Tektronix TDS 410A User Manual

Appendix B: Algorithms
TDS 620A, 640A, & 644A User Manual
AĆ19
3. From TLR , continue the search, looking for a crossing of HighRef . Update
TLR if subsequent LowRef crossings are found. If a HighRef crossing is
found, it becomes the high rise time or THR . (Use linear interpolation if
necessary.)
4. RiseTime = THR – TLR
High
HighRef
LowRe
f
Lo
w
THRTLR
Rise Time
Figure A-3: Rise Time
RMS:
Amplitude (voltage) measurement. The true Root Mean Square voltage.
If Start = End then RMS = the (interpolated) value at Waveform[Start] .
Otherwise,
RMS =
ŕ
End
Start
Ă( Waveform ( t ))
2
dt
( End * Start ) SampleInterval
Ǹ
For details of the integration algorithm, see below.
Integration Algorithm
The integration algorithm used by the digitizing oscilloscope is as follows:
ŕ
B
A
W ( t ) dt
is approximated by
ŕ
B
A
W
^
( t ) dt
where:

Tektronix TDS 410A Specifications

General

Brand	Tektronix
Model	TDS 410A
Category	Test Equipment
Language	English