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Which parameter quantifies the power radiated by an antenna in a particular direction with respect to an isotropic source?
a. Antenna gain
b. Effective Isotropic Radiated Power (EIRP)
c. Transmit power
d. Path loss
Answer: b. Effective Isotropic Radiated Power (EIRP)study-ccnp+1
What is the formula for calculating EIRP in a system?
a. EIRP = Tx Power + Cable Loss – Antenna Gain
b. EIRP = Tx Power + Antenna Gain – Cable Loss
c. EIRP = Tx Power – Antenna Gain + Cable Loss
d. EIRP = Tx Power + Cable Loss + Antenna Gain
Answer: b. EIRP = Tx Power + Antenna Gain – Cable Lossthethingsnetwork+2
Which unit is EIRP usually expressed in?
a. Watts
b. dBm
c. Volts
d. Hz
Answer: b. dBmcdt21+1
EIRP is used to ensure compliance with:
a. Hardware compatibility standards
b. Regulatory limits for radiated power
c. Network licensing agreements
d. User interface requirements
Answer: b. Regulatory limits for radiated powerwraycastle+2
If transmitter power is 15 dBm, antenna gain is 5 dBi, and cable loss is 2 dB, what is the EIRP?
a. 12 dBm
b. 18 dBm
c. 17 dBm
d. 10 dBm
Answer: c. 18 dBmstudy-ccnp+1
To convert ERP (Effective Radiated Power) in dBm to EIRP, which value is added?
a. 1.14
b. 2.14
c. 3.14
d. 4.14
Answer: b. 2.14rfwireless-world+2
What does the term “isotropic” refer to in EIRP?
a. Real antenna
b. Ideal antenna radiating equally in all directions
c. Half-wave dipole
d. Loop antenna
Answer: b. Ideal antenna radiating equally in all directionsrfwireless-world+1
What is the main practical importance of EIRP in wireless network design?
a. Client authentication
b. Ensuring network coverage and controlling interference
c. Data rate calculation
d. Firmware upgradation
Answer: b. Ensuring network coverage and controlling interferenceiptel+1
EIRP can be increased by:
a. Increasing cable loss
b. Increasing antenna gain
c. Increasing receiver sensitivity
d. Reducing transmission frequency
Answer: b. Increasing antenna gainiptel+1
If transmitter power is 20 dBm, antenna gain is 3 dBi, and cable loss is 7 dB, what is the EIRP?
a. 10 dBm
b. 16 dBm
c. 20 dBm
d. 23 dBm
Answer: b. 16 dBmthethingsnetwork
What regulation commonly limits EIRP in wireless devices?
a. IEEE 802.3
b. Federal Communications Commission (FCC)
c. ISO 27001
d. PCI DSS
Answer: b. Federal Communications Commission (FCC)rfwireless-world+1
In satellite communication, EIRP is critical for?
a. Uplink signal strength
b. Downlink data encryption
c. RF cabling length
d. Battery backup time
Answer: a. Uplink signal strengtheasyexamnotes
What is the most significant effect of exceeding EIRP regulatory limits?
a. Reduced throughput
b. Regulatory violations and potential interference
c. Lost packets
d. Increased coverage area
Answer: b. Regulatory violations and potential interferencewraycastle+1
The gain of a dipole antenna in dBi is:
a. 0 dBi
b. 1.14 dBi
c. 2.14 dBi
d. 5 dBi
Answer: c. 2.14 dBicdt21+1
Which method does not affect EIRP directly?
a. Changing antenna type
b. Adjusting transmitter output power
c. Modifying receiver sensitivity
d. Reducing cable length
Answer: c. Modifying receiver sensitivitystudy-ccnp+1
Which parameter does NOT appear in the EIRP formula?
a. Transmitter power
b. Antenna gain
c. Cable loss
d. Modulation index
Answer: d. Modulation indexiptel+2
If an ERP is 10 dBm, what is the corresponding EIRP?
a. 7.86 dBm
b. 10 dBm
c. 12.15 dBm
d. 13.15 dBm
Answer: c. 12.15 dBmrfwireless-world+1
The reference point for EIRP calculations is:
a. Half-wave dipole antenna
b. Ground plane antenna
c. Isotropic radiator
d. Loop antenna
Answer: c. Isotropic radiatorrfwireless-world+1
Cable loss in EIRP calculations is:
a. Added to transmitter power
b. Subtracted from sum of transmitter power and antenna gain
c. Ignored
d. Expressed in Hz
Answer: b. Subtracted from sum of transmitter power and antenna gainthethingsnetwork+1
What does EIRP stand for?
a. Effective Integrated Radio Power
b. Effective Isotropic Radiated Power
c. Electromagnetic Isotropic Relay Power
d. Edge Integrated Relay Point
Answer: b. Effective Isotropic Radiated Powercareerride+2
In what unit is antenna gain generally specified in EIRP calculations?
a. dBd
b. dBi
c. mW
d. W
Answer: b. dBirfwireless-world+2
What is the maximum allowed EIRP for Wi-Fi in the UNII-1 5150-5250 MHz band in Australia?
a. 10 dBm
b. 23 dBm
c. 36 dBm
d. 30 dBm
Answer: b. 23 dBmiptel
What type of antenna is used as a reference for ERP?
a. Isotropic
b. Loop
c. Half-wave dipole
d. Yagi-Uda
Answer: c. Half-wave dipolerfwireless-world+1
If a transmitter has a power of 10 W and an antenna gain of 10 dBi, with cable loss of 2 dB, what is the EIRP in dBW? (1W = 0 dBW)
a. 9 dBW
b. 8 dBW
c. 10 dBW
d. 18 dBW
Answer: a. 9 dBWtestbook+1
What is the cable loss if the transmitter is 20 dBm, antenna gain is 7 dBi, and EIRP achieved is 25 dBm?
a. 1 dB
b. 2 dB
c. 3 dB
d. 4 dB
Answer: b. 2 dBwraycastle+1
Which device typically operates under strict EIRP regulatory limits for electromagnetic field exposure?
a. Mobile phones
b. Microwave oven
c. Desktop PC
d. Optical fiber router
Answer: a. Mobile phonesarxiv
Dynamic control of EIRP is important for what reason in modern cellular networks?
a. Reducing packet loss
b. Compliance with EMF regulations
c. Minimizing hardware cost
d. Simplifying device management
Answer: b. Compliance with EMF regulationsarxiv
If ERP is 50 dBm, what is EIRP?
a. 47.85 dBm
b. 50 dBm
c. 52.15 dBm
d. 60 dBm
Answer: c. 52.15 dBmrfwireless-world+1
Which of the following formula gives EIRP in dBm if you know transmitter output in watts and antenna gain?
a. EIRP = 10 log (Power in watts) + Antenna gain
b. EIRP = Power in dB + Cable length
c. EIRP = 20 log (Power in watts) – Antenna gain
d. EIRP = Power in dBW + Antenna loss
Answer: a. EIRP = 10 log (Power in watts) + Antenna gaintestbook
What is the significance of EIRP in link budget analysis?
a. It estimates uplink delay
b. It determines the available power margin
c. It specifies modulation type
d. It sets transmission frequency
Answer: b. It determines the available power margineasyexamnotes
Increasing which parameter will reduce EIRP, all else being constant?
a. Transmitter power
b. Antenna gain
c. Cable loss
d. Frequency
Answer: c. Cable lossstudy-ccnp+1
Why do regulatory bodies set EIRP limits?
a. To maximize data rates
b. To prevent electromagnetic interference
c. To mandate encryption
d. To enable color encoding
Answer: b. To prevent electromagnetic interferencewraycastle+1
Which EIRP value is typically higher for the same setup: EIRP or ERP?
a. ERP is higher
b. EIRP is higher
c. Both are always the same
d. Can’t be determined
Answer: b. EIRP is higherrfwireless-world
What effect does adding a signal booster (amplifier) have on a wireless link’s EIRP?
a. Decreases EIRP
b. No effect on EIRP
c. Can increase EIRP above compliance
d. Reduces antenna gain
Answer: c. Can increase EIRP above compliancewraycastle
The gain difference between ERP and EIRP stems from:
a. Different reference antennas
b. Different modulation techniques
c. Varying transmitter power units
d. Frequency selection
Answer: a. Different reference antennasrfwireless-world+1
What type of emission control is enabled by preemptively limiting EIRP in cellular networks?
a. Packet loss mitigation
b. EMF exposure compliance
c. Encryption management
d. Power supply regulation
Answer: b. EMF exposure compliancearxiv
In EIRP calculations, if the antenna gain is specified as 6 dBd, what is its equivalent in dBi?
a. 3.86 dBi
b. 6 dBi
c. 4.14 dBi
d. 8.14 dBi
Answer: d. 8.14 dBicdt21+1
If a Wi-Fi access point has 100 mW transmit power and a 3 dBi antenna gain, what is the approximate EIRP in dBm? (1 mW = 0 dBm)
a. 15 dBm
b. 16 dBm
c. 20 dBm
d. 23 dBm
Answer: d. 23 dBmiptel
For an EIRP limit of 36 dBm, what is the maximum permitted for ISM band (5725-5875 MHz) Wi-Fi in Australia?
a. 36 dBm
b. 23 dBm
c. 30 dBm
d. 40 dBm
Answer: a. 36 dBmiptel
If the transmitter output is increased while keeping antenna gain and cable losses unchanged, what happens to EIRP?
a. Increases
b. Decreases
c. Remains same
d. Depends on modulation
Answer: a. Increasesstudy-ccnp+1
The most common use case for EIRP calculation is:
a. Determining cable type
b. Checking compliance with wireless transmission laws
c. Identifying service providers
d. Selecting batteries
Answer: b. Checking compliance with wireless transmission lawswraycastle+2
Which of the following does NOT contribute to EIRP?
a. Transmitter power
b. Antenna gain
c. Cable resistance
d. Modulation bandwidth
Answer: d. Modulation bandwidthcdt21+2
For accurate EIRP measurement, which factor must be measured at the antenna output?
a. Frequency deviation
b. Effective radiated power
c. True transmitted power after all losses
d. Input current
Answer: c. True transmitted power after all lossescdt21+1
In what way does EIRP help minimize interference in urban environments?
a. By reducing cable length
b. By proper EIRP planning based on regulation
c. By increasing antenna height only
d. By selecting low-cost radios
Answer: b. By proper EIRP planning based on regulationwraycastle
The relationship between EIRP (dBm) and ERP (dBm) is:
a. ERP = EIRP + 2.14
b. EIRP = ERP + 2.14
c. EIRP = ERP – 2.14
d. EIRP = ERP × 2.14
Answer: b. EIRP = ERP + 2.14rfwireless-world+1
What is an isotropic radiator in EIRP context?
a. Theoretical antenna radiating uniformly in all directions
b. Loop antenna for directional coverage
c. Ground-based monopole antenna
d. Antenna with minimum resistance
Answer: a. Theoretical antenna radiating uniformly in all directionsstudy-ccnp+1
Which real-world technique can be used to enhance EIRP in a network?
a. Use of directional antennas
b. Reduction of transmission power
c. Use of outdated cables
d. Decrease in antenna gain
Answer: a. Use of directional antennaswraycastle
What is the outcome if EIRP is set too high in a Wi-Fi deployment?
a. Improved security
b. Increased coverage with possible regulatory infringement
c. Reduced coverage
d. Lower throughput
Answer: b. Increased coverage with possible regulatory infringementiptel+1
What would be the EIRP if transmitter output is 5W and antenna gain is 45.2 dB?
a. 38.1 dB
b. 45.2 dB
c. 52.1 dB
d. 50.0 dB
Answer: c. 52.1 dBtestbook
Which summarizes the main role of EIRP in networking?
a. Qualifying encryption strength
b. Managing the power radiated from an antenna for compliance and optimal performance
c. Regulating packet size
d. Enabling auto-configuration
Answer: b. Managing the power radiated from an antenna for compliance and optimal performancestudy-ccnp+2

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