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Operating Manual - VCM-88, VCM-88E, RD-8, RW-8 Level Controllers
8. Input and Output Configuration Options:
8.1 Single Connector Insert
To use a mixing console's single jack insert capa-
bilities with the VCM-88, an internal jumper must be se-
lected to properly configure the input and output connec-
O
tions. The jumper must be placed in the "1" position (see
drawing at top of page) for single jack in/out operation.
With the jumper set to "1", the input is on the tip and the
output is on the ring of the In jack. The Out jack is not
used. This convention is compatible with most mixing con-
soles equipped with single TRS insert jacks, but check your
mixer specifications before assuming this to be true.
Fig 8.1
On the VCM-88E, the single connector insert ca-
pability can be selected by placing jumpers in both the "1"
position and the "P" position. The (+) input pin becomes
the input connection and the (-) input pin becomes the out-
put connection. The out jack is not used.
8.2 Single Channel Pass-Through
When Using Master Output for personal monitor
mixing or other application, it is possible to pass a channel's
input directly to it's output jack, eliminating the need for
extra "Y" cables when daisy-chaining several VCM-88(E)
units together. Place the internal jumper in the "T" posi-
tion to select individual channel pass-through. The VCA
circuit's output signal is still summed to the Master Out-
put, but is removed from the channel output jack.
8.3 Input/Output Matrixing
Input Matrixing means that an input can be inter-
nally routed to one or more additional channel inputs, par-
ticularly useful in distributed zone applications. Each of
the matrixed VCA channels share a common input signal
but retain their distinct level controls via the RD-8, RW-8,
or other hardware or software controllers.
There are two steps required for input/output
matrixing. First, the internal jumper must be set to the "P"
position (see fig. 8.1) for each channel being patched into.
The actual input or output channel used to connect to the
input source remains in either the "2" position if separate
input and output jacks are used, or the "1" position if using
single jack TRS insertion.
The second step is to insert 22 gauge solid insu-
lated "bell wire" from the input or output Patch holes of
the source channel to the Patch socket of the channel being
patched into. Strip 1/4" of insulation from each end after
cutting to the appropriate length, and firmly press the bare
wire end straight into either side of the Patch hole, avoid-
ing any kinks along the strip length. Daisy chain the Patch
holes, one into the next, until all shared input requirements
are met. Those channels which have received the internal
patch input should all be set to the "P" position, and the
input jack on each of those channels cannot be used, since
each patched channel's input is derived internally.
9
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