Agilent Technologies 35670A Quick Start Manual page 57

Agilent 35670A Quick Start Guide
5
Configure the display.
Press [
6
Measure the signal source.
Press [
Press [
Press [
Press [
The results of the THD calculation appear at the bottom left of the analyzer's display.
The number of harmonics used to calculate THD appears at the top of the screen. The
default is 20 harmonics. (If there are fewer than 20 harmonics, the available number
of harmonics are used.) To change the number of harmonics, use the
[
NUMBER OF HARMONICS
The absolute marker, [
frequency. If the harmonic markers do not line up with the harmonics, you will need
to adjust the value of the fundamental frequency (The marker falls in the middle of the
frequency bin.) Use the arrow keys or the knob to adjust the value of the fundamental
frequency until the harmonic markers line up with the harmonics.
Harmonic
Markers
THD calculation
appears at the
lower-left of
the upper trace
display box
], then press[
Scale
AUTOSCALE ON OFF
].
Start
], then press [
Marker
MARKER TO PEAK
] [
Marker Fctn
HARMONIC MARKER
].
THD
] softkey in the [
MARKER TO PEAK
] to highlight ON.
].
] [
FUNDAMENTL FREQUENCY
] menu.
HARMONIC MARKER
], measures the amplitude of the fundamental
Making Measurements
] [ ].
Mkr Value
Fundamental freauency
Number of harmonics
used to calculate THD
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