Polycom Vortex EF2211 User Manual

8.12. AMAUTO -- Select Automatic or Manual Gating for
each Automixer Input
This command selects or queries the state of automatic or manual automixer gating thresholds for the
specified input channel. Automatic thresholds mean that the automixer adaptively determines the
gating thresholds based on current speech and noise levels using the gating ratio specified by the
AMGATER command. Manual thresholds mean that the automixer uses the absolute threshold set via
the
AMGATET command.
This command is a channel boolean command. See
Section 6.3 and Section 6.1 for more information
on this type of command.
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
S01AMAUTO11
Select automatic thresholds for
automixer gating on input channel 1.
S01AMAUTO11
S01AMAUTO10
Select manual thresholds for automixer
gating on input channel 1.
S01AMAUTO10
S01AMAUTO12
Toggle between automatic and manual
thresholds for automixer gating on
input channel 1.
S01AMAUTO1x , where x is 0 or 1
depending on whether input channel 1 is
currently set for manual or automatic
thresholds.
S01AMAUTO1?
Query AMAUTO state on input channel
1.
S01AMAUTO1x , where x is 0 or 1
depending on whether input channel 1 is
currently set for manual or automatic
thresholds.
8.13. AMBUSID -- Set Automixer Groupings for EF Bus
This command is used to assign the internal automixer to one of the EF Bus automixer groups. For
example, consider three EF2211's, each of which has its automixer enabled for its microphone input
(input 1). Now, if each of these EF2211's sets its automixer to have Bus ID 5, then the three
automixers (one from each EF2211) will work as a single automixer containing 3 (3 x 1) microphones.
Setting AMBUSID to 0 means that the specified automixer is not grouped on the bus. For compatibility
with EF2280 and EF2241 commands, the AMBUSID command requires you to specify the automixer
number with the command. On the EF2280 and EF2241, there are two internal automixers. However,
the EF2211 only has one internal automixer, so 1 is always specified.
The first argument in the AMBUSID command is the automixer number (always 1 for the EF2211) and
the second argument is the Bus ID (0 for none, or 1 through 8). Although this command is a channel
integer command, use of the wildcard character for the automixer number is not supported.

Polycom Vortex EF2211 Specifications

Power

input voltage	110-240 VAC
frequency	47-63 Hz
power consumption	25 W
phantom power	24 V

Connectors

RS-232	DB9F
EF Bus In/Out	RJ45
Telephone Line/Set	RJ11
Control/Status	DB25F
Audio	3.5mm quick connect terminal blocks

Audio Specifications

microphone input	-30 dBu to +0 dBu
line inputs	-20 dBu to +0 dBu
line outputs	-20 dBu to +0 dBu
loudspeaker output	10 W, 4-16 Ohms
input impedance	10 k Ohms
output impedance	50 Ohms
headroom	20 dB
signal to noise ratio	85 dB
frequency response	20 Hz - 22 kHz

Echo and Noise Cancellation

total cancellation	65 dB
convergence rate	40 dB/second
noise cancellation	0-15 dB
echo cancellation	40 dB, total >65 dB
convergence	30 dB/second
cancellation span	32 ms
acoustic echo cancellation span	270 ms

Operating Environment

operating temperature	0 °C - 40 °C
status outputs	5 V, 20 mA each

Weight and Dimensions

width	483 mm
length	244 mm
height	45 mm
weight	1.8 kg
shipping weight	2.5 kg