Tektronix 475A - Pulse Jitter Measurements; Pulse Jitter

EXAMPLE:
If
the
sweep
rate
were
increased
10
times
with
the
magnifier,
the
magnified
sweep
rate
would
be
45°
=
10
=
4.5°/division.
Fig.
22
shows
the
same
signals
as
used
in
Fig.
21
but
with
the
X10
MAG
switch
set
to
X10.
With
a
horizontal
difference
of
6
divisions,
the
phase
difference
is:
horizontal magnified
Phase = |
| = difference X sweep rate
Difference ae ‘
(divisions) (degrees/div)
Substituting the given values:
PULSE JITTER
MEASUREMENTS
Be sure the VAR TIME/DIV switch is in the calibrated
detent. Set the B TIME/DIV switch to intensify the full
rising portion of the pulse. Set the HORIZ DISPLAY switch
to B DLY'D.
MEASURE
TIME FROM
1738-34
Fig. 23. Pulse jitter.
14
Pulse jitter is shown by horizontal movement of the
pulse and includes the inherent jitter of the Delayed
Sweep (see Fig. 23). Multiple the distance by the B:
TIME/DIV switch setting to obtain pulse jitter time.
44
|
475A/DM44
Operators
.
@