M
ATRIX
S
ETUP
T
AB
The Input/Output Matrix tab sets the
input to output assignments for the
AS16x12.
Input/Output Crosspoint -
Allows the
input/output crosspoint gain to be set.
Each of the 12 rows of 18 crosspoint
boxes represent input connections which
may be set from inputs to outputs 1-12.
To set a crosspoint gain, simply click on
the crosspoint box at
the intersection of the
d e s i red
input
and
d e s i red output. The
c rosspoint box will
turn yellow, and you’ll
see
the
following
selection box pop up:
At this point, the current crosspoint gain is highlighted in the selection box. Choose a new gain by clicking on the desired
crosspoint gain value. If you decide not to change the crosspoint gain, you may press the Esc key or click on the crosspoint
box again to close the selection box without changing the crosspoint gain. The first 16 crosspoint boxes in each output row
are for the AS16x12 inputs. Two other signals are available to be included in the output mixes: Exp In and Noise.
Exp In is the signal from the 8 pin mini-DIN LecNet Expansion In connector on the rear panel of the AS16x12. This signal
would be used if another LecNet device, like a TH3A Telephone Hybrid, were connected to the AS16x12 via the expansion
cable. In this case, the TH3A’s receive signal would be present at the Exp In connector. The crosspoint gains for Exp In to any
active outputs would be set to the desired gain so that the participants in the local room could hear the far-end part i c i p a n t .
Another application might be the addition of 8 more inputs using an AS8. In this case, the sum of all 8 AS8 channels would
appear at the Exp In connector. This signal could then be distributed as necessary to appropriate output mixes.
The AS16x12 includes an internal broadband noise generator which can be included into any of the output mixes. One
application for the noise generator is bench conferences in courtrooms. During a bench conference, noise is output over the
sound system in the jury box, the gallery, and any other place that shouldn’t hear the conversation at the bench.
Short Cuts:
A right mouse click on a crosspoint gain box will set the crosspoint gain to 0dB. A middle mouse click (for those
with a three button mouse) will set the crosspoint gain to “Off”.
Refresh Matrix (Ref) Button -
Updates the crosspoint matrix display to indicate the active AS16x12 setup. This is useful
when the room combining function is in use, or any other function which might change the matrix crosspoint setup.
Clear Matrix (Clr) Button -
Clears all matrix crosspoints to the “Off” state.
15
-15dB
-10dB
-5dB
-0dB
+3dB
+6dB
Off
