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TFS125D Filter specification
型号:   TFS125D
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描述:   Filter specification
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品牌   VECTRON [ Vectron International, Inc ]
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tfs125d.doc
version 2.0
21.02.2002
VI
TELEFILTER
Measurement Condition
Ambient Temperature:
Input Power Level:
Source impedance:
Load impedance:
Terminating impedances: *)
input:
output:
Filter specification
TFS 125 D
1/5
23
°C
0 dBm
50
single ended
50
single ended
175
|| -22.5 pF
200
|| -22.7 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of TFS 125D is the minimum of the pass band attenuation amin. This value 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
125,0 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 even 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
Insertion Loss
(Reference level)
Nominal Frequency
3 dB - Bandwidth
Pass Band Ripple
Relative Attenuation
1,8 MHz ...
f
N
±
6
MHz ...
f
N
±
MHz ...
f
N
- 124
39
MHz ...
f
N
+
Group delay
f
N
Group delay ripple
f
N
– 80 kHz ... f
N
+ 80 kHz
Input power level
Operating Temperature Range
Storage Temperature Range
arel
f
N
±
6
f
N
±
39
f
N
-
39
f
N
+ 775
MHz
MHz
MHz
MHz
a
e
= a
min
typ. Value
-
max.
Limit
8
dB
f
N
BW
-
125,0 MHz
min. 400
kHz
-
max.
1,0 dB
-
-
-
-
min.
min.
min.
min.
20
35
20
20
dB
dB
dB
dB
-
max.
1
µs
-
-
max.
1
µs
dBm
max. + 10
- 5 °C ... + 75 °C
- 40 °C ... + 85 °C
*)
The terminating impedances depend on parasitics and q-values of matching elements and the board used, and are to be understood as
reference values only. Should there be additional questions, do not hesitate to ask for an application note or contact our design team.
Generated:
Checked / approved:
______________________________________________________________________________________________________
VI TELEFILTER
Vectron International, Inc.
Potsdamer Straße 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:
vti@vtinh.com
E-Mail:
tft@telefilter.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.
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