Overview
This article includes information needed to determine the signal strength necessary to achieve different modulations. This information can also be found within each product's Datasheet, accessible in the Documentation section of the Downloads page by selecting the device of choice from the lefthand menu.
Table of Contents
Introduction
In order to achieve certain modulation, enough signal strength is necessary to keep it stable. Radio sensitivity information is available in our products' datasheets (found in our Downloads page). However, not all users know that the output power also determines what the maximum modulation rate is. Our airFiber 5X is a very powerful device: every dB will matter to get maximum throughput and optimize efficiency.
The following two tables will help with this: the first shows suggested maximum Tx Power and the second, the radio sensitivity depending on channel width and modulation.
Suggested Maximum Tx Power
Suggested Max Tx Power:
Modulation  Output Power 
8x  1920 dBm 
6x  2122 dBm 
4x  2324 dBm 
12x  26 dBm 
1/4x  26 dBm 
From the table above we can conclude that to achieve up to 8x modulation it's highly recommended to use output power up to 20dBm. If higher levels are used, for example 21dBm output power, it's possible that you'd only get up to 6X.
Sensitivity
Radio sensitivity depends on channel width and modulation, for example if you want to get 8X modulation using 30MHz channel you need a received signal strength of 62dBm or better (like 60dBm, 55dBm, etc...).
BW (MHz) 
Rate 
RX Power (dBm) 
50 
8x 
60 
50 
6x 
67 
50 
4x 
74 
50 
2x 
81 
50 
1x 
83 



40 
8x 
61 
40 
6x 
68 
40 
4x 
75 
40 
2x 
82 
40 
1x 
84 



30 
8x 
62 
30 
6x 
69 
30 
4x 
76 
30 
2x 
83 
30 
1x 
85 



20 
8x 
64 
20 
6x 
71 
20 
4x 
78 
20 
2x 
85 
20 
1x 
87 



10 
8x 
66 
10 
6x 
74 
10 
4x 
81 
10 
2x 
88 
10 
1x 
90 