Presets; Other Ef2241 Features - Polycom Vortex EF2241 Reference Manual

4. Configure Your
Echo Canceller
Reference
P
RESETS
O EF2241 F
THER
© Polycom, Inc.
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 devices may use the EF bus reference as the reference for their echo cancel-
lers, 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.
The W, X, Y, and Z busses on the EF Bus contain NOM information.
See "NOM Active" on page 31 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
device. Connecting EF B
O to EF B
UT
on page 51 for pinout of Cat 5 cable.
Review what inputs need to be included in your echo canceller reference — See
"Build Your Echo Canceller Reference" on page 17. Remember that each micro-
phone needs to have an echo canceller reference. If all microphones are in the same
room and use the same reference, configure the echo canceller reference on one Vor-
tex device and assign it to the EF Bus as the EF Bus Reference. Only one Vortex
device out of multiple units linked together can put an echo canceller reference on the
EF Bus. For each additional unit, assign the echo canceller reference to use the EF
Bus Reference.
For systems with more than one room, you will need to use the W, X, Y, or Z sub-
busses to share the echo canceller reference in your additional rooms if the EF Bus
Reference has already been assigned to the EF Bus.
After configuring your Vortex device, save your settings to a User Preset (P
16-47). Also, set the P
P O P determines how the unit is configured upon power up.
OWER N RESET
If you have multiple Vortex devices in your system, save to a User Preset on each unit
and set the P O
OWER N
EATURES
For information on Macros, Logic Inputs, Logic Outputs, Input Filters and Output
Filters, please refer to the Conference Composer User Guide.
In a system with multiple devices, if all devices need the
I to another EF B
US N
O ) will not work. See"Connector Pinouts"
US UT
O P to the User Preset you have saved to. The
OWER N RESET
P accordingly.
RESET
25 V
T
HE
O of one
US UT
I of another Vortex
US N
I (or EF B
US N
RESETS
EF2241 Reference Manual
ORTEX
EF B
US
US