TFS378 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

tfs378.doc
version 2.1 17.03.2000
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VI TELEFILTER
Filter Specification
TFS 378
1/5
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Measurement condition
Ambient temperature: 23 °C
Input power level:
0 dBm
Terminating impedances
for input: 250 Ω // -2 pF
for output: 250 Ω // -2 pF
External coil:
90 nH
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 378 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 centre frequency fo is the arithmetic mean value of the upper and lower frequencies at the 3
dB filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 378 MHz without tolerance. The given values for the
relative attenuation arel and for the group delay ripple have to be reached at the frequencies given below also if the centre frequency fo is shifted
due to the temperature coefficient of frequency TCf in the operating temperature range and due to a production tolerance for the centre frequency fo.
Data
typ. Value
Tolerance / Limit
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Nominal Frequency
fN
-
378
MHz
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Insertion Loss
ae (reference level)
-
max. 5,5 dB
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3 dB Band Width
-
min. fN ± 80
kHz
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Pass Band Ripple
fN ± 67,5 kHz
-
max. 1,5 dB
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Relative Attenuation
arel
fN ± 400 kHz ... fN ± 600 kHz
fN ± 600 kHz ... fN ± 800 kHz
fN ± 800 kHz ... fN ± 1600 kHz
fN ± 1600 kHz ... fN ± 3000 kHz
fN ± 3000 kHz ... fN ± 20 MHz
fN ± 20 MHz ...fN ± 100 MHz
-
min. 18
dB
-
min. 32
dB
-
min. 38
dB
-
min. 42
dB
-
min. 50
dB
-
min. 50
dB
2 x fN
-
min. 50
dB
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Group Delay Deviation
GDD
fN ± 50 kHz
-
max. 1,2 µs
fN ± 70 kHz
-
max. 1,5 µs
fN ± 100 kHz
-
max. 2,5 µs
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Operating Temperature Range
- 10 °C ... + 70 °C
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Temperature Coefficient of Frequency TCf
Frequency Inversion Temperature
To
- 0,036 ppm/K²
-
30
°C
-
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Generated:
Checked / approved:
VI TELEFILTER
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: [phone] Fax: [phone]
E-Mail: [e-mail]
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