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XLR mic/line inputs, eight GPI control inputs, two XLR outputs capable of either independent or
stereo operation, and two VCA level inputs. In addition, two of the XLR mic/line inputs can be
configured for paging with adjustable ducking. The DRM 4000 can be programmed to change its
configuration through presets assigned to the GPI inputs, PC control (RS-232), or DPM 4000
control (RS-485). A good example of using the DRM 4000 stand-alone is in a typical
restaurant/bar application. There may be multiple sources such as TV, tuner, CD player, music
server, etc… and you may want a different source in the bar area such as the TV for the big
game, while in the restaurant you might want some jazz playing in the background. In addition,
you may want the hostess to be able to selectively page in the bar area for customers that are
waiting for tables in the restaurant.
Volume And Tone Controls / Delays
The ProAnnounce 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 arrival of
sounds or environmental circumstances related to architectural characteristics of the location, can
be equalized without additional effort.
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 ProAnnounce 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.
Control Inputs And Outputs
By using the control inputs, it is possible to link the ProAnnounce system to fire alert systems,
burglary alert systems, or to a central operating desk. It is also possible to connect external
switches, breakers, rotary controls or rotary encoders, respectively to query control outputs of
external units (power supplies, power amplifiers).
ElectroVoice/Dynacord BGM Guide Page 24