TFS248B Datasheet, PDF (1/4 Pages) Vectron International, Inc – SAW filter specification

tfs248b.eng
Version1.0, 01/98
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VI TELEFILTER
SAW filter specification
TFS 248 B
1/4
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Measurement condition
Ambient temperature:
Input power level:
Source impedance:
Load impedance:
Ext coil:
23 °C
0 dBm
490 Ω || -2.62 pF (± 10%)
490 Ω || -2.62 pF (± 10%)
82 nH
Construction
see page 2
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 248 B is the minimum of the pass band attenuation amin. The
minimum of the pass band attenuation amin is defined as the insertion loss ae.The nominal frequency fN is fixed on 248,450
MHz without tolerance.
Data
typ. value
tolerance / limit
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Insertion loss
ae = amin
2,5 dB
max 5
dB
(Reference level)
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Nominal frequency
fN
-
248,450 MHz
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Pass band ripple
fN - 85 kHz ... fN + 93 kHz
-
max 1,5 dB
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Relative attenuation
arel
248,45 MHz ±120 kHz
1,5 dB
max 3
dB
248,45 MHz ±330 kHz ... 248,45 MHz ±400 kHz
22
dB
min 18
dB
248,45 MHz ±400 kHz ... 248,45 MHz ± 600 kHz
33
dB
min 25
dB
248,45 MHz ±600 kHz ... 248,45 MHz ±800 MHz
50
dB
min 40
dB
248,45 MHz ±800 kHz ... 248,45 MHz ± 1,6 MHz
55
dB
min 45
dB
248,45 MHz ± 1,6 MHz ... 248,45 MHz ± 3,0 MHz
55
dB
min 45
dB
248,45 MHz ± 3,0 MHz ... 248,45 MHz ± 20 MHz
55
dB
min 46
dB
248,45 MHz ± 20 MHz ...248,45 MHz ±100 MHz
55
dB
min 45
dB
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Group delay distortion GDD
248,45 MHz ± 50 kHz
0,5 µs
max 1,2 µs
248,45 MHz ± 70 kHz
0,8 µs
max 1,5 µs
248,45 MHz ±100 kHz
1,2 µs
max 2,5 µs
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Operating temperature range
- 20 °C ... + 70 °C
Storage temperature range
- 30 °C ... + 85 °C
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Temperature coefficient of frequency TCf
- 0,036 ppm/K²
-
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Frequency inversion temperature
+ 25
°C
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generated:
checked/approved:
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VI TELEFILTER / Potsdamer Straße 18 / D 14 513 TELTOW
Phone: [phone] / Facsimile: ([phone] / e-mail: [e-mail]
Vectron Technologies Inc. / 267 Lowell Road / Hudson, NH 03051 U.S.A.
Phone: [phone] / Facsimile: ([phone] / e-mail: [e-mail]
tfs248b.eng
Version 1.0, 01/98