TRANSIENT ELECTROMAGNETICS PROGRAM
Section 12, Page 43 October 2002
SAMPLE PERIOD: 1.2 MICROSECONDS, SHALLOW APPLICATIONS
Zero Delay After Current Turnoff
WINDOW POINTS WINDOW WINDOW WIDTHS
#'S PER WINDOW CENTERS BEGINNING END
1 1 0.0 u sec 0.0 u sec 0.0 u sec
2 1 1.2 1.2 1.2
3 1 2.4 2.4 2.4
4 1 3.6 3.6 3.6
5 1 4.8 4.8 4.8
6 1 6.0 6.0 6.0
7 1 7.2 7.2 7.2
8 2 9.0 8.4 9.6
9 2 11.4 10.8 12.0
10 2 13.8 13.3 14.5
11 2 16.3 15.7 16.9
12 3 19.2 18.1 20.5
13 3 22.9 21.7 24.1
14 4 27.0 25.3 28.9
15 5 32.4 30.1 34.9
16 6 39.0 36.1 42.2
17 7 46.8 43.4 50.6
18 8 55.9 51.8 60.2
19 9 66.1 61.4 71.1
20 11 78.1 72.3 84.3
21 14 93.0 85.6 101.2
22 17 111.6 102.4 121.7
23 20 133.8 122.9 145.8
24 24 160.2 147.0 174.7
25 29 192.0 175.9 209.7
26 35 230.4 212.3 251.8
27 42 276.6 253.0 302.4
28 50 331.8 303.7 362.7
29 59 397.3 363.9 433.8
30 70 474.7 435.0 518.1
31 85 567.7 519.4 620.6
To demonstrate how to determine the actual window times, we will use the 20 meter loop
parameters as an example: add the Tx delay (1.5 us) plus the antenna delay (2.0us) plus the
antialias filter delay (1.0us) = 4.5us. The first sample point after the Tx turnoff and delays is at
4.8us (4 x 1.2), so the first window will be at 4.8 - 4.5 = 0.3us. The next window will be 1.2 +
0.3 = 1.5us, then 2.4 + 0.3 = 2.7us, for the next window, etc.
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