参数资料
型号: TA1276AF
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封装: 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件页数: 41/83页
文件大小: 1585K
代理商: TA1276AF
TA1276AF
2002-01-29
46
Test Conditions (unless otherwise stated, VCC1 = 5 V, VCC2/VCC3/DEF VCC = 9 V, Ta = 25 ± 3°C)
Switching Mode
Note
Parameter
SW15
SW49
SW50
SW53
Test Conditions
V15
VSM Gain
C
ON
B
A
1)
Set the BUS control data to the preset value.
2)
Input the frequency FVL sine wave to TP78.
3)
Turn the Y mute off (1), turn the video mute off (0), set the aperture compensator peak frequency to 4.2M (001), and
set the amplitude of pin 78 to 0.1 Vp-p.
4)
Measure the TP5 amplitudes VL00, VL01, VL10, and VL11 in the following cases.
VSM gain
0dB (00)
→ VL (H) 00
6dB (01) → VL (H) 01
9dB (10) → VL (H) 10
OFF (11)
→ VL (H) 11
5)
Input the sine wave of frequency FVH to TP78, set the aperture compensator peak frequency to 7.7M (111), and
measure the TP5 amplitudes VH00, VH01, VH10, and VH11 as above.
6)
Calculate the following formulas.
GVL (H) 00 = 20 × Log (VL (H) 00/0.1) [dB]
GVL (H) 01 = 20 × Log (VL (H) 01/0.1) [dB] 20 × Log (VL (H) 00/0.1) [dB]
GVL (H) 10 = 20 × Log (VL (H) 10/0.1) [dB] 20 × Log (VL (H) 00/0.1) [dB]
GVL (H) 11 = 20 × Log (VL (H) 00/0.1) [dB]
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