Products > Test Equipment

Hacking the HDO1k/HDO4k Rigol 12 bit scope

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Cees:

--- Quote from: lownoise on December 20, 2023, 12:50:42 pm ---
--- Quote from: TurboTom on December 20, 2023, 11:16:31 am ---Whatsoever, the fan speed reduction definitely is an improvement, but to really silence the scope, my take is that the fans would need to be replaced.


Agreed ;)
I replaced the original Fans Protechnic MGA6012MR-O15 (60x15) with Noctua NF-A6x25 - they fit 1:1 without any problems.
I have also fitted silicone frames under the fans.
The airflow and temperatures are the same, but the noise level is pleasantly quiet now :)

--- End quote ---



Is  Noctua NF-A6x25 the real part number as I see only the  three and four wires versions


--- End quote ---

lownoise:
There are these two versions only, you can use both (12V):   NF-A6x25 PWM   ( 4wire, required wires: yellow/black )
                                                                                        NF-A6x25 FLX     ( 3wire, required wires:     red/black )

The scope has 2pin fan-connectors, no speed-signal. 
 
I removed the noctua-plug + the stiff cable sleeve and crimped the matching plug (JST XH 2.54, 2pin) to the Noctua wires.

You can also solder the cable + connector from the stock fan, or searching for 3..4pin -> 2pin fan adapter cable...

sizziff:
My experiments with vendor.bin :
I assembled a generator on LTC6905 SOT-23-5 at ~60 MHZ (Rise time 0,5ns)
I put vendor.bin in DHO1072 scope for DHO4804, here's what happened:

Lochstreifen:
The DHO4000 interleaves its 2 ADCs to achieve 4GS/s.
The DHO1000 has only one ADC. So every second sample is missing and the frequency appears to double. It is surprising that it works at all.
It would be more promising to experiment with the DHO2000 vendorl.bin.

sizziff:

--- Quote from: Lochstreifen on May 08, 2024, 02:00:12 pm ---The DHO4000 interleaves its 2 ADCs to achieve 4GS/s.
The DHO1000 has only one ADC. So every second sample is missing and the frequency appears to double. It is surprising that it works at all.
It would be more promising to experiment with the DHO2000 vendorl.bin.

--- End quote ---

I tried to put "DHO2000 vendorl.bin." (2404 and something like that) and the oscilloscope loaded and worked, but I did not find any profit. In the case of 4804, the 400 MHz band of the input path is unlocked and this is cool, although there are problems with the readings, but the time just needs to be multiplied by 2, and the frequency divided by two. It's a pity there is no working patch to unlock the bandwidth to 400MHz for the DHO1000...

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