Rev.
6
Oct.18
Proprietary and Confidential - Contents subject to change
247
!AVTXVOL
Query/set audio profile’s Tx volume gain
Set the Tx volume gain for a specific audio profile. The value entered is mapped to a gain
range of -78 dB to +18 dB.
Gain is applied to PCM voice packets before they are fed into the vocoder, which encodes the
PCM packets for more efficient over the air transmission.
Supporting devices:
Audio-capable WPx5xx/WP76xx devices
Password required:
Yes (see
for details)
Reset required to apply changes:
No
Persistent across power cycles:
Yes
Usage:
•
Execution:
AT!AVTXVOL=<profile>,<gain>
Response:
OK
Purpose:
Set the Tx volume gain for the specified profile.
•
Query:
AT!AVTXVOL?<profile>
Response:
!AVTXVOL: <gain>
Purpose:
Show the Tx volume gain for the specified profile.
•
Query List:
AT!AVTXVOL=?
Purpose:
Display valid execution format and parameter values.
Parameters:
<profile> (Audio profile)
•
(WP75xx/WP8548)
0–5=Audio profile number (6 profiles are supported)
•
(WP76xx)
0–9=Audio profile number (10 profiles are supported)
<gain> (Encoder gain value)
•
Format: Hexadecimal
•
Valid <gain> values: 0–FFFF
•
Execution example:
Hexadecimal: AT!AVTXVOL=1,32A0
•
Query response example:
!AVTXVOL: 32A0
•
Volume gain is calculated using the following formula:
20 * LOG(<gain> / 0x2000)
•
Supported volume gain range: -78 dB to +18 dB
•
Recommended volume gain range: 0 dB to +18 dB
Table 12-2: Audio Command Details (Continued)
Command
Description
