T1/CEPT/ISDN TEW5009 Test Transformer TEW5009 is specifically designed to be used as an isolation transformer in test setups for testing Longitudinal Balance and Return Loss in Primary Rate and Basic Rate Circuits. transforming from balanced to unbalanced circuits. • Shield between windings. • Very low Leakage Inductance. • Excellent balance. Special attention has been given to the problems associated with the coupling capacitance between windings when MECHANICAL 4 2 ALL DIMENSIONS ARE IN INCHES H 7 Bal. 3 0.15 DIA 0.025 G G 0.70 Dimensions 1 5 15 DOT AT PIN1 L GRID 0 .10" X 0.10" G. 2 GND PINS 0.020" X 0.040" ELECTRICAL SPECIFICATIONS 93/04/26 TEW5009 Impedance ISSUE: B 9 5 8 10 6 W DRILL PATTERN COMPONENT SIDE 2 HOLES DIA. 0.055" 10 HOLES DIA. 0.040" 0.020 8 PLACES Unbal. Pri. Sec. (2-7)+(3-8) (4-9) Frequency Response 100 Ω Bal. 100 Ω Unbal. < 1.0 dB (2-7):(3-8):(4-9) 1:1:2 Inductance (4-9) > 20 mH Filtran Limited W 1.00" max. H 0.85" max Range, 75 - 150 Ω “ ” 1 KHz - 10 Mhz < 2.0 µH Leakage Ind. Dielectric Strength 1.15" max. TEW5009 Turns ratio Wind. Res. L Pri. Sec. (2-7)+(3-8) (4-9) 1.92 Ω 0.97 Ω 1500 Vrms 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel: (613) 226-1626 Fax: (613) 226-7124 6-3 T1/CEPT/ISDN TEW5009 Test Transformer R DEVICE UNDER TEST R Test Transformer TEW5009 Figure 1: Test circuit for Longitudinal Balance. R R R Device under test R R TEW5009 Figure 2: Test circuit for Return Loss Filtran Limited 229 Colonnade Road, Nepean, Ontario, Canada. K2E 7K3, Tel: (613) 226-1626 Fax: (613) 226-7124 6-4