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參數資料
| 型號： | TFS249A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TELEFILTER Filter Specification |
| 中文描述： | TELEFILTER過濾器規格 |
| 文件頁數： | 1/5頁 |
| 文件大小： | 41K |
| 代理商： | TFS249A |
Tfs249A.doc
version 2.0
08.06.2001
VI
TELEFILTER
Filter Specification
TFS 249A 1/5
VI TELEFILTER
Potsdamer Strae 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-52 / Fax: (+49) 3328 4784-30
E-Mail:
tft@telefilter.com
Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
Tel: (603) 598-0070 Fax: (603) 598-0075
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 T
A
:
Input power level:
Terminating impedance at f
c
:
23 °C
0
dBm
input:
output:
1,15 k
|| -6,5 pF
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
a
. 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
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
f
N
-
249,6
MHz
Centre frequency
f
c
249,6
MHz
1 dB Bandwidth
3 dB Bandwidth
30 dB Bandwidth
40 dB Bandwidth
4,72
5,71
9,08
9,60
MHz
MHz
MHz
MHz
min.
3,84
-
-
11,0
MHz
max.
MHz
Passband ripple
within ± 1,92 MHz
-
min.
1,0
dB
Relative attenuation
f
N
...
f
N
± 3,08 MHz
f
N
± 5,5
MHz
f
N
± 15
MHz
arel
f
N
± 1,92
f
N
± 5,5
f
N
± 15
f
N
± 30
MHz
MHz
MHz
MHz
0,4
10
48
60
dB
dB
dB
dB
max.
min.
min.
min.
1,0
3,0
40,0
50,0
dB
dB
dB
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
Temperature coefficient of frequency ( Tc
f
)
*)
Frequency inversion temperature T
o
Storage temperature range
- 10 °C ... + 80 °C
0,032
32
ppm/ K2
°C
- 30
°
C ... + 85
°
C
*)
fc(Hz) = Tc
f
(ppm/K2) x (To - T
A
) 2 x fTo (MHz)
Generated:
Checked/Approved:
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