Sonodyne AM21P - Manual (Page 14)

Command: Channel Output Level (PLVL)
This command is used to get/set the level of an amplifier output channel.
%PLVL:xyy<CR>
Where x is output channel to select (between 1 and 4).
For volume parameters, the yy section of the command can range between 0x00 (muted) and 0xE1
(225 = +12dB of gain). This allows half dB steps, where 1 = -100dB, C9 (201) = 0dB and E1 (225)
= 12dB.
e.g. %PLVL:1C9<CR> sets the level of amplifier channel 1 to unity.
e.g. %PLVL:2BD<CR> sets the level of amplifier channel 2 to -6dB.
When the value has been changed (from either GUI or external comms), or the current value has
been requested, the amplifier will send:
%PLVL=xyy<CR> where x and yy are as per above.
To request the current value of an output level, use:
%PLVL:x??<CR>
Command: Channel Output Mute (PMUT)
This command is used to get/set the mute state of an amplifier output channel.
%PMUT:xyy<CR>
Where x is output channel to select (between 1 and 4).
For mute parameters, the yy section of the command can range between 00 (mute off) and 01
(mute on).
e.g. %PMUT:100<CR> sets the mute state of output channel 1 to unmuted.
e.g. %PMUT:201<CR> sets the mute state of output channel 2 to muted.
When the value has been changed (from either GUI or external comms), or the current value has
been requested, the amplifier will send:
%PMUT=xyy<CR> where x and yy are as per above.
To request the current value of the output mute state, use:
%PMUT:x??<CR>
PAGE 14 AMD SERIES INSTALLATION AND OPERATION MANUAL
THIRD PARTY CONTROL PROTOCOL