Sharp 70GS-62SDE, Руководство по обслуживанию

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21
70GS-62S
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
supply voltage note 1 4.75 5.00 5.50 V
I
P
supply current 52 61 70 mA
V
i(VIF)(rms)
VIF input signal voltage sensitivity
(RMS value)
−
1 dB video at output
−
60 100
µ
V
G
VIF(cr)
VIF gain control range see Fig.10 60 66
−
dB
f
VIF
vision carrier operating frequencies see Table 28
−
33.4
−
MHz
−
33.9
−
MHz
−
38.0
−
MHz
−
38.9
−
MHz
−
45.75
−
MHz
−
58.75
−
MHz
∆
f
VIF
VIF frequency window of digital
acquisition help related to f
VIF
; see Fig.7
− ±
2.3
−
MHz
V
o(v)(p-p)
video output signal voltage
(peak-to-peak value) normal mode; see Fig.9 1.7 2.0 2.3 V
trap bypass mode;
see Fig.9 0.95 1.10 1.25 V
G
dif
differential gain
“CCIR 17”; note 2
B/G standard
− −
5 %
L standard
− −
7 %
ϕ
dif
differential phase “CCIR 17”
−
2 4 deg
B
v(
−
3dB)(trap)
−
3 dB video bandwidth including
sound carrier trap
C
L
< 20 pF; R
L
> 1 k
Ω
;
AC load; note 3
f
trap
= 4.5 MHz 3.95 4.05
−
MHz
f
trap
= 5.5 MHz 4.90 5.00
−
MHz
f
trap
= 6.0 MHz 5.40 5.50
−
MHz
f
trap
= 6.5 MHz 5.50 5.95
−
MHz
α
SC1
trap attenuation at first sound carrier M/N standard 30 36
−
dB
B/G standard 30 36
−
dB
S/N
W
weighted signal-to-noise ratio of
video signal see Fig.5; note 4 56 59
−
dB
PSRR
17
power supply ripple rejection at
pin 17 f
ripple
= 70 Hz; video signal;
grey level; positive and
negative modulation;
see Fig.8
20 25
−
dB
B
v(
−
1dB)
−
1 dB video bandwidth C
L
< 20 pF; R
L
> 1 k
Ω
;
AC load; trap bypass mode
5 6
−
MHz
AFC
stps
AFC steepness
∆
I
21
/
∆
f 0.85 1.05 1.25
µ
A/kHz
V
o(AF)(rms)
audio output signal voltage at pin 8
(RMS value) 27 kHz FM deviation;
50
µ
s de-emphasis
430 540 650 mV
THD
audio
total harmonic distortion of audio
signal 27 kHz FM deviation;
50
µ
s de-emphasis
−
0.15 0.50 %
AM; m = 54%
−
0.5 1.0 %
ICs ADITIONAL INFORMATION: TDA9885 (IC201)