TFS249A Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – TELEFILTER Filter Specification

Tfs249A.doc
VI TELEFILTER
Measurement condition
Ambient temperature TA:
Input power level:
Terminating impedance at f_c:
input:
output:
version 2.0
Filter Specification
23 °C
0 dBm
1,15 kΩ || -6,5 pF
1,05 kΩ || -6,5 pF
08.06.2001
TFS 249A
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 249A is the minimum of the pass band attenuation amin . It is defined as the insertion
loss ae. The centre frequency fc 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 f_N is fixed on 249,6 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 fc 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 fc.
Data
typ. value
tolerance / limit
Insertion loss (Reference level) ae
Nominal frequency
f_N
14,0
dB
-
max. 20,0
249,6
dB
MHz
Centre frequency
f_c
1 dB Bandwidth
3 dB Bandwidth
30 dB Bandwidth
40 dB Bandwidth
249,6
4,72
5,71
9,08
9,60
MHz
MHz
MHz
MHz
MHz
min.
max.
3,84
-
-
11,0
MHz
MHz
Passband ripple
within ± 1,92 MHz
Relative attenuation
arel
f_N
...
f_N ± 1,92 MHz
f_N ± 3,08 MHz f_N ± 5,5 MHz
f_N ± 5,5 MHz f_N ± 15 MHz
f_N ± 15 MHz f_N ± 30 MHz
Group delay ripple within ± 1,92 MHz
Return loss:
within ± 1,92 MHz
Operating temperature range
Temperature coefficient of frequency ( Tcf ) *)
Frequency inversion temperature To
Storage temperature range
*) ∆fc(Hz) = Tcf(ppm/K²) x (To - TA) ² x fTo (MHz)
-
0,4
dB
10
dB
48
dB
60
dB
35
ns
16
dB
0,032 ppm/ K²
32
°C
min. 1,0 dB
max. 1,0 dB
min. 3,0 dB
min. 40,0 dB
min. 50,0 dB
max. 50,0 ns
min. 10,0 dB
- 10 °C ... + 80 °C
- 30 °C ... + 85 °C
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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