Which of the below parameters are used in calculating the range - maximum distance - of an outdoor link between two bridges? Choose two.
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A. B. C. D. E.BD.
The parameters that are used in calculating the range of an outdoor link between two bridges are:
B. The bridge transmission power: This is the amount of power that the bridge transmits, and it has a direct impact on the range of the link. The higher the transmission power, the longer the range. However, higher transmission power also means more interference and potential regulatory issues.
D. The modulation type: This refers to the way the radio waves are modulated to carry data. The modulation type has a significant impact on the range of the link, with higher-order modulation types typically having shorter ranges but higher data rates. Factors that affect the modulation type include the distance between the bridges, the frequency of the radio waves, and the strength of the signal.
The other options listed in the question are not directly related to the calculation of the range of the link between the bridges:
A. The cable length between bridge and the connecting switch: This parameter is relevant for indoor links but has no effect on outdoor links. It is not used to calculate the range of an outdoor link.
C. The outside temperature: This parameter can affect the propagation of radio waves, but its effect is typically small compared to other factors such as terrain, foliage, and buildings. It is not directly used to calculate the range of an outdoor link.
E. The length of the antenna: While the antenna length can impact the efficiency of the radio transmission, it is not directly used to calculate the range of an outdoor link. Other antenna factors such as gain and directionality can have a more significant impact on the range of the link.