hybridfree/eevblog-posts huggingface dataset:
Rigol DHO800 DHO900 Custom Decoders - Page 1
Forum section: electronics / testgear

author: lukilukeskywalker
author_rank: Newbie
timestamp: June 08, 2024, 09:36:29 pm
content: Hi, new user here,I am a new proud owner of a DHO924s and I was looking for its decoding capabilitiesI was wondering if custom decoders can be installed and made by us like the High level decoder scripts you can write for Saleae LAs and Sigrok LAsI am currently interested in writing a SENT decoder for a project I am working in, I have already modified and written a HLA decoder for the Saleae Software that lets me see what a chip is sendingIn case it is not possible, can the point stream of the oscilloscope be converted to something (a capture) that the Sigrok or Saleae software can see?Thanks in advance for your help

author: TomKatt
author_rank: Frequent Contributor
timestamp: June 09, 2024, 02:03:05 am
content: I don’t have a Rigol scope, but I do not believe that the DHO800 series provides the ability to create custom decoding scripts at that high level. I’m not sure what exporting abilities this scope offers that you could import into Sigrok - I note that the DHO800 series is not listed in the Sigrok hardware page, so I wouldn’t expect that to be an option.Personally, I’ve always preferred a dedicated LA to the ones built into scopes for high level decoding. Perhaps even a Sigrok capable dedicated USB LA would be a better solution for you in this case. If you do much serial decoding work, I’ve found the DSlogic Plus USB LA’s to work very well - they are a big step above the cheap LA boxes but significantly less expensive than Saleae units.

author: mrisco
author_rank: Regular Contributor
timestamp: June 24, 2024, 01:12:15 am
content: You can use Python to implement custom decoders; Using pyVisa it is possible to retrieve the channel data information and then process it.

author: Fungus
author_rank: Super Contributor
timestamp: June 24, 2024, 01:26:15 am
content: The 'scopes are very hackable.People have added things like fancy FFTs in a separate window. Maybe other decoders are possible using similar techniques.It's not as simple as uploading a Python script onto the 'scope though, and it's probably easier to hack Sigrock into working with the DHO800/GHO900.

author: fredo_
author_rank: Regular Contributor
timestamp: June 24, 2024, 10:39:24 pm
content: Quote from: Fungus on June 24, 2024, 01:26:15 amThere seems to be a work in progress for a Sigrok DHO800/900 driver update (even though it shows no activity since January...) :https://github.com/sigrokproject/libsigrok/pull/229

author: fredo_
author_rank: Regular Contributor
timestamp: June 27, 2024, 05:03:59 pm
content: Quote from: fredo_ on June 24, 2024, 10:39:24 pmFYI, I just starteda new topic about new hardware support for Sigrok (including Rigol DHO800/900 models).
Any info on a GenRad 1925 "mulitfilter" - Page 1
Forum section: electronics / testgear

author: joew
author_rank: Newbie
timestamp: June 27, 2024, 11:12:19 pm
content: Howdy!I found this beast at a recent ham fest and decided I could not live without it. This appears to be that rare spot where real science crosses over to audio. On the face of it, the machine seems to be a downright funky 1/3 octive EQ with kind of an interesting display. Rather than the common sliders, it has knurled things for your thumb to move, and they are in turn connected to mechanical moving dots like little old time radio dials. It also has significantly deeper boots and cut ranges, +/- 25db, and as far as I have been able to tell, it has the outputs from the filters broken out individually, as well as a summation output on the back. I found some info on the net, but I would to get my hands on a manual. I found one but the site cert has expired and he wants 50 bucks for it. Or if you have ever met up with one of these in real life I would be interested in hearing about it. It is just a marvel of GR craftsmanship.

author: Vgkid
author_rank: Super Contributor
timestamp: June 29, 2024, 04:35:38 am
content: You could try sending an E-mail to IET labs, it is worth a chance.

author: The Soulman
author_rank: Super Contributor
timestamp: June 29, 2024, 12:02:19 pm
content: Did you see the original catalog? It has some info.It's on page 67:http://www.ietlabs.com/pdf/GR_Catalog/GenRad_Cat-1973.pdf

author: Circlotron
author_rank: Super Contributor
timestamp: June 29, 2024, 12:31:20 pm
content: https://www.worldradiohistory.com/Archive-Company-Publications/Archive-General-Radio/GR%20Exp%201968_10.pdfhttps://www.worldradiohistory.com/Archive-Company-Publications/Archive-General-Radio/GR%20Exp%201969_05.pdf

author: TimFox
author_rank: Super Contributor
timestamp: June 29, 2024, 03:42:34 pm
content: I like the front-panel key lock to stop unauthorized changes in the filter settings.I remember other students visiting my university lab (at around the time of this catalog) who would be attracted to the thumbwheels as something to twiddle.
Fluke 45- no negative DC measurements above 3V - Page 1
Forum section: electronics / testgear

author: David Aurora
author_rank: Frequent Contributor
timestamp: April 16, 2024, 02:44:12 am
content: Might be a while before I get a chance to dive in and troubleshoot properly so just thought I'd check if someone has come across the same problem before and can save me the effort.I got shafted on a Fluke 45 on eBay recently and at first thought the damage was just cosmetic as things appeared to work OK at first. Fast forward a couple weeks and I'm measuring something and flip from slow to fast rate and the measurement drops to zero. Flip back to slow and my measurement is back. Flip to medium- 0V again.I noticed though that at voltages below about 3V it DOES work for negative inputs.Anyone come across this before?

author: Jory E
author_rank: Newbie
timestamp: June 24, 2024, 05:05:13 pm
content: I have a unit with the same defect but was not able to find any glaring fault within the unit. I am doubtful I'll ever return to troubleshoot this one though..

author: stj
author_rank: Super Contributor
timestamp: June 25, 2024, 02:17:42 pm
content: sevice manual in this thread,https://www.eevblog.com/forum/repair/fluke-45-repair/

author: David Aurora
author_rank: Frequent Contributor
timestamp: June 27, 2024, 02:16:15 am
content: Thanks guys, yeah I haven't gotten around to digging any deeper yet. Kind of just accepted I got ripped off and can't really be assed spending a lot of time on it, it'll most likely just stay in the modes that work for the rest of it's life

author: J-R
author_rank: Super Contributor
timestamp: June 27, 2024, 04:44:50 am
content: Service manual link in that thread is dead. Attaching a copy.The troubleshooting section is pretty good. I'd suggest at least going as far as you can to start with.Also, maybe this fact will help narrow down the fault:"In the medium and fast measurement rates, the a/d converter uses one of two ranges: ±300 mV and ±3 V full scale.In the slow rate, the a/d converter uses one of two additional ranges (±100 mV and ±1000 mV full scale), for a total of four ranges."So if you can isolate the problem to specific functions and circuit paths, it may more quickly direct you to a faulty component.

author: robert.rozee
author_rank: Frequent Contributor
timestamp: June 27, 2024, 05:38:45 am
content: hi David,it may be a long-shot, but i have read of folks having problems with strange behavior when the Fluke 45's 5v rail goes out of tolerance - in particular relays not switching when they should. i believe there are a couple of fixed-value trim resistors that can be added/removed to adjust the 5v rail. it could be worthwhile, at the least, checking that the 5v rail is indeed spot on.cheers,rob :-)
Rigol Supporting Legs - Page 1
Forum section: electronics / testgear

author: boful
author_rank: Contributor
timestamp: June 27, 2024, 12:56:27 am
content: Greetings ...Rigol 2000 series scope. My daily driver.Bumbled and broke one of the supporting legs. Have looks online, and this fourm,and surprised, could not be found a replacment part. Also the service manualdoes not list a part number etc. I must be the only person dumb enoughto break a leg :-)Without having to call Rigol, anybody know of a way to get a replacment leg ?Thanks....

author: thm_w
author_rank: Super Contributor
timestamp: June 27, 2024, 01:18:05 am
content: I see some for the 1000, can't remember if its the same on the 2000:https://www.thingiverse.com/thing:4297445https://www.thingiverse.com/thing:2631451

author: boful
author_rank: Contributor
timestamp: June 27, 2024, 01:56:28 am
content: Thanks so much.The dimensions, and picture seems perfect, will get a some printed and see if they work !

author: MarkF
author_rank: Super Contributor
timestamp: June 27, 2024, 02:19:08 am
content: I made new feet for my DS1000Z scope. Don't know if they would work for yours.https://www.eevblog.com/forum/testgear/replacement-knobs-feet-and-fittings-for-test-equipment/msg3909776/#msg3909776If it doesn't, I could tweak it for your dimensions. Let me know.
Rigol dg1022z clock accuracy and stability measured using LBE-1420 GPSdo - Page 1
Forum section: electronics / testgear

author: bb1
author_rank: Regular Contributor
timestamp: June 27, 2024, 12:45:24 am
content: Rigol dg1022z is waveform generator and frequency counter.Both the generator and the frequency counter use the same clock.Rigol datasheet specifies the clock accuracy as "±1ppm of the settings, 18℃ to 28℃".The actual accuracy can be measured by providing GPSdo 10MHz signal to the input of the dg1022z counter.In my case the measurement result was 10.0000030 MHz, which means 0.3 ppm error.It also was noticed that this error remains unchanged in time.This means that it can be removed by calibration.Rigol provides dg1022z calibration instructions in the file "DG1000Z Calibration Manual.pdf".These instructions suggest using more accurate counter to make adjustments to dg1022z clock.Instead I compared dg1022z output frequency with the 10 MHz GPSdo output on an oscilloscope screen.I used dg1022z up and down soft calibration buttons to stop dg1022z waveform moving relative to GPSdo waveform.The scope screenshot of the result is shown on the attached rscope_10secPersist_LEO_dg10227_10ns.png.GPSdo 10 Mhz signal is shown by yellow trace, and dg1022z waveform is shown by blue.The scope persistance was set to 10 sec.We see that the dg1022z signal moved by less than 10 ns in 10 sec,which means dg1022z calibrated clock is accurate within about 1 part per billion (1ppb).Longer time stability can be checked by using PC to capture array of the dg1022z counter values with 10 Mhz input from the GPSdo.As dg1022z counter makes most accurate frequency measurements with Gate Time of 10.73 sec, the PC captured the counted frequency each 12 seconds,which means 300 measuremnts per hour. Two attached plots show measured frequency values as a function of time.Frequency values on the plots are shown by filled circles. The connecting line is just an eye aid.First hour measurements starting with cold dg1022z show measured frequency drop by about 8 ppb atfreqDrift_firstHour.png with maximum error of about 9 ppb.Frequency drift for the next 2 hours, visible at freqDrift_secondAndThirsHour.png, shows dg1022z clock frequency fluctuations of about +-1 ppb.Here the average frequency error is less than 1 ppb.Using more data, I would estimate the dg1022z clock uncertainty to be within 10 ppb.

author: bb1
author_rank: Regular Contributor
timestamp: June 27, 2024, 12:46:19 am
content: scope screenshot
Help to identify a strange UNI-T ADC chip - Page 1
Forum section: electronics / testgear

author: siealex
author_rank: Regular Contributor
timestamp: June 26, 2024, 07:55:51 pm
content: Today I found a strange UNI-T multimeter on our local auction. Externally it looks like an ordinary UT-33C (the old 7106 based version, not 33C+).However:1. Overload is displayed "OL" with or without the negative sign, not "1", as on a typical 7106.2. The HOLD switch is a simple pushbutton connected to the chip, not a 6-pin switch with two fixed positions. Hold is activated (and deactivated) by a short pulse, not by a constant level, as on AME7106.3. Backlight control is built into the chip, the backlight switch is also a simple pushbutton.4. The LCD display is compatible with 7106 based devices. So this is not e. g. UM7108F.5. The external circuitry looks typical for an ordinary 7106.The chip itself looks like a small COB blob without any markings around it on the PCB. What version can this be?

author: Martin72
author_rank: Super Contributor
timestamp: June 26, 2024, 08:00:09 pm
content: Hi,QuoteA picture of the chip/board instead of the complete meter would be more helpful for your question.

author: siealex
author_rank: Regular Contributor
timestamp: June 26, 2024, 09:07:47 pm
content: I'll take them tomorrow, taking a picture of the board from the chip side requires unsoldering the backlight LED.Strangely, on an "ordinary" 33C/133C there are TWO backlight LEDs and they are NOT attached to the display frame, so removing the frame is possible without any soldering.

author: magic
author_rank: Super Contributor
timestamp: June 26, 2024, 10:48:04 pm
content: 7106 was cloned countless times by countless manufacturers all over the world. Whatever it is, it's probably made in China so maybe search for "7106" on LCSC? But UNI-T is large so I suppose that such chip could also be a custom order from them, not available elsewhere.I'm sure it looks like every other black blob

author: siealex
author_rank: Regular Contributor
timestamp: June 26, 2024, 11:15:37 pm
content: QuoteYep, a round black blob. Interestingly, the PCB itself has a marking: 33C (CHN). Normal 33C has simply "33C". Can it be a special model for the Chinese market?
FSH Software - Page 1
Forum section: electronics / testgear

author: sezhReppo
author_rank: Newbie
timestamp: March 25, 2024, 05:27:53 am
content: Hi All!Can anyone help with getting FSH View for the FSH3 spectrum analyzer? I can't find it on the net...

author: pdenisowski
author_rank: Super Contributor
timestamp: March 25, 2024, 10:32:37 am
content: I need to check but I don't think there was ever a version of "FSHView" for the FSH3/6. There was software for the FSH4/8/etc. called "FSH4View", but the current version of software for the FSH4 is called "Instrument View"FSH4View:https://www.rohde-schwarz.com/software/fsh/InstrumentView:https://www.rohde-schwarz.com/software/instrumentview/There was a remote control option for the FSH 3/6 called "FSH-K1", but this was for enabling SCPI-type remote control (exchanging text strings), not a graphical tool like FSH4View.Edit: I just found this video from 14 (!!!) years agoI know the guy who made it, so I'll ask him if he remembers what he used : stand by

author: pdenisowski
author_rank: Super Contributor
timestamp: March 25, 2024, 10:58:14 am
content: Okay, so I learned something new todayHere's the manual for the FSH3 Remote Software (from 2005!)I have searched our internal systems but didn't find the FSHRemote 2.12 software shown in the video. I did find a file called "fshremote_2.12.4.exe" on one of those somewhat sketchy "download software here" sites, but obviously I can't vouch for its authenticity or safety.I've sent some emails about this and will let you know what I hear, but I strongly suspect that even if someone does have an installer, it's completely unsupported at this point.

author: eb4fbz
author_rank: Regular Contributor
timestamp: March 25, 2024, 06:49:09 pm
content: https://we.tl/t-2bL96LII03

author: pdenisowski
author_rank: Super Contributor
timestamp: March 25, 2024, 09:10:23 pm
content: Just got an installer from one of my co-workers (the one who made the video above):https://tinyurl.com/db5w4enz

author: sezhReppo
author_rank: Newbie
timestamp: March 25, 2024, 11:31:21 pm
content: Great words of gratitude to everyone! (Especially eb4fbz)). FSH version 14.2 runs under Windows 10 on my laptop. I already had FSHRemote installed. But I needed FSH to make corrections for my measuring antennas.Thanks! God bless you!

author: aXerman
author_rank: Newbie
timestamp: June 26, 2024, 04:20:35 pm
content: Hey there, do you happen to have an updated link for the FSHView application for the FSH3? I have been searching all over for it, which led me to this thread. Unfortunately, the WeTransfer link is expired, and I cannot seem to access the R&S one pdenisowski provided. Thanks guys!

author: pdenisowski
author_rank: Super Contributor
timestamp: June 26, 2024, 11:11:04 pm
content: Quote from: aXerman on June 26, 2024, 04:20:35 pmStrange that the link is already broken. If you don't get it from someone else, let me know and I'll see if I can find a more "permanent" way to post it.Sorry for the inconvenience!

author: aXerman
author_rank: Newbie
timestamp: June 28, 2024, 02:14:10 pm
content: Someone posted a new link in the other thread for 14.2, so I should be good. Thanks!
DC coupled High Bandwidth passive Probe - Page 1
Forum section: electronics / testgear

author: Andree Henkel
author_rank: Regular Contributor
timestamp: June 18, 2024, 09:42:12 am
content: Hy, I am looking for a DC coupled high Bandwidth passive Probe.Basically the 12GHz P20B from Auburn Technology is close to what I am looking for, but I would prefer DC coupling.Any hints?So far I found:Rohde & Schwarz RT-ZZ80, but I guess it is very expensive (~5 or more of the P20B, I asked for quote)900 "PicoConnect" Series of passsive Probes by PicoTech (~2 as expensive as P20B)

author: tggzzz
author_rank: Super Contributor
timestamp: June 18, 2024, 10:53:16 am
content: Quote from: Andree Henkel on June 18, 2024, 09:42:12 amMy definition of "high" is 100kHz, so virtually all probes will be OK.Alternatively, replace the adjective with a numberSearch terms "resistive divider probe" "Z0 probe".I have several HP10020A probes, and like them

author: Andree Henkel
author_rank: Regular Contributor
timestamp: June 18, 2024, 11:01:25 am
content: Ok, more Detail of desired Probe:Bandwidth 5GHz or aboveDivision 10:1 -> 450Ohm tip resistoror Division 20:1 -> 950Ohm tip resistorpreferable DC coupled

author: tggzzz
author_rank: Super Contributor
timestamp: June 18, 2024, 11:17:59 am
content: Quote from: Andree Henkel on June 18, 2024, 11:01:25 amHP54006A 6GHz.Tek P6150 9GHz

author: Andree Henkel
author_rank: Regular Contributor
timestamp: June 18, 2024, 11:49:33 am
content: Ah, ok both seem to be discontinued, that´s why I didn´t find them at tek / keysight product pages.But they are both available at used test equipment vendors.

author: RAQU_PL
author_rank: Contributor
timestamp: June 18, 2024, 09:05:21 pm
content: Andrew Zonenberg has created few open source probes including Z0. It is called AKL-PT1 and has over 6 GHz BW.They seems to be out of stock but You can contact him or DIY.https://www.antikernel.net/products.html#passivehttps://github.com/azonenberg/starshipraider/tree/master/boards/probeshttps://github.com/azonenberg

author: hpw
author_rank: Frequent Contributor
timestamp: June 19, 2024, 07:38:21 am
content: Quote from: RAQU_PL on June 18, 2024, 09:05:21 pmLooking forward for the Differential Probe

author: calibrationfixture
author_rank: Regular Contributor
timestamp: June 25, 2024, 06:27:44 am
content: Hi Andree Henkel," Bandwidth 5GHz or aboveDivision 10:1 -> 450Ohm tip resistorDC coupled "PSPL 5520C Voltage Pick-Off. 20 GHz BW with 1:10 Attenuation. DC-Coupled. A cost effective alternative to Tektronix P6150 + 013-0251-00/01 and P6156 + 013-0237-00 combinations.Calibrationfixture
Pomona vrs 3M SOIC test clips anyone tried both? - Page 1
Forum section: electronics / testgear

author: hazzer
author_rank: Regular Contributor
timestamp: June 24, 2024, 08:53:53 am
content: Just received my set of Pomona SOIC test clips, I'm a bit disappointed, as mentioned elsewhere the pins are held in place by melting the plastic body, also the on the larger 28pin clip the alignment is poor - so this set will be returned, but my question is ....are the 3M SOIC test clips a better bet? has anyone tried both? how are the 3M pins held in positionthe 3M are slightly more expensive so are they worth the extra?ThanksHarry
B&K 500 Tube Tester Dual Triode Mod - Page 1
Forum section: electronics / testgear

author: pfgelectronics
author_rank: Newbie
timestamp: June 23, 2024, 10:41:18 pm
content: I have gotten much help here over the years but never had cause to join, or post, but I finally have something that others might find useful so I thought I would share it. Anyone who has used the B&K Model 500 tube tester is probably aware that one of it's major shortcomings is that it tests dual triodes such as the 12AX7 in parallel. There is no means to test each section's output separately to determine balance between the triodes, such as for a phase inverter. After looking at the manual for their later 707 model, the answer became clear, put in a switch. I installed a simple SPDT toggle switch between the plate supply/meter and the plate terminals on socket 9A. This is exactly how they did it in the 707 and it works perfectly on the 500.Some things to keep in mind are that you will need to flip the switch to check both plates for the other tests as well, and the fact that the power feeds from socket to socket so you will need to carry through from switch to the next socket. Finally the switch should be rated for 250VDC as the plate circuit is 205VDC, most commonly available are not DC rated at all or only to 12V. Now I am going to install an 0n/0n/0n type DPDT switch to allow the other tests to work as designed by having both triodes connected in parallel in the center position. The switch currently in mine is only 250VAC rated, but I wasn't going to spring for a $50 switch until I knew the concept would work. The one I have ordered is Honeywell part number 32NT91-10.With this addition, and perhaps wiring up a socket to handle EL84s, I think the B&K 500 becomes a great option for the casual user, especially considering that they can be found for ~$100 at the time of this posting.
FieldFox Frankencalibration - Page 1
Forum section: electronics / testgear

author: jjoonathan
author_rank: Frequent Contributor
timestamp: June 23, 2024, 05:52:52 pm
content: Hey so I recently fixed up a FieldFox, but that's a story for another post. I need to give it a new network analysis calibration. The factory calibration ("CalReady") is pretty aggressive; even if you set a custom preset with your own calibration active the instrument will boot up with every aspect of your custom preset preservedexceptfor the network analyzer calibration, which will be set back to CalReady. It bugs me to have a crummy auto-set, so I have to figure this out. It looks like the factory calibration is stored in:Code:C:\Flash\FieldFox\FactoryData\NAFactoryCalset.binI poked around and it looks like you can generate something in a very similar format by performing a calibration, saving the instrument state to a ".sta" file, unzipping the .sta file, and extracting "CalsetLibrary". Similar, but not exact. The header and footer are different, but if you graft them from NAFactoryCalset.bin to CalsetLibrary to form FrankenCalibration.bin and then replace NAFactoryCalset.bin with FrankenCalibration.bin it seems to work. The header differences are pretty trivial (different magic number and a constant that probably flags it as factory special, or records how much love it was made with, or something) but the footer has some stuff in there. Does anyone have any idea what the stuff in the footer is? Whatever it is, it's needed, and without it the parser runs off the end of the file. As far as I can tell the FrankenCalibration is alive and well, I'd just like to know what I grafted onto it to get it that way, lol.
Upgrading Tektronix TLA704 with TLA721 Controller Board impossible? - Page 1
Forum section: electronics / testgear

author: schneekette
author_rank: Newbie
timestamp: June 19, 2024, 06:17:19 pm
content: Hi guys,a long time ago I had seen someone upgrade his TLA704 (or 714?) with a Controller Board from a TLA721, but for the life of it I can't find the page anymore.I have the parts already (my working TLA704 and a TLA721 controller module in said-to-be-working condition), so I tried on my own now, but I'm unfortunately stuck with a black internal screen.Does anybody know if this upgrade should be possible at all?Maybe it's just one of the jumpers that needs to be set to enable the display controller for the internal screen? But I have not found any documentation of the controller board.Mechanically the board roughly fits with the exception of 2 external connectors that have slightly moved by a mm. It does power on and starts booting.It does bluescreen after the W2K logo, but that might purely be a software issue, I don't think it has anything to do with the display problem. Even without a HDD at all I'd expect to see the BIOS screen on the internal display just like I do with the TLA704 controller.It seems possible that a TLA721 controller requires some reconfiguration to be used in a TLA715(/714/704) chassis due to the differences like the display or number of slots.Maybe someone has tried the same, knows the website I had remembered about the upgrade, or has a documentation about the TLA715/721 controller board, which barely is documented in the service manuals. I'd be very grateful.Thanks!Stephan

author: RomDump
author_rank: Regular Contributor
timestamp: June 20, 2024, 11:18:53 am
content: Quote from: schneekette on June 19, 2024, 06:17:19 pmhttps://realstrannik.com/forum/freeenergylt-antanas/5-oborudovanie-dlya-masterskoj?start=70

author: schneekette
author_rank: Newbie
timestamp: June 23, 2024, 01:11:46 pm
content: Hi RomDump!Incredible you found that! That was not the page I remembered, but indeed this guy did it too!The downside is that there really is no way around replacing the display, adding signal conversion and finding a way to mount the new display. That's a bit less plug&play than I had hoped (or remembered), so not yet sure if I should really go that route.But thank you for digging it out!Stephan
cheap DC-DC converter with external serial or USB control ? - Page 1
Forum section: electronics / testgear

author: JBeale
author_rank: Frequent Contributor
timestamp: June 21, 2024, 06:41:32 pm
content: My feeble searches for this have come up short. It seems possible, because of the existence of things like "DROK Buck-Boost Converter, 80W"https://www.amazon.com/dp/B0BQBXMH67for only $22. I have one of those, and it works satisfactorily for my needs. You can control both the voltage and the current-limit separately, using one digital control knob and some buttons. The adjustment response is slow: apparently they are driving the DC-DC block with a PID loop implemented in software that relies on the slow ADC (maybe 0.5 sec per update) that also drives the I and V display, so in response to a step change, you can observe the voltage and current bounce around for several seconds, before settling.At any rate it's good enough for my project, and it is clearly using a MCU with strictly digital inputs; several switches and the push / turn rotary encoder control. I guess I could hack those, but I'm just wondering if anyone took the next step and offers a similar item with external serial port or USB port that accepts voltage and/or current setpoints. I understand "programmable power supply" is a standard item, but the models I know about are in a different price class, in exchange for better performance in ways I don't actually need. Given the existence proof of a $22 item, I was imagining a serial-control-capable version of the same thing might be only slightly more.

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 21, 2024, 07:32:40 pm
content: These are good:https://www.amazon.com/gp/product/B09B1NW9NH/I use variations of that in my tube tracers. I have that one in my current tracer with the intent of controlling it over Bluetooth, but haven't tested that part out yet. It comes with USB and BT boards.

author: JBeale
author_rank: Frequent Contributor
timestamp: June 21, 2024, 08:07:27 pm
content: Great, that looks exactly like what I was thinking about, thank you!The user manual that Amazon links to only mentions using a provided Windows program, but I see that full user control details are available in a nice review atwhich describes a very usable python program that allows for all the control you probably need under script control fromhttps://github.com/TheHWcave/DPS5005-control(which is all I need) or if that's not enough, the modbus protocol register description provided in the documentation folder athttps://www.mediafire.com/file/1bwi72wovy10oe1/DPH5005_file_%25282017.11.08%2529.zip/file

author: KungFuJosh
author_rank: Super Contributor
timestamp: June 21, 2024, 09:11:02 pm
content: If I find the links, I'll share them, but people have gone crazy with that unit. I think there might even custom firmware for it somewhere. Do some googling and you might find it. There's all kinds of stuff out there.
SVA1032 troubleshooting (RF input?) - Page 1
Forum section: electronics / testgear

author: F4FEI
author_rank: Newbie
timestamp: May 17, 2023, 01:08:42 pm
content: Hi,In 2019, I purchased a spectrum/VNA analyzer SVA1032x that has today the following symptoms:0 dbm from a 50 ohms generator on RF input gives around -10 dBm on the display.The RF input return loss is between 5 and 10 dB, which is very bad.These hereabove symptoms seem to indicate that the RF input IC is out of order (probably due to a ground problem between the generator and the analyser, now solved).I asked for a quote to repair the spectrum analyzer: 1369€!In fact, Siglent seems not to repair at the component level, but changes the motherboard.I am really disappointed by this repair policy.Have any of you had a similar mishap?Any idea to help me to repair at componet level?Attached picture: Input level (TG level at -20 dBm ==> -30dBm on the display).Thanks in advance.

author: tautech
author_rank: Super Contributor
timestamp: May 17, 2023, 01:23:14 pm
content: Welcome the forum.To be clear, it has never been Siglent policy to provide component level repairs as accuracy cannot be assured unlike with a calibrated module/PCB.Now that's said here are links to previous repair threads where if you can comfortably work with sensitive RF PCB's you can repair yours which has the same RF In circuitry as SSA3000X Plus models.https://www.eevblog.com/forum/testgear/siglent-ssa3000x-spectrum-analyzers/msg4653826/#msg4653826Please update this thread with your repair as to help others in the future.

author: F4FEI
author_rank: Newbie
timestamp: June 22, 2024, 06:15:53 pm
content: After months of hesitation, consulting tutorials, training to desolder and re-solder QFNs, I finally managed to change the input IC HMC1118.It wasn't easy, but it's done and the result is there: the spectrum analyzer is working again.Cost of repair:- hot plate: €5 (Ali...),- HMC1118: €20 (Mouser).That's €25 compared to the €1369 asked by Siglent for repair.Of course, I was already equipped with:- Hot air gun,- flux and solder paste,- magnifying glass.I have performed tests according the Siglent Service Manual. All are OK.Conclusion: It's worth persevering!
DER DE-5000 Issue selecting Dissipation, Q-Factor, ESR during cap measurement - Page 1
Forum section: electronics / testgear

author: BFP
author_rank: Newbie
timestamp: June 21, 2024, 03:08:53 am
content: Just recently purchased this meter from Amazon and while trying to measure electrolytic caps at 120Hz (i.e. 1000 uF & 2200 uF), I'm unable to select the Q-factor, ESR or Phase Angle. Only the default dissipation factor is provided and the meter beeps twice at me when pressing the button which tells me it's a non-functional parameter when it should be (I think).However, if I cycle to inductance, I'm then able to select these factors (Q, ESR, theta) or if I cycle through the LCR and back to C measurement, I can THEN select those parameters with no issue.Just wondering if I'm the only one experiencing this bizarre behavior. Thanks.

author: TheDefpom
author_rank: Frequent Contributor
timestamp: June 21, 2024, 03:12:58 am
content: it defaults to auto mode, to do any kind of detailed measurements you need to select manual C mode to do it, its normal.

author: BFP
author_rank: Newbie
timestamp: June 21, 2024, 04:01:19 am
content: Cool, thanks. I'll try that out.

author: BFP
author_rank: Newbie
timestamp: June 21, 2024, 01:34:36 pm
content: There doesn't appear to be a method to exit "auto" mode for L & C measurements. The strange thing is that the user manual states D,Q,ESL,theta should be accessible even in Auto mode.Those parameters are NOT available UNLESS i cycle through them in Auto L mode only, once I do that I can cycle through them in Auto C.
DHO900: can not enable wifi - Page 1
Forum section: electronics / testgear

author: Basilisvirus
author_rank: Newbie
timestamp: June 25, 2024, 12:49:33 pm
content: I try to make my Rigol924S connect to the WiFi using usb wifi adapter and a keyboard.I have managed to connect the oscilloscope to the wifi at the past, but now that I removed and plugged the wifi adapter again, I cannot.The issue is, when I open up the android interface, I cannot enable the wifi. It looks like its always disabled. If I click on "on/off" on the wifi signal it very quickly turns on/off, the moment I press it. It wont stay on.How can I enable the wifi again?
Lecroy HDO status icons - Page 1
Forum section: electronics / testgear

author: Uwe9V
author_rank: Newbie
timestamp: June 19, 2024, 09:00:57 pm
content: Does anyone know what are these Status icons meaning in Measure Table view?I couldn't find anything in documentation about them.

author: carb_enjoyer
author_rank: Newbie
timestamp: June 20, 2024, 07:44:29 am
content: Lecroy LC series scopes use the same icons, assuming their function is the same look here:https://cdn.teledynelecroy.com/files/manuals/lc_om_reva.pdfChapter 14, page 183 in linked pdf file.

author: Uwe9V
author_rank: Newbie
timestamp: June 20, 2024, 07:47:07 am
content: Quote from: carb_enjoyer on June 20, 2024, 07:44:29 amThanks a lot, that was very helpful!
RTB-B6 external trigger - Page 1
Forum section: electronics / testgear

author: sp5lst
author_rank: Newbie
timestamp: June 17, 2024, 04:00:30 pm
content: Hello.I have no experience with this type of generator and would like to ask for advice.My task is to generate an arbitrary pulse signal triggered by a 1PPS reference signal (trigger).I have an R&S RTB2002 oscilloscope without generator function. And I would like to ask you who has had experience with the RTB-B6. Can this generator generate pulses from an external trigger? And if not, I have a choice between R&S HMF2525 and Keysight 33511B. Is there an option in these generators to set the frequency to 10,000,000.0001 MHz? I need this for other tasks.Thank you for your answers.

author: Fgrir
author_rank: Regular Contributor
timestamp: June 18, 2024, 02:26:06 pm
content: I have an RTB2004 with the B6 generator option and I do not see any settings to allow for external triggering or modulation of the generator outputs.

author: nctnico
author_rank: Super Contributor
timestamp: June 18, 2024, 03:09:29 pm
content: Quote from: sp5lst on June 17, 2024, 04:00:30 pmThe jitter performance of the HMF2525 is not great so I'd skip that one. I have good experiences with using the Tektronix AFG31000 series for use in precise timing / phase / frequency shifting related measurements to simulate long term drift / frequency offsets in time references. I expect the Keysight 33511B to be on par performance wise but I have no hands on experience with that generator.The best way forward is to make sure to actually measure (using a test setup) whether the function generator you get, can actually do what you require. A lot of details which do matter don't make it into the specifications. In other words: get a unit on loan for evaluation before committing to buying one.

author: sp5lst
author_rank: Newbie
timestamp: June 20, 2024, 06:12:36 am
content: Thank you very much for the replies. That's what I'll do, I'll try to get a loaner generator for testing.
SDG1025 with 32char MCBD? - Page 1
Forum section: electronics / testgear

author: Frankupthehall
author_rank: Contributor
timestamp: June 20, 2024, 01:39:05 am
content: Hi Folks,There are clues in these forums discussing the liberation of the SDG1000 series (and newer) function generators.I've collected all the scripts and instructions, but I'm confronted with the disparity that when I issue a "MCBD" command to my SDG1025, I an returned with a 32 character result, which is actually just the just a 16 character code repeated: just like "NZ2CMUK55SMTBP3NZ2CMUK55SMTBP3"When I've used the script lingering around here, I can't achieve the same 16 character string that I see repeated.Am I missing something? Is the SDG1025 not one that can be liberated?Thanks folks!
Adjustable 8ch. Clock generator 2.5K-200MHz 0.5ppm [Si5351B/PLL] - Page 1
Forum section: electronics / testgear

author: DaneLaw
author_rank: Frequent Contributor
timestamp: June 20, 2024, 12:28:36 am
content: Is anybody familiar with these, and got a deeper description of the UI.?DatasheetMy Chinese is a little rusty, to the point of non-existent.https://www.skyworksinc.com/-/media/SkyWorks/SL/documents/public/data-sheets/Si5351-B.pdf
DSA-1030 hacks or options? - Page 1
Forum section: electronics / testgear

author: radef
author_rank: Newbie
timestamp: January 26, 2023, 02:24:58 am
content: I bought a DSA-1030-TG several years ago that included the pre-amp option. This has been one of my favorite spectrum analyzers I've used. I like it so much, that I bought another DSA-1030 (no TG or PA options in this one).I reached out to Rigol - they tell me the Pre Amp option is no longer available (funny - it's just a software key... why discontinue that?).Anyone have luck convincing this spec an to enable some additional features? Or converting a DSA-1030 to a DSA-1030A? There are few threads on here about the DSA-1030 and to my knowledge, no tips on hacking these.

author: thm_w
author_rank: Super Contributor
timestamp: January 26, 2023, 02:40:25 am
content: No posts that I see.But you can try:https://gotroot.ca/rigol/riglol/https://www.eevblog.com/forum/testgear/rigol-dsa-1030-spectrum-analyzer-feature-unlocking/https://www.eevblog.com/forum/beginners/rigol-dsa1030a-tg-serial-hack/

author: Grad
author_rank: Newbie
timestamp: June 19, 2024, 08:03:45 am
content: I have the same DSA-1030-TG. Did you find a way to enable the pre-amplifier?
RF connector input (R&S FSP7) - Page 1
Forum section: electronics / testgear

author: pogrebnushkin
author_rank: Newbie
timestamp: June 18, 2024, 01:23:17 pm
content: Hi. I try to find a partnumber rf connector of R&S FSP7 spectrum analyzer. Maybe somebody could help me with it. Thanks

author: Kean
author_rank: Unknown
timestamp: June 19, 2024, 06:31:54 am
content: That is a whole cable assembly.The damaged N connector looks like it could be from the Huber+Suhner 25_N-50 series.

author: tooki
author_rank: Super Contributor
timestamp: June 19, 2024, 06:42:27 am
content: Indeed, getting the connectors is the easy part; getting the rigid coax, assembling it to the connectors, with the correct ferrites in the right spots, and then bending it to shape, not so easy!I don’t have enough experience with rigid coax to tell whether that connector is soldered or crimped; if it’s soldered, maaaaaaybe it’s possible to replace the damaged N connector only.

author: Kean
author_rank: Unknown
timestamp: June 19, 2024, 06:57:53 am
content: Quote from: tooki on June 19, 2024, 06:42:27 amExactly the same thoughts here.As is common, the OP doesn't really provide enough info, and seems not to have done any initial research.If they use a FSP7 then they would presumably also have enough RF experience to know this stuff.
Fluke DAQ 6.0 Software Activation Key - Page 1
Forum section: electronics / testgear

author: TonyBarr
author_rank: Contributor
timestamp: June 21, 2024, 12:45:31 am
content: I just purchased a Fluke 2645A Data Acquisition system. Fluke still offers the Windows based DAQ 6.0 controller software for download. Unfortunately, the instrument did not come with the original software CD and the activation key, so the best I can expect is a 40 day free evaluation license. I talked to Fluke tech support today and they were of no help. I would greatly appreciate it if someone would let me know how I can activate the software so I can use my new investment.Thank you,Tony
RigExpert REAMP Power Consumption Logger - Page 1
Forum section: electronics / testgear

author: Dave_g8
author_rank: Regular Contributor
timestamp: June 18, 2024, 10:25:12 am
content: As a possible alternative to the Nordic PPK2, I purchased a RigExpert REAMP for evaluation.Overview:For anyone experimenting with MCUs and low power IoT devices, the REAMP is a great little product. It allows dynamic measurement of device currents from µA’s up to 1000mA. The output voltage is configurable from 1.8V to 5.2V and as well as monitoring the load current it has two voltage monitoring inputs. The built in Li-ion battery avoids the use of two USB power sources for load currents greater than 500mA. The unit also has a SYNC output and TRIG input to allow synchronisation with the target device.At the current price of $70 (£60 in the UK) it is really good value.Reference:https://rigexpert.com/products/reamp-logger/Brief comparison with Nordic PPK2:NotesThe current resolution for the REAMP is not specified, but practical measurements indicate that it is less than 0.2uA on the 10uA and 100uA ranges, increasing to 300uA on the 1A range.The burden voltage is the theoretical maximum and in practice will depend on more factors, including test connections.Example captures are shown below.UNI-T UT60BT DMM (Bluetooth Enabled)ESP8266 MCUA few images of the REAMP are shown below.

author: nali
author_rank: Frequent Contributor
timestamp: June 18, 2024, 10:28:42 am
content: Where did you buy it from out of interest? I took a brief look but the UK agents listed on RigExpert's site didn't show it on their respective sites.

author: Dave_g8
author_rank: Regular Contributor
timestamp: June 18, 2024, 10:33:29 am
content: Hi,I purchased it from Moonraker, but unfortunately I see they are currently out of stock.
Looking for JDSU TPP Server/Client Software - Page 1
Forum section: electronics / testgear

author: Bicurico
author_rank: Super Contributor
timestamp: June 18, 2024, 09:58:13 pm
content: Hello,I bought a second hand JDSU DSAM 6300 XT and looking for the TPP installer.Should be file called "tpp_4_8_server_client_install_0.zip". This is no longer available at Viavi andwww.archive.orgdoes not have it, either.Perhaps somebody can send it to me via WeTransfer?Thanks!
Do inexpensive CC/CV AC power supplies exist? - Page 1
Forum section: electronics / testgear

author: calzap
author_rank: Frequent Contributor
timestamp: June 18, 2024, 05:48:53 pm
content: Does anyone make a relatively inexpensive (US$500 or less) low voltage, CC/CV AC power supply (aka AC power source)? Ideally 0-36 V, 0-3 A, isolated output, V and A fine/coarse knobs and digital displays. Similar specs to those of countless inexpensive DC power supplies. Variable frequency, programmability, remote control, and polyphase are not needed. I have a variac, but it doesn’t meet the specs. And yes, variacs with digital V and A displays are available … but how about a CC control? When I need low voltage AC for testing, I use a fixed voltage, isolated-output transformer powered by a variac for voltage control. When current limiting is needed, I calculate the appropriate size resistor and use that in series. This is really a fixed power mode because the appropriate size resistor will depend on applied voltage. Pretty clunky compared to when I need similar DC voltage and current for testing … set V and A on HP, GW or BK supply, connect, and go.AC supplies I’ve found that meet my specs cost upwards of US$1000 and have additional, unneeded features.Mike

author: exe
author_rank: Unknown
timestamp: June 18, 2024, 07:04:41 pm
content: I didn't find anything when I looked.I concluded that my best bet is to use a power opamp (like TDA2003A or something), and some sort of current bipolar limiting circuitry ().If it's a resistive-like load, then a unipolar conventional power supply with current limiting and a DC-blocking capacitor may work.But, from my mini-research, people just put a fuse for protection and that's it). For bipolar current limiting something can be used, see simplified schematic for Keithley 236 SMU:https://www.eevblog.com/forum/projects/how-to-design-fast-bench-supply-with-cc-and-cv/msg3173706/#msg3173706. But probably something simpler can be designed.
Adding option 488 to a Fluke/Gigatronics 6060B - Page 1
Forum section: electronics / testgear

author: ZGoode
author_rank: Frequent Contributor
timestamp: March 25, 2024, 10:42:58 pm
content: I recently acquired a Fluke 6060B that unfortunately did not have option 488 installed, so I decided to go about replicating a replacement board for that. I got lucky since the GPIB chip it relies on is a UPD7210, of which I have a few NAT7210's on hand (a drop in replacement). This board design should be also compatible with the 6060A, 6061A/B, and possibly a few other models.I have not tested this yet, as I just finished the eCAD design and have just sent it to JLCPCB. I will post an update when the board is received and tested.A weird quirk I saw in the various manual revisions I found is that sometimes it lists a 273 instead of a 373. Although I am assuming that is a typo and they meant 373 since the 273 is only mentioned once in one revision.Edit: removed error files, refer to my more recent reply for up to date gerbers and schematics.

author: ZGoode
author_rank: Frequent Contributor
timestamp: April 18, 2024, 03:24:06 am
content: I found one minor mistake with how the DIP switch was connected, I have updated it.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 18, 2024, 04:01:51 pm
content: better remove the "bad" files, go in the attachements and uncheck them ...

author: ZGoode
author_rank: Frequent Contributor
timestamp: June 22, 2024, 04:08:48 am
content: I received the board the other day from JLCPCB and after assembling tested it. I was able to get the instrument to reply with its ID of 6060B, so I can confirm that this board does work!I do need to make a revision to the board since it is a little too short to interface with the back panel and connect the pins, but otherwise it works electrically
Looking for older version of Rohde & Schwarz NrpToolkit.exe - Page 1
Forum section: electronics / testgear

author: cmu2017
author_rank: Contributor
timestamp: June 13, 2024, 08:51:59 am
content: Hello,Does anyone have an older version of Rohde & Schwarz NrpToolkit.exe? Something like version 2.1. I know the latest version is on the Rohde & Schwarz website. But I am specifically looking for an older version with the power viewer as below. I lost mine.

author: zcjhit
author_rank: Newbie
timestamp: June 17, 2024, 06:52:48 am
content: I can sahre you old firmware,pls send me you mailbox

author: cmu2017
author_rank: Contributor
timestamp: June 17, 2024, 08:03:31 am
content: I sent you a PM
Spectrum Digital XDS560v2 JTAG debug probe. - Page 1
Forum section: electronics / testgear

author: oleh
author_rank: Contributor
timestamp: June 17, 2024, 12:31:38 am
content: Hello,Not so long time ago I found Spectrum Digital XDS560v2 debug probe on eBay, for a good price. It has a blue tail with 50 pin Samtec on the end. Initially, I thought it was 60 pin, but it was notVisually they are identical, until you count the pins. There is a buffer card which converts 50 pin signals to 60 pins MIPI-60 signals.Can anybody please give me clues about how this buffer card connects 50 pins connector to 60 pins connector, or even better 20 pins connector?Thank you,Oleg