Polycom Vortex EF2280 Reference Manual

LCD MENU STRUCTURE
VORTEX EF2280 Reference Manual 22 Technical Support: 800.765.9266
I NPUTS
The input menu allows the user to adjust functions related to the input signals
to the EF2280. This menu contains A
COUSTIC ECHO CANCELLATION, AUTOMATIC
G
AIN CONTROL, AGC MAXIMUM, AGC MINIMUM, GAIN ADJUST, LEVEL MIC/LINE,
M
UTE, NOISE CANCELLATION, NOISE CANCELLATION LEVEL, PHANTOM POWER, REFER-
ENCE ASSIGN, and AEC SUPPRESSION. The menu is organized around the Inputs
(1-8) and (A-D), so that you first select an input and then select settings for
that input. You can also choose to apply the settings to all Inputs, Inputs 1-8,
or Inputs A-D.
Acoustic Echo Cancellation. This allows you to enable or disable the
acoustic echo canceller on a particular channel. The default is On.
Automatic Gain Control (Inputs 1-8, T). This enables automatic
gain control (AGC) on Inputs 1-8 and T. The default is On.
AGC Max (Inputs 1-8, T). Sets the maximum gain value that the AGC
can apply for Inputs 1-8 and T.
AGC Min (Inputs 1-8, T). Sets the minimum gain value that the AGC
can apply for Inputs 1-8and T.
Gain. This parameter adjusts the gain level of the 12 inputs. This is nor-
mally configured during the calibration process. The default setting is 15
dB for microphone signals and 0 dB for line level signals. See “Level”
above for setting mic/line level for Inputs 1-8. The L
EVEL INDICATOR on the
front panel automatically reflects the level of the channel whose gain is being
adjusted.
Figure 21 below shows the gain adjust on Inputs 1-8 and A-D and the matrix
crosspoints.
Figure 12. Gain adjust and matrix crosspoints of Inputs 1-8 and A-D.
Figure 11. EF2280
Inputs submenu
Inputs 1-8, A-D
Mute
Acoustic Echo
Cancellation (In 1-8)
Gain
AGC Maximum
(In 1-8)
Level Min/Line
(In 1-8)
Automatic Gain Control
(AGC), In 1-8
Noise Cancellation Level
(In 1-8)
Phantom Power
(In 1-8)
Noise Cancellation
(In 1-8)
AEC Suppression
(In 1-8)
Reference Assign
(In 1-8)
AGC Minimum
(In 1-8)
Mic Preamp
Adjustable 33 to 63 dB
Output
Matrixer
Matrix Cross Point
Adjustable 20 to -100dB
Input Channel (1 of 8) Matrix Cross point Output Channel (1 of 12)
Input Level
Adjustable 0 to 20dB
Output
Matrixer
Matrix Cross Point
Adjustable +20 to -100dB
Input Channel (A, B, C, or D) Matrix Cross point Output Channel (1 of 12)
Gain Adjust
+20 to -100dB
Gain Adjust
+20 to -100

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