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The Siglent SDG2042X Thread

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St66666:

--- Quote from: Performa01 on June 05, 2023, 04:44:32 pm ---
--- Quote from: St66666 on June 05, 2023, 04:39:49 pm ---I don't know when this started and I'm pretty sure everything was fine before, but now if I select 1KHz 1 volt peak to peak signal on the SDG2042X I confirmed it with 2 scopes that I indeed have 2V peak to peak coming out of the generator.

The software version is 2.01.01.37R3

hardware version 02-02-00-40-00

It is changed to be a SDG2122X a while back, but I don't recall seeing higher voltages earlier.
There is a possibility that I missed it after the firmware update, but I think I would have noticed it sooner.

Anybody had issues with the amplitude being double what it should be?

--- End quote ---

Set the output impedance to High-Z when high-Z probing is applied.

--- End quote ---

Damn ...
How on earth I did not noticed it before or did I forget all about it?
Thanks

Twollis:
Hello  i just bought a brand new Siglent SDG2042X  and found that i can upgrade it to 120Mhz but i saw that there is 2 hardware versions can u upgrade to 120mhz the newer version and how easy and safe is it? This is first time doing something like this so i am completle clueless.

MathWizard:
To use the Bode plot on my sds1204x-e, with my sdg2042, can you do it with just the regular high impedance scope probes, measuring just the input and output of a circuit ? Or do you always have to have the AWG tied to the scope, and all with 50ohm coax and terminators and all that stuff ? Like in this video.

I still don't have any of that stuff, I might have a M-M 50ohm cable if 1 came with the 2042x. Besides that, I only have the cables that they sell with $20 scopes, with BNC on 1 end, and aligator clips on the other, and I think they are just sub 1 ohm wires.

Performa01:

--- Quote from: MathWizard on July 08, 2023, 01:42:13 am ---To use the Bode plot on my sds1204x-e, with my sdg2042, can you do it with just the regular high impedance scope probes, measuring just the input and output of a circuit ?

--- End quote ---
Of course you can use whatever probing fits the bill. There are settings to tell the Bode Plot about the impedance of the DUT interfaces. In 99% of the practical cases this will either be High-Z (passive high impedance probes) or 50 ohms (laboratory standard).


--- Quote from: MathWizard on July 08, 2023, 01:42:13 am ---Or do you always have to have the AWG tied to the scope, and all with 50ohm coax and terminators and all that stuff ?

--- End quote ---
You always have the AWG "tied to the scope", either via ethernet or USB.


--- Quote from: MathWizard on July 08, 2023, 01:42:13 am ---I still don't have any of that stuff, I might have a M-M 50ohm cable if 1 came with the 2042x. Besides that, I only have the cables that they sell with $20 scopes, with BNC on 1 end, and aligator clips on the other, and I think they are just sub 1 ohm wires.

--- End quote ---
You seem to have a misconception with the 50 ohms standard, I'm afraid. It's not so that you can measure 50 ohms with your multimeter, because this is not a wire resistance, but the characteristic impedance, which in turn has to do with the dimensions and geometry of the center wire and its shielding - and the dielectricum between them.

The cables with crocodile clips on one end are usually 50 ohms as well, albeit mostly inferior quality. This is less of a concern at low frequencies, but especially the Bode Plotter could suffer from high crosstalk, caused by cheap cables with inefficient shielding.

However the most important prerequisite for using the 50 ohms technique in any test setup is to make sure you have 50 ohms interfaces on your DUT. This will be the case for lab gear and professional RF modules, but neither for audio circuits nor passive RC-structures thrown together on a breadboard. Use high impedance probes (maybe together with suitable termination resistors to satisfy the needs of the DUT ports) in all these cases - and tell the Bode Plotter the correct value of the termination resistors whenever you want to measure power (dBm). This setting is meaningless for voltage measurements (dBV).

gustavo61:
Hello people, I am from Argentina, I have the sdg2042x a couple of years ago, I never updated it, it has the version 2.01.01.21r2 and I tried to do the trick, but when I get there, activate the dhcp, it does nothing, it puts everything at 0.0.0.0, I connect it to a lenovo 480, install it putty and nothing I'm doing wrong I need help thanks in advance :scared:

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