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Help with RF signals and types.

thread236-118972

Help with RF signals and types.

Help with RF signals and types.

(OP)
Hi,
I need help with the different types of signals and the ranges that they fall in, most specifically RF, GSM, firewire and high frequency communications. I am looking for a good link to any site giving good details on frequency ranges.

RE: Help with RF signals and types.

Firewire is a wired standard often used for digital camcorder to PC connections.

HF is usually defined as RF between 3 and 30 MHz (also known as 'shortwave').

Not sure off-hand about GSM - it's one of those cell phone standards.

RE: Help with RF signals and types.

GSM appears to be 'tri-band': 900, 1800, and/or 1900 MHz, depending on where you are.

RE: Help with RF signals and types.

In the UK and Europe, GSM is operated on two frequency ranges, 900MHz and 1800MHz.  The US uses 1900MHz.  Tri-band phones can use all these frequencies.

Whereabouts in the world are you, Salmonaxe, since spectrum plans are defined by national governments and vary throughout the world.

Generally:

HF - 3-30MHz
VHF - 30-300MHz
UHF - 300MHz-3GHz
SHF - 3-30GHz (also called millimetre wave)
EHF - 30-300GHz

Regards

Dave Roseman

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