Appendix B: Algorithms
TDS 500D, TDS 600B, & TDS 700D User Manual
B–9
High
HighRef
LowRef
Low
TLFTHF
Fall Time
Figure B–2: Fall Time
3. From , continue the search, looking for a crossing of . Update
if subsequent crossings are found. When a crossing is
found, it becomes . (Use linear interpolation if necessary.)
4. = –
Timing measurement. The reciprocal of the period. Measured in Hertz (Hz)
where 1 Hz = 1 cycle per second.
If = 0 or is otherwise bad, return an error.
= 1/
100% (highest) voltage reference value. (See High, Low on page B–1.)
Using the min-max measurement technique:
=
Frequency
High
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