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ETSI - PRETS 300 234

Transmission and Multiplexing (TM); High Capacity Digital Radio-Relay Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements

inactive
Organization: ETSI
Publication Date: 1 January 1995
Status: inactive
Page Count: 28
scope:

This European Telecommunication Standard (ETS) specifies parameters for digital radio-relay systems with a channel capacity of 1 x Synchronous Transport Module-level 1 (1 x STM-1) designed to operate in defined bands up to 15 GHz utilising approximately 30 MHz between adjacent cross-polar channels.

The parameters specified fall into two categories:

a) those required to provide compatibility between channels from different sources of equipment on the same route, connected either to separate antennas, or to separate polarizations of the same antenna. This category also includes parameters providing compatibility with the existing radio-relay network;

b) parameters defining the transmission quality of the proposed systems.

The task of defining compatibility requirements with analogue and digital systems on the same hop and at nodes is made complex by the fact that analogue systems and some digital systems are not standardized. Compatibility requirements are, therefore, limited to allowing the operation of digital and analogue channels on separate ports of the same antenna.

The standardization includes the following specifications:

- transmitter and receiver characteristics;

- baseband and Radio Frequency (RF) interface characteristics;

- diversity system characteristics.

Two possible baseband interfaces have to be considered:

- one for STM-1 signals (electrical and/or optical) in accordance with ITU-R Recommendation 750; and

- one for 140 Mbit/s plesiochronous signals (only electrical), according to ITU-T recommendation G.703.

The 140 Mbit/s signals should be carried "open-port", i.e. in a transparent manner independent of their content. They should be mapped into a 155 Mbit/s STM-1 signal as described in ITU-T Recommendations G.708 and G.709.

As regards the STM-1 signal the Section Overhead (SOH) processing is covered in a separate ETSI STC TM 4 document (a report on Synchronous Digital Hierarchy (SDH) aspects) and in ITU-R Recommendation 750 [7].

Document History

November 1, 2001
Fixed Radio Systems; Point-to-Point Equipment; High Capacity Digital Radio Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
A description is not available for this item.
February 1, 2001
Fixed Radio Systems; Point-to-Point Equipment; High Capacity Digital Radio Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
The present document specifies parameters for high capacity STM-1 digital radio-relay systems designed to operate in defined bands up to 15 GHz. The channel spacing between adjacent cross-polar...
October 1, 2000
Fixed Radio Systems; Point-to-Point Equipment; High Capacity Digital Radio Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
The present document specifies parameters for high capacity STM-1 digital radio-relay systems designed to operate in defined bands up to 15 GHz. The channel spacing between adjacent cross-polar...
October 1, 1998
Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); High Capacity DRRS Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
The present document specifies parameters for digital radio-relay systems with a channel capacity of 1 x Synchronous Transport Module-level 1 (1 x STM-1) designed to operate in defined bands up to 15...
May 1, 1998
Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS);High Capacity DRRS Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
Foreword This draft amendment to ETS 300 234 (1995) has been produced by the Transmission and Multiplexing (TM) Technical Committee of the European Telecommunications Standards Institute (ETSI), and...
January 1, 1995
Transmission and Multiplexing (TM); High Capacity Digital Radio-Relay Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
This European Telecommunication Standard (ETS) specifies parameters for digital radio-relay systems with a channel capacity of 1 x Synchronous Transport Module-level 1 (1 x STM-1) designed to operate...
PRETS 300 234
January 1, 1995
Transmission and Multiplexing (TM); High Capacity Digital Radio-Relay Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
This European Telecommunication Standard (ETS) specifies parameters for digital radio-relay systems with a channel capacity of 1 x Synchronous Transport Module-level 1 (1 x STM-1) designed to operate...
January 1, 1992
Transmission and Multiplexing (TM); High Capacity Digital Radio-Relay Systems Carrying 1 x STM-1 Signals and Operating in Frequency Bands with About 30 MHz Channel Spacing and Alternated Arrangements
This ETS specifies parameters for digital radio-relay systems with a channel capacity of 1 x STM-1 designed to operate in defined bands up to 15 GHz utilizing approximately 30 MHz between adjacent...

References

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