2
The
A
uto
K
ey
4
Auto
5
enables
or
disables
automatic
ranging
for
the
result.
A
utomatic
ranging
ensures
that
the
result
has
a
displayed
value
between
9%
and
100%
of
full
scale
.
While
you
have
automatic
ranging
enabled,
the
operation-indicator
shows
AUTO
in
the
middle
of
the
display
.
The
default
state
is
for
automatic
ranging
to
be
enabled.
The
Up
K
ey
This
key
selects
the
next
higher
range
.
If
automatic
ranging
was
in
operation,
this
key
disables
it.
Example
If
the
instrument
is
currently
in
the
range
2.000
to
19.999W
,
pressing
4
Up
5
takes
it
to
the
20.00
to
199.99W
range
.
The
Down
K
ey
This
key
selects
the
next
lower
range
.
If
automatic
ranging
was
in
operation,
this
key
disables
it.
Example
If
the
instrument
is
currently
in
the
-20dBm
range
,
pressing
4
Do
wn
5
takes
it
to
the
-30dBm
range
.
The
Analog
Output
The
analog
output
is
the
BNC
connector
on
the
front
of
the
sensor
module
.
It
outputs
a
voltage
directly
proportional
to
the
strength
of
the
optical
signal
at
the
optical
input,
in
the
current
range
.
The
analog
signal
is
always
in
the
range
0
to
2V
,
2V
corresponding
to
a
full
power
input
signal
in
the
current
range,
0V
corresponding
to
no
input
signal.
If
the
range
changes
,
for
example
,
during
autoranging,
the
level
to
which
2V
corresponds
changes
.
Therefore
it
is
recommended,
if
you
want
to
use
the
analog
output,
disable
autoranging
and
select
the
best
range
for
the
application
with
4
Up
5
or
4
Do
wn
5 .
P
ossible
applications
for
the
analog
output,
would
be
to
close
the
feedback
loop
controlling
the
current
supplied
to
a
laser;
or
to
monitor
optical
power
on
an
oscilloscope
(the
analog
signal
reacts
instantaneously
to
the
input
signal,
whereas
the
power
shown
on
the
display
is
subject
to
averaging).
Local
Control
-
Measure
Mode
2-13
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
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