Sympodium IM–150 Installation Guide
9
X-Port 30 Unit Cable Specifications and Recommendations
The Sympodium IM-150 module comes with:
•
a
6'
(1.8 m)
RGB video cable, with DVI-I/RGB connector for the Sympodium IM-150
console and HD DB15M connector for the X-Port 30 unit
•
a
6'
(1.8 m)
DB9F/DB9M RS-232 serial cable
•
an 18V DC power supply for the Sympodium IM-150 console
•
a 12V DC power supply for the X-Port 30 unit
However, to integrate the Sympodium IM-150 module, and specifically the X-Port 30 unit, with
the other equipment in your room, you’ll need to supply additional cabling. For your integration
to work correctly, use high-quality cables, which allow for optimum performance.
The following pages provide specific cabling recommendations to assist with your integration.
RGB Video Cables
More than any other computer peripheral, the video display needs the best shielded cables
you can provide. Fluorescent lights and power cords can cause interference and loss of color
and resolution. Without a well-shielded, high-quality cable, you’ll compromise the visual quality
displayed on the screen.
For example, triple-shielded RGB cables have individual RGB color signal conductors that are
coaxially shielded. Outer foil and braided shielding encase all the wires in the cable to ensure
that a monitor with a 50'
(15 m)
video cable will still receive a high-quality signal.
You can extend the DVI-I/RGB cable with a high-quality HD DB15 (M/F) video cable
extension, although the total cable length shouldn't exceed 50'
(15 m)
. Use a cable with gold-
plated copper contacts for maximum conductivity. These cables are designed to support high-
speed, high-resolution imaging.
Any RGB cables you use should have these specifications:
•
3 or 5 coaxial conductors (3 for RGB, plus 2 for H and V, if applicable)
•
nominal impedance: 75 ohms
•
nominal capacitance: 17.3 picofarads/ft.
•
nominal velocity of propagation: 78%
•
nominal attenuation:
2.2 MHz
0.8 db/100 ft.
5 MHz
1.3 db/100 ft.
10 MHz
1.8 db/100 ft.
30 MHz
3.1 db/100 ft.
50 MHz
3.9 db/100 ft.
100 MHz
5.4 db/100 ft.
•
nominal shield DC resistance: 8.6 ohms/1000 ft.
•
nominal conductor DC resistance: 41.5 ohms/1000 ft.
•
structural return loss: 25 dB minimum from 10 MHz to 40 MHz
•
less than 50'
(15 m)
in length
NOTE:
The cables don’t need to support monitor bits because the X-Port 30 unit doesn’t pass
these signals.