Polycom Vortex EF2280 Reference Manual

INTEGRATING THE EF2280 INTO YOUR SYSTEM
© Polycom, Inc. 35 VORTEX EF2280 Reference Manual
Last Mic Number. Sets the microphone number that will remain on
when “Last Mic On” mode is set to manual. Setting this value to 0 will
cause the automixer to leave the last open microphone on. The last
microphone number is specified for each automixer, but is only used in
manual “Last Mic On” mode.
Local Max NOM. Sets the maximum number of open microphones
(NOM) limit for the specified automixer. This NOM limit is a “local” limit,
meaning that this limit applies only to the specific Vortex device that it is
set on.
Global Max NOM. Sets the global maximum number of open micro-
phones (NOM) limit for each linked automixer. The maximum value for
this command is 64. This NOM limit is a “global” limit, meaning that this
limit applies to all linked automixers with the same Bus ID.
Off Attenuation. Sets the Off Attenuation (in dB) for the specified auto-
mixer. Setting this value to 18 would result in the microphone signals
being attenuated by 18 dB when gated off. This value is set indepen-
dently for each of the automixers.
Channel Settings.
Automixer (Inputs 1-8). This allows you to select which automatic
microphone mixer (1 or 2) a particular microphone channel is assigned to.
A microphone may only be assigned to automatic mixer 1, automatic
mixer 2, or neither (but not both).
Threshold Type. Sets adaptive or manual automatic gating thresholds
per input. The default is adaptive.
Gating Mode. Sets the automixer gating control mode for specified
input channel. The possible modes are Normal Gating, Microphone Forced
On, or Microphone Forced Off.
Adpative Threshold. This is also referred to as the Adaptive Threshold.
This allows you to determine when to gate a microphone on based on an
estimate of the background noise level. The default value is to gate a
channel on if it is more than 10 dB louder than the background noise
level. Values range from 0 to 100 dB. To set the gate ratio, scroll through
the gate ratio range and select the desired gate ratio by pressing E
NTER.
Manual Threshold. Sets the automixer gating threshold for the speci-
fied input channel. This value is only used if the input set to Manual Gat-
ing via the T
HRESHOLD TYPE option. The manual threshold value ranges
from 0 to 100 (shown in Conference Composer as 0 to -100) and repre-
sents the level in dB the audio must be above the current ambient back-
ground noise to gate on the microphone. A value close to 0 makes it easy
to gate on, a value close to 100 makes it very difficult to gate on
Microphone Priority. The priority of each microphone can be assigned
a value ranging from 1 to 4. Priority 1 microphones have priority over pri-
ority 4 microphones for gating. The default is to have all microphones set
to priority 1. If Chairman Mode is enabled, all microphones including ones
with priority of 1 will be gated off when the Chairman mic gates on.

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