MAIN/STANDBY 125 WATT RADIOBEACON TRANSMITTERS WITH CRCU and NDDS/T
(USER SUPPLIED ENCLOSURE/CABINET)
IS02007 (Page 6)
15 February 2002
5.2.2
The transmitter which must be installed as
the '
B
' (xmtr 2) transmitter has a '
0
' as the first digit
of the first group of three numbers (ND500-
0
xx-xxx)
on its transmitter variation nameplate.
5.3 SYSTEM
INTERCONNECTION
:
Connect electrical wiring to transmitters as follows:
(a)
Connect the RG58A/U coaxial cable assembly,
provided with the transmitter system, between
the standby transmitter's RF output connector
(A7J2) and the main transmitter's RF input
connector (A7J3).
(b) Connect appropriate AC power source wiring
(115VAC, 60Hz or 230VAC 50/60Hz) to each
transmitter. If the AC power source contains a
different type of receptacle, a suitable mating
connector must be obtained and installed on the
AC power cord cables.
(c) Connect external control/monitor wiring to
TB1 and TB2 of each transmitter as depicted in
figure 1 of these instructions. Ensure wiring is
routed neatly within the enclosure and secured
by a cable clamp.
NOTE
If an external power trim control circuit is to be
used, remove or verify both power trim bypass links
(between TB2-1 and TB1-3 of each transmitter) are
removed.
If an external power trim control circuit is not used,
install or verify a power trim bypass link is installed
between TB2-1 and TB1-3 of each transmitter.
(d) If required, connect ATU control wiring to
TB2 of each transmitter as depicted in figure 1
of these instructions. Ensure wiring is routed
neatly within the enclosure and secured by a
cable clamp.
(e) Connect a continuous, insulated, 4AWG
copper wire or one-inch copper braid between
the station lightning/safety ground and a
ground at the connection point of the antenna
feed cable's shield. Ensure this wire does not
contact any conductive surface of the
transmitter enclosure or other surfaces of the
transmitter.
(f)
If the antenna feed cable is connected:
-
directly to the main transmitter's RF output
connector (A7J2), connect the heavy gauge
safety ground wire directly to the safety ground
connection at the rear of the main transmitter.
It is not necessary to connect a ground wire to
the standby transmitter's safety ground
connection in this instance.
-
to a connector that is external to the main
transmitter (normally a cabinet that houses
both transmitters), connect the heavy gauge
safety ground wire directly to a ground
connection that is in close proximity to the
cabinet mounted RF output connector. It is not
necessary to connect a ground wire to the main
or standby transmitter's safety ground
connection in this instance.
(g) If used, connect external DC power source
wiring to TB2-9 (+) and TB2-10 (-) of each
transmitter, ensuring wiring is routed neatly
within the enclosure and secured by a cable
clamp.
(h) Install or verify the computer remote control
unit (CRCU) is installed in, or in close
proximity to, the transmitter enclosure.
(i) Ensure the CRCU's interconnect wiring has
been completed and terminated by the
appropriate connector (37-socket 'D' type).
Mate the connector to J4 of the CRCU, noting
J4 is located at the rear of the unit.
NOTE
Connect the controlling host data terminal
equipment (DTE) to the computer remote control
unit (CRCU) as described in the CRCU's instruction
manual.
(j) Connect a black, 14AWG wire between the
station lightning/safety ground and the
computer remote control unit's safety ground
(8-32 stud protruding from its rear, right-hand
corner).
(k) Connect appropriate AC power source wiring
(115VAC, 60Hz or 230VAC 50/60Hz) to the
CRCU.
