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.
1.6.9. Procedure for changing the threshold settings of the OLDC card
Note : This procedure is achieve in COFDM MODAP version only
This procedure describes how to change the central frequency rejection threshold and the I/Q
amplitude error threshold beyond which the OLDC card 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 4" window (refer to procedures which
cessary prior to adjusting or changing an operational parameter), carry out the followinare ne g
operations :
ACTIONS RESULT
Changing thresholds
♦ Press on the message window of the
The "NUMERICAL VALUE"
threshold to be changed.
♦ Enter the required value on the window
window appears.
The value is displayed under the window title.
keyboard.
Vali on
♦ date the entry.
h
The new threshold value is displayed on the
dation of selecti
Press "ENTER" to vali
T e "CONTROL MAINT Level 4" window reappears.
corresponding key.
Cancelling the
selection
♦ y.
he "CONTROL MAINT Level 4" window reappears.
Press the "CANCEL" ke
T
♦ The threshold value remains unchanged.
1.6.10. Procedure for changing RF digital power r
alarm and fault signals
This p scribes how to change digital power thre ings for triggering alarm and fault
signals on the PCL (three-colour "Alarm" indicator lamp).
aving already configured the system in maintenance mode and also having unlocked the PCL and
called up the "CONTROL MAINT Level 2" window (refer to procedures which are necessary prior to
perations :
th eshold settings for triggering
rocedure de shold sett
H
adjusting or changing an operational parameter), carry out the following o
ACTIONS RESULT
To call up the «RF
♦ In the "CONTROL MAINT Level 2"
♦
The «RF THRESHOLD»
THRESHOLD»
window of the PCL
wi w, press on the "RFTHRES" key.
window appears.
ndo
Changing thresholds
♦ Press on the message window of the
threshold to be changed.
♦ Enter the required value on the window
♦
r the window
keyboard.
♦ The "NUMERICAL VALUE" window appears.
The value is displayed unde
title.
Validation of séle
♦
♦
♦
ding key.
ction
Press "ENTER" to validate the entry.
The «RF THRESHOLD» window reappears.
The new threshold value is displayed on the
correspon
Cancelling the
selection
♦
Press the "CANCEL" key.
♦ The «RF THRESHOLD» window reappears.
♦ The threshold value remains unchanged.
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Numéro / Number Doc. Rev. Lan
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27/06/2006
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