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Altera_Forum
Honored Contributor
Honored ContributorHelp me about measure clock on osciloscope.
Hi everyone,
I have project on board DE2. I use PLL in megafunction to create the clock 500MHz from 50MHz. Then i use clock counter to decrease the clock from 500MHz to clock_out 250KHz, 125KHz, 60KHz.... and the clock_out is mapped to pin GPIO_1[0]. I use osciloscope to measure frequency of clock_out, but i can not see the the pulse ( square pulse), it only show the line . anybody know why? Thanks.12 Replies
Altera_ForumThat's right, but my project is design optimization .I must create 500MHz, 250MHz, 125 MHz... but this clock can't be measured in oscilloscope ,so i must divide this clock again. that means (250MHz <-> 250KHz, 125MHz <->125KHz...onty to show corelative clock).
- Altera_Forum
why do you create a 500MHz clock? cant you derrive your other clocks from the 50MHz one?
