1-2 Chapter 1
GSM Use Model
Cellular Communications—Overview
Cellular Communications—Overview
Figure 1-1 Cellular Site Components
Wireless Digital communications systems are made up of five parts: a
central phone switching system, a microwave or landline link, a base
transceiver station (BTS), an antenna and preamplifier system, and the
air interface with the mobile device shown in Figure 1-1. The ESA is
designed to verify the satisfactory operation of the base station system
which includes the microwave link, the base transceiver station, the
antenna and preamplifier system, and the air interface with the mobile
device. The measurements in this guide are divided into chapters
according to the subsystems that each tests.
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