TFS457 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 457.doc
VI TELEFILTER
Version 1.3
Filter specification
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
165 Ω || -0,3 pF
165 Ω || -0,3 pF
TFS 457
03.05.2004
1/5
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
ae = amin
f_N
f_C
Relative attenuation
f-
N
f_N -
f_N +
f_N +
f_N +
80,0
35,0
25,0
57,5
127,5
MHz … f -
N
MHz … f_N -
MHz … f_N +
MHz … f_N +
MHz … f_N +
Intermodulation
arel
100,0
55,0
57,5
82,5
152,5
MHz
MHz
MHz
MHz
MHz
IP3 ***
Input power level
Permissible DC voltage
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
OTR
TCf ****
typ. value
2,7 dB
-
-
457,5
MHz
-
1,2 ** dB
62
dB
50
dB
24
dB
55
dB
68
dB
-
-
-
-
-
- 72
ppm/K
tolerance / limit
max.
3,0 dB
-
457,5 MHz
-
f ± 12 MHz
N
max.
3,0** dB
min.
50 dB
min.
30 dB
min.
20 dB
min.
40 dB
min.
57 dB
min.
20,0 dBm
max.
10 dBm
max.
12 V
- 25 °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.
**) 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-T₀) x fTo(MHz).
Generated:
Checked / Approved:
Tele Filter GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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