aberration following the
By setting the
offset to
V and
I
the sensitivity to 1
aberrations of just 0.1% of the
will be 25 divisions in amplitude (0.1% of 25 V is 25
or 25
divisions at
ultimately reach
accuracy will determine how far that
the
value). The
to
to
fraction of its equilibrium value is exceptional. The time it takes
settle within a stated fraction of the equilibrium
is its overdrive
time.
Measuring the overdrive recovery time of an
takes
care and can
lead to some surprising results. An
experiment is to use a very flat
generator, such as the Tektronix
506, to
the
the
generator’s
to the
input
short (one foot or less)
coaxial cable and
input impedance.
the pulse
to
volt Set the
sensitivity to
division
represents
0.1% of the input signal. Trigger the
and observe the recovery of
the
using
sweep rate. Now
the cable length by
about three feet (for example, use a
length of RG58 cable, Tektronix
part
and observe the new waveform. See Figure
Figure
recovery using long
and short (bottom) cables
terminated in
offset
divisions and the photograph is a
double
1
User’s Reference Supplement
