User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD System Description
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 1 13
drawer and supplies the needed drive level to produce the 250 Watts output of
the system. The control and operating parameters of the 250 Watt Amplifier
Drawer are displayed on the LCD Screen on the driver drawer. In the 250 Watt
amplifier drawer, the RF input signal is at J1 on the rear panel of the drawer that
is cabled to J1 on the amplifier pallet. In a standard 250 Watt amplifier drawer, a
single +42VDC power supply provides the operating voltages, through the
current metering board, to the amplifier pallet. In a N+1 250 Watt amplifier
drawer, two +42VDC power supplies are diode-ord and provide the operating
voltages, through the current metering board, to the amplifier pallet. If one
power supply should malfunction, the other power supply will maintain the
necessary voltage to provide the 250 Watts output. The amplified output of the
pallet, which has approximately 15 dB gain, is connected to J2 the 7/16” (1.1cm)
Din RF output jack of the drawer. An output detector board supplies a forward
and a reflected power sample to the amplifier control board for metering and
monitoring purposes.
The standard CU1TD/RD-2 ATSC system is made up of a driver drawer and a 400
Watt Amplifier Drawer. The driver drawer output connects to the 400 Watt
Amplifier drawer and supplies the needed drive level to produce the 400 Watts
output of the system. The control and operating parameters of the 400 Watt
Amplifier Drawer are displayed on the LCD Screen on the driver drawer. In the
400 Watt Amplifier Drawer, the input RF signal at J1, located on the rear panel of
the drawer, is fed to J1 on the Splitter Board, which supplies two outputs, one to
each 888 amplifier pallet. Each amplifier pallet has approximately 14 dB gain.
The amplified outputs of the pallets are combined in the 2 Way combiner board
whose output is at J1. The RF is connected to J2 the 7/16” (1.1cm) Din RF
output jack located on the rear panel of the drawer. The 2 way combiner board
supplies a forward and a reflected power sample to the amplifier control board for
metering and monitoring purposes. In a 400 Watt amplifier drawer, the typical
sample value at J6, a 50Ω BNC jack located on the front panel of the drawer, is
approximately 65dB down from the output power level of the drawer.
The CU500 ATSC system w/two dual 888 pallets and Axciter is made up of a
CU30 w/Axciter Drawer and a 500 Watt Amplifier Drawer w/two dual 888 pallets.
The CU30 w/Axciter is used as a driver that connects to the CU500 Amplifier
drawer and supplies the needed drive level to produce the 500 Watts output of
the system. The control and operating parameters of the 500 Watt Amplifier
Drawer are displayed on the LCD Screen on the CU30 Drawer. In the CU500, the
input RF signal at J1, located on the rear panel of the drawer, is fed to J1 on the
2 Way Splitter Board, which supplies two outputs, one to each 888 amplifier
pallet. Each amplifier pallet has approximately 16 dB gain. The amplified
outputs of the pallets are combined in the 2 Way combiner board whose output is
at J1. The RF is connected to J2 the 7/16” (1.1cm) Din RF output jack located on
the rear panel of the drawer. The 2 way combiner board supplies a forward and
a reflected power sample to the amplifier control board for metering and
monitoring purposes. In a CU500, the typical sample value at J6, a 50Ω BNC
jack located on the front panel of the drawer, is approximately 65dB down from
the output power level of the drawer.
The CU1TD/RD-3, 750 Watt ATSC system is made up of a driver drawer and a
750 Watt Amplifier Drawer. The output of the driver drawer connects to the
Amplifier drawer and supplies the needed drive level to produce the 750 Watts
output of the system. The control and operating parameters of the amplifier