Sigurthr
0
- Joined
- Dec 11, 2011
- Messages
- 4,364
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You misunderstand. It's not a voltage derating.
Here's an example: 1mhz 50Vp-p input
On a 1mhz scope you'd see 25vp-p. Signal appears as 3dB down.
On that 1mhz scope a 10mhz 50vp-p signal appears as ~50mVp-p; ~9dB down. *math not double checked.
See you see higher frequencies weaker and weaker, the 300V pk is the physical limit of the hardware. Get a 10x probe and it becomes 3kV. (Typically probes are rated to 600V though even when 10x, but HV probes do exist. I have a 100x 2kV one).
Here's an example: 1mhz 50Vp-p input
On a 1mhz scope you'd see 25vp-p. Signal appears as 3dB down.
On that 1mhz scope a 10mhz 50vp-p signal appears as ~50mVp-p; ~9dB down. *math not double checked.
See you see higher frequencies weaker and weaker, the 300V pk is the physical limit of the hardware. Get a 10x probe and it becomes 3kV. (Typically probes are rated to 600V though even when 10x, but HV probes do exist. I have a 100x 2kV one).