Appendix B: Algorithms
TDS 620A, 640A & 644A User Manual AĆ13
High
HighRef
LowRef
Low
TLFTHF
FallTime
Figure AĆ2:ăFall Time
Frequency
 $&#%  #!#  % !#  $&#  #%+ +
(# + * !# $ 
 Period # $ %#($  #%&#  ## #
FrequencyPeriod
High
 $% ' % ## '&  ,  ( ##  %$
$% 
$ % -) $&#% %"&
High Max
Low
  ($% ' % ## '& &%  ,  ( ## 
%$ $% 
$ % -) $&#% %"&
Low Min