(3)
Not Applicable
**ON A/C 151-199, 201-210,
A. PRAM
(Ref. Fig. 003)
(1)
The messages and music are stored in the PRAM in form of compressed digital data. Three memory cards, each 40 megabyte capacity, are used to store the message and music data. One memory card is for the message data and two for the music data. You can change the Announcement (ANN) and Boarding Music (BGM), when you insert the flash memory card, with the new software, behind the access door at the front of the PRAM. The download of the new software starts automatically when the PRAM is energized. The LCD display at the front of the PRAM shows the active ANN and MUSIC channel.
(2)
The PRAM has the function to give an emergency announcement automatically in the event of rapid cabin decompression. A ground signal from a rapid cabin decompression sensor starts the emergency announcement.
(3)
The Pram has four channels for stored music data in analog audio mode. The PRAM uses these four channels as distributors for audio to the individual passenger thru the passenger entertainment system.
**ON A/C 001-049, 051-099, 101-105,
B. Defined System Characteristics
(1)
The frequency response, from 50 to 13000 Hz +/- 3 dB.
(2)
The signal-to-noise ratio, 45 dB minimum in reference to 0 dBm output level.
(3)
The harmonic distortion, 1.0 % maximum at 0.48 V output.
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Reproducer Figure 003
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(4)
The Wow of Flutter (WRMS), 0.1 % maximum.
(5)
The output level, announce 0.48 V + 3 dB, -0 dB into 600 Ohm balanced load. Boarding music 0.775 V +/- 3 dB into 600 Ohm balanced load.
(6)
The output level controls, (two screwdriver adjustable volume controls on the front panel of the main unit) for emergency and normal announcement control output level from -20 dB to + 6dB minimum.
(7)
The number of messages, a total of 256 in a C-60 type cassette which has a play time of 120 minutes.
(8)
The access time which is of 3 s maximum for access to announcement in the stand-by condition. A 1 s maximum for access to the emergency announcment through the rapid decompression switch. A 1 s maximum for access to SSSV programs.
(9)
The emergency announcement repeat which you can set for 1 to 8 times through an internal preset switch.
(10)
A power consumption of 30 W maximum with 115 V AC - 400 Hz.
(11)
An interface connector ARINC 600 size 1.
**ON A/C 106-149, 211-299, 301-399,
B. Defined System Characteristics
(1)
The frequency response, from 50 to 10,000 Hz +/- 3 dBm for boarding music outputand 50 to 4,000 Hz +/- 3 dBm for solid state announcement output.
(2)
The signal-to-noise ratio, 60 dBm minimum.
(3)
The harmonic distortion, less than 1 % maximum (1 kHz/0 dBm).
(4)
The wow and flutter, less than 0.15 % weighted (WRMS) per IEEE standard 193-1971.
(5)
The output level, announcement and boarding music 0 dBm (1mW into 600 Ohm load) per ARINC 539A, adjustable from 0 dBm to -21 dBm. Emergency announcement output level +6 dBm nominal.
(6)
The access time is less than 1 second for access to announcements and emergency announcement.
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(7) The power consumption of less than 75 W average with 115 V AC - 400 Hz.
(8) An interface connector ARINC 600 size 1. **ON A/C 151-158, 201-210,
B. Defined System Characteristics
(1)
The frequency range is from 50Hz to 6kHz for the announcement and 50Hz to 13,5kHz for the boarding music.
(2)
The signal-to-noise rate is more than 60 dB.
(3)
The harmonic distortion is less than 3.0 % for messages and less than 1.0% for music.
(4)
The output-levels are 0.775V/600Ohms.
(5)
The memory capacity is 40M Bytes for ANN and 80M Bytes for BGM.
(6)
The reproduction time is 2 h and 54 min. for ANN and 43 min./channel for BGM.
(7)
The message access time is less than 1 second.
(8)
The number of messages are 500 max.
(9)
The BGM has 4 channels.
(10)
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