January 2016
Beginner to intermediate
430 pages
22h 38m
English
Content preview from Radar and ARPA Manual
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RADAR AND ARPA MANUAL
Table 1.2 Range data - typical write and read times
Range scale
(n miles)
0.75
1.5
3
6
12
24
48
Write time
(ßs)
9.3
18.5
37.0
74.1
148.2
296.3
592.6
Read-out
(jis)
148
148
148
148
148
148
148
Sweep time
(μ*)
148
148
148
148
148
148
148
Thus,
in general, where computer storage is used to
develop a radial PPI display, the range data for each
radial line is written into memory during one timebase
of the selected range scale but is read out in a fixed time,
and displayed at a fixed sweep rate both of which are
independent of the range scale selected. The duration of
the fixed read-out time will be determined by the indi-
vidua ...
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