500 WATT RADIOBEACON TRANSMITTER
ND2000A-02X-xx0
Page
3-13
15 January 2005
WARNING
North American Type Supply
230 VAC (line-to-line)
TB1-1
Line A (115 V ac)
TB1-2
Line B (115 V ac)
TB1-3
Neutral (Not Connected)
TB1-4 Ground
European Type Supply
230 VAC (line-to-neutral)
TB1-1
Line (230 V ac)
TB1-2 Neutral
TB1-3 No
Connection
TB1-4 Ground
(f) Remove appropriate (smaller) knockout from
lower, left-hand, cable-entry hole.
(g) Install cable clamp provided in ancillary parts
kit in cable-entry hole.
(h) Route wiring from dc power source through
cable clamp, installed in step (g), to vicinity of
barrier strip TB2.
(i) Connect dc power source conductors to barrier
strip TB2 as follows:
-
Positive conductor to TB2-1
-
Negative conductor to TB2-2
(j) Firmly tighten cable clamps, ensuring wiring is
not pinched.
FIRST STAGE (INITIAL START-UP)
3.11
The first stage of the initial start-up is to
perform a visual inspection and then perform a
complete functional test/adjustment procedure as
detailed in paragraph 5.3. On completion of the
functional test/adjustment procedures, perform the
second stage procedures as detailed in paragraph 3.12.
NOTE
The transmitter was fully tested during manufacture
and subjected to an extensive burn-in period.
SECOND STAGE (INITIAL START-UP)
3.12
The second stage of initial start-up is to
connect the transmitter's output to its antenna system,
interfaced by a suitable antenna tuning arrangement
and to adjust the antenna tuning unit in accordance
with the instructions in its instruction manual. The
transmitter is used as the 50-ohm, RF signal source
and the following should be observed:
Do not turn on transmitter until requested to do so
by personnel at the antenna site. Extremely high,
potentially lethal, RF voltages are present in
antenna tuning unit when an RF signal of any level
is being applied.
(a) Verify the requirements of paragraph 3.11 have
been satisfactorily completed.
(b) Set switches to positions tabulated for
Test
Setting
in table 4-1.
(c) Connect an antenna system, interfaced by a
suitable antenna tuning arrangement, to RF
output coaxial connector J1, using a suitable 50
ohm coaxial cable.
(d) Set or verify
O/P POWER
potentiometer
A4A2R48 is set fully counter clockwise.
(e) Set
the
TEST-Power/Mod
switch to
FWD PWR
.
(f) When requested by personnel at antenna tuning
unit site, set
RF
switch to
ON
and adjust
O/P
POWER
potentiometer A4A2R48 clockwise for
an initial
FWD PWR
indication of 25 watts on the
TEST-Power/Mod
meter.
(g) Continuously monitor the forward power
indication on the
TEST-Power/Mod
meter and
adjust
O/P POWER
potentiometer A4A2R48
(side A) to control the RF output level during
adjustment of the antenna tuning unit as
requested by personnel at the antenna tuning
unit site. Do not permit the forward power
indication on the
TEST-Power/Mod
meter to
exceed 500 watts (the maximum rated carrier
power of the transmitter).
