SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26
System description
Page 75 of 217
Function configurable via specific AT commands (see the
u-blox AT Commands Manual
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Signal routing: +USPM command
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Analog amplification, digital amplification: +USGC, +CLVL, +CRSL, +CMUT command
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Digital filtering: +UUBF, +UDBF commands
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Hands-free algorithms (echo cancellation, Noise suppression, Automatic Gain control) +UHFP command
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Sidetone generation (feedback of uplink speech signal to downlink path): +USTN command
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Playing/mixing of alert tones:
Service tones: Tone generator with 3 sinus tones +UPAR command
User generated tones: Tone generator with a single sinus tone +UTGN command
PCM audio files (for prompting): The storage format of PCM audio files is 8 kHz sample rate, signed
16 bits, little-endian, mono.
