Roberts Duet 2 User manual

Please read this manual before use
DAB/FM RDS digital radio
ROBERTS

Controls ........................................................................... 2-4
Battery operation .................................................................5
Using the AC adaptor ..........................................................6
Operating your radio - DAB .................................................7
Selecting a station - DAB.....................................................8
Secondary services - DAB...................................................8
Display modes - DAB ..........................................................9
Finding new stations - DAB ...............................................10
Signal strength display - DAB............................................10
Manual tuning - DAB .........................................................11
Dynamic range control - DAB............................................12
Operating your radio - FM .................................................13
Manual tuning - FM............................................................14
Display modes - FM...........................................................15
FM Stereo/Mono function (headphones only) ...................16
Scan sensitivity setting FM................................................17
Presetting stations.............................................................18
Recalling a preset..............................................................18
Favourite station button.....................................................19
Software version................................................................20
Contents
System reset......................................................................21
Headphone socket.............................................................22
Auxiliary input socket.........................................................23
USB socket for software upgrade......................................23
General..............................................................................24
Display backlight................................................................24
Specifications ....................................................................25
Circuit features ..................................................................25
Guarantee..........................................................................26
1

2
Controls
1. On / Off button
2. Band button
3. Favourite button
4. Info / Menu button
5. Auto Tune button
(Top)
6. Preset buttons
7. LCD display
8. Low battery indicator
1 2 3 4 5
6
8
7

3
Controls
(Right side)
9. Tuning control
10. Volume control
11. Tone control
12. Headphone socket
9
10
11
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4
Controls
(Back)
13. USB socket for software upgrades
14. Telescopic aerial
15. Auxiliary input socket
16. DC input socket
17. Battery compartment
13
14
15
16
17

Battery operation
1. Remove the battery cover on the rear of the unit by pushing the
catches in the direction shown by the arrows.
2. Insert four LR20 (D size) batteries into the spaces in the compartment.
Take care to ensure all batteries are inserted with the correct polarity as
shown inside the battery compartment. Replace the battery cover.
3. When the batteries are exhausted, the battery low indicator will show
red for a short while. The radio will then switch itself off. It may not be
possible to switch the radio back on until the batteries are replaced,
or until the radio is connected to the mains adaptor. Reduced power,
distortion and a ‘stuttering’ sound are all signs that the batteries may
need replacing.
4. If the radio is not to be used for any extended period of time it is
recommended that the batteries are removed from the radio.
We would recommend for economy that the radio is used via the AC
adaptor whenever possible with battery operation for occasional or
stand-by use only.
IMPORTANT: The batteries should not be exposed to excessive heat
such as sunshine, fire or the like.After use, disposable batteries should
if possible be taken to a suitable recycling centre. On no account
should batteries be disposed of by incineration.
1
5
1

Using the AC adaptor
1. Place your radio on a flat surface and plug the mains adaptor into the
DC input socket located on the rear of your radio (marked 'DC in')
ensuring that the plug is pushed fully into the socket.
2. Plug the other end of the mains adaptor into a standard 13A mains
socket outlet and switch on the wall socket. Whenever the adaptor is
used the batteries are automatically disconnected. If the mains adaptor
is plugged into the radio but not switched on then the radio will run
from the batteries if fitted.
The AC adaptor should be disconnected from the mains supply and
from the radio when not in use.
IMPORTANT: The mains adaptor is used as the means of connecting the
radio to the mains supply. The mains socket used for the radio must remain
accessible during normal use. In order to disconnect the radio from the
mains completely, the mains adaptor should be removed from the mains
socket outlet completely.
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7
Operating your radio - DAB
1. Carefully extend the telescopic aerial.
2. Press the On/Off button to switch on your radio the display will show
"Roberts" for a few seconds.
3. If this is the first time the radio is used a quick scan of the Band III
DAB channels will be carried out. This is known as "Auto tune". The
display will show "Now tuning". If the radio has been used before the
last used station will be selected.
4. During the scanning process, the lower line of the display shows a
bar-graph indicating progress of the scan.
5. When the Auto tune is completed the first station (in numeric-alpha
order 0...9...A....Z) will be selected. The first station in the list of stations
found will be played. The display will show the station name in the first
line of the display and other information in the second line.
6. If the station list is still empty after the Auto tune your radio will display
"No Signal".
7. If no stations are found, "Service not available" will be displayed and
it may be necessary to relocate your radio to a position giving better
reception. You should then carry out an auto tune to find stations as
described on page 10 (see Finding new stations on page 10).
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8
Selecting a station - DAB
1. The top line of the display shows the name of the station currently
selected.
2. Rotate the Tuning control to scroll through the list of available
stations.
3. Press and release the Tuning control to select the station.The display
may show "Now tuning" while your radio finds the new station.
4. Adjust the Volume and Tone controls to the required setting.
Note: If after selecting a station the display shows "Service not available"
it may be necessary to relocate your radio to a position giving better
reception.
The use of radio station presets for selecting your preferred radio
stations is described on page 18.
4
Secondary services - DAB
1. Certain radio stations have one or more secondary services associated
with them. If a station has a secondary service associated with it the
display will show ">>" next to the station name on the station list. The
secondary service will then appear immediately after the primary
service as you rotate the Tuning control.
2. Press the Tuning control to select the station.
3. When the secondary service shuts down your radio will automatically
switch back to the main radio station (or primary service) if it is
available.
2,3
4
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9
Display modes - DAB
In DAB mode the bottom line of the display can be set to any of the
following display options :-
1. Press the Info button to cycle through each of the options.
a. Scrolling text Displays scrolling text messages such
as artist/track name, phone in number,
etc.
b. Programme type Displays type of station being listened to
e.g. Pop, Classic, News, etc.
c. Multiplex Name Displays name of multiplex to which the
current station belongs.
d. Time and date Displays current time and date.
e. Channel & frequency Displays current channel number and
frequency.
f. Bit rate/audio type Displays the digital bit rate and audio
type.
g. Signal strength Displays the quality of the received DAB
signal for the current station. The clear
unfilled rectangle indicates minimum
signal level required for satisfactory
reception.
a
d
b
f
c
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e
g

10
1
Finding new stations - DAB
As time passes new stations may become available. To find new stations
proceed as follows:-
1. Press and release the Auto Tune button. The display will show
"Scanning..." and your radio will perform a scan of the Band III DAB
channels. As new radio stations are found the station counter on the
right-hand side of the display will increase and the radio stations will
be added to the list stored in the radio.
Signal strength display - DAB
1. Repeatedly press and release the Info button until the lower line of
the display shows signal strength.
2. Position your radio and try moving the aerial so as to give maximum
number of black rectangles on signal strength display. Normally, the best
reception will be found with the aerial vertical and fully extended.
3. The clear unfilled rectangle indicates minimum signal level required
for satisfactory reception.
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11
Manual Tuning - DAB
Manual tuning allows you to tune directly to the various DAB Band III
channels.
1. Press and hold the Menu button so that the display shows "Manual
tune".
2. Press and release the Tuning control.
3. Rotate the Tuning control to select the required DAB channel.
4. Press and release the Tuning control to select the required DAB
channel. The open bar in the middle shows you the minimum signal
strength needed for good DAB reception. The signal strength bars will
go up and down showing the changing signal strength as you adjust
the telescopic aerial on your radio.
5. When a DAB signal is found, the display will show the name of the
DAB multiplex. Any new radio stations found will be added to the list
stored in the radio.
6. Press and release the Tuning control to return to normal tuning.
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12
Dynamic Range Control (DRC) settings - DAB
Dynamic range control (also known as DRC) can make quieter sounds
easier to hear when your radio is used in a noisy environment.
1. Press the On/Off button to switch on your radio.
2. Press and hold the Menu button the display will show “Manual
tune.”
3. Rotate the Tuning control until the display shows "DAB DRC".
4. Press and release the Tuning control to enter adjustment mode.
5. Rotate the Tuning control to select required DRC setting
(default is 0).
DRC 0 DRC is switched off, Broadcast DRC will be ignored.
DRC 1/2 DRC level is set to 1/2 that sent by broadcaster.
DRC 1 DRC is set as sent by broadcaster.
6. Press and release the Tuning control to confirm the setting. The
chosen setting will be marked with an asterisk. The display will return
to normal tuning mode.
Note: Not all DAB broadcasts use the DRC function. If the broadcast
does not provide DRC information, then the DRC setting in the radio will
have no effect.
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13
Operating your radio - FM
1. Carefully extend the telescopic aerial.
2. Press the On/Off button to switch on your radio.
3. Press the Band button to select the FM band.
4. Press and release the Auto Tune button.Your radio will scan in
an upwards direction (low frequency to high frequency) and stop
automatically when it finds a station of sufficient strength.
5. After a few seconds the display will update the display will show the
frequency of the signal found. If the signal is strong enough and there
is RDS data present then the radio will display the station name.
6. Press and hold the Auto Tune button for 2 seconds to scan the FM
band in a downwards direction (high frequency to low frequency).
7. When the waveband end is reached your radio will recommence tuning
from the opposite waveband end.
8. Adjust the Volume and Tone controls to the required setting.
9. To switch off your radio press the On/Off button.
The use of radio station presets for selecting your preferred radio
stations is described on page 18.
2,9
3
4,6
8
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14
Manual tuning - FM
1. Press the On/Off button to switch on your radio.
2. Press the Band button to select the FM band. Carefully extend the
Telescopic aerial fully for FM reception.
3. Rotate the Tuning control to tune to a station. The frequency will
change in steps of 50kHz.
4. When the waveband end is reached the radio will recommence tuning
from the opposite waveband end.
5. Adjust the Volume and Tone controls to the required setting.
6. To switch off your radio press the On/Off button.
1,6
2
3
5
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15
Display modes - FM
In FM mode the bottom line of the display can be set to any of the following
display options :-
1. Press the Info button to cycle through each of the options.
a. Scrolling text Displays scrolling text messages such
as artist/track name, phone in number
etc.
b. Program Type Displays type of station being listened to
e.g. Pop, Classic, News, etc.
c. Time and date Displays current time and date.
d. Frequency Displays frequency of the station being
listened to.
e. Audio mode Displays the audio mode, Auto (stereo) or
mono.
Note: Your radio will display "No RadioText" on the lower line of the display
if there is no scrolling text available and "No PTY" if there is no programme
type information.
a
b
c
d
1
e

16
1,2
FM Stereo/Mono (headphones only)
1. If a station being received is weak some hiss may be audible. To reduce
this, press and release the Tuning control so that the display shows
"Switch to Mono". Your radio will switch to mono mode.
2. To return to stereo mode press and release the Tuning control so
that the display shows "Switch to Auto". Your radio will switch to stereo
mode.

Scan sensitivity setting - FM
Your radio will normally scan for FM broadcasts which are strong enough
to give good reception. However, you may wish the Auto-scan function
to also be able to find weaker signals, possibly from more distant radio
transmitters. Your radio includes a local / distant option for the Auto-scan
function.
1. Press the On/Off button to switch on your radio.
2. If needed, press the Band button to select the FM band.
3. Press and hold the Menu button until the display shows "FM Scan
Zone" then press the Tuning control to enter the scan zone selection
menu.
4. Rotate the Tuning control to switch between Local and Distant options
on the lower line of the display. The Distant option will allow the radio
to find weaker signals when scanning.
5. Press and release the Tuning control to confirm your selection. The
radio will then revert to the normal information display. The Local or
Distant setting is stored in the radio and remains in force until changed
or until a System Reset.
Note: The initial setting (out of the box, or after a System Reset) causes
the radio to ignore weaker (or more distant) signals.
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18
Presetting stations
There are 5 memory presets for each of the two wavebands which
allow you to quickly tune the radio to your favourite stations. Presets are
stored in a memory which remembers the settings even when the radio
is switched off.
1. Press the On/Off button to switch on your radio.
2. Tune to the required station as previously described.
3. Press and hold the required Preset button until the display shows
e.g. "Preset 1 stored". The preset number will appear in the top right
hand corner of the display. The station will be stored under the chosen
preset button. Repeat this procedure for the remaining presets.
4. Stations stored in the memories may be overwritten by following the
above procedure.
Recalling a preset
1. Press the On/Off button to switch on your radio.
2. Select the required waveband.
3. Momentarily press the required Preset button, your radio will tune to
the station stored in preset memory.
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19
Favourite station button
Your radio has a Favourite Station button which can automatically select
the required waveband and tune to your favourite station. This button can
store one favourite station from either the FM or DAB waveband.
1. To set up your favourite station, tune into the required station.
2. Press and hold down the Favourite button (3-4 sec) until the display
shows "My Fav. Saved".
Recalling your favourite station
1. Press the On/Off button to switch on the radio.
2. Momentarily press the Favourite button, your radio will tune to the
station stored in favourite memory.
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