Polycom Vortex EF2211 User Manual

S01FADERGIL>3
Increase fader gains on all line
inputs by 3 dB.
S01FADERIAa
S01FADERIBb
,
where a and b are the new values of the
fader gains for each of the line inputs. If this
command was issued after the example
above, then the status messages would be:
S01FADERIA10
S01FADERIB10
.
S01FADERGIL?
Query fader gains on all line inputs.
S01FADERIAa
S01FADERIBb
,
where a and b are the new values of the
fader gains for each of the line inputs. If this
command was issued after the example
above, then the status messages would be:
S01FADERIA10
S01FADERIB10
.
8.48. FADERI -- Set Input Gain Fader
The input channels of the Vortex pass through an analog gain stage before reaching the analog to
digital converter. The gain of this stage is adjustable via a the
GAINI command. Once in the digital
domain, there is an additional gain stage, referred to as a fader. The fader gain is adjustable by the
FADERI command. The
GAINI setting should be used for calilbration in order to maximize the
resolution and quality of the signal at the analog to digital converter. The FADERI command is
provided as a way to do volume control on the inputs without affecting the calibration.
This command also adjusts the fader gain of the input signal coming from the telephone interface.
This command was introduced in firmware version 2.5.0.
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 -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
S01FADERIA10
Set fader gain on input A to 10
dB.
S01FADERIA10

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