3 May 08, 2001
SAW Components G 1965 M
38,90 MHzIF Filter for Intercarrier Applications
Data Sheet
Characteristics
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 13,6 15,1 16,6 dB
following data
Relative attenuation α
rel
Picture carrier 38,90 MHz 5,0 6,0 7,0 dB
33,90 MHz — 6,2 — dB
Color carrier 34,47 MHz 0,0 1,0 2,0 dB
Sound carrier 33,40 MHz 18,9 20,4 21,9 dB
Adjacent picture carrier UHF 30,90 MHz 45,0 57,0 — dB
Adjacent picture carrier VHF 31,90 MHz 48,0 55,0 — dB
31,40 MHz 46,0 61,0 — dB
32,40 MHz 48,0 55,0 — dB
40,15 MHz 38,0 48,0 — dB
Adjacent sound carrier VHF 40,40 MHz 44,0 55,0 — dB
Adjacent sound carrier UHF 41,40 MHz 42,0 53,0 — dB
Lower sidelobe 25,00 ... 31,90 MHz 40,0 47,0 — dB
Upper sidelobe 40,40 ... 45,00 MHz 38,0 48,0 — dB
Reflected wave signal suppression
1,1 µs ... 6,0 µs after main pulse 42,0 53,0 — dB
(test pulse 250 ns,
carrier frequency 37,40 MHz)
Feedthrough signal suppression
1,3 µs ... 1,1 µs before main pulse 50,0 56,0 — dB
(test pulse 250 ns,
carrier frequency 37,40 MHz)
Group delay ripple (p-p) ∆τ —50 —ns
Impedance at 37,40 MHz
Input:
Z
IN
=
R
IN
||
C
IN
— 1,9 ||13,8 — kΩ || pF
Output:
Z
OUT
=
R
OUT
||
C
OUT
—
1,5 || 4,8
—kΩ || pF
Temperature coefficient of frequency
TC
f
— –72 — ppm/K
