300-360 · Question #157
A network engineer is conducting a Layer 1 site survey using a spectrum analyzer. Which four RF sources can be detected? (Choose four.)
The correct answer is A. Bluetooth B. cordless phones C. jammers D. microwave. A Wi-Fi spectrum analyzer such as Metageek Chanalyzer detects any device emitting RF energy in the 2.4 GHz and 5 GHz ISM bands. Bluetooth (A) operates in 2.4 GHz and is a classic interference source. Cordless phones (B) operate in 2.4 GHz or 5.8 GHz bands. RF jammers (C) emit…
Question
A network engineer is conducting a Layer 1 site survey using a spectrum analyzer. Which four RF sources can be detected? (Choose four.)
Options
- ABluetooth
- Bcordless phones
- Cjammers
- Dmicrowave
- EGSM phone
- F3G phone
- Ganalog TV
- Hinfrared
How the community answered
(41 responses)- A93% (38)
- G2% (1)
- H5% (2)
Explanation
A Wi-Fi spectrum analyzer such as Metageek Chanalyzer detects any device emitting RF energy in the 2.4 GHz and 5 GHz ISM bands. Bluetooth (A) operates in 2.4 GHz and is a classic interference source. Cordless phones (B) operate in 2.4 GHz or 5.8 GHz bands. RF jammers (C) emit wideband or narrowband RF energy detectable as noise floor rises. Microwave ovens (D) emit strong 2.4 GHz interference. GSM (E) and 3G (F) phones operate in licensed cellular bands (700 MHz–2100 MHz) outside the ISM bands a Wi-Fi spectrum analyzer monitors. Analog TV (G) uses VHF/UHF frequencies. Infrared (H) is optical, not RF, and is completely invisible to a spectrum analyzer.
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