QUAD FMA User manual

F'M4
TIJNER
INSTRUCTION
BOOK
QUA
D

OURDFMA.
Tuner
INSTRUCTION
BOOK
CONTENTS
mber
Accessories
service. ..::.:. ::1:ii ;
Guarantee ......
...2
lntroduction ........3
Brief
Instructions. ........3
lnstallation .........4
Connections..... .........4
Operation ..........7
Deemphasis...... ........9
Specification.....
. ........9
U.K.
Transmitters.. .......12
ouAD ELECTROACOUSTICS
LTD.,
HUNTINGDON,
Cambs.,
PE187DB.
TelephoneNo.:
Huntingdon
(0480)
52561
Telex 32348
QUAD
G
Quad
isa registeredtrade
mark
orF4SECrSS6

Accessories
TheFM4
issuPPlied
with
1x
A.C.Lead
1xSignal
Lead
1x
AerialConnector
Service
lfservicing
isrequired
the
tuner
should
bereturned
to
thesupplier'
the
distributor
lor
thecountry
ofpurchase
ortoQuad
Electroacoustics
Ltd.
Abrief
noteshould
beenclosed
giving
your
name
and
address
and
the
reason
forreturning
it.
QUAD
offers
same-day
service
from
Monday
toFridayexcept
torbank
holidays.
The
mapbelow
shows
where
tofindus.
Please
call0480
52561
to
make
anappointment.
IMPORTANT
THECARDBOARD
CARTON
ANDEXPANDED
POLYSTYRENE
PACK
SHOULD
BERETAINED
IN
CASE
THEUNIT
HAS
TOBE
RETURNED
TO
THE
MANUFACTURER
OR
DISTRIBUTOR
FOR
SERVICE.
Guarantee
This
tuner
is
guaranteed
against
anydefect
inmaterialand
workmanship
fora period
of
twelve
months
from
thedate
ofpurchase'
within
this
oeriod
weundertake
tosupply
replacement
parts
free
oicharge
orovided
that
failure
wasnot
occasioned
bymisuse,
accident
ornegligence.
Freight
and
labour
costs
are
notcovered
unless
by
localagreement'
Witnin
tne
U.K.the
guarantee
offered
withthis
equipment
does
not
limit
the
consumeds
existing
statutory
rights.
Aseparate
guarantee
card
isnot
supplied
with
your
Quad
unit.
Your
guarantee
begins
onthe
dayon
which
you
takedeliverY.
circuit
diagrams
and
service
data
forthisQuad
product
areavailable
from
the
manufacturer
ordistributor
{orasmall
charge.
QSPESSA
QP2P2SA
PPL734A

INTRODUCTION
The
Quad
FM4is
aself
powered
stereo
tunercoveringtheFMband
(88
- 108
MHz)onlyanddesigned
to
beused
in
conjunction
with
Quad
and
similarhigh
qualitypre.amplifiers.
Theentireoperationofthe
tuneris
controlledbya microprocessor so
that
theonlycontrolsonthe
tuner
areanon/offswitch,
tuningknob,and
preselector
buttons.
Uptosevenstationscanbestored
in
thetunefsmemory and
recalled
at
thetouchofa button.
Manualtuning
is
accomplished
inthenormalmannerinthesensethatthe
tuning
knobisturned
clockwise
tomove
up
thefrequencybandandvice
versa.Thefrequencytuned
is
displayeddigitallyanda bar
graphgives
simultaneous
indicationof
signal
strengthand
centre
channeltuning.
BFIEF
INSTRUCTIONS
Plugthe
A.C.
andsignalleadssupplied
intothe
Quad
ControlUnitsand
FM4.
Connectasuitable75o aerial.
Switchon.
Press
lwl.
Tuneindesiredstation.See
list
at
the
backof
this
book.
Pressandhold
Fwland
press
desired
preset.
WhenredLEDextinguishes
and
green
LEDlights,
station
is
stored
inthe
tunef
s memory.

INSTALLATION
The
Quad
FM4
mayeitherbeused
free
standing
or
mounted
in
acabinet
panel
ofup
to15
mmthick.
lfit
istobe
panel
mountedcut
arectangular
aperture312
mm
x56mm
in
theoanel.
Removethe
twoscrews
fromthe
rearofthecover
andslide
thecover
off.
Insert
thetuner
intotheaperture
fromthefront,
replacethecover
trom
the
rear,insertthe
twoscrews
andtightenuntil
fingertightand
then
give
one
additional
halfturntoeach
screw
tolocksecurely.
Thetunerrequires
noventilation.
CONNECTIONS
The
FM4issupplied
with
leadsandconnectors
Jordrrect
connection
tothe
Quad
Control
Unit.
A.C.
MainsSupply
Thistuner
isdesigned
tooperate
ononerange
ofA.C.
mainsvoltageonly,
50or60 Hz,
either
110/120voltsor
220/240volts.
Thedesigned
operating
voltageolthetuner
isclearly
marked
onthe
back,
BEFORECONNECTING
TO
THEA.C.SUPPLYCHECKTHATTHE
VOLTAGE
MARKEDON
THE
BACKCORRESPONDS
WITHTHATOF
THE
A.C.SUPPLY.
The
A.C.mainsinput
isviathestandard
3-pin
Euro
connector
supplied
wiredinaccordance
withthe
internationalcode
(see
Fig.1)andwill
normally
bedrawn
fromthe
outleton
therearofthe
Quad
pre-amplifier.
Live
(Brown)
Neutral
(Blue)
Fig.1 A.C.lrloutConnector
CEE22
Asurge-resisting
fuse
(63mA
for220/240V,100mA
for110/1
20V)housed
in
themains
input
receptacle
intherear
panel
provides
theusual
protection.
To
obtainaccess
to
thefuse,unplug
themainssupply
andusea
small
screwdriver
toleveropen
thedrawer
carrying
the
fuse.
(see
Fig.2).
lfa replacement
fusehas
tobelitted,
makesure
thatitisofthecorrect
type.
Themarking
willbe
T63mA
(T1
00mA
for110V).

Fig.2
Anunswitched A.C.
outlet
supplies
appropriateadditional
equipmentandtheshrouded
plug
supplied
with
theamplifier
(wired
as
showninFig.
3)isfor
use
withthis
outlet
(see
Fig.4).
Themaximum
steady
state
current
drawn
from
theA.C.outlet
shouldnot
exceed
4 amps.
Live
(Brown)
Earth
(Green/Yellow)
Neutral
(Blue)
Fig.3 A.C.Output
ConnectorCEE22cable
ended
plug.
Fig.
4 A.C.and signalconnectionsfor
a typical
Quad
installation.
5

Aerial
The
performance
oftheFM4
is
entirelydependent
upon
the
signal
strength
received
fromtheaerial.Optimum
signal
tonoisewillbe
achieved
with
asignal
strength
o{between
1mVand100mVand
notinexcess
of
500mV.
Your
localaerialcontractor
or
Quad
dealer
willbeable
toadvise
onthe
antenna
system
whichwill
give
the
best
results
in
your
area,but
inmost
casesa correctly
orientatedexternal
multielement
array
will
give
best
results.
TheFM4
is
designed
tooperate
fromastandard
75o cq'axial
feeder,
and
indoorribbonaerials
should
notbeused.
Output
Signaloutput
isvia
phono
sockets,
clearly
markedL
(left)
and
R
(right).
lfthetuner
isused
with
aQuad
33/34/44control
unit
with
a DIN
input
socket,
you
will
needaS-pin-DlN-to-2-phono-plugs
lead.This
maybe
obtained
from
QUAD,
or
your
dealer
by
quoting
part
number
QDsFP2A.
Theoutputofthe
FM4isnominally'100mV
for300/o
programme
modulation.
Controls
The
Quad
FM4isequipped
withanon/off
switch,a
tuningknob,seven
preset
stationselection
buttons,and
a manual
F*l button
whichisalsoused
in
conjunction
withone
ofthe
preset
station
buttons
tostoreadesired
frequencyinthetune/s
memory.
Thetunedfrequency
isdisplayed
digitallyand
atwinbar
graph
provides
simultaneous
indication
ofsignalstrength
andcentre
tuning.Stereo
transmissions
lightthestereo
indicator.
Allotherfunctions
arecontrolled
automatically
bythemicroprocessor'
With
manual
l**lselectedinterstation
mutingand
AFCareswitched
outenabling
allstations,
whetherstrong
orweak
tobe tuned
in.Whena preset
station
is
selected
the
tunerisautomatically
muteduntil
thedesired
station
hasbeen
correctly
tuned.
TheFM4
remembers
thelaststationused
andautomatically
reverts
toit
whenswitched
on.
TheFM4supplied
intheU.K.
is
provided
with
preset
station
buttons
marked:-
[-Gl
- Forafourth
BBC
VHFChannel
(where
available)
l-Etrl-
BBC
Badiol/2
lBEcl
- BBCRadio
3
lry] - BBC
Radio4
f \R-l
- lndependent
localRadio1
[,.I-]
- Independent
localRadio
2
[.4c-l-
seC Local
Radio
FM4s
supplied
tothe
restof
theworld
have
preset
buttons
marked
f;-l toI-'--1.
o
Iti*,".

OPERATION
Manualtuning
Press
the.l'^ilbutton.
TheredLEDwilllight.Any
desired
frequencycanbe
tuned
using
thetuningknob.Interstationmuting
and
AFCareautomatically
switchedout
and
allincomingstationscan be
tunedinhoweverweakthe
signal.
Thebar
graph
indicatesthesignalstrengthofthestationand
when
properly
tunedbothsections
will
beofequalheight.
lf
the
left
section
is
shorterthanthe
rightitis
simply
necessarytotunetotherightandviceversa.
Whenallbutthetopsegmentsofthe
bar
graph
arelittheincomingsignal
strength
is
sufficient
toprovide optimumsignalto noise.
(Approximately
1mV).
Bar
Graph
tro \
lr I
ll,
tt I
rl \
tl I
rr I
tr I
!r I
rt I
trtr I
oo I
88l
rl t
rr I
rr t
rl I
ll I
TI I
trtr \
otr |
"'8
|
trB t
oo
I
os I
ll I
Ir I
tl I
Approximate Signal
Strength
1mV
(60
dBD
100pV
(a0
dBD
1OpV
(20
dBD
Signal/Noise
Stereo
70dB
55dB
30dB

Storing a Station
Once
a station
hasbeen
correctly
tuneditcanbe
stored
onanyof
the
preset
positions
simplyby
pressing
and
holding
down
the
F*] button
and
pressing.the
required
preselect
buttonuntil
the
red
LEDextinguishes
and
the
green
LEDof
thechosen
preset
lights.Thistakes
approximately
one
second.
Bothbuttons
arethen
released.
Theselected
frequency
isnowstored
inthe
tuneismemoryand
willbe
recalled
whenever
the
pre-selected
button
iq
pressed.
Tochange
the
frequency
stored
in
any
presetposition
select
lru*
|
,
tune
inthe
desiredstation,
press
F*l and
hold,
press
the
preset
buttonuntil
the
green
LED
lights.
Theoldstation
isdeleted
from
the
memoryand
the
newonestored.
Forexample,
tostoreRadio
3 Wrotham
91.3mHz
onthe
preset
[E-l
proceed
asfollows
-
Press
li'*l'
Tuneto91
.3mHz.Observe
thatbothsections
ofthe
bar
graph
are
thesame
height,the
height
indicatingsignal
strength
(seepage
7).
Press
and
hold
Fw
I.
Press
lE6-l
until
the
green
LEDlights.
Release
F^il anoI
E"
I .
A listofBBCand
IBAtransmittersand
frequenciesis
given
attheend
of
thisbook.
Preset
tuning
Onceatransmitter
frequency
hasbeenselected
andstored
ineachof
the
seven
preset
memory
positions,
manual
tuningwillbeanexception
and
operationof
thetuner
is
extremely
simple.Switch
onthe
Quad
Control
Unit
and
theFM4.
TheControlUnit
willautomaticallyselect
RADIOand
the
FM4
willtune
intothestation
lastused.
To
select
anyof
theothersix
preset
stations
press
theappropriate
pushbutton.
Whenthe
FM4isswitched
offthememory
ispowered by
asmallbattery
which
isrecharged
whenevertheset
ison.The
memorywill
retainstored
stations
foraboutfive
years
iftheset
isnot
used
atall.
Under
normaluse
thelifeofthebattery
isabout
ten
years.
lf
for
any
reason,
theFM4is
not
used
fora long
period,
andthe
battery
runs
down
it
will
be
necessary
toreload
thememory
with
preset
stations.
Thebattery
willbe
automatically
recharged
whilethesetison.
lfthebattery
isflatthetuner
automatically
reverts
lo manualTUN
E.
Mono
When
listeningtoavery
weakstation
(typically
3 to
4 segments of
thebar
graph
illuminated)a
significant
improvementinthe
signaltonoise
canbe
madebyswitching
the
Quad
controlunit
to MONOandcentring
thebalance
control
forminimum
noise.Remember,
however,toswitchback
tostereo
whenchangingstations.
8

De-Emphasis
FM
broadcaStsare
preemphasised
(accentuation
ofthehigher
frequencies)
prior
totransmission
andmust
bedeemphasised
atthereceiver
torestore
the
correcttonal
balance.
(This
issimifar
totherecord
equalisation
procedure
withdiscs).The
correctdeemphasis
for
Britain
andEuropeis
Soprsec
andforNorth
America7spsec.
Normally
thiswill
have
been
correctly
set
prior
topurchase
butthe
SOpsecequalisation
can
beeasily
converted
to7spsec
byadding
a capacitor
of3.3nFin
parallel
with
eachof
theexisting
correction
capacitors
C44
andC45.These
additionalcapacirors
may
bemost
convenientlylocated
onthe
undersideofthe
printed
circuit
board.
SPECIFICATION
Frequency
range
Sensitivity
- 30dBquieting
50dB
quieting
FullLimiting
Signal/Noise
- Input
signal1kHz
at
1mV.Aweighted
Distortion
- Input
signal
1kHz
+ 75kHz
+ 25kHz
Selectivity
Capture Ratio
lF Rejection
AMSuppression
lmageReiection
Pilot
ToneSuppression
Crosstalkat l kHz
FrequencyResponse
- 2OHz-1SkHz
Output Level
3096Modulation
Source
lmpedance
Recommended
Loadlmpedance
Aerial
Input
De-emphasis
Power
Input
Dimensions
Weight
88-108MHz
Mono
1pV
Mono
2.7
p.Y
Stereo25p,V
( lptV
Mono
76dB
Stereo
70dB
Mono
0.15olo
Stereo
0.15olo
Mono
0.05o/o
Stereo0.1
0olo
53dB
1.5d8
1
00dB
60dB
80dB
60dB
-40d8
+0
-1dB
'100mV
100o
> 20ko
75o
unbalanced
SOprSecor75pSec
1
00-125or200-250V.
50-60Hz
6VA.
321
mm
wide
64mmhigh
207mm
deep.
3Ks.