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33 Cards in this Set
- Front
- Back
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The distribution of audio and video content to a dispersed audience via any audio-visual medium. |
Broadcasting |
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AM Broadcast frequency range (FCC/ITU-R) |
535-1605 kHz |
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FM broadcast frequency range |
88-108 MHz |
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International shortwave broadcast |
3-30Mhz |
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Regulation of ownership and operation of radio and tv stations |
PD 576 A |
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3 important requirements in broadcasting |
Timing, fidelity, modulation depth |
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Types of broadcasting log |
Program log - name of show and description Operating log - tech details of the transmitter during operation Maintenance log - schedule of tests and repairs |
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Power supplied to the antenna by the transmitter. Should have a tolerance of -5% or -10% |
Licensed Power or Authorized operating power |
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Maximum power of transmitter capable of supplying to the antenna to operate |
Maximum rated carrier power |
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Methods of measuring antenna power |
Indirect and direct |
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Process of varying the amplitude of the high frequency carrier wave in accordance with the amplitude of the modulating signal |
Amplitude Modulation (AM) |
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Comprised of 40 channels within the 27-Mhz range. System of short-distance two way radio communication system for public use |
Citizen's band radio |
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Used for aircraft navigation including VOR, ILS, marker beacons, etc. 108-136 Mhz |
Aeronautical radionavigation |
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Modulation of television transmission |
Vestigial sideband modulation |
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On Christmas eve in 1906, Reginald Fessenden broadcast O Holy Night from Brant Rock to several receivers using... |
Modified High-Speed Alternators |
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Charles Herrold started broadcasting in California with the call symbols... |
KQW |
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Measure of how much the information sigbal modulates the carrier signal |
Modulation index |
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Behaves like a dipole antenna when operated to a ground plane |
Quarter-wave monopole antenna |
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Antenna towers are supported using... |
Guy Wires |
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This is used when buried radial system is impractical |
Counterpoise |
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The antenna is installed to ________ to insulate it from the ground plane |
Ceramic base |
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Area of radio darkness |
Skip zone |
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Area in which the groundwave field is measured at 1mV/m and not subject to objectionable interference and fading |
Primary area |
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The Area serviced by the skywave |
Secondary area |
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The area receiving service from the groundwave but beyond the primary service area and subject to fading |
Intermittent area |
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Channel spacing of AM Broadcasting |
10 khz (ITU-R/FCC) 9 khz (KBP) |
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Channel Bandwidth of AM Broadcasting |
30 khz (FCC) |
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Carrier tolerance of AM Broadcasting |
+/- 20 hz (FCC) +/- 10 hz (KBP) |
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Type of emission of AM Broadcasting |
A3E |
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Maximum Permissible Power in Metro Manila and Other areas |
Metro Manila : 50kW Others : 10kW |
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Minimum physical separation of stations for protection from interference |
RF protection ratios |
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All stations must be protected up to the _____ |
73 dbu contour |
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Antenna towers must be painted with equal-width stripes of colors _______________. |
Orange and white / aviation |
