Agilent Technologies 4395A - Page 182

Setting
the
IF/Resolution/Video
Bandwidth
Setting
the
Video
Bandwidth
(S
A
Mode)
1.
Press 4
Bw/Avg
5
.
2.
Choose
N
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
VIDEO
BW .
3.
Set the
video
bandwidth
using
the
following
keys:
T
o Use
Lower
noise level
4
+
5
,or
Shorten
sweep time
4
*
5
,or
Set bandwidth
directly 4
0
5 .
..
4
9
5 and
unit keys
When the
target signal
and the
noise
are
hard
to
distinguish
because
of
noise
variation,
narrow
the video
bandwidth. This
reduces the
noise
variations
and
makes
the
signal
clearly
visible
.
Note
,
however,
that reducing
the
video
bandwidth
slows
down
the
sweep
process
.
Y
ou
can
set
the VBW
to
a
value
that
is
1/1,
1/3,
1/10,
1/30,
1/100,
or
1/300
of
the
RBW
setting
currently
in
eect.
Resetting
the
Video
Bandwidth.
1.
Press
4
Bw/Avg
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
N
VIDEO
BW
.
2. Enter
the
same
value
as
the
RBW
setting.
Video BW 30 kHz
Video BW 300 Hz
Figure 6-17. Setting Video Bandwidth (VB
W)
6-28 Setting and Optimizing Measurement Conditions