User's Manual Part 1

Digital Liquid Cooled UHF
TV Equipment
Exploitation
Information contained is this document is confidential, is THOMSON property and cannot be disclosed in whatever form without prior written authorization of THOMSON.
1.6.7. Procedure for changing the frequency of the RF synthesiser
Having a so having unlocked the PCL and lready configured the system in maintenance mode and al
called up the "CONTROL MAINT Level 3" window (refer to procedures which are necessary prior to
adjusting or changing an operational parameter), carry out the following operations :
ACTIONS CONSEQUENCES
To change the
frequency
♦ In the "CONTROL MAINT Level 3"
The "NUMERICAL VALUE" appears.
window, press on the "FREQ SYNTHE
(Hz)" key.
♦ Enter the f ncy value on the window
k
Be synthesiser
F
...) are consistent with the new frequency.
♦ The value is displayed under the window title.
reque
eyboard.
IMPORTANT :
fore validating a new
frequency, make sure that the settings of all
R filters (ex. output RF filter, RF combiner,
Validation of selection
♦ Press "ENTER" to validate the entry.
The "CONTROL MAINT Level 3" window reappears.
The new frequency value is displayed in the "FREQ
SYNTHE (Hz)" key.
Cancelling the
selection
♦ Press the "CANCEL" key.
♦ The frequency value remains unchanged.
♦ The "CONTROL MAINT" window reappears.
1.6.8. ripple and shoulder threshold settings in maintenance
oulder thresholds beyond which the ADAPT
rocedures which
re necessary prior to adjusting or changing an operational parameter), carry out the following
perations :
Procedure for changing
mode
This procedure describes how to change the ripple and sh
exciter performs a correction.
Having already configured the system in local control, maintenance modes, and also having unlocked
the PCL and called up the "CONTROL MAINTENANCE Level 3" window (refer to p
a
o
ACTIONS RESULT
Changing thr
♦ Press on the message window of the
♦ on the window
The "NUMERICAL VALUE" window appears. esholds
threshold to be changed.
Enter the required value
keyboard.
The value is displayed under the window title.
Validation of selection
♦ o validate the entry.
Th TROL MAINT Level 3" window reappears.
Press "ENTER" t
e "CON
The new threshold value is displayed on the
corresponding key.
Cancelling the
♦ Press the "CANCEL" key.
Th evel 3" window reappears.
.
selection
e "CONTROL MAINT L
♦
The threshold value remains unchanged
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27/06/2006
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