GDP-32
II
INSTRUCTION MANUAL
October 2002 Section 12, Page 42
SAMPLE PERIOD: 1.2 MICROSECONDS
Zero Delay After Current Turnoff
WINDOW POINTS WINDOW WINDOW WIDTHS
#'S PER WINDOW CENTERS BEGINNING END
1 1 0.0 µ sec 0.0 µ sec 0.0 µ 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 2 7.8 7.2 8.4
8 2 10.2 9.6 10.8
9 2 12.6 12.1 13.3
10 3 15.6 14.5 16.9
11 3 19.2 18.1 20.5
12 5 24.0 21.7 26.5
13 6 30.6 27.7 33.7
14 7 38.4 34.9 42.2
15 9 48.0 43.4 53.0
16 11 59.9 54.2 66.3
17 15 75.4 67.5 84.4
18 19 95.8 85.6 107.2
19 23 121.0 108.5 135.0
20 29 152.1 136.2 169.9
21 36 191.0 171.1 213.3
22 47 240.6 214.5 269.9
23 58 303.5 271.1 339.8
24 72 381.4 341.0 426.6
25 92 479.5 427.8 537.4
26 116 604.0 538.6 677.2
27 145 760.2 678.4 851.9
28 184 957.1 853.1 1,074
29 231 1,205 1,075 1,352
30 289 1,517 1,353 1,700
31 369 1,910 1,701 2,145
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 µs) plus the antenna delay (2.0 µs) plus the
antialias filter delay (1.0 µs) = 4.5 µs. The first sample point after the Tx turnoff and delays is at
4.82 µs (4 x 1.205), so the first window will be at 4.82 - 4.5 = 0.32 µs. The next window will be
1.2 + 0.32 = 1.52 µs, then 2.41 + 0.32 = 2.73 µs, for the next window, etc.
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