Polycom Vortex EF2280 Reference Manual

INTEGRATING THE EF2280 INTO YOUR SYSTEM
VORTEX EF2280 Reference Manual 30 Technical Support: 800.765.9266
the signal because it is too low. For example, if the meter is showing an aver-
age gain of -15 dB, you should increase your input gain by 15 dB. If the meter
shows an average gain of +10 dB, you should decrease your input gain by 10
dB.
Set Levels on Line
Input Channels
Set the line input channel gains (Channels A-D) to match the nominal level of
the incoming equipment. The line inputs have a maximum nominal level of 0
dBu. If your incoming line level inputs have a higher nominal level than 0 dBu
you will want to use an analog pad to remove the level.
Figure 20. AGC Meter on the Diagnostics page of the Conference Composer
software.
I
F THE AGC METER SHOWS... ADJUST THE INPUT GAIN IN THIS WAY.
positive gain Increase gain by the level shown in
the box.
negative gain Decrease gain by the level shown
in the box.
an average level of 0 dB You’ve set the Input Gain to a good
level!
Table 2: How to set the Input Gain using the AGC meter on the Conference
Composer Diagnostics page.
AGC Level Meter
Read AGC level
Adjust Input Gain here

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