Frequency And Duty Cycle Measurement - Gossen MetraWatt METRAHIT ULTRA Operating Instructionsc

5.1.5 Frequency and Duty Cycle Measurement

Ð Set the rotary switch to MHz or %.
Ð Connect the measurement cables as shown.
Make sure that a current measuring range ("A") has not been acti-
vated when the multimeter is connected for frequency or duty
cycle measurement!
!
Attention!
The applied signal voltage may not exceed 5 V.
Frequency Measurement, MHz
A 5 V signal with a frequency of up to 1 MHz is measured and dis-
played using MHz as a unit of measure. The pulse frequency is
the reciprocal value of the pulse period.
Duty Cycle Measurement t /t
E P
The ratio of pulse duration to pulse period is measured with peri-
odic square-wave signals and is displayed as a percentage.
Pulse duration (t
Duty cycle (%) =
Pulse period (t
Note
The applied frequency must remain constant during duty
cycle measurement.
GMC-I Messtechnik GmbH
)
 100
E
)
P
V/Hz/dB – , Temperature,
MHz
01.0323
%
U
015.000
002.00
t
t
E
t
P
%
Pulse Time Quantities
f pulse frequency = 1/t
P P
t pulse duration
E
t pulse period
P
t – t interpulse period
P E
t /t pulse or duty cycle
E P

V
COM
Temp
and A/Hz Measurements
MHz
f
P
kHz
FUNC
ENTER
Hz Hz
%
t /t
E P
Measuring Ranges:
fp pulse frequency range
Hz t /t
E P
15 Hz to 1 kHz 2 to 98%
Up to 10 kHz 5 to 95%
!
Max. 5 V
35