Antenna Connections - Campbell CELL200 Series Product Manual

PPPClose "deep
CR1000, CR800 series, and CR3000 CRBasic programs require before the
sleep" PPPOpen "wakeup"
command and before the command.
The USB port provides power for module configuration, but is not sufficient for normal operation.

8.3.3 Antenna connections

Use of a diversity antenna can improve system performance. It is required in 4G networks, but
not 2G or 3G.
Figure 8-4. Antenna connections
1. Connect the cellular antenna to the Primary Antenna connector. Mount the cellular
antenna so there is at least 20 cm between the antenna and the user or any bystander.
2. Connect a second antenna, if used, to the Diversity Antenna connector.
Antenna diversity, also called space diversity, is a scheme that uses two or more antennas to
improve the quality and reliability of a wireless link. Often, especially in urban and indoor
environments, there is no clear line of sight between transmitter and receiver. Instead, the signal
is reflected along multiple paths before finally being received. Each bounce can introduce phase
shifts, time delays, attenuations, and distortions that can destructively interfere with one another
at the aperture of the receiving antenna. Diversity-antenna-capable devices support multiple
antennas (usually two) in order to combat this phenomenon and minimize its effects.
CELL200-Series 4G LTE Cellular Module 33