Agilent Technologies 4395A - Page 247

P
erforming
Time
Gated Spectrum
Analysis
Y
ou must
specify a
gate
length
longer
than
the
minimum
gate
length
listed
in
T
able
8-1
.
Otherwise
,the
sweep
does
not
start.
T
able 8-1.
Allowable
RWB
Settings
and
Minimum
Gate
Length
RB
W
Minimum
Gate
Length
1
1MHz 6 
sec
300
kHz
22

sec
100
kHz
44

sec
30
kHz
170

sec
10
kHz
660
 sec
3
kHz
1.4
msec
1
kHz
5.3
msec
300
Hz
22
msec
100
Hz
43
msec
30
Hz
170
msec
10
Hz
680
msec
3
Hz
1.4
sec
1
Hz
Gated
sweep
is
not
available
.
2
1 If
the
gate
control
mode
is
\level",
add
the
gate
delay
setting
to
the
listed
value
.
2
5.5
sec
when
the
gate
control
mode
is
\level".
Setting
the
Video
Bandwidth
(VB
W).
1.
Choose
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
VIDEO
BW
.
2. Set
the
video
bandwidth.
Y
ou
can
set
any
video
bandwidth
(VBW)
without
concern
for
the
gate
length setting.
The
4395A
implements
the
video
lter
using
digital
processing.
The
video
lter
of
the
4395A
requires
no
settling
time
for
normal
operation.
Therefore
,
it
is
not
aected
by the
gate length
setting.
You can also use the averaging function to reduce the variation of the trace
.
Analyzing the Measurement Results 8-45