TA1310ANG
2005-09-20
52
Color difference stage
(#16 VCC = 9 V, #37 VCC = 9 V, #51 VCC = 5 V, Ta = 25 ± 3°C)
SW MODE
NOTE
ITEM
SW6
SW45 SW52 SW53
MEASUREMENT METHOD
A1
Color Difference Input
Clamp Voltage
C
A
1)
Connect the color difference input pin to AC-GND. (Set SW52A and SW53A to A.)
2)
Measure the voltage VRY of the R-Y input pin (#52) and the voltage VBY of the B-Y input pin (#53).
A2
Color Difference Input /
Output Delay Time
C
A
B
1)
Set to external color difference input mode (subaddress (05H), data (81)).
2)
Now set as follows :
Unicolor
: maximum (subaddress (00H), data (3F))
Brightness : maximum (subaddress (01H), data (7F))
Color
: center (subaddress (02H), data (40)).
3)
Set SW52A and SW53A to B. Input signal C-2 to the R-Y input pin (TP52) and the B-Y input pin (TP53)
f0 = 100 kHz, picture period amplitude = 0.2 Vp-p.
4)
Measure the signal delay time (DLRY) from the R-Y input pin (TP52) to the R output (TP13).
5)
Measure the signal delay time (DLBY) from the B-Y input pin (TP53) to the B output (TP15).
A3
Unicolor Adjustment
Characteristics
C
A
B
1)
Set to external color difference input mode (subaddress (05H), data (81))
2)
Now set as follows :
Brightness
:
maximum (subaddress (01H), data (7F))
Color
:
center (subaddress (02H), data (40))
Relative phase amplitude :
standard (subaddress (12H), data (00)).
3)
Set SW52A and SW53A to B. Input signal C-2 to the R-Y input pin (TP52) and the B-Y input pin (TP53).
f0 = 100 kHz, picture period amplitude = 0.2 Vp-p.
4)
Set unicolor to the maximum (subaddress (00H), data (3F)). Measure the RUmax, the amplitude of the R output (TP13),
and BUmax, the amplitude of B output (TP15).
5)
Set unicolor to the minimum (subaddress (00H), data (00)). Measure the RUmin, the amplitude of the R output (TP13),
and BUmin, the amplitude of B output (TP15).
6)
Calculate the unicolor adjustment characteristics uR and uB by the following formulas.
max
RU
min
RU
Log
20
uR
=
max
BU
min
BU
Log
20
uB
=
Note 1: Where the bus data are not specified, set the preset value.
Note 2: Ensure the sync signal is always input to TP38 (SYNC IN).