32Jw-73E - Sharp 32JW-73E Service Manual

32JW-73E

TDA9886 (IC201)
SYMBOL
−3 dB AF bandwidth
B
AF(−3dB)
S/N weighted signal-to-noise ratio of
W(AF)
audio signal
α
AM suppression of
AM(sup)
FM demodulator
PSRR power supply ripple rejection on
AUD
pin AUD
V IF intercarrier output level
o(intc)(rms)
(RMS value)
Reference frequency
f reference signal frequency
ref
V reference signal voltage
ref(rms)
(RMS value)
Notes
1. Values of video and sound parameters can be decreased at V
2. For applications without I
3. Condition: luminance range (5 steps) from 0% to 100%.
4. AC load: C < 20 pF and R
L
by the integrated sound carrier traps (see Figs 13 to 18; H (s) is the absolute value of transfer function).
5. S/N is the ratio of the black-to-white amplitude to the black level noise voltage (RMS value measured on
W(video)
pin CVBS). B = 5 MHz weighted in accordance with "CCIR 567" .
6. Conditions: video signal, grey level, positive and negative modulation.
7. The intercarrier output signal at pin SIOMAD can be calculated by the following formula taking into account the
internal video signal with 1.1 V (p-p) as a reference:
V 1.1 V (p-p)
=
o(intc)
V
( )
i SC
( )
--------------- dB is the sound-to-picture carrier ratio at pins VIF1 and VIF2 in dB, 6 dB is the correction term of internal
V
( )
i PC
circuitry and ±3 dB is the tolerance of video output and intercarrier output V
8. Pin REF is able to operate as a 1-pin crystal oscillator input as well as an external reference signal input, e.g. from
the tuning system.
PARAMETER
C-bus, the time constant (R × C) at the supply must be >1.2 µs (e.g. 1 Ω and 2.2 µF).
2
> 1 kΩ. The sound carrier frequencies (depending on the TV standard) are attenuated
L
V
( )
i SC
( ) ±
--------------- dB + 6 dB 3 dB
V
( )
i PC
--------------------------------------------------------------- -
1
20
× ×
10
---------- -
2 2
CONDITIONS
without de-emphasis;
dependent on FM-PLL filter
FM: 27 kHz FM deviation;
50 µs de-emphasis;
vision carrier unmodulated
AM: m = 54%
50 µs de-emphasis;
AM: f = 1 kHz and m = 54%;
referenced to 27 kHz
FM deviation
f = 70 Hz; see Fig.6
ripple
for AM
for FM
QSS mode; SC ; SC off
1 2
L standard;
without modulation
intercarrier mode;
SC ; SC off; note 7
1 2
note 8
operation as input terminal
= 4.5 V.
P
1
(RMS), where: is the correction term for RMS value,
---------- -
2 2
o(intc)(rms)
22
MIN. TYP. MAX. UNIT
−
80 100 kHz
−
52 56 dB
−
45 50 dB
−
40 46 dB
−
20 26 dB
−
14 20 dB
90 140 180 mV
90 140 180 mV
− − −
mV
− −
4 MHz
−
80 400 mV
.