Agilent Technologies 4395A - Page 411

Markers
P
eak
Denition
The
search
function
provides
the
dene
peak
feature
,
which
species the
properties of
the
peaks
searched
for
by
the
peak
search function.
The dene
peak feature
also allows
the peak
search
function
to
discriminate
peaks
from
noise.
The
peak
denitions
are
dierent
for
the network
analyzer mode
and the
spectrum analyzer
mode
.
P
eak
Denition
for
Network
Analyzer
Mode
The
following
parameters
are
used
in
the peak
denition for
the network
measurement:
P
eak
polarity
(positive
or
negative)
1X,
1Y
(gradient)
Threshold
value
The
search
functions
search
for a
peak where
the parameters
of
the
peak
match
the
following
conditions:
The
search
functions
search
for
a
peak
where
the
parameters
of
the peak
match
the
following
conditions:
1
Y
1
X
2
S
P
AN
(
N
O
P
0
1)

min(1y
L
,
1y
R
)
and
Threshold

P
eak
Amplitude
V
alue
where:
1y
L
,
1y
R
are
the
dierence
in
amplitude
value
between
a
peak
and
the
adjacent
measurement
points
on
both
sides
.
That
is
,
the
search
functions
search
for
a
peak
where,
the
gradient
is
greater
than
1Y/1X,
and
the
amplitude
is
greater
than
the
threshold
value
.
The
search functions
ignore a
peak
when
the
amplitude
value
is
less
than
the
threshold
even
if
the
peak polarity
is set
to
negative
.
Figure A-20. Peak Denition for Network Analyzer Mode
Basic Measurement Theory A-35