Operation Manual Part 1

9946 V1
45321648.01 104 A E
preliminary
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Numéro / Number Doc. Rev. Lan
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u.
16/06/2006
Pa
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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.
Table of content
1. Generale description ........................................................................................7
1.1. Outline ............................................................................................................. 7
1.2. Simplifier description of transmitter............................................................. 9
1.2.1. Basic operation ............................................................................................ 9
1.2.2. Architecture................................................................................................ 10
2. Detailed operational description ...................................................................13
2.1. Introduction................................................................................................... 13
2.2. Transmission function................................................................................. 14
2.2.1. Operational description of digital exciter.................................................... 14
2.2.2. Exciter change-over................................................................................... 15
2.2.3. ASI input change-over ............................................................................... 15
2.2.4. Amplification of the RF signal .................................................................... 16
2.3. Description of the overall transmitter control system.............................. 18
2.3.1. Introduction ................................................................................................ 18
2.3.2. Polling of events data ................................................................................ 18
2.3.3. Polling of operator commands................................................................... 21
2.3.4. Command control sytem............................................................................ 21
2.3.5. Processing of faults ................................................................................... 24
2.3.6. Computing the overall quality assessment of the RF signal...................... 28
2.3.7. Data transfer between exciter and CPU.................................................... 29
2.4. User interface operation .............................................................................. 30
2.4.1. Outline........................................................................................................ 30
2.4.2. Display control system............................................................................... 30
2.4.3. Power level bargraphs on PCL.................................................................. 33
2.4.4. Log book control system............................................................................ 34
2.4.5. On/Off commands and change-over override switch ................................ 34
3. Description / Test points / Location of units ................................................35
3.1. System architecture and location of transmitter units ............................. 35
3.1.1. Location of transmitter units....................................................................... 37
3.2. Rack : SIRIUS DVB-T UHF 45321627.11 ..................................................... 39