Mar 2017
Page 24
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.
the DAFR may retain more than the mandated recording
duration.
Data Error Rate
The bit error rate caused by corruption between input and
replay does not exceed one bit in 10
5
. The memory is
organised in such a way that the failure of a single memory
device does not lead to the loss of more than 16 seconds of
contiguous data in any period of 256 seconds.
Data Retention
Following the removal of power from the DAFR the recorded
information is retained for at least two years for the stipulated
operational and storage environment. Except for the
overwriting of the oldest data by new information, no means
for the erasure of the record is provided.
Audio Characteristics
Audio Inputs
Four independent, balanced inputs are provided.
Audio Storage Delay
The delay between the availability of audio information at the
input and the storing of it in the crash survivable memory does
not exceed 50 milliseconds.
Audio Duration - Minimum
(i)
Audio Channel 1 -
120 minutes
(ii) Audio Channel 2 -
120 minutes
(iii) Audio Channel 3 -
120 minutes
(iv) Audio Channel 4 -
120 minutes
Input Level
Minimum signal level:
78 µV
RMS
differential
Maximum signal level:
2.45 V
RMS
differential
Common mode:
±100mVDC maximum
Source impedance:
100
Ω
to 600
Ω
Input Reference Level
All audio channels:
2.00 V
RMS
(8.239dBu).
