LA76810A
Continued from preceding page.
Input signal
Symbol
Vlin16
Test point
23
Input signal
Test method
Bus bit/input signal
Vertical linearity@16
Y IN:
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24, line 167 and 310.
Assign the respective measured values to Va, Vb
and Vc. Calculate as follows:
Horizontal/
vertical sync
signal
PAL
Vlin16 = (Vb-Va)/(Vc-Vb)
Vertical
ramp
Line 310
Line 167
Line 24
Vertical linearity@0
Vlin0
Y IN:
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24, line 167 and 310.
Assign the respective measured values to Va, Vb
and Vc. Calculate as follows:
VLIN: 00000
Horizontal/
vertical sync
signal
23
PAL
Vlin0 = (Vb-Va)/(Vc-Vb)
Vertical
ramp
Line 310
Line 167
Line 24
Vertical linearity@31
Vlin31
Y IN:
Monitor the pin 23 vertical ramp output and
measure the voltage at line 24, line 167 and 310.
Assign the respective measured values to Va, Vb
VLIN: 11111
Horizontal/
vertical sync
23
signalwww.DataSheet4U.com
and Vc. Calculate as follows:
PAL
Vlin31 = (Vb-Va)/(Vc-Vb)
Vertical
ramp
Line 310
Line 167
Line 24
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NoA0252-28/40
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