TFS248E Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Tfs248e.doc
VI TELEFILTER
version 6.0
Filter specification
08.04.2002
TFS 248 E
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances at fc *)
Characteristics
23
0
Input:
Output:
°C
dBm
560 Ω || -5.9pF
500 Ω || -6.3 pF
Remark:
The reference level for the relative attenuation arel of TFS 248E is the minimum of the pass band attenuation amin. This value is defined as the
insertion loss ae. The nominal frequency fN is fixed at 248,6 MHz without any tolerance. The given values for the relative attenuation arel and the
group delay ripple have to be reached at the frequencies given below, even 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 (at ambient temperature)
ae = a0
typ. Value
Limit
max. 6,0 dB ***)
Nominal Frequency
fN
-
248,6 MHz
Centre Frequency
fc
248,6 MHz
-
Passband Ripple (p-p) f_N ± 100 kHz
0,6 dB
max. 1,0 dB
Relative Attenuation ****)
arel
f_N ± 330 kHz ... f_N ± 600 kHz
f_N ± 600 kHz ... f_N ± 0,8 MHz
f_N ± 0,8 MHz ... f_N ± 1,6 MHz
f_N ± 1,6 MHz ... f_N ± 2,2 MHz
f_N -
2,2 MHz ... f_N -29,2
MHz
f_N - 29,2 MHz ... f_N -238,6 MHz
f_N + 2,2 MHz ... f_N +100
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
Group Delay Ripple (p-p) f_N ± 100 kHz
Input power level
<=100 hours
<=15 years
Operating Temperature Range
Temperature Coefficient **)
TC
Frequency inversion temperature (T_o )
Storage temperature range
17 dB
38 dB
50 dB
53 dB
60 dB
70 dB
60 dB
68 dB
70 dB
70 dB
75 dB
75 dB
0,2 µs
-
-
-
0,032 ppm/K²
25 °C
min. 12 dB
min. 34 dB
min. 48 dB
min. 48 dB
min. 53 dB
min. 60 dB
min. 53 dB
min. 60 dB
min. 60 dB
min. 60 dB
min. 60 dB
min. 60 dB
max. 0,5 µs
max. 20 dBm
max. 5 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.
**) ∆fc(Hz) = Tc_f(ppm/K) x (T - T_o)² x f_To (MHz)
***) insertion loss includes matching network with coils with Q value>=40,
****) if a frequency range / point is defined twice the larger attenuation value is valid
generated:
checked / approved:
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Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
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