Agilent Technologies 4395A - Page 409

Markers
1Mode
With
the
use
of
a
delta
marker
,
a
delta
marker mode
is available
that displays
both the
sweep
parameter
and
measurement
values
of
the
marker relative
to the
reference.
Any position
on
the
trace
or
a
xed
point
can be
designated as
the delta
marker.
The 1marker
can be
put on
a
current
position
of
the
marker
.If
the delta
reference is
the xed
1marker,
both its
sweep
parameter
value
and
its
magnitude
value
(y-axis
value)
can
be
set arbitrarily
anywhere in
the
display
area
(not
necessarily
on
the
trace).
If
the
delta
marker is
the tracking
1marker,
its
sweep
parameter
value
can
be
controlled
and its
measurement value
is the
value of
the
trace
at
that
sweep
parameter
value
.
Marker
Search
Function
Markers
can
search
for
the
trace
maximum/minimum,
mean
point,
any
other
point,
peak
maximum/minimum
or
peak-to-peak
value
of
all
or
part
of
the
trace
.
The
marker
and
sub-markers
can
be
used
together
to
search
for
specied
bandwidth
cuto
points
and
calculate
the
bandwidth.
Statistical
analysis
uses
markers
to
provide
a
readout
of
the
mean,
standard
deviation,
and
peak-to-peak
values
of
all
or
part
of
the
trace
.
Width
Function
The
bandwidth
search
feature
analyzes
a
bandpass
or band
reject trace
and calculates
the
center
point,
bandwidth,
and
Q
(quality
factor)
for
the
specied bandwidth.
These parameters
depend
on the
1marker mode
.
The
following
table
shows
how
each
parameter
is
determined
for
each 1marker
mode.
T
able
A
-1. Obtaining
P
arameters
in
1
Marker
Mode
P
arameter
Tracking
1 marker
Fixed
1 marker
B
W
Displays
the
bandwidth
value
set
by
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
FF
F
F
F
F
F
WIDTH
VALUE
.
center Displays
the
center
sweep
parameter
value
between
the
cuto
points
(this
is marked
by
sub-marker
1).
Q Displays
the
Q
value
(=
cent/BW) of
the trace
.
Insertion Loss Displays the
absolute value
of the
marker
.
Displays the
dierence between
the marker
and
the
xed
1marker
.
1F
(Left)
Displays
the
sweep
parameter
value dierence
between
marker
2
and
the
center
frequency
specied
by the
4
Center
5
key.
Displays
the
sweep
parameter
value dierence
between
marker
2
and
the
xed
1marker
.
1F (Right) Displays the sweep parameter value dierence
between marker 3 and center frequency
specied by the
4
Center
5 key.
Displays the sweep parameter value dierence
between marker 3 and the xed 1marker
.
Figure A
-19 shows an example of the bandwidth search feature
.
Basic Measurement Theory A-33