Operation Manual Part 1

Digital Liquid Cooled UHF
TV Equipment
Detailed operational description
9946 V1
45321648.01 104 A E
preliminary
25 / 131
Numéro / Number Doc. Rev. Lan
g
u.
16/06/2006
Pa
g
e
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
* AMPLIFIERS
<
* : These transmitter units are self-protected (1) : Multiplex card N°1 only (2) : Only on multiplex card N°1
* AMPLIFIER
POWER
SUPPLY
Power supply on/off
Input liquid temperature
Amplifier power supply
status signals
Power amplifier
status signals
Multiplex card status
signals
Command
control
system
DISPLAY
CONTROL
SYSTEM
LOG BOOK
CONTROL
SYSTEM
CENTRAL PROCESSING
UNIT
FAULT PROCESSING
COMMAND
CONTROL
SYSTEM
(see previous
figure)
TRANSMITTER
UNITS
LOG BOOK
TERMINAL
LOCAL
CONTROL
PANEL OR
REMOTE USER
INTERFACE
Multiplex
card fault
FILTER UNIT COOLING
SYSTEM
Pressure fault
Status data from selected exciter
On-air/off-air override
Status data from reserve exciter
*
EXCITER(s)
Return wave
Probes RF
SWR/AMPLIFIER
OVERDRIVE FAULT
SWR fault
Overdrive
fault
Reset faulty amplifier
Number
of faulty
amplifiers
> N1
- 3dB command
- 6dB command
T
Transmitter off-air
T
FAULT
ANALYSIS
05/009 (e)
AUTOMATIC ON-AIR/OFF-AIR SWITCH
Transmitter On-air switch
B MPEG missing A MPEG missing
Transmitter Off-air switch
Yes
No
Exciter MPEG present on antenna Exciter MPEG missing on antenna
SYNTHESIZER
Synthesizer unlocked
Automatic changeover aiready performed
SYNTHESIZER RE-SETTING
Synthesizer frequency
re-setting
&
Input liquid temperature
Input liquid
temperature fault
- 6dB command
SWR ≥2
antenna
MAINS
DISTRIBUTION
PANEL
EXTERNAL COOLING
SYSTEM
Output liquid temperature
(2) (2) (2) (2) (1)
Station protection system
Cabinet protection system
MULTIPLEX CARD(S)
Command
On-air/off-air
override
from
exciter(s)
On-air
Off-air
INTERNAL COOLING SYSTEM
INTERNAL COOLING
SYSTEM
Loss of mains phases
Mains isolator open
(2)
PUMP fault
Liquid flow alarm
(2)
Loop protection system
(2)
Liquid flow fault
Cooling power supply missing
RW signal
SWR antenna
fault
SWR ANTENNA
FAULT
- 3dB
- 6dB
Tx off -air
Input signal fault MPEG
MPEG Abs.
Pilot Abs.
On Exciter
1
1
Pilot fault 10MHz-1PPS
Exciter pilot fault Input signal fault
Change over manual
Maintenance mode
&
&
AUTOMATIC EXCITER CHANGE OVER
Exciter fault
Exciter fault
Automatic changeover aiready performed
Figure 6 : Fault processing