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What frequency is best for long range?
You might need to adjust the VHF frequency for long-range communication. Simply turn the VHF button on your radio and set the frequency anywhere between 130 and 174 MHz. Adjusting the frequency automatically adjusts the wavelength. In addition, the UHF also gets automatically balanced.
Does 900MHz affect 2.4 GHz?
Both 802.11b and Bluetooth devices operate at the 2.4GHz frequency. As these devices continue to multiply in the work place, 900MHz wireless headsets could have less potential interference with these other technology products than do 2.4GHz wireless headsets.
Why higher frequencies have less range?
Range as a Function of Frequency Radio waves at lower frequencies propagate further than radio waves at higher frequencies. For example, a 900 MHz radio will transmit more than twice as far in free space as a 2.4 GHz radio when both radios use the same modulation and output power.
How far will a 25 watt UHF radio transmit?
For example, a 25-watt marine radio will roughly have a maximum range of 60 nautical miles (111 km) between antennas mounted on tall ships, but that same radio will only have a range of 5 nautical miles (9 km) between antennas mounted on small boats at sea level.
Does higher frequency means longer distance?
The distance that the sound needs to travel is one of the key considerations in determining the frequency of the signal. Low frequency signals are absorbed less rapidly in the ocean than high frequency signals. They can therefore travel longer distances and still be detected.
Does higher frequency mean higher distance?
In terms of electromagnetic waves, generally higher frequency (shorter wavelength/higher energy) waves travel through objects more easily than lower frequency (longer wavelength/lower energy) waves. There is no linear relation however since there are many different phenomena that attenuate electromagnetic waves.
Does 2.4 GHz require line of sight?
Both frequencies need “line-of-sight” for proper and predictable operation. However some type of obstructions are more detrimental to a 2.4 GHz link. Trees with leaves that have dimensions near the wavelength of 2.4 GHz (but typically shorter than the wavelength of 900 MHz), will cause higher attenuation at 2.4 GHz.
Does 2.4 GHz go through trees?
2.4 Ghz can typically penetrate a group of 2-3 trees (or 1 pine tree!), but the frequency is generally congested outside of extremely rural areas. 5.8 Ghz can typically penetrate one tree, but not reliably.