9
Interfaces: Ensure that the signals and baud rate of the main equipment match
those of the UM4B0 module
Antenna interface: Make sure the antenna impedance matches, and the cable is
short without any kinks, try to avoid all acute angles
Try to avoid designing in any circuits underneath UM4B0
This module is a temperature sensitive device, so dramatic changes in
temperature will result in reduced performance. Keep it away as far as possible
from any high-power high-temperature air and heating devices
3.2
UM4B0 Reference Design
Figure 3-1 Minimum Reference Design
