Tektronix TDS 500C User Manual
Appendix B: Algorithms
TDS 500C, TDS 600B, & TDS 700C User Manual
B–9
High
HighRef
LowRef
Low
TLF
THF
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
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.
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