ETSI EN 301 127 Final draft Version 1.3.1Fixed Radio Systems; Point-to-point equipment; High capacity digital radio systems carrying SDH signals (up to 2 x STM-1) in frequency bands with about 30 MHz channel spacing and using co-polar arrangements or Co-Channel Dual Polarized (CCDP) operation

standard by European Telecommunications Standards Institute, 03/01/2002