TA1360AFG_05 Datasheet, PDF (71/110 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

Note No.
Characteristics
S02 Dynamic Y/C compensation
TA1360AFG
SW68
C
Test Conditions
SW Mode
SW67 SW66
A
A
SW64
B 1.
Test Method (Test condition: V_CC = 9 V/2 V, Ta = 25 ± 3°C)
Input 100-kHz sync signal to TP67, and set #67 amplitude to 0.2 Vp-p.
SW63
B
SW61
B
SW60
B
SW74 ^2.
OPEN
Set Y mute OFF (P-MODE: Normal 1, 000), brightness to center (1000000), color to center (1000000),
unicolor to maximum (1111111), and Y/C Gain Comp to minimum (00). Set black stretch point 1 to OFF (000),
dark area static Yγ gain to minimum (00), light area static Yγ gain to maximum (11), and SW1 to B. Apply 5.16
V to #68 from external power supply PS1.
3. Monitor #14 output waveform, and measure amplitude VBDY0.
4. Set Y/C Gain Comp to maximum (11). Set SW1 to B. Set black stretch point 1 to OFF (000), dark area static
Yγ gain to maximum (11), light area static Yγ gain to maximum (00), and monitor #14 amplitude VBDY1.
5. Set Y/C Gain Comp to maximum (11). Switch SW1 to A, and TPI to GND. Set black stretch point 1 to
maximum (111), dark area static Yγ gain to minimum (00), bright area static Yγ gain to maximum (11), and
monitor #14 amplitude VBDY2.
6. Calculate the following equations.
GC_BDY1 = 20 × log (VBDY1/VBDY0), GC_BDY2 = 20 × log (VBDY2/VBDY0)
7. Input 100-kHz sync signal to TP5, and repeat the procedure above. Calculate the following equations.
GC_RDY1 = 20 × log (VRDY1/VRDY0), GC_RDY2 = 20 × log (VRDY2/VBDY0)
71
2005-08-18