Signal Distribution Flashcards
7 cards from real SBCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Signal Distribution flashcards as text
What is the maximum recommended cable run length for RG-6 coaxial cable in a residential satellite installation before amplification is typically required?
Answer: 150 feet
RG-6 cable runs exceeding approximately 150 feet typically require amplification to compensate for signal loss at satellite frequencies.
Which characteristic of a distribution amplifier is most important for maintaining signal quality in a satellite system?
Answer: Low noise figure
A low noise figure is critical in a distribution amplifier because it determines how much noise the amplifier adds to the signal, directly affecting receiver performance.
In a commercial satellite distribution headend, what does AGC stand for and what does it do?
Answer: Automatic Gain Control — maintains consistent output signal levels
AGC (Automatic Gain Control) automatically adjusts amplifier gain to maintain consistent output signal levels despite variations in input signal strength.
What is the purpose of using a 'home run' wiring topology in satellite signal distribution?
Answer: To run each receiver connection directly to the central distribution point
A home run topology runs individual cables from each receiver location directly back to a central distribution point, providing better signal isolation and troubleshooting capability.
What causes 'intermodulation distortion' in a satellite distribution amplifier?
Answer: Non-linear operation when driven too close to saturation
Intermodulation distortion occurs when an amplifier is driven into non-linear operation near saturation, causing signals to mix and generate spurious frequencies.
In satellite signal distribution, what is the significance of the 'noise floor'?
Answer: It is the level of background noise below which signals cannot be reliably detected
The noise floor represents the background noise level in the system, and signals must be sufficiently above it for receivers to reliably detect and decode them.
Which grounding method is recommended for satellite signal distribution equipment to prevent ground loops?
Answer: All equipment grounded to a single common ground point
All equipment should be grounded to a single common ground point (single-point grounding) to prevent potential differences that cause ground loops and hum interference.