f`m4 tijner - Flashback Sales

F'M4 TIJNER
I N S T R U C T I OBNO O K
Q U AD
OURDFMA.
Tuner
BOOK
INSTRUCTION
CONTENTS
Accessories
service.
..::.:.
Guarantee
lntroduction
B r i e If n s t r u c t i o .n s
lnstallation
Connections.....
Operation
D e e m p h a s i.s. . .
Specification. ....
U . KT. r a n s m i t t e r s . .
LTD.,
ouAD ELECTROACOUSTICS
HUNTINGDON,
Cambs.,
P E 1 87 D B .
TelephoneNo.:Huntingdon(0480)52561
Telex
32348 QUADG
Quad is a registeredtrade mark
orF4SEC rSS 6
::1: ii
mber
;
. . . . . .. . . 2
........3
........3
.........4
.........4
..........7
........9
........9
.......12
Accessories
d ith
T h eF M 4i s s u P P l i ew
1 x A.C.Lead
1 x S i g n a lL e a d
1 x AerialConnector
QSPESSA
QP2P2SA
PPL734A
Service
lf servicingis requiredthe tunershouldbe returnedto the supplier'
Ltd.
the distributorlor the countryof purchaseor to Quad Electroacoustics
A briefnoteshouldbe enclosedgivingyour nameand addressand the
reasonfor returningit.
QUADofferssame-dayservicefrom Mondayto Fridayexcepttor bank
holidays.The map belowshowswhereto find us. Pleasecall 0480 52561to
m a k ea n a p p o i n t m e n t .
IMPORTANT
P O L Y S T Y R E NPEA C K
C A R T O NA N D E X P A N D E D
T H EC A R D B O A R D
H
A ST O B E R E T U R N ETDO
T
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E
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T
C
A
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E
I
N
S H O U L DB E R E T A I N E D
O RS E R V I C E .
ORR D I S T R I B U T OFR
T H EM A N U F A C T U R E
Guarantee
Thistuneris guaranteedagainstany defectin materialand
for a periodof twelvemonthsfrom the date of purchase'
workmanship
within this oeriodwe undertaketo supplyreplacementpartsfree oi charge
orovidedthatfailurewas not occasionedby misuse,accidentor negligence.
Freightand labourcostsare not coveredunlessby localagreement'
e f f e r e dw i t ht h i se q u i p m e ndt o e s n o t l i m i tt h e
W i t n i nt n e U . K t. h e g u a r a n t e o
A separateguaranteecard is not
rights.
consumedsexistingstatutory
e e g i n so n t h e d a y o n w h i c h
s u p p l i e dw i t hy o u rQ u a du n i t .Y o u rg u a r a n t e b
you take deliverY.
circuit diagramsand servicedatafor this Quad productare availablefrom
or distributor{or a smallcharge.
the manufacturer
INTRODUCTION
The Quad FM4 is a self poweredstereotunercoveringthe FM band
( 8 8- 1 0 8 M H z )o n l ya n d d e s i g n e dt o b e u s e di n c o n j u n c t i o w
n i t hQ u a da n d
similarhigh qualitypre.amplifiers.
The entireoperationof the tuneris controlledby a microprocessor
so that
the only controlson the tunerare an on/offswitch,tuningknob,and
preselectorbuttons.
Up to sevenstationscan be storedin the tunefs memoryand recalledat
the touch of a button.
l a n n e ri n t h e s e n s et h a tt h e
M a n u a tl u n i n gi s a c c o m p l i s h eidn t h e n o r m a m
tuningknob is turnedclockwiseto moveup the frequencyband and vice
versa.The frequencytuned is displayeddigitallyand a bar graphgives
indicationof signalstrengthand centrechanneltuning.
simultaneous
BFIEFINSTRUCTIONS
Plugthe A.C.and signalleadssuppliedintothe Quad ControlUnitsand
FM4.
Connecta suitable75 o aerial.
Switchon.
P r e s sl w l .
Tune in desiredstation.See list at the back of this book.
Pressand hold Fwl and pressdesiredpreset.
and greenLED lights,stationis storedin the
Whenred LEDextinguishes
tunefs memory.
INSTALLATION
T h e Q u a d F M 4 m a ye i t h e rb e u s e df r e es t a n d i n go r m o u n t e di n a c a b i n e t
p a n e lo f u p t o 1 5 m m t h i c k .
312 mmx 56 mm in
l f i t i s t o b e p a n e lm o u n t e dc u t a r e c t a n g u l aarp e r t u r e
the oanel.
Removethe two screwsfromthe rearof the coverand slidethe coveroff.
Insertthe tunerinto the aperturefromthe front,replacethe covertromthe
rear,insertthe two screwsand tightenuntilfingertight and then give one
additionalhalfturn to each screwto lock securely.
T h et u n e rr e q u i r e sn o v e n t i l a t i o n .
CONNECTIONS
T h e F M 4 i s s u p p l i e dw i t h l e a d sa n d c o n n e c t o rJso rd r r e c tc o n n e c t i o tno t h e
Quad ControlUnit.
A . C . M a i n sS u p p l y
This tuneris designedto operateon one rangeof A.C.mainsvoltageonly,
50 or 60 Hz,either110/120voltsor 220/240volts.
The designedoperatingvoltageol the tuneris clearlymarkedon the
back,
. UPPLY
CHECKTHATTHE
BEFORE
C O N N E C T I NTGOT H EA . C S
WSI T HT H A TO FT H E
V O L T A GM
E A R K E DO N T H EB A C KC O R R E S P O N D
A . C .S U P P L Y .
T h eA . C .m a i n si n p u ti s v i a t h e s t a n d a r d3 - p i nE u r oc o n n e c t osr u p p l i e d
w i t ht h e i n t e r n a t i o ncaol d e( s e eF i g .1 ) a n d w i l l n o r m a l l y
w i r e di n a c c o r d a n c e
be drawnfromthe outleton the rearof the Quad pre-amplifier.
Live(Brown)
N e u t r a(l B l u e )
Fig. 1
A . C .l r l o u tC o n n e c t oC
r EE22
f ugs e( 6 3 m Af o r 2 2 0 / 2 4 0 V , 1 0 0 mfAo r 11 0 / 12 0 V )h o u s e di n
A surge-resistin
To
the mainsinput receptaclein the rearpanel providesthe usualprotection.
o b t a i na c c e s st o t h e f u s e ,u n p l u gt h e m a i n ss u p p l ya n d u s e a s m a l l
to leveropen the drawercarryingthe fuse.(seeFig.2).
screwdriver
fuse has to be litted,makesurethat it is of the correct
lf a replacement
typeT
. h e m a r k i n gw i l l b e T 6 3 m A( T 10 0 m Af o r 1 1 0 V ) .
An unswitchedA.C.outlet
suppliesappropriateadditional
e q u i p m e nat n d t h e s h r o u d e dp l u g
suppliedwith the amplifier(wiredas
shownin Fig.3) is for use with this
outlet(see Fig.4).
The maximumsteadystate
current drawnfromthe A.C.outlet
shouldnot exceed4 amps.
Fig.2
Live(Brown)
Earth(Green/Yellow)
N e u t r a(l B l u e )
F i g .3
F i g .4
A . C .O u t p u tC o n n e c t oC
r E E 2 2c a b l ee n d e dp l u g .
A . C .a n d s i g n a l c o n n e c t i o n sf o r a t y p i c a l Q u a d i n s t a l l a t i o n .
5
Aerial
The performanceof the FM4 is entirelydependentupon the signal
strengthreceivedfromthe aerial.Optimumsignalto noisewill be achieved
with a signalstrengtho{ between1 mV and 100mVand not in excessof
500mV.
Your localaerialcontractoror Quad dealerwill be ableto adviseon the
antennasystemwhich will givethe best resultsin your area,but in most
casesa correctlyorientatedexternalmultielementarraywill give best results.
The FM4 is designedto operatefrom a standard75o cq'axialfeeder,and
indoorribbonaerialsshouldnot be used.
Output
Signaloutputis via phonosockets,clearlymarkedL (left)and R (right).
lf the tuneris usedwith a Quad 33/34/44controlunitwith a DIN input
lead.This may be
socket,you will need a S-pin-DlN-to-2-phono-plugs
obtainedfrom QUAD,or yourdealerby quotingpart numberQDsFP2A.
programmemodulation.
00mVfor 300/o
The outputof the FM4 is nominally'1
Controls
The Quad FM4 is equippedwith an on/offswitch,a tuningknob,seven
presetstationselectionbuttons,and a manualF*l buttonwhich is also used
in conjunctionwith one of the presetstationbuttonsto storea desired
frequencyin the tune/s memory.
The tunedfrequencyis displayeddigitallyand a twin bar graph provides
indicationof signalstrengthand centretuning.Stereo
simultaneous
lightthe stereoindicator.
transmissions
With
by the microprocessor'
All otherfunctionsare controlledautomatically
mutingand AFCare switchedout enabling
manuall**lselected interstation
all stations,whetherstrongor weakto be tuned in.Whena presetstationis
muteduntilthe desiredstationhas been
selectedthe tuneris automatically
correctlytuned.
revertsto it
The FM4 remembersthe laststationused and automatically
when switchedon.
The FM4 suppliedin the U.K.is providedwith presetstationbuttons
marked:[-Gl - Fora fourthBBC VHFChannel(whereavailable)
l-Etrl-BBC Badiol/2
- BBC Radio3
lBEcl
lry] - BBC Radio4
f \R-l- lndependentlocal Radio1
[,.I-]- Independentlocal Radio2
[.4c-l-seC LocalRadio
FM4s suppliedto the restof the world havepresetbuttons
marked f;-l to I-'--1.
o
Iti*,".
OPERATION
M a n u a lt u n i n g
Pressthe.l'^ilbutton.The red LEDwill light.Any desiredfrequencycan be
tuned usingthe tuning knob.Interstation
mutingand AFC are automatically
switchedout and all incomingstationscan be tuned in howeverweakthe
signal.The bar graph indicatesthe signalstrengthof the stationand when
properlytuned both sectionswill be of equal height.lf the leftsectionis
shorterthan the rightit is simplynecessaryto tune to the rightand vice versa.
Whenall but the top segmentsof the bar graphare lit the incomingsignal
1 mV).
strengthis sufficientto provideoptimumsignalto noise.(Approximately
Bar Graph
tro
l r
l l
t t
r l
t l
r
t
!
r
,
Signal/Noise
Stereo
1 m V( 6 0 d B D
70dB
1 0 0 p V( a 0d B D
55dB
( 2 0d B D
1OpV
30dB
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Approximate Signal
Strength
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Storing a Station
Once a stationhas been correctlytuned it can be storedon any of the
presetpositionssimplyby pressingand holdingdown the F*] buttonand
and the
pressing.the
requiredpreselectbuttonuntilthe red LEDextinguishes
one second.
greenLEDof the chosenpresetlights.Thistakesapproximately
The selectedfrequencyis now storedin the
Both buttonsare then released.
buttoniq
tuneis memoryand will be recalledwheneverthe pre-selected
pressed.To changethe frequencystoredin any presetpositionselectlru*| ,
tune in the desiredstation,pressF*l and hold,pressthe presetbuttonuntil
the green LED lights.The old stationis deletedfromthe memoryand the
new one stored.
-l
For example,to storeRadio3 Wrotham91.3mHzon the preset[E
proceedas followsPressli'*l'
Tuneto 91.3mHz.Observethat both sectionsof the bar graphare the same
height,the heightindicatingsignalstrength(seepage 7).
Pressand hold Fw I .
PresslE6-luntilthe green LEDlights.
Release F^il ano I E" I .
and frequenciesis givenat the end of
A list of BBC and IBA transmitters
this book.
Presettuning
frequencyhas beenselectedand storedin each of the
Once a transmitter
sevenpresetmemorypositions,manualtuningwill be an exceptionand
simple.Switchon the Quad ControlUnit
operationof the tuner is extremely
selectRADIOand the FM4
and the FM4.The ControlUnitwill automatically
will tune intothe stationlast used.To selectany of the othersix preset
stationspressthe appropriatepushbutton.
Whenthe FM4 is switchedoff the memoryis poweredby a smallbattery
which is rechargedwheneverthe set is on.The memorywill retainstored
stationsfor aboutfiveyearsif the set is not used at all.
Undernormaluse the lifeof the batteryis aboutten years.lf for any reason,
the FM4 is not usedfor a long period,and the batteryrunsdown it will be
necessaryto reloadthe memorywith presetstations.The batterywill be
rechargedwhilethe set is on. lf the batteryis flatthe tuner
automatically
revertslo manualTUNE.
automatically
Mono
When listeningto a veryweak station(typically3 to 4 segmentsof the bar
g r a p hi l l u m i n a t e da)s i g n i f i c a ni tm p r o v e m e ni nt t h e s i g n a lt o n o i s ec a n b e
made by switchingthe Quad controlunitto MONOand centringthe balance
however,to switchback to stereo
controlfor minimumnoise.Remember,
when changingstations.
8
De-Emphasis
FM broadcaSts
are preemphasised(accentuation
of the higher
priorto transmission
frequencies)
and mustbe deemphasisedat the receiver
to restorethe correcttonal balance.(Thisis simifarto the recordequalisation
procedurewith discs).The correctdeemphasisfor Britainand Europeis
Soprsec
and for NorthAmerica7spsec.Normallythis will havebeen
correctlyset priorto purchasebut the SOpsecequalisation
can be easily
convertedto 7spsecby addinga capacitorof 3.3nFin parallelwith each of
the existingcorrectioncapacitorsC44 and C45.Theseadditionalcapacirors
may be mostconveniently
locatedon the undersideof the printedcircuit
board.
SPECIFICATION
Frequencyrange
Sensitivity- 30dB quieting
50dBquieting
Full Limiting
S i g n a l / N o i s e- I n p u ts i g n a l1 k H za t
1 m V .A w e i g h t e d
Distortion- Inputsignal1 kHz+ 75kHz
+ 25kHz
Selectivity
Capture Ratio
lF Rejection
AM Suppression
lmage Reiection
Pilot Tone Suppression
Crosstalk at l kHz
Frequency Response - 2OHz-1SkHz
Output Level 3096 Modulation
Source lmpedance
RecommendedLoad lmpedance
A e r i a lI n p u t
De-emphasis
Power Input
Dimensions
Weight
88-108 M Hz
M o n o1 p V
Mono 2.7p.Y
Stereo25p,V
( lptV
M o n o7 6 d B
Stereo70dB
Mono0.15olo
Stereo0.15olo
Mono 0.05o/o
Stereo0.10olo
53dB
1.5d8
10 0 d B
60dB
80dB
60dB
-40d8
+0 -1dB
'100mV
10 0 o
> 20ko
75o unbalanced
SOprSec
or 75pSec
100-125 or 200-250V.
50-60Hz6VA.
3 2 1m m w i d e6 4 m mh i g h
2 0 7 m md e e p .
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