Recent Posts

1

Test Equipment / Re: SDS800X HD Bugs/Wanted Features

« Last post by tautech on Today at 09:00:00 am »

Serial decoding

I do a lot of RS485 serial decoding on an SDS2000X HD, and one of the things I miss that the older R&S RTB2004 it replaced had was the ability to show the entire "message" as a single frame/packet, and not as single bytes in a list, like the Siglents does it.

https://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-12bit-(published-for-chinese-domestic-market-only)/msg5270949/#msg5270949

I've been an R&S RTB2004 user for several years but decided to buy an SDS2000X HD to use as a secondary scope.
I liked it better than the RTB2004, so the Siglent is now the main scope. And after 3D printing that VESA mount for it, it's such a convenient instrument!

However, one thing I haven't figured out is the UART bus table.
I do a lot of half-duplex RS485 decoding, and with the RTB2004 it would display each "frame" (burst of characters) on a single line in the table. The Siglent on the other hand, just places each character on a new line in the table, and I end up having to fiddle a lot to compare two received "frames".

Is there a way to have the bus table look like the RTB2004 that grouts the received data in "frames" rather than filling a list I must scroll through?

electronics hobbyist, can you add the following feature to the list as well? I have an SDS2000X HD at work, and I've ordered a 1000X HD to have at my bench at home, but this (missing) feature I'm pointing out applies for the entire Siglent lineup AFAIK, at least the 800X HD, 1000X HD, and 2000X HD. I know many other manufacturers do it exactly the way Siglent does it, but that doesn't mean it could have been done better!

Good suggestion for the entire platform range and one I believe could be accomplished quite simply by adding a menu View (type) option in the Decode List comprising of a Bytes or Frames choice, Bytes being the current list default view.

There certainly is sufficient room in the Decode Lits menu to add a View header with Bytes and Frames as the pop out choices.
In addition just the List headers would require modifying for a Frame view labels.

See screenshot and suggest where a new View (type) header should be added.....IMO directly below Display.

2

Projects, Designs, and Technical Stuff / Re: ANITA MK IX Restoration

« Last post by Haenk on Today at 08:57:39 am »

I never dared to fire up my Anitas (yes, several models, all sold now).
Essentially, almost all parts can and do go wrong in these machines, so it's almost the best choice to check every single component. The wicked semiconductors are known for their high failure rate, so prepare to "re-create" a couple.

3

Test Equipment / Re: Looking for a replacement general purpose oscilloscope for home use

« Last post by 2N3055 on Today at 08:51:07 am »

But: I would not (yet) consider their 6000 and 7000 series as a serious option.

Friendly regards

Could you elaborate why, if you are willing to?
What is making you say so?

Thanks and best regards,

Siniša

4

Other Equipment & Products / Re: CFW for KSGER/Quicko STM32 Soldering Stations

« Last post by elektryk on Today at 08:50:06 am »

Finally, I bought a KSGER v3 for my dad, replaced the stinky MM32 with a STM32, flashed the CFW, all good.
PID was a bit off, slowly oscillating back and forth.

After some tuning I got it pretty decent with the following settings:

FILTER MENU
 - Filter: 75%
 - Threshold: 60
 - Min: 40%

PID:
 - Kp: 45
 - Ki: 15
 - Kd: 6

Though the response with the Quicko tips are close to perfect compared to my old ones!

Can you recommend settings for genuine T245 (for example 931)?
In my case default ones leads to some oscillations.

5

Test Equipment / Re: ANENG goes crazy with new meters

« Last post by Aldo22 on Today at 08:49:00 am »

This list is great, but because manufacturers are more or less lying about their products. Sometimes they lie so much that it is more than obvious - like a small €6-meter I have on my bench that is labeled as CAT IV 600V.

The lying isn't ideal, but:
a) Anybody who knows what "CAT IV 600V" is wouldn't believe it, and

b) Anybody who doesn't know it's a lie isn't going to be saved by them taking it off.

My (purely empirical) observation is that Harbor Freight has been giving away millions of DT830s for decades and there's no trail of dead bodies across the country.

That's exactly it. I'd like to see statistics on how many people have died as a direct result of using an AN870 instead of a Fluke in household applications.

My guess is 0.

And if you think you should do anything above CAT II with a $20 meter, then you're in God's hands anyway.

Yes, they shouldn't lie about the specs, but let's not spread FUD.

6

Microcontrollers / Issues with LwIP Multi-Interface Switching

« Last post by tilblackout on Today at 08:45:02 am »

Hello everyone, I am implementing a program with LwIP that supports multiple network interfaces, allowing internet access via both a 4G module and Ethernet. Switching between network interfaces is simply done by calling netif_set_down/up and netif_set_default.

The 4G module is connected to the microcontroller via USB and supports RNDIS mode, which means the TCP protocol runs within the module, and the microcontroller can acquire an IP address via DHCP from the 4G module to access the internet.

However, I've encountered a peculiar issue. When switching the network to the 4G module, I cannot access the internet. Here are a few things I've tried:

1、Without using Ethernet, upon powering up, the device successfully accesses the internet through the 4G module. If I then turn off the 4G module's internet connection and turn it back on, the device can obtain an IP via DHCP but fails to access the internet again, with continuous ping failures. (This makes me suspect a problem with the USB driver reinitialization.)
2、With Ethernet connected, after powering up and accessing the internet via the 4G module, I then turn off the 4G module. The device automatically switches to Ethernet (which works fine for internet access). Then, when I turn off Ethernet and switch back to the 4G module for internet access, the 4G connection surprisingly works. (This leads me to suspect an issue with the LwIP multi-interface switching logic.)

This means that as long as the netif switches from Ethernet to the 4G module, internet access is possible, but restarting the 4G module alone does not allow internet access. This makes it difficult to determine whether the issue lies with the USB driver or the LwIP stack.


Does anyone have any insights or suggestions? Thanks for your input!

7

Metrology / Re: WinGPIB - Windows GPIB App (multi-purpose)

« Last post by IanJ on Today at 08:34:41 am »

I've been trying to install this and getting stuck at the same step every time (this usually takes place months apart). I run the msi and there's no prgram anywhere on the x86 or the other Program Files folder.

Also, I'm not sure what I need to do with the "Version 3.143 and over requires MCP2221DLL-M-dotNet4.zip which is available in the downloads if you are updating." There's a dll in that zip, and just stating "it's required" gives no indication where the dll needs to be dropped.

This is on a Windows 10 Pro system.

Thank you very much for assisting with this.

There was a small mistake in POST #1 about the path where WinGPIB is installed. It should read:
C:\Program Files (x86)\IanJ\WinGPIB\
After installation a shortcut is copied to your desktop, but failing that you run WinGPIB.exe to start the app.

The MSI installs both the required .DLL files, you only need to manually place the DLL is you are updating an old WinGPIB installation manually, i.e.
Download MCP2221DLL-M-dotNet4.zip and unzip the .DLL from the file then place it in the WinGPIB installation folder, which is usually:
C:\Program Files (x86)\IanJ\WinGPIB\
or
C:\Program Files (x86)\WinGPIB\
.....depending on the age of the original version you are running.

If after full installation you have no such program folder then the install may have failed for you.......did you get an error message?

Ian.

8

Repair / Re: Which USB3-SATA dock/cradle/adapter for 3.5+2.5" hdds without 4K/sec emulation?

« Last post by Greybeard on Today at 08:34:37 am »

I've opened the case of my Sharkoon SATA QuickPort XT USB 3.0 dock and confirmed the Bridge IC:

Asmedia ASM 1051.

I found several firmwares on this site:

But I'm not sure which one could be the correct one.
Some named Asmedia ASM-105x (photos show ASM1051) , one is named Asmedia ASM-1053 (maybe wrong IC type, shown photo is unreadable)

I try to contact the maker again to get more info and/or firmware...

9

Projects, Designs, and Technical Stuff / Re: Design of white noise generator for bathroom??

« Last post by magic on Today at 08:31:52 am »

As far as I understand, the purpose of the system is to be heard by the wife inside, so that she thinks that her farts aren't heard outside.

Just make it loud inside, no point overengineering any further

10

Test Equipment / Re: ANENG goes crazy with new meters

« Last post by Fungus on Today at 08:24:02 am »

This list is great, but because manufacturers are more or less lying about their products. Sometimes they lie so much that it is more than obvious - like a small €6-meter I have on my bench that is labeled as CAT IV 600V.

The lying isn't ideal, but:
a) Anybody who knows what "CAT IV 600V" is wouldn't believe it, and

b) Anybody who doesn't know it's a lie isn't going to be saved by them taking it off.

My (purely empirical) observation is that Harbor Freight has been giving away millions of DT830s for decades and there's no trail of dead bodies across the country.