参数资料
型号: TA1310ANG
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PDIP56
封装: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-56
文件页数: 46/106页
文件大小: 2686K
代理商: TA1310ANG
TA1310ANG
2005-09-20
44
(TEST CONDITIONS VCC = 9 V / 5 V, Ta = 25 ± 3°C)
SW MODE
NOTE
ITEM
SW54 SW55 SW56
MEASUREMENT METHOD
P20
VSM Peak Frequency
A
B
OPEN
1)
Set the bus control data to the preset value.
2)
Set SW54 to A, turn the Y mute off, and input a sweep signal to TP54.
3)
Set the #54 amplitude to 100 mVp-p.
4)
Observe TP1 (VSMOUT) with a spectrum analyzer and seek the peak point frequency FVSM.
P21
VSM Gain
A
B
OPEN
1)
Set the bus control data to the preset value.
2)
Set SW54 to A, turn the Y mute off (0), and input the FVSM sine wave (see P20 above) to TP54.
3)
Set the amplitude of #54 to 100 mVp-p.
4)
When the VSM gain is on (0), measure the TP1 (VSMOUT) amplitude VVSM0 (Vp-p).
5)
Next, measure the TP1 (VSMOUT) amplitude VVSM1 (Vp-p) when the VSM gain is off (1).
6)
Calculate GVSM0 and GVSM1 by the following formulas.
GVSM0 [dB] = 20 × og (VVSM0 ÷ 0.1)
GVSM1 [dB] = 20 × og (VVSM1 ÷ 0.1)
P22
VSM Muting Threshold
Voltage
A
B
OPEN
1)
Repeat steps 1) to 3) of P21.
2)
Connect the external power supply (PS) to #10 and increase the voltage from 0.5 V. Read the PS voltage VVM10
when the TP1 (VSMOUT) amplitude disappears, as shown in the following diagram.
3)
Set SW6 to open, connect #6 to an external power supply, increase the voltage from 1.5 V. When the TP1
(VSMOUT) amplitude disappears as shown in the following diagram, read the PS voltage VVM6.
Note 1: When testing, see the picture sharpness test circuit diagram. First turn ACB mode off (bus control).
Note 2: Ensure the composite signal is always input to pin 38 (SYNC IN).
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