Polycom Vortex EF2280 Applications page 6

Figure 1. W, X, Y, and Z submatrices.
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Vortex Applications and Presets Guide
be mixed with the other inputs to create Outputs 1-8, A-D, Ref 1, Ref 2, and W, X, Y,
and Z bus outputs.
Submatrix
Bus W
W 0 W 1 W 2 W
B B B
Bus X
X 0 X 1 X 2
B B B
Bus Y
Y 0 Y 1 Y 2
B B B
Bus Z
Z 0 Z 1 Z 2
B B B
EF Bus Reference.
same echo canceller reference, one device should be designated to put its echo cancel-
ler reference (either Ref 1 or Ref 2) on the EF bus to be used as the EF Bus Reference.
All other Vortexes may use the EF bus reference as the reference for their echo can-
cellers, or they can use their own internal references. The references may include a
mix of any input, with crosspoint gains, including W, X, Y, and Z busses.
NOM Bus.
All busses on the EF Bus contain NOM information. See "NOM
Active" on page 29 of the Vortex Reference Manual for more information on how
NOM attenuation is applied.
Note.
The EF Bus must be connected so that the EF B
Vortex device is connected to the EF B
Connecting EF B
EF B O
US
page 43 for pinout of Cat 5 cable.
E C
CHO ANCELLER
Review what inputs need to be included in your echo canceller reference — See
"Build Your Echo Canceller Reference (if not using Preset 0)" on page 13. of the Vor-
tex Reference Manual. Remember that each microphone needs an echo canceller ref-
erence. If all microphones are in the same room and use the same reference,
configure the echo canceller reference on one Vortex and assign it to the EF Bus as
the EF Bus Reference. Only one Vortex out of multiple units linked together can put
B Y S
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3 W 4 W 5 W 6 W
B B B B
X 3 X 4 X 5 X 6 X
B B B B
Y 3 Y 4 Y 5 Y 6 Y
B B B B
Z 3 Z 4 Z 5 Z 6 Z
B B B B
In a system with multiple devices, if all devices need the
I to another EF B
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) will not work. See"Connector Pinouts" on
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EFERENCE
4 Technical Support: (800) 932-2774
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YSTEM WITH ULTIPLE
7
B
7
B
7
B
7
B
O of one
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I of another Vortex.
US N
I (or EF B O
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to