Products > Test Equipment
FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
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rhb:

--- Quote from: Prehistoricman on December 09, 2019, 05:33:00 am ---Did you guys ever extract the built-in firmware?

I found this paper that extracted firmware from an STM32F1 series MCU 'easily':
https://tches.iacr.org/index.php/TCHES/article/download/7390/6562/
Page 9/10 (207/208)

Sounds like a fun project.

Edit:
And by an interesting coincidence, this paper specifies a FeelTech unit for generating their attack glitches.

--- End quote ---

That attack was tried and did not work on this device.   You can find the details back around pp 15-20 of this thread.

I'm a bit surprised that predistortion of the waveform never came up in this thread that I recall.  Though I have *not* read all of it.

  I recently bought a text on the use of predistorted waveforms for generating RF which is very important to cellular operations.

Have Fun!
Reg
Prehistoricman:

--- Quote from: rhb on December 26, 2019, 01:16:26 am ---That attack was tried and did not work on this device.   You can find the details back around pp 15-20 of this thread.

--- End quote ---

Really? I took a look at those pages and didn't see anything about it. I saw references to the Fraunhofer attack (which doesn't work on this STM32F1) but not the one I found.
JohnCompter:
The 60 Mhz is valid for a sine wave, but the other wave forms tend to have a sine wave form also at 60 Mhz.
The output is very sensitive for grounding currents. I lost a number of steps is the output attenuator by grounding currents.
The interface to a PC works well, but one has to climb a steep hill before the communication between PC and waveform generator operates well.
I did not found a way to transfer a waveform, made in e.g. Mathematica, in a intelligent way to the FY6800. Copy-past was the only way.

Cheap is true, but that is what you notice when you buy it. The quality belonging to cheap you will notice for ever.
 
CDaniel:
If you read the specs , the other waveforms are not specified up to 60MHz ... this is normal for every such generator , even expensive .
rhb:

--- Quote from: Prehistoricman on December 28, 2019, 10:18:49 pm ---
--- Quote from: rhb on December 26, 2019, 01:16:26 am ---That attack was tried and did not work on this device.   You can find the details back around pp 15-20 of this thread.

--- End quote ---

Really? I took a look at those pages and didn't see anything about it. I saw references to the Fraunhofer attack (which doesn't work on this STM32F1) but not the one I found.

--- End quote ---

Sorry.  I thought it was the same paper.  IIRC CyberMaus did all the work on that.
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