Obtaining Cabling And Terminators; Figure 2-2. Properly-Constructed Data Cable; Constructing Cabling - High End Systems Cyberlight User Manual

Obtaining Cabling and Terminators

There are two main types of cabling you can use: microphone cable and data-grade cable.
Although pin-compatible microphone cable is suitable for small-scale designs, data cable is
recommended, especially for longer cable runs. Data cable is designed to carry a higher-quality
signal with less susceptibility to electromagnetic interference.
The cable you use should have the characteristics listed below:
For example, Belden 9841 data-grade cabling meets specifications for EIA RS-485 applications
and is highly recommended for use with Cyberlight.

Constructing Cabling

Follow the instructions in this section if you need to construct cabling. You should construct cables
using shielded, two-conductor cable with a male 3-pin XLR connector at one end and a female 3-
pin XLR connector on the other end. Pinouts for both male and female XLR connectors are shown
in Figure 2-2.
2-6 Cyberlight User Manual
• 2-conductor twisted pair plus a shield
• maximum capacitance between conductors - 30 pF/ft.
• maximum capacitance between conductor and shield - 55 pF/ft.
• maximum resistance of 20 /1000 ft.
• nominal impedance 100–140
• 22–24 AWG with insulation having a dielectric rating of 300 volts or higher
Negative
Female XLR Connector

Figure 2-2. Properly-constructed data cable.

Shield
Positive
Male XLR Connector
Negative