
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
s
T16
4.40625MHz
214.5mVpp
4.25MHz
166.7mVpp