User manual ARCAM DT81

[. . . ] HANDBOOK D T8 1 Arcam DT81 digital radio tuner Safety guidelines Safety instructions This product is designed and manufactured to meet strict quality and safety standards. However, you should be aware of the following installation and operation precautions: 9. Power sources Only connect the appliance to a power supply of the type described in the operating instructions or as marked on the appliance. 1. Take heed of warnings and instructions You should read all the safety and operating instructions before operating this appliance. [. . . ] The search can be cancelled at any time by pressing any front panel button or rotating the rotary controller. If no service is found after the search then either your aerial is insufficient for your location or, you may be outside of the covered area for DAB services. If this is the case contact either your Arcam dealer or Arcam customer services. Selecting a service Turn the rotary controller to scroll through the available services and choose the one you wish to listen to. What happens next depends on the setting of the Selection mode (see page 7). If set to `Auto', the displayed service is selected after 2. 5 seconds; if set to `Manual', the display returns to the current service after five seconds unless SELECT is pressed. If >> is shown in the top right corner of the display when a service is selected, a secondary service is also available. Moving the rotary controller clockwise one more click will display this secondary service: press SELECT to listen to it. Service sort menu Services can be sorted by name or by programme type. To change between `sort by name' and `sort by programme type', press the MENU button twice to access the Service Sort menu and turn the rotary controller. Press SELECT to confirm the setting: the tuner reverts to displaying the service name. To exit this menu without making any changes, press the MENU button until the tuner displays the service name. DT81 6 Selection mode Press the MENU button four times to access the Selection Mode menu. This can be used to change the way services are selected when scrolling with the rotary controller or when using the < and > buttons on the remote control. To change between `AUTO' and `MANUAL', turn the rotary controller and press SELECT to confirm the setting: the tuner reverts to displaying the service name. With the selection mode set to manual, the displayed service name is selected by pressing the SELECT button on the tuner or the BAND button on the remote control. When the selection mode is set to auto, the displayed service is automatically selected after 2. 5 seconds. Signal quality meter The signal quality meter is a simple bargraph which gives a quick visual guide to reception quality. Technically, it is an inverse measure of the Viterbi error rate, with zero errors at full scale (all segments are lit) and 300 errors/second (with all segments off). When reception is marginal, the number of segments displayed becomes a very sensitive function of the received signal strength and can be used to optimize the aerial position. Engineering mode The DT81 digital radio tuner has two modes ­ in addition to User Mode (in which the unit powers up) it also offers an Engineering Mode that allows you to view technical information about the currently selected service. From Engineering Mode you can return to User Mode by pressing SELECT and preset 8 simultaneously again. Once in Engineering Mode, each of the eight preset buttons shows different technical information: Preset 1: Ensemble frequency. This is the data rate of the current service in kilobits per second: the higher the number, the better the sound quality. The start and end CU (Capacity Unit) numbers indicate the service's position within the ensemble. The Viterbi rate indicates the amount of error correction that is going on. Audio decoding normally works transparently with Viterbi rates up to about 200; above this, audible degradation of the signal may be noticeable. [. . . ] If you have removed the aerial and this message appears, reconnect the aerial and reselect a service to restore operation. Display shows `No services stored' at the end of the search This will happen when the signal strength is insufficient due to either a poor aerial or lack of an available DAB signal. Audio is lost and display shows `signal weak ­ muted' This happens when the signal becomes weak. Audio is lost and display shows `Service ended' or `Arcam DAB Tuner' This occurs if the selected service is no longer broadcast ­ in practice this will rarely happen. [. . . ]