ARIB 8494B, Руководство пользователя, Страница: 9 / 39

ARIB STD-T91
-3-
Chapter 2 Standard System
2.1 System Overview
UWB Radio System is a radio system that spreads electric power over a very wide bandwidth.
On the other hand, the standard does not specify a protocol layer.
2.2 System Configurations
In the radio equipment of the radio station of a UWB Radio System, a radio equipment not
connected to the AC mains power supply shall be permitted to emit radio waves only after it
receives a signal from another radio equipment connected to the AC mains power supply. (ORE,
Article 49.27)
Examples of a compliant system configuration are shown in Figure 2-1, 2-2 and 2-3.
(1) The case of radio equipment connected to the AC mains power supply which transmits
signals to another radio equipment:
If a radio equipment is connected to the AC mains power supply, it can start
transmission at any time.
Figure 2-1 Example of standard system configuration (1)
A1 A2
B
s
s
Notes:A1, A2: Radio equipment connected to the AC mains power supply.
B : Radio equipment not using AC mains power supply
s : Signal transmitted by A1.