Galaxy Audio DSPOT, User Manual

Page: 37 / 40

Input Gain and Output Volume Control:
UPDATE GAINS-PHASE: CMD=01H
A. The User has to send the following Command, including the value to be assigned to “Vol”, for
modifying the Input Gain (Chn = 0, 1) or the Output Volume (Chn = 2, 3, 4, 5).
Also the Output signal Phase can be modified:
TX:
XX = 0,..,31 (ID device)
Chn=0,...,5: Channel selected, 0, 1=In1, In2; 2,...,5=Out1,..,Out4; when Channel 0, 1 selected,
then Vol=Input
Gain, when Channel 2, 3, 4, 5 selected, then Vol= Output Vol.
Phs= Phase only if the Chn> 1; Value=0, 1 where 0=direct, 1=inverse (180')
Vol= Gains from 0 to 180 (-12dB/ +6dB step 0.1dB)
B. If the command has been properly executed and the Gain/Volume modified, then the
microcontroller will send back to the User (eg Crestron/AMX Remote Control..) the same frame
used by the command:
RX:
STX ID
_
M ID
_
N CMD D0 D1 D2 D3 D4 D5 D6 D7 ETX
F0H C1H XX
01H
Chn
00H 00H 00H 00H 00H
Phs Vol F7H
STX ID
_
M ID
_
N CMD D0 D1 D2 D3 D4 D5 D6 D7 ETX
F0H C1H XX
01H
Chn
00H 00H 00H 00H 00H
Phs Vol F7H
36