Extron Electronics Matrix 200 - Manual (Page 109)

Extron • Matrix 200 • User’s Manual
Appendix B • Programming Guide
B-21
Configure Audio Inputs
Case 1 — SCMD = 85h, configure input section of plane #5 (standard audio board
address)
. Format: 54h, 85h, {(InLeftGain, InRightGain, InMisc, CR), ...}Cks1, Cks2, EOT
Where: InLeftGain, bits 6 - 0 are the seven most significant bits of the left
channel gain of the input circuit. (Range: 81h - FFh = -95dB to + 31dB)
InRightGain, bits 6 -0 are the seven most significant bits of the right
channel gain of the input circuit. (Range: 81h - FFh = -95dB to +31dB)
InMisc, are the miscellaneous bits associated with the input circuit:
bit 0 = lsb (the 8th) of the left input gain (if 1, add 0.5 dB to InLeftGain)
bit 1 = lsb (the 8th) of the left input gain (if 1, add 0.5 dB to InRightGain)
bit 2 = 1 for standard/consumer signal input level (-10 dBu)
= 0 for professional input level (+4 dBu)
bits 6-3 are reserved; must be zero
bit 7 = always “1” (this is a data byte)
Example: 54h, 85h, EAh, EAh, 83h, 0Dh, ...Cks1, Cks2, 04h
Set left & right input #1 for +10.5dB at professional input level. A string
follows for the remaining seven audio inputs.
Configure Audio Outputs
Case 2 — SCMD = 95h, configure output of plane #5 (standard audio board
address).
Format: 54h, 95h, {(OutLeftGain, OutRightGain, OutMisc, CR) ...}
Where: OutLeftGain, bits 6-0 are not used; must be 80h.
OutRightGain, bits 6-0 are not used; must be 80h.
OutMisc are the miscellaneous bits associated with the output circuit:
bit 0 = reserved; must be zero.
bit 1 = reserved; must be zero.
bit 2 = 1 for standard/consumer signal input level (-10 dBu)
= 0 for professional input level (+4 dBu)
bits 4-3 connect the left and right stereo channels as follows:
00b = Pass thru (left-to-left, right-to-right)
01b = left channel to both left & right outputs
10b = right channel input to both left & right outputs
11b = swap: left input to right output; right input to left output.
bits 6-5 are reserved; must be zero.
bit 7 = always “1” (this is a data byte)
Example: 54h, 95h, 80h, 80h, 9Ch, 0Dh, ... Cks1, Cks2, 04h
Set output #1 for consumer signal and swap left & right channels. A
data string must follow for each of the other seven outputs.
dB range:
hex
dB
FFh +31
FEh +30
etc.
E0h 0dB
DFh
-1
DEh -2
etc.
C1h -31
C0h -32
etc.
81h
-95
See conversion
table on page B-2.