GM862 Product Description
80272ST10019a Rev. 10 – 18/09/2008
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 21 of 60
2.15 Audio levels specifications
The audio path of the
Telit GM862 module
is organized into two main paths:
•
internal path (called also MT)
•
external path (called also HF)
These two paths are meant respectively for handset and headset/hands free use. The
Telit GM862
Family modules
has a built in echo canceller and a noise suppressor, tuned separately for the two audio
paths; for the internal path the echo canceller parameters are suited to cancel the echo generated by
a handset, while for the external audio path they are suited for a hands free use.
For more information on the audio refer to the Hardware User Guide.
2.16 ADC Converter
The on board ADCs are 11-bit converter. They are able to read a voltage level in the range of 0÷2
volts applied on the ADC pin input, and convert it into 11 bit word.
Min
Max
Units
Voltage range
0
2
Volt
AD conversion
11
11
bits
Resolution
1
1
mV
Sampling rate
1 (idle)
60 (on traffic)
secs
