Polycom Vortex EF2280 User Manual

Although this command is a channel integer command, the increment and decrement operators (> and <) are
not supported for this particular command.
This command is a channel integer command. See
Section 6.3 and Section 6.2 for more information on this type
of command. The minimum and maximum values for this command are 1 and 3, respectively.
This command is saved to non-volatile memory only as part of a preset. The state of this command will be
restored after power-up only if a preset is saved and that preset is set to be the power-on preset.
Example Description Status Message
F01REFASGN31
Configure the AEC on input
channel 3 to use AEC
Reference 1 (R1).
F01REFASGN31
F01REFASGN2?
Query which AEC reference is
currently being used for the
AEC on input channel 2 .
F01REFASGN2x , where x is either 1, 2, or 3 depending on
which AEC reference is currently being used.
F01REFASGN*3
Configure the AEC on all input
channels (1-8) to use the EF
Bus reference.
F01REFASGN*çççççççç
F01REFASGN*?
Query which AEC reference is
currently being used for the
AEC on each of the input
channels.
F01REFASGN*abcdefgh, where a-h are each either à, å, or
ccedil; depending on which AEC reference is currently
being used on each of the input channels.
8.126. REFGAIN -- Set Reference Output Gain
This command sets the effective output gain of the corresponding AEC reference. When doing volume control of
room speakers, it is a good idea to adjust this reference gain along with the speaker output gain so that the AEC
is aware of any volume changes. This will help prevent short echoes when volume changes are made.
There are two AEC references on the EF2280, EF2241, and EF2241, so there are two separate commands,
REFGAINR1 and REFGAINR2, for controlling the effective output gain of R1 and R2, respectively.
There is only one AEC reference on the EF2211 and EF2210, so there is only one command, REFGAINR1 for
controlling the effective output gain of R1.
This command was introduced in firmware version 2.5.0.
This command is an integer command. See
Section 6.2 for more information on this type of command. The
minimum and maximum values for this command are -100 and 20, respectively.
This command is saved to non-volatile memory only as part of a preset. The state of this command will be
restored after power-up only if a preset is saved and that preset is set to be the power-on preset.
Example Description Status Message
F01REFGAINR16
Set effective output gain of AEC
reference 1 (R1) to 6 dB.
F01REFGAINR16
Increase phone output gain by 3 dB.
, where x is the new value of the phone output gain.
If this command was issued after the example
above, then the status message would be .

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