Deep Dive: G8A13
The correct answer is C: The sum of transmit power and antenna gains minus system losses as seen at the receiver. What a link budget is the sum of transmit power and antenna gains minus system losses as seen at the receiver. Link budget calculates the total signal power available at the receiver. For amateur radio operators, this helps predict communication range. Understanding this helps when planning radio links.
Why Other Answers Are Wrong
Option A: Incorrect. Link budget isn't financial costs - it's a technical calculation of signal power, not money. Financial costs aren't link budget. Option B: Incorrect. Link budget isn't just antenna gains minus losses - it includes transmit power too. Transmit power is part of link budget. Option D: Incorrect. Link budget isn't the difference between transmit power and receiver sensitivity - it's the sum of power and gains minus losses. Difference isn't the calculation.
Exam Tip
Link budget = sum of transmit power and antenna gains minus system losses. Think 'L'ink 'B'udget = 'L'ooks at 'B'oth ends (transmit + receive) minus losses. Calculates total signal power available at receiver. Not financial costs, not just gains-losses, not power-sensitivity difference - just power+gains-losses.
Memory Aid
Link budget = sum of transmit power and antenna gains minus system losses. Think 'L'ink 'B'udget = 'L'ooks at 'B'oth ends. Calculates total signal power available at receiver. Helps predict communication range.
Real-World Example
A link budget: Transmit power = 100W, transmit antenna gain = 10 dBi, receive antenna gain = 10 dBi, system losses = 3 dB. Link budget = 100W + 10 dBi + 10 dBi - 3 dB = total signal power at receiver. This helps predict if communication will work. Link budget is the sum of power and gains minus losses.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G8A
Reference: 2023-2027 Question Pool · G8 - Signals and Emissions
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G8A topic.