Professional Digital Audio Conference System Matrix DPA880AMT

Professional Digital Audio Conference System Matrix DPA880AMT Description

The DPA880AMT is a 8 input x 8 output Matrix for Conference Systems, fully remotely controlled via USB connection (Pc Sw remote control) or RS485 (Pc Sw remote control for net configuration, or TCP/IP or Wall Panel remote control), 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 DPA880AMT 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, and 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 DPA880AMT network of up to 32 units, all controlled by the Ps Sw remote control.

The DPA880AMT is a powerful Matrix, allowing selecting 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.

Particularly, when more microphone inputs are selected, the DPA880AM can provide powerful Auto mixer Functions .quickly and dramatically adjusting the microphones' input signal levels automatically. They lower the hiss, reverberation and other extraneous noise that occur when several microphones operate simultaneously. The DPA880AM is allowing to select for the Auto mixer functions between the NOM (Number of Open Microphones) and Gain Sharing algorithm.

The Auto mixers should only be used for installations with multiple microphones, and they offer the following benefits:

l Improved Signal to Noise Ratio (SNR) by limiting the Number of Open Microphones (NOM)

l Improved gain before feedback by providing gain attenuation with respect to the NOM (i.e. NOM attenuation)

l Reduced microphone comb filtering by limiting voice pickup to a single microphone (Gain Sharing)

Professional Digital Audio Conference System Matrix DPA880AMT 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

Professional Digital Audio Conference System Matrix DPA880AMT 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, TCP/IP
Size: 19” (1xRU)

Professional Digital Audio Conference System Matrix DPA880AMT Features

1. Maximum Delay: 380.998ms by 21us increment/decrement step, on each Output
2. Parametric Equalization: 5 filters on each input assignable as Bell or Shelving
3. Filters: Symmetrical Bell or High/Low Shelving up to second order
4. Filter gain: for Bell and Shelving the gain is ranging from -15dBu up to +15dBu by 0.5dBu resolution steps
5. Center frequency: selectable with a 1/24th of octave resolution steps from20Hz up to 20kHz
6. 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.
7. HPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order (Butterworth, Linkwitz or Bessel -24dB/Oct)
8. LPF: from 1st order (Butterworth -6dB/Oct) up to 4th Order (Butterworth, Linkwitz or Bessel -24dB/Oct)
9. Filter's Cutting Frequency steps: 1/24th of octave

Professional Digital Audio Conference System Matrix DPA880AMT RMS Compressor
1. Threshold: from 18dBu up to -12dBu
2. Attack time: Attack time from 5ms up to 200ms (1msresolution up to 20ms, then 10ms resolution up to 100ms and 20ms res. up to 200ms)
3. Release time: Release time from 0.1 sec up to 3 sec (0.1sec resolution)
4. Ratio: 1:1 (Bypass) up to 32:1 (Limiting), with Ratio Slope computed on
Log Table with 0.1dB steps precision
5. Knee: Soft/Hard

Professional Conference System Matrix DPA880AMT Peak Limiter
1. Threshold: from 18dBu up to -12dBu
2. 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)
3. Release time: Release time from 0.1 sec up to 3 sec (0.1sec resolution)
4. VU metering: 1 led for Microphone Phantom Power Supply Active5 led for
5. 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

Professional Digital Audio Conference System Matrix DPA880AMT Remote Control(fig1)

Professional Digital Audio Conference System Matrix DPA880AMT Remote Control(fig2)

Professional Digital Audio Conference System Matrix DPA880AMT Back Panel

Professional Digital Audio Conference System Matrix DPA880AMT Block scheme

Digital Audio Conference System Remote Controller