TFS248D Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

Tfs248d.doc
VI TELEFILTER
Filter Specification
version 2.1
TFS 248 D
14.09.00
1/5
Measurement condition
Ambient temperature: 23 °C
Input power level:
0 dBm
Terminating impedance:
source:
630 Ω || -5,6 pF
load:
600 Ω || -5,7 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 248 D is the minimum of the pass band attenuation amin. This value is defined as the
insertion loss ae. The nominal frequency fN is fixed to 248,6 MHz. 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
Limit
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Insertion Loss (at ambient temperature)
ae = a0
4,0 dB
3,0 ... 6,0 dB
drift vs. Temperature
max. ± 0,5 dB
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Nominal Frequency
fN
-
248,6 MHz
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Centre Frequency
f0
248,6 MHz
-
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3 dB bandwidth
Bw3dB
min. 240 kHz
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Passband
fN ± 95 kHz
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Relative Attenuation
arel
fN ± 95 kHz
fN ± 95 kHz ... fN ± 120 kHz
max. 1,2 dB
-0,9 ... +2,1 dB
fN ± 330 kHz ... fN ± 600 kHz
min. 13 dB
fN ± 600 kHz ... fN ± 800 kHz
min. 22 dB
fN ± 800 kHz ... fN ± 3 MHz
min. 30 dB
fN ± 3 MHz ... fN ± 105 MHz
min. 48 dB
fN ± 105 MHz ... fN ± 150 MHz
min. 51 dB
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Group Delay
GD
max. 3 µs
Group Delay Ripple fN ± 95 kHz
-
max. 0,7 µs
fN ± 120 kHz
-
max. 1,0 µs
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Input power level
-
max. 12 dBm
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Operating Temperature Range
-5 °C ... + 75 °C
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Temperature Coefficient
TC
- 0,032 ppm/K2
-
______________________________________________________________________________________________________
generated:
checked / approved:
______________________________________________________________________________________________________
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
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