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Maximum Input Power Level

(as a function of attenuation for various power ratings)
Nominal
Attenuation
(dB)
Nominal Power Rating
2 Watts 5 Watts
10 Watts 20 Watts 50 Watts
1 9.724 24.311 48.621 97.242 243.106
2 5.419 13.549 27.097 54.194 135.486
3 4.010 10.024 20.048 40.095 100.238
4 3.323 8.307 16.614 33.229 83.071
5 2.925 7.312 14.625 29.250 73.124
6 2.671 6.677 13.354 26.709 66.772
7 2.499 6.246 12.493 24.985 62.463
8 2.377 5.942 11.883 23.767 59.417
9 2.288 5.720 11.440 22.880 57.201
10 2.222 5.556 11.111 22.222 55.556
11 2.173 5.431 10.863 21.726 54.314
12 2.135 5.337 10.673 21.347 53.367
13 2.106 5.264 10.528 21.055 52.638
14 2.083 5.207 10.415 20.829 52.073
15 2.065 5.163 10.327 20.653 51.633
16 2.052 5.129 10.258 20.515 51.288
17 2.041 5.102 10.204 20.407 51.018
18 2.032 5.081 10.161 20.322 50.805
19 2.025 5.064 10.127 20.255 50.637
20 2.020 5.051 10.101 20.202 50.505
30 2.002 5.005 10.010 20.020 50.050
40 2.000 5.001 10.001 20.002 50.005


Note: Best engineering practices recommend observation of a safety margin (reducing maximum input power level) to account for variation in attenuation due to frequency sensitivity, temperature, etc.