What is the VHF transceiver?

The very high frequency (VHF) is a device that consists of a transmitter and a receiver that works between 30 Megahertz (MHz) to 300 Megahertz (MHz). The wavelength of the VHF transceiver is between 39.37 inches (1 m) to 393.70 inches (10 m), mainly depending on the frequency used. The wavelength combined with line spread (LOS) determines that VHF devices such as Walkie-Tallkies' and Citizen Band (CB), receiving and transmitting range.

VHF promotion is generally not affected by the ionosphere in the same way of high frequency (HF). As a result of non -infherospheric interference VHF transmissions are limited to the local area; This prevents the interference of the cross call a few thousand kilometers away. Promotional distances for VHF devices also depend on environmental topography, height of antennas and several other factors. Fixed objects, such as trees and buildings, usually weaken or completely block the spread of elk. HF and Ultra-Vysoká frequency (UHF) belts are often includedThose into the VHF transceiver device to increase the reliability of transmission. In some countries, VHF radio frequencies from 108 MHz to 118 MHz are reserved for navigation beacons; While 118 MHz to 137 MHz are used for air traffic control. VHF 121.5 MHz frequency is often used for emergency signals.

VHF transceiver devices are also used in personal and business use. Personal use of VHF usually includes leisure activities where cellular devices are not suitable. For businesses, such as taxi cabins and other transport industries, basic stations are used to expand the communication range of VHF equipment.

  The

NSCEIDAiver is different in aesthetics, radio bands and operating settings. Despite the differences in models and settings, the basic operational principles remain the same. Most VHF transceivers will have a button for easy and fast communication. PUSH-to-Talk on most transceivers will allow the parties to transmit or communicate with another party on the same frequency and channel. When using a button, only one person can transmit at a time while the other receives.

 

For larger peace Mind, many broadcasting devices such as Walkie-Tallkies include the possibilities of encryption and privacy. Sensitive information about the unauthorized third party can still be captured without security. To secure the channel, it generates the encryption function Walkie-Talkie code or password to be used between the parties. Another security option that is often used in conjunction with private codes is the use of voice scratching.