hybridfree/eevblog-posts huggingface dataset:
help repairing Agilent 8133A - Page 1
Forum section: electronics / testgear

author: Xtremexp
author_rank: Regular Contributor
timestamp: September 28, 2023, 07:23:48 pm
content: Hello all,I received Agilent 8133A that I really want to make use of it. It works some sort of but It has some issues. I hope someone in this forum has gone thorough it and help me to resolve these issues.Issue #1:The self test fails with error E008 Frequency counter error. I can see that the pulse output on channel 1 even though this error shows up. I observed that this error only shows in some frequency band. eg. 400MHz, 500 Mhz. in some frequency bands, this error does not shows up. even though it shows error, I can see correct frequency output in channel 1.Issue #2This unit has option 002 (channel 2). the OUTPUT seems dead, I can see some pulses, odd shaped waveform present but nowhere close to square pulse. but negative OUTPUT terminal seems work fine. I am loosing differential capability.That's all issues I can see now. I am using sampling scope with SD-26 head to see these outputs. more issue may be discovered later.Thanks all for reading this.Xtremexp

author: Xtremexp
author_rank: Regular Contributor
timestamp: September 29, 2023, 04:13:52 pm
content: A bit an update on the issues,regarding issue #2, The output pulse seems to be come to look like square after device is kept running for about 5 minute (outputs enabled) so it seems that it is related to temperature issue.But similar to issue#1, some frequencies (400Mhz to 700MHz) seems to have alot of jitter.
HP 8133A Pulse Generator Service Manual - Page 1
Forum section: electronics / testgear

author: EVlab
author_rank: Contributor
timestamp: September 20, 2018, 07:22:36 pm
content: Hi all!I'm looking for a service manual for the HP pulse generator 8133A.Can someone help out?

author: jhenderson0107
author_rank: Regular Contributor
timestamp: September 20, 2018, 07:50:49 pm
content: http://www.ko4bb.com/getsimple/index.php?id=manuals

author: EVlab
author_rank: Contributor
timestamp: September 21, 2018, 11:33:54 am
content: Thank you very much!

author: bson
author_rank: Unknown
timestamp: November 04, 2018, 04:12:58 am
content: Did you ever find a schematic for this instrument?

author: EVlab
author_rank: Contributor
timestamp: November 04, 2018, 08:08:20 pm
content: Yes, it's easy:1) go tohttp://www.ko4bb.com/getsimple/index.php?id=manuals2) type 8133A into search box (it's not listed in the directory)3) have fun (and tell me where to get a cheap 8133A)

author: bson
author_rank: Unknown
timestamp: November 04, 2018, 10:08:02 pm
content: Ah, I looked through the directory but didn't realize there are unlisted documents, including an 8133A service guide! Excellent!

author: bson
author_rank: Unknown
timestamp: November 05, 2018, 03:43:29 am
content: Quote from: EVlab on November 04, 2018, 08:08:20 pmWell, I bought one as a project to see if I can fix it up... No idea what inside the case, or even if it's board complete, but the seller accepted what I thought was a reasonable offer so I'll take a look. This is the one I bought:https://www.ebay.com/itm/232976283208Will try to arrange to go pick it up tomorrow.It COULD be easy to fix. Could also have had boards pilfered and I'm stuck with a bad power supply and broken front panel and nothing else. I guess I'll find out.Without a service manual available I wouldn't have bothered...

author: bson
author_rank: Unknown
timestamp: November 06, 2018, 09:26:39 pm
content: Wow, this is a monster... built like the proverbial brick outhouse. It must weigh 60 lbs at least. So, picked up the 8133A, got home and powered it up to see what happens, if there are any beeps, POST messages, fans come on, whether it responds to GPIB, etc.It comes on. I poke around a bit. It works fine. Checked some low frequency stuff with the scope. Will check 1-3GHz output with the counter. Perhaps it has some problems with certain kinds of outputs or something. Keyboard seems okay, not too snaggly.So I'm leaving it running for a few hours to see if it has any thermal issues. Then will open it up and give it a good cleaning, check caps, etc. I bet it either had a loose connector that resettled during transport (or because I stood it up sideways perhaps) or some other trivial problem.Well, that has worked out alright so far.

author: Xtremexp
author_rank: Regular Contributor
timestamp: September 29, 2023, 04:49:16 pm
content: Hi,Did anyone find the schematic of 8133A?Thanks!
Old Tek 465 with "bent" trace - Page 1
Forum section: electronics / testgear

author: klandingham
author_rank: Newbie
timestamp: September 27, 2023, 12:53:46 pm
content: Hello,I have an old Tek 465 scope that I picked up from a local electronics salvage place quite a few years ago.It has always had a problem with the trace, and I'm finally getting around to trying to fix it, or at least find out the cause.The issue is that regardless of the input, the right side of the trace "bends down", i.e., looking at a no-signal trace from left to right, the beam is flat as expected until about the last 1/3 of the horizontal screen width, then smoothly curves down towards the bottom of the scope.Other than this oddity, the trace seems healthy: plenty of brightness, focuses well, all the controls seem to work as expected, and waveforms seem to display normally (other than the right-side bending).I know very little about this scope, and was wondering if this could be an electronics problem, or some kind of deflection plate damage inside the tube (do these use deflection plates?).Appreciate any ideas, thanks.

author: wasedadoc
author_rank: Super Contributor
timestamp: September 27, 2023, 01:51:20 pm
content: Yes they do use deflection plates. Electrostatic deflection.It is more than 40 years since i last briefly tried a 465 and decided to stick with a 453A. Does it have a horizontal shift control? If yes and you move the trace horizontally does the bend also move or does it stay in the same place on the tube face?

author: tggzzz
author_rank: Super Contributor
timestamp: September 27, 2023, 02:48:08 pm
content: Welcome to the forum.There are several possibilities, ranging from poor PSU to trimpots/trimcaps to damaged CRT.A picture is always useful in such cases.How the "distortion" changes as the controls change can be very useful information, e.g. changes withsweep speed, including *10 magnification and main/delayed sweepmoving a horizontal trace from the bottom of the screen to the top of the screenobserving the cal out signal, and seeing how the trace varies across the screenand anything else you might notice.You will probably benefit by downloading the operation and service manual from any of the usual places (e.g. tekwiki w140.com). Best if you find one that matches your serial number.If there's no obvious CRT damage, the first thing to check is always the PSU rails for DC value and AC ripple. After they are OK, you can move onto looking at the maintenance adjustments in the manual.

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 27, 2023, 05:23:50 pm
content: Isn't the trace rotation potentiometer working?Or it only straightens it partially?I know it's a 475 picture but should be pretty much the same.

author: p.larner
author_rank: Frequent Contributor
timestamp: September 28, 2023, 03:27:12 am
content: mine did same but on both traces,it was a psu cap high esr.
t7 tester - Page 1
Forum section: electronics / testgear

author: p.larner
author_rank: Frequent Contributor
timestamp: September 26, 2023, 10:23:17 pm
content: i have a t7 component tester,its had little use but now when i press the yellow button without anything connected it reads as two diodes,one on pins 1+2 and one on pin 1+3 both with a vf of 1.098v,is it busted or is that normal,as is it still tests caps ok.

author: siealex
author_rank: Regular Contributor
timestamp: September 27, 2023, 11:46:34 pm
content: Check the protection diode set (a small 6-pin chip connected to the inputs). One of its diodes may be shorted.

author: p.larner
author_rank: Frequent Contributor
timestamp: September 28, 2023, 04:38:49 am
content: would you have a pic ?
Siemens Cathode Ray Relay Tester model 109 test teardown 1961 - Page 1
Forum section: electronics / testgear

author: oz2cpu
author_rank: Frequent Contributor
timestamp: September 27, 2023, 06:42:09 pm
content: my latest funny vintage product teardowna CRT based relay timing tester, it is just one of the units I really liked to play withhere you go, have fun look for your self :https://youtu.be/ONzcN1XBlkc
BK 501A Curve Tracer and Siglent 1204xe - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: September 27, 2023, 02:25:44 pm
content: At 70 I decided to learn EE in order to keep my mind sharp. This forum, Kahn Academy and USN are my main resources. THANK YOU!!Anyway, I have the above equipment and have carefully calibrated the scope to the 501A. Saved the setup as a named setup.If I read this right, the 1ma trace reveals a Beta of about 120 (which matches my transistor tester) by reading the smaller graduations as .5 ma/div.I get the same result interpreting the 2ma/div by reading the small graduations as 1.0 ma/div and dividing by 20uA per step.I also get the same Hfe by interpreting the 1ma/div 20uA per step; reading the small grads as .5mA.Am I doing this right? I was a voced student in HS and was taught using the USN course and I am checking my measurement skills.Regards,Dewey
Temperature unit hack for HT118A multimeters - Page 1
Forum section: electronics / testgear

author: Krafte
author_rank: Newbie
timestamp: April 06, 2023, 09:02:54 am
content: I was annoyed that my Kaiweets DMM defaulted to Fahrenheit in the temperature measuring mode, because I don't live in the country which uses that cumbersome unit for temperature.So my plan was to to change that. On YT I saw that there are units out there which default to Celsius, so there must be a way.Luckily, these DMMs store there configuration and calibration data in a separate EEPROM (24C02), similar to that with the DTM0660 chip. It is possible to read and write this EEPROM with simple tools like (CH341B).My research indicated that the HABOTEST units seem to default to Celsius, so I got one and compared the dumps of the EEPROMS.

author: Biken
author_rank: Newbie
timestamp: September 26, 2023, 09:57:23 am
content: There is another way. Simple, in calibration menu.See this:And calibrating - see this:
GW GPQ-3030D help finding info.  - Page 1
Forum section: electronics / testgear

author: rcrook
author_rank: Contributor
timestamp: September 26, 2023, 03:04:32 am
content: Hi,I just picked up this power supply locally off facebreak market place. I can not find anything about this model except the odd ebay listing. I noticed it popped up a couple of times here but there is so scant information I was hoping somoene my know where I can look?Its a GW GPQ-3030D as shown in the image here:Any help would be appreciated.Randall.

author: Wmesquite
author_rank: Newbie
timestamp: September 26, 2023, 06:37:24 am
content: I found the specs from tequipment.net via internet archive. Looks quite decent, has reverse polarity protection too. Lets see if I can figure out how to post a linkhttps://web.archive.org/web/20021216212712/http://www.tequipment.net/InstekGPQ3030D.htmlWade
Hioki Bench Meter calibration procedures, is there any known ? - Page 1
Forum section: electronics / testgear

author: coromonadalix
author_rank: Super Contributor
timestamp: October 04, 2023, 12:28:39 pm
content: I have purchased for a very very cheap price an Hioki 3237, sitting on a shelve for a very long time, "not delivered"While waiting for Hioki .... if they ever answer ?Q: Is there some known CAL procedures from any Hioki meter(s) hand held or Bench ones IE: some CAL commands, read the reference and store it etc ... something to try ...I'll do some tear-down too when i get it, i'm curious to see it's "innards" and show it to the communitythks
SYSTRON DONNER  Model 1138...Nixie tubes....and, HEY;  There's Dave Jones ! - Page 1
Forum section: electronics / testgear

author: RJSV
author_rank: Super Contributor
timestamp: September 26, 2023, 03:22:31 am
content: A recognizable face, as I browsed some history, of SYSTRON DONNER test equipment. Turns out Dave Jones did a Tear-Down (pls see #1138)!The thing has NIXIE TUBE displays, and is described as made in Australia ! Wow, (small world).My work time there was mid-70s, where I performed the various aircraft component 'Qual-Tests' in Sunnyvale, CA.It was the Safety Systems Division, West Berkeley industrial park, and they manufactured excellent and unique FIRE and Overheat detection systems. Infrared sensor technology wasn't strong yet, and the Safety Division systems used DC switches and 28 VDC powered relay and transistor units.The special aspect was the sensing element, consisting of, first, a helium filled tube that got snaked around inside aircraft engine cowlings and in some big trucks. With a bunch of (abnormal) HEAT present, this sensing tube and diaphragm switch would close the sensing circuit relay. That's the OVERHEAT function. But then also, in the same sensing tube would be an industrial 'oddity' which is a 'getter' material, which simply means a metal hydride wire, for absorbing relatively HUGE amounts of hydrogen atoms.Then, to release this hydrogen gas a spot-flame applied can cause a significant rise in pressure, for the system to monitor, in case of fire, or in case of overheat. Honestly, I don't remember how those two fire detection aspects were distinguished. In cases of a sensor element FAULT there was a fault pressure switch to alert the pilots that sensor pressure was lost. These switches were often a Molibdinum dome, approx 2 cm diameter.One benefit, of the moderate tech used, is that less semiconductor (switches) are used, in the often blistering HOT places; engines, elevator motor units off-road construction trucks and ginormous trucks used in mines, etc.Often, the electronics box housing had relays (28 VDC).It was a Cadillac priced deal back then. I suspect that most fire / overheat detection these days uses IR (infra-red) devices.Btw: A very similar method, of holding hydrogen gas, in the atomic in-between areas of a hydride metal is also the basis for some experimental HYDROGEN powered cars.

author: RJSV
author_rank: Super Contributor
timestamp: September 26, 2023, 03:24:50 am
content: Oops, apologies, I meant to put the title as:EEVBLOG #1138(not the freq counter model...)
Seeking Service Data to fix a fault on a Megger BM222 - Page 1
Forum section: electronics / testgear

author: dazz1
author_rank: Frequent Contributor
timestamp: September 25, 2023, 07:24:27 am
content: HiI have a Megger BM222 insulation tester with a fault. It works perfectly on all switch selected functions except for the 1000V insulation test.On the 500V test, a relay can be heard clicking then the displayed voltage/resistance ramps up.On the 1000V test, the relay is not heard and no voltage/resistance is displayed.So either the relay is not being driven to switch, or the relay is not responding to driver signals. The circuit board is far more complex than you might expect. Fault finding could be done, but it would be a lot easier if I had a circuit diagram.
Fluke 88 VDC Inaccurate in Low Ranges - Page 1
Forum section: electronics / testgear

author: Opie91
author_rank: Newbie
timestamp: September 24, 2023, 12:18:18 am
content: Hi All,Have been watching Dave for the last few years and thoroughly enjoy his videos. Recently, I picked up an old Fluke 88 for cheap and found it accurate with one exception: the lower DC voltages do not indicate correctly. Specifically the 4 and 40-volt DC range. Hopefully, someone here can point me in the right direction.Details: This is an automotive meter. The AC Volts, amps AC/DC, ohms, diode check, and DC millivolts all work fine. The DC ranges 400 and 4000 also indicate just fine compared to a power supply. When DC voltage is selected in the 4-volt range with no voltage applied, the meter indicates -OL and -16.16 in the 40-volt range. The negative voltages do not change if the V and COM are connected. If you zero the meter and apply voltage, the meter indicates about 60% at 10VDC. At higher voltages, the gap between applied and indicated increases; at 32 VDC applied, the meter indicates approximately 55% of the applied value.What I have checked:Wafer switch - resistance checked and found to be good. CleanedBoth fuses - good1K fusible resistor - goodResistor Net - checked resistance from the processor chip to the wafer switch. All resistances were found to be within specifications.The board looks nice and clean with no burn marks, cracked solders, or apparent damage.Any help is appreciated.Thanks

author: mwb1100
author_rank: Frequent Contributor
timestamp: September 24, 2023, 08:29:37 pm
content: Is this a Fluke 88V or plain 88 (or some other variation)? If it's an 88V it should still be under warranty.

author: Opie91
author_rank: Newbie
timestamp: September 24, 2023, 11:54:41 pm
content: Hi, thanks for your reply. Straight Fluke88, old timer.

author: bdunham7
author_rank: Super Contributor
timestamp: September 25, 2023, 12:03:14 am
content: I've no idea offhand what would cause that other than a problem with the main ASIC chip, but here's a manual with schematics. Does your's say CAT II on the front?https://res.cloudinary.com/iwh/image/upload/q_auto,g_center/assets/1/26/Documents/Fluke/88/88_doc_3.pdf

author: Opie91
author_rank: Newbie
timestamp: September 25, 2023, 12:26:48 am
content: Hi, thanks input. No, it does not say CAT II.I was afraid that it might be the main chip.Going to bring it to work tomorrow and take a look at some of the caps in the signal conditioning circuit, probably a long shot, but why not.Thanks
Infinium scope 54815A upgrade (please help to find the right post) to 54825A - Page 1
Forum section: electronics / testgear

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 23, 2023, 10:57:33 am
content: Guys, there was somewhere a post that describes how to "upgrade" HP Infinium 5481x scope to higher version. If I remember correctly, there is somewhere a resistor to add or remove on the ACQ board close to the oscillator.However, I don't remember more. Does anyone know, please? I have the unit opened now.

author: Warhawk
author_rank: Frequent Contributor
timestamp: September 23, 2023, 08:29:07 pm
content: Found it, if search engine brings you here, it is post #223 in thread:https://www.eevblog.com/forum/testgear/agilent-54835a-scope-(4-channel-1ghz-4gss)-repair-uphack/200/Short R134 close to the DIP oscillator and run the calibration afterwards.
SDS 1202X-E Auto Power Up - Page 1
Forum section: electronics / testgear

author: Miti
author_rank: Super Contributor
timestamp: September 22, 2023, 04:04:23 pm
content: Hi,We’re using an SDS 1202X-E in an automated test system and I wonder if there is a way to make it power up in full power after a power loss. It is inside a rack and it would simplify operator’s life if he didn’t have to push the power button.Cheers,Miti

author: coromonadalix
author_rank: Super Contributor
timestamp: September 22, 2023, 04:59:01 pm
content: https://www.amazon.com/Remote-Button-Pusher/s?k=Remote+Button+Pusher??for sure you need some solenoid trick or a mechanized trickhttps://www.amazon.com/Ne-fashion-Physical-Keyboard-clicking/dp/B09M8C5XZB/ref=sr_1_39?keywords=Remote+Button+Pusher&qid=1695401828&sr=8-39

author: Miti
author_rank: Super Contributor
timestamp: September 22, 2023, 07:16:28 pm
content: I was thinking more like an option in one of the menus. Like a PC has options in the bios to recover from a power loss in the last state, standby or on.

author: tautech
author_rank: Super Contributor
timestamp: September 22, 2023, 10:52:56 pm
content: Quote from: Miti on September 22, 2023, 07:16:28 pmUnfortunately not for these 2ch X-E models, not even with the latest V1.3.27 firmware.However 4ch X-E do have this feature as do many other models from Siglent.I'll lodge a feature request.

author: Miti
author_rank: Super Contributor
timestamp: September 23, 2023, 01:43:12 am
content: Thanks tautech,Another plus for Rigol, hard power button.

author: tautech
author_rank: Super Contributor
timestamp: September 23, 2023, 03:37:45 am
content: Quote from: Miti on September 23, 2023, 01:43:12 amEach to their own and you might want to check out the Repair board for current threads where mechanical power buttons have failed.....certainly replaced a few in PC's I have had.It seems the similarly priced SDS1104X-U has a POL feature, well according to the manual it has but I need get one out to confirm. Gimme a bit.

author: tautech
author_rank: Super Contributor
timestamp: September 23, 2023, 04:51:04 am
content: Quote from: tautech on September 23, 2023, 03:37:45 amConfirmed, 4ch X-EandX-U have the POL feature.
Hantek 1833C LCR Calibration Memory - Page 1
Forum section: electronics / testgear

author: MLNL Laboratory
author_rank: Newbie
timestamp: September 25, 2023, 03:38:18 pm
content: My Hantek 1833C handheld LCR will go through the open and shorted lead calibration process fine, and zero out with it. But nothing I seem to do will allow it to retain the calibration into memory when it's powered off, it always powers back on showing 7-8 pF. The open lead calibration takes several minutes, which is annoying. I did update to the latest firmware, but no fix. Has anyone else figured this bug out on these?Thanks, Mark KC3PKK

author: Veteran68
author_rank: Frequent Contributor
timestamp: September 26, 2023, 01:56:21 pm
content: I don't know about the high-end lab grade LCR meters, but I've always heard that best practice with these inexpensive LCR meters is that you calibrate before every use or at least at the start of a day/session. There's so many environmental influences involved in making such sensitive measurements (between the meter, the DUT, and the ambient environment) that the calibration likely won't be valid at another time.

author: MLNL Laboratory
author_rank: Newbie
timestamp: September 26, 2023, 06:21:59 pm
content: Thanks for the reply. It's apparent that this particular LCR doesn't save the correction figures to its memory by design. It wouldn't be a huge deal to do it at every power on if it didn't take this meter an eternity to go through it. The other handheld LCR I used was an Applent AT-826, and it would save the corrections to memory as they didn't go off by much day to day. You could just re-calibrate if switching test fixtures/leads or re-calibrate the input at regular intervals. It's likely a price point thing. -Mark KC3PKK-
Anritsu faulty keys? For MG3700A vector signal generator. - Page 1
Forum section: electronics / testgear

author: drew23
author_rank: Contributor
timestamp: September 20, 2023, 09:39:02 am
content: Hi AllI have just bought an Anritsu MG3700A vector signal generator. However, the keys seem either intermittent or don't seem to work at all.I searched the forum for faulty keys on Anritsu gear and found a few people with similar problems but I couldn't find any solution that may have been used.I have yet to get a service manual. I think I can get one once my registration is approved.Regards Drew VK4ZXI

author: jjoonathan
author_rank: Frequent Contributor
timestamp: September 20, 2023, 10:39:34 pm
content: I had a MG3700A with terrible keys! All I had to do was unscrew things until I could get the blister pad out and then I tossed it in the dishwasher, popped it back in, and was good to go.Your dishwasher might be more aggressive than mine so be careful.

author: drew23
author_rank: Contributor
timestamp: September 22, 2023, 05:15:09 am
content: Thanks. I did much the same. Just cleaned the circuit board and keypads and reassembled the instrument. Now it works fine.Drew VK4ZXI
HP 8594Q versus 8594E - Page 1
Forum section: electronics / testgear

author: RikV
author_rank: Regular Contributor
timestamp: September 21, 2023, 07:52:18 pm
content: Is a 8594Q simply a pimped 8594E with DVB options? Or has some functionality of 89594E been sacrificed?The "Q" is called a QAM-analyzers whereas the "E" is simply called RF-analyzer???
R&S RTM 1054 Reparing - Page 1
Forum section: electronics / testgear

author: pcbcrew
author_rank: Contributor
timestamp: September 20, 2023, 07:14:19 pm
content: Hi engineers.I found some faulty RTM1054 oscilloscopes in second-hand market.As these faulty machine prices are affordable for me, I'm thinking to buy one and try to repair for my own use.The first one I found is having NVM error.Initialization of non-volatile memory failed.Is this something that can be fixed by replacing NVMe chip?I checked pricing of repair service of Rhode and Schwarz, but it was too much for me.Here are the screenshots of error message from the seller.

author: pcbcrew
author_rank: Contributor
timestamp: September 21, 2023, 07:30:49 am
content: Here's another RTM1054 with different error message.It can show waveforms behind the error message popup.But it automatically goes to power-off in ~10 minutes.Will this machine easier to repair than the first one?

author: nctnico
author_rank: Super Contributor
timestamp: September 21, 2023, 10:35:13 am
content: If it has a fan, see if the fan is running and whether it has a tacho signal. It is not uncommon for test equipment to shut off automatically if the fan isn't running (or the tacho signal is missing).
Anyone here familiar with a Seica Pilot VX flying probe system? - Page 1
Forum section: electronics / testgear

author: PeterFW
author_rank: Frequent Contributor
timestamp: September 23, 2023, 11:51:45 pm
content: Recently i had the oportunity to work on a Seica Pilot VX.I had a look at the userinterface and a chance to play with it a little bit and the more i think about it the more something bugs me about.And i just remembered why it looked so familiar...That is a spice window in the schematic view, right?Am i right in assuming that this marvellous machine performs a complete circuit simulation on the backend which it then uses to perform offset calculations/compensations on the in circuit test?If not, can someone expain this to me like a toddler?Like, i get the motion stage, i can use all the usual test equipment it has in it on its own.By the way, those linear magnet actuators on the probe heads are super cute!I got a 3D printer, can do embedded C, CAD, CAM, 0201 hand soldering... all been there.I know how a needle test bed works and how to design one, all good.But i can not wrap my head around this, it looks like magic and it makes me feel stupid.
Siglent SDM3055 to SDM3055-SC Conversion - Page 1
Forum section: electronics / testgear

author: Matt Coates
author_rank: Contributor
timestamp: September 19, 2023, 01:38:24 pm
content: Has anyone had success converting the SDM3055 to the SDM3055-SC?It seems strange that you can't buy the SC1016 and insert it into a regular SDM3055.As it seems you can't buy the SC1016 on its own, has anyone reversed engineered this (schematic or gerbers)?Any help much appreciated.

author: Kleinstein
author_rank: Super Contributor
timestamp: September 19, 2023, 04:33:38 pm
content: In another thread there were pictures of the SC and non SC version. The normal version has a few part on the main PCB not populated and the cables to the connector PCB are soldered directly to the main PCB. So there is no easy conversion and this would need soldering to the main PCB.

author: tautech
author_rank: Super Contributor
timestamp: September 19, 2023, 08:00:59 pm
content: Quote from: Matt Coates on September 19, 2023, 01:38:24 pmNot worth the effort when getting a SDM30**-SC model initially is cheaper.QuoteSC1016 is available as a spare part however a non SC model does not contain the supporting HW.Suggest you start your studies here:https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg5020645/#msg5020645
Anritsu MG3700A vector signal generator hacks for IQproducer options - Page 1
Forum section: electronics / testgear

author: drew23
author_rank: Contributor
timestamp: September 19, 2023, 06:11:20 am
content: Hi AllJust bought an Anritsu MG3700A vector signal generator. I was wondering if there are any hacks to access the IQproducer options?Any other hints or thoughts for this device?Regards Drew VK4ZXI
Marconi TF 2023 Signal generator - Page 1
Forum section: electronics / testgear

author: Wendy Moss
author_rank: Newbie
timestamp: September 18, 2023, 09:11:40 pm
content: Hi Peeps. Grumpydoc posted his modifications to the TF 2023 Signal generator. I purchased the Winstar SC15029 display fitted and made the DC supply module as directed. However, Grumpydocs photo of the 20 Pin IDE ribbon to 20 pin single in line connector shows one or two wires crossed over, it is not clear from an enlarged photo how and why. I soldered pin for pin as in 1 to 1 2 to 2 etc, leaving pin / wire 9 open. as pin 9 on the 20 pin in line is missing.Also I have looked in the Settings of the manual, and I cannot find a code to set the LCD Contrast. It has been mentioned.In the Winstar data sheet it also shows a 20K Pot attached to Wire 9 "VO". Suggesting this wire 9 should be connected but the bottom of the preset is to VEE ??Please can some forum member advise.
Dioda 153-0057-00 - Page 1
Forum section: electronics / testgear

author: frantisek
author_rank: Regular Contributor
timestamp: September 13, 2023, 01:02:29 pm
content: Hello colleagues and please advise me. What to replace the diodes 153-0057-00 used among others in taktronix multimeters? The diode has a stated closing current of only 50! pA for Vr 10V. Thank you!

author: frantisek
author_rank: Regular Contributor
timestamp: September 20, 2023, 05:34:23 pm
content: Solved. Used a different type of diodes. They work perfectly.
Budget RF audio generator - Page 1
Forum section: electronics / testgear

author: RiRaRi
author_rank: Regular Contributor
timestamp: September 17, 2023, 10:57:59 pm
content: Hi. I am looking for cheap RF audio gen for tuning radios. I would like the ability to produce both AM and FM frequency. Any reccomendation is welcome.

author: Halcyon
author_rank: Unknown
timestamp: September 17, 2023, 11:32:29 pm
content: Duplicate thread.
Hantek DPO7000 series - Page 1
Forum section: electronics / testgear

author: Bit2023
author_rank: Newbie
timestamp: August 04, 2023, 05:31:13 pm
content: Hi all, has anyone tested these new(?) models?for instance the DPO7104E, can this model be upgraded by SW to a full 500MHz like the DPO7504E?http://www.hantek.com/products/detail/18200

author: thm_w
author_rank: Super Contributor
timestamp: August 05, 2023, 12:12:23 am
content: I don't think anyone has one. The name confusion with the TEK DPO7000 probably doesn't help searches though..http://www.hantek.com/uploadpic/hantek/image/20230529/20230529135728_147908640.jpghttp://www.hantek.com/uploadpic/hantek/image/20230529/20230529135749_2076827329.jpgLooks cool, has a bunch of USB-C ports on the front. They must use one of those for the logic analyzer input maybe.RS232 and LAN on the same instrument? lol.Quote

author: skander36
author_rank: Frequent Contributor
timestamp: September 08, 2023, 08:25:36 am
content: UI reminds me of Rigol 5K.It is a 500 MHz platform but with 2 GSp/s. That means with all 4 channels will be 500 MSp/s.At 2399 for 350MHz version I don't think they sell too many.

author: Domitronic
author_rank: Regular Contributor
timestamp: September 08, 2023, 09:37:30 am
content: Quote from: skander36 on September 08, 2023, 08:25:36 amNope, it is 1 GS/s when all channels active according to datasheet:http://hantek.com/uploadpic/hantek/files/20230608/DPO7000%20DataManual.pdfThe 4 connectors in the front which look like USB-C are all for logic inputs. Here is the manual:http://hantek.com/uploadpic/hantek/files/20230608/DPO7000%20UserManual.pdfLooks like Hantek wants to compete in the range of the SDS2000X plus in my opinion.

author: skander36
author_rank: Frequent Contributor
timestamp: September 08, 2023, 10:51:30 am
content: Quote from: Domitronic on September 08, 2023, 09:37:30 amThis is good, means that is using two ADC's. And I see 2 GSa memory with 512 per channel (4ch), Bode plot. But still expensive for the brand ...

author: skander36
author_rank: Frequent Contributor
timestamp: September 16, 2023, 10:03:05 pm
content: A channel with videos presentations of this scope.https://www.youtube.com/@eediscusstechnology8742

author: Serg65536
author_rank: Regular Contributor
timestamp: September 17, 2023, 02:42:19 am
content: https://youtube.com/watch?v=9Kn7xXUa8Z4Why frame rate is so slow on 5ns/div 20kpts without trigger?

author: Serg65536
author_rank: Regular Contributor
timestamp: September 17, 2023, 02:46:27 am
content: Quote from: skander36 on September 08, 2023, 08:25:36 amI can't find prices, please, give the link.

author: skander36
author_rank: Frequent Contributor
timestamp: September 17, 2023, 11:32:33 am
content: Quote from: Serg65536 on September 17, 2023, 02:46:27 amhttps://www.alibaba.com/product-detail/Hantek-DPO7354E-350MHz-Four-Channel-Handheld_62348342894.html
TDS7404 Software Not Launching, "A." Code - Page 1
Forum section: electronics / testgear

author: Charsmud
author_rank: Newbie
timestamp: September 15, 2023, 09:55:18 pm
content: Good afternoon. I have a TDS7404 that recently stopped loading the oscilloscope software. The windows install still functions properly, but the software hangs on the initial screen that appears on first launch. I opened up the machine and saw that it cycles through ".8 4 5 6 7 8 9 A A.", and hangs on "A.". According to the service manual we found online, that indicates the NVRAM ones test failed, but I'm not sure how I should solve that. I saw some people solved this issue (with different cycle of code) by replacing the battery on the Power PC board, but I'm not sure if that's causing our different error code. Do you have any suggestions of how to fix this? We tried to get at the PowerPC board but the board on top for some reason wasn't coming out, so we couldn't access the board below.
External Clock Input board for HP/Agilent 332xx series - Page 1
Forum section: electronics / testgear

author: vasa1958
author_rank: Newbie
timestamp: May 23, 2019, 09:22:32 pm
content: Hi fellows,Some years ago I made a external clock input board for my HP/Agilent 33220A.I offer two remaining PCB’s few weeks ago on HP-Agilent-Keysight-equipment groups.io and they immediately gone.My question is, whether there is any more interest in this or to archive this project?On my side, to make it cost effective, more than 7 orders are required. The price would be 99USD including the shipping cost to US or Europe and will take about 4-5 weeks to build-up (holiday season coming…).Design are based on original Agilent 33220-80001 (33220-66503) board and compatible with 332xx series of function / arbitrary waveform generators, but slightly modified.Input impedance is 50ohm AC coupled, DC isolated from instrument housing and sensitivity of -13 +/-2 dBm. Input level for optimal jitter/phase noise is between 0 and 20dBm. Board is only 10MHz input, no loop back output!Picture of board installed in my 33220a is attached. New revision will have MCL or Coilcraft 1:1 input isolation transformer.To save group bandwidth, please mail to vasa1958@gmail.comRegards,Milan

author: neuschs
author_rank: Contributor
timestamp: July 20, 2023, 12:41:55 pm
content: Hi,Would you open source your design ?GreetingsSebastian

author: artag
author_rank: Super Contributor
timestamp: July 20, 2023, 02:04:59 pm
content: Could it be made to work on a 33120A ?

author: Runco990
author_rank: Frequent Contributor
timestamp: September 18, 2023, 04:27:42 pm
content: @Milan, I would be VERY interested in one of these boards. I need to lock ALL my gear to my Rubidium clock.@Artag, there are currently 2 boards for the 33120A on ebay! I almost jumped out of my chair, but those do NOT work with the 33220A
Does Rigol-MSO8000 Series have bode test functionality? - Page 1
Forum section: electronics / testgear

author: strahd_von_zarovich
author_rank: Contributor
timestamp: September 15, 2023, 01:49:28 pm
content: Hello everyone,I have a Rigol-MSO8064 oscilloscope. I have all the options except bandwidth upgrade.I know that MSO5000 series have Bode function, but I couldn't find how to do that on my oscilloscope. Both MSO5000 and MSO8000 has function generators.I read the datasheet and usermanuel and I couldn't find any information.I am getting suspicious that my oscilloscope doesn't have the Bode test functionality despite the fact that it has function generator and it is superior model.Is there anyone who use this series or have any idea?Thanks in advance.

author: skander36
author_rank: Frequent Contributor
timestamp: September 15, 2023, 02:21:43 pm
content: It doesn't show up in the user manual.Are you using the last version of Fw. ?On MSO 5000 this was a later adition.Can you post a picture with the start menu icons?

author: strahd_von_zarovich
author_rank: Contributor
timestamp: September 15, 2023, 03:38:36 pm
content: I installed the latest version. Looks like It doesn't have it

author: skander36
author_rank: Frequent Contributor
timestamp: September 15, 2023, 03:42:26 pm
content: Strange.You have to ask Rigol about.For sure Bode plot is not a paid option.

author: tv84
author_rank: Super Contributor
timestamp: September 15, 2023, 03:44:50 pm
content: Quote from: strahd_von_zarovich on September 15, 2023, 03:38:36 pmI can trade for my MSO5000, if you want...

author: Fungus
author_rank: Super Contributor
timestamp: September 15, 2023, 05:10:13 pm
content: Quote from: tv84 on September 15, 2023, 03:44:50 pmI'll buy a brand new MSO5000 to trade for - still in box with full warranty!
RIGOL DL3021 HACK HELP? - Page 1
Forum section: electronics / testgear

author: Crambone
author_rank: Frequent Contributor
timestamp: September 11, 2023, 07:23:21 pm
content: I’m sorry I know there is a post with a ton of info on this but the more I read the confused I get.I’ve acquired a DL3021 and would like to hack/ upgrade. I’m not the best with computers and scripts so I was hoping someone might have a step by step instruction?Andrew

author: tautech
author_rank: Super Contributor
timestamp: September 11, 2023, 07:31:17 pm
content: SIGLENT DL3021Can't find such a device.

author: electr_peter
author_rank: Unknown
timestamp: September 11, 2023, 07:42:27 pm
content: Presuming you meanRigolDL3021 DC load, follow instructions in this postdl3021-to-dl3031-conversion-discussionRigol DL3000 electronic load series can be modified easily (all models have same HW).

author: Crambone
author_rank: Frequent Contributor
timestamp: September 13, 2023, 03:22:41 am
content: Yes sorry and thank you!
UNI-T UDP3305C Good programmable PSU? - Page 1
Forum section: electronics / testgear

author: RiRaRi
author_rank: Regular Contributor
timestamp: September 13, 2023, 04:56:46 pm
content: Hi. I am looking for not-so-expensive multiple output programmable PSU. I was looking at UNI-T UDP3305C and Siglent SPD3303X-E. I would buy Siglent since i think it has less noise and better brand but i like UNI-T because it has total of 10A while Siglent has 6.4A. Does anyone have any experience with these two or any other reccomendation is welcomed.
HP 8596E spectrum analyzer options - Page 1
Forum section: electronics / testgear

author: RikV
author_rank: Regular Contributor
timestamp: September 16, 2023, 08:35:50 am
content: I am following an auction for a 8596E spectrum analyzer. Allthough the "base" device is already an excellent piec of equipment, this one comes with some options.For two of them I cannot find any documentation: opt012 and opt112. They belong toghetter: Source for DECT receiver test and DECT demodulator. I know what DECT is (was) but that is of no direct use to me. I wonder if opt12 may be used as a Tracking Generator (opt010)? Anyone who could share the user's guide on opt012-112?

author: Stray Electron
author_rank: Super Contributor
timestamp: September 16, 2023, 06:03:46 pm
content: Keysight's US website doesn't have much about the 8596E but it appears that the tracking generator is built in and comes as a standard feature.https://www.keysight.com/us/en/product/8596E/portable-spectrum-analyzer-9-khz-to-128-ghz.htmlBased on the catalog description of that series of SAs of Keysight's Canadian website, The Tracking Generator is optional in some models (such as the 8590D and 8591E) but standard in the 8596E.https://www.keysight.com/ca/en/assets/9018-06719/technical-specifications/9018-06719.pdf
Best Digital handheld scope under 200? - Page 1
Forum section: electronics / testgear

author: gtalento
author_rank: Newbie
timestamp: September 12, 2023, 06:03:01 am
content: Hi everyone!New here, getting into car electronics, I'm looking for a handheld digital scope under 200 dollars.Sadly can't really spend much more at the moment, also local prices here are crazy and availability is low. And anything imported over 200 usd is subject to crazy taxes (60%+) so that also limits my possibilities.After reading a lot I was about to settle for the OWON HD272s but wanted to know if there are any better options out there.Also saw the FNIRSI DPOX180H, the digital phosphor and higher sample rate looks nice but read that fnirsis have a lot of bugs, and straight out lie on the specs. There's also the DSO2512G but it appears to be sold rebranded under tons of different names and haven't found much info on it compared to the others. Regarding the Hantek it seems the owon is straight up better but maybe I'm wrong.Any help is greatly appreciated!

author: xtech
author_rank: Regular Contributor
timestamp: September 12, 2023, 06:39:36 am
content: What about Hantek 2C42? Don't expect too much from UI but it is acceptable for that money.

author: all_repair
author_rank: Frequent Contributor
timestamp: September 12, 2023, 06:48:28 am
content: check up ZeeWeii.

author: Aldo22
author_rank: Super Contributor
timestamp: September 12, 2023, 06:50:32 am
content: Do you want an oscilloscope with multimeter included (scopemeter) like the OWON HD272s, or just a handheld oscilloscope?The OWON HD272s costs twice as much as e.g. theDSO2512G, which is a pure oscilloscope (+ SigGen).As scopemeter there is also the newZeeweii DSO3D12.The OWON HD272s is perhaps a little better in certain respects, but also more expensive.The Fnirsi DPOX180H is probably not that bad (I don't have one), but it has a few details that I don't like.
looking for reference manual to identify old HP ROM 1818 2173A (2770C) - Page 1
Forum section: electronics / testgear

author: jorgeh
author_rank: Regular Contributor
timestamp: September 11, 2023, 09:37:52 am
content: HiI was hoping if someone has an old HP spare parts guide. it came from an Hewlett Packard 34721B BCD Module.I found the equivalent for the display IC 1990 0408 and decade counter. but i ahvent found any reference on internet related to 1818 2173Aif anyone has an idea what would be the equivalent. it would be much preciated.

author: martinr33
author_rank: Frequent Contributor
timestamp: September 12, 2023, 03:02:04 am
content: That family of units appears to be pre-microprocessor. Those date codes are from the 1970s, before there was a plan for the 1980s.This site has some useful information.https://www.barbouri.com/2022/07/11/hewlett-packard-34721b-bcd-module/The device may be some form of masked ROM.You can probably replace it by wiring in a 2716. For that era, it is likely a 3 rail device. Or you may need to add a second device to boost the data width - 28 pins seems like a lot.If someone has schematics, that would be useful.
Wrong AC Reading on UNI-T UT61B - Page 1
Forum section: electronics / testgear

author: Yovan
author_rank: Newbie
timestamp: September 13, 2023, 12:39:23 pm
content: Hi all, I am experiencing a wrong reading for all AC voltages, it seems that the read voltage is 1/2 that what it should be . I guess that it is using only one cycle of the AC voltage . Does anyone know which component can cause this issue ?

author: GigaJoe
author_rank: Frequent Contributor
timestamp: September 13, 2023, 01:14:07 pm
content: its a one chip does everything kind of device. if it not a protection diodes on input you can look at ... then chip ...avoid a mistake to measure anything inside by the same unit ( as itself) it may die

author: Yovan
author_rank: Newbie
timestamp: September 14, 2023, 12:47:05 pm
content: GigaJoe,Do you have any idea which protection diode ?
Good budget programmable low noise PSU - Page 1
Forum section: electronics / testgear

author: RiRaRi
author_rank: Regular Contributor
timestamp: September 11, 2023, 03:43:35 pm
content: Hello. What is good two output low noise PSU that can produce 30V and that has enough current to power vintage solid state audio gear like radio receivers, boombox, turntables, amplifiers etc? How much in general current solid state radios, amp and similar audio gear spends?
Agilent 8757D Scalar Network Analyzer and 11664x family detectors - Page 1
Forum section: electronics / testgear

author: ytterligare
author_rank: Regular Contributor
timestamp: September 11, 2023, 09:26:00 am
content: Hello, anyone knows if the 11664A/C/E detectors are compatible with the Agilent 8757D Scalar Network Analyzer ? Anyone using them toghether ?This datasheet here says they are compatible with 8757 without specifying the analyzer model (C/D/E):https://www.rftesolutions.com/pdf/coaxial_detectors/85025E--Specifications_Sheet.pdfMany thanksAndrea
Rigol MSO5000 oscilloscope, Siglent SDG 2042X plus GPSDO - Page 1
Forum section: electronics / testgear

author: m_AN_g_LE_r
author_rank: Newbie
timestamp: September 09, 2023, 02:20:11 pm
content: Is there any way to use a GPSDO to synchronise my oscilloscope and function generator? I can pass the GPSDO into the signal generator reference in, but as the Rigol oscilloscope does not have a reference input, I am trying to find out if I could input the reference signal into a channel and use it as a clock source. I don't think it's possible, but I'm sure you can confirm it for me.

author: nctnico
author_rank: Super Contributor
timestamp: September 09, 2023, 03:47:07 pm
content: The trigger synchronises the various signals so unless you are making really long acquisitions (time wise), the internal oscillator will be just fine. But last time I checked, the SDG2000X series doesn't lock to an external clock source properly anyway. You'll need a far better generator if you want to do high precission time / frequency measurements.

author: NoisyBoy
author_rank: Frequent Contributor
timestamp: September 09, 2023, 09:48:26 pm
content: I agree with nctnico’s comments. I ran my whole lab off GPSDO with a distribution amp, in my case, 2042X actually does a decent job in output stability when I measure it with a dedicated counter.For high precision time/frequency measurement, I would not bother with a low end scope like a MSO5000, it simply does not have enough precision for the job, and lacks an external time base input. I tend to use my universal counter, HP 6332A for low frequency, and the 53131A for higher frequency as it goes to 3GHz.

author: tautech
author_rank: Super Contributor
timestamp: September 09, 2023, 09:55:27 pm
content: Quote from: nctnico on September 09, 2023, 03:47:07 pmSee here:https://www.eevblog.com/forum/testgear/the-siglent-sdg2042x-thread/msg5043091/#msg5043091

author: nctnico
author_rank: Super Contributor
timestamp: September 09, 2023, 10:09:42 pm
content: Quote from: tautech on September 09, 2023, 09:55:27 pmYou are missing the point. Being synchronised to an external clock means that the output frequency doesn't drift at all in respect to the external clock. The SDG2000X series doesn't do that. Siglent has attempted some fixes and it seems to be worse instead of better judging from the tests others have performed after I have reported my findings.
Budget PSU suitable for scoping - Page 1
Forum section: electronics / testgear

author: RiRaRi
author_rank: Regular Contributor
timestamp: September 09, 2023, 03:55:07 pm
content: Hello. I need good power supply that has low noise so it is good to use when scoping/probing the circuit?Also do i need the PSU if i have signal generator in the scope?If the PSU will be used to power the circuit for tracing the problem