Sierra Video SCP-20 - Manual (Page 10)

SIERRA VIDEO
4
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 technician can service the control panels. 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 to DC adapter to supply power to the unit.
Use only the recommended interconnect cables to connect the control panel to other
frames.