# Installation hints ## Antenna Orientation Orientation of the antennas is vital. Ground module has high gain 5 dBi antennas with a vertical plain radiation pattern is \~40 degrees. Therefore, antennas on the ground module should be placed vertically. If you want the system to be less reliant on antenna orientation then antennas should be changed to lower gain antennas (2-5 dBi). They will yield a lower range but will be less dependent on the orientation of antennas. The image below demonstrates the relation between antenna gain, radiation pattern and range: ![](/files/-MTQoCnVffXYJhUL6Fl9) For a solid connection the copter should stay in the blue area. In this example, the range is anywhere in the 2 dB antenna blue circle. 9 dB antenna has a reduced area but a longer range for certain directions. Same rules are applied to antennas on copters, whose antennas are 3 dBi by default and should be placed vertically down (cable from antenna facing up to the sky). Another thing to consider for longer range - ground module should be placed higher off the ground. At least one meter is required but there is a significant difference between 1 meter and 2 meters off the ground; the higher the better! 1.50 - 2.00 meters is recommended. ## Frequencies The system operates at 2.4 GHz, therefore, it's recommended to keep 2.4 GHz band free from other devices. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sky-drones.com/avionics/smartlink/installation-hints.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.