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Altera_Forum
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9 years ago

Voltage level issue on MAX10

Hello, i'm trying to test my MAX10 using clock of 1MHz on some pins. one of the HW pins is not output the signal as expected, the clock goes high to 3.3v and then down to 1.6v instead of 0v. t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

How good is your oscilloscope? Or, more importantly, your scope probe. What bandwidth do they have and what loading is your probe adding to your circuit?

If the bandwidth is not 'enough', or the probes load too high, it's going to result in a very good looking waveform with reduced amplitude. To look at a 150MHz clock with any confidence I'd suggest you need at least 1GHz bandwidth on scope and probe.

Cheers,

Alex