DPA-880
DPA-880是一款8进8出的会议系统矩阵
有4种方式来实现远程控制和网络配置，
PC对单机：使用USB线连接到PC，通过PC软件来完全控制
PC对多机：通过RS485线连接到PC，通过PC软件来完全控制
通过TCP/IP功能连接到墙壁控制器,通过PC软件来完全控制
通过RS485线连接到墙壁控制器，由墙壁控制器来简单控制
PC软件可以完全控制机器所有功能，可以编辑和上传预设到机器。
8个通道，均可以接受线路输入或麦克风输入，通过8*8的矩阵分配到8个输出。
麦克风输入：
提供基于“移频”的啸叫反馈抑制算法对人声进行有效的处理，可选的48V幻象电源。
每个通道的DSP处理模块：
输入/输出增益调节
5段参数EQ，滤波器类型可选（Peak，Lo/Hi Shelving）， 增益+/-12dB可调
高低通滤波器，斜率可达-24dB/Oct, 滤波器类型可选（巴特沃斯，贝塞尔，林奎茨-瑞利）
RMS压缩器/PEAK限幅器,相位控制/混合控制,延迟器
DPA-880的前控制面板：
提供6个按钮来供用户选择相应的6个预设。
2*24 的字符LCD可以显示设备名字和当前预设的名字
8列LED分别显示对应通道的状态，线路输入/麦克风输入/反馈抑制/信号/削波/限幅器
DPA-880 后面板：
8通道的输入/输出平衡音频端口
有USB通信端口，RS485通信输入/输出端口和TCP/IP
有4个可编程开关，用来控制周边设备，可以接受0 到5V的输入/输出电平。
墙壁控制器：
提供4个按钮来调用相应的4个预设，提供音量+/-，调节主输出音量的大小。
在不使用墙壁控制器的情况下， 机器可以通过RS485通信端口与PC软件连接，最多可以
支持32台机器联网，机器的网络地址支持在线下载，PC软件可以完全控制在网的32台机器。
DPA-880 规格参数：
输入/输出平台
最大输入电平： LINE:+18 dBu
MIC:-11dBu
最大输出低电平: +18 dBu
DSP处理 Dream SAM3716, 24bit (data) x 96 bit
(coeff.),加强版精确度高软件
采样频率： 48kHz
转换器 4xAK5385B, 24 bit A/D;
1xAK4358, 24bit D/A
主要数据
信噪比： >104dB
失真度+噪声： 0.005%
频率响应（旁通）： 20Hz-20kHz (+- 1 dB)
输入通道： 8均衡
输出通道： 8均衡
显示： 图形显示，2x24字符
电源： 110-220v
远程控制： RS485，USB,TCP/IP
尺寸：
DPA-880 Description
The DPA-880 is a 8 input x 8 output Matrix for Conference Systems, fullyremotely controlled via
USB connection (Pc Sw remote control) or RS485(Pc Sw remote control for net configuration, or
Wall Panel remote control)or TCP/IP, allowing the complete routing of 8 line or microphone inputs
to 8 line outputs.For the microphone inputs, can be selected a Phantom power Supply.
The DPA-880 on the front panel offer the possibility to select up to 6 presets, edited and uploaded
on the unit through the Pc Sw, thanks to 6 push buttons.
The Name of the current preset is displayed on a wide 2x24charachters LCD and the main
activities of the unit's channels are shown by 8 rows of 5 leds: Line, Microphone, Feedback,
Signal/Clip, Limiter.
Anyone of the 6 available presets can even be recalled by a remote Wall Panel Control, allowing
also the control of the Master Output Volume.
The Wall Remote Control, acting through a RS485 connection, and the Remote PC control, via
USB, can operate simultaneously.
When not used for the Wall Panel Remote Control, the RS485 connection can be used for the
creation of a DPA-880 network of up to 32 units, all controlled by the Ps Sw remote control.
The DPA-880 is a powerful Matrix, allowing to select as input, for any of the 8 input independently,
a Line Level Input or a Microphone Input, where for the microphone input there is the possibility to
provide a 48V Phantom Power supply.
When selected a microphone Input, the unit provide the possibility to activate a Feedback
Eliminator based on a powerful “pitch shifting” algorithm, particularly effective for voice
applications. Each output has as first stage an 8x8 Matrix allowing the mix of the 8 inputs and
processing the final mix with a 5 bands Eq, with filters assignable as Peaker or Hi/Low Shelving,
able to range from -12dB up to +12dB gain; following the 5bands Eq, a Hp and a LP filters up to
24dB/Oct shape the output channel band's limits; a delay is also available for signal/speakers
alignments.
The Dynamic process of each output channel is left to a powerful RMS Compressor, with variable
Ratio and to a final Peak Limiter for the complete output peak control.
Master Input Gain and Master output Level controls are available for the simultaneous level control
of the all inputs and outputs; four Switches, Sw controlled, are available for the On/Off control of
remote devices.
DPA-880 Technical Specifications
Maximum Input Level: Line :+18 dBu
MIC:-11dBu
Maximum Output Level Low: +18 dBu
Digital Processing (DSP): Dream SAM3716, 24bit (data) x 96 bit
(coeff.),Sw Enhanced Precision
Sampling Frequency: 48kHz
Converters 4xAK5385B, 24 bit A/D; 1xAK4358, 24bit D/A
General Data
S/N: >104dB
THD+N: 0.005%
Frequency Response (Bypass): 20Hz-20kHz (+- 1 dB)
Input Channels: 8, balanced
Output Channels: 8, balanced
Display: Graphic, 2x24 characters
Power Supply: 110-220V
Remote Control: RS485, USB
Size: 19” (1xRU)
DPA-880 Speaker Management Remote Control
DPA-880 特征
最大延时： 每个输出通道以21us增加/降低步进达到延时380.998ms
参数均衡： 每个输入通道配置了3个贝利或雪弗滤波器
滤波器： 对称贝利或高/低通雪弗至第二阶命令
滤波器增益： 步进：0.5dBu分辨率，贝利或雪弗增益范围为：±15dBu。
中心频： 以1/24th倍频程分辨率步进为基准在±20Hz范围内选择。
滤波器Q/BW： Q/BW步进(Q)： 0.1分辨率
Q/BW范围：0.4/3.59~10/0.0312
一旦设置均衡滤波，每个均衡滤波器能被独立“旁通”。
高通滤波器： 从第一阶命令（巴特沃斯-6dB/Oct）到第四阶命令（巴特沃斯，
林奎特或贝塞尔-24dB/Oct)
低通滤波器： 从第一阶命令（巴特沃斯-6dB/Oct）到第四阶命令（巴特沃斯，
林奎特或贝塞尔-24dB/Oct)
滤波器的切频步进： 1/24th的倍频程
RMS压限器
阈值： 18dBu~-12dBu
检测时间： 范围：5ms~200ms（1ms分辨率~20ms；10ms分辨率~100ms；
20ms~200ms）
释放时间： 范围：0.1秒~3秒（0.1秒分辨率）
比例： 1：1（直通）至32：1（硬限幅）
拐点： 软/硬
峰值压限器
阈值： 18dBu~-12dBu
检测时间： 5ms~200ms（1ms分辨率~20ms，然后10ms分辨率至20ms
阻值，高达200ms）
释放时间： 0.1秒至3秒（0.1秒分辨率）
音量电平： 麦克风幻象电源的1个LED灯启动输出通道的5个LED灯
活动性： 线-线所选麦克风输入麦克风输入所选的反馈-反馈激活（只有选择
了麦克风输入才可以用）信号/削峰灯变为蓝色表明当前信号在输出
通道，当信号削波时，灯变位红色。指示RMS压限器或峰值压限器
的活动。
DPA-880 Features
Maximum Delay: 380.998ms by 21us increment/decrement step, on each
Output
Parametric Equalization: 3 filters on each input assignable as Bell or Shelving
Filters: Symmetrical Bell or High/Low Shelving up to second order
Filter gain: for Bell and Shelving the gain is ranging from -15dBu upto
+15dBu by 0.5dBu resolution steps
Center frequency: selectable with a 1/24th of octave resolution steps from20Hz
up to 20kHz
Filter Q/BW: Q/BW from 0.4/3.59 up to 10/0.0312 by 0.1 resolution steps (Q)
Each Filter of the Eq can be singularly “Bypassed” once set.
HPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order
(Butterworth, Linkwitz or Bessel -24dB/Oct)
LPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order
(Butterworth, Linkwitz or Bessel -24dB/Oct)
Filter's Cutting Frequency steps: 1/24th of octave
RMS Compressor
Threshold: from 18dBu up to -12dBu
Attack time: Attack time from 5ms up to 200ms (1ms resolution up to 20ms,
then 10ms resolution up to 100ms and 20ms res. up to 200ms)
Release time: Release time from 0.1 sec up to 3 sec (0.1sec resolution)
Ratio: 1:1 (Bypass) up to 32:1 (Limiting), with Ratio Slope computed on
Log Table with 0.1dB steps precision
Knee: Soft/Hard
Peak Limiter
Threshold: from 18dBu up to -12dBu
Attack time: Attack time from 5ms up to 200ms (1ms resolution up to 20ms,
then 10ms resolution up to 100ms and 20ms res. up to 200ms)
Release time: Release time from 0.1 sec up to 3 sec (0.1sec resolution)
VU metering: 1 led for Microphone Phantom Power Supply Active5 led for
Outputs Activities:Line - Line input Selected Mic - Microphone
input Selected Feedback - Feedback Active (available ONLY if
selected Mic Input) Sign/Clip -Turning on Blue when present
Signal on the channel and turning Red when the signal is clipping
Limit- Showing the RMS Compressor or the Peak Limiter activity
SOFTWARE iPad CONTROL INTERFACE
For the Wi-Fi/LAN DSP880 Remote Control
Home page of the control iPad APP:TCP/IP Network setting
Output Channel Configuration
Zoomed slider for levels fine adjustment
Zoomed view of the equalizers response setting
RMS Compressor
Peak Limiter
Input Channel Configuration
Input equalizer parameters setting
