HP 8753D - Page 263

Increasing Dynamic
Range
Dynamic
range
is
the
dierence between
the analyzer's
maximum allowable
input level
and
minimum
measurable
power
.
F
or
a measurement
to be
valid, input
signals must
be within
these
boundaries
.
The
dynamic
range
is
aected by
these factors:
test
port
input
power
test
port
noise
oor
receiver
crosstalk
T
o
Increase
the
T
est
P
ort
Input
P
ower
Y
ou
can
increase
the
analyzer's
source
output
power
so
that
the
test
device
output
power is
at
the
top
of
the
measurement
range
of
the
analyzer
test
port.
Press
4
MENU
5
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
POWER
and
enter
the
new
source
power
level,
followed
by
4
x1
5
.
Caution
TEST
PORT
INPUT D
AMAGE
LEVEL:
+26
dBm
T
o
Reduce
the
Receiver
Noise
Floor
Since
the
dynamic
range
is
the
dierence
between the
analyzer's input
level
and
its
noise
oor
,
using
the
following
techniques
to
lower
the
noise oor
will increase
the
analyzer's
dynamic
range
.
Changing
System
Bandwidth
Each
tenfold
reduction
in IF
(receiver)
bandwidth
lowers
the
noise
oor
by
10
dB
.
F
or
example
,
changing
the
IF
bandwidth from
3
kHz
to
300
Hz,
you
will
lower
the
noise
oor
by
about
10
dB
.
1.
Press
4
A
V
G
5
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
IF
BW
.
2.
Enter
the
bandwidth
value
that
you want,
followed by
4
x1
5
.
Changing
Measurement
A
veraging
Y
ou
can
apply
weighted
averaging
of
successive
measurement traces
to remove
the eects
of
random
noise
.
1.
Press
4
A
V
G
5
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
AVERAGING
FACTOR
.
2. Enter a value followed by
4
x1
5 .
3.
Press
NN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNN
AVERAGING ON .
Refer to
the \Application and Operation Concepts" chapter for more information on
averaging.
5-56 Optimizing Measurement Results