User's Guide Part 1

Protection of the GPS receiver for PTP-SYNC Chapter 2 Planning considerations
phn-0896_009v003
2-38
UNDER DEVELOPMENT
Feb 2010
The grounding requirements of a tower or mast mounted GPS receiver module are:
• The metal tower or mast must be correctly grounded.
• The cable screen must be bonded to the tower at the top and bottom ends.
• Additional grounding at intermediate points of the cable may be required if the
cable is longer than 15m (50 feet).
Figure 2-21 GPS receiver mounted on tower or mast
Tower Ground Bar (TGB)
External Ground Bar (EGB)
Rack Ground Bar (RGB)
Equipment Rack
PTP-SYNC
Cable Ground Kit
note 1
Cable Ground Kit
Cable Ground Kit
Master Ground Bar (MGB)
PTP-SYNC Ground Cable
Ground Bus Conductor
GPS Rx Module to LPU cable
Superior Essex Cable
(screened shield)
Note 1 : Additional ground kits shall be installed as necessary to
reduce the distance between ground kits to 61m (200ft) or less.
In high lightning prone areas, additional ground kits should be
installed at spacing between 15.2 to 22.9m (50 to 75ft), this is
especially important on towers taller than 45.7m (150ft).
Ground wire should be
installed without drip
loops and pointing down
towards the ground.
MGB Grounding system
GPS
Rx
GPS Rx Module mounting bracket
Lightning Protection Unit
(LPU)
PIDU
To ODU/LPU
on mast