LA75694M View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA75694M

For Use in TV/VTR Applications IF Signal Processing (VIF/SIF for Hi-Fi)

SANYO -> Panasonic 

LA75694M

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

(1) Apply DC voltage to the external AGC, IF AGC (pin 17) and adjust the voltage.

(2) fp = 45.75MHz 400Hz 40% AM 10mVrms (VIF input)

(3) Adjust the IF AGC (pin 17) 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 = 45.75MHz CW = 10mVrms (VIF input)

(3) Measure the noise voltage at test point A in RMS volts through a 10kHz to 4MHz band-pass filter.

····· Noise voltage (N)

Video portion (Vp-p)

1.12Vp-p

(4) S/N = 20log Noise voltage (Vrms) = 20log Noise voltage (Vrms) (dB)

V13. C/S beat [IC-S]

(1) Apply DC voltage to the external AGC IF AGC (pin 17) and adjust the voltage.

(2) fp = 45.75MHz CW; 10mVrms

fc = 42.17MHz CW; 10mVrms – 10dB

fs = 41.25MHz CW; 10mVrms – 10dB

(3) Adjust the IF AGC (pin 17) voltage so that the output level at test point A becomes 0.72Vp-p.

(4) Measure the difference between the levels for 3.58MHz and 0.92MHz components at test point A.

No.A0251-6/10

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