User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1138/980
2.8.4 ODU300
The ODUs include a waveguide antenna port, type-N female connector for the ODU cable, a BNC female
connector (with captive protection cap) for RSSI access, and a grounding stud.
The ODUs, are designed for direct antenna attachment via a 9500 MPR-E-specific mounting collar
supplied with the antennas.
ODU polarization is determined by the position of a polarization rotator fitted within the antenna mounting
collar.
A remote ODU mounting kit is also available as an option. These may be used to connect an ODU to a
standard antenna, or to a dual-polarized antenna for co-channel link operation.
ODUs are fixed for Tx High or Tx Low operation.
Where two ODUs are to be connected to a single antenna for hot-standby or frequency diversity
configurations, a direct-mounting coupler is used. They are available for equal or unequal loss operation.
Balanced loss is nominally 3 dB. Unbalanced loss is nominally 1/6 dB.
The ODU assembly meets the ASTME standard for a 2000 hour salt-spray test, and relevant IEC, UL,
and Bellcore standards for wind-driven rain.
The ODU housing comprises:
– Cast aluminium base (alloy 380)
– Pressed aluminium cover (sheet grade alloy 1050).
– Base and cover passivated and then polyester powder coated
– Compression seal for base-cover weatherproofing
– Carry-handle
Figure 59. ODU300 housing
ODUs are frequency-band specific, but within each band are capacity-independent up to their design
maximums.
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