LX Series Digital
Chapter 2, Amplifier Assembly Description,
Power Amplifier Assembly
Maintenance & Remote Control Connections
Volume 2, Rev. 1
2-6
accomplished by combining three power
amplifier chassis assemblies, creating one
combined output, and combining the
other two power amplifier chassis
assemblies, creating another combined
output. The two combined outputs are
then combined into one output. In the
(A2) cabinet assembly, the outputs of the
(A2-A3, A2-A6, and A2-A13) power
amplifiers at the “7/16” connectors J205,
are cabled to the J1, J2 & J3 input jacks of
(A2-A7) a 3 way hybrid combiner. A 500
Watt reject load (A2-A5), that dissipates
reject power, is mounted near the top of
the (A2) cabinet facing the rear and is
connected to (J5) on the hybrid combiner.
A thermal switch (A2-A5-A1) is mounted
to the reject load and supplies an
overtemperature fault, at 175º F., to the
driver assembly at TB30-7 & 15, if a
problem occurs in the combining process
for the (A2) amplifier cabinet. Another
500 Watt reject load (A2-A8), that
dissipates reject power, is mounted next
to the other load also facing the rear of
the (A2) cabinet and is connected to (J4)
on the hybrid combiner. A thermal switch
(A2-A9-A1) is mounted to the reject load
and supplies an overtemperature fault, at
175º F., to the driver assembly at TB30-7
& 15, if a problem occurs in the combining
process in the (A2) amplifier cabinet. This
fault is in parallel with the other fault line.
The combined output of the A2 cabinet at
(A2-A7-J6) of the hybrid combiner
connects to one of the input jacks (J1) on
(A3) the 2 way combiner mounted on the
roof of the cabinets.
In the (A1) cabinet, the outputs of the
(A1-A3 and A1-A6) power amplifiers at
the “7/16” connectors J205, are cabled to
(A1-A7) hybrid combiner. A 500 Watt
reject load (A1-A18) connects to (J4) on
the hybrid combiner to dissipate reject
power. A thermal switch (A1-A18-A1) is
mounted to the reject load and supplies
an overtemperature fault, at 175º F., to
the driver assembly at TB30-7 & 15, if a
problem occurs during the combining in
the (A1) amplifier cabinet. The combined
output of the A1 cabinet at (A1-A7-J3) of
the hybrid combiner connects to the other
input jack (J2) on (A3) the 2 way
combiner mounted on the roof of the
cabinets. J4 on the combiner connects to
a 1.5 kW reject load (A1-A9), which
dissipates reject power, which is
mounted inside the cabinet facing the
rear of the (A1) cabinet. A thermal
switch (A1-A9-A1) is mounted to the
reject load and supplies an
overtemperature fault, at 175º F., to the
driver assembly at TB30-7 & 15, if a
problem occurs in the combing of the
(A1) and the (A2) amplifier cabinets.
This fault is in parallel with the other
overtemperature fault lines.
The combined output of the (A3)
combiner connects to the (A8) digital
bandpass filter for filtering before it is
connected through the (A12) low pass
trap filter, for additional filtering, to the
input of the (A11) output coupler. The
output coupler assembly supplies a
forward power sample at (A1-A44-J1)
and a reflected sample at (A1-A44-J2) to
the (A44) Dual Peak Detector Board. The
Dual Peak Detector Board supplies a
reflected power sample to TB31-13 and a
forward power sample to TB31-14 on the
exciter/driver for metering purposes.
The RF output for the transmitter is at J2
the 3-1/8” connector on the A11 output
coupler assembly.
2.1.2.6 3kW Digital Output System
Configuration
In a 3 kW system, the outputs of the six
power amplifier chassis assemblies must
be combined. This is accomplished by
combining three power amplifier chassis
assemblies, creating one combined
output, and combining the other three
power amplifier chassis assemblies,
creating another combined output. The
two combined outputs are then combined
into one output. In the (A1) cabinet
assembly, the outputs of the (A1-A3, A1-
A6, and A1-A13) power amplifiers at the
“7/16” connectors J205, are cabled to the
J1, J2 & J3 input jacks of (A1-A7) a 3
way hybrid combiner. A 500 Watt reject
load (A1-A9), that dissipates reject
power, is mounted on the roof of the
(A1) cabinet and is connected to (J5) on
Содержание Innovator L Series
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Страница 49: ...APPENDIX B DRAWING LISTS ...
Страница 52: ...APPENDIX C TRANSMITTER LOG SHEET ...