Scanning for Stations

Some very basic tuners may not be able to compile a list of radio stations.

Where this is the case, make the search function logical.

Analogue Radio (FM/AM)

In the analogue domain (FM / AM), search order should be frequency.

Scan (or Step) “UP” should:

• Search across increasing frequencies, wrapping to the lowest frequency

Scan (or Step) “DOWN” should:

• Search across decreasing frequencies, wrapping to the highest frequency

Whilst scanning, show the changing frequency value. When stopping on a radio station, show the radio station name as soon as it is available.

Digital Radio (DAB/DAB+)

In DAB the search order should be by frequency to the next ensemble, and then through services within the ensemble.

Scan (or Step) “UP” should

• Search to the next ensemble at a higher frequency THEN
• Step alphabetically through the services on that ensemble

Scan (or Step) “DOWN” should

• Search to the next ensemble at a lower frequency THEN
• Step in reverse alphabetical order through the services on that ensemble

So

• if you step “UP” to an ensemble with services “A Radio, B Radio, C Radio”, they would be presented in that order.
• if you step “DOWN” to an ensemble with services “A Radio, B Radio, C Radio”, they would be presented in the order “C Radio, B Radio, A Radio”.

This means that UP and DOWN always step through the same stations in the same consistent order.

Whilst scanning, show a generic progress bar. When stopping on a radio station, show the radio station name as soon as it is available.