16-08-2013, 01:56 PM
I was testing how fast the scope can sweep. My homemade signal generator is only capable to provide a 50kHz (in fact maybe 53 or 54 kHz) signal so that was the fastest signal I could apply. Anyway, I'm very happy with the results.
As the range sellector is not fitted yet, I use a 5M potentiometer as in the Serviscope Minor and I tried to get the same picture as in the C1-124.
With the C1-124 at 2uS/div, the 50kHz signal appears as a complete cycle in the screen. I was able to get that in my scope too.
Then I decided to go faster and I set the C1-124 at 0,5uS/div. The 50kHz signal appears just as a portion of a cycle. And then I was able to get the same pattern in my scope. This means that if I would had applied a 1MHz signal to my scope. This signal would had appeared showing a cycle in two divisions. That's great for me!!!
I have gotten this sweep using two 47pF capacitors in series (23,5pF). I will try with a 10pF capacitor to see if I can get a faster sweep, cause there is a point at which it simply stop sweeping, at least while moving the potentiometer.
As the range sellector is not fitted yet, I use a 5M potentiometer as in the Serviscope Minor and I tried to get the same picture as in the C1-124.
With the C1-124 at 2uS/div, the 50kHz signal appears as a complete cycle in the screen. I was able to get that in my scope too.
Then I decided to go faster and I set the C1-124 at 0,5uS/div. The 50kHz signal appears just as a portion of a cycle. And then I was able to get the same pattern in my scope. This means that if I would had applied a 1MHz signal to my scope. This signal would had appeared showing a cycle in two divisions. That's great for me!!!
I have gotten this sweep using two 47pF capacitors in series (23,5pF). I will try with a 10pF capacitor to see if I can get a faster sweep, cause there is a point at which it simply stop sweeping, at least while moving the potentiometer.
