Overview
Chapt er 1: Product descript ion
1- 6
phn- 2513_004v000 ( Oct 2012)
The main components are:
•
Compact modem unit (CMU)
: The CMU converts data signals between Ethernet
frames and a modulated intermediate frequency (IF) carrier.
•
Outdoor unit (ODU)
: The ODU converts signals between a modulated intermediate
frequency (IF) and radio band frequencies.
•
Indoor RF unit (IRFU)
: The IRFU is an alternative to the ODU. It is installed indoors,
for easier maintenance and security.
•
Antennas and couplers
: Cambium supplies high performance, low profile antennas
for PTP 800 frequency bands in sizes from 0.3 m (1 ft) to 3.7 m (12 ft). These can be
mounted directly to the ODUs, or remotely via waveguide. In 1+1 links, ODUs installed
at the same end can share an antenna through the use of coupler mounting kits.
•
Cabling and lightning protection
:
o
ODU platforms: The CMU is connected to the ODU using CNT-400 coaxial cable (IF
cable), lightning protection units (LPUs) and grounding cables.
o
IRFU platforms: The IRFU is connected to the antenna using flexible waveguide and
premium elliptical waveguide.
The generic term RFU is used in this user guide (and in the web interface) to include the
ODU and IRFU.
Link types
The PTP 800 supports the following link types:
•
1+0 single link
: A 1+0 single link transports Ethernet frames between two sites. Each
link end has one CMU, one RFU and one antenna.
•
1+1 Hot Standby lin
k: A 1+1 Hot Standby link transports Ethernet frames between
two sites and provides protection against single point equipment failure. This is
achieved by the deployment of extra equipment which can automatically take over the
operation of the link in case of equipment failure. Each end of the link requires two
CMUs, either one or two antennas and either two ODUs for outdoor deployments or a
1+1 capable IRFU for indoor deployments. A 1+1 Hot Standby Link can also be
configured to support Receive Spatial Diversity which requires two antennas at each
end of the link. For indoor deployments, a 1+1 Rx SD capable IRFU is required.
•
2+0 two links sharing antennas
: A 2+0 configuration consists of two 1+0 links
between the same two sites, where the antenna at each site is shared between the two
1+0 links. In this user guide and in PTP LINKPlanner, these two links are called link ‘A’
and link ‘B’. Link A and link B must operate on different frequencies and will generally
require separate radio licenses. The antennas in a 2+0 link may be single-polar or
dual-polar.
Summary of Contents for PTP 800 Series
Page 1: ...Cambium PTP 800 Series User Guide System Release 800 05 02 ...
Page 40: ...Licensing requirements About This User Guide 10 phn 2513_004v000 Oct 2012 ...
Page 232: ...Limit of liability Chapter 3 Legal information 3 22 phn 2513_004v000 Oct 2012 ...
Page 322: ...Radiation hazard assessm ent Chapter 4 Reference information 4 90 phn 2513_004v000 Oct 2012 ...
Page 428: ...Replacing IRFU components Chapter 5 Installation 5 106 phn 2513_004v000 Oct 2012 ...
Page 630: ...Using recovery mode Chapter 7 Operation 7 78 phn 2513_004v000 Oct 2012 ...