TFS248F Datasheet, PDF (1/5 Pages) Vectron International, Inc – Filter Specification

Tfs248F.doc
VI TELEFILTER
Version 3.0
Filter Specification
TFS 248F
15.11.2002
1/5
Measurement condition
Ambient temperature:
23 C
Input power level:
0 dBm
Terminating impedance:
input:
50 ; unbalanced; no matching network
output:
200 ; balanced, no matching network
Characteristics
Remark:
Reference level for the relative attenuation arel of the TFS 248 F 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 nominal frequency fN is fixed at 248,6 MHz. 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 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
fN
Centre Frequency
fC
3 dB Band width
Pass Band Ripple fN 120 KHz
Relative Attenuation
arel
fN – 238,6 MHz ... fN –29,2 MHz
typ. Value
2,95 dB
-
-
6,44 MHz
4,30 MHz
50 dB
Limit
3,5 dB
248,6 MHz
-
min 5,0 MHz
max 0,5 dB
min. 45 dB
@ f_N + 22,8
@ f_N + 52,0
@ f_N + 74,8
@ f_N + 104,0
@ f_N + 126,8
MHz
MHz
MHz
MHz
MHz
Group Delay GD
Group Delay Ripple fN ± 120 kHz
Input Power Level
Operating Temperature Range
Storage Temperature Range
Temperature Coefficient of Frequency
TCf
55 dB
58 dB
56 dB
55 dB
55 dB
55 ns
-
–33,5 ppm/K
min. 45 dB
min. 45 dB
min. 45 dB
min. 45 dB
min. 45 dB
max. 300,0 ns
max. 20,0 dBm
- 20 °C ... + 80 °C
- 40 °C ... + 85 °C
-
generated:
checked / approved:
Construction and Pin Connection
(All dimensions in mm)
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