Grundig T 7500 User manual

perating instructions |
Mode d’emploi ~
Istruzioni per |'uso
Gebruiksaanwijzing
Instrucciones de manejo

Wire bridge horizontal = AM and FM (300 © and 75 Q)
aerials connected.
Wire bridge vertical = aerials separated.
Boucle en position horizontale = antennes AM et FM
(300 2 et 75 Q) internément liées.
Boucle en position verticale = antennes AM et FM
séparées. .
:
Me
Ponticello in posizione orizzontale = antenne AM e FM
(300 0 e 75 Q) collegate internamente.
Ponticello in posizione verticale = antenne AM e FM
separate.
Draadbrug horizontaal = antennes voor AM en FM
(300 © en 75 ©) doorverbonden.
Draadbrug verticaal = antennes gescheiden.
Puente de alambre horizontal = antenas para AM y FM
(300 0 y 75 Q) unidas.
Puente de alambre vertical
= antenas separadas.

SoaUMtiGaneMTES
EARS

This tuner contains a microcomputer which
controls not only all the tuning operations of
the high-precision synthesiser, but also
-quickly and effectively processes the data |
for up to 15 preset VHF, MW or LW stations.
Among the extra operating facilities of the
T 7500 are: -
@ Manual tuning either in discrete steps or
in large steps for high speed.
@ Automatic station location (self-seek) in
both directions with an automatic check on
the reception quality of each station located.
@ A memory which can be programmed for
up to 15 stations (VHF, MW or LW).
@ Memory facility for station abbreviations
containing up to 4 letters and/or figures
which appears immediately whenever the
corresponding station is selected
(alphanumeric station identification).
@ GRUNDIG TUNOSCOPE® as an aid to
precise tuning of stations.
@ Pre-programming of mono or stereo
reception in the case of VHF stations.
@ High dynamic selectivity for VHF stations,
even if the signal strength is high.
@ Switchable muting on all wavebands.
@ Memory scan for rapidly reviewing and
selecting the preset stations.
® Registered trade-mark
@ FREE button for indicating unallocated
preset station numbers.
@ Compare function for preventing alloca-
tion of more than one station number to the
same station. When a station is located by .
the automatic location system, the result of
comparing the memory contents is automati-
cally shown immediately after the check
phase.
@ Non-volatile memory which does not
require a battery. The data in the memory is
retained even if there is a mains failure.
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‘Controls and Sockets |
The
controls
of
the
T
7500
are
so
designed
that
buttons
used
frequently
have
a
bright
finish,
while
subsidiary
function
buttons
are
coloured
an
unobtrusive
black.
@ Mains (POWER) Switch —
Button pressed in = tuneron
Button released = tuner off
© Selected Waveband Display
FM = VHF
MW = medium wave
LW. = long wave
© Display
For indicating the frequency tuned to or
the station abbreviation, and various
information
on
the
station
numbers,
viz.
NEW, FREE (= not allocated), FULL.
@ Display showing the function being
performed or the station number.
HA = manual tuning
AS = automatic station location
CH = station check after
automatic location
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© Illuminated Display indicating:
STORE = Memory ready to receive
data |
FM STEREO = Stereo reception
FM MONO = Mono reception
MUTING = Muting
© Tuning Meter
Indicates signal-strength (AM) or
fieldstrength (VHF).
@ TUNOSCOPE
The
central
green
light
comes
on
when
tuning is precise.
©
L.S.M.
(Last
Station
Memory)
Indicator
This must light up before the tuner is
switched
off
if
the
same
station
is
to
come
back on automatically when the set is
switched on again.
© STORE Button
Press to enter station information in
memory before allocating a number to
the station.
@ Station Selection Buttons
For selecting the pre-set stations 1 - 15.
@ Waveband Seiection Buttons
FM = VHF —
MW = medium wave
LW = long wave
@® Manual Tuning Buttons
Press DOWN button to reduce fre-
quency,
press UP button to increase frequency.
In each case the rate of tuning can be
increased by pressing the centre button
(FAST) as well.
@®
Start
Buttons
for
Automatic
Station
Location
(AUTO-SEARCH):
Press
¢
to
decrease
frequency,
press
>
to
increase
frequency.
(With
control
for
adjusting
station
location
threshold
in
middle).
@ MEMORY-SCAN Buttons
To review the allocated station numbers
in sequence press one of these buttons:
4 = review in decreasing sequence
>
=
review
in
increasing
sequence.
@ FREE Button
Checks through pre-set stations and
shows any unallocated numbers in the
display @. Can also be used to erase
data from memory when pressed after
pressing the STORE button.
@ COMP. Button
Compares any frequency tuned to with
those of stations already in the memory,
and if it has already been entered,
indicates
the
station
number
allocated.
If
it is not yet stored in the memory, the
word NEW will appear in the display.
® MONO Button
For switching over to mono reception on
VHF, eg: if stereo broadcasts are subject
to interference.

@® MUTING Button
For muting the sound between stations
when tuning.
@ A-2Z/0-9 Button
Press to enter a station abbreviation with
the tuning buttons @.
@ SHIFT Button
Moves the station abbreviation symbols
entered in the display @ one place to the
left.
@ FREQ./NAME Button .
Switches the station display from station
abbreviation to frequency and vice versa. —
-® Sockets for AM aerial
(LW and MW)Y , |
earth < and 300 2 VHF dipoles"I=
® Coaxial socket for 75 0 aerial.
@ Level Control
For adjusting output voltages at sockets
@ and @).
@ DIN Output Socket
For (pre)amplifier
@ Phono Sockets
For (pre)amplifier.
Positioning
If hifi units are placed above each other in
racks, in cabinets or in table-top racks, the
amplifier or preamplifier should always be at
the top.
In the GRUNDIG hifi range you will find
suitable racks and Compact Systems for
your GRUNDIG hifi units. Your dealer wiil be
pleased to advise you.
Important:
Do not site mains cables near audio input
leads such as those from the record deck,
cassette deck, tuner or loudspeakers.
Mains Connection
The tuner is designed to operate only from
AC mains (50/60 Hz). The mains voltage to
which it is adjusted in the factory is specified
on the back of the set. Changes to other
voltages should only be carried out by the
dealer in accordance with the data given in
the set.
Additional Information for Sets Used in
Great Britain
We recommend that a 13 amp 3-pin plug
fitted with a 3 amp fuse be used. The brown
lead must be connected to the live pin
(marked “L” or “red” or “brown”) and the
blue to the neutral pin (marked “N” or
“black” or “blue”). On no account should
either wire be connected to the earth pin
(marked “E” or “green/yellow”). If other
mains plugs are used, ensure that they are
protected with a 3 amp fuse.
Sets sold in Great Britain are suitable for
operation from a mains supply of 240 V AC.

Connection to an Amplifier
There is a choice of two outputs for connec-
ting to an amplifier:
@ The DIN socket @ with adjustable output
voltage. To match the tuner to amplifiers
made by other manufacturers, the output
voltage can be varied between 175 and 1500
mV with 40 kHz deviation and
1000 Hz modulation using the level control
@). With this contro! in its centre lock-in
position the output voltage is 800 mV. A —
suitable connecting cable is supplied with
the tuner (GRUNDIG cable 379a).
_ -@ The two phono sockets @). These are in
- parallel with the DIN socket @ and the output
level can therefore also be adjusted with
control @).
A control voltage is available at the DIN
output socket which allows suitably designed
(pre)amplifiers to be switched on and off
together with the tuner. Example of a
suitable
unit
the
GRUNDIG
is
XV
7500.
The
GRUNDIG cable 392 (included with the
amplifiers), which has the necessary control
lead in it, may be used for connection.
lf required, the output sockets can be used
for recording on tape. The DIN socket @
provides an output of 0.87 mV/kQ (for 40 kHz
deviation and 1 kHz modulation frequency).
The phono socket @ may be used as a
voltage source for high-level recordings |
(800 mV with the level control @ in the
central lock-in position).
_ Aerials
In good reception areas or in the neighbour-
hood of transmitters it is possible to obtain
good reception with a simple room dipole,
eg: the GRUNDIG VHF indoor aerial.
However, to obtain optimum reception
quality itis essential to install a good outdoor
VHF dipole aerial. This is especially true of
stereo broadcasts, which require an aerial
voltage about ten times higher than for mono
reception. Makeshift aerials will no longer be
satisfactory in this case and will be no more
than an expediency, especially in unfavoura-
ble reception areas, eg: in mountainous
regions or in areas distant from the VHF
transmitter. The outdoor dipole should be
mounted as high as possible and should be
free-standing on the roof.
The flat pin sockets @& for aerials and earth
are at the back of the set. The sockets
marked =rare for connecting a 300 0 VHF
dipole. The VHF outdoor dipole may be used
not only for receiving VHF, but in case of
necessity, also the AM wavebands (MW and
LW), if the wire bridge between the flat pin
sockets
is
inserted
horizontally
(see
sketch
on page 2). If two separate aerials are used
for AM and VHF, the wire bridge should be
inserted vertically between the flat pin
sockets (one contact not connected). This
ensures
there
will
be
no
interaction
between
the two aerials. |
The socket marked Y is a high-inductance
socket for an outdoor AM aerial. A 75 Q
aerial
system
can
be
connected
to
the
coax
socket
@.
It
can
also
be
used
for
AM
ifthe
¥
AM
aerial
socket
is
connected
by
inserting
the wire bridge horizontally (as above).
Your dealer is familiar with local reception
conditions and will be pleased to advise you
on
achoice
of
aerial
system
and
method
of
installation.
Switching On and Off
The
tuner
can
be
switched
on
and
off
with
the
POWER
switch
@.
The
first
time
it
is
switched
on,
“FM
87.50
MHz
HA”
will
appear
in
the
alphanumeric
display.
On
later
occasions
the
frequency
or
identifying
-
abbreviation
of
the
station
tuned
to
before
the
tuner
was
switched
off
will
be
displayed;
however,
for
this
to
happen,
the
tuner
must
be
left
on
the
station
concerned
for
at
least
2
min.
(indicated
by
the
L.S.M.
indicator
@
lighting
up
—
see
section
entitled
“L.S.M.
Indicator”).
Waveband Selection Buttons @
These
buttons
select
the
required
waveband
(VHF,
MW,
or
LW)
for
manual
tuning
or
automatic
station
location.
FM = VHF 87.50- 108MHz
MW
=
Mediumwave
522-1611
kHz
LW
=
Longwave
155-
353kHz
The
waveband
selected
is
shown
in
the
extreme left-hand display @.

Manual Tuning |
The set can be tuned to stations manuaily
with the group of buttons @ marked
“MANUAL TUNING”. The frequency tuned
to is shown in the display @, and the
appearance of the letters “HA” in the display
@ indicates the set is in the manual tuning
mode. Muting, ie: suppression of inter-sta-
tion noise during tuning, can be switched on
with the MUTING button @ (“MUTING”
appears in the display @).
@ Pressing the DOWN button (4) reduces
the frequency, while pressing the UP button
(»)
increases
it.
To
change
the
frequency
in
_ single steps, quickly press and release the
tuning button concerned (step size 25 kHz
on VHF, and 1 kHz on MW and LW). If the
button is held down the number of steps per
second increases from 1.5 to 8. If the centre
button (FAST) is also pressed, the rate of
~ tuning is further increased to 20 - 27 tuning
steps per second with steps of 100 kHz on
VHF, 5 kHz on MW and 1 kHz on LW (in
these circumstances muting is automatic
and cannot be switched off).
@ The TUNOSCOPE® indicator @ provides ©
an aid for precisely tuning the set to stations
whose frequency is not known. When a VHF >
station is approached during tuning the red
triangle on the right or left (depending on the
direction of tuning) of the TUNOSCOPE will
light up. The illuminated triangle indicates
whether further tuning should be towards
higher or lower frequency and consequently
which of the tuning buttons @ should be
used. When tuning is correct, the green
indicator in the TUNOSCOPE will light up.
Illumination of the two red LEDs or flickering
of the TUNOSCOPE indicates that the
fieldstrength of the station being received is
too weak.
In the MW and LW bands only the green
indicator lights up. This happens when a
station of sufficient strength is being received
onacentre frequency in the European 9 kHz
frequency raster. This therefore provides a
precise tuning aid since strong MW and LW
stations often do not give a clear maximum
reading on the signal-strength meter.
® Registered trade-mark
@ The signal- or fieidstrength of any station
tuned to is shown by the chain of LEDs @,
while the exact frequency of the station can
be read off in MHz or kHz from the display @
- once the station has been precisely tuned to.
In the case of VHF stations the third place
after the decimal point is not shown in the
display, but can be determined from the
second
decimal
place
because
of
the
25
kHz
tuning raster, ie: .00(0),. .02(5), .05(0),
.07(5), etc.
FM Stereo Reception.
lf a stereo broadcast is being received, the
“FM-STEREO’ will light up in the display @.
lf the set is being manually tuned, it may,
however, have been switched to mono
(“FM-MONO’” fit in display @) and it will be
necessary to press the MONO button @ to
receive stereo broadcasts in stereo. When
the automatic station location system is
used,
the
tuner
is
reset
for
stereo
reception
every time a change is made.
If stereo reception is subject to interference
or noise, reception may be improved by
switching to mono by pressing the MONO
button @.
VHF Fieldstrength Indicator
if several VHF transmitters carrying the
same programme are received at different
fieldstrengths, ie: the incoming strength is
different this indicator can be used to
determine which is the strongest, and the set
tuned accordingly.
As a result of the sensitivity of the tuner,
mono transmitters which are only slightly
obove the general noise level can-give good
reception.
1uV — - S0pV 300pV 0 SMV
1OouV 100nvV imV = 10mV
The specified aerial input voltages are approx. values
for 75 2. impedance (for 300 0 impedance the figures
are doubled).

Noise-free reception of stereo transmitters
however requires an aerial voltage which is
approx. ten times higher than for mono
transmitters. This is due to the system of
stereo broadcasting used. The minimum
_ aerial voltage with which this tuner can be
operated is around 20 ;V. Below this figure
the noise level will increase.
MUTING Button |
If muting is switched on with MUTING butto
@® (“MUTING’ lit in display @), the noise
between stations during tuning is sup-
pressed. The muting only stops when a
station
has
been
tuned
to
precisely
(green
TUNOSCOPE indicator lit up). It should be »
borne in mind that the muting system also
mutes stations whose strength is below a
certain threshold level to which the set is
adjusted to in the factory. |
. Automatic Station Location
(AUTO-SEARCH)
The
automatic
station
location
system
scans
the VHF band in 50 kHz steps, and the
‘mediumwave and longwave bands in the 9
kHz raster. The exact frequency of any
station
located
with
this
system
is
shown
in
the
display
©,
while
the
green
lightinthe
|
TUNOSCOPE
@
indicates
that
the
station
is
precisely
tuned.
:
The
chain
of
LEDs
@
indicates
the
signal-
or
fieldstrength of the station concerned.
During automatic station location muting is
automatic and cannot be switched off.
@ Automatic station location is initiated by
pressing and releasing one of the buttons ®
(
4
=
decreasing
frequency,
>
=
increasing
frequency). in addition to the frequency, the
letters “AS” (automatic search) appear in
the display @.
@ Once the automatic station location
system
has
found
a
station,
it
takes
5
secs.
to
check the reception quality, during which
time “CH” appears in the display @. If the
reception is poor, the check procedure is
interrupted and the automatic station
location process automatically restarted
(“AS” again appears in the display @). If
however,
the
station
is
suitable
for
reception
a short check of the memory contents
(Auto-Compare
procedure)
is
made
and
the
display @ then shows “HA” (= manual
tuning).
When Auto-Compare procedure is complete
any of the following items may appear in the
display:
@ “NEW’ will appear for 2 secs. in the
display
@
if
the
station
found
has
not
already
been entered in the memory.
@ The station number (1 - 15) will appear in
the display @ for a short time if the frequency
has already been entered in the memory.
@
The
station
abbreviation
will
be
shown
in
the display @ if it has been entered in the
memory
in
addition
to
the
frequency
shown.
Example:
97.90 MHz + BAY 3 has been stored under
station
number
4.
Automatic
station
location
is started, say, at 97 MHz and stops at 97.90
MHz.
Initial
display:
97.90MHz
“CH”
displayed
for
5
secs.
then
BAY
3
“4”
displayed
for
2
secs.
finally
BAY
3
If
no
abbreviation
has
been
entered
in
the
memory,
the
display
will
show
97.90
MHz
throughout.
|
“HA” displayed continuously.
The automatic station location procedure
can be stopped at-any time, either by
pressing one of the AUTO-SEARCH start
buttons
@
or
one
of
the
tuning
buttons
@
or
a
station
button
@.
At
the
end
of
the
wave-
band
the
station
location
process
does
not
stop
automatically,
but
scans
the
waveband
concerned again in the same direction. The
system is designed for high reliability.
A knurled knob is located between the two
AUTO-SEARCH
start
buttons
which
can
be
used
to
match
the
station
location
sensitivity
to the reception locations or aerials. If one
wishes
to
receive
weak
stations,
the
knurled
knob should be turned anti-clockwise.
Turning
the
knob
clockwise
will
increase
the
station
location
threshold
and
only
strong
stations will be tuned to.
(Minimum and maximum values for the
station
location
threshold,
see
specifica-
tions). 7

Presetting Stations
The tuner has a memory capable of storing
up to 15 stations. The station positions can
be selected with the station selection buttons
@ and the number of the position can be
read in the display @. !f no station frequency.
has been entered for a given station position
“FREE” will appear in the display @ fora
short time. Each of the station positions can
be programmed for any station frequency in
the VHF, MW or LW band, and in addition an
abbreviation of the station name can be
entered to help identify it. The latter will
appear in the display @ and not the fre-
quency when the station is selected. For
' VHF stations it is also possible to prepro-
gramme each station entered in the memory
for mono or stereo (if it is broadcast in
stereo). 7 oe
@ If astation has been found by tuning
_manually or with the automatic station
location system and is to be entered in the
memory, the STORE button @ should first
be pressed. The “STORE?” will then light up
in the display @. The desired station number
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is then selected by pressing the correspond-
ing station button (group of buttons @) and
the station is then immediately entered in the
memory. The station number is shown in the
display. | |
@® The memory is only ready to receive data
if “STORE?” is lit up in the display @ (stays on.
each time for about 30 secs.). The storage
procedure can be termined before the
30 secs. has elapsed by pressing the
STORE button @ a second time or by
selecting manual tuning or automatic station
location.
@ The abbreviation for the station eg: WOR
2 can either be entered in the memory at the
same time as the station frequency or at a
later date. :
To enter the abbreviation proceed as
follows: hold the small button @ marked
A - Z/0 - 9 down and press the DOWN or UP
manual tuning button ® until the first letter or
number in the abbreviation appears in the
extreme right-hand position in the display @.
Once the required symbol has been entered
(in this example the letter “W’”), it should be
moved to the left by pressing the SHIFT
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button @& to make room for the next symbol!
(in this case “D”). The procedure is contin-
ued until all the required symbols have been
entered (maximum four). In the symbols
available there is a gap between 9 and A (or
vice versa). To enter a gap in the abbrevia-
tion press the SHIFT button @ twice in
succession. If a mistake is made in the entry
or a change is required, some ‘or all of the
symbols will have to be changed. Each time
the SHIFT button @ is pressed, the series of
symbols moves one place to the left and the
symbol on the extreme left is deleted. A new
symbol can then be entered in the extreme
right-hand position. Once the abbreviation
for the station has been entered, it can be
stored in the memory by first pressing the
STORE button @ and then the appropriate
station button. When the station is selected
the abbreviation will appear in the display.
To check the frequency the display @ can be
switched to frequency by pressing the |
FREQ./NAME button @).
@ For VHF stations it is possible to enter in
the memory whether a given station should
be received in mono or stereo. After tuning
the VHF station switch to MONO or STEREO
(“FM-MONO” or “FM-STEREO” lit in the
display @) using the MONO button @ and
enter the information in the memory as
described above. This can also be done ata
later date. itis, of course, possible to change
this programming later if required. The
content of the memory is not affected if the
mono switch is operated once the informa-
tion has been entered in the memory.
@ Station data can be transferred from one
station position to another (together with the
abbreviation for the station concerned and
the mono/stereo information). As usual, the
STORE button @ has to be pressed before
selecting the new station position. After the
transfer the original station position retains
its contents. However, it is possible to erase
the contents of any station memory position
so that if the position is selected “FREE” will
appear in the display (see section entitied
“FREE Function”).
10

To summarise, the sequence of operations
for entering the frequency, station abbrevia-
tion and mono/stereo information in a station
memory position is as follows: ,
1) Tune to the station frequency,
2) Enter the abbreviation for the station and,
if necessary, the stereo/mono informa-
tion, |
3) Press the STORE button ©. .
4) Press the button (group of buttons @) for
‘the required station position.
The sequence for entering the abbreviation
for the station and/or the mono/stereo |
information at a later date is as follows:
1) Select the station by pressing the pre-set |
station button (group of buttons @),
2) Enter the station abbreviation and/or the
mono/stereo information,
3) Press the “STORE” button @,
4) Press the appropriate station button
again.
FREE Function
To ensure that the station position has not
yet been allocated before entering a station
inthe memory and therefore accidentally
erasing a station previously allocated to the
same station number, the FREE button @
may be pressed to check which numbers are
free or unallocated. Next to the word “FREE”
in the display @, the unallocated numbers
will then appear in succession in the display
@ as long as the FREE button @ is pressed.
If all the station numbers have been
allocated, the word “FULL” will appear in the
display ©.
@ If you wish to erase the data allocated to
a station number, simply select the number
concerned and press the STORE button ©
and the FREE button @. The number will
then become one of the unallocated ones
(this can be checked by pressing the FREE
button). ,
MEMORY-SCAN Buttons @
These buttons can be used to select a
pre-set station indirectly. The allocated
numbers can be selected in sequence in the
downward ( 4) or upward (> ) direction, free
locations being skipped over automatically.
It is possible to go through the station
memory positions in single upward or
downward steps by quickly pressing and
releasing buttons @. If the buttons are held
down, the display moves on to the next
allocated station number every 2 secs.
COMP. Button ©
The COMP. (“COMPARE”) button can be
used to establish whether a station fre-
quency which has just been tuned to has
already been allocated to one or more of the
station pre-set buttons. If so, the station
numbers and their identifying abbreviations
(if entered in the memory) can be read off in
the display @ while the COMP. button is held
down. If, however, a frequency has not yet
been entered in the memory, ie: if it is new,
the word “NEW” will appear in the display @.
With the aid of this button it is therefore
possible to avoid entering the same fre-
quency under several station numbers.
@ An example will now be given for the
combined use of the auxiliary memory
functions. A station broadcasting on a
frequency of 87.60 MHz is entered in the
memory under the station numbers 9 and 2,
in the latter case along with the abbreviation
BAY 4. If you tune to 87.60 MHz manually
and you would like to know whether this
frequency has already been entered in the
memory, press the COMP. button @. The
following information will then be shown
alternately in the displays @ and @:
reava[ 2] — [aro] 9 ]
This indicates that the station tuned to manu-
ally is Bayern 4 (4th Bavarian programme)
and that it has already been entered in the
station position 2 and also in the station
position 9.
lf you now wish to erase the data from station
position 9, select it by pressing station button
9 (group of buttons @), press the “STORE”
button @ and then the “FREE” button @.
The station position 9 will now be available
for entering another station and will be
included among the unallocated station
numbers.
11

The L.S.M Indicator ©
L.S.M. stands for “Last-Station Memory”
and the indicator can be used to ensure that
if the set is switched off, a given ora
_preferred station tuned to manually or
selected with the station selection buttons @
will automatically be tuned to again when the
unit is next switched on, even if a timer is
used. Ifthe L.S.M. indicator is lit when the set
is switched off, the tuner has noted the last
station tuned to.
@ The following points should be noted: —
The non-volatile RAM memory temporarily
records even tuning data whichis not.
entered In the memory with the “STORE”
button @. However, to allow the set to cope
with the flow of data to the memory, the
station must be tuned to for at least 30 secs.
At the end of this period the L.S.M. indicator -
@ comes on to indicate transfer is complete.
If you want a station to come back on when
you next switch on, you must therefore
remember to wait 1/2 min. until the L.S.M.
indicator @ comes on before you switch off.
Points to Note
The cabinet should only be cleaned with a
soft cloth which picks up dust. No strong.
polishes or cleaning agents should be used.
Do not expose the set to excessive heat or
humidity. |
(The German Post Office draws attention to
the fact that the combined sound and TV
reception licence only implies the right to set
up and operate sound/TV receivers. Only
transmissions by broadcast stations may be
received and no others).
Technical data
Wavebands
VHF
Medium wave (MW)
Long wave {LW)
Sensitivities
87.50 -
108 MHz
522 - 1611 kHz
155- 353 kHz
12
VHF stereo: 20. for 46 dB S/N ratio
(750, 40 kHz deviation).
MW: 9.5uV
LW: 124V
Stereo switching threshold
Stereo on/off: 3.2/2.5uV into 752. at 98 MHz
Muting threshold
2.5nV into 752) at 98 MHz
with aerial simulation
VHF mono: 0.54 for 26 dB S/N ratio
(752, 40 kHz deviation).
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FM self-seek threshold
Adjustable: min. 3uV,
max. 2mV (75)
AM self-seek threshold
Depending on FM self-seek threshold, adjustable:
MW min. 100zV, :
max. 10 mV (750)
LW min. 200zV,
max. 20 mV (752)
Intermediate Frequencies
FM: 10.7 MHz
AM: 450 kHz
FM Limiting
Limiting point: 0.46,.V into 75Q for —1dB, 0.34V into
750 for —3dB.
Bandwidth
FM - IF: approx. 130 kHz
AM - iF: approx. 4 kHz
IF Rejection Ratio
FM: = 120 dB/752
AM: = 40 dB
AM Suppression :
> 54 dB at 1 kHz; measured with 22.5 kHz deviation,
30% AM modulation and 1 mV into 75 0
Image Rejection
FM: = 120 dB
MW: = 43 dB
LW: = 63 dB
Capture Ratio
<= 1.5 dB for —1dB/ ~30dB AF !evel at AF output
for 1 mV into 75 2 and 40 kHz deviation.
FM Signal-to-noise Ratio (Unweighted) |
For 1 mV into 75 2 in the range 31.5 Hz - 15 000 Hz
at a nominal output voltage of 0.8 V, deviation
40 kHz,
Mono/stereo: = 75/74 dB rms
= 71/70 dB DIN 45 405
FM Signal-to-noise Ratio (Weighted)
For 1 mV into 75 9, with a nominal output voltage
of 0.8 V, and 40 kHz deviation
Mono/stereo: = 79/76.5 dB rms value, curve “A”
= 70.5/68 dB DIN 45 405.
FM Stereo Frequency Response
From aerial to loudspeaker output
10 Hz - 16.8 kHz for —3 dB
20 Hz- 15kHzfor —1 dB
Pilot Tone Rejection
= 63 dB for 19 kHz
=> 80 dB for 38 kHz
Distortion |
Mono: <= 0.09%, stereo = 0.15%
for 1 kHz and 40 kHz deviation,
measured to DIN 45 500 at 1 mV into 75 0
Dynamic Selectivity: Mono
> 80 dB (+ 300 kHz, for 40 kHz deviation, -30 dB
noise voltage)
2300 esate
Dynamic Selectivity
—. Mono, wanted-signal transmitter 5 #V/75 QO
--~ Stereo, wanted-signal transmitter 100 nV/75 &
(Interfering transmitter 40 kHz deviation, 1 KHZ frog, at 30 dB
unweighted signal-to-noise ratio).
FM Crosstalk
1 mV aerial voltage, 47.5 kHz total deviation
10 kHz = 47 dB
1 kHz = 48 dB
measured with narrow bandpass
AF Output >
150 mV for 7.5 kHz deviation
at the adjustable outputs if the AF level control is
in the centre lock-in position.
Level-Control Range ;
+ 5.5 dB to —13dB (0 dB 3 AF level in centre
setting)
DIN Record Level
0.87 mV/kKQ at + 40 kHz.
interference Immunity
To all European standards and IEC
recommendations.
Power consumption: 15 W max.
Due
to
our
policy
of
continuing
development
the
above
figures
are
subject
to
alteration
without
prior
notice.
13