EasyManua.ls Logo

Lyons NanoVNA - Page 26

Default Icon
51 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
08/09/2020 NanoVNA User Guide | NanoVNA User Guide
https://cho45.github.io/NanoVNA-manual/#7-
トレース
状
態
26/51
MI
N
IMUM
(no
window,
ie
same
as
rectangular
window)
N
ORMAL
(corresponds
to
Kaiser
window
β
=
)
MAXIMUM
(corresponds
to
Kaiser
window
β
=
)
MI
N
IMUM
has
the
highest
resolution,
MAXIMUM
has
the
highest
dynamic
range.
N
ORMAL
is
somewhere
in
between.
Setting
the
wavelength
reduction
factor
(Velocity
Factor)
in
the
time
domain
The
transmission
speed
of
electromagnetic
waves
in
the
cable
changes
depending
on
the
material.
The
ratio
of
electromagnetic
waves
in
a
vacuum
to
the
transmission
speed
is
called
the
wavelength
reduction
factor
(Velocity
Factor,
Velocity
of
propagation).
This
is
always
stated
in
the
cable
specications.
In
the
time
domain,
the
displayed
time
can
be
displayed
in
terms
of
distance.
The
wavelength
reduction
rate
used
for
distance
display
DISPLAY
TRANSFORM
VELOCITY FACTOR
can
be
set
with.
For
example,
if
you
measure
the
cable
of
TDR
with
a
wavelength
reduction
rate
of
67
%
,
VELOCITY FACTOR
in
67
the
specied.
Set
frequency
from
marker
You
can
set
the
frequency
range
from
the
marker
as
shown
below.
MARKER
→START
Set
the
frequency
of
the
active
marker
to
the
start
frequency
MARKER
→STOP
Set
the
frequency
of
the
active
marker
to
the
stop
frequency
MARKER
→CENTER
Set
the
frequency
of
the
active
marker
to
the
center
frequency.
The
span
is
adjusted
to
keep
the
current
range
as
close
as
possible.
MARKER
→SPAN
Sets
the
two
visible
markers
to
the
span,
including
the
active
marker.
If
only
one
marker
is
displayed,
nothing
happens.
Setting
the
measurement
range