R.V.R. Elettronica TX10000U-KLC, Руководство пользователя и техническое руководство

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ELETTRONICA
Rev. 2.0 14/05/2015
25
User & Technical Manual
TX20000U-KLC
5.3 Phase ADJ
It ‘a resonant circuit “LC” with capacitors on the back of the front panel (Figure 5-17).
It ‘a resonant circuit “LC” with capacitors on the back of the front panel (Figure 5-17).
The purpose of this circuit is to reduce the power on the dummy load connected to the dialer,
varying the phase of input signal to each RF module 5 Kw.
The calibration of this circuit is done during testing, but the working conditions by connecting
the transmitter to the antenna may require a revision, in which case proceed as described.
The section that interests us is the PHASE ADJ 1 A1 and regulations with regard to the first
RF module, A2 for the second, A3 for the third and A4 for the fourth.
Turn off modules n° 3 and 4, using the breakers located to their left, and make adjustments
on Modules 1 and 2
1) Insert the screwdriver into the 1 st hole, and rotate 180 degrees clockwise (Pull out the
screwdriver) and check the value of the power “Unbalanced” in the service menu (note: the
contact of the screwdriver with the circuit “LC” to bring information out of the norm , so the
readings must be examined in private screwdriver excerpt)
2) If you obtained a decrease in the value of unbalanced power, go to the second capacitor
at the 2 nd hole and also rotate 180 degrees clockwise (go to step 3).
2a) If you obtained a increased rather than decreased power unbalanced to rotate the cap
(1° hole) counter-clockwise 360 degrees (180 ° to return it to its starting position to + 180 ° to
correct the phase) go to second capacitor at the 2 ° hole and also rotate 180 ° in a counter-
clockwise (go to step 3).
3) If the steps set out in paragraph 1 and 2 are not yet sufficient to pass the capacitors of the
second RF module (3 rd and 4 th hole), but this time the rotations of the capacitors will be in
the opposite direction those made for the holes 1 and 2.
Caution: the second pair of capacitors (3 and 4) must move in the opposite direction
to the first.
Figure 5-17
1° hole
2° hole
3° hole
4° hole
5° hole
6° hole
7° hole
8° hole