Products > Test Equipment
New Hantek DSO2X1X models?
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Aldo22:

--- Quote from: DavidAlfa on February 16, 2024, 03:07:40 pm ---It's probably the RAM, happened to me too. I just leave it stock, OC only the CPU.
You'll get nothing out of that extra 5% OC else that lockups.

--- End quote ---
Thank you.
I had MEM_OC_PLL_N=15, now trying with 13
Aldo22:
I wrote a little script to measure frequency response with the Hantek.
It's my first Python script longer than 3 lines, so...,  but maybe someone will find it useful.  ;)

Requires pyvisa and gnuplot. I only tested it on Linux. It may also run on other systems with small adjustments.

You can choose between three (cheap) signal generators or add your own:
Hantek internal sg.
Feeltech fy3200: Two channels, phase measurement
Tinysa: Higher bandwidth.

The code is attached and there is a small README.md in the zip.
If anyone would like to try it and has any questions, please ask!
Attention, it is quite slow!
So don't choose too many points for initial tests.
But you can just let it run and don't have to worry about it.

EDIT: BUG FIXED
A new zip is attached.
I mixed up FFR (the time between the first falling edge of source 1 and the first rising edge of source 2) and FRR (the time between the first rising edge of source 1 and the first rising edge of source 2).
The bug was not immediately obvious.  :palm:

Pictures:

10db_att_internal.png
10dB Attenuator, internal SG

30M_30P_tinysa.png
30MHz LPF from RF Demo Kit with tinysa

6.5_internal.png
6.5MHz BSF from RF Demo Kit with tinysa

6.5m_40_feeltech4.png
6.5MHz BSF from RF Demo Kit with fy3200, second channel with phase. 40 points.
Aldo22:

--- Quote from: DavidAlfa on February 16, 2024, 03:07:40 pm ---It's probably the RAM, happened to me too. I just leave it stock, OC only the CPU.
You'll get nothing out of that extra 5% OC else that lockups.

--- End quote ---
Yes, avoiding to overclock the RAM prevents occasional lockups after startup.  :-+
phmarek:
Hmmm, thanks, but doesn't help -- resp. the key default setup doesn't seem to work at all.

I removed the files from /data/setup (looked promising as last.pho was 0 bytes!) but that didn't help either.

Ah, thanks! /dso/etc/aslf/ is the directory with settings - moving that away and rebooting fixed the DSO!


Merci!
Aldo22:

--- Quote from: phmarek on February 17, 2024, 06:25:24 pm ---Ah, thanks! /dso/etc/aslf/ is the directory with settings - moving that away and rebooting fixed the DSO!

--- End quote ---

Interesting.
Can you explain what was going on?
What can go so wrong with "settings" that the keys no longer work, as you wrote?
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