User's Guide Part 1

Chapter 3: System planning Link planning
Calculation example
Suppose that the link characteristics are:
• PTP 700 variant = Lite
• Link Symmetry = 1:1
• Link Mode Optimization = TDM
• Modulation Mode = 64QAM 0.92 Dual
• Channel Bandwidth = 10 MHz
• Link Range = 60 km
The calculation procedure for this example is as follows:
1
Use Table 93 to look up the data throughput capacity rates:
Tx = 21 Mbits/s
Rx = 21 Mbits/s
Aggregated = 42 Mbits/s
2
Use Figure 77 to look up the Throughput Factor for 1:1, TDM, 10 MHz, Lite and Link Range 60
km. The factor is 0.86.
3
Multiply the rates from Step 1 by the Throughput Factor from Step 2 to give the throughput
capacity of the link:
Tx = 18.1 Mbits/s
Rx = 18.1 Mbits/s
Aggregated = 36.1 Mbits/s
Page 3-28