Operation Manual Part 1

Digital Liquid Cooled UHF
TV Equipment
Detailed operational description
9946 V1
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preliminary
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Numéro / Number Doc. Rev. Lan
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Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
2.3. Description of the overall transmitter control system
2.3.1. Introduction
The overall control system for the various transmitter units is supervised by the Central Processing
Unit (CPU). This control system takes the following into account:
♦ polling of the events data from the various transmitter units,
♦ polling of the operator commands,
♦ command control system,
♦ Elaboration of the global quality note
♦ processing of faults,
♦ data transfer between exciter and CPU.
♦ user interface data from:
• display control system,
• the logbook control system.
2.3.2. Polling of events data
This processing unit continuously polls the transmitted signal parameter characteristics and the status
condition data from the main transmitter units as follows:
♦ RF amplifiers,
♦ Amplifier power supplies,
♦ synthesiser,
♦ exciter(s)
♦ Multiplex card.
In addition, sensors or probes detect and transmit data on the following:
♦ liquid parameter values and associated cooling system,
♦ Mains input supply system,
♦ RF output signal (forward wave and return wave).
Every new event is detected and associated data are sent to the following systems:
♦ processing of faults,
♦ display control system,
♦ Log book control system.