Tektronix 475A - MIX {Basic 475 A); Measurements; Fig. 28. Risetime

Fig. 28, Point A). Note the DELAY TIME POSITION dial EXAMPLE: The A TIME/DIV switch is set to 1 us. The
setting. DELAY TIME POSITION dial setting at point A (Fig. 28) is
2.50 The DELAY TIME POSITION dial setting at point B
Use the DELAY TIME POSITION dial to move the start (Fig. 28) is 7.50. To find the risetime use the formula:
of the intensified zone to just touch the intersection of the
signal
and
the
90%
graticule
line
(see
Fig.
28,
Point
B).
Time
|
ar
ii
Note
the
DELAV
TIME
POSITION
dial
setting.
Difference
—
Isetime
=
Substitute
the
DELAV
TIME
POSITION
dial
settings
in
second
first
delay
time
the
time
difference
formula
to
find
the
risetime.
dial
=
dial
X
(A
TIME/DIV
setting
setting
setting)
INTENSIFIED ZONES Substituting the given values:
am A | TT Nøt MIX (BASIC 475A)
if ME a zus H "MEASURE | For the MIX mode of operation, the same general
SIGNAŁ | > AE — TIME procedures can be used. With the first part of the display at
AMPLITUDE Trøtt
| LL ETEN jf | FROMATOB a sweep rate set by the A TIME/DIV switch and the second
part of the display at a sweep rate set by the B TIME/DIV
switch, it is not necessary to switch display modes to
ensure location of the correct pulse.
HORIZONTAL However, inaccuracies are introduced into the
DISTANCE measurement by the transition from A to B sweeps. The B
(465/0M-0-11)2039-29 å 3
DLYD mode is the most accurate and therefore
recommended mode of making differential time
Fig. 28. Risetime. measurements.
@ ; | 475A/DM44 Operators 53