User's Manual
GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 65 / 95
3.14. Multi-tone AIC
MC20 module has a function called multi-tone AIC (Active Interference Cancellation) to decease
harmonic of RF noise from Wi-Fi, GSM, 3G and 4G.
Up to 12 multi-tone AIC embedded in the module can provide effective narrow-band interference and
jamming elimination. The GNSS signal could be demodulated from the jammed signal, which can ensure
better navigation quality. AIC function is enabled by default. Enabling AIC function will increase current
consumption by about 1mA @VCC=3.3V. The following commands can be used to set AIC function.
Enable AIC function: $PMTK 286,1*23
Disable AIC function: $PMTK 286,0*22
In all-in-one solution, make sure the GNSS part is powered on before sending these PMTK commands.
NOTE