LA76835 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA76835

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

SANYO -> Panasonic 

LA76835NM

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", FM.MUTE = "0"

2. IFSW1 = "ON", pin 34 = 5V

3. Input signals are input to pin 69 and the carrier frequency is 4.5MHz.

Parameter

FM detection

output voltage

FM limiting

sensitivity

FM detection

output f characteristics

(fm = 100kHz)

FM detection output

distortion

AM rejection ratio

Symbol

SOADJ

SLS

SF

STHD

SAMR

SIF.S/N

SSN

de-emphtime constant

SNTC

Test point

75

75

75

75

75

75

75

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

Test method

Measure the FM detection output (400Hz com-

ponent) of pin 75.

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

component of the FM detection output at pin 75

becomes -3dB relative to SV1.

Set IFSW1 = "OFF".

Measure the FM detection output of pin 75.

···· [mVrms]

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

Measure the distortion factor of the 400Hz com-

ponent of the FM detection output at pin 75.

Measure the 400kHz component of the FM detec-

tion output at pin 75.

···· SV3 [mVrms]

Assign the measured value to SV3.

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

Measure the noise level (DIN AUDIO) at pin 75.

···· SV4 [mVrms]

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

Measure the 2.12kHz component of the FM

detection output at pin 75.

···· SV5 [mVrms]

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

Bus conditions

No.7962-13/50

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