Mar 2017 Page 26
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.
Crosstalk - Audio to Audio
With the Reference Signal applied to one audio channel, the
recorded crosstalk on the other audio channels is at least 40dB
below the Reference Level.
Crosstalk - Data to Audio
With a valid data signal applied to the data recording channel
of the DAFR, the recorded crosstalk on any audio channel is at
least 40dB below the Reference Level.
Audio Channel Balance
With half of the Reference Signal applied to all audio channels,
the signals recovered differ by no more than 3dB.
Quality Index
The speech transmission index of the audio channels, when
assessed using the method described in EUROCAE ED112, Part
I annex D, is at least the values given below:
(i) Audio Channel 1: 0.75
(ii) Audio Channel 2: 0.75
(iii) Audio Channel 3: 0.75
(iv) Audio Channel 4: 0.85
Audio Output
Summed output of all audio channels. Nominal 10mW
(2.45V
RMS
) into 600 load.
Replay Audio Outputs
0.77V
RMS
(0dBu) 5dB at Input Reference Level (0dBu).
Audio Channel Synchronization
The relative time synchronization between audio channels is
better than 4.0 milliseconds.
Audio Timebase
The timebase of the recorded signals is reproducible with an
accuracy of better than 0.1%.
Voice Erase
Following the use of the provided voice erase facility, audio
information cannot be accessed by normal replay means.
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