User guide
Canopy
®
OFDM Backhaul Solutions
Backhaul Solutions for the Most Challenging Locations and Applications
Canopy 150/300 Mbps Backhaul Aggregate Ethernet Throughput Rate
The equipment capability of the 150/300 Mbps Backhaul is given in Table 3. It gives the Ethernet
throughput rate vs. link loss for the Canopy 150/300 Mbps Backhaul in all modes. Adaptive modulation
will ensure that the highest throughput that can be achieved instantaneously will be obtained taking
account of propagation and interference. When the link has been installed, the Status Page on the
management interface provides information about the link loss currently measured by the equipment both
instantaneously and averaged. The averaged value will require maximum seasonal fading to be added
and then the radio reliability of the link can be computed.
Modulation Mode /
Payload Type
Maximum Aggregate Data Rate
1
(Mbit/s)
Threshold
Value
2
(dBm)
Output
Power
3
(dBm)
Maximum
Link Loss
4
(dB)
150 Mbps BH 300 Mbps BH
256QAM 0.81 dual 150.1 300.2 -59.1 +18 124.1
64QAM 0.92 dual 126.5 252.9 -62.0 +18 127.0
64QAM 0.75 dual 103.4 206.7 -68.1 +18 133.1
16QAM 0.87 dual 80.4 160.8 -71.0 +20 138.0
16QAM 0.63 dual 57.8 115.6 -75.2 +22 144.2
16QAM 0.63 single 28.9 57.8 -79.3 +22 148.3
QPSK 0.87 20.1 40.2 -81.6 +23 151.6
QPSK 0.63 14.5 28.9 -84.6 +24 155.6
BPSK 0.63 7.2 14.4 -88.1 +25 160.1
256QAM 0.81 single 75.1 150.1 -64.0 +18 129.0
64QAM 0.92 single 63.2 126.4 -65.9 +18 130.9
64QAM 0.75 single 51.7 103.3 -71.7 +18 136.7
16QAM 0.87 single 40.2 80.4 -74.8 +20 141.8
Table 3: Canopy 150 & 300 Mbps Backhaul
1
Aggregate data rate in IP Traffic mode (running at maximum throughput) for a 1km link length
2
Thresholds for modes other than BPSK are for IP Traffic link optimization AMOD thresholds. When operating in TDM
mode with wayside E1/T1 enabled, thresholds are reduced by 2 - 3dB.
3
The output power shown is for a centre channel in Region 1. The output power will be reduced on the edge channels
and may vary if different region codes are selected.
4
The maximum link loss for each modulation mode is derived from the AMOD threshold for that mode (sensitivity
threshold for rows which are un-shaded) and the maximum Region 1 centre channel output power. The figures assume
integral antennas with 23.5dBi gain are used.
Issue 4, March 2005 Page 14 of 30