What is VHF and UHF frequency range?
In the United States, the frequencies used for these systems may be grouped into four general bands or ranges: low-band VHF (49-108 MHz), high-band VHF (169-216 MHz), low-band UHF (450-806 MHz), and high-band UHF (900-952 MHz). VHF represents “Very High Frequency” while UHF represents “Ultra High Frequency.”
Is MHz UHF or VHF?
UHF stands for “Ultra High Frequency” while VHF stands for “Very High Frequency.” UHF can range from low band (378-512 MHz) to high band (764-870 MHz) while VHF ranges from low band (49-108 MHz) to high band (169-216 MHz). MHz stands for Megahertz and measures the speed of electronic devices.
What is the maximum range of VHF?
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.
Is 400 MHz a VHF or UHF?
UHF
UHF radios (Ultra High Frequency) operate on frequencies ranging from 400-512 Megahertz (MHz).
Which is stronger VHF or UHF?
The two frequency ranges (also called “frequency bands”) used in most two-way radios are VHF (Very High Frequency), and UHF (Ultra High Frequency). We are often asked “Is VHF or UHF better?” Neither is inherently better, they each have strong points and weaknesses. VHF frequencies can penetrate objects better than UHF.
Why is UHF better than VHF?
Radios with lower frequencies (VHF) have longer wavelengths, making them ideal for work across wide areas free from obstruction, as well as outdoor use. UHF radios operate at a higher frequency, which is ideally suited for wireless communications that need to penetrate buildings, walls, concrete, or other barriers.
Do police use VHF or UHF?
Police radios operate in a 700/800 MHz UHF band. This gives them a considerable amount of range which is pretty good in urban areas. The P25 radio systems give an improved range for officers. Getting a larger antenna on your walkie talkie can improve the amount of range you receive.
How do I increase my VHF range?
The range of your VHF radio can be extended by elevating your antenna, increasing the quality of contact. While many challenges in a tactical environment can be avoided, in most instances terranean features aren’t one of them.
How far can 400 MHz reach?
~30 kilometers
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.
How far will a 6 watt VHF radio transmit?
Some handheld radios have 6 watts which can reach up to 20 miles in the right conditions.
Can VHF talk to UHF?
VHF and UHF Walkie Talkies can’t talk to each other. The terms UHF and VHF refer to the “wavelength”. This term originates from the early days of radio communication when frequencies were measured by the distance between the peaks of two consecutive cycles of a radio wave instead of the number of cycles per second.
Does VHF radio work on land?
Marine VHF radios, whether fixed or handheld, may not be used on land, period. It’s the law. Once a VHF radio goes ashore, it cannot be used for marine band transmission (without a Coast Station License).
Can a VHF radio talk to a CB radio?
CB or its close relatives fall into the HF frequency range (covering somewhere around 26 to 28 MHz, depending on country), so anything that accurately calls itself a VHF radio will not transmit (and most likely will not receive) CB.
How far can a 25 watt VHF radio reach?
60 nautical miles
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.
How far can 900 MHz travel?
The lower frequency radio waves of 900 MHz radios provide greater penetration through walls, trees and other obstacles, making it optimal for most non-line-of-sight applications. A typical AW900xTR Radio using high powered AW-15 15dbi antenna can go distances of up to 1500 feet with buildings and/or trees in the way.
Which has longer range VHF or UHF?
VHF and UHF Radios Compared – Which Is Best? VHF (136 – 174MHz) signals generally work best outdoors, giving a somewhat longer range for the same power output than UHF (400 – 470MHz). However, VHF signals really do not work well when there are obstructions like buildings around.
Do you need a license for a handheld VHF?
You must have a separate Ship Portable Radio Licence for each hand held VHF DSC radio. This is because each individual radio is given a separate identity.
Is VHF better than CB?
Line of site without a repeater, your VHF radio will work great and far better than a CB in most cases, however, YOU WILL ONLY BE ABLE TO TALK TO THE PEOPLE ON THAT FREQUENCY. This means everyone else will have to have the same radio capabilities as you do.
How Far Will 6 Watt VHF transmit?
Some handheld radios have 6 watts which can reach up to 20 miles in the right conditions. Having a radio with you while participating in water sports will help to keep you safe.
How far can 915 MHz reach?
These sub gigahertz frequency antennas facilitate low bitrate long-distance transmissions, that can exceed 10 kilometers (6.21 miles). In North America, the 915 MHz frequency is specified for use by this technology, meaning that 915 MHz antennas are typically associated with LoRa in the US market.
How far can 915 MHz go?
915 MHz is the center frequency of the band bounded by 902 and 928 MHz. Within this band, FCC regulations allow 50 mV/m electrical field strength, at a distance of 3 meters from the transmitting antenna.
Can you use VHF on land?
How much is a VHF licence?
free
VHF radio licences are free, you just need to go to www.ofcom.org.uk and select Marine VHF. You will also need an operator’s licence for at least one person aboard, usually the skipper. This is administered by the RYA who can advise you where to take the relevant course and exam.
Can VHF talk to CB?
How far can a 25 Watt VHF radio reach?