NEO-M8P - Hardware Integration Manual
UBX-15028081 - R05
Early Production Information
Hardware description
Page 9 of 27
On the other hand, noise generated at the I/O pins will emit from unshielded I/O lines. Receiver performance can
be degraded when this noise is coupled into the GNSS antenna (see Figure 14).
To avoid interference through improperly shielded lines, it is recommended to use series resistors (e.g. R>20
Ω
),
ferrite beads (e.g. BLM15HD102SN1) or inductors (e.g. LQG15HS47NJ02) in the I/O lines. These components will
affect the signal rise times and hence should be chosen with some care.
Figure 3 shows an example of EMI protection measures on the RX/TX line using a ferrite bead. More information
is given in section 3.3.
Figure 3: EMI Precautions
