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參數(shù)資料
| 型號： | TFS249A |
| 廠商： | VECTRON INTERNATIONAL |
| 元件分類： | 聲表面波濾波器 |
| 英文描述： | 1 FUNCTIONS, 249.6 MHz, SAW FILTER |
| 文件頁數(shù)： | 1/5頁 |
| 文件大?。?/td> | 41K |
| 代理商： | TFS249A |
Tfs249A.doc
version 2.0
08.06.2001
VI TELEFILTER
Filter Specification
TFS 249A
1/5
VI TELEFILTER
Vectron International, Inc.
Potsdamer Strae 18
267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
Tel: (603) 598-0070 Fax: (603) 598-0075
E-Mail:
tft@telefilter.com
E-Mail:
vti@vtinh.com
VI TELEFILTER reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is
assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information
Measurement condition
Ambient temperature TA:
23 °C
Input power level:
0
dBm
Terminating impedance at fc:
input:
1,15 k
|| -6,5 pF
output:
1,05 k
|| -6,5 pF
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 fN 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
14,0
dB
max.
20,0
dB
Nominal frequency
fN
-
249,6
MHz
Centre frequency
fc
249,6
MHz
1 dB Bandwidth
4,72
MHz
min.
3,84
MHz
3 dB Bandwidth
5,71
MHz
-
30 dB Bandwidth
9,08
MHz
-
40 dB Bandwidth
9,60
MHz
max.
11,0
MHz
Passband ripple
within ± 1,92 MHz
-
min.
1,0
dB
Relative attenuation
arel
fN
...
fN ± 1,92 MHz
0,4
dB
max.
1,0
dB
fN ± 3,08 MHz
fN ± 5,5
MHz
10
dB
min.
3,0
dB
fN ± 5,5 MHz
fN ± 15
MHz
48
dB
min.
40,0
dB
fN ± 15
MHz
fN ± 30
MHz
60
dB
min.
50,0
dB
Group delay ripple within
± 1,92 MHz
35
ns
max.
50,0
ns
Return loss:
within
± 1,92 MHz
16
dB
min.
10,0
dB
Operating temperature range
- 10 °C ... + 80 °C
Temperature coefficient of frequency ( Tcf ) *)
0,032
ppm/ K
Frequency inversion temperature To
32
°C
Storage temperature range
- 30
°C ... + 85 °C
*)
fc(Hz) = Tcf(ppm/K) x (To - TA) x fTo (MHz)
Generated:
Checked/Approved:
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