Use an “open channel” to performance the check (channels 68, 69, 71, 72 and 78A). Turn radio to one-watt power setting, and key the microphone. Call “radio check” three times, followed by your boat name and location. Wait for a reply confirming someone has heard your transmission.
Read moreWhat affects VHF radio communication?
Below we will discuss a few of the most common factors found to affect VHF communications: Transmitter Power, Intervening Topographical Features, and what can be considered to be the most important factor affecting VHF range, antenna height .
Read moreWhich wave is used for VHF communication?
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz) , with corresponding wavelengths of ten meters to one meter.
Read moreWhat is high and low VHF?
VHF signals cover 2 frequency bands. The Low-VHF band covers channels 2-6 and the High-VHF band covers channels 7-13 . Because these signal wavelengths are longer than UHF signals, they can more easily bend over and around certain obstructions in the terrain between the TV broadcast tower and the receiving TV antenna.
Read moreWhat is the UHF frequency range?
UHF, abbreviation of ultrahigh frequency, conventionally defined portion of the electromagnetic spectrum, encompassing radiations having a wavelength between 0.1 and 1 m and a frequency between 3,000 and 300 megahertz . UHF signals are used extensively in televison broadcasting.
Read moreHow far can a UHF reach?
Add obstructions or interference, and most UHF two-way radios have a realistic range of between 1 to 4 miles .
Read moreWhat is medium frequency used for?
Medium Frequency (MF): 300-3000 kHz Because medium frequencies afford stable transmission of radio waves over long distances, they are used primarily for medium wave broadcasting (AM radio), ship communications, LORAN (radio navigation), and other applications .
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