LA70100M

No.7204-4/16

Continued from preceding page.

Ratings

Parameter

Symbol

In

Out

Conditions

min

typ

max

Unit

SECAM detection

characteristics-1

VSCMP1

V25

V26

T28

( see notes-15 )

4.5

V

SECAM detection

characteristics-2

VSCMP2

V25

V26

T28

( see notes-15 )

0.5

V

R/P control threshold voltage

VTRP

T17

Minimum voltage of T16 under normal PB

condition

2.3

2.5

2.7

V

Clock input level

VCLK

T2

T9

T2 = Sign Wave (4.433619MHz), SW9 = ON

Minimum voltage of T9 at phase locked T2

with T8.

100

200

800

mVp-p

Sync signal input threshold level

VTHS

T29

T28

Minimum voltage of T29 at BGP outputs

normally from T28. T9 = 5V

1.8

2.0

2.2

Vp-p

SECAM DET comparator

threshold voltage

VTCOMP

T27

T28

Minimum applied voltage of T27 at T28 = H.

3.2

3.5

3.8

V

Supplemental Description

(Note 1) REC mode BELL center frequency (FBLR1, FBLR2, FBLR3) :

Input a sine wave (200mVpp, 4 to 5MHz) to T16 and measure the amplitude at T20. Assign to FBLR1 (T10=OPEN),

FBLR2 (T10=0V), FBLR3 (T10=5V) the frequency at T16 where the amplitude is maximized.

(Note 3) REC EQ (1.1MHz A-BELL) center frequency (FEQR) :

Observe the waveform at T11 when T12=sine wave (200mVpp, 4 to 5MHz, BIAS=4V) is input and assign to FEQR

the frequency at T11 where the amplitude is minimized.

(Note 4) Assign to V15R the voltage of T15 at the time of VAGC measurement.

(Note 5) PB EQ (1.1MHz BELL) center frequency (FEQP) :

Input a sine wave (50mVpp, 1 to 1.2MHz) to T14 and assign to FEQP the frequency at T14 where the signal level of

T11 is maximized.

(Note 6) PB 4.3MHz A-BELL center frequency (1 FBLP1) / (2 FBLP2) / (3 FBLP3) :

Input a sine wave (200mVpp, 1 to 1.2MHz, BIAS=4V)) to T18 and assign to FBQP1 (T10=OPEN), FBQP2

(T10=0V), FBEQP3 (T10=5V) the frequency at T18 where the signal level at T20 is minimized.

SECAM standard color bar signal (75%)

Fig.1

DR

DB

T29

1.5

µs

T16

4.40625MHz

214.5mVpp

4.25MHz

166.7mVpp