Measuring Swept
Harmonics
The
analyzer
has
the
unique capability
of measuring
swept second
and third
harmonics as
a
function
of
frequency
in
a
real-time
manner.
Figure 2-47
displays the
absolute power
of the
fundamental
and
second
harmonic
in
dBm.
Figure 2-48
shows the
second harmonic's
power
level
relative
to
the
fundamental
power
in dBc
.F
ollow the
steps listed
below to
perform these
measurements
.
1.
Press
4
CHAN
1
5
4
MEAS
5
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
Trans:
FWD
S21
(B/R)
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
INPUT
PORTS
N
N
N
N
N
B
to
measure
the
power
for
the
fundamental
frequencies
.
2.
Press
4
CHAN 2
5
4
MEAS
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
INPUT
PORTS
N
N
N
N
N
B
to
measure
the
power
for
the
harmonic
frequencies
.
3.
Set
the
start
frequency
to
a
value greater
than 16
MHz.
4.
Press
4
MENU
5
and
select
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
COUPLED
CH
OFF
.
Uncoupling
the
channels
allows
you
to
have the
separate
sweeps
necessary
for
measuring
the
fundamental
and
harmonic
frequencies
.
5.
Press
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
POWER
and
select
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
CHAN POWER
[COUPLED]
.
Coupling
the
channel
power
allows
you
to
maintain
the
same
fundamental
frequency
power
level
for
both
channels
.
6.
Press
4
MENU
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
POWER
and
set
the
power
level
for
both
channels
.
7.
Press
4
DISPLA
Y
5
and
select
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
DUAL
CHAN
ON
.
8. Press
4
MARKER
5
and
position marker
to
desired
frequency
.
Figure 2-47. Fundamental and 2nd Harmonic P
ower Levels in dBm
Press
4
SYSTEM
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
HARMONIC MEAS
NNNNNNNNNNNNNNNNNNNN
SECOND
.You can view both the fundamental power and
harmonic power levels at the same time. (Refer to Figure 2-47.)
9.
Press
4
CHAN 2
54
DISPLAY
5
NNNNNNNNNNNNNN
MORE
and select
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
D2/D1 toD2 ON
. This display mode lets you see
the relationship between the fundamental and second or third harmonic in dBc. (Refer to
Figure 2-48.)
2-66 Making Measurements
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