7 distance, 8 networking information, 9 lightning protection – Motorola PTP 400 Series User Manual
Page 45: Distance, Networking information, Lightning protection, D in figure 15
43
20
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
22
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
21
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
16
Default
Max Available TX Power (dBm) (license key dependant)
5732 MHz
5734 MHz
5736 MHz
Lower Centre
Frequency
Band Edge
5850 MHz
Band Edge
5725 MHz
Figure 15 - 5.8 GHz Band Edge TX Power Reduction (Region Code 1 Only)
5.7 Distance
The PTP 400 Series Bridge will operate at ranges from 100 m (330 feet) to 200 km (124
miles), within four modes 0-5km, 0-40km, 0-100km and 0-200km. Operation of the system will
depend on obstacles in the path between the units. Operation at 40 km (25 miles) or above
will require a near line-of-sight path. Operation at 100m (330 feet) could be achieved with one
unit totally obscured from the other unit, but with the penalty of transmitting at higher power in
a non-optimal direction, thereby increasing interference in the band. This subject is covered in
more detail in section 6.1.3 “Path Loss Considerations“.
5.8 Networking
Information
The PTP 400 Series Bridge operates as a transparent Ethernet bridge. Each unit requires an
IP address. This IP address is for management purposes only and it plays no part in the
operation of the system. IP addresses are assigned during initial configuration as described in
section 7.2 “Installation Procedure”.
5.9 Lightning
Protection
The amount of lightning protection is dependent on regulatory requirements and the end user
requirements. The standard ODU for the PTP 400 Series Bridge is fitted with surge limiting
circuits and other features to minimize the risk of damage due to nearby lightning strikes.
These standard features may require some additional equipment to be configured as part of
the system installation to be fully effective. Motorola recommends the use of screened cable
and surge arrestor to protect connected equipment from nearby strikes.
The PTP 400 Series Bridge is not designed to survive direct lightning strikes. For this reason
the unit should not be installed as the highest point in a localized area, unless specific
precautions are taken. See section 11 “Lightning Protection”.