Mar 2017 Page 93
DATA ACQUISITION FLIGHT RECORDER Type D51615-202-XXX or D51615-
202-XXX-090 with CCU Type D51616-XXXX and CAM Type D51623-XXXX
Installation and Operating Manual with Illustrated Parts
List
Commercial in Confidence
PIM434-I
© Penny & Giles Aerospace Ltd. No part of this work may be reproduced or distributed by any
means without prior permission in writing from the copyright owner.
1.3 SPECIFICATION
1.3.1 Functional Characteristics - Performance
Microphone (If fitted)
Frequency Response: 150Hz to 10kHz (10dB range) at
Sound Pressure Levels (SPL)
between 60dB to 94dB over 20 µPa.
Harmonic Distortion
(over 150Hz to 8kHz):
Less than 5% for SPL up to 90dB
over 20 µPa.
Harmonic Distortion (at
1kHz):
Less than 10% for SPL at 120dB
over 20 µPa.
Polar Response:
Ratio of front to 60 degrees
response less than 6dB range. Ratio
of front to rear response >10dB.
Microphone Preamplifier
Frequency Response: 150Hz to 10kHz (6dB range)
Continuous decrease in output level
outside this range.
Harmonic Distortion at
Maximum Gain (over
150Hz to 8kHz):
Less than 5% for input level
equivalent to SPL at 120dB over 20
µPa.
Signal to Noise: At least 48dB for maximum input
signal.
Output Level: Adjustable between 0.25V RMS (-
10dBm) and 1.4V RMS (+5dBm) for
input level equivalent to 120dB SPL
over 20 µPa. At input level
equivalent to 70dB SPL over 20 µPa
the output level is no more than
25dB below the output level stated
above.
1.3.2 Physical and Other Characteristics
The Penny & Giles Aerospace Ltd. Control Units are identified
by the convention shown in Figure 18:
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