Edge Definition; Algorithm Definitions; Delay - HP 54501A Operation Reference

Edge Definition

Algorithm
Definitions

delay

Both rising and falling edges are defined as transitional edges that must
cross three thresholds.
A
rising edge must cross the lower threshold in a positive direction
(defining it as a rising edge), cross the mid threshold (any numher of
crossings, both positive and negative are permissible) and then cross the
upper threshold without any crossing of the lower threshold.
A
falling edge must cross the upper threshold in a negative direction,
cross the mid threshold (any number of times), and then cross the lower
threshold without crossing the upper threshold.
Most time measurements
first crossing o f the middle threshold.
Following are the definitions that all measurements are based on:
There are three types of delay measurement:
•
jitter
•
standard
•
user-defined
Jitter occurs only under the following cir
•
standard/user-defined key
•
two delay parameters are the same
•
display mode is envelope
Note
are
made based on the position o f
cnm.s
tances:
is
set to standard
the
Algorithms
A -3