Controls And Functions - Rotel Rt-845Ax Kurzanleitung

AM Antenna
The loop antenna is provided for optimum AM reception.
Attach the loop antenna onto the antenna holder On the
rear panel, and connect the lead wires to the antenna screw
terminals marked "G" and "AM". If an outdoor antenna
desired for better reception due to difficult reception area,
connect such antenna to the same screw terminals as the
loop antenna. Please note that the loop antenna should be
left connected to the terminals even when the external
antenna connected.

CONTROLS AND FUNCTIONS

1. POWER Button
s Depres ONto applyACpowerto the tuner,Pushagainto
release and switch power OFF. The LED indicator above it
will glow when power is ON.
CAUTION
As long as the power cord is plugged into a AC outlet,
poweris suppliedto the unit regardlessof the setting
of the Power Button.
2. MEMORY Indicator
The indicator lights when the MEMORY button is actived.
3. STEREO Indicator
The indicator lights when FM stereo broadcasting signal is
tuned in, in case the MONO/STEREO button set to STEREO
position.
4. AUTO TUNING Indicator
The indicator lights when AUTOIMANUAL button set to AUTO
position.
5. FREQUENCY Display
In the station frequency displaying ' 'FM" and MHz" appear
in FM reception, and "AM" and "KHz" in AM reception.
6. SIGNAL Indicator
the indicator will light when tune to AM or FM station properly.
7. AUTO/MANUAL Button
Depressing this button changes the tuning mode from manual
to automatic. When automatic tuning is selected the AUTO
AM/Ftv' TEREO TUNER RT- BASA x
OPERATION
• The RT-845AX(RT-845AXL)employes aquartz PLL syn-
thesizer 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 memorycircuit. you
AM Loop Antenna
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Swing out for
To outdoor
optimal reception AM Antenna
8. MONO/STEREO Button
Depressing this buttonchangesthe receivingmodebetween
monural and stereo.
MONO : For receptionof monauralor weak FM signal.
STEREO : For reception of FM stereo, When tuned in a
stereo signal, the tuner will automatically select
and demodulate FM stereophonic signals. The
STEREOindicate will light when tuned in a stereo
broadcasting.
In the MONO position, interstationnoise generatedwhen
Tuning in a FM station will be not muted.
9. MENORY Button
Depressthis button to enter a given stationfrequencyinto
the momory circuit.
Depress this button first, and then tap the desired station
button. The MEMO indicator will be lit while in activation.
10. AM/FM Selector
Depressingthis button changesthe AM signal receptionor
FM signal reception. RT-845AXL — givesAM receptionin
either MW or LW mode.
11. TUNING UP/DOWN buttons
These buttons are used to select the desired frequency
station, Depressthe UP buttonto tune frenquencyupwards
and DOWN button to tune frequency downwards.
12. SHIFT button
Whenselectingor storing11-20of AM or FMpresetstations,
depressthis buttonfirst and then depressanyof the desired
AM or FM preset station button.
13. STATION button
These buttons are used to tune in to the desired preset
stationsor to presetgivenstationfrequenceys in the memory
circuit.
O
13
can preset memory tuning. This is a feature only a synthesized
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 and or one FM sta-
tion in its memory. With the 10 station buttons, a total of 20
AM and FM station can be stored.
• The RT-845AXL memory stores a total of 20 FM stations,
GNO and 20 MWILW stations.
• The power source of 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 commercing operation, check to make sure all
antenna, amplifier and power connections are properly made.
I. Set the volume control on the amplifier to minimum posi-
tion, 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
tuner.
3. Depress FM/AM button of the tuner function selector.
(On RT-845AXL select to the FM/MW/LW button).
4, Tune in to the desired station by means of tuning or
station buttons.
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 and PRESET
• AUTO TUNING
Set to Auto Tuning position. Press Tuning button, UP or
DOWN, automatic scanning AM/FM band begins. Scanning
stops when it reaches a point whffe 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 to Manual Tuning position. A tap of the tuning button,
DOWN or UP, will shift the tuning frequency in specified
increments. If you keep the button depressed down, the
frequency will change continously.
stop frequency change.
• PRESET MEMORY TUNING
Tune in to the desired
tuning mode Depress the MEMORY button , then Tap
any station button, 1 through 10 or tap SHIFT button then
select I I through 20,toenterthe frequency into the memory
circuit. Thereafter, you may recall the same frequency any
time simply by depressing the same button.
12
NOTE: Once the MEMORY 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 precedures. The above procedures
should also be followed to chang 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 repluggingthe 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 posi-
tioning of antenna cable or improper antenna installation.
Use a 75-ohm
multipath to obtain optimal signal reception. Note that dur-
ing 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 I: In a location near a broadcasting station, very strong
signals may cause noise or distortion,depending
of antenna
the antenna
Note 2: Inside a concrete building. FM signals are weaken-
ed and satisfactory reception may be difficult. An outdoor FM
antenna will best remedy such a situation.
SPECIFICATIONS
FM TUNER
UsableSensitivity(mono)... 6.5 dBf/I .2ßV(75 ohms)
50 dB Quieting Sensitivity:
Mono
Stereo
Signal-to-Noise Ratio (at 65 dBf).
Mono
Stereo .
Harmonic Distortion (at 65 dBf):
MEMORY TUNING.
1 kHz.
Frequency
Capture Ratio
Alternate Channel Selectivity
(±400
Spurious Response Ratio. .95 dB
Image Response Ratio.
IF Response
AM Suprression
Stereo Separation.
Release the button to
Subcarrier
SCA Rejection Ratio.
station in either AUTO or MANUAL Antenna Input.
AM TUNER
Sensitivity
Selectivity
Signal-to-Noise
Image Response Ratio.
IF Response
Antenna .
MISCELLANEOUS
Power Requirement.
Power Consumption.
Dimensions
Weight (net).
• Specifications and design subject to possible modification
without notice.
cable for outdoor FM antenna and minimiie
on the type
used. In that case, install an attenuator between
and the tuner.
SECTION
1ldBf/2gV (75 ohms)
34.5dBf/30ßV (75 ohms)
. 75 dB
70 dB
0.08% (mono), 0.3% (stereo)
Response.
.30 to 15,000Hz, +1.5dB,
-1.5dB
1.5 dB
kHz). .63 dB
.65 dB
Ratio. , 90 dB
Ratio .60 dB
.100 Hz/l kHz/10 kHz,
35 dB/40 dB/30 dB
Product Ratio.
60 dB
70 dB
. 75 ohms unbalanced
SECTION
MW LW (RT-845AXL )
... 350gV/mm 7504V/rn
Wide/Narrow
.27dB/42dB 25dB/40dB
Ratio.
60dB 60dB
40dB
40dB
Ratio.
.40dB 40dB
Loop antenna
. 220V/50Hz
. 10 watts
(overall). 444(W) x 66(H) x 253(D) m/m
.3.2kg
4