How do you determine the range of an FM transmitter?
how do you calculate the Wattage of FM Transmission of a typical FM Transmitter? Measuring the voltage at the antenna is the only direct way. If you antenna is a quarter wave monopole it will have a radiation resistance of about 37 ohms and so if you have 2 V RMS (VHF/FM) then the output power will be 4/37 = 108 mW.
How is radio range calculated?
That formula is: Horizon in kilometers = 3.569 times the square root of the antenna height in meters. For example, if the antenna height of a radio is at 6 feet (1.82880 meters tall) the horizon is 2.99 miles away (4.83 kilometers) and another radio with the antenna at 6 feet, that equals approximately a 6-mile range.
What is the range of RF?
Radio frequency (RF) is the oscillation rate of an alternating electric current or voltage or of a magnetic, electric or electromagnetic field or mechanical system in the frequency range from around 20 kHz to around 300 GHz.
How far does the near field extend?
From Figure 1, the near field extends for approximately 3.5 m. Stores with several entry doors often have a number of RFID antennas spaced across the entry area to give complete coverage because the field intensity falls rapidly with distance from the antenna.
How far can RF signal travel?
Thus the typical ranges with around 400 MHz frequency range with 1 W transmitter power are up to ~30 kilometers and up to ~80 kilometers with 10 W transmitter power. See sample picture of a RF link functional factors at the end of this document. The links can be extended by using repeater radio stations.
How do I find HAAT values for a particular FM or TV station?
Antenna Height Above Average Terrain ( HAAT) values for a particular FM or TV station can be obtained from the FM Query or the TV Query, or use the HAAT Calculator . The class of an FM station may be retrieved from the FM Query.
How does range and power work with FM broadcast transmitters?
I’m Paul Hollings (LinkedIn profile) Head Engineer at Aareff Systems and I’m going try and explain how range and power works with fm broadcast transmitters. In theory the range of a transmitted radio signal is infinite regardless of power used, basically it goes on and on forever until it encounters an obstruction.
How do I find the class of an FM station?
The class of an FM station may be retrieved from the FM Query. F (50,50) protected service contours for FM stations are defined as follows: 60 dBu (1 mV/m) contour for commercial Class A, C3, C2, C1, and C stations 60 dBu for all classes of noncommercial educational stations in the reserved band (88.1 to 91.9 MHz)