Designed in Italy Assembled in China
Source and Gain:
The PDA500P is making available as Input source together
with the external analog signal, also an internal noise generator, providing to
the user the possibility to test the system using a White or Pink Noise
internally generated.
As said, checking the
Noise Generator
box within the SOURCE frame, a
White or Pink Noise can be generated by the Unit, which level can be set
from -40dBfs up to 0dBfs.
IMPORTANT NOTE: the White and Pink Noise Generators are not filtering the
generated noise, therefore, when using them, need to make sure that if not
set in the current presets any Hp Filter with higher frequency than 20Hz
and Higher slope than 12dB/Oct, so as no Low Pass filter on the High path is
set at 20kHz with a slope higher than 18dB/Oct, then for a proper
measurement NEED to set filters as follow:
HP @ 22.4Hz Butterworth with 12dB/Oct slope (-6dB Corner at 22.4Hz)
LP @ 20kHz Butterworth with 18dB/Oct slope (-12dB Corner at 22.4kHz)
The Noise Signal generator is ijecting the signal soon after the noise Gate
and BEFORE the Gain Control, which will be available for a further control of
the generated Noise leve
Gain:
with this control it is possible to set the Input Level from -12dB to
+12dB
Phase:
checking or left unchecked the box of the PHASE frame, it is possible
to set the Input Signal Polarity; the polarity can be “Normal” (box unchecked)
or “Inverted” (which means rotated of 180 Degrees, with the box checked).
DLF:
checking the DLF box, a Dynamic Loudness Filter ca be made active.
The Dynamic Loudness is intended to provide a Dynamic Adjustment of the
Low and High frequencies amount on the base of the Input Signal level.
This in order to, there where the system is used with a not specific music
program and there where there is the possibility to use the system for
background music application, with low input signal level, to get more
intelligibility and pleasure in the sound perception.
To know more about the technical characteristics of the DLF, please check
the “DFL Dynamic Loudness Filter Table” paragraph at the end of this
documents.
High Pass Filter
: from this frame it is possible to set the Output Channels
High Pass Filter (HPF).
“Frequency”: (Low Cut frequency) the selectable frequencies range is from
20Hz to 20kHz in steps of 1/24 of an Octave.
“Slope”: allows you to select the X-Over's High Pass Filter Shape and Order.
The available shapes and orders for the High Pass Filter are listed below:
–
No cut-off
(High Pass Filter Bypassed)
–
Buttw 6dB
(Butterworth Filter 6dB/Oct Slope)
–
Buttw 12dB
(Butterworth Filter 12dB/Oct Slope)
–
LRiley 12dB
(Linkwitz/Riley Filter 12dB/Oct Slope)
–
Bessel 12dB
(Bessel Filter 12dB/Oct Slope)
–
Buttw 18dB
(Butterworth Filter 18dB/Oct Slope)
–
Buttw 24dB
(Butterworth Filter 24dB/Oct Slope)
–
LRiley 24dB
(Linkwitz/Riley Filter 24dB/Oct Slope)
–
Bessel 24dB
(Bessel Filter 24dB/Oct Slope)
PDA500P User Manual
