Technical data

Contents
Chapter 1 - System Description...............................................................1-1
Introduction ........................................................................................... 1-2
Command Channel and Control-Display-Unit (CDU) Ports ........................ 1-3
Alvarion Hardware .................................................................................. 1-4
GPS Receiver : Specification ......................................................................... 1-4
Input Power.................................................................................................. 1-4
Output Specification .................................................................................... 1-5
1PPS ......................................................................................................... 1-5
2.048 MHz................................................................................................. 1-6
Time of Day ............................................................................................... 1-6
LEDs ......................................................................................................... 1-7
Input / Output Message Format................................................................... 1-7
Time of Day Output................................................................................... 1-7
Electrical Safety ........................................................................................... 1-7
Chapter 2 - Installation .............................................................................2-1
Installation............................................................................................. 2-2
Antenna Mounting ....................................................................................... 2-2
Lightning Protection Considerations............................................................. 2-4
Protection Against Lightning......................................................................... 2-6
At the Antenna .......................................................................................... 2-6
At the GPS Receiver Unit ........................................................................... 2-8
The Lightning Arrestor ............................................................................... 2-10
Detailed Installation procedure................................................................... 2-11
Installing the Surge Protection................................................................. 2-11
Connecting the N-type to TNC adaptor .................................................... 2-11
Connecting the Grounding Cable............................................................. 2-12
Connecting the “Equipment” side ............................................................ 2-12
Connecting the Surge side....................................................................... 2-14
Connection Diagram................................................................................ 2-15
Mounting the GPS Receiver ........................................................................ 2-16
Mounting in Equipment Cabinets ............................................................ 2-16