Audio Line Coupling/ Bridging Transformer 3858-X 3858 is a 1:1 line matching transformer with the following features: • Low profile • Small volume • Conforming to FCC part 68, Canadian CS 03 regulations • Low cost • High insulation voltage Applications: Interfacing equipment to telephone line, requiring small size and high insulation voltage. 3858-2 is designed for high impedance bridging applications. MECHANICAL AND SCHEMATIC (All dimensions in inches) 3858-1 3858 3858-2, 3858-3 UNLESS OTHERWISE SPECIFIED, ALL TOLERANCES ARE ±0.010 ISSUE: F 23/10/02 3858-X ELECTRICAL SPECIFICATION @ 25 ˚C Impedance Insertion Loss Frequency Response Longitudinal Balance DCR Return Loss Bridging Loss on 600 Ω line terminated with 10 KΩ at the output Dielectric Strength (Ω) ( dB ) ( dB ) ( dB ) (Ω) (Ω) ( dB ) ( dB ) @ 1000 Hz 300 – 3500 Hz 300 – 3500 Hz Pri Sec 300 – 3500 Hz (Vrms) 3858 600 : 600 < 1.0 < 1.0 > 65 57 57 > 15 - 3858-1 600 : 600 < 1.0 < 1.0 > 65 57 57 > 15 - 3858-2 10 K : 10 K < 0.5 < 0.5 > 65 250 250 < 0.25 3858-3 10 K : 10 K < 0.5 < 0.7 > 65 125 125 < 0.25 4000 4000 2500 2500 229 Colonnade Road, Ottawa, Ontario, Canada K2E 7K3 Tel: (613) 226-1626 Fax: (613) 226-7124 www.filtran.com An ISO 9001 Registered Company