TFS248C1 Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 248c1.doc
VI TELEFILTER
Version 1.4
Filter specification
TFS 248C1
24.08.2004
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
23
°C
0
dBm
63 Ω || -1,7 pF
63 Ω || -1,7 pF
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS248C1 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 nominal frequency fN is fixed to 248,6 MHz. 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
Insertion Loss
(reference level)
Nominal Frequency
Centre Frequency
ae = amin
fN
fC
typ. Value
3,0 dB
-
248,6 MHz
Tolerance / Limit
3,5 dB
248,6 MHz
-
3 dB Band width
6,6 MHz
5,0 MHz
Pass Band Ripple fN ± 120 kHz
Relative Attenuation
arel
0,1 dB
0,5 dB
fN – 248,5 MHz
fN + 10 MHz
fN + 21 MHz
... fN – 12 MHz
... fN + 21 MHz
... fN + 251,4 MHz
@ f_N + 22,8 MHz
@ f_N + 52,0 MHz
@ f_N + 74,8 MHz
@ f_N +104,0 MHz
@ f_N +126,8 MHz
57 dB
19 dB
67 dB
56 dB
56 dB
56 dB
56 dB
56 dB
min. 25 dB
min. 10 dB
min 25 dB
min. 50 dB
min. 50 dB
min. 50 dB
min. 50 dB
min. 50 dB
Group Delay GD
Group Delay Ripple fN ± 120 kHz
Input Power Level
150 ns
20 ns
-
max. 300
max. 100
max. 20
ns
ns
dBm
Operating Temperature Range
Storage Temperature Range
Temperature Coefficient
-
-
- 36 ppm/K
- 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.
**) ∆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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