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  2. List of radio stations in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_radio_stations_in...

    Eastern Illinois University: Adult contemporary/Mix WEJT: 105.1 FM: Shelbyville: The Cromwell Group, Inc. of Illinois: Adult hits WEMV-LP: 103.1 FM: Vandalia: Elijah Message Ministry: Christian WEPS: 88.9 FM: Elgin: Board of Education School District U-46: High school/Public radio/Classical WERV-FM: 95.9 FM: Aurora: Alpha Media Licensee LLC ...

  3. Roll-off - Wikipedia

    en.wikipedia.org/wiki/Roll-off

    Roll-off is also significant on audio loudspeaker crossover filters: here the need is not so much for a high roll-off but that the roll-offs of the high frequency and low-frequency sections are symmetrical and complementary. An interesting need for high roll-off arises in EEG machines. Here the filters mostly make do with a basic 20 dB/decade ...

  4. StarCom21 - Wikipedia

    en.wikipedia.org/wiki/StarCom21

    StarCom21 uses about 186 radio towers throughout Illinois, many owned by state agencies. It uses radio channels in the 700 and 800 MHz bands, all licensed to the State of Illinois. It uses APCO-25 9600 baud control channel frequencies and APCO-25 digital modulation.

  5. WLS (AM) - Wikipedia

    en.wikipedia.org/wiki/WLS_(AM)

    Its transmitter site is located on the southwestern edge of Tinley Park, Illinois in Will County. [3] [7] WLS is a Class A station broadcasting on the clear-channel frequency of 890 kHz with 50,000 watts, using a non-directional antenna fed by a Nautel NX-50 transmitter, with a Harris DX-50 serving as a backup transmitter. Both transmitters run ...

  6. List of television stations in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_television...

    Area served City of license VC RF Callsign Network Notes Carbondale/~Paducah KY: Johnston City: 15 15 W15BU-D: 3ABN: 3ABN Proclaim on 15.2, 3ABN Dare to Dream on 15.3, 3ABN Latino on 15.4, 3ABN Kids on 15.5, 3ABN Radio on 15.6, 3ABN Radio Latino on 15.7, Radio 74 on 15.8

  7. List of North American broadcast station classes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    Class B and D stations can be found on any frequencies from 540 kHz to 1700 kHz except where frequencies have been reserved for Class C stations. Class C stations can be found in the lower 48 US states on the frequencies of 1230 kHz, 1240 kHz, 1340 kHz, 1400 kHz, 1450 kHz, and 1490 kHz (commonly known as "graveyard" frequencies).

  8. List of ATSC 3.0 television stations in the United States

    en.wikipedia.org/wiki/List_of_ATSC_3.0...

    This is a list of United States television stations which broadcast using the ATSC 3.0 standard, branded as "NextGen TV". [1] Market Lighthouse station [2] RF channel

  9. Filter (signal processing) - Wikipedia

    en.wikipedia.org/wiki/Filter_(signal_processing)

    All-pass filter – all frequencies are passed, but the phase of the output is modified. Cutoff frequency is the frequency beyond which the filter will not pass signals. It is usually measured at a specific attenuation such as 3 dB. Roll-off is the rate at which attenuation increases beyond the cut-off frequency.