TFS125C
TFS125C is VI TELEFILTER manufactured by Vectron International.
Tfs125C.doc version 1.2
VI TELEFILTER
Measurement condition
Ambient temperature TA: Input power level: Terminating impedances at fc: 23 °C 0 d Bm input: output:
Filter Specification
TFS 125C
1/5
605 Ω -11 p F 620 Ω -11 p F
Characteristics
Remark: Reference level for the relative attenuation arel of the TFS 125C is the maximum of the pass band attenuation amax. The maximum of the pass band attenuation amax is defined as the insertion loss ae. The centre frequence fc is the arithmetic mean value of the upper and lower frequencies at the 1 d B filter attenuation level relative to the insertion loss ae. The nominal frequency f N is fixed on 125 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 typ. value ae f N tolerance / limit max. min. 8,0 5,0 125,0 d B d B MHz
Insertion loss (Reference level) Nominal frequency
Centre frequency d B Passband ripple Relative attenuation arel f N ..... f N ± 150 f N ± 0,4 MHz...f N ± 0,6 f N ± 0,6 MHz...f N ± 1,2 f N ± 1,2 MHz...f N ± 1,8 f N ± 1,8 MHz...f N ±3,4 f N ± 3,4 MHz...f N ±9,5 f N ± 9,5 MHz.. f N ±13 f N ± 13 MHz...f N +450 Group delay
- - ) Group delay rippel
- - ) within VSWR: IP3
- -
- ) fc within ± 150 k Hz KHz MHz MHz MHz MHz MHz MHz MHz
125,0
MHz min. 1,25 1,25 2,0 .8,0 20,0 25,0 30,0 43,0 55,0 1,7 d B d B d B
- ) d B d B d B d B d B d B µs ns
- max. min. min. min. min. min. min. min. max.
± 150 k Hz max. 150,0 max. min. T.B.D T.B.D max. 10,0 2,3: 1 60,0 d B
Operating temperature range Temperature coefficient of frequency ( Tcf )
- -
- - ) Frequency inversion temperature To Input power level:
- ) The rejection is relative to the point of maximum insertion at centre frequency
- - ) measured with smoothing; smoothing aperture ≤ 30 KHz
- -
-...
