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Matrix Crosspoint Commands
Get Crosspoint Gain - Gets the gain associated with a particular matrix crosspoint.
Host sends command - 81 (51 hex)
Host sends 2 bytes:
Byte 1:Input associated with the desired crosspoint. 0 - 10 (0-0A hex), where 0 - 9 corresponds to inputs 1
- 10, and 10 (0A hex) corresponds to the Expansion In.
Byte 2: Output associated with the desired crosspoint. 0 – 3, corresponds to outputs 1 - 4.
Host receives 1 byte: Crosspoint gain. 0 - 3, where 0 is off, 1 is -6dB, 2 is 0dB, and 3 is +3dB.
Set Crosspoint Gain - Sets the gain associated with a particular matrix crosspoint.
Host sends command - 80 (50 hex)
Host sends 3 bytes:
Byte 1:Input associated with the desired crosspoint. 0 - 10 (0-0A hex), where 0 - 9 corresponds to inputs 1
- 10, and 10 (0A hex) corresponds to the Expansion In.
Byte 2: Output associated with the desired crosspoint. 0 – 3, corresponds to outputs 1 - 4.
Byte 3: Crosspoint gain. 0 - 3, where 0 is off, 1 is -6dB, 2 is 0dB, and 3 is +3dB.
Set Multiple Input Crosspoint Gains to One Output - Sets the crosspoint gain from any combination of the 10
inputs to any one output to a specified gain.
Host sends command - 88 (58 hex)
Host sends 6 bytes:
Bytes 1-4: A 10 bit mask, where each bit position represents one of the 10 inputs. For example, the lowest
bit of the mask represents input 1, the next lowest bit input 2, and so on. The 10 bit mask is broken
into 4 bytes as follows:
Byte 1: Bits 0 - 6 of the mask (in the low 7 bits of the byte)
Byte 2: Bit 7 of the mask (positioned in the LSB of the byte)
Byte 3: Bits 8 - 9 of the mask (in the low 2 bits of the byte)
Byte 4: 0
A "1" in a bit position will apply the gain in byte 6 to the input/output crosspoint, while a "0" in a bit position
will not change the crosspoint gain.
Byte 5: Output associated with the desired crosspoint(s). 0 – 3, corresponds to outputs 1 - 4.
Byte 6: Crosspoint gain. 0 - 3, where 0 is off, 1 is -6dB, 2 is 0dB, and 3 is +3dB.
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