Manual

Distribution Amplifier (DA)—User Manual
60
D-2.2 ACK Type B
ACK Byte + LB + Index1 + Value1 + Index2 + Value2 +…..+ CRC Byte
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
AB
ACC 0 0 Device ID (0 – 31)
LB
Length for the total data bytes (Index + Value)
IB n
Index
VB n
Value
… …
CB
CRC
AB & CB: These are the same as the ACK Type A.
LB: LB value is equal to the total data bytes (Index + Value), not include the CRC byte.
The maximum LB value of the ACK Type B is twice the total number of output or
input.
IB: Often means that the input or output port number. (Port 1 = 1, Port 2 = 2… Port n = n)
VB: Response the status refers to the table.
Request Description Index Value
0x07 Request Video Output Channel
0x08 Request Audio Output Channel
Output Input
0x09 Request Video Input Plug Status
0x0A Request Audio Input Plug Status
Input
0x0B Request Video Output Plug Status
0x0C Request Audio Output Plug Status
Output
Enable
1: Plug
0: Unplug
0x11 Request Audio Output Mute Status 0: Unmute, 1: Mute
0x13 Request Audio Output Volume
0x15 Request Audio Output Bass
0x17 Request Audio Output Treble
0x19 Request Audio Output Subwoofer
Level Range
(0 – 100)
0x1D Request Audio Output Delay Low Delay1
0x1F Request Audio Output Delay High
Output
Delay2
0x21 Request Input EDID Type Input EDID Type
Please refer to “Table – Command Index List” and “Table – Command Value List”.