Extron Electronics CAT 5 Transmitters - Manual (Page 8)

CAT 5 Transmitters • Installation and Operation CAT 5 Transmitters • Installation and Operation
Installation and Operation, cont’d
2-5 2-4
Grounding the transmitter
In certain conditions, RGB and computer video transmitters
may need to be grounded to ensure the video and audio are not
degraded. Grounding may be required for the CAT 5 T 15HD,
CAT 5 T 15HD AV, and CAT 5 T BNC if all of the following
conditions are true:
• The signal source is a laptop computer.
• No local monitor is connected.
• A local power supply is not being used.
Grounding may also be required if there is no common ground
in the power distribution system.
Indications that grounding may be required include:
• The receiver’s Power LED is lit amber when a connection
is made to the transmitter.
• The receiver is in auto mode and the receiver’s Manual/
Auto LED flashes.
• The receiver is in manual mode and an image appears
only when the Peaking adjustment is at the minimum
level. Additionally, the image may appear overpeaked
with horizontal streaking to the right of displayed
information.
• No audio, or distorted and noisy audio, is heard.
The transmitter can be gounded using any of the following
methods:
• Connect a local 15V power supply to the transmitter.
• Use STP rather than UTP cable and connectors.
• Use a 3.5 mm captive screw connector to connect a
ground wire between the return pin on the power
connector (figure 2-2) and a grounding point near the
transmitter, such as a grounded power outlet or an
equipment rack.
Return
Grounding point
near transmitter
N/C
Figure 2-2 — Grounding the transmitter
Input cabling
Computer video and PC audio
The CAT 5 T 15HD AV (figure 2-3) and the CAT 5 T 15HD A
(figure 2-4) both accept and transmit computer video and PC
audio. These transmitters can also accommodate component
video, S-video, or composite video if input on the R, G, and B
pins of the 15HD connector using an Extron SY VGA cable, part
#26-173-01.
PC
H-SHIFT
CAT 5 T 15HD AV
AUDIO
VIDEO AUDIO
L R
BUFFERED COMPUTER
INPUT LOCAL MONITOR
ID PIN 4 ID PIN 11
POWER
15V .5A DC
DDSP SP ARE
OUTPUTS
AV COMPUTER
2 6 1 4 3
11 9 10 5
7
Figure 2-3 — Installation features, CAT 5 T 15HD AV
H-SHIFT
CAT 5 T 15HD A
AUDIO
DDSP SP ARE
BUFFERED COMPUTER
INPUT LOCAL MONITOR
OUTPUT
ID PIN 4 ID PIN 11
POWER 15V .5A DC
2 1 4 3
11 9 5
Figure 2-4 — Installation features, CAT 5 T 15HD A
Transmission of component video, S-video, or composite video
requires that internal jumpers be reconfigured. See Jumpers in
this chapter.
1 Computer Input connector — Connect computer video to this
15HD female connector.
Input only sync signals, no video signals, on the sync
pins, 13 and 14.