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Summary of Contents for Roberts Gemini 21 RD-21
- Page 1 RD-21 FM RDS/DAB digital radio Please read this manual before use...
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Page 2: Table Of Contents
Contents Controls ...2 Battery operation ...3 Mains operation ...3 Operating your radio - DAB ...4 Selecting a station - DAB ...5 Secondary services - DAB ...6 Display modes - DAB ... 7-8 Finding new stations - DAB ...9 Signal strength display - DAB ...9 Manual tuning - DAB ...10... -
Page 3: Controls
Controls (Top) 1. Telescopic aerial (on rear) 2. On/Off button 3. Mains LED indicator 4. Treble control 5. Liquid crystal display (LCD) 6. + 5 button If you need any further advice, please call our Technical Helpline on :- 020 8758 0338 (Mon-Fri) 7. -
Page 4: Battery Operation
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. -
Page 5: Operating Your Radio - Dab
2. Press the On/Off button to switch on your radio. The display will show "Welcome to DAB" for a few seconds. 3. If this is the first time the radio is used a quick scan of the UK band III DAB channels will be carried out. -
Page 6: Selecting A Station - Dab
"Now Tuning" while your radio finds the new station. 4. Adjust the Volume and Tone controls to the required settings. Note: If after selecting a station the display shows "Station not available" it may be necessary to relocate your radio to a position giving better reception. -
Page 7: Secondary Services - Dab
2. To tune to the secondary service, press and release the Select button. Most secondary services do not broadcast continually and if the selected service is not available, the radio will retune to the associated primary service. If you need any further advice, please call our Technical Helpline on :-... -
Page 8: Display Modes - Dab
Display modes - DAB Your radio has seven display modes:- 1. Press the Info/Menu 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 the type of station being listened to e.g. - Page 9 e. Frequency Displays the frequency of the DAB multiplex for the station listened to. Bit rate & audio type Displays the digital bit rate & audio type for the station being listened to. g. Signal Error Displays the signal error for the station being listend to.
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Page 10: Finding New Stations - Dab
1. Press and release the AutoTune button, the display will show "Scan- ning". 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. -
Page 11: Manual Tuning - Dab
DAB reception. The signal blocks will go up and down showing the changing signal strength as you adjust the telescopic aerial or the radio position. 4. Press and release the Select button to return to normal tuning mode. -
Page 12: Dynamic Range Control (Drc) Settings - Dab
Dynamic Range Control (DRC) settings - DAB The DRC facility 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 down the Info/Menu button and rotate the Tuning control or press the Up or Down buttons until the display shows "DRC value". -
Page 13: Station Order Setup - Dab
Alphanumeric Rotate the Tuning control until "Alphanumeric" appears on the display. Your radio will now select stations in alphanumeric order (0...9...A...Z). If you need any further advice, please call our Technical Helpline on :- 020 8758 0338 (Mon-Fri) -
Page 14: Prune Stations
Some DAB services may stop broadcasting or you may not be able to receive a station. Prune stations will delete the DAB stations from your station list that can no longer be received. When this feature is selected your radio will delete the stations that are not currently being received. -
Page 15: Operating Your Radio - Fm
Operating your radio - FM 1. Carefully extend the telescopic aerial 2. Press the On/Off button to switch on your radio. The radio will tune to the last selected radio station. 3. Press the FM/DAB button to select the FM band. -
Page 16: Manual Tuning - Fm
3. Rotate the Tuning control or press the Up or Down buttons to tune to a station. The frequency will change in steps of 50kHz. 4. When the end of the waveband is reached the radio will recommence tuning from the opposite end of the waveband. -
Page 17: Display Modes - Fm
FM Stereo/Mono 1. If the FM radio station being received is weak some hiss may be audible. To reduce the hiss press and release in the Select button until the display shows "Mono", your radio will switch to mono mode. -
Page 18: Presetting Stations - Dab And Fm
Presetting stations - DAB and FM There are 10 memory presets for each of the 2 wavebands. 1. Press the On/Off button switch on the radio. 2. Tune to the required station as previously described. 3. Press and hold down the required Preset button until the display shows e.g. -
Page 19: Recalling A Preset Station - Dab And Fm
1. Press the On/Off button to switch on the radio. 2. Select the required waveband by pressing the FM/DAB button. 3. Momentarily press the required Preset button, your radio will tune to the station stored in preset memory. 4. Presets 6 to 10 are obtained by pressing and holding +5 button and Preset button 1 to 5. -
Page 20: System Reset
System reset If your radio fails to operate correctly, or some digits on the display are missing or incomplete, if running on batteries first check that the batteries are not exhausted. If you still suspect a problem with your radio please carry out the following procedure. -
Page 21: Headphone Socket
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. -
Page 22: Software Version
Software version The software display cannot be altered and is just for your reference. 1. To view which software version your radio has press and hold in the Info/Menu button. 2. Rotate the Tuning control or the Up and Down buttons until the... -
Page 23: General
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. -
Page 24: Specifications
Specifications Power Requirements Mains AC 230 volts, 50Hz Batteries 6 x LR20 (D size) Battery Life Up to 150 hours of listening for 4 hours a day at normal volume using alkaline cells. Frequency Coverage 87.5-108MHz 174.928 - 239.200MHz Circuit Features only Loudspeaker Output Power... -
Page 25: Mains Supply
When replacing the fuse only a 3A ASTA approved to BS1362 type should be used and be sure to re-fit the fuse cover. IF IN DOUBT - CONSULT A QUALIFIED ELECTRICIAN. Replacement fuse holders are available from Roberts Radio Technical Services at the address shown on the rear of this manual. -
Page 26: Notes
Notes... -
Page 27: Guarantee
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. - Page 28 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...
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Questions and answers
I have had a Roberts Radio Gemini 21 (RD21), and it has stopped. I need a circuit diagram to enable me to find the problem. Hoping you can help me.
The manual lists "Circuit features" on page 23, but it does not mention a circuit diagram. There is no indication that a circuit diagram is included in the provided information.
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Does the Roberts radio Gemini 21 (RD21) have a remote control? if not can you use any remote control?
Red light only blank screen