Roberts Rambler RD-76 User manual

FM RDS/DAB digital radio
Please read this manual before use
ROBERTS
Sound for Generations
RD-76

Controls ........................................................................... 2-3
Battery operation .................................................................4
Using the AC adaptor ..........................................................4
Operating your radio - DAB .................................................5
Selecting a station - DAB ....................................................6
Secondary services - DAB ..................................................6
Display modes - DAB ..........................................................7
Finding new stations - DAB .................................................8
Signal strength display - DAB..............................................8
Manual tuning - DAB ...........................................................9
Dynamic range control - DAB............................................10
Operating your radio - FM .................................................11
Manual tuning - FM ...........................................................12
Display modes - FM...........................................................13
FM stereo/mono ................................................................13
Software version................................................................14
Favourite button ................................................................14
Recalling your favourite station .........................................14
System reset .....................................................................15
Headphone socket ............................................................16
Line out socket ..................................................................16
Contents
Display backlight ...............................................................16
General..............................................................................17
Specifications ....................................................................17
Circuit features ..................................................................17
Guarantee .........................................................................18
1

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 2
Controls
1. Volume control
2. On/off button
3. On/Off indicator
4. FM/DAB button
5. Auto Tune button
6. Menu button
(Top)
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24679
10
7. Info button
8. Favourite button
9. Telescopic aerial
10. Tuning/Select control
11. LCD display
5
11
38

3
Controls
10. Headphone socket
11. Line output socket
10 11 12
12. Battery compartment
13. DC jack socket
13
(Back)

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 4
Battery operation
1. Remove the battery cover on the base of the unit by sliding the cover
in the direction of the arrow.
2. Insert six LR14 (C 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. 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 RD-76 is used via the
AC adaptor whenever possible with battery operation for occasional
or stand-by use only.
Using the AC adaptor
The AC adaptor for use with the RD76 should provide 6 volts DC
output at 800mA centre pin negative.
1. Insert the adaptor plug into the DC in socket on the rear of your ra-
dio.
2. Plug the adaptor into a standard 13A mains socket outlet. Whenever
the adaptor is used the batteries are automatically disconnected.
The AC adaptor should be disconnected from the mains supply and
the radio when not in use.
1

5
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 digital radio" for a few seconds and the On/Off indicator will
light.
3. If this is the first time the radio is used a quick scan of UK Band III DAB
channels will be carried out. The display will show "Now tuning". If the
radio has been used before the last used station will be selected.
4. During Autotune, the display will show "Scanning" and as each group
of stations is detected the station count will be updated. The bottom
line of the display shows a bargraph indicating progress of the Auto-
tune.
5. When the Autotune is completed the first station (in numeric-alpha
order 0...9...A....Z) will be selected.
6. If the station list is still empty after the Autotune your radio will display
"Station not available".
7. If no signals are found it may be necessary to relocate your radio to
a position giving better reception.
2

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 6
Selecting a station - DAB
1. The top line of the display shows the name of the station currently
selected.
2. Rotate the Tuning/Select control to scroll through the list of avail-
able stations. Stop rotating the Tuning/Select control when you find
the station that you wish to hear.
3. Press and release the Tuning/Select control to select the station.
The display may show "Now tuning" while your radio finds the new
station.
4. Adjust the Volume control to the required setting.
Note: If after selecting a station the display shows "Station not avail-
able" it may be necessary to relocate your radio to a position giving
better reception.
2,3
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 clockwise.
2. Press the Tuning/Select control to select the station.

7
Display modes - DAB
Your radio has seven display modes:-
1. Press the Info button to cycle through the various modes.
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
current station belongs.
d. Time and date Displays current time and date.
e. Channel and frequency Displays current channel and frequency.
f. Audio type and bit rate Displays audio type and bit rate.
g. Signal strength Displays signal strength for station being
listened to.
a
b
d
e
1
c
f
g

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 8
1
2
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". Your radio will perform a scan of the UK DAB frequencies.
As new stations are found the station counter on the right-hand side of
the display will increase and stations will be added to the list.
2. To carry out a full scan of the entire DAB Band III frequencies press
and hold down the Auto Tune button for more than 2 seconds and
then release. The display will show "Scanning". As new stations are
found the station counter on the right-hand side of the display will
increase and stations will be added to the list.
Signal strength display - DAB
1. Repeatedly press the Info button until the display will show signal
strength.
2. Position your radio and carefully angle the telescopic aerial for best
reception using the signal strength display as a guide. Move your
radio around and position so as to give maximum number of black
rectangles on signal strength display. The clear unfilled rectangle
indicates minimum signal level required for satisfactory reception.
3. Press the Info button to exit the signal strength display.
1,3

9
Manual Tuning - DAB
Manual tuning allows you to tune directly to the various DAB Band III
channels. UK DAB stations located in the range 11B to 12D.
1. Press and release the Menu button until the display shows "Manual
tune".
2. Press and release the Tuning/Select control.
3. Rotate the Tuning/Select control to find the required DAB
channel.
4. Press and release the Tuning/Select control to select the required
DAB channel.
5. Use the signal level display to assist you in positioning your radio for
best reception. Move the radio/aerial around until the filled blocks
move past the empty block. When you are receiving a good signal
the display will show the multiplex name and add stations within the
multiplex to the station list.
6. Press and release the Tuning/Select control to return to normal
tuning mode.
1
2,3
4
6

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 10
1
Dynamic Range Control (DRC) settings - DAB
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 release the Menu button the display will show “Manual
tune.”
3. Rotate the Tuning/Select control until the display shows "DRC
value".
4. Press and release the Tuning/Select control to enter adjustment
mode.
5. Rotate the Tuning/Select 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/Select control to confirm the setting.
The display will return to radio mode.
3,4
2
5,6

11
Operating your radio - FM
1. Carefully extend the telescopic aerial.
2. Press the On/Off button to switch on your radio. The display will show
"Roberts digital radio" for a few seconds.
3. Press the FM/DAB button to select the FM band.
4. Rotate the Tuning/Select control clockwise then press and immedi-
ately 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 and show station name.
6. To find other stations press and release the Auto Tune button as
before.
7. To scan the FM band in a downwards direction (high frequency to
low frequency) rotate the Tuning/Select control anti-clockwise then
press and release the Auto Tune button.
8. When the waveband end is reached your radio will recommence tuning
from the opposite waveband end.
9. Adjust the Volume control to the required setting.
10. To switch off your radio press the On/Off button.
2
3
4,6
910
7
4,7

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 12
Manual tuning - FM
1. Press the On/Off button to switch on your radio.
2. Press the FM/DAB button to select the FM band. Fully extend the
Telescopic aerial.
3. Rotate the Tuning/Select 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. Set the Volume control to the required setting.
6. To switch off your radio press the On/Off button.
1
2
56
3

13
Display modes - FM
On FM the bottom line of the display can be set to any of the following
modes:-
1. Press the Info button to cycle through the various modes.
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
audio mode listened to and displays the audio mode,
Auto (stereo) or mono
a
b
c
d
1
FM Stereo/Mono
1. If a station being received is weak some hiss may be audible. To reduce
the hiss press and hold in the Tuning/Select control until the display
shows "Mono". Your radio will switch to mono mode.
2. To return to stereo mode press and hold in the Tuning/Select
control until the display shows "Auto". Your radio will switch to
stereo mode.
Note: FM stereo is only available when listening via earphone/head-
phones
1,2

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 14
Favourite button
Your radio is fitted with a button which when pressed will automatically
select the required waveband and tune to your Favourite station. This
will allow you to store a total of one station from either the FM or DAB
waveband.
1. To setup your favourite station, tune into the required station.
2. Press and hold down the Favourite button (10 sec) until the display
shows "Favourite stored".
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.
2
2
Software version
The software display cannot be altered and is just for your reference.
1. Ensure the DAB waveband is selected. To view the software version
on the display press and release the Menu button the display will
show “Manual tune.”
2. Rotate the Tuning/Select control until the software version appears
on the display.
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2

15
System reset
If your radio fails to operate correctly, or some digits on the display are
missing or incomplete carry out the following procedure.
1. Press and hold down the Menu button for 2 seconds "Press SELECT
to confirm reset..." will be displayed.
2. Press the Tuning/Select button, the display will show "Roberts digital
radio" and a progress bar.
3. A full reset will be performed. All presets and station lists will be
erased.
4. After a system reset a scan of the DAB band will be performed.
In case of malfunction due to electrostatic discharge, reset the product
(reconnection of power source may be required) to resume normal
operation.
If a problem persists our technical staff would be pleased to of-
fer any assistance on operating the radio. Our technical helpline
number is 020 8758 0338.
1
2

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 16
Headphone socket
A 3.5mm Headphone Socket located on the rear of your radio is provided
for use with either headphones or an earpiece. Inserting a plug automati-
cally mutes the internal loudspeaker.
Line out socket
A 3.5mm Line out socket located on the rear of your radio is provided
for connecting the audio signal to an external amplifier. Inserting a line out
audio cable will not mute the internal loudspeaker. Set the volume control
to minimum if desired.
Display backlight
1. When using on batteries, the display backlight will be switched on for
approximately 12 seconds when any button is pressed.
2. When your radio is powered by AC mains the display backlight will
always be switched on.

17
Circuit Features
Loudspeaker 76mm
Output Power 1.0 Watt
Headphone socket 3.5mm dia
Line out socket 3.5mm dia
Aerial System FM Telescopic aerial
DAB Telescopic aerial
Specifications
Power Requirements
Mains AC 230 volts, 50Hz only (adaptor)
Batteries 6 x LR14 (C size)
Battery Life
Approx. 50 hours of listening for 4 hours a day
at normal volume using alkaline cells.
Frequency Coverage
FM 87.5-108MHz
DAB 174.928 - 239.200MHz
General
Do not allow this radio to be exposed to water, steam or sand. Do not leave
your radio where excessive heat could cause damage such as in a parked
car where the heat from the sun can build up even though the outside
temperature may not seem too high. It is recommended that the DAB band
be used wherever possible as better results in terms of quality and freedom
from interference will usually be obtained than on the FM band.
The name plate is located on the underside of your radio.
The Company reserves the right to amend the specification without notice

If you need any further advice, please call our Technical Helpline on :-
020 8758 0338 (Mon-Fri) 18
Guarantee
This instrument is guaranteed for twelve months from the date of delivery to the original owner against failure due to faulty workmanship or component
breakdown, subject to the procedure stated below. Should any component or part fail during this guarantee period it will be repaired or replaced free
of charge.
The guarantee does not cover:
1. Damage resulting from incorrect use.
2. Consequential damage.
3. Receivers with removed or defaced serial numbers.
N.B. Damaged or broken telescopic aerials will not be replaced under guarantee.
Procedure:
Any claim under this guarantee should be made through the dealer from whom the instrument was purchased. It is likely that your Roberts' dealer
will be able to attend to any defect quickly and efficiently but should it be necessary the dealer will return the instrument to the Company’s service
department for attention. In the event that it is not possible to return the instrument to the Roberts' dealer from whom it was purchased, please contact
Roberts Radio Technical Services at the address shown on the rear of this manual.
These statements do not affect the statutory rights of a consumer.

ROBERTS RADIO TECHNICAL SERVICES
97-99 Worton Road
Isleworth Middlesex
TW7 6EG
Technical Helpline :- 020 8758 0338 (Mon-Fri during office hours)
Website: http://www.robertsradio.co.uk
Issue 1