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ARINC 568 DME TEST
SIMULATION CARD |
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ARINC 568 DME Test and
Simulation Card |
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The ARINC568 Distance Measuring Equipment
Test Simulation card and software provides an easy method for testing
and verifying the correct operation of Distance Measuring Equipment
(DME) display units.
The product consists of a WindowsTM GUI package to enable
ease of conducting the various required tests without the need to have
an in depth knowledge of the ARINC interface, and a PCI ARINC568
transmitter card.
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The DME Interface Test card is
designed to
simulate the six-wire ARINC568 interface
employed by DME display equipment.
As per the ARINC 568 specification, this interface consists of a clock,
synchronization and data signals.
The card is a full “plug and play”
product and is
compliant with the PCI standard version 2.1.
The transmission bit rate is variable under software
control over the
frequency range of 7.0kHz to 14.0kHz. The output amplitude of the
resultant waveforms is
fixed at 10V peak-peak. Label 201 is transmitted at
a fixed repetition rate of 50mS.
The ARINC568 signals are brought out via a 37-way filtered "D"
socket connector.
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GUI
Software
The PC
software has been designed for use on any Pentium PC with a PCI bus
running
Microsoft Windows™ 98/NT4/XP (later operating systems will also be
supported).
The supplied GUI Application software provides full control over the
data values that
can be transmitted and includes a variety of
automatic tests that can be performed.
Tests
Provided
SSM
A Special Status Matrix combo box allows for the selection of up to
four different
operational designations. These are:
• 00 - Valid Data,
• 01 - Functional Test,
• 10 - No Computed data and
• 11 - Not Assigned.
FREQUENCY SWEEP
A test to automatically sweep the transmitted data word bit rate from
7.0kHz to 14.0kHz and back again has been provided to check the
bandwidth reception of the DME unit under test. Dragging the slider
provided also provides manual sweep control of this frequency.
SPOT DISTANCE VALUE SELECTION
A drop down box is provided that allows for the selection of popular
spot distance values. User defined values are also permitted in this
box.
RAMPING SPOT DISTANCE VALUES
This test allows for a ramp of transmitted spot distance values.
The
starting value for the ramp is entered into the "Select Spot
Distance" box and the ramp is then initiated by clicking a
<Run Ramp> button.
DECADE RAMP TEST
A test to check for sticking adjacent decade wheels on the DME unit
under test. This test again starts from the starting value entered and
will cycle each digit in turn through 0 to 9.
VARIABLE RAMP STEP TIME
The rate of the ramp step increment can be varied between 50mS to 1
second by setting the value in the "Set Ramp Increment" box.
TRANSMITTED VALUE
The transmitted value is always displayed in the panel provided.
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PCI-A568T1
SPECIFICATION
ARINC568 - Label 201 DME Signal source.
Simulation of Spot Distances from 000.0 to 399.9 miles.
Automatic Ramping of Spot Distances.
Automatic 7 to 14kHz bit rate Frequency Sweep.
Variable Ramp Step times.
Intuitive easy to use Windows software.
PCI half-length interface card.
Commercial operating temperature range 0 to 70 ºC.
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All units are designed to meet the
European and US EMC
regulations.
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