User's Manual
13
txFilter
I
nput PCM
13-tap filter
parameters, 7
values
0…65535
---
MATLAB
calculate
AT+CTXFTR
rxGain
D
igital gain
of output
signal after
summation
of sidetone
0,
1…65535
Mute,
-84…+12dB
20 * log
(rxGain/16384)
AT+CRXGAIN
rxVol
D
igital
Volume of
output signal
after speech
decoder,
before
summation
of sidetone
and DAC
-
300…300
dbm -300…300dbm
AT+CLVL
AT+CVLVL
AT+CRXVOL
stGain
D
igital
attenuation
of sidetone
0,
1…65535
Mute,
-96…0dB
20 * log
(stGain/16384)-
12
AT+SIDET
rxFilter
O
utput PCM
13-tap filter
parameters, 7
values
0…65535
---
MATLAB
calculate
AT+CRXFTR
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”.