LA76814 Ver la hoja de datos (PDF) - SANYO -> Panasonic

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LA76814

For NTSC Color Television Sets VIF/SIF/Y/C/Deflection Implemented in a Single Chip

SANYO -> Panasonic 

LA76814

SIF Block (FM block) Input Signals and Test Conditions

Unless otherwise specified, the following conditions apply when each measurement is made.

1. Bus control condition: IF.AGC. = "1"

2. IFSW1 = "ON"

3. Input signals are input to pin 54 and the carrier frequency is 4.5MHz.

Parameter

FM detection

output voltage

Symbol

SOADJ

FM limiting

sensitivity

FM detection

output f characteristics

(fm = 100kHz)

FM detection output

distortion

AM rejection ratio

SLS

SF

STHD

SAMR

SIF.S/N

NT de-emph time

constant

BPF band

characteristics

SSN

SNTC

SBW

Test point

2

2

2

2

2

2

2

2

Input signal

90dBµ,

fm = 400Hz,

FM = ±25kHz

fm = 400Hz,

FM = ±25kHz

90dBµ,

fm = 100kHz

FM = ±25kHz

90dBµ,

fm = 400Hz,

FM = ±25kHz

90dBµ,

fm = 400Hz,

AM = 30%

90dBµ,

CW

90dBµ,

fm = 2.12kHz

FM = ±25kHz

90dBµ,

CW

Test method

Adjust the DAC (FM.LEVEL) to 7 and measure the

400Hz component of the FM detection output at

pin 2.

···· SV1[mVrms]

Measure the input level (dBµ) at which the 400Hz

component of the FM detection output at pin 2

becomes -3dB relative to SV1.

Set IFSW1 = "OFF".

Measure the FM detection output of pin 2.

···· SV2[mVrms]

SF = 20Log (SV1/SV2) [dB]

Measure the distortion factor of the 400Hz

component of the FM detection output at pin 2.

Measure the 400Hz component of the FM

detection output at pin 2.

Assign the measured value to SV3.

···· SV3[mVrms]

SAMR = 20Log (SV1/SV2) [dB]

Measure the noise level (DIN AUDIO)

at pin 2.

···· SV4[mVrms]

SSN = 20Log (SV1/SV4) [dB]

Measure the 2.12kHz component of the FM

detection output at pin 2.

···· SV5[mVrms]

SNTC = 20Log (SV1/SV5) [dB]

Set SW: IF1 = "OFF".

PIN 9 = 5V

Measure the 646kHz component at pin 2.

···· SV6[mVrms]

Set the input frequency to 4.65MHz to the input

frequency and measure the 496kHz component at

pin 2.

···· SV7[mVrms]

SBW = 20Log (SV6/SV7) [dB]

Bus conditions

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

FM.LEVEL = 7

No.A0253-10/35

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