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2. List of most-listened-to radio programs - Wikipedia

   en.wikipedia.org/wiki/List_of_most-listened-to...

   The A.C. Nielsen company, which continues to measure television ratings today, took over American radio's ratings beginning with the 1949–50 radio season and ending in 1955–56. [40] During this era, nearly all of radio's most popular programs were broadcast on one of three networks: NBC Red, NBC Blue, or CBS' Columbia network.

3. Comparison of radio systems - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_radio_systems

   World radio systems (Terrestrial) System Type Modulation Data rate Sidebands? Ch. Bandwidth Radio spectrum Sound Codec Digital subchannels SFN Metadata/RDS/RBDS; AM radio: Analog radio: Amplitude Modulation: N/A? 18–20 kHz: 148.5-283.5 kHz (Longwave) 510–1610 kHz (Europe) 510–1710 kHz (USA and Canada) N/A: N/A: No: None Motorola C-QUAM ...

4. List of software-defined radios - Wikipedia

   en.wikipedia.org/.../List_of_software-defined_radios

   Crystal controlled two channels Yes Yes Yes Cyan [34] Pre-built 100 kHz – 18 GHz 1 – 3 GHz (8 fully independent Rx chains and 8 fully independent Tx chains, each capable of up to 1 GHz of RF bandwidth) 16 16 Yes 1–3 GSPS ADCs; 2.5 GSPS DACs; 1 – 16 receive and 1 – 16 transmit (total of 16 radio chains) 4x 40Gbit/s QSFP, Ethernet Yes Yes

5. Comparison of music streaming services - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_music...

   Discontinued radio streaming service; now a database for tracking listening histories [93] 28 April 2014: Batanga Radio: Shut down [94] 25 December 2017: MixRadio: Shut down [95] 21 March 2016: Music Unlimited: Replaced by PlayStation Music powered by Spotify. [96] 29 March 2015: Musicovery: Shut down the interactive radio service and now a ...

6. Two-way radio - Wikipedia

   en.wikipedia.org/wiki/Two-way_radio

   Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

7. Signal strength and readability report - Wikipedia

   en.wikipedia.org/wiki/Signal_strength_and...

   A signal strength and readability report is a standardized format for reporting the strength of the radio signal and the readability (quality) of the radiotelephone (voice) or radiotelegraph (Morse code) signal transmitted by another station as received at the reporting station's location and by their radio station equipment. These report ...