Mode FM

FM broadcast radio with stereo and RDS.

Group	Broadcast radio
In the mode list	Stereo and RDS

Step-by-step: Tutorial-FM

What FM is

FM broadcast radio (87.5 to 108 MHz in most of the world) carries stereo sound and RDS data such as the station name and radio text.

Frequencies and settings

Worldwide.

Setting	Value
Band	87.5 to 108 MHz (the band scan starts at 87.0 MHz)
Frequency	any station: the Scan tab lists them

OnAir takes any frequency you type; the numbers above are the mode's starting point and the range its table describes. In the app the shortcut label is Stereo and RDS.

What OnAir shows

Analogue radio: stereo and RDS (station name, radio text, programme type, traffic flags).

Tips and caveats

• Used and checked on real broadcasts.
• Which radio: Usually yes for narrowband signals: an RTL-SDR tunes roughly 24 MHz to 1.7 GHz at up to about 2.4 Msps. Wide signals such as TV channels need a faster radio, and OnAir says next to the source what the selected radio can do.
• Try it without a radio: most modes include a built-in synthetic test signal, so you can open the screen and try the controls first.
• Receiving and the law: Receiving broadcast radio is legal in most countries. OnAir cannot decode encrypted services. See Legal.

Related pages

• FM radio with RDS
• All modes, Broadcast radio
• Supported radios, Troubleshooting, FAQ
• More in Broadcast radio: DAB / DAB+, DRM, HD Radio, CDR