Rotel RT-824 User's Manual
Contents
1. ROTEL ay AMOEM STEREO TUMER 3 AT 824 AM FM Stereo Tuner bb MP set Eai BO ee be SF eo 4 2 eb RB a ra d i H i t 4 FOO i B00 4000 t KAXI monro CHIT T LEVEL FINES TAC FOE ALTE aM SFERE ONLY EME RACHEL BGs INTRODUCTION We would like to take this opportunity to congratulate you for purchasing our Stereo Tuner With the high quality design and workmanship that goes into making this equipment you can be assured of its flaw less performance for many years to come We have fitted every control and feature you could conceivably need Designed for both versatility and ease of operation this piece of equipment will add professional studio flexibility to your Hi Fi sound center The performance is exceptional it will WARNING TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE wer 0 Bah GE RERET E E 2p ROTE A Wir allow you to experience true high fidelity as never before Its full and natural stereo phonic reproduction offers you musical entertainment approaching that of live per formances We sincerely hope you will treasure this professional equipment in order to obtain the maximum use out of your unit please read the following pages of this Owner s Manual carefully Do not attempt to operate the unit until you have made all the necessary connections FM 4 CHANNEL DETECTOR OUTPUT Use to accep2. level OPERATION Having made all connections according to the preceding instructions and become familiar with the functions of the unit you are ready to operate the equipment Apply power by plugging into the power source and pushing in the POWER button Pull up the Voltage Selector plug which has a white arrow on its top Reinsert the plug to the Selector Base so that the head of the arrow lines up with the pointer line of the voltage you desire CONNECTING TO POWER SUPPLY For power the unit requires the normal house electrical current AC Simply plug the unit to a wall outlet If in any doubt about connecting to the power source consult a qualified electrician CAUTION Do not apply power to the equipment without first making sure that speakers are connected properly and that the unit s VOLUME control is set to mini mum If you live in U K and your unit comes with 3 core cord without a plug be sure to read the following note HEADPHONES RECEPTACLE simply plug in your headphone lead for private listening You may turn off speakers by using controls on your amplifier if wish to listen to headphone only MULTIPATH SWITCH allows you to reduce FM interference noise caused by multipath characteristic Flip the switch ON and relocate you FM antenna usually T shape dipole antenna until the pointer of multipath meter built in with FM tuning meter deflects least and approaches the center Be sur
3. Do not connect other appliance s to convenience AC outlet if its their total power consumption exceeds maximum rated watts labeled next to the outlet MUTING Whenever you tune for an FM station you will hear rather loud interstation noise this is normal for all highly sensitive FM tuners and is not peculiar to this tuner To reduce this bothersome interstation noise your tuner is equipped with a unique MUTING LEVEL CONTROL Muting can be effected by turning the control to either 10uV or 304V position to suit your need If you wish to tune ina relatively weak signal set the control at 10 uV so that muting will not suppress all the weak signals For tuning in strong stations the control may be set at 304V The MUTING LEVEL CONTROL should normally be turned OFF when you have tuned in the desired station but it may be left at either on position without causing perceptable effect upon program reproduc tion However if you have tuned in a very weak station the control should definitely be turned OFF to assure strongest possible signal reception EXCLUSIVE NOTE FOR U K If your unit comes with a 3 core cable without a plug make certain live neutral and where appropriate earth leads are connected to the proper terminals Check that the terminals are screwed down firmly and no loose strands of wire are present WARNING THIS APPARATUS MUST BE EARTHED IMPORTANT The wires in this mains lead are coloured in accordance with
4. shelf on which the receiver is mounted In difficult reception areas the use of an outdoor antenna may prove necessary Follow its instructions for proper connection When using a 75 ohm unbalanced coaxial cable for antenna you may connect be tween 75 ohm and G terminal posts with the outer conductor or shield of the cable connected to the G terminal or use an adapter holder and plug into the 752 adapter socket Follow instruction on coaxial cable on further details GROUND Although it is not necessary to do so but if you wish to ground the tuner connect a wire from the terminal designated GND on the rear chassis to the ground terminal on your amplifier or to a nail driven into the earth VARIABLE Qutput Level Control AND NON VARIABLE OUTPUTS There are two pairs of output jacks designat ed LEFT and RIGHT on the rear chassis The left hand pair is a standard non variable output for use with most standard amplifiers These pair of output should be connected to the corresponding left and right input TUNER or AUX jacks on your amplifier For your convenience the connecting cables for this purpose are sup plied with this unit The right hand pair is a variable output of which output level can be varied from Q to 0 3V 30 400Hz for AM and from 0 to 1 5V 100 400Hz for FM with the out AC FUSE 752 COAXIAL ANTENNA ADAPTER SOCKET tareroewes BIRR JEMA Sow AC POWER CORD put level control on the fro
5. the follow ing code GREEN YELLOW EARTH BLUE NEUTRAL BROWN LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the ter minals in your plug proceed as follows The wire which is coloured GREEN YELLOW must be connected to the ter minal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN or GREEN YELLOW The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLUE or BLACK The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured BROWN or RED The apparatus must be protected by a 3 Amp fuse if a 13 Amp BS 1363 plug is used If another type of plug is used a 5 Amp fuse or lower must be used either in the plug or adapter or at the distribution board r FM SECTION FM Sensitivity IHF 2 0 1 64 V Dial Calibration Tolerance 200 KHz 50 dB Quieting 3uV Signal to Noise Ratio gt 10dB AM SECTION Harmonic Distortion Mono lt 0 2 AM Sensitivity IHF 150uV m Stereo lt 0 4 Image Rejection gt 80dB Selectivity Alternate Channel 80dB IF Rejection gt 80dB Capture Ratio 1 0 dB Signal to Noise Ratio 55dB Stereo Separation At 1 kHz 40 dB SCICCUWILY a Gd haem a aoe 40dB Supurious Response Rejection gt 110
6. dB IF Rejection 0 gt 110 dB GENERAL Image Rejection gt 110 dB Antenna aerials FM 3002 bal 752 unbal AM Suppression 55 dB AM ee ferrite loopstick SCA Suppression gt 80 dB Dimensions overall WxHxD mm 430 x 140 x 330 Muting Threshold 104V 30uV fixed Weight Net 2 4 s a ete ge 9 Kg 20 Ibs Output Level fixed 775 mV variable 0 1 5V Note features and specifications subject to changes for improvement without notice Roland Electronics Co Ltd 1 36 8 Ohokayama Meguro ku Tokyo Japan PRINTED IN JAPAN 50702
7. e to leave the switch OFF when not in use FUNCTION INDICATOR LIGHT visually indicates the selected program FM or AM STEREO INDICATOR LIGHT auto matically lights up on the dial glass to visual ly indicate whenever an FM stereo broad Cast Is tuned PRELIMINARY CHECK If the dial scale has failed illuminate remove and check the AC fuse If the fuse is blown check possible reasons for the blow out e g defective AC power cord etc and replace with same rating fuse SIGNAL STRENGTH TUNING METER shows the level of the incoming signal When used in the AM position tune for maximum deflection to the right for best possible reception When used in the FM position also tune for maximum indication but operate in conjunction with the FM tuning meter FM TUNING METER designed to Operate on a null or zero center principal Tune for the dead center position for best possible reception and minimum distortion It is also used as the multipath meter in conjunction with the multipath switch OUTPUT LEVEL CONTROL see VARIABLE AND NON VARIABLE OUT PUTS section for operation RECEIVING FM AND AM BROADCASTS 1 FM STEREO Under normal use for all FM broadcasts the function selector control should be placed in the FM STEREO position This tuner is equipped with a stereo sensing circuit which will automatically determine whether your unit is receiving monophonic or stereo phonic broadcasts and then au
8. nt panel This output is for use with amplifiers whose input level requirements are different from the standard amplifiers The control as its left most position is 0 output Turning it to the right will increase the output level proportionately and at its right most posi tion the output level will be at maximum To achieve appropriate output level for your amplifiers input requirement set control to the position where the st from the speakers is equally loud as when a record player is played through your amplifier with the volume setting set at the same level AC POWER INPUT CORD Your tuner has been specially designed so that it may be connected to a variety of power sources You may connect the AC Power Input Cord directly to a wall plug in which case the power will be supplied to the tuner independent of your amplifier Or you may connect it to your amplifier s switched or unswitched AC outlet If it is connected to a switched outlet by leaving the power button of the tuner on you will be able to maintain switching control for the tuner with your amplifier If it is connected to an unswitched outlet like connecting to a wall outlet you must use the tuner s own power button for switching control VOLTAGE SELECTION not available for U K and Scandynavia The tuner is a variable voltage equipment that can run on 100V 117V 220V or 240V power supply Your unit comes already preset at the proper voltage for use in yo
9. t an adapter to enable receive 4 channel broad Casting whenever effected in the future com AM FERRITE BAR ANTENNA STEREO INTEGRATED AMPLIFIER GROUND OUTDOOR AM ANTENNA REAR PANEL CONNECTIONS OUTDOOR FM ANTENNA 3002 CERN BE 1 eee SCREWS WO USER SORE REFER SERVICING TO Q AC OUTLET UNSWITCHED MAX 150W seo errrreree INDOOR FM ANTENNA 3002 STEREO INTEGRATED AMPLIFIER INSTALLATION IMPORTANT Do not apply power to this unit without first making sure that all the necessary connections are properly made AM ANTENNA CONNECTION No external antenna will generally be re quired for AM since a ferrite loopstick antenna is supplied at the rear of the unit For best possible reception extend the loopstick fully away from the tuner chassis If you live in a difficult reception area the use of an external or outdoor antenna may be desirable Connect a single wire antenna lead to the terminal marked AM on the rear chassis The wire antenna should be as long as possible and oriented for best re ception It must be kept away from large metal objects power lines or electrical machinery to insure reception without ex traneous noise FM ANTENNA CONNECTION Owing to the high sensitivity of the FM tuner section of the unit the antenna wire supplied is sufficient for most locations Connect this to both FM antenna terminals marked 300 ohms and mount horizontally for instance by tacking to the
10. tomatically adjust the mode of operation If the station is transmitting stereo your tuner will auto matically switch on the multiplex section and you will hear the broadcast in full stereo Should the station conclude broad Casting in stereo your tuner will auto matically switch back to monophonic reception 2 STEREO ONLY Should you wish to pick up only stereo stations set the function selector control to the STEREO ONLY position A special circuit is automatically set for you to tune In only stereophonic broadcasts discarding monophonic 3 FM MONO Should you wish to receive monophonic signal or weak stereo signal whose quality has been degraded by noise and poor signal conditions and so may be necessary to be heard in mono turn the function selector control to FM MONO Tune for the desired station with the tuning knob using the tuning meters to assure the strongest possible reception 4 AM Should you wish to listen to AM broad casts turn the function selector control to AM Though AM gives only monophonic signal the tuner will convert the signal to SPECIFICATIONS two channels enabling you to listen from two speakers as in stereo CAUTION ON Furnished Convenience AC Outlet a Do not insert or remove plug from any convenience AC outlet supplied on the appliance while the appliance is con nected to power Also do not insert foreign object other than a proper plug into the convenience AC outlet b
11. ur area however if you move to an area where the power supply voltage is different the voltage setting can be manually changed BE SURE THAT YOUR UNIT IS NOT CONNECTED TO THE POWER SOURCE BEFORE ATTEMPTING TO MAKE THIS CHANGE To change the voltage setting remove the name plate on the rear panel and locate the VOLTAGE SELECTOR see figure below FRONT PANEL CONTROLS ew TUNING KNOB heavy flywheel action allows easy and precise tuning on both AM and FM stations MUTING SWITCH activates a circuit which reduces audible interstation noise when tuning from station to station in FM at two muting threshold level steps 10uV or 304V Since very weak signals may be muted at the same time leave the control at OFF position when you wish to pick up very weak stations SOURCE SELECTOR CONTROL enables you to select the program you desire from AM FM STEREO STEREO ONLY FM and FM MONO HI BLEND SWITCH allows you to reduce annoying noise mixed in with signal This switch however should not be always at OFF position unless it is necessary POWER SWITCH supplies power to the tuner and to any component connected to the switched AC outlet on the rear chassis When the switch is ON dial scale and meters will be illuminated HEADPHONES VOLUME LEVEL CON TROL allows you to regulate the sound level fed into your headphone connected to this unit s HEADPHONE RECEPTABLE Rotate clockwise for increase in volume
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