9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. II-3-103
The RAC 30V3s (ACAP) must be on different frequency channels, or if on
adjacent channels (as shown), one should be configured for vertical polarization,
and the other for horizontal. The RAC 40s (CCDP) are on the same frequency
channel, with one configured for vertical polarization, and the other for
horizontal.
Each ODU 300 is connected to either the V and H polarization feedhead on a
dual-polarized antenna, using a remote mount and a flexible waveguide
connection.
Figure 3-56. ACAP and CCDP Operation
RAC 40s can be hot-standby or diversity protected.
Figure 3-57 shows a RAC 40 pairing in an INU. The cable pair between the RAC
40s provides the sample of the unwanted signal (opposite polarity signal)
received on one RAC, to the other RAC.
Figure 3-57. Example Co-Channel STM1 RAC 40 Deployment
9500 MXC fitted with RAC 40s meets ETSI EN 301 127 requirements for
28 MHz
28 MHz56 MHz
2 x RAC 30 2 x RAC 40
ACAP CCDP
V
V
HH
RAC
40
RAC
40
RAC
DAC
NCC
INU
Dual Polarized
Antenna
To horizontal
feedhead
To vertical
feedhead
XPIC in/out
connections
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