AVT 200HD Tuner • Installation 8
Control Connections
Ethernet Connection
When you connect a computer to the AVT 200HD LAN port, it is vital that you use the
correct Ethernet cables, and that they are properly terminated with the correct pinout.
Ethernet links use Category (CAT) 5 or 5e unshielded twisted pair (UTP) cables, terminated
with RJ-45 connectors. Ethernet cables are limited to a length of 328 feet (100 m).
NOTES: • Do not use standard telephone cables. Telephone cables do not support
Ethernet or Fast Ethernet.
• Do not stretch or bend the cables, because this can cause transmission errors.
A cable that is wired as T568A at one end
and T568B at the other (Tx and Rx pairs
reversed) is a "crossover" cable.
A cable that is wired the same at both ends
is called a "straight-through" cable, because
no pin or pair assignments are swapped.
RJ-45
Connector
Insert Twisted
Pair Wires
12345678
Pins: Crossover Cable Straight-through Cable
Pin
1
2
3
4
5
6
7
8
Wire color
White-green
Green
White-orange
Blue
White-blue
Orange
White-brown
Brown
Wire color
T568A T568B
End 1 End 2 End 1 End 2
White-orange
Orange
White-green
Blue
White-blue
Green
White-brown
Brown
Pin
1
2
3
4
5
6
7
8
Wire color
Blue
White-blue
White-brown
Brown
Wire color
T568B
T568B
White-orangeWhite-orange
OrangeOrange
White-greenWhite-green
Blue
White-blue
GreenGreen
White-brown
Brown
Figure 6. RJ-45 Connector and Pinout Tables
The cable that you use depends on your network speed. The tuner supports both
10 Mbps (10Base-T — Ethernet) and 100 Mbps (100Base-T — Fast Ethernet),
half-duplex and full-duplex, Ethernet connections.
• 10Base-T Ethernet requires CAT 3 UTP or STP cable at minimum.
• 100Base-T Fast Ethernet requires CAT 5e UTP or STP cable at minimum.
The Ethernet cable must be properly terminated for your application as either a
crossover or a straight-through cable.
• Crossover cable — Direct connection between the computer and the AVT 200HD
• Patch (straight-through) cable — Connection of the AVT to an Ethernet LAN
Wiring for RS-232 Control
To connect your computer or control system to the AVT RS-232 connector, use an Extron
Universal Control cable (UC50' or UC100'; see “Cables” in the “Reference Information”
section for part numbers) or other female 9-pin-to-bare-wire RS-232 cable.
1. Wire the unterminated end of the RS-232 cable to the 5-pole captive screw connector,
provided with the AVT. Use only the first three pins on the connector, starting from the
left:
a. Connect the transmit wire to the first pin on the left, which plugs into the Tx
(Transmit) port.
b. Connect the receive wire to the second pin, which plugs into the Rx (Receive) port.
c. Connect the ground wire to the third pin, which plugs into the ground port, marked
with _.