LA75501 查看數據表（PDF） - SANYO -> Panasonic

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LA75501

Monolithic Linear IC For Use in TV/VCR Applications VIF/SIF Signal Processing IC

SANYO -> Panasonic 

LA75501

V10.V11. Black noise threshold and clamp voltage [VBTH, VBCL]

(1) Apply DC voltage (1 to 3V) to the external AGC, IF AGC (pin 15) and adjust the voltage.

(2) fp = 38.0MHz 400Hz 40% AM 10mVrms (VIF input)

(3) Adjust the IF AGC (pin 15) voltage to operate the noise canceller.

Measure the VBTH, VBCL at test point A.

V12. Video S/N [S/N]

(1) Internal AGC

(2) fp = 38.0MHz CW = 10mVrms (VIF input)

(3) Measure the noise voltage at test point A in RMS volts through a HPF: 100kHz, LPF: 5MHz filter.

····· Noise voltage (N)

(4) S/N = 20log Video voltage (Vp-p) = 20log 1.3Vp-p (dB)

N (Vrms)

N(Vrms)

V13. C/S beat [Ics]

(1) Internal AGC.

(2) fp = 38.0MHz APL50% 87.5% Modulation video signal.

(3) Measure the difference between the levels for 4.43MHz and 1.07MHz components at test point A.

V14.V15. Differential gain, differential phase [DG, DP]

(1) Internal AGC

(2) fp = 38.0MHz APL50% 87.5% Modulation video signal Vi = 10mVrms

(3) Measure the DG and DP at test point A.

No.A0789-8/11

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