FILTERS
Description
FILTERS FOR FM APPLICATIONS–HIGHLY SELECTIVE G.
D.
T.
FLAT TYPE SFE MX/MA8/ML 10.
7MHz
The SFE 10.
7MX/MA8/ML lines of ceramic filters were designed to minimize the dispersion of amplitude and phase characteristics within the pass band.
Because the excellent G.
D.
T.
characteristics of these filters insure signal integrity, they are recommended for use in applications ranging from high grade stereo receivers to digital transmission systems.
FEATURES
s Little dispersion of amplitude characteristics and phase characteristics (G.
D.
T.
characteristics)
s The SFE 10.
7 MX Series has G.
D.
T.
characteristics and is useful for obtaining
low distortion.
SFE 10.
7 ML Series, in these ceramic filters, being in harmony with flatness of G.
D.
T.
, roundness of the amplitude and selectivity characteristics, therefore, these ceramic filters are suitable to high-grade stereo tuners.
Even if mismatching condition, they can keep little distortion because of low Qm of ceramic material.
The SFE 10.
7 MA8 Series is based on SFE 10.
7 MA5/MS2/MS3, and it obtains high selectivity with low loss.
There is little dispersion of amplitude and G.
D.
T.
characteristics, and low distortion rate can be obtained.
s All products are inspected for symmetry and roundness of amplitude
DIMENSIONS MX SERIES
Low Distortion
9.
0 max.
MA8 SERIES High Selectivity, Low Loss
7.
0 ± 2
ML SERIES Selectivity
7.
0 ± 2
TEST CIRCUIT
R1 ቤ ባ ቢ
E10.
7X
M
11.
0 max.
5.
0 ± 1
2.
5 2.
5 ቤባቢ 3±1
: EIA-J Date Code
E10.
7A
M
7.
0 ± 2
5.
0 ± 1
2.
5 2.
5 ቤባቢ 3±1
: EIA-J Date Code
E10.
7L
M
7.
0 ± 2
5.
0 ± 1
2.
5 ቤባቢ
2.
5 3±1
: EIA-J Date Code
Rg=50⍀ S.
S.
G.
C R2
RF Voltmeter
R1 + Rg = R2 = 330⍀ C = 10pF (including stray capacitance and input capacitance of RF Voltmeter)
ቢ INPUT ባ GROUND ቤ OUTPUT
SPECIFICATIONS
SFE MX/MA8/ML SERIES
Part Number
3dB Bandwidth 20dB Bandwidth Insertion Loss Spurious (9~12MHz) Ripple w/n 3dB
(kHz)
(kHz) max.
(dB) max.
(dB) min.
Bandwidth (dB)
G.
D.
T.
Bandwidth (kHz) min.
SFE10.
7MX-A
250 ± 40
670 (62...
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