User's Guide Part 2

User Guide: PTP 600 Series Data rate calculations
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
4-101
Example
Suppose that the link characteristics are:
• Product variant = PTP 600 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 described in Procedure 4-2.
Proce
dure 4-2 Example of data rate capacity calculation
1
Use
Table 4-63 to look up the data throughput capacity rates:
• Tx = 41.41 Mbits/s
• Rx = 41.41 Mbits/s
• Both = 82.81 Mbits/s
2
Divide these rates by 2 to give PTP 600 Lite rates:
• Tx = 20.70 Mbits/s
• Rx = 20.70 Mbits/s
• Both = 41.40 Mbits/s
3
Use
Figure 4-38 to look up the Throughput Factor for 1:1, TDM and Link
Range 60 km. The factor is 0.86.
4
Multiply the rates from Step 2 by the Throughput Factor from Step 3 to
give the throughput capacity of the link:
• Tx = 17.80 Mbits/s
• Rx = 17.80 Mbits/s
• Both = 35.60 Mbits/s