Polycom Vortex EF2280 Applications

BUILDING YOUR SYSTEM WITH MULTIPLE VOR-
© Polycom, Inc. 5 Vortex
®
Applications and Presets Guide
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.
A
UTOMIXER
S
ETTINGS FOR
M
ULTIPLE
V
ORTEXES
When using more than one Vortex in your room system, you have several possibilities
for how you configure the automixer. Each Vortex can operate as one of the follow-
ing:
• One automixer, independent of other Vortexes linked to it
• Two automixers, independent of other Vortexes linked to it
• One large automixer, sharing automixer functions with other Vortexes linked to it
• Two large automixers, sharing automixer functions with other Vortexes linked to
it
Automixer and Bus
Mixer Settings
To operate the Vortex in any of the above possibilites, two global parameters need to
be changed: the A
UTOMIXER
and the B
US
M
IXER
(see Figure 2). The A
UTOMIXER
parameter chooses which automixer the input channel will be on (this is changed
either on the A
UTOMIXER
page in Conference Composer or on the M
ATRIX
M
IXER
page).
The B
US
M
IXER
parameter is used to assign one of the two internal automixers to one
of the eight EF Bus automixer groups. For example, consider three Vortexes each of
which has four microphones assigned to Automixer 1 and 4 microphones assigned to
Automixer 2. Now, if each of these Vortexes sets their Automixer 1 to have Bus
Mixer 5 (the Bus Mixer is also referred to as the Bus ID), then the three automixers
(one from each Vortex) will work as a single automixer containing 12 (3 x 4) micro-
phones. Setting B
US
M
IXER
to 0 means that the automixer is not grouped on the EF
Bus.
Operating as an
Independent
Automixer
To set the Vortex to operate as an independent automixer (or two independent mix-
ers), set the B
US
M
IXER
parameter to 0, or to a number that is different from any other
automixer group currently in use on the EF Bus.
Figure 2. Vortex Automixer Global Parameters in Conference Composer Software

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