Tektronix 475A - Frequency Measurements (Basic 475 A); Time Duration

ozone) NAME IA i. INTENSIFIED
HORIZONTAL
DISTANCE
Fig. 26. Time duration.
Substitute the DELAY TIME POSITION dial settings
into the time difference formula to obtain the time
duration.
EXAMPLE: The A TIME/DIV switch is set to 2 ms and
the B TIME/DIV switch is set to .1 ms.
The DELAY TIME POSITION dial setting at Point A
(Fig. 26) is 1.20. The DELAY TIME POSITION dial at Point
B (Fig. 26) is 9.53. To find the time duration use the
formula:
56 475A/DM44 Operators
Time = Time |
Difference Duration
second first delay time
dial = dial X {A TIME/DIV
setting setting setting)
Substituting the given values:
Time Duration = (9.53 — 1.20) X 2 ms = 16.66 ms
FREQUENCY MEASUREMENTS
(BASIC 475A)
The frequency of a recurrent signal can be calculated
by taking the reciprocal of the time duration of one event.
EXAMPLE: The time duration of one event (Point A to
Point B, Fig. 26) is 16.66 milliseconds.
Using the formula:
1
— time duration
Substituting the given values:
1
Frequency
———e—
=
16.66 ms 60 hertz