Agilent Technologies 4395A - Page 282

Measuring
Transmission
Characteristics
of a
Filter (NA
Mode)
display
. Sub-marker
1on
the
trace
shows
the
passband
center
frequency
while
sub-markers
2
and 3
show
the
location
of
the
0
6
dB
cuto
points
.
Figure
10-3.
Using
the
Marker
to
Determine
6
dB
Bandwidth
T
o
have
the
4395A
calculate
the
bandwidth
between
other
power
levels
,
select
N
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
WIDTH
VALUE
and
enter
the
number
(for
example
,
enter
0
3
4
2
1
5
for
0
3
dB).
Press
4
Ma
rk
er
5
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
PRESET
MKRS
when
you are
nished
with
this
measurement.
Ripple
P
assband
ripple
is
the
variation
in
insertion
loss
over
a
specied
portion
of
the
passband.
1.
Press 4
Displa
y
5
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
DUAL CHAN
on
OFF
to
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
ON off
to
display
channel
2
below
channel
1.
2.
Press
4
Sw
eep
5
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
COUPLED
CH
ON
off
to
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
on
OFF
.
3.
Press
4
Ma
rk
er
5
4
8
5
4
3
5
4
.
5
4
1
5
4
6
5
4
M/

5
.
4.
Press 4
Ma
rk
er
!
5
N
N
N
N
NN
NN
NN
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
MKR !
XCH MENU
N
N
N
N
NN
NN
NN
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
N
N
N
N
N
ZOOMING APERTURE
4
1
54
0
54
2
1
5 .
5.
Press
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
MKR XCH
ZOOM
.
6.
Press 4
Chan 2
54
Search
5
N
N
NN
N
N
N
N
N
N
N
MAX . Then press
4
Marker !
5
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
MKR ! REFERENCE 4
Scale Ref
5
N
N
NN
N
N
N
N
N
N
N
N
N
N
N
NN
N
N
N
N
N
N
N
N
N
N
NN
SCALE/DEV 4
1
5
4
2 1
5 to
magnify the trace and resolve the ripple
.
7.
Press 4
Search
5
NNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
N
SEARCH: PEAK
. Then
press 4
Marker
5
NNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNN
1MODE MENU
NNNNNNNNNNNN
NN
1MKR .
8.
Press 4
Search
5
NNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNN
SEARCH: PEAK
NNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNN
PEAK DEF MENU
NNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
PEAK PLRTY POS neg
to
NNNNNN
NNNNNNNNNNNNNNNNN
pos NEG
. Then
press
NNNNNNNNNNNNNNNNNNNN
RETURN
NNNNNNNNNNNNNNNNNNNN
RETURN
NNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNN
SEARCH: PEAK
. The passband ripple is automatically given as the
peak-to-peak variation between the markers
. The ripple value is displayed at the upper
right of the display. Depending on the peak size, you may need to dene the peak size using
the peak denition feature of the 4395A.
10-4 Examples of Applications