TFS248L Datasheet, PDF (1/5 Pages) Vectron International, Inc – Vectron International Filter specification

Filename: tfs 248l.doc
VI TELEFILTER
Version 1.2
Filter specification
TFS 248L
03.07.2007
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedance: *
Input:
Output:
25
°C
0
dBm
647 Ω || -6.7 pF
612 Ω || -6.6 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 248L is the minimum of the pass band attenuation. This value is defined as the insertion loss
ae. The nominal frequency fN is fixed at 248,6 MHz without any tolerance. The values of relative attenuation arel are guaranteed for the whole operating
temperature range. The frequency shift of the filter in the operating temperature range is included in the production tolerance scheme.
Data
Insertion loss
ae
(reference level)
Nominal frequency
f_N
Passband
PB
Pass band ripple
p-p
Relative attenuation
arel
f_N
… f_N ± 280
kHz
f_N ± 280
kHz … f_N ± 352
kHz
10,0 MHz … f_N - 29,2 MHz
f_N - 29,2 MHz … f_N -
1,6 MHz
f_N ± 0,60 MHz … f_N ±
0,8 MHz
f_N - 0,8 MHz … f_N -
1,6 MHz
f_N + 0,8 MHz … f_N +
1,6 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
f_N + 1,6 MHz … f_N + 100
MHz
Group delay ripple within f_N ± 162,5 kHz
Group delay ripple within f_N ± 162,5 kHz … f_N ± 270 kHz
Group delay ripple within f_N ± 270 kHz … f_N ± 352 kHz
Return loss within PB
Input power level
Operating temperature range
Storage temperature range
Temperature coefficient of frequency
OTR
TCf ***
typ. value
6,3 dB
-
0,10 dB
1,0 dB
4,1 dB
74
dB
52
dB
30
dB
52
dB
44
dB
64
dB
68
dB
70
dB
62
dB
68
dB
51
dB
143
ns
376
ns
796
ns
13
dB
-
-
-
-0,036 ppm/K²
tolerance / limit
max.
8,0 dB
248,6
f_N ±
max.
280
3,0
MHz
kHz
dB
max.
max.
min.
min.
min.
min.
min.
min.
min.
min.
min.
min.
min.
3,0 dB
5,0 dB
55 dB
48 dB
27 dB
45 dB
42 dB
55 dB
55 dB
55 dB
55 dB
55 dB
48 dB
max.
370
ns
max.
650
ns
max.
925
ns
min.
10 dB
max.
10 ** dBm
- 20 °C ... + 80 °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.
**) max. 20 dBm input power level for ≤100 hours
***) ∆f(Hz) = TCf(ppm/K²) x (T-T₀)² 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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