W Submatrix
● Inputs: WB0-WB7 (with one invalid)
● Outputs: WM0-WM2
X Submatrix
● Inputs: XB0-XB7 (with one invalid)
● Outputs: XM0-XM2
Y Submatrix
● Inputs: YB0-YB7 (with one invalid)
● Outputs: YM0-YM2
Z Submatrix
● Inputs: ZB0-ZB7 (with one invalid)
● Outputs: ZM0-ZM2
For the P signal, bus there is a 7 x 2 matrix that allows the user to define up to two mixes of the P signal
bus. The reason the matrix is 7 x 2 instead of 8 x 2 is that since we can transmit on the P bus, we do not
need to mix our own channels in this matrix. The inputs and outputs for the 7 x 2 P bus matrix are as
follows.
P Submatrix
● Inputs: PB0-PB7 (with one invalid)
● Outputs: PM0-PM1
The crosspoint gains on all outputs are user adjustable. The "M" in the output labels of the submatrices
indicates that the signals are being fed into the Main Matrix.
The main matrix consists of the following inputs: analog inputs 1-4 and A-D, the telephone input T, the
signal generator (SG), the outputs of the EF Bus submatrices PM0-PM1, WM0-WM2, XM0-XM2, YM0-YM2,
and ZM0-ZM2. This is a total of 24 inputs.
The main matrix consists of the following outputs: analog outputs 1-4 and A-D, the output to the telephone
interface T, the output to the power amplifier L, AEC reference signals R1 and R2, and the EF bus outputs P,
W, X, Y, and Z. This is a total of 17 outputs.
The matrix commands can adjust two types of parameters: integer and boolean. We will introduce the matrix
commands by using the MGAIN command as an example. This is an integer matrix command that is used to
set the gain (in dB) at any of the crosspoints in the main matrix or EF Bus submatrices.
Matrix commands are similar to channel commands except that instead of specifying a single channel, it is
necessary to specify a crosspoint (or range of crosspoints). In order to specify a single crosspoint, you use
the input and output labels discussed in this section. The first label always specifies the input to the matrix
and the second label always specifies the output of the matrix. For example, to set the gain of the crosspoint
(1, A) to -3 dB, you would send ' B04MGAIN1,A,-3 ' which sets the gain at the crosspoint to -3 dB. In this
case, a status message will be generated similar to ' B04MGAIN1,A,-3 '.
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