Page 110
1 Dec 2003
34-45-4
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
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M. Range Selection and Range Rings
The traffic advisory display range selection is controlled externally, through the data input to
the display on the ARINC 429 bus, or internally, using a front panel selector switch (PPI
weather/traffic display). The range selection can be controlled by optional front panel
pushbutton switches (TA/VSI or dedicated traffic display). The Range rings shown are a
function of range set if the range selection is made at a distance or locally. Table 22
summarizes range ring distances for each possible range that can be selected on the different
types of traffic displays available.
NOTE:
The Range selections more than 34 nautical miles are only possible on PPI
weather/traffic displays. For these displays, the range ring data in Table 22 is
applicable when the display is in the TCAS mode, which shows only TCAS data.
Table 22. Range Rings Displayed vs. Selected Range
Selected Range
(NM)
Range Rings (NM)
2
3
5
10
15
20
25
30
40
3
X
X
5
X
X
10
X
X
X
15
X
X
X
20
X
X
X
25
X
X
X
30
X
X
X
40
X
X
X
50
X
X
X
60
X
X
X
80
X
X
X
100
X
X
X
120
X
X
150
X
X
160
X
X
180
X
X
200
X
X
240
X
300
X
320
X
