lead connections. Alternatively one may just isolate the area and have the replacement in dead bug style.It may be worth forst checking the suspect parts near by, as one may want wires directly to these parts.

author: maurit
author_rank: Contributor
timestamp: March 03, 2023, 11:46:30 am
content: Hi Kleinstein,thanks a lot for your valuable advice.I will do what you say !Maurizio
Keysight / Agilent DIY Optical Serial adaptor - Page 1
Forum section: electronics / testgear

author: Fallenrecruit
author_rank: Newbie
timestamp: March 03, 2023, 09:50:09 am
content: Couldn't find any info on here or anywhere to make a optical to serial adaptor for Keysight Handheld Dmm's so I decided to try my hand at making my own and it was surprisingly simple.Currently looks horrible and I have plans to make it better looking and less scuff

author: Fallenrecruit
author_rank: Newbie
timestamp: March 03, 2023, 10:38:31 am
content: Depending on the usb to serial adaptor used I have found the LED is connected between tx to Vcc, and Vcc set to 5v and on another adaptor I have it has to be connected tx to 3v3.If unsure measure voltage between Gnd and TX and that will tell where to connect the led to
Manual for Farnell Wayne Kerr SSA 1000A Spectrum Analyzer needed - Page 1
Forum section: electronics / testgear

author: PDonchev
author_rank: Newbie
timestamp: February 23, 2017, 12:05:04 pm
content: Hi,I bought from ebay Farnell Wayne Kerr SSA 1000A Spectrum Analyzer. I thought I could find the manual on the internet easily, but I have no success.I would be very grateful if someone could give me a scanned copy of the manual (I'll pay, if necessary).p.s.: I filled a manual request form on Wayne Kerr web site, but no response from them.

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: February 23, 2017, 12:23:34 pm
content: Hi,maybe you can contact Farnell support also? The manual seems not to be easily available on the web - as you most likely found out.Try:http://uk.farnell.com/contact-usJoint development of Wayne Kerr and Farnell, assembled by Farnell UK in the 1990s as far as my internet search brought up.The only document I could find is a copy of thespec sheet.Good luck and best regards,Frederik

author: PDonchev
author_rank: Newbie
timestamp: February 23, 2017, 02:59:33 pm
content: Hi,Thanks for the reply. I found that sheet, too. I sent Farnell an inquiry but have no high hopes.Only thing related to the manual which I found is following:QuoteBut I can not find anything useful for "Thetford Electronics".Found this information in an old ebay listing here:http://www.ebay.it/itm/SPECTRUM-Analyzer-Wayne-Kerr-farnell-ssa1000a-/251636434089

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: February 23, 2017, 08:22:34 pm
content: Regarding Telford:click and scroll down hereThey list operating manual AND service manualIf you are not in a hurry, give the people from Wayne Kerr a little time and cue in a new request if no one answered within a week - you never know how busy they are.Odds are, someone will get in touch with you. Also, you could try to reach out to Wayne Kerr Europe.Good luck,Frederik

author: PDonchev
author_rank: Newbie
timestamp: February 23, 2017, 08:52:18 pm
content: Thank you very much!Of course, I can wait ? few days and meanwhile I will send inquiry to TELford Electronics.

author: CJay
author_rank: Super Contributor
timestamp: February 23, 2017, 09:11:52 pm
content: Quote from: frozenfrogz on February 23, 2017, 08:22:34 pmDefinitely worth giving them a little time, they took about a week and a half to get back to me when I sent a manual request but then gave me the full operating and service manual for a 257 modulation meter.

author: on1kzb
author_rank: Newbie
timestamp: February 28, 2023, 11:55:02 am
content: Hello,I asked for the complete user + service manual at Wayne Kerr and I got the manual in just two days !Congratulations to Wayne Kerr Electronics !!!

author: scopeman
author_rank: Frequent Contributor
timestamp: March 03, 2023, 03:01:58 am
content: You might want to post that somewhere so others can find it. I have found that WK is an excellent company and do their best to help the owners of their test gear out whenever they can. Like HP used to!SamW3OHM
Multimeter probe caps - Page 1
Forum section: electronics / testgear

author: SpacedCowboy
author_rank: Frequent Contributor
timestamp: March 03, 2023, 08:19:56 pm
content: Having just stabbed myself (right on a knuckle-joint!) with the exposed red probe below, I am thinking that getting a replacement for the missing cap for the end of the red probe (like on the black one) would be a good idea. Apparently my google-fu is not up to scratch, because I can't find anything that doesn't want to sell me an entire new probe-set.Has anyone any idea where I can get the small grey plastic thing that stops me drawing my own blood when fiddling behind the shelving on which the multimeter is stored ? Many thanks if so

author: TimFox
author_rank: Super Contributor
timestamp: March 03, 2023, 08:31:19 pm
content: Maybe something from this catalog section? Or one of the adjacent sections in their catalog.https://www.mcmaster.com/products/cap-plugs/cap-type~push-on/

author: BillyO
author_rank: Super Contributor
timestamp: March 03, 2023, 09:20:35 pm
content: A bit of insulation stripped off some wire might do the trick until you find something better.

author: Miti
author_rank: Super Contributor
timestamp: March 03, 2023, 09:33:54 pm
content: Look for SMA dust caps. Some are pretty long, they could be exactly what you’re looking for.Or search Ali for Rubber Sleeve Stopper Silicone Glue Insulating End Caps.

author: BeBuLamar
author_rank: Super Contributor
timestamp: March 03, 2023, 09:36:32 pm
content: How often you need the sharp tip probe? If not so often I would remove the probes and have regular probes the won't draw blood.

author: SpacedCowboy
author_rank: Frequent Contributor
timestamp: March 03, 2023, 10:33:00 pm
content: Thanks for the ideas, all - the mention of silicone tips made me think of the silicone tubing I have for the fish tank airline. That has now solved the problem for the time being even if it's not particularly pretty
Seeking used insulation testers...  - Page 1
Forum section: electronics / testgear

author: Deacon
author_rank: Newbie
timestamp: March 03, 2023, 06:09:59 pm
content: Hi all,Seeking used, (battery powered, not hand crank) insulation testers...Specifically, units capable of placing 1kV, 2kV and 5kV DC on an isolated circuit [e.g., PV module strings] to check for leakage to equipment ground.I already have a tif IT990, and a Fluke 1507, but links/resources/recommendations for other products would be appreciated.Thank, D.

author: jonpaul
author_rank: Super Contributor
timestamp: March 03, 2023, 09:21:58 pm
content: Metrawatt from UK, Yokogawa Japan, 500 V AA batts, meter 50k..100M ohmsSeen on eBay occasionallynew £700 in UK.We have several in USA and Paris great units!Jon
tinySA Ultra and total noise source power? - Page 1
Forum section: electronics / testgear

author: Amaruk
author_rank: Contributor
timestamp: March 01, 2023, 07:57:02 pm
content: When using a noise source with a spectrum analyzer one has to think about the total power that goes into the SA as outlined in this excellent video:https://youtu.be/l0xPmkf_EkI?t=82In this example Erik shows that his noise power level is around -30dBm with a resolution bandwidth of 621kHz on a standard tinySA. If we assume the noise source is flat over the entire band to 350MHz (563 times wider than the RBW of 621kHz) we can expect the total power to be NP=-30 + 10*log (563) = -3dBm which is below the maximum limit of 10dBm.However, when it comes to tinySA Ultra the maximum input power is 6dBm and we have two modes of operation. In the normal mode the upper frequency is 800MHz and in the Ultra mode it changes to 3GHz but it can be used higher than that. Thus, what band do we have to integrate the noise power over to figure out if the input mixer in the tinySA Ultra will be overloaded or not? 800MHz? 3GHz? Or even higher?Thanks!

author: Amaruk
author_rank: Contributor
timestamp: March 02, 2023, 06:08:01 pm
content: Update: I cross-posted this question over on the tinySA group and here is the answer I got from Erik:"When not used above 800MHz the input low pass filter removes all power above 800 MHz so the answer is 800 MHzDo not measure noise above 800MHz as the Ultra mode does work well with noise."Excellent answer. Good to know!!