ITWissen.info - Tech know how online

channel subdivision

A channel spacing is the frequency distance between two immediately adjacent frequency channels. This distance is measured between the center of the channel and the center of the channel and is specified in Hertz( Hz), kilohertz ( kHz) or megahertz( MHz).

Normally, the channel spacing is larger than the channel bandwidth and depends on the frequency band and service used. Therefore, the channel raster is decisive for the transmission bandwidth of the channel and the width of the safety frequency bands located between two transmission frequency bands.

Relationship between channel raster and channel bandwidth considering a guard band

Relationship between channel raster and channel bandwidth considering a guard band

The channel raster depends on the frequency usage and is defined in the frequency usage plan of the Federal Network Agency.

Narrowband services such as shortwave or CB radio have a small channel spacing of 5 kHz and 10 kHz, respectively, while others such as cordless telephony( CT) have a spacing of 25 kHz and maritime radio 50 kHz. Broadband services such as television, for example, have a channel spacing of 7 MHz, and very broadband services such as Dense Wavelength Division Multiplexing( DWDM) have one of 10 GHz.

Informations:
Englisch: channel subdivision
Updated at: 25.09.2007
#Words: 180
Links: channel, frequency (f), hertz (Hz), kilohertz (kHz), kilohertz (kHz)
Translations: DE
Sharing:    

All rights reserved DATACOM Buchverlag GmbH © 2024