# Quick Answer: What Is The 800 MHz Band Used For?

## What frequency does law enforcement use?

All channels, except those in the 4.9 GHz and 5.9 GHz bands, are subject to frequency coordination to ensure against mutual interference….Public Safety Spectrum.FrequencyMHz Available for Public Safety150-174 MHz (VHF High Band)3.6 MHz [non-contiguous]220-222 (220 MHz band)0.1 MHz10 more rows•Sep 17, 2018.

## 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.

## What is a 800 MHz radio system?

Public safety radio systems (such as those used by police, firefighters and emergency medical technicians) operate in several portions of the 800 MHz band, which consists of spectrum at 806-824 MHz paired with spectrum at 851-869 MHz.

## Why is 13.56 MHz used?

This one of the frequencies `internationally` selected in 1947 for Industrial, Scientific and Medical (ISM) applications. It is supposed to allow for some power applications, without disturbing potential surrounding communications (however, note that NFC is using the same frequency…)

## How far can 400 MHz reach?

Sample calculation Radius of the Fresnel zone for 400 MHz and d = 3000 meters: = 0.5 √0.75 3000 = 27.71 m Result: the radius of the Fresnel zone is 27.71 m at a wavelength of 0.75 m (400 MHz) in a distance of 3000 m between the antennas.

## What frequency do cell towers transmit?

Carrier Frequencies and BandsCarrier3G Frequencies4G BandsVerizonCDMA 800, 1900 PCS2, 4, 5, 13*, 66AT&TGSMA/HSPA/HSPA+ 1900 MHz, 850 MHz2, 4, 5, 12*, 14, 17*, 29, 30, 66T-MobileGSM/HSPA/HSPA+ 1900 MHz, 1700/2100 MHz2*, 4*, 5, 12*, 66, 71*SprintCDMA 800 MHz, 1900 MHz25*, 26, 41

## Which is better 315mhz or 433MHz?

So 315Mhz is not allowed in Europe, while both 315Mhz and 433Mhz can be allowed in USA, so to be more international, we would recommend our customers choose 433Mhz because it is simply a worldwide frequency that can be used everywhere. Second, choosing 433.92Mhz has operating distance advantage.

## What does 20 MHz bandwidth mean?

Technically 20MHz bandwidth refers literally to a width or range of frequencies. So for example WiFi channel 6 is based on a central frequency of 2437 MHz but when operating with 20 MHz bandwidth the actual frequency used will vary between 2427 and 2447 MHz.

## What is 700 MHz frequency?

The 700 MHz band is actually the set of frequencies between 698 and 806 MHz, which puts them in the Ultra High Frequency, or UHF, range of radio frequencies. In the United States, these were and are still used as television channels 52 through 69.

## What devices use 433MHz?

433MHz is a commonly used frequency band for all types of equipment that require little power, such as garage door openers, headphones, baby phones and remote controls. Also many inexpensive transmitters and receivers for switching devices and light dimmers operate on the 433MHz band.

## Is higher MHz better?

RAM frequency is measured in MHz and usually immediately follows the DDR version in the RAM spec. … This is why though higher frequency RAM is technically faster, that additional speed often does not translate into better actual real world performance.

## Is 5GHz faster than 2.4 GHz?

The primary differences between the 2.4 GHz and 5GHz wireless frequencies are range and bandwidth. 5GHz provides faster data rates at a shorter distance. 2.4GHz offers coverage for farther distances, but may perform at slower speeds.

## What is a trunked frequency?

A trunked radio system is a digital two-way radio system that uses a digital control channel to automatically assign frequency channels to groups of users. … These systems typically have access to multiple channels, up to 40 – 60, so multiple groups in the same area can communicate.

## What band is 800 MHz?

Public safety radio systems (such as those used by police, firefighters and emergency medical technicians) operate in several portions of the 800 MHz band, which consists of spectrum at 806-824 MHz paired with spectrum at 851-869 MHz.

## What is the 900 MHz band used for?

The 33-centimeter or 900 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio on a secondary basis. It ranges from 902 to 928 MHz and is unique to ITU Region 2. It is primarily used for very local communications as opposed to bands lower in frequency.

## What is 433 MHz band used for?

433 MHz frequency. 433MHz is a commonly used frequency band for all types of equipment that require little power, such as garage door openers, headphones, baby phones and remote controls. Also many inexpensive transmitters and receivers for switching devices and light dimmers operate on the 433MHz band.

## What is 700 MHz spectrum used for?

The location of the 700 MHz Band — just above the remaining TV broadcast channels — gives it excellent propagation characteristics. This allows the 700 MHz signals to penetrate buildings and walls easily and to cover larger geographic areas with less infrastructure (relative to frequencies in higher bands).