Ribbon displays are alphanumeric displays (connected to the Situation Displays) that
provide ATC personnel with concise information on the status of various runway corridors
with regard to wind shear and microburst events. The display shows simple text messages of
the form:
32LA MBA 3MF 40K- 180 14
32LD 190 15
33LA WSA RWY 25K+ 190 17
33LD WSA RWY 25K+ 160 14
• The first line informs the controller of a microburst alert for runway 32 left at 4.8 km (3
miles) final approach. A 40 knot loss of airspeed can be expected. At the end of the line
is the measured surface wind (direction and speed in knots) at the threshold end of the
runway or from some other point on the field (depending on the availability of wind
information from an LLWAS or other source).
• The second line shows the normal display with no warning message. Only the wind is
displayed.
• The third and fourth lines show a wind shear alert (shear line) for runway 33L (approach
and departure) with an expected 25 knot gain. The threshold winds are displayed at the
end of each line.
In addition to the text messages an audio alert tone is sounded when an alert is issued. The
controller acknowledges the alert tone by pushing a button on the front of the ribbon
display.
D.7.1 Supported Ribbon Displays
IRIS Supports the following ribbon displays:
• Dale Electronics, Inc. Model ADP-250M045 (-1 for 220 V) Plasma Display Monitor/Alarm
System. This is used by the US FAA. Because of its brightness it is well-suited for tower
cab environments which have high background light.
• IRIS Virtual Ribbon Displays. This is an X-Window display which can be put on a
workstation or PC running X-Windows.
The IRIS Workstation must be licensed for ribbon display support.
D.7.2 Dale Ribbon Display Hardware Installation
Up to 8 Dale ribbon displays can be "daisy-chained" to an IRIS workstation as shown in the
following figure.
The
M
and
F
notation refers to the cable end (DB25M or DB25F).
Appendix D – IRIS TDWR Features
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Summary of Contents for IRIS
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