DHS Systems 1003080, Техническое руководство

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Operation & Maintenance Medium SXGA+ Projection System 0001
Part Number 1006380 0001-5 DHS Systems LLC
This document contains information proprietary to DHS Systems LLC and is intended solely for use by its customers. No portion of this document may be reproduced
for release to a third party without written consent of DHS Systems LLC.
COMMON AUDIO SIGNALS
Microphone Level: Microphone (MIC) level is a nominal signal coming directly from a microphone. Very low, in the
microvolt’s, and requires a preamp with at least 60 dB gain before using with any line-level equipment
Line Level: Line level is a term used to denote the strength of an audio signal used to transmit analog sound
information between audio components such as CD and DVD players. Line level is a st4 dBu or -10dBV
audio level.
Balanced Audio: A balanced audio signal requires two signal wires and one ground/shield wire. The two signal wires
are of inverted polarity to each other. The two inverted signals along with an overall shield rejects outside noise over
long cable distances.
Unbalanced Audio: An unbalanced audio signal requires two wires, one wire is for the +signal and the other wire is
for ground or return. Unbalanced audio works fine for short distances, but is not recommended for long distances
because it is more susceptible to outside noise interferences.
Mono Audio: Mono (Monaural) is a signal channel of sound. Mono is typically relating to a system of transmitting,
recording, or reproducing sound in which one or more sources are connected to a signal channel.
Stereo Audio: Stereo (Stereophonic) sound is the reproduction of sound using two or more independent audio
channels through a symmetrical configuration of loudspeakers in such a way as to create a natural impression of
sound.
COMMON AUDIO CONNECTORS
XLR: The XLR connector is a rugged electrical connector design and the most common XLR is the 3-pin, used mostly
for microphones and other balanced audio connections.
RCA Connector: The RCA jack is a commonly used connector in audio/visual and can be used for both line level
audio and composite video.
1/8” TRS: TRS stands for Tip, Ring & Sleeve and is used to pass stereo audios three signals (left, right and ground)
from a speaker connection to a sound card on a PC.
¼” TRS: Is the original “jack-like plug” and is the same as the 1/8” TRS, except for size.
VIDEO DISTRIBUTION METHODS
HD15: HD15 cables are the most common way of sending computer video from a computer to monitors or display
types.
CAT5: CAT5 or UTP is a typical 8-wire cable is another popular method for sending computer video over long
distances.
Wireless: The wireless transmission of computer video signals is often a packet loss problem as well as the security
concerns attached. Also, band-width limitations reduce the resolutions and frames per second transmitted. Wireless
is not recommended for full motion high resolution video.