Vector-LP Radio Beacon Transmitter Technical Instruction Manual
Page
2-17
Section 2 Preparation for Use and Installation
Issue 1.1
2.4 COMMISSIONING
The following procedures are in a step-by-
step format. They permit a person who is
not familiar with the transmitter to perform
required checks. Complete the
procedures in sequence. The transmitter
is calibrated and burned-in during
manufacture. Unless otherwise specified
you should not need to make any
adjustment. If the tests associated with a
procedure indicate the pre-set
adjustments are not optimum, perform the
appropriate adjustment procedure detailed
in
Section 4,
Testing and Adjustment
prior
to proceeding with additional tests.
2.4.1 Precautions
The transmitter contains many solid state
devices that can be damaged by
excessive heat or high voltage transients.
Read and observe the precautionary
information in Section 3 - Operating
Instructions prior to applying power.
2.4.2 Turn-On Prerequisites
Complete the following steps to verify the
transmitter is ready to turn on:
(a) Ensure that the RF filter PWB (A14) is
tuned for the desired frequency (see
Table 2-7a for standard frequencies
between 190 and 535 kHz or Table
2-7b for extended frequencies
between 536 and 1250 kHz or
between 1600 and 1800 kHz).
WARNING
If there is a jumper between TB1-19
and TB1-20 on remote interface PWB
A3, safety features controlled by the
external interlocks will be disabled.
Implement a fail-safe method to alert
personnel to this fact. Dangerous
voltages are present on RF output
stages and the antenna system if the
transmitter is on.
(b) Close all external interlocks or
connect a temporary jumper wire
between TB1-19 and TB1-20 of the
remote interface PWB (A3).
2.4.3 Initial Turn-On
Ensure that all connectors on the back of
the transmitter and the back of the front
panel are securely fastened. If there are
any loose connectors, ensure they are
mated according to the connector’s
labeled tag.
(a) Switch the ac power switch on the
back of the transmitter to
ON
.
(b) Verify that the GUI on the front panel is
on and displays legible text.
(c) Select local control by pressing the
Control – Local
button.
(d) Confirm that the System Diagram’s
Control - RF Off
and
Local
lamps are
on. Confirm that the amber LEDs in the
RF power modules are all flashing.
(e) Set the
Requested Power Source
to
AC
(see 3.6.9).
(f) Clear
the
Events Log
(see 3.6.5).
(g) For dual side transmitters only, ensure
the transmitter’s main side is set to
B
or and the monitor mode is set to
BYPASS
(see 3.6.4).
(h) Reset the alarm status (see 3.6.3). The
pre-existing alarms should clear.
(i) There should be no alarms indicated
on the System Diagram or GUI.
(j) Connect the transmitter’s RF output to
a 50
:
dummy load rated for twice the
transmitter’s maximum output power.
(k) In the Test Standby Side menu (see
3.6.13.4), select
Run All Tests
. Each
test should take about 20 s.
OK
should be displayed.
(l) For dual side transmitters only, set the
transmitter’s operating side to
A
(see
3.6.4). For single side transmitters,
skip to step (n).
