Agilent Technologies Agilent 4396B User Manual
Page 78
AM
Signal
Measurement
In
this
example
,
the
following
parameters
for
AM
signal
measurement
are
derived:
Carrier
amplitude
(E
c
)
and
frequency
(f
c
)
Modulating
frequency
(f
m
)
and
modulation
index
(m)
T
est
Signal
The
following
test
signal
is
used
in
this
example:
AM
Signal
Frequency
(f
c
):
100
MHz
Modulating
signal
frequency
(f
m
):
10
kHz
Modulation
index
(m):
15%
Measurement
Setup
Connection
Connect
the
test
signal
source
to
the
S
input.
Analyzer
Settings
Press
4
Preset
5 .
Then
set
the
analyzer's
controls
as
follows:
Desired
Settings
K
ey
Strokes
A
ctive
Channel
Block
Select
channel
1
4
Chan
1
5
(default)
Measurement
Block
Select
Spectrum
Analyzer
Press
4
Meas
5
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
ANALYZER
TYPE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
SPECTRUM
ANALYZER
Select
S
input
4
Meas
5
FFFFFFFFFFFFFFFFFFFFFFFFFF
SPECTRUM:S
(default)
Sweep
Block
Center
frequency
100
MHz
Press
4
Center
5
100
4
M/
5
Span
frequency
200
kHz
Press
4
Span
5
200
4
k/m
5
Carrier
Amplitude
and
Frequency
Measurement
Using
the
Marker
Press
4
Scale
Ref
5
and
enter
the
reference
value
if
the
trace
needs
to
be
rescaled.
1.
Press
4
Search
5
to
turn
the
marker
on.
2.
Press
NNNNNNNNNNN
MAX
to
search
for
the
carrier
signal.
The
carrier
amplitude
and
frequency
are
displayed
in
the
upper
right
corner
as
shown
in
Figure
4-12.
4-10
Spectrum
Measurement
Examples