Mode CDR

CDR: China's digital radio in the FM band.

Group	Broadcast radio
Default frequency	106.1 MHz
Default sample rate	2 Msps
In the mode list	China digital radio

Step-by-step: Tutorial-CDR

What CDR is

CDR (China Digital Radio, GY/T 268) is an OFDM digital radio standard that sits in the FM band (about 87 to 108 MHz).

Frequencies and settings

Setting	Value
Start frequency	106.1 MHz
Tuning range of the mode table	87 to 108 MHz
Sample rate asked	2 Msps
Lowest working rate	768 ksps
Channel width	0.5 MHz

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 China digital radio.

What OnAir shows

CDR (China Digital Radio) OFDM digital radio in the FM band.

Tips and caveats

• Checked with generated signals and impairments; recordings of real signals welcome.
• 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

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