The Shmoo plot will be illustrated by measuring the
effect of power supply reduction on performance:
Nominally, a DUT operates at 1 Volt Vdd with 25 ns delay.
A set of test patterns is applied repeatedly to the DUT while sweeping:
The expected result of the measurement is:
The DUT behaves as predicted illustrating the anticipated behaviour.
Faulty behaviour may result in
other Shmoo shapes
with their specific interpretation.