DPA-240A
DPA-240A:是一个2进4出的音箱处理器.两个输入电平由6个电平灯+1个削顶灯排列组成.4个输出灯是由5个
电平灯+1个削顶灯+1个限幅灯排列组成.该机器有2个模拟输入,1个立声体数字输入和4个模拟输出.每个输入
有5段参数滤波器,每个输出有7段参数滤波器.输入和输出滤波器都可以选择为贝塞尔或雪夫滤波器.在输出上
高通和低通滤波器达到24dB/Oct.输出限幅是RMS压限.限幅的THR范围高达-30dBu.22Us的步进,每个输入
和输出通道有高达850ms的延时.在输入之间和输出之间上都有连动功能.当这个机器作为安装机器时,参数改
变时该功能可以让ramps关闭输出电平.当需要现场演示和需要参数微小的改变,可以取消这个功能来设置运行.
给遥控控制的PC软件允许同时连接32台机器 .
DPA-240A: it is a 2 input x 4 output Speaker Processor. The activity of the 2 inputs is displayed by
rows of 6 level leds + 1 clip led, the activity of the 4 outputs is displayed by rows of 5 level leds + 1
clip led + 1 Limiter led. The unit has 2 analog inputs, a stereo digital input, and 4 analog outputs.
Each input has 5 parametric filters and each output has 7 parametric filters. All the input and output
filters can be selected to be Bell or Shelving filters. On the outputs a Hp and a Lp filters up to 24dB/Oct.
On Outputs, is available a Limiter working on the RMS value of the limiter's input. The Limiter's THR can
range up to -30dBu. Each input and output channels have delays up to 850ms, with steps of 22usec.
Linking functions between inputs and linking functions between outputs are available. A function is
allowing to have ramps closing the output level on parameter changes, when the unit is used installation
time; this function can be excluded when the unit is used live and it is necessary to perform small
changes to the set parameter...on the fly. The Pc SW for the remote control is allowing to connect in net
up to 32 units.
DPA-240A 技术参数
DPA-240A 2x4 声音处理系统，基于强大的DSP运算平台，具有以下的
规格参数：
输入: XLR平衡式,
输出: XLR平衡式,
最小负载: 150ohm
用户记忆: 24
调用记忆: 24
电平显示: 输入7灯显示[-20dBu到+15dBu;削波]
输出7灯显示[-15dBu到+15dBu;削波;限制]
THD+N: 0.001%在1kHz 0dBu
S/N: >110dB
频响: 20Hz–20kHz;-0.5dBu
Spdif输入增益(数字): 输入灵敏度0dBu,采用 RCA 连接器
处理: Dream SAM3716 DSP, 24x32位滤波处
理，96位精度中间数据运算结果
A/D D/A转换: 1xAK5392,24 比特 A/D; 2xAK4396, 24比特 D/A
显示: 2ⅹ20 字符LCD显示器
尺寸: 19"x(1U)
DPA-240A Technical Specifications
Inputs: XLR balanced
Outputs: XLR balanced, TCPIP
Minimum Load: 150ohm
User memories: 24
Recall memories: 24
VU metering: 7 led for Inputs [-20dBu up to +15dBu; Clip]
7 led for Outputs [-20dBu up to +15dBu; Clip; Limit]
Output Leds can be used for displaying the Output
level OR the Limiter activity
THD+N: 0.001% at 1kHz 0dBu
S/N: >110dB
Frequency Response: 20Hz – 20kHz ; -0.5dBu at 20Hz and 20kHz
Spdif input gain(Digital): 0dBu on RCA connector
Process Resolution: Dream SAM3716 DSP,24x32 bit for filtering process;
96 bits resolution on intermediate computation results
Display: Graphic 2x20 characters
Size: 19"X(1U
DPA-240A特点
处理模块： 输入/输出都带有延时，贝塞尔和雪弗滤波器， 输出带有延时，高/低通滤
波器和RMS限幅器
参数均衡器： 每个输入通道都有5个滤波器可设定为贝塞尔或雪弗滤波器
每个输出通道都有7个滤波器可设定为贝塞尔或雪弗滤波器
滤波器的类型： 对称的贝塞尔或高/低雪弗滤波器, 可延续到二阶
滤波器增益： 贝塞尔和雪弗的增益调节范围为：-15dBu ~+15dBu，步进精度为：0.5dBu
中心频率： 在20Hz~20kHz频带范围内以1/24倍频程的步进精度可供调节
滤波器 Q值/带宽： 范围为：0.05~3，步进精度为：0.05 (dB/oct)
高通滤波器 频率： 20Hz~20kHz 斜率：-6dB/Oct到-24dB/Oct可选
(类型：巴特沃斯，林奎茨-瑞利，贝塞尔，可选)
低通滤波器: 频率： 20Hz~20kHz 斜率：-6dB/Oct到-24dB/Oct可选
(类型：巴特沃斯，林奎茨-瑞利，贝塞尔，可选)
分辨率为： 1/24 倍频程
限幅器： RMS限幅器
启控阈值： 范围：20dBu~-10dBu
启控时间 范围： 5毫秒~200毫秒，在5毫秒~20毫秒区间，步进精度为：1毫秒在20毫秒~100
毫秒区间，步进精度为：10毫秒，在100毫秒~200毫秒区间，步进精度为：
20毫秒
释放时间范围： 0.1秒~3秒，步进精度为：0.1秒
最大延时： 848.998ms，步进精度为：21us
DPA-240A Features
Processes: Delay Bell and Shelving filters on Inputs/Outputs,Delay,
HP/LP and RMS Limiter on Outputs
Parametric Equalization: 5 filters on each input assignable as Bell or Shelving
7 filters on each output assignable as Bell or Shelving
Filter type: symmetrical Bell or High/Low Shelving up to second ordr
Filter gain: Bell and Shelving's gain is ranging from -15dBu up to
+15dBu by 0.5dBu resolution steps
Centre frequency: selectable with a 1/24th of octave resolution steps from
20Hz up to 20kHz
Filter Q/BW: Q from 0.05 up to 3 by 0.05 resolution steps
X-Over HPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order
(Butterworth, Linkwitz or Bessel -24dB/Oct)
X-Over LPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order
(Butterworth, Linkwitz or Bessel -24dB/Oct)
Filter's Freq.resolution: 1/24th of octave
Limiter: RMS Limiter
Threshold: from 20dBu up to -10dBu
Attack time: Attack time from 5ms up to 200ms (1ms resolution up to
20ms, then 10ms resolution up to 100ms and 20ms resolution
up to 200ms)
Release time: Release time from 0.1 sec up to 3 sec (0.1sestepscresolution)
Maximum Delay: 848.998ms by 21us increment/decrement
