Allen&Heath DR66 USER GUIDE - Manual (Page 41)

DR66 & DR128 Installer User Guide 41
Appendix D : DR128 Architects Specification
The unit shall be a digital mix processor with 12 analogue inputs and 8
analogue outputs. The unit shall have a full crosspoint matrix, comprising 96
points, allowing any input, or combination of inputs, to be routed to any output
or combination of outputs. All crosspoints shall have a variable level. The 8
mic/line inputs and 8 line level outputs shall be on balanced XLRs with level
trims. The 4 stereo line inputs shall sum to mono and be on RCA phono
connectors with level trims. Comprehensive ducking and automatic mic
mixing capability shall be provided.
The mic/line inputs shall have internal jumpers for pad and phantom power
selection. The mic/line gain range shall be 18dB to 60dB with input
impedance of 2k
Ω (no pad) or 10kΩ (pad). The phono input gain sensitivity
shall be internally adjustable from -10dBv to +4dBu with an impedance of
10k
Ω. The inputs shall be converted using a 24 bit analogue-to-digital
converter.
The XLR outputs shall have a variable sensitivity from -10dBV to +4dBu with
an output impedance of 50
Ω. The conversion shall be by a 20 bit digital-to-
analogue converter.
The unit shall be configured over a standard RS232 port using a proprietary
32-bit Windows™ based software application with a Graphical User Interface.
Configurations shall be editable both on and off-line. The configuration shall
determine the allocation of internal signal processing resources to input and
output channels, as well as routing, levels, mutes, polarity reverse and
channel names. After configuration, the unit shall be capable of running
standalone without an external computer. Signal processing resources
available shall include compressors, gates, limiters, graphic equalisers,
parametric equalisers and crossovers. Optional expander cards shall provide
the facility for additional signal processing resources and/or supplementary
delay resources. The unit shall use Flash memory to permit firmware
upgrades via the RS232 port. An internal real-time clock shall allow
scheduling of timed events.
The RS232 port shall allow communication with industry standard remote
controllers to provide remote control of its levels, mutes and patch recall
using the Allen & Heath SysNet message protocol.
The unit shall be compatible with BS5839 installation requirements, be EMC
and CE compliant. The hybrid switched/linear power supply shall allow
emergency operation with a single 24V external battery and the unit shall
interface with alarm systems. The total power consumption shall be no more
than 70VA and the permissible incoming mains voltage range shall be
configurable to 100, 120, 220 or 230 VAC.
The front panel shall feature 12 installer-definable function keys for user
control of volume levels, mutes and patches, and also 12 installer-definable
function LEDs for 3-colour signal metering, mute and status indication. There
shall also be a backlit LCD for indication of setup menus, patch status and
channel levels.
Facilities for 8 programmable remote switches to control the unit parameters
shall be provided.
The unit shall weigh no more than 9kg in a 2U rack-mount chassis. The
chassis shall be constructed from zintec steel, be fully earth bonded and
feature a removable top for configuration of internal jumpers and presets.
The unit shall be the Allen & Heath DR128 digital audio mix processor.