Keithley 2701

3-14 Basic DMM Operation Model 2701 User’s Manual
Figure 3-5
ACV measurements – square, pulse, and sawtooth waves
AC coupled RMS:
VP
0
V
P
CF = 1
Square
VRMS =
VP
0
-VP
Rectified square
AC coupled RMS:
VP
2
VRMS =
CF = 2
VP
0
Pulse
t
T
VRMS =
V
P
where; D (duty cycle) =
D(1-D)
t
T
D(1-D)
1
CF =
AC coupled RMS:
0
AC coupled pulse
AC coupled peak:
CF =
+V
-V
+V = VP(1-D)
-V = -V
PD
VP
0
Triangular sawtooth
-VP
RMS:
VRMS = 0.557VP
CF = 1.733
Crest factor:
VP
When; 0 < D ≤ 0.5:
When; 0.5 ≤ D < 1:
1
1-D
- 1
1
D
- 1
CF =