Polycom Vortex EF2280 Reference Manual

LCD MENU STRUCTURE
VORTEX EF2280 Reference Manual 24 Technical Support: 800.765.9266
A UTOMIXER M ENU
These parameters configure how the Vortex device automatic microphone
mixer operates. Parameters include the following: D
ECAY TIME, HOLD TIME,
C
AMERA GATING THRESHOLD, BUS ID, CHAIRMAN MODE, CHAIRMAN MIC, LAST
M
IC ON MODE, LAST MIC NUMBER, LOCAL MAX NOM, GLOBAL MAX NOM, OFF
A
TTENUATION, AUTOMIXER, THRESHOLD TYPE, GATING MODE, ADAPTIVE THRESH-
OLD, MANUAL THRESHOLD, and GATE PRIORITY.
Global Settings.
Decay Time. Decay time is the amount of time the microphone audio
takes to ramp down to the Off Attenuation level after Hold Time. Decay
Time values range from 0 to 5000 msec. The default value is 1000 msec.
Hold Time. This is the amount of time the microphone stays On after the
energy in the channel drops below the gating threshold. The default value
is 500 msec. The range is 1 to 5000 msec. Microphone channels gating
On and Off too frequently during short pauses in speech might be the
result of setting the Hold Time too low while too many microphones gat-
ing on at the same time may be the result of Hold Time values that are
too high.
Camera Gating Threshold. Specifies the hold time for camera gating
information.
Figure 14. EF2280
Automixer submenu
Automixer
Mixer Settings
Global Settings
Channel Settings
Figure 15. Automixer parameters.
Ambient Level
ADAPTIVE THRESHOLD
Channel OFF
Channel ON
Channel turns on when
signal level is above
Adaptive Threshold
Microphone
Audio
Time
Signal Level
HOLD
T
IME
OFF ATTENUATION
DECAY
T
IME
Global Settings
Decay
Hold Time
Camera Gating
Threshold
Automixer

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