Altera SDC and TimeQuest API - Manual (Page 37)

Chapter 2: SDC and TimeQuest API Package and Commands 2–27
sdc
© December 2009 Altera Corporation SDC and TimeQuest API Reference Manual
# Apply a simple 2.000 ns source latency to the system clock.
set_clock_latency -source 2.000 [get_clocks SYSCLK]
# Specify feedback clock latencies between output port outclk
# and the output port fdbkclk.
set_clock_latency -source -late -rise 0.800 [get_clocks FDBKCLK]
set_clock_latency -source -late -fall 0.750 [get_clocks FDBKCLK]
set_clock_latency -source -early -rise 0.500 [get_clocks FDBKCLK]
set_clock_latency -source -early -fall 0.460 [get_clocks FDBKCLK]