LightSpeed Technologies CAT 860 - Manual (Page 33)

64 65
1. Overview
2. Setup & Use
3. Optional Accessories
4. T
roubleshooting
5. W
arranty
, Safety
& Specifications
1. Overview
2. Setup & Use
3. Optional Accessories
4. T
roubleshooting
5. W
arranty
, Safety
& Specifications
<CMD>
Symbol
Hex
Value
<Param> Value Definition
IIAV? 0xB5 Command Packet:
The controller sends no
<Param> character in the
command packet.
Response Packet:
The CAT 860 sends two
<Param> characters in
the response packet. The
possible values are shown
below:
<Param> #1:
0x80 = IR Channel A
0x81 = IR Channel B
<Param> #2:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
14. RS-232 SERIAL INTERFACE
COMMAND DEFINITION
CONT’D
Definition: This command causes the CAT 860 to return a query response packet
where the first of two <Param> characters contains the selection status set by
IICH (<0xB0>) and the second contains the value stored in the volume-level
EEPROM variable selected by the IICH (<0xB0>) command.
If the command is not received properly, the CAT 860 responds by sending a
<NACK> character.
ADVANCED COMMAND SET FOR AUDIO MIXER OPERATIONS CONT’D
Audio Input Functions for the Infrared Source Group Cont’d
5. QUERY ABSOLUTE VOLUME FOR SELECTED INFRARED INPUT
COMMAND
<CMD>
Symbol
Hex
Value
<Param> Value Definition
IIAV p 0xB4 Command Packet:
The controller sends only
one <Param> character in
the command packet. The
possible values are shown
below:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB**
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
** Power up default
Response Packet:
The CAT 860 sends two
<Param> characters in
the response packet. The
possible values are shown
below:
<Param> #1:
0x80 = IR Channel A
0x81 = IR Channel B
<Param> #2:
0xCF = 0 dB
0xCE = -1dB
0xCD = -2dB
0xCC = -3dB
0xA7 = -40dB
0x83 = -76dB
0x82 = -77dB
0x81 = -78B
0x80 = -79dB
14. RS-232 SERIAL INTERFACE
COMMAND DEFINITION
CONT’D
Definition: This command modifies the volume-level EEPROM variable which
was selected by the IICH (<0xB0>) command. The EEPROM variable is set the
value indicated in the <param> character.
Afterwards, the value in the EEPROM variable is unconditionally loaded into the
corresponding volume control hardware register. This overrides any prior mute
operation.
If the command is properly received, the CAT 860 responds by repeating back
the command packet where the first of two replacement <Param> characters
contains the selection status set by IICH (<0xB0>) and the second contains the
resultant value stored in the volume-level EEPROM variable which was modified
by this command. If the command is not received properly, the CAT 860
responds by sending a <NACK> character.
For the audio inputs, the power up default values for all six input volume-level
EEPROM variables is set for -40dB.
ADVANCED COMMAND SET FOR AUDIO MIXER OPERATIONS CONT’D
Audio Input Functions for the Infrared Source Group Cont’d
4. SET ABSOLUTE VOLUME FOR SELECTED INFRARED INPUT COMMAND