Onkyo T-9090 - Page 7

Multipath Adjustments
This
unit
is
equipped
with
rear
panel
terminals
to
allow
checking
for
multipath
reception
problems.
To
use
these
terminals,
connect
an
oscilloscope
as
shown
below
and
then
adjust
the
direction
and/or
location
of
the
antenna
until
the
multipath
problem
is
minimized.
If
you
require
more
detailed
information,
contact
your
Onkyo
dealer.
OSCILLOSCOPE
MULTIPATH
VERTIO
O|]HOR
@
e
Oo
fe)
—
NUAND,
Multipath
present
No
multipath
Trouble-shooting
Guide
The APR (Automatic Precision Reception) System
This
unit
is
equipped
with
Onkyo’s
unique
computer-controlled
APR
system
that
automatically
sets
the
RF
stage
gain
(Local/DX),
IF
bandwidth
(wide/narrow/super
narrow),
stereo/mono
reception
modes
and hi-blend
function
to the proper
settings
for the quality
(field
strength,
intermodulation
distortion,
noise,
distortion,
etc.)
of the broadcast
currently
being
received.
Consequently,
optimum
reception
is assured
at all times.
When
desired,
the APR
settings
can
be
manually
overridden
by
using
the
corresponding
front
panel
switch.
To
further
reduce
distortion,
this
unit
also
has
another
Onkyo-developed
technology,
the FM feedback
circuit.
APR
is
linked
with
FM
feedback
so
that
FM
feedback
is
automatically
activated
when
the
IF
bandwidth
is
WIDE.
In
this
case,
the
‘FM
FB’ indicator
in the APR
indicator
section
20) will light.
If
you
are
using
an
antenna
with
a
rotator,
tune
in
the
broadcast
again
each
time
the
direction
of
the
antenna
is
changed
to
obtain
the
correct
APR
settings
for
the
new
antenna
alignment.
To
maintain
stable
reception
quality,
APR
is
designed
so
that
the
original
settings
are
maintained
for
a
particular
station
even
if
signal
quality
changes
in some
manner
afterward.
The
tuning
steps
by
which
the
tuned
frequency
increases
have
been
set
at
the
factory
to
the
proper
value
for
the
area
where
each
unit
is
to
be
sold.
If
you
use
the
unit
in
a
country
where
a
different
tuning
step
is
required
or
if
the
broadcast
frequencies
in
your
country
change
so
that
you
Can
not
tune
in
radio
stations
precisely,
take
this
unit
to
your
Onkyo
dealer.
Problem
Cause
Remedy
Crackling
noise
on
FM.
lamp
on
and
off.
e@
Noise
caused
by
turning
fluorescent
|
@
Noise
from
automobile
ignition.
©
Move
the
antenna
as
far
as
possible
from
the
fluorescent
lamp.
@
Install
an
outdoor
FM
antenna
as
far
as
possible
from
the
road.
|
@
Change
the
position
or
direction
of
the
FM
outdoor
antenna.
Signal
strength
is
sufficient
@
Station
is
too
strong.
but
the
sound
is
distorted
and the separation is bad.
mountains.
@
Multiple
reflection
of
the
radio
waves
because
of
tall
buildings
or
@ Change to T-shaped antenna.
@
Use
an
antenna
which
has
better
directivity
and
select
a
point where the distortion is least.
Signal strength indication @ The station is too weak.
varies unsteadily. Hiss on FM.
broadcast.
e@
Stereo
FM
broadcasts
cover
only
about
half
the
distance
of
an
ordinary
@ Install outdoor FM antenna.
@ Change the position or direction of the outdoor antenna.
e@
Switch
to
mono
reception.
(Even
stereo
broadcasts
will
be heard in mono.)
No station is recalled when 2
preset key is depressed.
@
The
power
switch
has
not
been
turned
on
for
a
long
time
or
the
power
cord
|
has
been
unplugged
for
a
long
time.
@ The memory contents are lost if the power is not turned
| on and off a few times each month. Store all stations in
| the memory again and remember to turn power on and
|
off
a
few
times
each
month.