TFS125G Datasheet | Vectron International

tfs125g.doc version 1.2 VI TELEFILTER Measurement Condition Ambient temperature: Input power level: Source impedance: Load impedance: Terminating impedances: - ) 23 0 200 50 input: output: Filter Specification C d Bm balanced single ended 880 // -11,0 p F 890 // -12,6 p F TFS 125 G 1/5 Characteristics Remark: Reference level for the relative attenuation arel of the TFS 125G is the attenuation at 125 MHz. Reference for the echo response attenuation is the main time response lobe, the reference time is defined as t0. The nominal frequency f N is fixed at 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 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 Absolute attenuation within f N Nominal frequency Pass band ripple f N ..... f N f N 0,1 MHz ... f N f N 0,2 MHz ... f N 1 d B-bandwidth Relative attenuation f N ... f N f N 1,2 1,8 f N f N 6 f N - 13 f N + 13 MHz ... MHz ... MHz ... MHz ... MHz ... arel 0,5 MHz MHz MHz MHz MHz MHz arel f N 0,1 MHz typ. Value 8 d B Limit 7 ...10 125 d B MHz 0,1 MHz 0,2 MHz 0,5 MHz 1235 k Hz max. max. max. 0,25 d B 0,5 d B 1 d B k Hz min. 1000 30 50 60 65 d B d B d B d B max. min. min. min. min. min. 1 9 25 35 50 50 d B d B d B d B d B d B f N 1,8 f N 6 f N 13 f N - 115 f N + 325 Echo response attenuation t0 + 2 µs t0 + 3 µs t0 + 4 µs t0 + 5 µs t0 + 6 µs Group delay Group delay ripple within f N Input power level VSWR within f N 42 43 56 70 75 @ f N 0,5 MHz d B d B d B d B d B ns ns - min. min. min. min. min. 30 40 50 55 60 d B d B d B d B d B ns ns d Bm 705 120 max. 750 max. 150 max. + 10 min. min. 2:1 60 0,5...