Specifications
AirPrime UMTS / LTE MC/SL-Series Extended AT Command Reference
178 Proprietary and Confidential 2130616
!AVTXVOL
Supporting chipsets (voice-
enabled devices only):
• MDM8200A (min f/w rev:
T3_0_1_5)
Note: For MDM6200, MSM6290,
and QSC6270, see !AVTXVOL on
page 158.
Set Tx volume
Set the Tx volume gain for the specified audio profile. The Tx volume gain
determines the gain, from -84 dB to +12 dB, for the voice that is transmitted over the
air. This gain is applied to the PCM voice packets prior to feeding them into the
vocoder, which encodes the PCM packets into a more efficient format for over the air
transmission.
This setting is stored in non-volatile memory and persists across power cycles.
• The change takes effect when a phone call is made or received.
• The change takes effect immediately for the specified profile.
Usage:
• Execution: AT!AVTXVOL=<profile>, <value>
Response:
OK
Purpose: Set the Tx volume gain for the specified <profile>.
• Query: AT!AVTXVOL?<profile>
Response:
<value>
OK
Purpose: Display the Tx volume gain for the specified <profile>.
Parameters:
<profile> (Voice profiles)
• Valid range: 0–2 (See !AVSETDEV on page 173 for available profiles.)
<value> (Actual Rx volume in dB)
• The value is entered/returned in hexadecimal format.
• Valid range: 0x0000–0xFFFF
!AVUSEMCU
Supporting chipsets (voice-
enabled devices only):
• MDM8200A (min f/w rev:
T2.0.2.1)
Note: This command is not
password protected.
Select codec controller
Select the device that will control the codec—the modem or the MCU.
The change takes effect immediately. This setting is stored in non-volatile memory
and persists across power cycles.
Usage:
• Execution: AT!AVUSEMCU=<value>
Response:
OK
Purpose: Select the device that controls the codec.
• Query: AT!AVUSEMCU?
Response:
!AVUSEMCU: <value>
OK
Purpose: Identify the device that is controlling the codec.
• Query list: AT!AVUSEMCU=?
Purpose: Return the command format and supported <values>.
Parameters:
<value> (Codec controller)
• 0=Modem controls codec
• 1=MCU controls codec
Table 8-2: I2S audio command details (Continued)
Command Description