TFS125D
TFS125D is VI TELEFILTER manufactured by Vectron International.
tfs125d.doc version 2.0
VI TELEFILTER
Measurement Condition
Ambient Temperature: Input Power Level: Source impedance: Load impedance: Terminating impedances:
- ) input: output:
Filter specification
TFS 125 D
1/5
23 °C 0 d Bm 50 Ω single ended 50 Ω single ended 175 Ω || -22.5 p F 200 Ω || -22.7 p F
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 d B filter attenuation level relative to the insertion loss ae. The nominal frequency f N 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
Insertion Loss (Reference level) Nominal Frequency 3 d B
- Bandwidth Pass Band Ripple Relative Attenuation 1,8 MHz ... f N ± 6 MHz ... f N ± MHz ... f N
- 124 39 MHz ... f N + Group delay f N Group delay ripple f N
- 80 k Hz ... f N + 80 k Hz Input power level Operating Temperature Range Storage Temperature Range arel f N ± 6 MHz f N ± 39 MHz f N 39 MHz f N + 775 MHz ae = amin typ. Value max.
Limit
8 d B f N BW
- 125,0 MHz min. 400 k Hz
- max.
1,0 d B
- min. min. min. min.
20 35 20 20 d B d B d B d B
- max.
µs
- max.
µs d Bm max. + 10
- 5 °C ... + 75 °C
- 40 °C ... + 85...
