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Roberts Gemini 31, Manual, Page: 24 / 28

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23

Specifications

Power Requirements 

 

Mains 

  

 

AC 230 volts, 50Hz 

 only

Batteries   

 

6 x LR20 (D size) 

Battery Life

 

 

 

Up to 100 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

Circuit Features

Loudspeaker 

 

2 x 79mm

Output Power 

 

3W

Headphone socket   

3.5mm dia

Line out socket 

 

3.5mm dia

Aerial System 

 

FM 

Telescopic aerial

 

 

 

DAB 

Telescopic aerial

 

 

Summary of Contents for Gemini 31

Page 1: ...RD 31 Please read this manual before use ROBERTSSound for Generations FM RDS DAB digital radio ...

Page 2: ...ausePlus feature DAB 11 Dynamic range control DRC settings DAB 12 Station order setup DAB 13 14 Operating your radio FM 15 Manual tuning FM 16 Display modes FM 17 FM stereo mono 17 Contents Presetting stations DAB and FM 18 Recalling a preset station DAB and FM 19 System reset 20 Headphone socket 21 Line out socket 21 Display backlight 21 Software version 22 General 22 Specifications 23 Circuit fea...

Page 3: ...LED indicator 4 Treble control 5 Liquid crystal display LCD 6 PausePlus button Top 1 13 Tuning Up button 14 Tuning Down button 15 Tuning control 16 Station presets 17 Bass control 18 Volume control 7 Auto Tune button 8 Headphone socket 9 FM DAB button 10 Line out socket 11 Info button 12 Select Real Time button 2 3 4 6 9 11 12 13 18 17 16 5 7 14 15 8 10 ...

Page 4: ...he batteries should not be exposed to excessive heat suchassunshine fireorthelike Afteruse disposablebatteriesshould if possible be taken to a suitable recycling centre On no account should batteries be disposed of by incineration Mains operation 1 Place your radio on a flat surface 2 Plug the mains lead into the Socket located on the rear of your radio ensuring that the plug is pushed fully into th...

Page 5: ...ick scan of the UK band III DAB channels will be carried out 4 During Autotune as each group of stations is detected the bottom line of the display will show a bargraph indicating progress of the Autotune 5 When theAutotune is complete 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 you radio will display No stations availabl...

Page 6: ... the list of available stations 3 Press and release the Select button 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 settings Note Ifafterselectingastationthedisplayshows Stationnotavailable it may be necessary to relocate your radio to a position giving better reception 4 3 2 2 2 4 4 ...

Page 7: ...ry 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 Totunetothesecondaryservice pressandrelease the Selectbutton Mostsecondaryservicesdonotbroadcastcontinuallyandiftheselected service is not available the radio will retune to the associated pr...

Page 8: ...such as artist track name phone in number etc b Program Type Displays the type of station being listened to e g Pop Classic News etc c Multiplex Name Displays the name of DAB multiplex to which the current station belongs d Signal strength Displays signal strength for the station being listened to e Time and date Displays current the time and date a b c e 1 7 d ...

Page 9: ... frequency of the DAB multiplex for the station listened to g Bit rate audio type Displays the digital bit rate audio type for the station being listened to h Signal Error Displays the signal error for the station being listend to i Maximum delay Displays the maximum PausePlus delay time for the station being listened to i ...

Page 10: ...re 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 1 2 1 Signal strength display DAB 1 Press and release the Select button to switch between the current information display and the signal strength indication 2 Position your radio and carefully angl...

Page 11: ...tons until the display shows Manual Tune Press and release the Select button 2 Rotate the Tuning control or press the Up or Down buttons to select the required DAB channel 3 Press and release the Select button The open block in the signal strength graph shows you the minimum signal strength needed for good DAB reception The signal blocks will go up and down showing the changing signal strength as ...

Page 12: ...he feature only operates on the DAB waveband 1 To place your radio in mode simply press the button the sound from the loudspeaker will be muted The display will show a shortened version of the station name and a pause symbol The top right of the display will show the amount by which the programme has been paused 2 To return to the radio station that you were listening to simply press the button an...

Page 13: ...shows DRC value Press and release the Select button to enter adjustment mode 3 Rotate the Tuning control or press the Up or Down buttons to select the 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 4 PressandreleasetheSelectbuttontoconfirmthesetting Thedisplay ...

Page 14: ... Press and release the Select button 3 Rotate the Tuning control or press the Up or Down buttons to choose between favourite station alphanumeric active station and prune stations 4 Press and release the Select button to select the station order setting required Favourite stations When this setting is switched on after a period of time the most listened to stations will move to the top of the stat...

Page 15: ...ill show only those that a signal can be found for 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 14 ...

Page 16: ...nformation is being received then after a few seconds the display will update and show the radio station name 6 To find other stations press the Auto Tune button as before 7 If you press and release the Down button then press the Auto Tune button yourradiowillsearchinadownwardsdirection highfrequency to low frequency and stop automatically when it finds a station of sufficient strength 8 When the end...

Page 17: ...M band Fully extend the Telescopic aerial 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 5 Set the Volume control and Tone controls to the desired settings 6 To switch off your radio press the On Off button 2 ...

Page 18: ...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 FM Stereo Mono 1 IftheFMradiostationbeingreceivedisweaksomehissmaybeaudible To reduce the hiss press and release in the Select button until the display shows Mono your radio will switch to mono mode 2 To return to stereo mode press and re...

Page 19: ...Press the On Off button to 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 showse g Preset1saved The stationwillbestoredunderthechosen preset button Repeat this procedure for the remaining presets 4 Stations stored in preset memories may be overwritten by following the above procedure 3 1 ...

Page 20: ...AB 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 3 1 2 ...

Page 21: ...Info button and rotate the Tuning control or press the Up or Down buttons until the display shows Select Factory reset 3 Press and release the Select button until the display shows Press SELECT to confirm reset 4 Press Select button again to confirm system reset 5 A full reset will be performed all presets and station lists will be erased 6 After a system reset a scan of the DAB band will be perform...

Page 22: ...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 your radio is powered by batteries the display backlight will be switched on for approximately 8 seconds when any button is pressed 2 When your radio...

Page 23: ...s recommended to operate the product such that there is a minimum distance 10cm recommended to adjacent objects in order to ensure good ventilation The ventilation of the product should not be restricted by covering it or its ventilation openings with items such as newspapers table cloths curtains etc No naked flame sources such as lighted candles should be placed on the product It is recommended t...

Page 24: ...Up to 100 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 Circuit Features Loudspeaker 2 x 79mm Output Power 3W Headphone socket 3 5mm dia Line out socket 3 5mm dia Aerial System FM Telescopic aerial DAB Telescopic aerial ...

Page 25: ... mains plug is cut off remove the fuse and dispose of the plug immediately to avoid a possible shock hazard by inadvertent connection to the mains supply If this product is not supplied with a mains plug or one has to be fitted then follow the instructions given below IMPORTANT DO NOT make any connection to the larger terminal which is marked with the letter E or by the safety earth symbol or colou...

Page 26: ...Notes 25 ...

Page 27: ...sequential 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 wil...

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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