SIERRA VIDEO SYSTEMS
12
Factors Affecting Quality of Results
There are many factors affecting the quality of results when signals are transmitted from a
source to a destination.
Signal cables — Use only the best quality cables to avoid interference and
degraded signal quality and elevated noise levels.
Sockets and connectors of the sources and destinations — Use only the highest
quality, since "zero ohm" connection resistance is the target. Connectors should
also match the required impedance (75 ohm in video) to minimize return loss.
Amplifying circuitry — Must have quality performance when the desired end
result is high linearity, low distortion, and low noise.
Distance between sources and destinations — Plays a major role in the final
result. For long distances (over 15 meters) between sources and destinations,
special measures should be taken to avoid high frequency cable losses. These
measures include using higher quality cables and/or adding line cable equalizing
amplifiers.
Interference from neighboring electrical appliances — These can have an
adverse affect on signal quality. Balanced audio lines are less prone to
interference, but unbalanced audio should be installed away from any main
power lines, electric motors, transmitters, etc. even when the cables are shielded.
CAUTION!
Only an authorized Sierra Video Systems technician can service the switchers. Any user who
makes changes or modifications to the unit without the expressed approval of the manufacturer
will void the warranty
Use the proper AC voltage to supply power to the switcher.
Use only the recommended interconnect cables to connect the switcher to other frames.
