SBCA Safety & Regulatory Compliance 3 — Questions and Answers
Question 1: What NEC code section addresses grounding and bonding requirements for satellite dish installations on residential structures?
- NEC Article 250 — Grounding and Bonding
- NEC Article 800 — Communications Circuits
- NEC Article 820 — Community Antenna Television (Correct answer)
- NEC Article 830 — Network-Powered Broadband
Correct answer: NEC Article 820 — Community Antenna Television
NEC Article 820 specifically governs coaxial cable systems including CATV and satellite dish installations, including grounding at the point of entry.
Question 2: Under FCC Part 25, what is the maximum antenna pointing error generally allowed for a geostationary satellite earth station to maintain proper coordination?
- 0.1 degrees
- 0.5 degrees
- 1.0 degree (Correct answer)
- 2.0 degrees
Correct answer: 1.0 degree
FCC Part 25 typically allows up to 1.0 degree of pointing error for earth station antennas, beyond which interference to adjacent satellites may occur.
Question 3: A technician is asked to install a very small aperture terminal (VSAT) that will transmit. Which FCC authorization is required before the earth station can go on-air?
- A Blanket Earth Station License or individual earth station authorization under FCC Part 25 (Correct answer)
- A general business license from the FCC
- Only ITU coordination — no FCC filing needed for VSAT
- An amateur radio license if operating below 3 GHz
Correct answer: A Blanket Earth Station License or individual earth station authorization under FCC Part 25
Transmitting VSAT terminals require FCC Part 25 licensing, either as individually licensed stations or under a blanket earth station license held by a network operator.
Question 4: What is the primary purpose of the FCC's 'quiet zones' near facilities such as the National Radio Astronomy Observatory (NRAO)?
- To reserve spectrum for government use only
- To restrict RF emissions that could interfere with sensitive scientific radio receivers (Correct answer)
- To limit commercial satellite transmissions to nighttime hours
- To protect wildlife from RF radiation
Correct answer: To restrict RF emissions that could interfere with sensitive scientific radio receivers
FCC quiet zones restrict RF transmissions in areas surrounding sensitive scientific installations to prevent interference with radio telescopes and other research receivers.
Question 5: When performing a risk assessment for a rooftop satellite installation, which fall protection standard from OSHA applies to work at heights of 6 feet or more in the construction industry?
- 29 CFR 1910.23 — Walking-Working Surfaces
- 29 CFR 1926.502 — Fall Protection Systems (Correct answer)
- 29 CFR 1926.450 — Scaffolding
- 29 CFR 1910.140 — Personal Fall Protection
Correct answer: 29 CFR 1926.502 — Fall Protection Systems
OSHA 29 CFR 1926.502 requires fall protection for construction workers at heights of 6 feet or more and specifies guardrail, safety net, and personal fall arrest system requirements.
Question 6: What is the significance of the 'rain fade margin' in satellite system link budget calculations from a regulatory compliance perspective?
- It determines the required FCC coordination distance
- It ensures the system maintains acceptable signal quality and avoids exceeding power limits when compensating for atmospheric attenuation (Correct answer)
- It is used to calculate tower lighting requirements
- It defines the exclusion zone radius around the antenna
Correct answer: It ensures the system maintains acceptable signal quality and avoids exceeding power limits when compensating for atmospheric attenuation
The rain fade margin ensures link reliability; operators must not exceed licensed EIRP limits even when automatically increasing power to compensate for rain attenuation.
Question 7: Which international body allocates radio frequency spectrum used by satellite systems on a global basis?
- The FCC
- The International Telecommunication Union (ITU) (Correct answer)
- The United Nations General Assembly
- The World Trade Organization (WTO)
Correct answer: The International Telecommunication Union (ITU)
The International Telecommunication Union (ITU) coordinates global spectrum allocation through its Radio Regulations and the Radio Communication Sector (ITU-R).
SBCA Safety & Regulatory Compliance 3
What NEC code section addresses grounding and bonding requirements for satellite dish installations on residential structures?