MAX-8 / MAX-M8 - Hardware Integration Manual
UBX-15030059 - R05 Product handling Page 27 of 31
Production Information
Out-band interference
Out-band interference is caused by signal frequencies that are different from the GNSS carrier (see
Figure 20). The main sources are wireless communication systems such as GSM, CDMA, WCDMA,
Wi-Fi, BT, etc.
Figure 20: Out-band interference signals
Measures against out-band interference include maintaining a good grounding concept in the design
and adding a SAW or band pass ceramic filter (as recommend in
Section 4) into the antenna input line
to the GNSS receiver (see
Figure 21).
Figure 21: Measures against out-band interference
☞ For design-in recommendations in combination to Cellular operation see Appendix
☞ See the
GPS Implementation and Aiding Features in u-blox wireless modules
[7].
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