Cambium Networks PTP 550 Series, User Manual

Page: 50 / 249

Chapter 2: System hardware Antennas and antenna cabling
Page 2-12
Antennas and antenna cabling
Antenna requirements
Each connectorized ODU requires one external antenna (normally dual-polar). These antennas
are not supplied by Cambium Networks.
Note
To determine when to install connectorized units and to calculate their impact on link
performance and regulatory limits, see
Planning for connectorized units on page 3-31 .
RF cable and connectors
RF cable of generic type LMR-400 is required for connecting the ODU to the antenna. N type
male connectors are required for connecting the RF cables to the connectorized ODU. Two
connectors are required per ODU. Use weatherproof connectors, preferably ones that are
supplied with adhesive lined heat shrink sleeves that are fitted over the interface between the
cable and connector. Order CNT-400 RF cable and N type male connectors from Cambium
Networks (
Table 14 ).
Table 12 RF cable and connector part numbers
Cambium description Cambium part number
50 Ohm Braided Coaxial Cable - 75 meter 30010194001
50 Ohm Braided Coaxial Cable - 500 meter 30010195001
RF Connector, N, Male, Straight for CNT-400 Cable 09010091001
Note
To select the correct connectors for the antenna end of the RF cable, refer to the
antenna manufacturer’s instructions.
Antenna accessories
Connectorized ODUs require the following additional components:
•
Self-amalgamating and PVC tape: Order these items to weatherproof the RF connectors.
• Lightning arrestors: When the connectorized ODU is mounted indoors, lightning arrestors
are required for protecting the antenna RF cables at building entry. One arrestor is required
per antenna cable. One example of a compatible lightning arrestor is the Polyphaser LSXL-
ME or LSXL (not supplied by Cambium Networks).