Agilent Technologies Agilent 4396B User Manual
Page 90
3
dB
Bandwidth
The
analyzer
calculates
the
bandwidth
of
the
DUT
between
two
equal
power
levels
.
In
this
example
,
it
calculates
the
03
dB
bandwidth
relative
to
the
lter
center
frequency
.
1.
Press
4
Ma
rk
er
5 .
Then
use
the
rotary
knob
to
move
the
marker
to
the
center
of
the
lter
passband.
2.
Press
4
Search
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
WIDTH
[OFF]
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
WIDTH
on
OFF
to
NNNNNNNNNNNNNNNNNNNN
ON
off
.
The
analyzer
calculates
the
03
dB
bandwidth,
center
frequency
,
Q
(Quality
F
actor),
insertion
loss
,
and
di erences
between
the
center
frequency
and
the
cuto
frequencies
of
the
DUT
.
It
then
lists
the
results
at
the
upper
right
hand
of
the
display
.
Sub-marker
1
on
the
trace
shows
the
passband
center
frequency
and
sub-markers
2
and
3
show
the
location
of
the
03
dB
cuto
points
.
Figure
5-3.
Using
the
Marker
to
Determine
3
dB
Bandwidth
T
o
have
the
analyzer
calculate
the
bandwidth
between
other
power
levels
,
select
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
WIDTH
VALUE
and
enter
the
number
(for
example
,
enter
06
4
21
5
for
06
dB).
Press
4
Ma
rk
er
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PRESET
MKRS
when
you
are
nished
with
this
measurement.
5-4
Network
Measurement
Examples