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OPERATION
• The RT-870 (RT-870L) employs a quartz PLL syn-
thesier for easy and accurate tuning. Tuning frequency is
visible on the digital readout, and you can tune in to the
desired station accurately. With the unit's memory circuit,
you can preset memory tuning. This is a feature only a syn¬
thesized tuner can offer, letting you recall a stored station
frequency instantly with a single tap of a button.
• One station button can store one AM or one FM station
in its memory. The RT-870 permits a total of 16 stations to
be stored, be each station AM or an FM. For example, you
could store 12 FM and 4 AM station randomly.
• The power source of the unit's memory citcuit is the
capacitor back-up type. If power cord is unplugged, or if there
is a power failure, the electrical energy accumulated in the
capacitor while the unit was ON will retain the frequencies
stored in the memory circuit for three days. (The memory
is retained as long as the power cord is plugged into an AC
outlet, regardless of the position of the POWER button.) If
you leave the power cord unplugged for over three days,
the stored frequencies will be lost.
• Before commencing operation, check to make sure all
antenna, amplifier and power connections are properly
made.
1. Set the volume control on the amplifier to minimum
position, and amplifier function switch to TUNER position
(or to AUX position if the tuner is connected to AUX
terminal).
2. Turn on the amplifier and press the POWER button on
the tuner.
3. Depress FM or AM button of the tuner function selector
On RT-870L select among FM. MW. and LW buttons.
4. Tune in to the desired station by means of tuning or
station buttons. (See section on "Tuning".)
5. Raise the volume to the desired level, and enjoy
listening
Tuning
The unit is designed to permit three modes of tuning: auto
tuning, manual tuning, and preset memory tuning.
• Auto Tuning (for FM Reception Only)
Set FM Auto Tuning button to the depressed position. Press
Tuning button, UP or DOWN. Automatic scanning of FM
band begins. Scanning stops when it reaches a point where
the input signal exceeds a certain acceptable level. To tune
in to another station, press DOWN or UP button according
to the frequency of the desired station.
• Manual Tuning
Set FM Auto Tuning button to the released position. A tap
of the tuning button, DOWN or UP, will shift the tuning
frequency in specified increments. If you keep the button
pressed down, the frequency will change continuously.
Release the button to stop frequency change.
• Preset Memory Tuning
Tune in to the desired station in either auto or manual tuning
mode. Press the Memory Program button Then, press any
station button, 1 through 16,to enter the frequency into the
memory circuit. Thereafter, you may recall the same
frequency any time simply by pressing the same button.
Note: that once the Memory Program button is pressed, you
must press the appropriate station button within several
seconds to enter the station frequency. If more time elapses
before you press the station button, entry cannot be made.
In that case start again, following the above procedures. The
above procedures should also be followed to change the
station preset for a given station button
Note: If you have turned off the unit, and turn it on again,
the unit will tune in to the station frequency to which it was
tuned immediately before turn-off.
HUM AND NOISE
Hum often accompanies activation of power supply. If hum
is generated, try replugging the power cord into the wall
outlet, reversing the plug this time. Other possible causes
of hum include improper routing of connecting cords (try
changing cord position), or incorrect pin-plug insertion.
Check all connections if hum persists
If noise is introduced, it is usually caused by improper
positioning of antenna cable or improper antenna installation.
Use a 75-ohm cable for outdoor FM antenna and minimize
multipath to obtain optimal signal reception. Note that during
signal reception the unit may pick up noise from other
household electric appliances (as when switching power on
or off). In that case, check the relative location of the
appliances and keep them away from the unit, or vice versa,
as necessary.
Note 1: In a location near a broadcasting station, very strong
signals may cause noise or distortion, depending on the type
of antenna used. In that case, install an attenuator between
the antenna and the tuner.
Note 2: Inside a concrete building. FM signals are weakened
and satisfactory reception may be difficult. An outdoor FM
antenna will best remedy such a situation.
VOLTAGE SELECTION
Not availble for U.K., Canada and Scandinavia
The unit is a variable voltage equipment that can run on
120V, 220V or 240V power supply Your unit should already
be preset at the proper voltage for use in your area. However,
if you move to an area where the power supply voltage is
different, consult your dealer
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