TA1270BFG Datasheet, PDF (25/39 Pages) Toshiba Semiconductor – PAL / NTSC VIDEO CHROMA AND SYNC PROCESSING SYSTEM FOR PIP / POP / PAP

Chroma block
NOTE
CHARACTERISTIC
C1 ACC Characteristics
C2
APC Frequency
Control Sensitivity
C3 SECAM ID Output DC Level
C4 NTSC Ident Sensitivity
TA1270BFG
TEST CONDITION
SUB ADDRESS & DATA
SW MODE
00
01
02
03
05 SW1 ―
―
TEST METHOD
(1) Input 3.58-NTSC signal 1 rainbow signal (Burst : chroma = 1 : 1) to the
chroma input (Pin 6).
80
80
80
80
80
B
―
―
(2) Measure the amplitude, F10, F30, F300, and F600, of the B-Y output (Pin
47) when the amplitude of the chroma input signal is set to 10, 30, 300,
and 600 mV_p-p.
(3) Calculate A = F30 / F300.
(1) Connect the chroma input pin (Pin 6) to GND via a capacitor.
80
80
80
81
80
B
―
― (2) Change the sub address (03) data to (81h), (83h), and (84h) and perform
or
or
the following for each.
83
81
or
(3) Connect external power source (V4) to the APC filter (Pin 4).
84
(4) Vary the voltage of external power source (V4) and measure the Fsc
output (Pin 44) using a frequency counter.
(5) Measure the free-run sensitivity β for the (V4 + 100 mV) near fsc.
(3.58NTSC ; β3, 4.43 ; PAL ; 4β ; M-PAL ; βM)
80
80
80
81
80
B
―
― (1) Connect the chroma input pin (Pin 6) to GND via a capacitor.
or
83
(2) Change the sub address (03) data to (81h), (83h), and (84h) and
or
measure the output DC level of the SECAM ID (Pin 46).
84
3.58 NTSC mode (81h) ; SEN
4.43 PAL mode (83h) ; SEP
SECAM mode (84h) ; SES
(1) Input 3.58-NTSC signal 1 rainbow signal (Burst : chroma = 1 : 1) to the
chroma input (Pin 6).
(2) While monitoring READ BUS “COLOR“, perform the following with BUS
80
80
80
80
80
A
―
―
“P / N-ID“ data = 1 and 0.
or
81
(3) Increase the amplitude of the input signal from 0 mV_p-p and measure the
amplitude at mode change to 3.58 NTSC mode.(Normal (1) ; vNCL, High
(0) ; vNCH)
(4) Decrease the amplitude of the input signal from 100 mV_p-p and measure
the amplitude at mode change to 3.58 NTSC mode.
(Normal (1) ; vNBL, High (0) ; vNBH)
25
2005-08-18