SYSTEM DESCRIPTION
3-2
PROMATRIX System User Handbook 1.1
3.2
Audio Routing
The DPM 4000 employs a digital audio matrix providing 4 inputs and 4 outputs. Additional matrix junctions for the
integrated gong and alarm signal generators, the vocal recording/playback unit, and the lock-on of the pilot tone
and its evaluation are incorporated. All input signals and internally generated signals can be freely mixed inside
the matrix and outputted through the 4 amplifier channels. Routing speaker lines to these amplifier channels is
achieved via the relay-matrix, which offers up to four separate audio buses simultaneously, while the DPM 4000
takes over the management of all these signals according to their priority.
Next to connecting paging stations, the audio inputs also serve for the connection of other audio sound sources,
like microphones, mixers, CD-players, cassette decks and DAT-recorders, tuners, etc. Several different input
modules are available to optimally adjust and match signal levels and connections.
3.3
Volume And Tone Controls / Delays
The PROMATRIX system provides individual volume controls for each input, output, and paging station. Even the
internal audio sources, like gong/alarm tone generators, voice message playback, and pilot tone generator
employ individual level controls, each. Additionally, it is possible to set an attenuation that unanimously affects the
inputs. This value determines the degree, by which the input signal is attenuated during the reproduction of
messages or other signals with a higher priority setting. This allows to smoothly fade-out and fade-in background
music during the transmission of important messages.
Besides, each of the four inputs embodies three fully parametric digital filters allowing for optimal tone control.
The filters provide different filter types like Hi-/Lo pass filters, shelving filters, and peak-dip-filters providing the
possibility for adjusting the sound within the entire audio transmission range. Factory-preset filter settings for the
DPC 4000 Series paging stations are already provided.
Setting volume levels and filter parameters is accomplished via PC during the configuration procedure. Further, it
is possible to alter any volume setting during the later operation of the system via special-function keys on the
paging stations or through external controls that are connected to analog or digital control inputs.
All four outputs employ digital delays allowing signal delays of up to 330 ms per channel. Natural delays, resulting
from loudspeaker positioning which causes time differences in the traveling of sonic events or environmental
circumstances related to architectural characteristics of the location, can be equalized without additional effort.
3.4
Signal Generators / Voice Message Memory
The DPM 4000 provides a variety of tone generators for the generation of gong, alarm, and text signals. Signal
generation is realized through DSP-algorithms, which are extremely flexible in use, so that they can be adjusted
to match nearly any possible application. Factory presets include 6 different gong signals, 18 different alarm
signals, plus sine cycle at any frequency. Other than in comparable equipment, the PROMATRIX signal
generating DSP-algorithms do not take up any extra storage of the voice message memory.
In addition, a voice message recording/playback module providing CD-quality sound is optionally available. With a
total recording time of approximately 6 minutes, 25 different messages are being managed. The DPM 4000
provides the possibility to install up to four optional FLASH-memory modules, depending on individual desires or
requirements.
Summary of Contents for PROMATRIX System
Page 1: ...Reference Manual...
