Nautel ATU-HP, Техническое руководство по эксплуатации

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Stage 1 of Tuning Procedure
Initial Setting of L Tuning Taps ( LOCAL control, TUNE SETUP on)
ATU-HP Technical Instruction Manual
Page 2-11
Section 2 Preparation for Use and Installation Issue 2.0
Table 2-2:
Tuning Coil Inductance Values (
μ
H)
2.5 INITIAL TURN-ON/TUNING
PROCEDURE
The tuning procedure is divided into three
stages:
1. Initial setting of L tuning taps
2. Determining antenna resistance
3. Final setting of L and R tuning taps
Check the top of each of the following
pages to determine the stage number and
other applicable information.
(a) Determine the approximate loading coil
inductance by entering the data
recorded for operating frequency (see.
2.2.6.1) and antenna capacitance (see.
2.2.6.2) into Table 2-2.
(b) Enter the inductance from step (a) into
the appropriate Table 2-6 (a-f), noting
the application and inductance range
for each. Determine the initial loading
coil tap settings. If the inductance was
not determined, use the shaded value
in the appropriate series
connection
table (e.g., 215
μ
H in Table 2-6a).
(c) Tap the loading coils L1A and L1B for
the settings determined in step (b).
See the appropriate Figure 2-12 (a-f)
for examples.
WARNING
Use extreme caution near the tuning
coils. Extremely high RF voltages, that
may arc many inches of air breakdown
path
and cause severe RF burns, are
present when an RF input of any level
is applied to the ATU-HP.
CAUTION
Wires connecting to tuning coil taps must
be dressed in a manner that will prevent
them from coming in contact with any part
of the coils other than the tap connecting
points. Arcing that may result in damage
to the coils and/or loss of tuning may
occur.
FREQUENCY (kHz) ANTENNA
CAP (pF)
190 200 250 300 350 400 450 500 550
200
3508 3166 2026 1407 1034 792 625 507 419
300
2339 2111 1351 938 689 528 417 338 279
400
1754 1583 1013 704 517 396 313 253 209
500
1403 1267 811 563 414 317 250 203 167
600
1169 1055 675 469 345 264 208 169 140
700
1002 905 579 402 295 226 179 145 120
800
877 792 507 352 258 198 156 127 105
900
780 704 450 313 230 176 139 113 93
1000
702 633 405 281 207 158 125 101 84
1200
585 528 338 235 172 132 104 84 70
1400
501 452 289 201 148 113 89 72 60
1600
439 396 253 176 129 99 78 63 52
1800
390 352 225 156 115 88 69 56 47
2000
351 317 203 141 103 79 63 51 42
2250
312 281 180 125 92 70 56 45 37
2500
281 253 162 113 83 63 50 41 33
2750
255 230 147 102 75 58 45 37 30
3000
234 211 135 94 69 53 42 34 28
3500
200 181 116 80 59 45 36 29 24