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