Lecroy is pretty big in high-end oscilloscopes in the multi-GHz-range. These cost several 100s of thousands, and a lot of them use windows as the user interface - including a virus scanner... Can their low-end scopes live up to what the name Lecroy promises? Not in this case, but that is my very personal experience. And if the firmware should get fixed some day... one can dream!
Lecroy is pretty big in high-end oscilloscopes in the multi-GHz-range. These cost several 100s of thousands, and a lot of them use windows as the user interface - including a virus scanner... Can their low-end scopes live up to what the name Lecroy promises? Not in this case, but that is my very personal experience. And if the firmware should get fixed some day... one can dream!
This should be a representation of the number 1110 = 14. The small spikes are caused by interrupt code running. The low periods should have lengths of 2N, 4N, 8N. I'll have to try this again with an external trigger. There is too much jitter to get a stable image.
Measuring a phase difference seems to work in this case.
Although I'm starting to wonder where these '457.925Hz' come from. Looking at the timebase I am led to believe that it should be more 'like 8.89kHz' - something is confused again :-(
Finally!
I've received a brand new Lecroy WaveAce224 digital storage oscilloscope (reduced price promotion).
When I'm lucky I might find some time to play with it on the weekends.
The question: is the ringing real? In this case it was caused by sin(x)/x interpolation.
I was instantly suspicious as this effect only showed up at one zoom setting.
With 104µs the average bit time is pretty much on spec. A nice thing when running with a ceramic resonator. I had to tune the bit-delays to get there. The ATtiny85 unfortunately doesn't have a hardware UART.
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