TA1316AN Datasheet, PDF (54/115 Pages) Toshiba Semiconductor – YCbCr/YPbPr Signal and Sync Processor for Digital TV, Progressive Scan TV and Double Scan TV

TA1316AN
Test Conditions for Luminance
Common Test Conditions for Luminance
(1) SW4 = SW5 = B, SW7 = OPEN, SW8~SW10 = B, SW20 = ON, SW23 = B, SW33∼SW39 = A, SW54 = 54 = ON
(2) After sending bus control data with preset values, set ACB MODE to off (00) and SYNC INPUT-SW to sync input (10).
(3) Input sync signal [signal in sync with input signal used for testing, except for sweep signal] to pin 14 (SYNC IN). Set horizontal frequency to that of pin 14.
(4) Set pin 7 to open, Y/color difference signal input mode (YUV INPUT MODE) to Through (10), SYNC SEP-LEVEL to 20% (01) and vertical free-running frequency
to 307H (110).
Note No.
Parameter
P01 Black detection level shift
Test Conditions
SW mode
SW1 SW2 SW3 SW56
Test Method (test conditions: V_CC = 9 V/2 V, Ta = 25° ± 3°C)
B
C
C OPEN (1) Connect external power supply (PS) to pin 3 and monitor pins 2 and 56.
(2) Set black stretch point 1 to off (000) and black detection level (BDL) to 0 IRE (1).
(3) Increase PS voltage from 4.95 V in 1-mV steps. When pin 2 picture period (High) goes Low, measure pin 56
DC differential V_B.
(4) Set black detection level (BDL) to 3 IRE (0).
(5) Repeat step (3) above and measure pin 56 DC differential V_B3.
Pin 56 waveform
V_B, V_B3
Pin 2 waveform
P02 Black stretch amplifier maximum gain
B
A
A OPEN (1) Set SW2 to A (maximum gain) and input 500-kHz sine wave to TPA.
(2) Adjust signal amplitude to 0.1 V_p-p using pin 3.
(3) Set black stretch point 1 to off (000) and measure pin 56 amplitude V_A.
(4) Set black stretch point 1 to 001 (black stretch on) and measure pin 56 amplitude V_B.
(5) Calculate GBS using the following formula.
GBS = 20 × "og (V_B ÷ V_A) [dB]
54
2002-10-04