RA690 Analogue CCS Systems
Overview
- The RA690 Series of CCS equipment provides an
all-analogue solution that utilises either distributed facilities
or a Central Amplifier with remote Station Boxes for crew
interface. The RA690 is extensively used in military and civil
aircraft worldwide.
Features
- Modular system design
- Customer specified configuration
- Distributed or central amplifier
configurations
- Sub-elements build up individual station
capabilities
- Selection of complexity of fail modes
available
- Qualified to RTCA DO 160, MIL-STD 704, MIL-STD
810, MIL-STD 461/462 & BS3G100
The conventional configuration
of distributed amplifiers, filters, and volume controls is designed
to ensure the most cost effective performance possible. When
configured to utilise a Central Amplifier and remote passive
Station Boxes, the single point audio is routed within the Central
Amplifier, with selection and control implemented via analogue
control lines between these major units. Both architectures are
built up using functional blocks to produce a customised
configuration for the application required. The functional blocks
include Voice Operated Switches (VOS), attenuators, power supplies,
muting and intercom override, and interface matching networks.
Facia panel engraving and
lighting details (including NVG type), switching and electrical
characteristics are configured on each Station Box type to suit the
particular requirements of the user.
Additional flexible RA690
system capability is provided by S690 Audio Selector Panels (ASPs)
and D690 Switch Boxes. The S690 ASP allows an increase in the
number of receiver audio inputs which can be accommodated. D690
Switch Boxes enhance the facilities of the microphone switching,
intercom networks and other CCS functions. Varying combinations of
Station Boxes, ASPs and Switch Boxes can be installed at each crew
position. Where required, the ASP and Switch Box functions can be
integrated within the Station Box to form a single unit.
The RA690 Series includes a
range of general purpose amplifiers and other units. These include
specially designed amplifiers to ensure systems conform to CAA
specifications 11 and 15 for Cockpit Voice Recorder and Passenger
Address systems. Additionally, existing CCS installation
performance can be enhanced with use of units providing noise
tracking level control and voice operated switching, and a power
supply for active noise reduction headsets.
The RA690 range is further
complemented by headset connection Jack Boxes and specially
configured Audio Balance Units to ensure a correct interface
between the CCS and various Tx/Rx equipments.