Tektronix THS3024 4- Channel hand-held oscilloscope, Scope-Meter, hand-held THS3024 Information Guide
Product codes
THS3024
RISE TIME
While analog engineers look at bandwidth, digital engineers are more
interested in the rise time of signals like pulses and steps.
interested in the rise time of signals like pulses and steps.
What you need
The faster the rise time, the more accurate are the critical details of fast transitions.
Fast rise time is also needed for accurate
Fast rise time is also needed for accurate
time measurements.
Rise time is defined as, where k is between 0.35 (typically for scopes
with bandwidth <1 GHz) and 0.40 to 0.45 (>1 GHz).
with bandwidth <1 GHz) and 0.40 to 0.45 (>1 GHz).
Similar to bandwidth,
an oscilloscope’s rise time should be < 1/5 x fastest
rise time of signal.
E.g. a 4-ns rise time needs a scope with faster than 800 ps rise time. Note:
As with bandwidth, achieving this rule of thumb may not always be possible.
E.g. a 4-ns rise time needs a scope with faster than 800 ps rise time. Note:
As with bandwidth, achieving this rule of thumb may not always be possible.
TTL and CMOS may need 400 to 300 ps rise times.
your scope rise time must be fast enough to capture rapid
transitions accurately.
transitions accurately.
7
12 THINGS TO CONSIDER WHEN CHOOSING AN OSCILLOSCOPE
ß
CONTENTS
1
2
3 4 5 6 7 8 9 10 11 12 CONTACT
INTRO
www.tek.co.uk