TA1276AFG Datasheet, PDF (45/83 Pages) Toshiba Semiconductor – PAL/NTSC Video Chroma And Deflection IC For CTV

Note
Parameter
V₁₄
2T Pulse Response SRT
Control
TA1276AFG
Test Conditions (unless otherwise stated, V_CC1 = 5 V, V_CC2/V_CC3/DEF V_CC = 9 V, Ta = 25 ± 3°C)
Switching Mode
SW₁₅ SW₄₉ SW₅₀ SW₅₃
Test Conditions
1) Set the BUS control data to the preset value.
2) Input a 2T pulse (STD) signal to TP78, turn the Y mute off (1), turn the video mute off (0), set unicolor to maximum
(1111111), and set SHR tracking to SRT-gain low (11).
3) Set the sharpness control to the center (1000000), set the aperture compensator peak frequency to 4.2M (001),
connect TP11 and TP15b, and observe TP15a.
C
ON
B
4) Measure T_SL1 as in the diagram below.
5) Set SHR tracking to SRT-gain high (00) and measure T_SL2.
6) Next, set the aperture compensator peak frequency to 7.7M (111) and measure T_SH1 and T_SH2 as above.
7) Calculate the following formula.
T_SRTL = T_SL1 − T_SL2
A
T_SRTH = T_SH1 − T_SH2
10%
10%
T_S**
100%
45
2002-04-01