Aiphone TX-1200 User manual
SAI
PHONE
TX-1200
AM/FM
STEREO
TUNER
MODEL:
TX-1200
—
INSTRUCTIONS
—
The
TX-1200
is
a
quartz
synthesized
stereo/monaural
AM/FM
tuner,
offering
stable,
drift-free
reception
for
your
background
music
system
in
conjunction
with
the
Aiphone
or
other
playing
systems.
One
touch
tuning
allows
instant
recall
of
up
to
20
preprogrammed
stations.
Automatic
muting
eliminates
extraneous
noise
while
tuning.
(
FEATURES
)
*
Digitally
Synthesized
Quartz
Locked
Tuning.
*
High
Sensitivity
&
Exceptionally
Stable
Reception.
*
20
programmable
stations
random.
*
Automatic
"Next
Station
Search"
mode
tuning.
*
Stereo/Monaural
output.
*
Convenient
digital
frequency
display
for
manual
tuning.
WARNING'
T
°
PREVENT
F,RE
0R
SH0CK
HAZARD,
DO
NOT
EXPOSE
THIS
APPLIANCE
TO
RAIN
OR
MOISTURE.
Q^yyjQ^J.
TO
PREVENT
ELECTRIC
SHOCK.
DO
NOT
REMOVE
CABINET.
NO
USER
SERVICEABLE
PARTS
INSIDE.
REFER
SERVICING
TO
QUALIFIED
SERVICE
PERSONNEL.
(
SPECIFICATIONS
~)
FM
SECTION
*
Frequency
Range
87.5-
108MHz
*
Sensitivity
11.2dBf
(2/A/,
IHF'58)
*
50
dB
quieting
sensitivity
Mono
20.2dBf
(5.6/A/,
IHF'58)
Stereo
40.2dBf
(56/A/,
IHF'58)
*
Total
Harmonic
Distortion
0.2%
(Mono),
0.3%
(Stereo)
*
Signal-to-Noise
Ratio
Mono
73dB
Stereo
71
dB
*
Frequency
Response
20Hz
—
15KHz
*
Alternate
Channel
Selectivity
65dB
*
Capture
Ratio
I.OdB
*
Image
Rejection
50dB
*
Spurious
Response
Rejection
(at
98
MHz)
70dB
*
AM
Supression
1
KHz
40dB
10
KHz
35dB
*
Carrier
Leak
19
KHz
—
35dB
38
KHz
—
50dB
*
Antenna
Terminals
300
ohms
(balanced)
75
ohms
(unbalanced)
AM
SECTION
*
Frequency
range
530-
1610KHz
*
Sensitivity
20/A/,
330/tV/m
*
Image
Rejection
(at
1000
KHz)
40dB
*
IF
Rejection
(at
1000
KHz)
60dB
GENERAL
*
Power
Requirements
AC
120V60Hz
*
Power
Consumption
14W
*
Dimensions
(WxHxD)
422
x
67
x
232mm
16-5/8”
x
2-5/8”
x
9-3/16''
*
Weight
7.04lbs
(3.2kg)
(
INSTALLATION
)
The
TX-1200
should
never
be
placed
directly
on
top
of
a
component
that
generates
heat,
such
as
a
power
amplifier.
Make
sure
it
is
not
located
near
a
heater,
radiator
or
a
window
that
might
be
left
open
in
the
rain.
Make
sure
the
audio
leads
are
pressed
or
attached
in
firmly
and
are
not
stretched
taut
so
they
could
pull
loose
later.
Never
make
or
break
these
connections
while
your
amplifier
or
preamplifier
is
switched
on.
The
audio
output
may
be
connected
to
the
music
input
of
any
one
of
the
Aiphone
paging
adaptors,
ie;
PD-1,PD-2,MC-A,PA-T,or
BX
Serie
amplifiers.
Turn
off
all
components
before
making
connection
For
antenna
settings
and
connections,
see
page
7.
Amplifier
OPERATIONS/INSTRUCTIONS
Front
Panel
—
Antenna
Connection
Terminals
FM
(300
ohms)
Antenna
Terminals
FM
(75
ohms)
Antenna
Terminals
GND
Terminal
AM
Antenna
Terminal
OUTPUT
Terminals
Connect
to
the
TUNER
or
AUX
terminals
of
the
Stereo
Amplifier
or
similar
amplifier.
AM
Bar
Antenna
FM
Antenna
75-ohm
Socket
This
socket
is
used
for
a
coaxial
75-ohm
antenna
cable
with
a
plug.
4
LOCATION
OF
CONTROLS
AND
THEIR
FUNCTIONS
)
1.
POWER
Switch
Press
ON
to
apply
AC
power
to
the
tuner.
Press
again
to
release
and
switch
power
OFF.
2.
Function
Indicators
These
light
to
indicate
the
selected
frequency
band
as
follows.
FM:
For
reception
of
FM
broadcasts.
AM:
For
reception
of
AM
broadcasts.
When
the
tuner
receives
an
FM
stereo
broadcast
with
the
MONO/ST
switch
set
to
ST
(STEREO)
posi¬
tion,
the
STEREO
indicator
will
be
displayed.
3.
SIGNAL
Strength
Indicator
Indicates
the
signal
strength
at
the
antenna.
The
indication
should
be
maximum
when
tuning
to
AM/FM
stations.
4.
Frequency
Display
Digitally
indicates
the
AM/FM
station's
frequency.
AM
frequencies
are
indicated
in
KHz
and
FM
in
MHz.
5.
PRESET
STATION
Indicator
These
light
to
indicate
preset
station
number
selected
from
the
AM/FM
RANDOM
20
STATION
MEMROY.
6.
AUTO
TUNING
Indicator
The
indicator
lights
when
the
AUTO
TUNING
switch
is
pressed.
7.
MEMORY
Indicator
The
indicator
lights
when
the
MEMORY
switch
is
pressed.
Store
the
frequencies
of
broadcast
stations
in
the
memory
when
this
indicator
is
on.
8.
MEMORY
Switch
Press
this
switch
to
store
the
frequency
of
a
broadcast
station
in
memory.
(See
page
9
for
use.)
9.
TUNING
UP/DOWN
Buttons
These
buttons
are
used
to
select
the
desired
frequency
in
the
band
selected.
Press
the
UP
button
to
tune
upscale
and
the
DOWN
button
to
tune
downscale.
10.
1
-
1
0
/11-20
Shift
Button
When
selection
or
storing
11-20
of
the
AM/FM
RANDOM
20
STATION
MEMORY,
press
this
button
while
pressing
any
of
the
AM/FM
RANDOM
20
STATION
MEMORY
buttons.
When
1-10/11-20
and
1/11
are
pressed
at
the
same
time,
11
will
be
selected.
(Otherwise
1
will
be
selected.)
11.
A
M
/
F
M
RANDOM
20
STATION
MEMORY
Press
these
buttons
to
preset
or
call
up
stations.
12.
FM/AM
Function
Selector
Buttons
Selects
the
frequency
band
as
follows.
FM
:
For
reception
of
FM
broadcasts.
AM:
For
reception
of
AM
broadcasts.
13.
MONO/ST
Button
Pressing
this
button
alternates
the
receiving
mode
between
monaural
and
stereo.
MONO:
For
reception
of
monaural
or
weak
FM
stations.
ST:
For
reception
of
FM
stereo.
When
tuned
to
a
stereo
signal,
the
tuner
will
automatically
select
and
demodulate
FM
stereophonic
broadcasts.
The
STEREO
indicator
will
light
when
tuned
to
a
stereo
broadcast.
14.
AUTO
TUNING
Button
Pressing
this
button
alternates
the
tuning
mode
between
automatic
and
manual.
When
the
automatic
tuning
mode
is
selected,
the
AUTO
TUNING
indicator
will
light.
When
the
AUTO
TUNING
indicator
is
lit
(Automatic
Tuning):
By
pressing
the
TUNING
UP
or
DOWN
button,
the
tuning
frequency
scans
the
frequency
band
up
or
down
continuously:
scanning
will
stop
when
tuned
precisely
to
a
broadcast.
When
this
button
is
in
the
in.
When
the
AUTO
TUNING
indicator
is
not
lit
(Manual
Tuning):
When
the
UP
or
DOWN
button
is
pressed
once,
the
tuning
frequency
changes
to
a
higher
or
lower
fre¬
quency
by
one
step:
100
KFIz
for
FM.
10
KHz
for
AM.
REAR
PANEL
15.
OUTPUT
Jacks
These
output
the
signal
received
by
the
TX-1200.
Connect
to
the
TUNER
or
AUX
terminals
of
the
Stereo
Amplifier
or
similar
amplifier.
16.
AC
Power
Cord
Connect
to
an
AC
socket.
6
(
ANTENNA
FOR
OPTIMUM
RECEPTION
)
FM
Antenna
If
the
TX-1200
is
to
be
used
in
a
strong
signal
area,
a
"T"-type
antenna
(dipole)
may
provide
adequate
rtnvp
tion.
To
connect
this
antenna,
attach
its
leads
to
the
300-ohm
terminals,
fully
extend
the
upper
section,
of
the
"T"
and
position
them
for
greatest
sensitivity
(maximum
indication
of
the
SIGNAL
indicators
wlum
tuned
to
a
broadcast
station).
In
weak
signal
areas,
a
roof-top
FM
antenna
will
be
required.
A
3-element
antenna
is
generally
sufficient
for
medium
distances
and
an
antenna
with
5
or
more
elements
may
be
required
for
long
distances
and
hin
U
o
areas.
Two
types
of
outdoor
antenna
are
available:
300-ohm
balanced
antennas
and
75-ohm
unbalanced
antenna-;
300-ohm
antennas
uses
the
same
flat
twin
lead
used
by
most
TV
antennas.
75-ohm
antennas
uses
a
coaxial
cable;
these
antennas
are
recommended
for
use
in
high
interference
areas
such
as
adjacent
to
a
road
whoi,,
ignition
noise
may
be
present.
When
installing
a
roof-top
antenna,
check
that
it
is
pointing
in
the
directum
from
which
most
stations
are
received.
Do
not
connect
antenna
leads
to
both
the
75-ohm
and
300-ohm
i
M
puts
at
the
same
time.
Use
only
the
terminals
corresponding
to
the
antenna
and
cable
being
used.
AM
Antenna
1.
AM
Bar
Antenna
In
an
area
where
signals
are
strong,
near
to
the
broadcast
stations,
the
AM
bar
antenna
provided
on
tin.
rear
panel
may
be
adequate.
This
antenna
is
effective
in
all
areas
except
where
the
signal
strength
u
(
very
low,
or
in
buildings
made
from
reinforced
concrete.
Position
this
antenna
so
that
as
many
SIGNai
indicators
as
possible
light
when
tuned
to
an
AM
broadcast.
2.
Outdoor
Antenna
If
you
have
difficulty
in
receiving
clear
AM
broadcasts
using
the
bar
antenna,
connect
an
external
ant<m
na
to
the
AM
terminals.
Set
this
antenna
near
a
window
or
outdoors,
as
high
as
possible;
do
not
discim
nect
the
provided
AM
bar
antenna.
*
How
to
connect
the
coaxial
cable
to
the
FM
75ft
terminal.
7
(
RECEIVING
BROADCASTS
)
©
®
©
FM
Broadcasts
1.
Turn
on
the
power
of
both
the
TX-1200
and
the
amplifier
or
similar
stereo
amplifier.
2.
Press
the
AUTO
TUNING
button
so
that
the
AUTO
TUNING
indicator
goes
off.
3.
Press
the
FM
function
selector
for
the
reception
of
FM
broadcasts.
4.
Pressing
either
the
TUNING
UP
or
DOWN
button
while
watching
the
frequency
display
and
the
SIGNAL
indicator
will
enable
correct
tuning
to
the
required
station.
After
tuning
to
the
station
precisely,
adjust
the
volume
and
other
controls
of
the
amplifier
for
the
desired
sound
(refer
to
your
amplifier's
manual).
If
the
signal
is
very
weak,
set
the
MONO/ST
switch
to
the
MONO
position.
AM
Broadcasts
1.
Turn
on
the
power
of
both
the
TX-1200
and
the
amplifer
or
similar
stereo
amplifier.
2.
Press
the
AUTO
TUNING
button
so
that
the
AUTO
TUNING
indicator
goes
off.
3.
Press
the
AM
function
selector
for
the
reception
of
AM
broadcasts.
4.
Pressing
either
the
TUNING
UP
or
DOWN
button
while
watching
the
frequency
display
and
the
SIGNAL
indicator
will
enable
correct
tuning
to
the
desired
station.
After
tuning
to
the
station
precisely,
adjust
the
volume
and
other
controls
of
the
amplifier
for
the
desired
sound
(refer
to
your
amplifier's
manual).
(
PRESET
BROADCAST
RECEPTION~)
How
to
Preset
Broadcasts
1.
Turn
on
the
power
of
both
the
TX-1200
and
your
amplifier.
2.
When
tuning
to
FM
broadcasts,
set
the
MONO/ST
switch
as
required.
3.
Press
the
desired
AM
or
FM
function
selector.
4.
Tune
to
the
desired
AM
or
FM
station
by
pressing
the
TUNING
(UP
or
DOWN)
button
while
monitoring
the
frequency
display
and
the
SIGNAL
indicators,
so
that
the
frequency
of
the
desired
station
is
displayed
and
the
maximum
number
of
SIGNAL
indicators
light.
5.
Press
the
MEMORY
button.
The
red
LED
above
the
MEMORY
will
light
to
indicate
that
you
should
enter
the
required
preset
number.
Choose
either
1-10
or
11-20
using
the
1-10/11-20
(shift)
button.
6.
While
the
MEMORY
indicator
is
displayed,
press
any
of
the
AM/FM
RANDOM
20
STATION
MEMORY
buttons
as
desired.
The
PRESET
STATION
displays
the
number
corresponding
to
the
button
pressed,
and
the
MEMORY
indicator
will
go
off.
7.
Now
tune
to
the
next
station.
Press
the
AM/FM
RANDOM
20
STATION
MEMORY
selector
button.
Set
all
the
stations
you
wish
to
preset
in
the
same
way.
The
AM/FM
RANDOM
20
STATION
MEMORY
selectors
can
be
used
to
preset
a
total
of
20
stations.
When
presetting
to
only
FM
stations,
20
stations
can
be
preset;
a
maximum
of
10
AM
stations
can
be
preset.
Once
preset,
these
stations
can
be
recalled
at
a
later
time.
You
can
overwrite
a
previously
preset
station
with
a
new
entry
by
following
the
above
procedure.
When
this
is
done,
the
memory
setting
of
the
previously
preset
station
will
be
cleared
and
replaced
by
the
new
entry.
How
to
Recall
a
Preset
Station
1.
Turn
on
the
power
of
both
the
TX-1200
and
your
amplifier.
2.
Select
either
1-10
or
11-20
with
the
1-10/11-20
(shift)
button.
3.
Press
the
AM/FM
RANDOM
20
STATION
MEMORY
selector
button
corresponding
to
the
preset
station
you
wish
to
recall.
4.
If
an
FM
station
has
been
chosen,
set
the
MONO/ST
switch
as
required.
9
(
MEMORY
BACK-UP
FUNCTION
)
The
contents
of
the
preset
station
memories
and
the
channel
which
was
received
at
the
last
are
maintained
as
long
as
power
is
supplied
to
the
tuner
if
the
power
plug
of
the
tuner
is
disconnected,
they
will
be
cleared
about
six
hours
after
disconnection.
—
A
NOTE
FOR
BEST
RECEPTION
—
FM
broadcast
are
prone
to
several
forms
of
interference;
the
most
disturbing
is
multi-path
interference,
which
is
analogous
to
"ghosting"
on
your
TV
set.
You
may
find
that
you
have
to
experiment
quite
a
bit
with
anten¬
na
placement
for
some
stations.
Particularly
weak
or
distant
stations
can
be
received
with
the
MONO
switch
depressed;
this
also
defeats
the
interstation
FM
muting
which
might
otherwise
interpret
the
weak
signal
as
simply
noise.
THIS
DESIGN
HAS
BEEN
CERTIFIED
TO
COMPLY
WITH
PART
1
5,
SUB
PART
C
OF
THE
FCC
RULES
AND
REGULATIONS.
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