ta7678 ETC-unknow, ta7678 Datasheet - Page 4

• Manufacturer Part Number: ta7678
• Description: Linear Integrated Circuit
• Manufacturer: ETC-unknow

CONTEK
TA7678
9.
10. V
11.
12. S1=ON, S3=2,S5=1,S4=2
13. Pin 14 open. VIF Input : 45.75MHz CW 20mVrms.
14. Pin 14 open. VIF Input: 45 .75MHz 100% APL 87.5% AM Modulation signal amplitude 50mVp-p
15. PIN14: Op en. SG1 :45.75MHz CW 100mvrms. SG2 :41.25MHz CW 25mVrms. Measre SIF(4.5MHz) output
16. SIF input: f=4.5MHz FM fMOD=400Hzm
17. SIF input: f=4.5MHz, FM fMOD=400Hz Df=+-25kHz. AM 30%,input level Vins=80dB m.
18. SIF input: f=4.5MHz, fM fMOD=400Hz Df=+-25kHz. Input level Vins=80dB m
19. SIF input: f=4.4~4.6MHz variable or sweep measure the outjput DC voltage change.
20. SIF inptut : f=4.5MHz, FM FMOD=400Hz
1. DC TEST CIRCUIT
VAGC=8V. SG1 :45.75MHz(P:picture) 100mVrms, SG2:41.25MHz(S: Sound) 32mVrms(-10dB of
SG1),SG3:42.17MHz(C:Chroma) 32mVrms(-10dB of SG1)
9.1. Setting VAGC so that the output Pin12 will be 3.0V DC.
9.2. Measure the level difference between the C-level and 920kHz.
level of Pin12 will be 2.5VDC measure DP and DG.
V
13.1. Adjust the voltate of Pin 3 so that the voltage of Pin4 will be 6.0V DC.
13.2. Measure the Pin 3.
detected output voltage (white peak to SYNC TIP)
voltage at Pin12.
16.1. Adjust SIF input level 100mVp-p and measure the detected output level Vos.
16.2. Then decrease the i nput level so that the detected output level will be 3dB down of Vos and measure the
20.1. Measure the detected output voltagae vOA with Rx= .
20.2. Then, adjust Rx so that the d etected output voltage will be VOA/2 and measure Rx.
AGC
AGC
=8V. VIF Input : f=45.75MHz video signal (RAMP) 87.5% AM 100mVp-p. Setting ATT so that the SYNC TIP
=5V. f=45.75MHz. Measure RIN and CIN.
input level.
Contek Microelectronics Co.,Ltd.
http://www.contek-ic.com E-mail:[e-mail]
LINEAR INTEGRATED CIRCUIT
Df=+-25kHz
Df=+-25kHz, input level Vins=80dB m.
mesure the
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