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

V14. Frequency characteristics [fc]

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

(2) SG1 : 45.75MHz continuous wave 10mVrms

SG2 : 45.65MHz to 39.75MHz continuous wave 2mVrms

Add the SG1 and SG2 signals using a T pat and adjust each SG signal level so that the above-mentioned levels

are reached and input the added signals to the VIF IN.

(3) First set the SG2 frequency to 45.65MHz, and then adjust the IF AGC voltage (V17) so that the output level at

test point A becomes 0.5Vp-p. ····· V1

(4) Set the SG2 frequency to 39.75MHz and measure the output level. ····· V2

(5) Calculate as follows :

fc = 20log V2 (dB)

V1

V15.V16. Differential gain, differential phase [DG, DP]

(1) Internal AGC

(2) fp = 45.75MHz APL50% 87.5% modulation video signal Vi = 10mVrms

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

V17. No-signal AFT voltage [V13]

(1) Internal AGC

(2) Measure the DC voltage at the AFT output (B).

V18.V19.V20. Maximum, minimum AFT output voltage, AFT detection sensitivity [V13H, V13L, Sf]

(1) Internal AGC

(2) fp = 45.75MHz ±1.5MHz Sweep = 10mVrms (VIF input)

(3) Maximum voltage : V13H, minimum voltage : V13L.

(4) Measure the frequency deviation at which the voltage at test point B changes from V1 to V2. ····· ∆f

V21.V22. VIF input resistance, Input capacitance [Ri, Ci]

(1) Referring to the Input Impedance Test Circuit, measure Ri and Ci with an impedance analyzer.

No.A0251-7/10

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