Polycom Vortex EF2280 Applications

BUILDING YOUR SYSTEM WITH MULTIPLE VOR-
© Polycom, Inc. 3 Vortex
®
Applications and Presets Guide
B
UILDING
Y
OUR
S
YSTEM WITH
M
ULTIPLE
V
ORTEXES
®
The following is a checklist for building a system with multiple Vortexes:
1. Assign Inputs.
2. Assign Outputs.
3. Configure submatrix (the EF Bus).
4. Configure your echo canceller reference.
1. A
SSIGN
I
NPUTS
Assign each audio source to an input. Remember to include the conferencing equip-
ment such as the EF200 Phone Add or a video codec and any program audio.
2. A
SSIGN
O
UTPUTS
Try to assign as many outputs as you can to each Vortex to make a simpler submatrix.
Remember that Outputs 1-8 can also be used as outputs of the matrix. The bussing
can get very complicated very quickly if you choose to spread your outputs over sev-
eral units.
3. C
ONFIGURE THE SUBMATRIX
To link multiple Vortex devices together, use the submatrix on the EF Bus.
The EF Bus
The EF Bus is a high speed, low delay digital bus that includes the W, X, Y, and Z
audio busses as well as the echo canceller reference and remote control information
(for other Vortexes) and can link up to 8 Vortex devices. All busses include NOM
information and can be used for sharing microphone inputs, or for sharing mono or
stereo program information.
Crosspoint Mix Minus Bus.
Each Vortex device in the system can create four
output mixes (W, X, Y, and Z) and place them on the bus. Each device also can create
three input mixes each from the W, X, Y, and Z busses of the other devices (for a total
of 12 mixes). The mixes can have crosspoint gains on the signals from the other
devices. See Figure 1 below. All 12 mixes become inputs to the main matrix and can

Polycom Vortex EF2280 Specifications

General

Rack capacity	1U
Frequency range	20 - 20000 Hz
Cancellation span	270 ms
Echo cancellation	65 dB
Phantom power	48 V
Nominal input level	0 dB
Output gain	-100 - 20 dB
Output impedance	33 Ω
Maximum output amplitude	23 dB
RS-232 ports	1
Audio connections	2 x 3.5mm
Parallel ports quantity	2
Input voltage	110 - 240 V
Output current	20 mA
Output voltage	5 V
Input frequency	47/63 Hz
Power consumption (typical)	30 W
Operating temperature (T-T)	0 - 40 °C

Weight and Dimensions

Weight	1800 g
Dimensions (WxDxH)	483 x 244 x 45 mm