Polycom Vortex EF2280 User Manual

generated. The PRESETQ command is provided so that a control system can execute a preset and not generated
heavy data traffic from the resulting status messages. Of course, this assumes that the control system is not
interested in any of the acknowledgements. The
PRESETX command can be used to execute the preset without
suppressing the status messages.
Example Description Status Message
F01PRESETQ18
Execute preset number 18 without generating any status messages.
F01PRESETQ18
8.123. PRESETW -- Save a Preset
This command writes the current settings of the device into the user preset with the specified number. Since the
factory presets (0 - 15) are read-only, an ERROR#071 will be generated if they are specified in the PRESETW
command.
Once a preset it saved, it can be recalled via the
PRESETX and PRESETQ commands. The preset can also be set
to be executed automatically at power-up via the
PRESETP command.
This command is saved to global non-volatile memory and is not part of a preset. Its value is saved each time it
is changed. It will retain its value after power-down. Since this command writes to non-volatile memory, there
will be a delay before an acknowledgment is returned.
Example Description Status Message
F01PRESETW18
Save the current device settings as preset 18.
F01PRESETW18
8.124. PRESETX -- Execute a Preset
This command executes the preset corresponding to the specified number, which must be between 0 and 47.
The preset must either be a pre-defined factory preset (0 - 15) or a user preset (16 - 47) that has been
previously defined via the
PRESETW command. If the specified preset is empty, then an error condition of
ERROR#070 will be returned. If one or more of the commands in the preset generated errors, then an error
condition of ERROR#072 will be returned.
When the PRESETX command executes, status messages for all of the commands in the preset will be generated
(unless
acknowledgement mode is turned off). The status messages can be suppressed by using the PRESETQ
command, which is exactly the same as the PRESETX command except that status messages are suppressed.
Example Description Status Message
F01PRESETX18
Execute preset number 18.
Status messages for all the commands in the preset will be
generated first, followed by the message: F01PRESETX18
8.125. REFASGN -- Assign AEC Reference to Input Channel
This command assigns an AEC reference signal (R1, R2, or EF Bus) to an input channel. Only inputs 1-8 have
echo cancellation, so the command is only valid for those channels. Assigning 1 to an input channel selects AEC
Reference 1 (R1). Assigning 2 to an input channel selects AEC Reference 2 (R2). Assigning 3 to an input channel
selects the EF Bus Reference. The EF Bus reference is an AEC reference that is placed on the EF Bus by one (and
only one) of the linked Vortexes. See the
BUSREF command for more information about the EF Bus reference.

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