8
Connection Types
The Sherbourn SR-120 offers four types of video
connections (3 Analog and 1 Digital) and 3 types of audio
connections.
Video Connections
Composite Video
Analog composite video signals are transmitted via a single
75-ohm coax cable (typically with yellow or yellow banded
RCA connectors on each end). Composite video inputs or
outputs are present on almost all types of consumer grade
video equipment.
Analog Picture Quality: Poor. This is the lowest quality
discrete cable for a video source and is not recommended.
S-Video
Many midrange and premium video components offer
the option of using S-video connections. The S-video (or
Y/C) cable is terminated at each end with a four-pin DIN
connector. Although it may appear to be a single cable,
internally it has two 75-ohm coax or twisted pair cables
to carry the separate Y (luminance) and C (chrominance)
signals. This is also an analog video signal.
Analog Picture Quality: Fair. The S-video cable is
an improvement over a Composite cable but still not
recommended.
Component Video
Component cables look just like composite cables. The
difference is that, where a composite cable carries the
entire video signal on a single cable, component cables
split the signal to three cables. The signal itself is referred
to as either, Y, Cr, Cb or Y, Pb, Pr. Manufacturers make
connecting these cables easy by color coordinating them.
The tips of the cables and jacks will be red, green and blue.
Most high-end DVD players and HDTV tuners will have
analog component video connections.
Analog Picture Quality: Good. Gives a superior image over
Composite or S-Video connections.
HDMI (up to HDMI 1.3a)
High-Definition Multimedia Interface (HDMI) is an
uncompressed, digital audio/video interface in a single
cable. HDMI supports standard, enhanced, or high-
denition video, plus multi-channel digital audio on a single
cable. It transmits all ATSC HDTV standards and supports
8-channel, 192kHz uncompressed digital audio and all
currently available compressed and uncompressed formats
(such as Dolby Digital, Dolby True HD, Digital Plus, PLIIx
and DTS-HD Master Audio, DTS-HD High Resolution
Audio, DTS Digital Surround ES - Neo:6 - 96/24).
HDMI is the only digital video input and output format
supported by the Sherbourn SR-120. You can connect up to
5 HDMI input devices and one HDMI display device to the
SR-120. The HDMI section of the SR-120 supports 480p
60Hz, 576p 50Hz, 720p 50Hz, 720p 60Hz, 1080i 50Hz,
1080i 60Hz, 1080p 50Hz, and 1080p 60Hz resolutions.
The most common resolutions for the United States are
480, 720 and 1080 at 60Hz. (50Hz resolutions are primarily
used outside of the United States.
The SR-120 is fully PAL and NTSC compliant.
Note: 1080p 24Hz from the input source will get routed
through the SR-120 as 1080p 24Hz but 1080p 24Hz is not
selectable for scaling.
HDMI offers the best overall video quality. Sherbourn
recommends using HDMI as the preferred connection.
Audio Connections
There are two ways to transmit audio signals available
with the SR-120: digital and analog. An analog signal is an
electrical waveform representation of sound, and requires
one connecting cable for each channel. A digital signal
transmits sound as a series of numbers, and requires only
one cable for all channels.
Direct Audio Input Mode
The Direct input mode is a special mode designed for when
you want the input signal to remain as pristine as possible,
and don’t need any processing whatsoever. In this mode, if
the input signal is an analog audio signal, it is routed directly
to the analog outputs with no conversions or processing. If
the input signal is a digital audio signal, it bypasses all the
decoders and equalizers and is routed directly to the output.
