TFS248H Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Tfs248h.doc
VI TELEFILTER
version 1.2
Filter specification
TFS 248 H
22.09.2003
1/5
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances at fc *)
Characteristics
23
0
input:
output:
C
dBm
346 || -7,7pF
406 || -7,4pF
Remark:
The reference level for the relative attenuation arel of TFS 248H is the minimum of the pass band attenuation amin. This value is defined as the
insertion loss ae. The centre frequency fc is the arithmetic mean value of the upper and lower frequencies at the 1 dB filter attenuation level
relative to 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
typ. Value
Limit
Insertion Loss
ae = amin
(at ambient temperature)
Nominal Frequency
fN
Centre Frequency
fc
Passband Ripple (p-p) f_N 100 kHz
Relative Attenuation ***) arel
f_N
... f_N
0,1 MHz
f_N
0,33 MHz ... f_N
0,6 MHz
f_N
0,6 MHz ... f_N
0,8 MHz
f_N
0,8 MHz ... f_N
1,6 MHz
f_N
1,6 MHz ... f_N 100 MHz
f_N - 2,2 MHz ... f_N - 29,2 MHz
f_N - 236,6 MHz ... f_N - 29,2 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
5 dB
-
248,6 MHz
0,4 dB
17
dB
35
dB
50
dB
53
dB
60
dB
65
dB
60
dB
65
dB
70
dB
70
dB
75
dB
75
dB
0,3 µs
-
-
max. 6 dB
248,6 MHz
-
max. 1 dB
max. 1 dB
min. 12 dB
min. 25 dB
min. 45 dB
min. 48 dB
min. 53 dB
min. 55 dB
min. 53 dB
min. 55 dB
min. 55 dB
min. 55 dB
min. 55 dB
min. 55 dB
max. 0,5 s
max. 20 dBm
max. 5 dBm
Operating Temperature Range
-
-
- 20 °C ... + 80 °C
Storage temperature range
-
- 40 °C .....+ 85 °C
Temperature Coefficient **)
TC
0,032 ppm/K²
-
Frequency inversion temperature (To )
25
°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/K²) x (T-T0)² x fTo(MHz)
***) if a frequency range / point is defined twice the larger attenuation value is valid
generated:
checked / approved:
TELEFILTER GmbH
Potsdamer Straße 18
D 14 513 TELTOW / Germany
Tel: [phone] / Fax: [phone]
E-Mail: [e-mail]
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