TFS254A Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

TFS254A.doc
VI TELEFILTER
Measurement condition
Ambient temperature: 23 °C
Input power level:
0 dBm
Terminating impedances
for input: 625 Ω // -6,1 pF
for output: 340 Ω // -8,5 pF
Filter Specification
version 1.1
TFS 254 A
16.03.2001
1/5
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 254 A 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 on 254,4 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 also 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)
ae = amin
Nominal frequency
Centre frequency
1 dB bandwidth
fN
fc
BW
Relative attenuation
fN ± 700 kHz ... fN ±
fN ± 3 MHz ...fN ±
Group delay ripple
fN ± 190 kHz
Input power level
arel
3 MHz
30 MHz
GD
Operating temperature range
Storage temperature range
Temperature coefficient of frequency TC
Frequency inversion temperature
typ. value
5,7 dB
-
254,412 MHz
-
-
-
-
-
- 0.036 ppm/K²
+ 35 °C
tolerance/limit
max. 14
dB
254,400 MHz
-
min. 380
kHz
min. 30
dB
min. 40
dB
max. 300
ns
max. 10
dBm
- 0 °C ... + 70 °C
- 45 °C ... + 85 °C
Generated:
Checked / approved:
Construction and pin connection
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Vectron International, Inc.
267 Lowell Road
Hudson, NH 03051 / USA
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