SBCA Installation Practices & Standards 3

Question 1

Which tool is used to verify that a satellite dish is correctly aimed in azimuth and elevation during installation?

Accepted Answer

Spectrum analyzer with satellite signal meter

Answer

A spectrum analyzer or satellite signal meter displays signal strength and quality in real time, allowing precise azimuth and elevation adjustment.

Question 2

What is the purpose of a diplexer used in satellite dish installations?

Accepted Answer

Combine or separate satellite and off-air antenna signals on a single coax

Answer

A diplexer allows satellite IF signals and off-air (UHF/VHF) signals to share a single coaxial cable run without interference.

Question 3

When installing a satellite dish on a non-penetrating roof mount (NPRM), what is the primary structural concern?

Accepted Answer

Wind load calculations and ballast weight requirements

Answer

NPRMs rely entirely on ballast weight to resist wind uplift, so correct calculation of wind load and required ballast is critical for safety.

Question 4

What is the standard intermediate frequency (IF) range output from an LNB to the satellite receiver?

Accepted Answer

950–2150 MHz

Answer

LNBs downconvert satellite signals to the 950–2150 MHz IF range, which can be transmitted over standard RG-6 coaxial cable to the receiver.

Question 5

During a satellite dish installation, a technician measures the signal-to-noise ratio (SNR). What does a low SNR indicate?

Accepted Answer

There is excessive noise relative to the desired signal

Answer

A low SNR means the noise floor is high relative to the satellite signal, typically caused by misalignment, obstructions, or faulty equipment.

(SBCA) Satellite Broadcasting and Communications Association Certification Practice Test