Crestron QM-TX Operation Manual page 11

Crestron QM-TX
Operations Guide – DOC. 6334
Ports
The QM-TX ports are located on the rear panel and are illustrated and described
as follows.
Video and RGB Inputs
Five BNC type connectors are provided for video and RGB input.
Composite video is a type of video signal in which all information – the red,
green, and blue (horizontal and vertical sync) signals are mixed together.
S-video contains two separate components, luminance and chrominance (also
known as Y and C signals respectively). The luminance signal contains
brightness, intensity, and signal timing information. This signal contains all
picture information except for color. The chrominance signal contains only the
color information. You can see the complete black and white image, without the
chrominance, by only feeding the luminance signal into a monitor.
RGB is comprised of three analog video signals: red, green, blue and separate
horizontal and vertical syncs. Most computer monitors use RGB (usually called
VGA, SVGA, XVGA, etc.). RGBHV consists of red (R), green (G), blue (B),
horizontal sync (H) and vertical sync (V). Video sensing occurs on the H,
COMP, and Y connectors. RGsB format is RGB with sync on Green, and RGBS
is RGB with composite sync.
Component video contains three parts. The luminance signal (Y) contains the
black & white (brightness) information in the original RGB signal. The color
difference signal B-Y (P ) contains the blue information, minus the luminance
B
information. The color difference signal R-Y (P
minus the luminance information. The color difference channels (B-Y and R-Y)
are algebraically recombined with the luminance channel to produce a full color
picture, recreating the green information through this mathematical process.
AUDIO (Input)
This 5-pin terminal block connector provides balanced/unbalanced left and
right audio signal input. Balanced audio inputs use (+) and (-) inputs and a
separate shield (ground). Unbalanced audio input uses L and R (+) inputs for
left and right signal and connects (-) to ground connector (G). Maximum line
level is 4 V balanced, 2 V
RMS
Bandwidth is 20 Hz to 20 KHz.
QuickMedia™ Transmitter
) contains the red information
R
unbalanced. Input impedance is 10 K Ohm.
RMS
QuickMedia™ Transmitter: QM-TX • 7