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KRAMER: SIMPLE CREATIVE TECHNOLOGY
Kramer VP-727A Protocol (Ver. 3.21)
26
INSTRUCTION
1
st
Byte
2
nd
Byte
3
rd
Byte
4
th
Byte
COMMENT
T-BAR POSITION
23
80
80+Value
81
Value 0~112
See NOTE 1
HEADPHONE SOURCE
PREVIEW
24
80
80
81
HEADPHONE SOURCE
PROGRAM
24
80
81
81
See NOTE 1
READ HEADPHONE SOURCE 25
80
80
81
See NOTE 3
SEND CHANGED AUDIO
PARAMETER INSTRUCTION
3F
80
81
81
See NOTE 7
NOTES on the above table:
NOTE 1:
The reply to these instructions is:
- 1st byte: 0x40 + 1st byte sent
- 2nd byte: Same as 2nd byte sent
- 3
rd
byte: Same as 3
rd
byte sent
- 4
th
byte: Same as 4th byte sent
Example:
1st byte 2nd byte 3rd byte 4th byte
Send
0x02
0x81
0x81
0x81
Reply
0x42
0x81
0x81
0x81
NOTE 2:
In the case of an error, the reply code will be:
- 1
st
byte: 0x50
- 2
nd
, 3
rd
and 4
th
byte – don’t care
NOTE 3:
The reply to these READ commands is:
- 1
st
byte: 0x40 + 1
st
byte sent
- 2
nd
byte: Same as the data that was sent
- 3
rd
byte: Requested data (as defined by the command which sets this parameter)
- 4
th
byte: 0x81
Example:
Read Preview Input 3 Level. The reply in this case tells us that the level is 0x17
1st byte 2nd byte 3rd byte 4th byte
Send
0x19
0x93
0x80
0x81
Reply
0x59
0x93
0x97
0x81
Example:
Read Program Input #. The reply in this case tells us that the Input 4 is connected to the Program output
1st byte 2nd byte 3rd byte 4th byte
Send
0x06
0x81
0x80
0x81
Reply
0x46
0x81
0x84
0x81
NOTE 4:
In the case where the VP-727A is in “ FADE” mode (ie, not “ CUT” mode), it will send this command via RS-232 after it has
completed the transition.