Polycom Vortex EF2280 Reference Manual

LCD MENU STRUCTURE
© Polycom, Inc. 23 VORTEX EF2280 Reference Manual
Level. Use this parameter to select mic or line level on Inputs 1-8.
Mute. This selects which input channel (1-8, A-D) or the W, X, Y, or Z input
is muted. The default is not muted.
Noise Cancellation (Inputs 1-8, T). This allows you to enable or
disable noise cancellation.
Noise Cancellation Level (Inputs 1-8, T). Selects the level of
noise cancellation. This ranges from 0 to 15 dB. The default is 10 dB.
Phantom Power. Use this parameter to turn phantom power On or Off
for inputs 1-8.
Echo Canceller Reference. This parameter decides which reference
is associated with which zone. Choose between R
EF1, REF2, or the external
bus reference.
AEC Suppression. Sets the amount of double talk suppression used in
the AEC. The values correspond to the following settings: 1 = No Suppres-
sion, 2 = Light Suppression, 3 = Heavy Suppression, 4 = Half-Duplex.
O UTPUTS
The OUTPUT menu contains GAIN, NOM ACTIVE, and MUTE. As with the INPUT
menus, this is done on a per channel basis.
Output Gain. Choose the gain applied to each output signal using this
parameter. The default setting is 0 dB. Though the EF2280 allows for pos-
itive output gain, you should always try to adjust input gains to a good level
so that the output gain is 0 dB. If you find that you need a positive output
gain from the EF2280, first check your input gain to make sure you are get-
ting a good level (around 0dB). Keep the output gain at around 0 dB. Then,
for the best gain structure, use your amplifier to raise the volume in your sys-
tem.
Mute Output. Use this to mute or unmute each Output.
NOM Active. This allows you to select whether the NOM attenuator is
active for a particular output channel (Outputs 1-8, A-D). The NOM attenuator
will attenuate the output signal by 10*log
10
(NOM) where NOM is the number
of open microphones in that particular output channel. NOM is calculated
based on the number of open microphones for each signal that is in the out-
put.
Output Delay Enable. This allows you to enable delay to each of the
outputs.
Output Delay. Sets the amount of delay on the output. The default value
is 0 ms. The range is 0 to 340.0 ms in 0.1 ms increments.
Figure 13. EF2280
Outputs submenu
Outputs
Mute Output
NOM Attenuation
On/Off
Output Gain
Delay Enable
Delay

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