User's Manual

Innovator CU5-1800BTD/BRD ATSC Transmitter/ Board Descriptions
Regenerative Translator
Instruction Manual, Rev. 0 57
J5-8 on the control board. The +5VDC is produced when AC is connected to the tray
and the CB1 and/or the CB2 circuit breakers are turned On. Either or both power
supplies provides the +5VDC for use by the control board.
The +42VDC needed by the amplifier modules on the heatsink assembly is generated by
the (A8 & A9) power supplies. The power supplies will operate when AC is connected to
the tray, the CB1 circuit breaker for the (A8) power supply and the CB2 circuit breaker
for the (A9) power supply, are turned On and a Low is provided on the Inhibit Line that
connects to J1-6 on the power supplies from the control board. The CB1 circuit breaker
supplies the AC to the (A8) power supply which provides the +42VDC to the (A1) and
(A2) 878 amplifier pallets. The CB2 circuit breaker supplies the AC to the (A9) power
supply which provides the +42VDC to the (A3) and (A4) 878 amplifier pallets.
(Optional) ASI to S310 Converter Module
NOTE: Used only with STL ASI feed inputs.
The ASI to SMPTE310M converter takes the STL ASI feed input, if present in your system,
and converts it to a SMPTE310M output which connects to the input to the Axcera system.
The converter contains an ASI Motherboard (1311179), an ASI to 310 Conversion Board,
Non-SFN (1311219), and a 120 VAC to +12 VDC converter module.
ASI Motherboard (1311179)
The ASI motherboard takes the +12 VDC, from the 120 VAC to 12 VDC converter
module, and converts it to +5 VDC and +3.3 VDC which are used by the ASI to S310
conversion board.
U1 is a regulator IC that supplies an output of +5 VDC at J2-7 that connects to the ASI
to 310 converter board. U2 is a regulator IC that supplies an output of +3.3 VDC at J2-
11 that connects to the ASI to 310 converter board. Also +12 VDC is wired to J2-3 that
connects to the ASI to 310 converter board.
The ASI motherboard is the mounting platform for the four LEDs that are displayed on
the front of the module. The LEDs will be Green if everything is OK or Red if the
indicated function is malfunctioning. The LEDs are Power, which indicates +12 VDC is
connected to the converter, FIFO ERROR, which indicates an overflow or underflow
condition in the input buffer, S310 Lock, which indicates the converted S310 signal is in
a locked condition, and ASI Lock, which indicates the recovered ASI signal is in a locked
condition.
ASI to 310 Conversion Board, Non-SFN (1311219)
The ASI signal is input to the ASI to S310 conversion board via J1. U2 de-serializes the
ASI input signal into a parallel byte stream. The parallel byte stream is clocked into U6
which buffers and converts it to a valid S310 bi-phase encoded signal. Null packets are
added or dropped during this process to obtain the valid 19.393 Mb/s output. U6 is also
responsible for re-stamping the PCR clock. The final S310 output of the board is at J5.