Grass Valley Performer SD - Manual (Page 160)

3-42
Section 3 — Operation & Service
Response Message
The Response message is sent from Serial Interface to computer.
Tally Hdr < (3CH) byte 0
Destination tens byte 1
Destination ones byte 2
Source Level 1 tens byte 3
Source Level 1 ones byte 4
Protect Level 1 byte 5
Source Level 2 tens byte 6
Source Level 2 ones byte 7
Protect Level 2 byte 8
Source Level 3 tens byte 9
Source Level 3 ones byte 10
Protect Level 3 byte 11
Source Level 4 tens byte 12
Source Level 4 ones byte 13
Protect Level 4 byte 14
Checksum high nibble byte 15
Checksum lo nibble byte 16
Line Feed 0AH byte 17
Protect status is reported as a P if protected and as a period (.) if
not. Disabled levels are returned as 3 spaces (20H). Enabled levels
not responding are returned as 3 periods, 2EH.