I will start a new discussion here talk about how to upgrade an existing PTP800/810 links to PTP820. If you have a deployment today using PTP800 or PTP810, you are welcome to join this discussion.
Obviously, the PTP820 support 2048QAM, which will bring higher capacity compare to PTP800/810 which use 256QAM, but how about system gain and other factors?
I would like to show you a table on 11GHz @ 40MHz first, then we will take a deeper dive on this topic in the next few days.
11GHz @40MHz |
PTP 800 |
PTP 820 S&C |
|||||
Rx Sensitivity |
Tx Power |
System Gain |
Rx Sensitivity |
Tx Power |
System Gain |
Delta |
|
QPSK |
-85.2 |
19 |
104.2 |
-86.0 |
27 |
113.0 |
8.8 |
8 PSK |
-81.6 |
19 |
100.6 |
-80.5 |
27 |
107.5 |
6.9 |
16 QAM |
-79.4 |
19 |
98.4 |
-79.0 |
26 |
105.0 |
6.6 |
32 QAM |
-74.5 |
19 |
93.5 |
-75.5 |
25 |
100.5 |
7.0 |
64 QAM |
-72.4 |
19 |
91.4 |
-72.5 |
25 |
97.5 |
6.1 |
128 QAM |
-70.0 |
19 |
89.0 |
-70.0 |
25 |
95.0 |
6.0 |
256 QAM |
-67.3 |
19 |
86.3 |
-67.5 |
25 |
92.5 |
6.2 |
512 QAM |
N/A |
N/A |
N/A |
-65.0 |
24 |
89.0 |
2.7 |
1024L QAM |
N/A |
N/A |
N/A |
-61.5 |
23 |
84.5 |
-1.8 |
1024H QAM |
N/A |
N/A |
N/A |
-60.5 |
23 |
83.5 |
-2.8 |
2048 QAM |
N/A |
N/A |
N/A |
-57.5 |
21 |
78.5 |
-7.8 |
with +6 dB gain compare to PTP800, customer will see link availability improvement when they swap to PTP820. A good starting point !! more details to be followed.
Allen