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 purpose of a 'tap' in a cable distribution system as opposed to a splitter?
Answer: A tap provides a high-loss port for line extension and a low-loss port for drop connections
A tap provides a high-loss coupled port for individual drop connections while passing the main signal through with minimal loss, allowing line extension to serve multiple locations.
In satellite IF signal distribution, what frequency range is typically distributed through the coaxial cables from the LNB?
Answer: 950-2150 MHz
The LNB converts satellite frequencies down to the intermediate frequency (IF) range of 950-2150 MHz, which is what gets distributed through the coaxial cables to receivers.
What does 'return loss' measure in a satellite distribution component?
Answer: The amount of signal reflected back toward the source due to impedance mismatch
Return loss measures how much of the signal is reflected back toward the source due to impedance mismatches, with higher return loss values indicating better impedance matching.
Which satellite distribution scenario would MOST benefit from using an active multiswitch over a passive one?
Answer: A large commercial hotel with dozens of receiver locations
Large commercial installations with many receivers benefit most from active multiswitches because the built-in amplification compensates for the higher insertion loss of distributing signals to many outputs.
What is 'cross-modulation distortion' in a satellite signal distribution amplifier?
Answer: A form of distortion where the modulation of one signal transfers to another carrier
Cross-modulation distortion occurs when the modulation from one signal is transferred to another carrier due to amplifier non-linearity, degrading signal quality.
When installing a satellite distribution system in a multiple dwelling unit (MDU), what is the primary advantage of a SMATV headend system?
Answer: It provides a central processing point for multiple satellite signals distributed to all units
A SMATV (Satellite Master Antenna Television) headend provides centralized processing of satellite signals that are then distributed throughout an MDU using the building's existing coaxial cable infrastructure.
What is the recommended practice for testing signal levels throughout a satellite distribution system after installation?
Answer: Use a spectrum analyzer or signal level meter at each outlet to verify levels are within spec
Using a spectrum analyzer or signal level meter at every outlet ensures all distribution points are within acceptable signal level specifications before the installation is completed.