What is the antenna cable loss for AP1?

What is the antenna cable loss for AP1?

• A. 2 dB
• B. 3 dB
• C. 4 dB
• D. 5 dB

Answer: (C)

Antenna cable loss is the RF loss that occurs as the signal travels from the radio through the feed cable to the antenna (and affects the receive path too). This loss reduces the power that actually leaves the AP's antenna and also reduces the signal that arrives at the receiver, so it must be included in link-budget calculations. For AP1, the documented antenna cable assembly specifies 4 dB of loss. That means the RF energy seen at the air from the AP is reduced by 4 dB due to the coax and connectors, and the same 4 dB plays into the receive path when signals come in. In practical terms, if the AP’s transmitter power is P, the effective radiated power is P minus 4 dB, which is essential to determine coverage and performance. That’s why 4 dB is the correct value.

Antenna cable loss is the RF loss that occurs as the signal travels from the radio through the feed cable to the antenna (and affects the receive path too). This loss reduces the power that actually leaves the AP's antenna and also reduces the signal that arrives at the receiver, so it must be included in link-budget calculations.

For AP1, the documented antenna cable assembly specifies 4 dB of loss. That means the RF energy seen at the air from the AP is reduced by 4 dB due to the coax and connectors, and the same 4 dB plays into the receive path when signals come in. In practical terms, if the AP’s transmitter power is P, the effective radiated power is P minus 4 dB, which is essential to determine coverage and performance. That’s why 4 dB is the correct value.