User manual POLYCOM VORTEX EF2280

[. . . ] Vortex EF2280 Reference Manual VORTEX EF2280 REFERENCE MANUAL Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pre-Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 EF2280 Front and Rear Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Mounting the EF2280 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Connecting the EF2280 to Other Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Higher numbers result in darker characters on the display, lower numbers result in lighter characters. Meter. Selects which signal is displayed on the front panel LED meter. When the non-volatile memory is locked, you can query the settings but will get an error if you try to change them. Non-Volatile Memory Password. This feature sets or queries the non-volaORY tile lock password. This password is used in conjunction with NON-VOLATILE MEMLOCK. The default password is aspi (case is important). Screen Saver. Enables or disables the screen saver on the LCD panel. You can also set the idle time. Figure 19. EF2280 System submenu Software Version. Cycles power on the EF2280. © Polycom, Inc. 29 VORTEX EF2280 Reference Manual LCD MENU STRUCTURE INPUTS The input menu allows the user to adjust functions related to the input signals to the EF2280. This menu contains ACOUSTIC ECHO CANCELLATION, AUTOMATIC GAIN CONTROL, AGC MAXIMUM, AGC MINIMUM, GAIN ADJUST, LEVEL MIC/LINE, MUTE, NOISE CANCELLATION, NOISE CANCELLATION LEVEL, PHANTOM POWER, REFERENCE 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 AD. Inputs 1-8, A-D Acoustic Echo Cancellation (In 1-8) Automatic Gain Control (AGC), In 1-8 AGC Maximum (In 1-8) AGC Minimum (In 1-8) Gain Level Min/Line (In 1-8) Mute Noise Cancellation (In 1-8) Noise Cancellation Level (In 1-8) Phantom Power (In 1-8) Reference Assign (In 1-8) AEC Suppression (In 1-8) 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. This enables automatic gain control (AGC) on Inputs 1-8. Sets the maximum gain value that the AGC can apply. Sets the minimum gain value that the AGC can apply. This parameter adjusts the gain level of the 12 inputs. This is normally configured during the calibration process. The default setting is 15 dB for microphone signals and 0 dBu for line level signals. See "Level" above for setting mic/line level for Inputs 1-8. [. . . ] This transmitted signal is a delayed version of the original, which causes the echo. Acoustic Gain Acoustic gain is a term used in conjunction with sound reinforcement. It refers to how much louder the audio is with sound reinforcement compared to without sound reinforcement. Ambient Level The ambient level, also referred to as noise floor, is the background noise heard in a room when no one on the near or remote end is talking. The ASPI Bus The ASPI bus is used to link EF devices for RS-232 control using a single controller, such as a touch panel or PC. Automatic Gain Control (AGC) Automatic Microphone Mixer Convergence Rate Automatic gain control increases or decreases the gain on an audio signal to an acceptable value. A microphone mixer that turns microphone channels on and off based on the signal level going into the microphone. Convergence rate refers to the amount of echo a line or acoustic echo canceller can cancel per unit time, typically expressed in dB/sec. Better echo cancellers have a higher (faster) convergence rate. This term is typically used to quantify the time it takes to completely remove the echo from a conferencing system. [. . . ]