ta1360ang TOSHIBA Semiconductor CORPORATION, ta1360ang Datasheet - Page 42

• Manufacturer Part Number: ta1360ang
• Description: Ycbcr/ypbpr Signal And Sync Processor For Digital Tv, Progressive Scan Tv And Double Scan Tv
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Test Condition for Picture Quality (Sharpness) Block
Common Test Condition for Picture Quality (Sharpness) Block
Note No.
P01
P02
1.
2.
3.
4.
Black detection level shift
Black stretch amp maximum
gain
SW4 = SW5 = B, SW8~SW10 = B, SW20 = ON, SW23 = B, SW33∼SW39 = A, SW54 = OPEN
Send bus control data as preset values, turn ACB operation switching to ACB OFF (00), select Sync input (1), turn P-MODE to Normal 1(000), WPL-LEVEL to
max (111), and change subaddress (1C) to (03).
Input sync signal, which is in sync with input signal for testing except “Sweep”, to #14 (Sync input). “H-Freq.” should be the same frequency as the one of #14.
Set Y/color difference input mode to (0), sync separator level to 20 % (01), and vertical free-running frequency to 307H (110).
Characteristics
SW1
B
B
SW2
C
A
Test Conditions
SW Mode
SW3
C
A
SW7
B
B
SW56
OPEN 1.
OPEN 1.
2.
3.
4.
5.
2.
3.
4.
5.
Set SW2 to A (maximum gain), and input 500-kHz sine wave to TPA.
Adjust signal amplitude to 0.1 Vp-p on #3.
Set black stretch point 1 to OFF (000), and measure #56 amplitude V
Set black stretch point 1 to 001 (black stretch ON), and measure #56 amplitude V
Calculate GBS using a following equation.
Connect external power supply PS to #3, and monitor #2 and #56.
Set black stretch point 1 to OFF (000), and black detection level to 0 IRE (1).
Increase PS voltage from 4.95 V in steps of 1 mV. At the moment when #2 picture period (High) drops to
Low level, monitor DC difference on #56 V
Set black detection level to 3 IRE (0).
Repeat the step 3 above and monitor DC difference, V
42
GBS = 20 × og
#56 waveform
#2 waveform
l
Test Method (Test condition: V
(V
B
÷ V
A
) [dB]
B
.
V
B
CC
, V
B3
B3
= 9 V/2 V, Ta = 25 ± 3°C)
on #56.
A
.
B
.
TA1360ANG
2005-08-18