Arcam Delta 280 User Manual

ARCAM

DELTA 280 TUNER

HANDBOOK

Technical specification

FM tuning range
Tuning system
Frequency step
Presets
Sensitivity (HF)
Alternate channel selectivity
AM suppression ratio
Capture ratio
Signal Strength meter

sensitivity

Frequency response

87.5 to 108.0MHz
Phase-locked-loop
50kHz

20

typically 1.4uV
better than 60dB
better than 50dB
typically 1.5dB
4 segment LED
typically 2uV to 2mV
20Hz-12kHz +/-0.5dB
typically -2dB at 15kHz

Ultimate S/N ratio (CCIR) Mono

Stereo

better than 75dB
better than 72dB

Total harmonic distortion 96MHz reference, 22.5kHz deviation at IkHz

Mono better than 0.10%
Stereo better than 0.30% (using MPX filter)

Chatmel separation (IkHz)
Pilot tone suppression
Output impedance
Minimum recommended load

Output level
Power consumption
Size W/D/H mm.
Weight

better than 40dB
better than 50dB
25ohm

Ikohm

850mV at 75kHz deviation

12VA

430 X 230 X 84

2.2kg nett.

3.2kg packed.

Supphed accessories

E & O E.

FM dipole aerial
co-ax plug adaptor
mains lead

CR25 Handi-Remote control

F-Type aerial adaptor

® IF FUNCTION - When several radio

stations are situated close together on the
FM frequency band, a station with a
strong signal can interfere with a weak
adjacent station. In order to receive the
weaker station properly, a modified IF
(Intermediate Frequency) filter is
required. The IF function switches in a
narrow bandwidth filter, allowing the
Delta 280 to receive the weaker station's
signal satisfactorily.
To select the IF function, press the IF
button. The IF LED ■will glow green.
To cancel, press the IF button again.

® AUTO - Selects automatic or manual

tuning (see below). The led ■will glow

amber when AUTO is selected. If the

led is not ht manual tuning is selected.

®,® V A - Press to tune up or down through

the FM frequency band. In AUTO
tuning mode the frequency display will
stop automatically at a station ■with a
suitably strong signal. In manual tuiung
mode press and hold v or

a until the

desired frequency is displayed.

O DISPLAY - The FM frequency display,

signal strength meter and AUTO LED

can be turned off by pressing DISPLAY.

To restore the display, press DISPLAY

again.

Please Note: The two digit preset

number display and the other LEDs are
not affected by the DISPLAY function.

® STOIkE - For storing up to 20 FM

stations into the preset memory. To
preset stations press STOB,E and while
the led glo^ws red, press the desired
preset button.

® SHIFT - The Delta 280 has two banks of

ten presets. Choose the required bank

by pressing the SHIFT button. Presets

1-10 can be selected when the SHIFT

led is off and presets 11-20 when the led

Note: After pressing SHIFT to change
the preset bank it ■wiU still be necessary
to press the required preset button to
change charmel.

0 SCAN - Plays approximately 5 seconds

of each of the 20 presets in turn. If you

■wish to continue Hstening to one of the
scaimed stations, press the relevant preset
button.
Pressing either STORE, a (tune up) or

V (tune down) ■wUl cancel the SCAN

function.

® PRESET BUTTONS - Once all the

stations have been preset into the
memory, simply press the relevant
button to select the desired stations.
Use SHIFT when selecting preset
stations 11-20.

0 POWER - Switches the unit on and off.

® PILESET DISPLAY - Displays the

preset number of the selected station.

0 SIGNAL STRENGTH METER -

Indicates signal strength of the selected
station. As several radio stations are
available on more than one frequency,
use the signal strength meter to help you
locate the best position for each station.
As a guide, two amber leds and two
green leds ■wiH give adequate stereo
reception. AU eight leds ■wiU give the
best stereo reception ■with the least
possible background noise. In most
cases, you wiU need to use a roof
mounted aerial cormected to the mner

■with a good quahty low loss 75ohm co
axial cable to achieve the best results.
The simple wire dipole aerial pro^vided is

only suitable for reception of strong local

stations.

INSTALLATION

AUDIO CONNECTIONS

© Check that your mains supply voltage

agrees with the voltage setting on the
rear panel of the unit.

■ If your mains supply voltage is different,
consult your Arcam dealer.

MAINS SAFETY

■ This product is normally supphed with a
moulded mains plug already fitted to the
lead. If for any reason the plug needs to
be removed, it must be disposed of
immediately and securely, as it is a
potential shock hazard when inserted
into a mains socket.

■ If the plug is removed then the
remaining lead must be rewired as
follows:

■ The blue wire must be connected to the
terminal which is coloured blue or
marked with the letter N.

■ The brown wire must be connected to
the terminal which is coloured brown

or marked with the letter L.

■ The green and yellow wire must be

connected to the temiinal which is
coloured green and yellow, or marked

with the letter E or the safety earth

symbol.

® AUDIO OUTPUTS - Both pairs of

outputs are identical. Connect one pair
of them to your amplifier's TUNER
input using a suitable interconnect cable.
The other pair can be connected to a hi
fi VCR's audio input for recording
simultaneous broadcasts (simulcasts) or to
a cassette deck for direct recording.
Insert the red phono plugs into the
sockets labelled 'R' and the other phono
plugs into the sockets labelled 'L'.

AERIAL CONNECTIONS

® AERIAL SOCKETS - Connect your

aerial downlead using the supphed
adaptor if necessary. Two aerial sockets
are provided, enabhng you to use two
separate aerial sources eg. for terrestrial
FM broadcasts and Cable radio.

■ With the aerial selector switch 'IN' only
the Aerial One input will be used for ah
20 presets.

® With the aerial selector switch 'OUT',

Aerial One will be used when preset 1-

10 are selected and Aerial Two when

presets 11-20 are selected.

■ When replacing the fuse in the supphed
moulded mains plug, the integral fuse
holder/cover must always be refitted.

Warning:

This apparatus must be

earthed.

MAINS SUPPLY CONNECTIONS

@ Insert the lEC fine socket of the mains

lead fuUy into the power inlet on the rear
panel. Connect the other end to your
mains supply.

OPERATION

® MONO - Selects mono or stereo

output. The led (hght emitting diode)
wih glow red when mono is selected. If
a weak station is received in stereo the
background hiss can be reduced by
selecting mono.

SAFETY STANDARD

® STEREO LED - Indicates stereo

reception. When tuning through the
FM frequency band in stereo (auto or
manual) inter-station noise and very
weak signals are automatically muted.
To cancel muting, select mono output

(see © MONO).

@ FM FREQUENCY DISPLAY -

Indicates the frequency of the selected
FM station.

■ PRESET MEMORY BACK-UP - The
preset memory will be retained while
the tuner is connected to the mains. If
the mains supply is disconnected, the
memory will be retained for
approximately one week.

■ REMOTE CONTROL FUNCTION

- The Delta 280 tuner has been designed
to work with both the Arcam System
Remote and 'Handi-Remote' handsets.

The System Remote accesses aU
functions except automatic mning. The
'Handi-Remote' can select presets, turn
the display off and control Mono or

Stereo mode.

RADIO INTERFERENCE

■ The Delta 280 tuner is a digital device
which has been designed to very high
standards of electromagnetic
compatibUity.

■ This product has been designed to meet
the lEC 65 international electrical safety
standard.

FOR YOUR INFORMATION

The BBC pubHshes a booklet entided "Radio
Transmitting Stations" which contains details

of all BBC transmitters in the UK together

with other usefiil hints and tips.

This booklet can be obtained on request by
sending a large stamped addressed envelope
to:-

BBC Engineering Information,
White City,
201 Wood Lane,
London,
W12 7TS.

Tel: [phone] aocal caU rate)

The Radio Authority pubhshes a booklet
which contains details of all independent radio
stations. This booklet can be obtained on
request by sending a large stamped addressed

envelope to:-

Radio Authority,

Holbrook House,

14 Great Queen Street,
London,
WC2B 5DG.

Telephone: [phone]

■ EC COUNTRIES: This product has
been designed to comply with directive

89/336/EEC.

■ USA: This product comphes with FCC
requirements. Please refer to the Hints

and Tips booklet if you suspect a radio

interference problem.

ARCAM

Pembroke Avenue, Waterbeach,

Cambridge CBS 9PB. England.

Telephone: [phone]

Fax: [phone]

Issue 395/1

SH050