TFS172B Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

Filename: tfs 172b.doc
VI TELEFILTER
Measurement condition
Ambient temperature:
Input power level:
Terminating impedances *): input:
output:
Source:
Load:
Version 1.3
Filter specification
23
°C
0 dBm
180 Ω || -3,4 pF
180 Ω || -3,4 pF
200
Ω
200
Ω
TFS 172B
30.04.2004
1/5
Characteristics
Remark:
The reference level for the relative attenuation arel of the TFS 172B 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 fc is the arithmetic mean value of the upper and lower frequencies at the 3 dB
filter attenuation level relative to the insertion loss ae. The nominal frequency fN is fixed at 172,8 MHz without any tolerance. The given values for both the
relative attenuation arel and the group delay ripple have to be achieved 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
(reference level)
Nominal frequency
Centre frequency
Pass band
Pass band ripple
Relative attenuation
f_N - 172,5 MHz … f_N -
f_N + 30,2 MHz … f_N +
ae = amin
f_N
f_C
29,8
827,2
arel
MHz
MHz
typ. value
3,1 dB
172,8 MHz
0,5 dB
54
dB
53
dB
tolerance / limit
max.
min.
4,0
2,0
172,8
dB
dB
MHz
f_N ±
max.
4,42 MHz
0,8 dB
min.
40 dB
min.
40 dB
Group delay ripple within PB
70
ns
max.
100 ns
VSWR within PB
1,5 : 1
max.
2,5 : 1
Input power level
-
max.
10 dBm
Operating temperature range
OTR
-
- 10 °C ... + 85°C
Storage temperature range
-
- 30 °C ... + 90°C
Temperature coefficient of frequency
TCf **
-78
ppm/K
-
*) 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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