We often heard people say which radio has the highest Tx power, since QPSK always give the highest power, so what people really say is what is the maximum Tx power of a radio working at QPSK mode.
But how many links really works on QPSK mode? In most of the link deployed today, radio works on 256QAM or even higher, so it is more critical to undertsand what is the Tx power on higher modulation mode.
Here is an example between PTP820 and PTP800.
Maximum Tx Power
@11 GHz
PTP820
PTP800
2048 QAM
21
n/a
1024 QAM Strong
23
n/a
1024 QAM Light
23
n/a
512 QAM
24
n/a
256 QAM
25
19
128 QAM
25
21
64 QAM
25
21
32 QAM
25
26
16 QAM
26
26
8 PSK
27
n/a
QPSK
27
28
You can see PTP800 has higher power on QPSK, 1 dB better than PTP820. But @256 QAM, the PTP820 is 6 dB better than PTP800.
So which radio you think has higher power for you?
i would also to say that the important figure it is the system gain (in each modulations), it reppresent even better than PTx the quality of the product prefromances