No. 5473-5/8

LA7437, 7437A

LA7437A Control Pin Table

Note: Do not allow pin 3 to fall under 1.5 V. (The chip will enter test mode.)

Function Control in each of the LA7437A Operating Modes

Note: 1. K1 is the YNR coefficient, K2 is the LNC coefficient

3. The detail enhancer is off when pin 18 is at the middle level.

Pin No.

Control function

L

M

H

9

R/P

Edit

3.8 VDC or more

40

R/P

YNR (AVNS)-CTL

1.0 VDC to less

1.5 to 2.5 VDC

3.5 VDC or more

YNR-off

YNR-CTL

YNR (strong)

R

******

3.9 VDC or more

11

P

N, C, CTL

1.5 VDC or less

2.0 to 3.0 VDC

N, C-off

N, C-CTL

17

R/P

C-rotary

0 to 1.9 VDC

2.3 VDC or more

Low CH

High CH

19

P

QV/QH CHARA. INS

0.8 VDC or less

1.2 to 2.2 VDC

2.6 to 3.3 VDC

3.7 VDC or more

Through

CHARA insert

Pedestal insert

QV insert

25

R/P

EP/LP/SP

1.2 VDC or less

2.0 to 2.7 VDC

3.9 VDC or more

SP

LP

EP

28

R

SP carrier shift stop

3.0 VDC or more

SP carrier shift stop

27

P

NAP

1.2 VDC or less

2.0 to 2.7 VDC

3.3 VDC or more

Through

Balanced-mod output

NAP-on

30

R/P

NT/MESEC/PAL

1.2 VDC or less

2.0 to 2.7 VDC

3.9 VDC or more

PAL

MESEC

NTSC

33

P

Trick

3.9 VDC or more

2

P

DOC-off

4.1 VDC or more

6

R/P

PB-H

4.0 VDC or more

YNR

Detail enhancer

NC

Edit

Pin 40 control

Pin 11 control

Pin 11 control

PIC-CTL

carrier

shift

L

M

H

L

M

H

L

M

H

On

Off

Off

Off

Off

Variable

Center

—

—

—

—

q

q

SP

(!)

Off

Off

Off

Off

Off

Variable

Center

—

—

—

—

q

q

REC

(!)

On

Off

K1 = 0.2 K1 = 0.2

Off

Variable

Center

—

—

—

—

q

q

LP

K2 = 0.0 K2 = 0.0

EP

Off

Off

K1 = 0.5 K1 = 0.5

Off

Variable

Center

—

—

—

—

q

q

K2 = 0.0 K2 = 0.0

On

K1 = 0.0 K1 = 0.0 K1 = 0.5

—

—

—

Off

Variable

Center

Center

—

SP

K2 = 0.0 K2 = 0.0 K2 = 0.0

Off

K1 = 0.0 K1 = 0.2 K1 = 0.5

—

—

—

Off

Variable

Center

q

q

—

PB

K2 = 0.0 K2 = 0.0 K2 = 0.0

On

K1 = 0.0 K1 = 0.2 K1 = 0.5

—

—

—

Off

Variable

Center

Center

—

LP

K2 = 0.5 K2 = 0.5 K2 = 0.5

EP

Off

K1 = 0.0 K1 = 0.2 K1 = 0.5

—

—

—

Off

Variable

Center

q

q

—

K2 = 0.5 K2 = 0.5 K2 = 0.5