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SAW Components
IF Filter for Quasi/Split Sound Applications
Data Sheet
Characteristics of picture channel
J 3353 K
38,90 MHz
Reference temperature:
Terminating source impedance:
Terminating load impedance:
T A = 25 ?C
Z S = 50 ?
Z L = 2 k ? || 3 pF
Insertion attenuation
α
min.
typ.
max.
Reference level for the
37,40 MHz
12,9
14,4
15,9
dB
following data
Relative attenuation
α rel
Picture carrier
Color carrier
Sound carrier
Adjacent picture carrier
Adjacent sound carrier
Lower sidelobe
Upper sidelobe
38,90
34,47
32,90
32,35
30,90
30,40
31,40
40,90
40,35
25,00 ... 30,90
40,90 ... 45,00
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
MHz
5,0
–0,6
40,0
44,0
50,0
48,0
48,0
45,0
43,0
46,0
39,0
6,0
0,4
52,0
56,0
62,0
60,0
60,0
55,0
53,0
54,0
45,0
7,0
1,4
—
—
—
—
—
—
—
—
—
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Reflected wave signal suppression
1,2 μ s ... 6,0 μ s after main pulse
42,0
55,0
—
dB
(test pulse 250 ns,
carrier frequency 37,40 MHz)
Feedthrough signal suppression
1,2 μ s ... 1,1 μ s before main pulse
50,0
56,0
—
dB
(test pulse 250 ns,
carrier frequency 37,40 MHz)
Group delay predistortion
(reference frequency 38,90 MHz)
?τ
38,90 MHz
34,47 MHz
—
—
0
–50
—
—
ns
ns
Impedance at 37,40 MHz
Input:
Z IN
= R IN
|| C IN
—
1,2 || 24,0
—
k ? || pF
Output: Z OUT = R OUT || C OUT
—
2,5 || 3,6
—
k ? || pF
Temperature coefficient of frequency
TC f
—
–72
—
ppm/K
3
Mar 31, 2006
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