Guide T
erms and
Conventions
The
eight
keys
along
the right
side of
the analyzer
display are
called softkeys
. Their
labels
are
shown
on
the
display
.
The softkeys
appear in
shaded boxes
in this
chapter.
For
example
,
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
TRANSMISSION
.
The
labeled
keys
that
are
on
the
front panel
of the
analyzer are
called
front-panel keys
.The
front-panel keys
appear in
unshaded boxes
in
this
chapter
.
F
or
example
,
4
SYSTEM
5
.
Analyzer
Functions
This
section
contains
an
alphabetical
listing
of
softkey
and
front-panel
functions
,
and
a brief
description
of
each
function.
4
1
5
is
used
to
add
a
decimal
point
to
the
number
you
are
entering.
4
0
5
is
used
to
add
a
minus
sign
to
the
number
you
are
entering.
4
8
5
is
used
to
step
up
the
current
value
of
the
active
function.
The
analyzer
denes
the
step
for
dierent
functions
.
No
units
terminator
is
required.
F
or
editing
a
test
sequence
,
this
key
can
be
used
to
scroll
through
the
displayed
sequence
.
4
9
5
is
used
to
step
down
the
current value
of the
active
function.
The
analyzer
denes
the
step
for
dierent
functions.
No units
terminator
is
required.
F
or
editing
a
test
sequence
, this
key
can
be
used
to
scroll
through
the
displayed
sequence
.
4
5
is
used
to
delete
the
last
entry
,
or
the last
digit
entered
from
the
numeric
keypad.
This key
can
also
be
used
in
two
ways
for
modifying
a
test
sequence:
deleting
a
single-key
command that
you may
have
pressed
by
mistake
,
(for
example
N
N
N
N
N
N
N
N
N
N
N
A/R
)
deleting
the
last
digit
in
a
series
of
entered
digits
,
as
long as
you
haven't
yet
pressed
a
terminator
,
(for
example
if
you
pressed
4
ST
ART
5
4
1
5
4
2
5
but
did
not
press
4
G/n
5
,
etc)
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
1MODE
MENU
goes
to
the
delta
marker
menu,
which is
used to
read the
dierence
in
values
between
the active
marker and
a reference
marker
.
NNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNN
1 MODE OFF
turns o the delta marker mode
, so that the values displayed
for the active marker are absolute values
.
NNNNNNNNNNNNNNNNNNNNN
NNNNNNNN
1REF =1
establishes marker 1 as a reference
. The active marker
stimulus
and response values are then shown relative to this delta
reference. Once marker 1 has been selected as the delta
reference, the softkey label
NNNNNNNNNNNNNNNNNNNNNNNN
NNNNN
1REF =1
is underlined in this
menu, and the marker menu is returned to the screen. In the
marker menu, the rst key is now labeled
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MARKER 1 REF = 1
.
The notation \1REF=1" appears at the top right corner of the
graticule.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1REF =2
makes marker 2 the delta reference.Active marker stimulus
and response values are then shown relative to this reference.
9-2 Key Denitions