RGB 400 Series • Installation and Operation
RGB 400 Series • Installation and Operation
Installation and Operation, cont’d
2-15
Cabling RCA connectors
For composite video, solder the center conductor of a
coaxial cable to the central solder cup of the RCA connector.
Solder the cable’s shield to the grounded grounding tab.
See the leftmost and center illustrations below.
Attaching coaxial and twisted-pair cables to
RCA connectors
For audio, solder the signal wire of a shielded twisted-pair
cable to the central solder cup of the RCA connector. Solder
the ground wire to the grounded tab, as shown above at right.
Connecting shields
Multiconductor cables such as Extron’s Install Plenum bulk
cable contain several braided and foil shields. At the
interface end of the cable, the outer braided and foil
shields should be connected to the grounded metal wall
box (or to a grounding wire if a metal wall box is not used).
The wires that make up the braided shield can be
unbraided, then twisted together to form a large, multi-
strand wire that can be folded back under the wall box
cable clamp or attached to the metal wall box with a screw.
See the illustration below.
To prevent short circuits, the outer foil shield
can be cut back to the point where the cable
exits the cable clamp. Both the braided and foil
shields should be connected to an equipment
ground at the other end of the cable.
Grounding outer braided and foil shields
Shield
Center
Conductor
RCA ConnectorCoaxial Cable Twisted Pair
Central Solder
Cup
Grounding Tab
Metal Wall Box
Screw
Braided Shield
Install Cable
Foil Shield
Cable Clamp
2-14
#4-40 Nut w/Captive
Washer
RGB 408 (Up to 4 Plates)
Adapter Plate
INPUT
AUTO POWER
75 Ohm
H. SHIFT
HIGH Z
AUDIO
RGB 408
Installing optional adapter plates
Cabling and connections
Attaching cables to pass-through connectors
The RGB 404 provides pass-through connectors for
composite video, S-video, RJ-45 network These connectors
are mounted on the faceplate. The RJ-45 cable can be
plugged in from the back. Coaxial cables and/or twisted
pair wires must be soldered to the back side of the S-video
and RCA connectors, as described in this section.
Optional adapter plates with various types and
combinations of pass-through audio and video connectors
are available for the RGB 408. Many adapter plates also
require cables and wires to be soldered to the rear
connectors.
Cabling S-video connectors
The illustration below identifies the S-video connector
signal leads. For the RGB 404, splice and solder the four
wires from this connector
to user-supplied coaxial
cables. Insulate the
soldered connections to
prevent shorts. You can
also use the connector’s
shield tabs for
chrominance and
luminance ground tie
points.
S-video connector wiring diagram
Chrominance
signal
Luminance
signal
Chrominance
ground
Luminance
ground
Red
Yellow
Green
Black
Shield tab