Nautel XL12, Technical Instructions

Page: 62 / 238

12 000 WATT AM BROADCAST TRANSMITTER
XL12
Page 3-1
01 January 2002
SECTION 3
CONTROLS AND INDICATORS
GENERAL
3.1
The following section is intended to
familiarize operators and maintainers with the various
controls and indicators contained in the transmitter.
CONTROL/MONITOR PANEL CONTROLS
AND INDICATORS
3.2
Table 3-1 identifies controls and/or indicators
on the control/monitor panel. The table identifies the
panel marking, or when there is no marking, the
nomenclature used in text, the reference designation
assigned to each item and a description of each
control/indicator's purpose/ function. Refer to figure
MD-1 for the location of the control/monitor panel.
Refer to figure MD-3 for the location of and
reference designations for the system control PWB
(A1A3), the volt meter control PWB (A1A2), the
power meter control PWB (A1A1), and the remote
interface PWB (A1A4).
NOTE
Alarms on the control/monitor front panel are bi-
colour lamps. When red is displayed, the
associated alarm has been tripped. Otherwise,
the indicators will glow green.
EXCITER PANEL CONTROLS AND
INDICATORS
3.3
Table 3-2 identifies controls and/or indicators
on the exciter panel. The table identifies the panel
marking, or when there is no marking, the
nomenclature used in text, the reference designation
assigned to each item and a description of each
control/indicator's purpose/function. Refer to figure
MD-1 for the location of the exciter panel. Refer to
figure MD-6 for the location of the exciter interface
PWB (A2A1), RF drive PWBs (A2A1A1,
A2A1A4), interphase PDM drive PWBs (A2A1A5,
A2A1A6), DC power supply PWBs (A2A1A2,
A2A1A3) and optional C-QUAM AM stereo exciter
PWB (A2A2).
RF DRIVE TUNING PWB CONTROLS
3.4
Table 3-3 identifies controls on the RF drive
tuning PWB (A11A2). The table identifies the panel
marking, or when there is no marking, the
nomenclature used in text, the reference designation
assigned to each item and a description of each
control's purpose/function. Refer to figure MD-8 for
the location of the RF drive tuning PWB.
RF DRIVE STAGE CONTROLS AND
INDICATORS
3.5
Table 3-4 identifies controls and/or indicators
in the RF drive stage, including power supply
assemblies A11A4 and A11A5 and RF tuning
inductor A11L1. The table identifies the panel
marking, or when there is no marking, the
nomenclature used in text, the reference designation
assigned to each item and description of each
control/indicator's purpose/function. Refer to figure
MD-8 for the location of the associated
part/assembly.
AC/DC POWER SUPPLY CONTROLS AND
INDICATORS
3.6
Table 3-5 identifies controls and/or indicators
in the AC/DC power supply stage, including AC/DC
power supply assembly A23, DC power supply PWB
A28 and DC power supply monitor PWB A29. The
table identifies the panel marking, or when there is no
marking, the nomenclature used in text, the reference
designation assigned to each item and description of
each control/indicator's purpose/function. Refer to
figure MD-2 to locate the DC power supply PWB or
the DC power supply monitor PWB and to figure
MD-23 for the location of the power supply
assembly.