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 through the services on that ensemble

Scan (or Step) “DOWN” should

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

The ordering of services within an ensemble should follow the list sorting rules.

This means:

• 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, do not show the frequency or DAB channel number, but instead show a generic progress bar.