TFS125D Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter specification

tfs125d.doc
VI TELEFILTER
Filter specification
version 2.0
TFS 125 D
21.02.2002
1/5
Measurement Condition
Ambient Temperature:
Input Power Level:
Source impedance:
Load impedance:
Terminating impedances: *)
input:
output:
23 °C
0 dBm
50 Ω single ended
50 Ω single ended
175 Ω || -22.5 pF
200 Ω || -22.7 pF
Characteristics
Remark:
The reference level for the relative attenuation arel of TFS 125D 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 3 dB filter attenuation level
relative to the insertion loss ae. The nominal frequency fN is fixed on 125,0 MHz without tolerance. The given values for the relative attenuation
arel and for the group delay ripple have to be reached at the frequencies given below even if the centre frequency fo 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 fo.
Data
typ. Value
Limit
Insertion Loss
(Reference level)
a_e = a_min
-
max. 8 dB
Nominal Frequency
f_N
-
125,0 MHz
3 dB - Bandwidth
BW
min. 400 kHz
Pass Band Ripple
-
max. 1,0 dB
Relative Attenuation
f_N ± 1,8 MHz ...
f_N ± 6 MHz ...
f_N - 124 MHz ...
f_N + 39 MHz ...
arel
f_N ± 6 MHz
f_N ± 39
f_N - 39
f_N + 775
MHz
MHz
MHz
Group delay
f_N
Group delay ripple
f_N – 80 kHz ... f_N + 80 kHz
Input power level
-
min. 20 dB
-
min. 35 dB
-
min. 20 dB
-
min. 20 dB
-
max. 1 µs
-
max. 1 µs
-
max. + 10 dBm
Operating Temperature Range
Storage Temperature Range
- 5 °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.
Generated:
Checked / approved:
______________________________________________________________________________________________________
VI TELEFILTER
Vectron International, Inc.
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267 Lowell Road
D 14 513 TELTOW / Germany
Hudson, NH 03051 / USA
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