Nautel XL12, Technical Instructions

Page: 84 / 238

12 000 WATT AM BROADCAST TRANSMITTER
XL12
Page 3-23
01 January 2002
Table 3-4 RF Drive Stage Controls and Indicators
PANEL MARKING/
REF FIG NOMENCLATURE FUNCTION
DES NO. USED IN TEXT
A11A4DS1 MD-11
+15V
When turned on, ind15 VDC is being applied to the
control circuit of exciter A's regulated DC power supply
(A11A4).
A11A4R3 MD-11
VOLTAGE CONTROL
Adjusted to set the DC output voltage of exciter A's
regulated DC power supply (A11A4) to ensure the RF
power modules have an adequate RF drive signal.
A11A5DS1 MD-11
+15V
When turned on, ind15 VDC is being applied to the
control circuit of exciter B's regulated DC power supply
(A11A5).
A11A5R3 MD-11
VOLTAGE CONTROL
Adjusted to set the DC output voltage of exciter B's
regulated DC power supply (A11A5) to ensure the RF
power modules have an adequate RF drive signal.
A11L1 MD-8
L1
Used in tuning the RF drive to the RF power modules. Link
installed between
C
and
H
for RF frequencies from 530kHz
to 1100kHz. Link installed between
J
and
D
for RF
frequencies from 1101kHz to 1710kHz.