Page 5
Supplement to Model 2020 Fm Pro Manual
In
pu
t
VU
Le
ve
l
i
nd
ica
to
rs
sh
ow
audio
input
relative
to
the
currently
set
input
reference.
The
input
re
fe
re
nc
e
le
ve
l
is
us
ua
lly
se
t
to
cause
a
program
reference
tone
to
read
zero
VU.
W
ith
a
digital
input,
zero
VU
corresponds
to
10dB
below
digital
peak
maximum
(i.e.,
digital
-10dB).
Multiband
Compressor
indicators
show
gain
reduction
for
all
four
bands.
The
left
and
right
channel
gain
reductions
are
“shadowed”
into
one
set
of
meters
to
streamline
the
panel
design.
The
range
of
gain
reduction
is
1.5
to
15dB
in
steps
of
1.5dB.
Spin
Dial
is
used
with
the
menuing
system
to
control
parameters
with-
in
the
MkIII.
Liquid
Crystal
Display
contains
all
op
er
at
in
g
m
en
us
an
d
m
es
sa
ge
s.
Menus
are
navigated
by
use
of
the
cursor
, enter
, and
escape
keys.
A
fall-asleep
timer
dims
the
display
when
no
activity
is
sensed
for
a user
settable
time
period.
The
display
brightens
whenever
any
button
is
depressed
or
spin
dial
is
moved.
Le
ve
lin
g M
et
er
in
di
ca
te
s t
he
am
ou
nt
of
automatic
gain
correction
pres-
ently
taking
place.
The
scale
goes
from
+
15d
B
to
-7d
B
in
2.
5d
B
steps.
The
indication
will
be
zero
dB
for
a
true
reference
level
input
tone.
Input
Processing
indicators
show
the
current
on-air
status
of
all
vital
process
functions
which
are
on/off
in
nature.
Multiband
Coupling
indicators
show
the
status
of
the
left-to-right
and
band-to-band
coupling
coefficients
within
the
multiband
compressor
subsystem.
Limiter
Indicator
shows
peak
audio
limiting
prior
to
pre-emphasis.
The
scale
is
1
to
10dB
in
1dB
steps.
Pre-emphasis
processing
(when
installed)
is
not
displayed.
Headphone
Jack
allows
monitoring
of
the
input
signal
(analog
and
digi-
tal)
as
well
as
the
processed
output
signal.
The
volume
for
each
selec-
tion
is
separately
adjustable
through
the
menu
to
allow
good
a/b
com-
paring
of
the
processed
sound.
A
proper
de-emphasis
filter
is
auto
-
matically
inserted
in
the
output
monitor
when
pre-emphasis
pro
-
cessing
is
installed.
Output
Status
indicators
show
if the
analog
and
digital
outputs
are
cur
-
rently
turned
on
or
off
and
whether
the
FM
Pro
has
been
bypassed.
When
bypassed,
the
analog
and
digital
input
jacks
are
coupled
direct-
ly
to
their
respective
output
jacks
through
metallic
relay
contacts
to
assure
signal
throughput
for
testing
or
emergency
operation.
Bypass
is
defaulted
when
the
power
is
shut
off
.
N
av
iga
tio
n
Bu
tto
ns
operate
the
menus
and
allow
entry
and
escape
from
every
function.
Buttons
are
continuously
lighted
for
better
visi-
bility
.
MkIII Front Panel
LCD
Contrast
control.
