ta1383afg TOSHIBA Semiconductor CORPORATION, ta1383afg Datasheet - Page 29

• Manufacturer Part Number: ta1383afg
• Description: Ntsc Chroma Decoder, Multi-point Scan Sync Processor, H/v Frequency Counter Ic For Color Tv
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Chroma block
Note No.
CH1
CH2
CH3
ACC characteristic
Identification sensitivity
APC frequency control sensitivity
Characteristic
SW2
C
SW Mode
B
B
SW30
C
C
C
Chroma block common test conditions
(1)
(2)
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(1)
(2)
(3)
Write data: Transmit PREST DATA. Read data: Read DATA.
Set SW2 to B, SW4 to C, SW6 to B, SW9 to On, SW12 to A, SW16 to A, SW19 to A, SW22 to B, SW23 to B, and SW24 to B,
SW28 to C, SW29 to C, and SW30 to C. Input sync signal (15.734 kHz) to TP2.
Input rainbow signal to the C1 IN pin (burst: chroma = 1:1).
Adjust burst phase so that the lower extremity of the TP23A (Cb/Pb OUT) output waveform is at the second bar; the upper
extremity, at the 7
Change the chroma input signal amplitudes to 10, 30, 300, and 600 mV
amplitudes F11, F31, F301, and F601.
Determine A2 = F31/F601 according to the measurement result in (3) above.
Input rainbow signal to the C1 IN pin (burst: chroma = 1:1).
Monitor TP26 (CW OUT) DC voltage.
Increase input signal amplitude from 0. When TP26 (CW OUT) DC voltage reaches High (3.2 V), measure input signal
amplitude VCI.
Decrease input signal amplitude from 100 mV
amplitude VBI.
Connect #20 (APC FILTER) to external power supply (V20).
Change external power supply (V20) voltage. When #26 (CW OUT) output frequency matches 3.579545 MHz, voltage is
referred to as Vf.
Measure #26 (CW OUT) output frequency Xf (+100) and Xf (−100) in relation to Vf ± ∆Vf (±100 mV
sensitivity βf using the following equation.
βf = (Xf (+100) − Xf (−100))/200 [Hz/mV]
TA23A (Cb/Pb OUT) output signal waveform
th
bar.
29
1
2
3
4 5
6
7
p-p
8
. When TP26 (CW OUT) DC voltage drops Low (1.4 V), measure input signal
9
10
Test Method
TA23A output signal waveform
p-p
F30, F300,
F600
and measure the TP23A (Cb/Pb OUT) output
F10
C1 IN signal amplitude [mV
10
30
300
p-p
). Determine free-running
600
TA1383AFG
p-p
2005-09-05
]