Example Of Use; Measurement Of Duty % (With External Input) - Chauvin Arnoux C.A 25 Mode D'emploi

MEASUREMENT OF DUTY % ON AN EXTERNAL INPUT
The use of the external input requires the connection of the FRB connector supplied
with the instrument at the source of the signal to be measured, then the connection
of this connector to the socket marked EXT.
Let us suppose that we have a signal of the type shown in the following figure:
Here the frequency of the signal is given by the formula :
1
f =
T
T= 5 x 1 ms = 5 ms
1
So f =
-3
5.10
The duty % is given by
t
1
Duty =
t + t
1 2

EXAMPLE OF USE

t
1
T
= 200 Hz
1V/DIV
t
2
0
81
1 ms/DIV