What is the link budget of transmit power and receiver sensitivity?

Detailed Answer

Link budget = transmit power + antenna gain − free-space loss − obstacle loss − receiver sensitivity margin. Taking the LDER LD series as an example: 10mW (10dBm) + antenna gain 2dBi − free-space loss (about 92dB at 470MHz over 200 m) − receiver sensitivity -110dBm gives a link budget margin of about 30dB, enough to overcome typical environmental losses. The larger the link budget, the more reliable the communication. When buying, use the link budget to evaluate the actual communication margin.