Products > Test Equipment

Siglent SDS1104X-E and SDS1204X-E: Bode plot with a non-Siglent AWG

<< < (19/35) > >>

cncjerry:
Here's some interesting findings, at least to me :-DD.  I was measuring a Microchip SLP-27+ DC low pass filter used on the references for my phase noise measuring system.

The AD9910 seems to have a level issue below 10Mhz.  I have to look into that.  I know it is transformer coupled.  So in order to use it for this application it would need to have an amp and lookup table that would be written into the driver.  Then again, it only costs around $110, but it is a very clean DDS.

I also had to add a 1 second delay between frequency changes, maybe it can be reduced with faster serial settings, I was using 115200.

I then ran it using and HP8648C.  You can see the output on the low end of the amplitude scale is pretty flat.  I tried it with and without a delay in the code, without much change, if any:

And with a delay.

Sorry, the images are sequentially listed below.  Don't know why they didn't insert.


My SDS1032x comes tomorrow and I'll try that out as well.

cncjerry:
Here's something I don't understand.  If you check above, the image from the 8648c is pretty flat across, slightly above 29dB.

I ran it again and now it is displaying as slightly above 26dB yet the voltage, as displayed on the line above the buttons, is roughly the same as the previous run, ~735mv.
Any idea what would be causing this?  Nothing changed, just went out and back into the Bode plot function.

SMB784:
Has anyone tried to do Bode plotting with a Rigol DG811/DG992?  Is it feasible?

puterboy:
Wondering whether it would be possible to rewrite the code in say bash script and then run the code directly on a rooted Siglent 1104.
The reason I say bash is so as not to have to load python and all its libraries and dependencies in the Siglent flash -- and while kludgy, bash is pretty powerful as a scripting language.
If so, then presumably the code could be written to Siglent flash, triggered from a web page and then you would just need a USB cable from the Siglent to the external signal generator.

This would make it as good (presumably) as the native version that controls a Siglent AWG.

2N3055:

--- Quote from: puterboy on February 21, 2022, 02:38:19 pm ---Wondering whether it would be possible to rewrite the code in say bash script and then run the code directly on a rooted Siglent 1104.
The reason I say bash is so as not to have to load python and all its libraries and dependencies in the Siglent flash -- and while kludgy, bash is pretty powerful as a scripting language.
If so, then presumably the code could be written to Siglent flash, triggered from a web page and then you would just need a USB cable from the Siglent to the external signal generator.

This would make it as good (presumably) as the native version that controls a Siglent AWG.

--- End quote ---

Sounds cool but:
how do you connect from scope to that internal service? TCP/IP ?
Over loopback?  On same 111 and 5024 and 5025 ports scope is already using for itself?

Why do all that crap to the scope when RaspberyPi is so cheap? It makes no sense to me...

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod