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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:
•
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
Ω
/1000 ft.
•
nominal impedance 100–140
Ω
•
22–24 AWG with insulation having a dielectric rating of 300 volts or higher
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.
Figure 2-2. Properly-constructed data cable.
Female XLR Connector
Male XLR Connector
Negative
Shield
Negative
Positive
Содержание Cyberlight
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