參數(shù)資料
型號: TDA9808T-T
廠商: NXP SEMICONDUCTORS
元件分類: 接收器
英文描述: AM/FM, AUDIO/VIDEO DEMODULATOR, PDSO20
文件頁數(shù): 29/35頁
文件大?。?/td> 170K
代理商: TDA9808T-T
TA1317AN
2002-09-06
36
Test Condition
SW Mode
Note
No.
Parameter
SW5
SW6
SW7
SW8
SW10
SW11
SW17
SW24
Test Method
(unless otherwise specified, VCC = 9 V, Ta = 25 ± 3°C, data = preset values)
17
Parabola amplitude
adjustment (EW parabola)
change amount
OFF
B
ON
OFF
B
ON
A
(1) Input vertical trigger pulse to pin VIN.
Pulse level (VT)
= 3.0 V
(2) Set PICTURE WIDTH (sub-address: 01) to maximum (data: FC).
(3) Apply external power supply (DC voltage
= 7 V) to pin 3 (EHT IN).
(4) Set EW PARABOLA (sub-address: 0A) to minimum (data: 00) and measure Pin 10
(EW FD) amplitude VPB (00).
(5) Set EW PARABOLA (sub-address: 0A) to center (data: 20) and measure Pin 10
(EW FD) amplitude VPB (20).
(6) Set EW PARABOLA (sub-address: 0A) to maximum (data: 3F) and measure Pin 10
(EW FD) amplitude VPB (3F).
(7) Calculate change amount VPB using the following formula.
VPB = VPB (3F) VPB (00)
Pin 10 (EW FD) waveform
V
PB
(00)
V
PB
(3F
)
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