Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Generating 400MHz external clock (Cyclone V)

Hello, I'm trying to generate a 400MHz clock signal from my Cyclone V in order to drive the clock input for an external ADC, but I'm getting severe attenuation on the clock signal. Details: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Thank you Dave,

It does look like a sine wave yes, but shouldn't the amplitude of the fundamental 400MHz sine wave still not be severely attenuated with 1GHz scope? The fundamental should have higher amplitude than the overall square wave.

edited: changed first harmonic to fundamental