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The First Half Of The List

The air around us is penetrated by many radio waves and signals. And as many frequencies and communication standards exist as even more cell phone jammers are made to block all those frequency bands. But what are those frequencies and what do you know about them?

 

Here is some information for you.

 

GSM800

 

This frequency band has 824-849MHz (uplink) and 869-894MHz (downlink) frequency coverage. Uplink means that signal goes to the station and downlink means that signal goes to the mobile devices from the station. So uplink is signal sent and downlink is signal received by your mobile phone.

 

It is used in USA (AMPS), Canada, Australia and some Americas countries. It is also known as GSM850.

 

GSM900

 

This frequency band has 890-915MHz (uplink) and 935-960MHz (downlink) frequency coverage. The duplex spacing (difference between uplink and downlink) is 45MHz.

 

It is used in Europe, Africa, Australia and Oceania, Middle East and most part of Asia.

 

The full description of the GSM abbreviation

 

3G GSM Jammers

 

GSM1800

 

This frequency band has 1710-1785MHz (uplink) and 1805-1880MHz (downlink) frequency coverage. The duplex spacing equals 95MHz.

 

United Kingdom calls it DCS, Hong Kong calls it PCS (but for the rest of the world PCS is GSM1900).

 

GSM1900

 

This frequency band has 1850-1910MHz (uplink) and 1930-1990MHz (downlink) frequency coverage.

 

It is used in Canada, Australia, USA and some Americas countries. In North America it is well-known as PCS.

 

GPS

 

It has five different frequencies, but only three of them can be used by civilians. They are L1, L2 and L5 bands.

 

The whole picture how GPS system works

 

GPS Jammers

 

L1 (1575.42MHz) and L2 (1227.6MHz) are the common frequencies used by satellites. The L5 (1176.45MHz) is the improved band for international aeronautical navigation, so it is more jam-resistant than L1 and L2 bands.

 

L3 (1381.05MHz) is used by United States Nuclear Detonation Detection System and L4 (1379.913MHz) is under the research for additional ionospheric correction. They are only for military usage.

 

To learn about the rest of the frequency bands read the second part of this article!