PVDL
is a fully portable implementation of the physical and link layers of VDL Mode 2 - the VHF
Data Link as specified by the ICAO SARPS and ARINC Characteristic 631 and 750. PVDL
actively tests and passively monitors VDL Mode 2 systems behaviour and performance.
The PVDL System consists of two principal entities:
- Hardware: Mini-VDR, VHF Transceiver
- Software : PVDL Ground Station & Aircraft Software
As an alternative to the PVDL engineering style tool, ADS has developed a
Multi-Protocol Ramp Test set (MPRT) which is designed to
provide go-no-go testing of aircraft installed communications systems, such as ACARS and
VDL Mode 2. In addition to testing the communications protocols, the MPRT also
provides the capability to confirm connectivity through to onboard peripherals such as
printers and MCDU's.
Hardware
At 50mW RF output power, the Mini-VDR can be
viewed as a signal generator/analyser or as a low power VDL transceiver. The
tuning range covers the full aviation VHF band from 108 - 137Mhz. For VDL Mode 2,
its use is restricted to 118 - 137Mhz. The navigation band frequencies enable the
system to be used in GNSS LAAS system applications.
PVDL - Portable VDL Software
The PVDL software loads onto any Windows7/
Vista/XP/2000 or NT PC. This software accommodates the DLE and VME software layers that
emulate either an Aircraft or a Ground Station in accordance with VDL2 AVLC protocols.
Operational emulation of the higher network and application layers is also available.
MVDL - Mobile VDL Test System
The MVDL integrates the Mini-VDR into a ramp test set style case for fully
portable/mobile operation. The MVDL includes the operating PC plus batteries and power
supplies.
The MVDL enables the testing and diagnostics to be performed where the action is - for
example at the ground station site or at the aircraft test location.
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