Tauras TV4K-NICAM/A2/TXT, Руководство по обслуживанию

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m) VCO Fine L1( 0 ... 127 )
The VCO status bar at the bottom of the screen appears only if either VCO Coarse
item or VCO Fine item is selected. The VCO status is read from the Read register
of STV2248 and guides whether to Increase / Decrease the VCO registers to attain
VCO OK Status.
For doing VCO adjustment , Feed a 38.9MHZ Carrier as IF input and adjust VCO
Coarse and fine parameters to get VCO OK Status.
If the cursor is in VCO Coarse or Fine , and the display shows VCO OK status,
then pressing of “MENU” key will automatically put VCO fine to the Centre of the
+60 to -60 KHz window.
For doing VCO L1 adjustment ,Feed a 33.9 MHZ carrier as IF input and adjust
VCO Coarse L1 and VCO Fine L1 to get VCO OK Status.
If the cursor is in VCO Coarse L1 or Fine L1 , and the display shows VCO OK
status, then pressing of “MENU” key will automatically put VCO fine for L1 to the
Centre of the +60 to -60 KHz window.
When in Service-2 menu ,if “OK” key is pressed , Service-3 menu appears and the
display is as follows.
The parameters controlled in the Service-3 menu are :
a) V SAW 50 ( 0 ... 63 )
b) V SAW 60 ( 0 ... 63 )
c) V SH ( 0…31 )
d) V SC ( 0…15 )
e) V CC ( 0…15 )
f) EW VDC ( 0…31 )
g) EW AMP ( 0…31 )
h) EW SHAPE ( 0…31 )
i) EW TRAP ( 0…31 )
When in Service-3 menu ,if “OK” key is pressed , Service-4 menu appears and the
displayis as follows:
AGC Gain ( 00 ... 03 )
Option 1 ( 50 )
Option 2 ( 00 )
Option 3 ( 06 )
Option 4 ( 27 )
Option 5 ( 00 )
ST Text ( 00 ... 15 )
H POS OSD ( 001 ... 255 )
V POS OSD ( 01 ... 63 )
H POS TXT ( 001 ... 255 )