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Input PCM
13-tap filter
txFilter
parameters, 7
values
Digital gain
of output
rxGain
signal after
summation
of sidetone
Digital
Volume of
output signal
after speech
rxVol
decoder,
before
summation
of sidetone
and DAC
Digital
stGain
attenuation
of sidetone
Output PCM
13-tap filter
rxFilter
parameters, 7
values
Note: If users require better experience on audio, users should modify these
parameters according to their own electronic and mechanical design.
C. USB Interface:
RC3000A-E module contains an USB interface. This interface is compliant with the
USB2.0 specification. The USB2.0 specification requires hosts such as the computer
to support all three USB speeds, namely low-speed (1.5Mbps), full-speed (12Mbps)
and high-speed (480Mbps). USB charging and USB-OTG is not supported.
Currently RC3000A supports the USB suspend and resume mechanism which can
help to save power. If not transaction is on USB bus, RC3000A will enter suspend
mode. When some events such as voice call or receiving SMS happen, RC3000A
will resume normal mode automatically.
Note: The RC3000A has two kinds of interface (UART and USB) to connect to host
CPU. USB interface is mapped to five virtual ports: "SIMTECH USB Modem",
"SIMTECH NMEA Device", "SIMTECH ATCOM Device", "SIMTECH Diagnostics
interface" and "SIMTECH Wireless Ethernet Adapter".
0...65535 ---
0,
Mute,
1...65535
-84...+12dB
-
dbm
300...300
0,
Mute,
1...65535
-96...0dB
0...65535 ---
MATLAB
AT+CTXFTR
calculate
20 * log
AT+CRXGAIN
(rxGain/16384)
AT+CLVL
-300...300dbm
AT+CVLVL
AT+CRXVOL
20 * log
(stGain/16384)-
AT+SIDET
12
MATLAB
AT+CRXFTR
calculate
13
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