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In case of N-type coaxial ODU, the interconnecting cable would be N-type and the antenna would need to
have either an N-type connector or to be equipped with a N to PDR70 adapter.
SEPARATE INSTALLATIO N OF 7 AND 13 GHZ DIRECT MOUNT ODU
The “antenna direct mount” type ODUs for 7 GHz and 13 GHz are possible to install directly to the antenna
using the NEC proprietary antenna interface. It is also possible to use a separate installation using a
waveguide. The ODU installation bracket will then have an adapter from NEC interface to the appropriate
IEC standard waveguide interface.
7 GHz uses UDR/PDR84 flanges and 13 GHz uses PBR/UBR140. See Figure 16 for the 7 GHz case. Again,
UDR to PDR or PBR to UBR joints should be used with the suitable gasket or O-ring for weather-proofing.
Figure 16. 7 GHz separate mount using a direct mount ODU and mounting bracket with adapter
DIRECT MOUNT INSTALLATION
In the 7 GHz bands and higher, the standard installation method is to use e.g. Andrew antennas with an
integrated NEC proprietary antenna interface, which includes the four attaching holes and the hole for the
guide pin etc. See Figure 17. The antenna is fixed to the installation tube and the direct mount type ODU to
the antenna.
