User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD System Description
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 1 11
System Description
The Innovator CX Series Systems are of two different types. They are either
Regenerative Translators, example: CU3RD, or DTV Transmitters, example:
CU3TD. The Regenerative Translator (RD) accepts an RF On Channel signal (-79
to –8 dBm) and converts it to a DTV RF On Channel output signal. If an optional
preamp is present in your system it connects to the output of the receive antenna
and amplifies the weak signal approximately 20 dB. The DTV System (TD) takes
a SMPTE-310 Input and converts it to a DTV RF On Channel output signal. The
SMPTE-310 input can be from an ASI to S310 converter, a K-Tech Receiver
Drawer, an Axciter Drawer, a Universal Modulator Drawer or any other SMPTE-
310 source. The output power level of either configuration is at 5, 30, 50, 100 or
150 Watts ATSC using a single drawer, at 250, 400 or 750 Watts ATSC using an
additional single amplifier drawer, at 1400 Watts ATSC with two Amplifier
drawers, at 2100 Watts ATSC with three Amplifier drawers, or at 2500 Watts
ATSC with four Amplifier drawers.
The Innovator CX Series system provides linear and nonlinear correction
capability for the transmission path as well as internal test sources that are used
during initial system installation. If your system contains the Optional Internal
GPS Kit, the output of the GPS Antenna connects to the J5 TNC connector on the
rear panel of the CXB drawer. This kit supplies 10 MHz and 1 pps references for
use in the CXB drawer.
The CU0TD-1 thru CU0TD-5 Innovator CX Series systems and the same drawer
used as driver for higher power transmitter systems contain the Digital Modulator
w/Power Conditioner (1309629) that is made up of (A2) the Digital Modulator
Board (1304883) and (A22) the Power Conditioner Board (1309404). The drawer
also contains (A3) the IF Precorrector Board (1308796), (A4) the Frequency Agile
Upconverter (1309695), and (A6) the Amplifier Assembly. The (A7) Output
Detector Board (1312207), (A8) the Innovator CX Control Board (1312543), (A9)
the +5V, ±12V Power Supply and (A10) the +24V/+28V/+32V/+39V/+48VDC
Power Supply are also contained in the drawer. To make the system a
regenerative translator, the RD kit (1310182) supplies the (A1) 8 VSB
Demodulator Board (1308275) to the drawer.
The type of (A6) Amplifier Assembly used in the drawer changes as the output
power of the system changes. The Amplifier Assembly (1309621) is used in
CU0TD/RD-1 systems, the Amplifier Assembly (1312566) is used in CU0TD/RD-2
and CU0TD/RD-3 systems and the Amplifier Assembly (1312191) is used in
CU0TD/RD-4 and CU0TD/RD-5 systems and the Amplifier Assembly (1315009) is
used in CU0TD/RD-4 and CU0TD/RD-5 systems with Axciters. The Amplifier
Assembly (1315381) is used in the CUBE888A-2 and the CUBE888A-2 w/8 VSB
Demodulator Board drawers. Also part of the amplifier assemblies are an ALC
Board (1315006, used with Axciter systems or 1308570, used with all other
systems).
The (A10) Power Supply Assembly also changes as the output power of the
system changes. A +24V Power Supply is used in CU0TD/RD-1 systems, a
+28V/300W Power Supply is used in CU0TD/RD-2 Systems, a +36V/600W Power
Supply operating at 30V is used in CU0TD/RD-3 systems and a +48V/1100W
Power Supply operating at 48V is used in CU0TD/RD-4 and CU0TD/RD-5
systems.