TA1310ANG Datasheet, PDF (47/106 Pages) Toshiba Semiconductor – NTSC VIDEO, CHROMA, DEFLECTION, AND DISTORTION COMPENSATION IC (WITH YUV INTERFACE AND ACB)

Chroma stage
NOTE
ITEM
C₁ ACC Characteristics
C₂
Color Difference Output
Level
C₃
Color Difference Output
Relative Amplitude
SW MODE
SW₄₅ SW₄₆
1)
(#16 V_CC = 9 V, #37 V_CC = 9 V, #51 V_CC = 5 V, Ta = 25 ± 3°C)
MEASUREMENT METHOD
Input a rainbow signal (signal C-1) to the chroma input pin (TP45).Burst : chroma = 1 : 1
B
ON
2)
When the chroma input amplitude levels are set to 10, 30, 300, and 600 mV_p-p, measure the output
amplitudes va10, va30, va300, and va600 of the R-Y output pin (TP48).
3) Calculate A = va30 / va600.
1) Input a rainbow signal (signal C-1) to the chroma input pin (TP45).
Burst : chroma = 300 mV_p-p : 300 mV_p-p
2) Change the burst phase so that bar 2 of the B-Y output pin (TP47) output waveform is the bottom peak
B
ON
and bar 7 is the top peak.
3) Measure the amplitude (v_B) of the B-Y output pin (TP47).
4) Set the burst phase to 180°.
5) Measure the amplitude (v_R) of the R-Y output pin (TP48)
1) Calculate the relative amplitude v_RB from the following formula using the values obtained in steps 3) and
B
ON
5) of C₂ above.
v_RB = v_R / v_B
1) Input a rainbow signal (C-1) to the chroma input pin (TP45).
Burst : chroma = 200 mV_p-p : 200 mV_p-p
2) Calculate the demodulation angles θB_cnt and θR_cnt of the B-Y output pin (TP47) and the R-Y output pin
(TP48) using the formulas and diagram below.
C₄
Color Difference Output
Demodulation Angle
B
ON
TA1310ANG
C₅
Color Difference Output
Relative Phase
B
ON
① Calculate the relative phase θ_RB from the following formula using the values obtained in C₄ above.
θ_RB = θ_Rcnt − θ_Bcnt
Note 1: Where the bus data are not specified, set the preset values.
Note 2: Ensure the sync signal is always input to TP38 (SYNC IN).
47
2005-09-20