Alcatel-Lucent 9500 MXC - Page 211

9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. II-3-117
4+4 Space Diversity Operation Using CCDP and ACCP
Figure 3-67 illustrates ‘quattro’ 4+4 operation.
• When used within 9500 MXC Super PDH rings this configuration supports up
to four co-path space diversity protected (SD) ring links.
• The combination of CCDP (co-channel dual polarization) and ACCP (alternate
channel co-polarization) supports the four links on two 28/30 MHz channels.
• Each of the two radio channels supports two co-channel links. Figure 3-61
illustrates the channel/link alignment.
• Link maximums on single gateway rings are 64xE1 or 84xDS1.
• The couplers must be equal-loss.
• The nominal loss through each coupler is 3.5 dB, meaning an additional 7 dB
loss must be included in the system gain calculations for each link.
Figure 3-67. 4+4 Space Diversity Operation Using CCDP and ACCP
V
H
ODU 300s
V
H
Ch D Primary
Ch A Primary
Ch B Primary
Ch C Primary
Ch A Secondary
Ch B Secondary
Ch C Secondary
Ch D Secondary
ACCPCCDP
F1
F1
F1
F1
F2
F2
F2
F2