500 WATT RADIOBEACON TRANSMITTER
ND2000A-02X-xx0
Page
3-1
15 January 2005
SECTION 3
INSTALLATION AND PREPARATION FOR USE
GENERAL
3.1
This section contains the information
required to prepare the equipment site to receive the
subject transmitter and the information required to
unpack, install and prepare the transmitter for use.
3.1.1
VISUAL
INSPECTION:
It is
recommended that a visual inspection be performed
on the subject transmitter, removable modules and
associated printed wiring boards prior to installation
and applying power. Inspect for the following:
(a) Inspect all electrical components for evidence of
overheating or physical damage.
(b) Verify all fuses are the correct value and are not
defective.
(c) Inspect all solder connections for good
mechanical bond and adequate solder.
(d) Verify all wiring insulation is not pinched,
frayed, broken or otherwise damaged.
(e) Verify wire strands of wiring conductors are not
broken or otherwise damaged.
(f) Verify the chassis and printed wiring boards are
free from solder slivers and other conductive
foreign objects.
(g) Verify all integrated circuit devices are installed
and firmly seated in their sockets.
TEST EQUIPMENT
3.2
The test equipment required for initial
installation is listed in table 1-3.
SITE REQUIREMENTS
3.3
The transmitter should be installed in a
building that provides a minimum clearance on all
sides of at least four feet.
3.3.1
LIGHTNING/SAFETY GROUND:
The
transmitter site must contain a lightning/safety ground
system to protect the transmitter from lightning
induced voltage transients. Refer to the
Recommendations for Transmitter Site Preparation
booklet
.
3.3.2
ANTENNA SYSTEM:
The antenna
system must present a 50 ohm unbalanced load to the
transmitter's RF output, with a maximum SWR of 2:1.
Provision to protect the transmitter from lightning
induced voltage transients must be incorporated.
Refer to the
Recommendations for Transmitter Site
Preparation
booklet.
3.3.3
ELECTRICAL
POWER:
The
transmitter will operate from an ac or dc power
source.
3.3.3.1 AC Power Requirements:
The
transmitter will operate from a 180 to 250 V RMS, 50
Hz, (line-to-neutral) or 180 to 250 V RMS, 60 Hz
(line-to-line) ac power source, provided the mean
voltage does not vary by more than ten percent. The
ac power source must be rated at a minimum of 1200
VA. Provision must be made to protect the
transmitter from lightning-induced voltage transients.
Refer to the
Recommendations for Transmitter Site
Preparation
booklet.
3.3.3.2
DC Power Requirements:
If used, the dc
power source must be a battery bank that provides a
nominal -48.0 V dc with a constant current capacity of
20 A. The no-load voltage of the dc power source
must be in excess of -42.0 V dc for the transmitter to
turn on initially. The capacity of the dc battery bank,
in conjunction with the
Low Battery Voltage
Threshold
setting, shall dictate the length of time the
transmitter will operate. When the battery bank
voltage has decayed to below the low battery voltage
threshold (-42.0 V dc, factory setting), the transmitter
will turn off and prevent the batteries from fully
discharging. It is recommended that the DC power
source be separately fused. Provision must be made
to protect the transmitter from lightning induced
voltage transients.
