Hitron CGNV2, User Manual, Page: 30 / 116

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HITRON CGNV2 USER’S GUIDE
CABLE
In many cases, a number precedes the modulation type (for example 16 QAM ). This
number refers to the complexity of modulation. The higher the number, the more data
can be encoded in each symbol.
NOTE: In modulated signals, each distinct modulated character (for example, each
audible tone produced by a modem for transmission over telephone lines) is
known as a symbol.
Since more information can be represented by a single character, a higher number
indicates a higher data transfer rate.
2.1.12 TDMA, FDMA AND SCDMA
Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA)
and Synchronous Code Division Multiple Access (SCDMA) are channel access
methods that allow multiple users to share the same frequency channel.

TDMA allows multiple users to share the same frequency channel by splitting
transmissions by time. Each user is allocated a number of time slots, and
transmits during those time slots.

FDMA allows multiple users to share the same frequency channel by assigning a
frequency band within the existing channel to each user.

SCDMA allows multiple users to share the same frequency channel by assigning
a unique orthogonal code to each user.
2.2 THE SYSTEM INFO SCREEN
Use this screen to see general information about your CGNV2’s hardware, its
software, and its connection to the Internet.
NOTE: Most of the information that displays in this screen is for troubleshooting
purposes only. However, you may need to use the MAC Address information
when setting up your network.
Click Cable > System Info . The following screen displays.