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TFS457 Filter specification
型号:   TFS457
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描述:   Filter specification
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品牌   VECTRON [ Vectron International, Inc ]
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Filename: tfs 457.doc
Version 1.3
03.05.2004
VI
TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
0
°C
dBm
Filter specification
TFS 457
1/5
165
|| -0,3 pF
165
|| -0,3 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 457 is the minimum of the pass band attenuation amin. The minimum of the pass band
attenuation amin is defined as the insertion loss ae. The centre frequency f
C
is the arithmetic mean value of the upper and lower frequencies at the 2dB
filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed on 457,5 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 f
C
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 f
C
.
Data
Insertion loss
(reference level)
Nominal frequency
Centre frequency
Passband
Pass band ripple
Relative attenuation
f
N
-
80,0
35,0
f
N
-
25,0
f
N
+
57,5
f
N
+
127,5
f
N
+
Intermodulation
Input power level
Permissible DC voltage
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
TCf ****
OTR
MHz
MHz
MHz
MHz
MHz
f
N
f
N
f
N
f
N
f
N
-
-
+
+
+
100,0
55,0
57,5
82,5
152,5
arel
MHz
MHz
MHz
MHz
MHz
IP3
***
ae = amin
typ. value
2,7
-
-
457,5
-
1,2 **
dB
MHz
dB
tolerance / limit
max.
3,0
-
457,5
-
f
N
± 12
max.
MHz
dB
MHz
f
N
f
C
3,0** dB
62
50
24
55
68
-
-
-
-
-
- 72
dB
dB
dB
dB
dB
min.
min.
min.
min.
min.
min.
max.
max.
50
30
20
40
57
20,0
10
12
dB
dB
dB
dB
dB
dBm
dBm
V
- 25 °C ... + 75°C
- 40 °C ... + 85°C
ppm/K
*) 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.
**) 1,5 dB over
f
N
±
10 MHz at ambiente temperature (23 °C).
***) modulation signals:
f
N
+ 1 MHz and f
N
+ 2 MHz, each of 10 dBm
****)
∆f(Hz)
= TCf(ppm/K) x (T-T
0
) x fTo(MHz).
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: (+49) 3328 4784-0 / Fax: (+49) 3328 4784-30
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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