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Specifications
THS710A, THS720A, THS730A & THS720P Service Manual
1–5
Table 1–1: Oscilloscope specifications (Cont.)
Measurements
Cursors Voltage difference between cursors (DV)
Time difference between cursors (DT)
Reciprocal of DT in Hertz (1/DT)
Phase difference between cursors (DDegrees)
Automated
Measurements
Amplitude, Burst Width, Cycle Mean, Cycle RMS, Fall Time,
Frequency, High, Low, Max, Mean, Min, Negative Duty Cycle, Negative
Overshoot, Negative Width, Pk – Pk, Period, Positive Duty Cycle,
Positive Overshoot, Positive Width, Rise Time, and RMS
Voltage and Current Harmonics (THS720P)
Number of Harmonics First 31 harmonics of signal with fundamental frequency between
30 Hz and 450 Hz
Ha
rm
onic
s
Amp
litu
de
Accuracy
Accuracies below are stated as a percent of the fundamental amplitude
and are valid only if peak-to-peak amplitude is ≥4 divisions and number
of averages ≥16
Fundamental 2 – 11 12 – 21 22 – 31
±2.5% ±2.5% ±4% ±4%
Ha
rm
onic
s
Pha
se
Ary
Fundamental 2 – 11 12 – 21 22 – 31
A
ccu
r
ac
y
— ±4 ° ±8 ° ±8 °
THD-F Measurement Total harmonic distortion relative to the fundamental amplitude
THD-F +
V
2
RMS
* V
2
f
Ǹ
V
f
or
A
2
RMS
* A
2
f
Ǹ
A
f
THD-F Accuracy ±4%
THD-R Measurement Total harmonic distortion relative to the RMS amplitude
THD-R +
V
2
RMS
* V
2
f
Ǹ
V
RMS
or
A
2
RMS
* A
2
f
Ǹ
A
RMS
THD-R Accuracy ±4%
Frequency Accuracy ±0.2% of reading
Power Measurements (THS720P)
True Power
Measurement
W +
1
n
ȍ
n
V
n
A
n
measured over an integral number of cycles that
contain n sample points
Apparent Power
Measurement
VA + V
RMS
A
RMS
Reactive Power
Measurement
VAR + (VA)
2
* W
2
Ǹ
Power Measurements
Accuracy
±4% at the BNCs (not including probe uncertainty)