Fast switching signal output

[Altera_Forum]

Hi, i'm a student. I'm using Altera De2 Board with Cyclone II and Quartus II tool. 

1) In my project i have an output that switch fastly. The output pin don't follow it. In the oscilloscope i don't properly see the real signal . How can i tell to Quartus that the signal is fast ?  2) Another problem. I have on the board an oscillator at 50 Mhz. I want to multiplicate the frequency without using the PLL (ALTPLL MEGAFUNCTION). Is it possible? Is the clock programmable?  I hope you can help me.

[Altera_Forum]

1) how fast is your signal? If you decrease the frequency, do you see it on the oscilloscope? 

2) no

[Altera_Forum]

1) isn't a Quartus or FPGA problem. 50 MHz is send reliably with any availble FPGA I/O standard.